WO2012081374A1 - Multiple rotor-type electric motor - Google Patents
Multiple rotor-type electric motor Download PDFInfo
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- WO2012081374A1 WO2012081374A1 PCT/JP2011/077151 JP2011077151W WO2012081374A1 WO 2012081374 A1 WO2012081374 A1 WO 2012081374A1 JP 2011077151 W JP2011077151 W JP 2011077151W WO 2012081374 A1 WO2012081374 A1 WO 2012081374A1
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- rotor
- winding
- stator
- phase
- magnetic field
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L50/15—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with additional electric power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Definitions
- the present invention relates to an electric motor, and more particularly to a multi-rotor electric motor having a plurality of rotors.
- Hybrid vehicles are equipped with an engine and an electric motor as drive sources, and can be driven by the electric motor or driven by the electric motor alone.
- a three-phase AC motor is used as the electric motor, and the running speed is generally variably controlled by energization control with an inverter device.
- a multiple rotor electric motor having a plurality of rotors has been proposed.
- a vehicle transmission disclosed in Patent Document 1 includes a first rotating electrical machine that is connected to an engine and functions as at least a generator, a second rotating electrical machine that is coupled to a wheel shaft and functions as at least an electric motor, The first and second driving means for driving the second rotating electrical machine and a control means are provided, and an object is to generate a larger torque when the vehicle starts from the control means.
- 1st Embodiment shown by FIG. 1 of patent document 1 is provided with the 1st and 2nd rotary electric machine by another body, and the aspect to which another inverter is each connected is disclosed.
- the third embodiment shown in FIG. 8 discloses an aspect of a double rotor structure constituted by the first and second rotating electrical machines.
- a brush is used to extract electric power from a first rotor that is connected to an engine and wound with a three-phase winding.
- a big creep torque can be generated when the vehicle starts.
- the electric continuously variable transmission of Patent Document 2 includes a main motor having a double rotor structure, a sub motor that adjusts the torque of the output shaft, and a main and sub inverter.
- the main motor includes a first rotor that is directly connected to the engine and rotates, and a second rotor that drives the axle. It is described that the first rotor is provided with a three-phase winding and current is supplied from an inverter, and it is estimated that a member corresponding to the brush of Patent Document 1 is provided.
- JP 2005-47396 A Japanese Patent Laid-Open No. 10-42600
- Patent Document 1 since the two rotating electric machines (motor units) are provided separately, the apparatus becomes large and the cost increases. For this reason, a double rotor structure electric motor that integrates two rotating electric machines to reduce the size and cost is disclosed in the third embodiment of Patent Document 1 and Patent Document 2, but rotates.
- a rotating power supply unit such as a brush is provided. Therefore, the effect of downsizing is reduced by the space of the rotary power feeding unit. In addition, maintenance is required for wear and fatigue of the rotating power feeding portion due to use over time, which increases running costs.
- an inverter for power supply is provided in each of the two rotating electric machines, and the manufacturing cost is also increased.
- the present invention has been made in view of the problems of the above-described background art, and by combining a plurality of motor units and driving them with a single power supply unit, high-speed rotation, downsizing, cost reduction, and An object to be solved is to provide a multi-rotor motor that realizes maintenance-free operation.
- the invention of a multi-rotor electric motor according to claim 1 for solving the above-described problem is provided by a stator having a stator winding for forming a stator rotating magnetic field and fixed to a case, and the stator rotating magnetic field.
- a rotating field part that generates torque by electromagnetic interaction, an induction winding that generates an induced electromotive force by electromagnetic induction action with the stator rotating magnetic field, and the stator rotating magnetic field that is electrically connected to the induction winding
- Output that generates torque by electromagnetic interaction between the rotor rotating magnetic field and a composite rotor that is rotatably supported by the case and has a rotor winding that forms a rotor rotating magnetic field in the same rotational direction as
- Output shaft Two different alternating current
- the torque T2 between the wire and the rotating field part is the torque Tout between the rotor winding and the output field part
- the magnetic flux ⁇ 1 ⁇ the magnetic flux ⁇ 2 and the torque T1 ⁇ the above
- the rotation speed n1 when the rotation direction of the first stator rotating magnetic field and the second stator rotating magnetic field is the same, the rotation speed n1 ⁇ the rotation speed n2 and When the rotation direction of the first stator rotating magnetic field and the second stator rotating magnetic field is different, the rotation speed n1 is expressed as a negative value, and 0 ⁇ (the absolute value of the rotation speed n1) ⁇ (2 ⁇ the rotation speed n2). It is.
- a core included in the rotating field portion of the composite rotor and the induction winding and a core included in the rotor winding. It has a magnetic separation part that magnetically separates them.
- the invention according to claim 5 is the first motor unit according to any one of claims 1 to 4, comprising the stator winding of the stator and the rotating field portion of the composite rotor;
- the second motor unit composed of the rotor winding of the composite rotor and the output field portion of the rotor have substantially the same output characteristics indicating the relationship between the rotational speed and torque.
- the second motor unit can output up to twice the number of rotations of the first motor unit.
- the invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the stator winding of the stator, the induction winding and the rotor winding of the composite rotor are all three-phase connected. In addition, the induction winding and the rotor winding are electrically connected with two phases interchanged.
- the invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the stator winding of the stator, the induction winding and the rotor winding of the composite rotor are all the same coil.
- the arrangement order of the phases in the circumferential direction also matches.
- the invention according to claim 9 is the invention according to claim 8, wherein the induction winding and the rotor winding of the composite rotor are three-phase connected, and three of the induction windings of the composite rotor in the circumferential direction are connected. The phase position and the three-phase position of the rotor winding coincide.
- the invention according to a tenth aspect is the invention according to any one of the sixth to ninth aspects, wherein each of the phase terminals is configured by performing Y-connection or ⁇ -connection in the induction winding and the rotor winding of the composite rotor. And any two phases of the corresponding phase terminals of the induction winding and the rotor winding are switched and electrically connected.
- the invention according to claim 11 is the invention according to any one of claims 1 to 6, wherein a toroidal coil group is used instead of the induction winding and the rotor winding of the composite rotor.
- the first motor unit is composed of the stator winding of the stator and the rotating field portion of the composite rotor, and the rotor winding and the rotor of the composite rotor.
- the second motor unit is composed of the output field portion.
- torque is generated by the electromagnetic interaction between the stator winding of the stator and the rotating field portion of the composite rotor, so that the stator rotating magnetic field formed by two alternating currents having different frequencies is generated.
- the composite rotor rotates in synchronization with one side.
- the synchronized rotating magnetic field does not change, and only the other rotating magnetic field changes including the rotational speed of the composite rotor.
- an induced electromotive force is generated in the induction winding, and the rotor winding forms a rotor rotating magnetic field in the same rotation direction as the rotation of the composite rotor by optimizing the electrical connection with the rotor winding. can do. That is, in the second motor unit, it is possible to form a rotor rotating magnetic field that rotates at a higher speed on the rotating composite rotor.
- the rotor and the output shaft that rotate in synchronization with the rotor rotating magnetic field can be rotated at a high speed, and in particular, an output rotational speed larger than the rotational speed derived from the frequency of the power supply unit can be obtained.
- the number of rotations derived from the frequency of the power supply unit means a synchronization frequency determined by the frequency of the power supply unit in a general electric motor.
- a plurality of motor units are not provided separately, but are combined and integrated.
- an induction electromotive force can be generated in a non-contact manner by an induction winding, and a rotating power supply unit such as a brush is unnecessary.
- the size of the electric motor can be reduced, and the manufacturing cost is reduced.
- the power supply unit can be realized by a single inverter device, the manufacturing cost is further reduced.
- the rotating power feeding unit is unnecessary, maintenance-free operation can be realized and the running cost can be reduced.
- the composite rotor rotates at the rotational speed n2 in synchronization with the rotating magnetic field of the second alternating current that generates the large torque T2 with the large magnetic flux ⁇ 2 among the first and second alternating currents.
- the torque Tout between the rotor winding and the output field part is smaller than (torque T2-torque T1), the rotor and the output shaft are operated at high speed in synchronization with the rotor rotating magnetic field of the composite rotor.
- the rotation of the composite rotor does not fluctuate, and the output rotation speed of the output shaft is stabilized.
- the rotation speed n1 is smaller than the rotation speed n2, the rotating magnetic field of the magnetic flux ⁇ 1 acts in the reverse rotation direction in the induction winding on the composite rotor.
- inductive electromotive force is generated in the induction winding in a phase opposite to that of the power supply unit, and the rotor rotating magnetic field in the same rotational direction as the rotation of the composite rotor is obtained by optimizing the electrical connection with the rotor winding.
- the rotation speed n1 is expressed as a negative value.
- This can be realized by controlling the phase orders of the first and second alternating currents having different frequencies to be different from each other.
- This output shaft rotational speed Nout is approximately twice the rotational speed n2 derived from the frequency of the power supply section.
- the invention according to claim 4 further includes a magnetic separation unit that magnetically separates the core of the rotor winding and the core of the rotor winding and the core of the rotor winding of the composite rotor. Therefore, magnetic interference between the two cores in the composite rotor is suppressed, and the first and second motor units operate independently of each other, so that the multi-rotor motor is highly efficient and stable. it can.
- the first motor unit composed of the stator winding of the stator and the rotating field portion of the composite rotor, and the rotor winding of the composite rotor and the output field portion of the rotor
- the output characteristics indicating the relationship between the rotational speed and the torque are substantially the same as those of the second motor unit constituted by Accordingly, the first and second motor units can rationally share the rotational speed in order to obtain a high-speed output rotational speed, and the manufacturing cost is reduced.
- the second motor unit can output up to twice the number of rotations of the first motor unit. Therefore, it is possible to realize an output rotational speed that is three times the rotational speed derived from the frequency of the power supply unit, which is the upper limit in the present invention.
- the stator winding of the stator, the induction winding and the rotor winding of the composite rotor are respectively connected in three phases, and the induction winding and the rotor winding are two The phases are switched and electrically connected.
- the present invention can be configured using three-phase windings, and can be applied to the technology of a conventional three-phase AC motor or a three-phase inverter device as a power supply unit. Therefore, the operation of the multi-rotor motor is stable and economical. Also, the electrical connection can be easily optimized by switching two phases between the induction winding and the rotor winding.
- the stator winding of the stator, the induction winding of the composite rotor, and the rotor winding all have the same coil configuration, and the arrangement order of the phases in the circumferential direction also matches. Furthermore, in the invention according to claim 9, the induction winding and the rotor winding of the composite rotor are three-phase connected, and the three-phase position of the induction winding of the composite rotor in the circumferential direction and the rotor winding The position of the three phases is the same. As a result, the coil configuration of the stator winding, the induction winding, and the rotor winding and the connection method between the coils are unified so that the manufacturing work can be easily performed and the manufacturing cost can be reduced.
- each phase terminal is configured by performing Y connection or ⁇ connection in the induction winding and the rotor winding of the composite rotor, and the induction winding and the rotor winding correspond to each other. Two phases of each phase terminal are switched and electrically connected. Thereby, electrical connection can be easily optimized and high-speed output rotation speed can be obtained.
- a toroidal coil group is used in place of the induction winding and the rotor winding of the composite rotor.
- Each toroidal coil constituting the toroidal coil group can generate an induced electromotive force by an electromagnetic induction effect linked to the stator rotating magnetic field, and a current flows through the induced electromotive force to form a rotor rotating magnetic field. That is, each toroidal coil can serve as both an induction winding and a rotor winding, and the same effects as in claims 1 to 6 are produced. Furthermore, since the holding strength with which the coil is held by the core is improved, it is easy to secure the anti-centrifugal strength of the coil, and the manufacturing cost can be reduced.
- FIG. 3 is an axial direction view showing a configuration of a stator, a composite rotor, and an electrical angle of 360 ° of the rotor in a straight line. It is a figure explaining the connection method and electrical connection of a stator winding, an induction winding, and a rotor winding. It is a figure which illustrates and illustrates the coil structure for the electrical angle of 360 ° of the stator winding, the induction winding, and the rotor winding when the stator side is viewed from the rotor side.
- FIG. 6 is a graph showing the rotational speed increase rate obtained in FIG. 5. It is a table
- FIG. 9 is an axial view seen from a linear development of a configuration of an electrical angle of 360 ° of a stator, a composite rotor, and a rotor of a multi-rotor motor of a second embodiment.
- FIG. 10 is an axial direction view showing a configuration of an electrical angle of 360 ° of a variation of the multi-rotor electric motor of the second embodiment expanded linearly. It is a figure explaining the connection method and electric connection of the stator winding
- FIG. 1 is a cross-sectional view conceptually illustrating the configuration of a multi-rotor motor 1 of the first embodiment.
- the multi-rotor motor 1 of the first embodiment has a generally axisymmetric shape centered on the axis AX, and includes a case 2, a stator 3, a composite rotor 4, a rotor 5, an output shaft 6, a power supply unit 7, and the like. It consists of
- the composite rotor 4 includes a rotating field portion 41, an induction winding 44, a rotor winding 47, and the like. In FIG. 1, only one half of the axis AX is shown for the stator 3 and the composite rotor 4.
- the stator winding 31 of the stator 3 and the rotating field portion 41 of the composite rotor 4 constitute an outer motor unit, and the rotor winding 47 of the composite rotor 4 and the output field portion 51 of the rotor 5 serve as an inner motor unit.
- a motor unit is configured.
- the outer motor unit and the inner motor unit are configured such that output characteristics indicating the relationship between the rotational speed and the torque are substantially the same.
- the stator 3 is fixed to the inner peripheral surface of the case 2.
- the stator 3 has a substantially cylindrical core 32 formed by laminating electromagnetic steel plates, and a stator winding 31 is wound around a convex tooth formed on the core 32.
- the stator winding 31 is composed of a plurality of coils for each of the three phases, and is arranged so as to form a stator rotating magnetic field when an alternating current is applied.
- the composite rotor 4 is disposed on the inner diameter side of the stator 3 and is rotatably supported on the case 2 by a bearing portion (not shown).
- the composite rotor 4 has an outer core 42 formed by laminating electromagnetic steel plates in a substantially cylindrical shape on the outer diameter side, and an induction winding 44 is wound around a convex tooth formed on the outer core 42. ing.
- the induction winding 44 is composed of a plurality of coils for each of the three phases, and generates an induced electromotive force by an electromagnetic induction action with the stator rotating magnetic field formed by the stator winding 31.
- a field magnet is embedded in the outer core 42, and a rotating field portion 41 is formed by alternately arranging N poles and S poles in the circumferential direction.
- the rotating field portion 41 generates torque by electromagnetic interaction with the stator rotating magnetic field formed by the stator winding 31.
- the composite rotor 4 has an inner core 48 formed by laminating electromagnetic steel plates in a substantially cylindrical shape on the inner diameter side, and the rotor winding 47 is wound around the convex teeth formed on the inner core 48. Is formed. Between the inner core 48 and the outer core 42, a magnetic separation portion 45 that magnetically separates both the cores 48, 42 is provided.
- the magnetic separation unit 45 can be configured using, for example, a nonmagnetic material. Alternatively, the yoke widths of the inner core 42 and the outer core 48 may be sufficiently widened to suppress mutual magnetic leakage.
- the magnetic separation unit 45 allows the rotating field unit 41 and the induction winding 44 and the rotor winding 47 to operate independently of each other without magnetic interference.
- the rotor winding 47 is composed of a plurality of coils for each of the three phases, and is electrically connected to the induction winding 44 by connection leads 49.
- the connection lead 49 is properly wired so that a current flows through the rotor winding 47 due to the induced electromotive force generated in the induction winding 44 and forms a rotor rotating magnetic field in the same rotational direction as the rotation of the composite rotor 4. Has been.
- the rotor 5 is disposed on the inner diameter side of the composite rotor 4.
- the rotor 5 has a core 52 formed by laminating electromagnetic steel plates in a substantially cylindrical shape.
- a field magnet is embedded in the core 52, and an output field portion 51 is formed by alternately arranging N poles and S poles in the circumferential direction.
- the output field portion 51 generates torque by electromagnetic interaction with the rotor rotating magnetic field formed by the rotor winding 47. With this torque, the rotor 5 can rotate in the same direction as the composite rotor 4 and at a higher speed than the composite rotor 4.
- the output shaft 6 is configured to penetrate the axis AX of the rotor 5 and rotate integrally therewith, and is rotatably supported by the case 2 by the bearing portion 21.
- the power supply unit 7 includes a DC power supply device 71, an inverter device 72, an inverter control unit 73, and the like.
- a battery is used as the DC power supply device 71 and its output terminal is connected to the inverter device 72 to supply a DC voltage.
- the inverter device 72 can convert direct current into three-phase alternating current, and can apply two three-phase alternating currents having different frequencies to the stator winding 31 in an overlapping manner.
- the inverter device 72 can switch the phase order of the two three-phase alternating currents independently of the normal phase order and the reverse phase order.
- the inverter control unit 73 variably controls the frequency, current value, phase, and phase order of the two three-phase alternating currents.
- FIG. 2 is an axial view of the configuration of the stator 3, the composite rotor 4, and the rotor 5 corresponding to an electrical angle of 360 ° developed linearly.
- the upper side is the outer diameter side
- the lower side is the inner diameter side
- the left-right direction is an arc-shaped portion corresponding to an electrical angle of 360 ° in the circumferential direction developed linearly.
- the number of pole pairs of the stator winding 31 and the rotor winding 47 is the same, and therefore the electrical angle 360 ° of the outer motor unit and the inner motor unit is the same mechanical angle.
- the stator 3 arranged on the outermost diameter side has a core 32 having 12 inwardly convex teeth 321 at an electrical angle of 360 °, and a stator winding 31 of distributed winding. ing.
- the stator winding 31 is composed of a U-phase winding (solid line in the figure), a V-phase winding (broken line in the figure), and a W-phase winding (one-dot chain line in the figure) in order from the inner diameter side.
- Each phase winding has two coils in an electrical angle of 360 °.
- the two U-phase coils 31U1 and 31U2 of the U-phase winding are just within an electrical angle of 360 °.
- the two U-phase coils 31U1 and 31U2 each circulate five teeth 321 and one vacant tooth 321A is disposed therebetween.
- the two V-phase coils 31V1 and 31V2 are arranged on the right side of the figure by four teeth 321 rather than the U-phase, and are wound in the same manner as the U-phase coils 31U1 and 31U2.
- two W-phase coils 31W1 are arranged on the right side of the figure by four teeth 321 rather than the V-phase, and are wound in the same manner as the U-phase coils 31U1 and 31U2. Is formed. That is, the coil configuration is the same for each phase, and the arrangement is shifted by four teeth 321 in the circumferential direction in the order of the U phase, the V phase, and the W phase.
- the composite rotor 4 is disposed on the inner diameter side of the stator 3 via a gap G1.
- the composite rotor 4 includes an outer core 42 on the outer diameter side having twelve outwardly convex teeth 421 at an electrical angle of 360 °, an inner core 48 on the inner diameter side having twelve inwardly convex teeth,
- the magnetic separation portion 45 is disposed between the cores 42 and 48 and has a three-layer structure.
- the distributed winding induction winding 44 wound around the outer core 42 is arranged symmetrically with respect to the stator winding 31 of the stator 3.
- the distributed winding rotor windings 47 wound around the teeth of the inner core 48 are arranged symmetrically with respect to the induction winding 44 of the composite rotor 4. That is, in order from the inner diameter side, two U-phase coils 47U1 and 47U2 constituting a U-phase winding (solid line in the figure), and two V-phase coils 47V1 and 47V2 constituting a V-phase winding (dashed line in the figure). , Two W-phase coils 47W1 (the second is not shown) constituting the W-phase winding (the one-dot chain line in the figure) are arranged.
- the in-phase coils of the induction winding 44 and the rotor winding 47 are arranged symmetrically with the magnetic separation part 45 in between. That is, the three-phase position of the induction winding 44 of the composite rotor 4 and the three-phase position of the rotor winding 47 in the circumferential direction coincide with each other.
- a rotor 5 is disposed on the inner diameter side of the composite rotor 4 via a gap G2.
- a pair of field magnets 51 ⁇ / b> N and 51 ⁇ / b> S are embedded to form an output field portion 51.
- stator winding 31, the induction winding 44, and the rotor winding 47 have neutral points 31N, 44N, and 47N, respectively, and are three-phase Y-connected.
- U-phase terminal 31 UT, V-phase terminal 31 VT, and W-phase terminal 31 WT of stator winding 31 are electrically connected to inverter device 72 of power supply unit 7. Further, the stator winding 31 and the induction winding 44 are coupled by electromagnetic induction.
- the magnetic separation portion 45 is interposed, so that no electromagnetic induction action occurs, and any two phases are switched by the connection lead 49 and are electrically connected.
- the U-phase terminal 44UT of the induction winding 44 is electrically connected to the V-phase terminal 47VT of the rotor winding 47
- the V-phase terminal 44VT of the induction winding 44 is the U-phase terminal of the rotor winding 47. It is electrically connected to 47UT, and W-phase terminals 44WT and 47WT are electrically connected to each other.
- FIG. 4 is a diagram illustrating an example of the coil configuration of the stator winding 31, the induction winding 44, and the rotor winding 47 for an electrical angle of 360 °.
- a U-phase winding is illustrated in the upper stator winding 31 in the figure. That is, the conductor coming out of the U-phase terminal 31UT circulates the teeth 321 clockwise by a predetermined number of times by the first U-phase coil 31U1, and then turns the teeth 321 over the second U-phase coil 31U2. It shows that the neutral point 31N is reached by rotating counterclockwise a predetermined number of times.
- the V-phase winding and the W-phase winding of other phases not shown in the figure have the same coil configuration by sequentially shifting four teeth 321 in the circumferential direction.
- the coil configuration of the middle induction winding 44 in the figure is the same as that of the stator winding 31, and two U-phase coils 44U1 and 44U2 of the U-phase winding are illustrated.
- the coil configuration of the lower rotor winding 47 is the same as that of the stator winding 31, and two V-phase coils 47V1 and 47V2 are illustrated.
- the connection lead 49 is connected to the U-phase terminal 44 UT of the induction winding 44 and the V-phase of the rotor winding 47 so that the induction winding 44 and the rotor winding 47 are electrically connected by switching the U-phase and the V-phase.
- the terminal 47VT is electrically connected.
- the operation of the multi-rotor motor 1 according to the first embodiment configured as described above will be described.
- the frequency, current value, and phase of the two three-phase alternating currents can take independent and independent values, and the phase order can also be changed. Therefore, the magnetic flux ⁇ 1 of the first stator rotating magnetic field formed by the first alternating current having the frequency f1 and the rotation speed n1, and the magnetic flux ⁇ 2 of the second stator rotating magnetic field formed by the second alternating current having the frequency f2 are rotated.
- the number n2 When the number n2 is set, generality is not lost even if magnetic flux ⁇ 1 ⁇ magnetic flux ⁇ 2. That is, the side where the current value is large and generates a larger magnetic flux is defined as the second alternating current.
- the rotation number n2 f2 / P (rps) of the second stator rotating magnetic field is a positive value.
- the phases of the magnetic fluxes ⁇ 1 and ⁇ 2 are optimized so that the composite rotor 4 and the rotor 5 generate a desired torque, respectively.
- FIG. 5 is a table for explaining the rotational speed increase rate K and the output characteristics obtained when the first and second alternating currents are energized through the stator winding 31.
- the column of the rotational speed condition in the list shows the condition of the magnitude relationship between the positive and negative of the rotational speed n1 and the rotational speed n2.
- the column of the number of rotations derived from the power supply unit in the list means a synchronous frequency determined by the frequency of the power supply unit in a general electric motor, and the above-described rotation number n1 (absolute value in the case of a negative value) and rotation number n2 The larger side.
- the column of the rotational speed increase rate K in the list is a rate indicating how many times the output rotational speed Nout obtained by the output shaft 6 is higher than the rotational speed derived from the power supply unit.
- the rotational speed increase rate K is an index for evaluating how much high-speed rotation can be achieved compared to a general electric motor including a single stator and a rotor.
- the column of output characteristics in the list shows the overall output characteristics of the multi-rotor motor 1 in comparison with the characteristics of the single outer motor unit and the single inner motor unit, with the horizontal axis representing the rotational speed and the vertical axis representing the torque. Is.
- the stator winding 31 has a first phase.
- the first and second stator rotating magnetic fields are generated in the stator winding 31 in a cumulative manner.
- the rotating field part 41 of the composite rotor 4 synchronizes with the second stator rotating magnetic field that generates a large torque T2 with a large magnetic flux ⁇ 2. That is, the composite rotor 4 rotates at the rotation speed n2.
- the phase of the magnetic flux ⁇ 1 is optimized for the rotor 5, and is shifted from the composite rotor 4. For this reason, torque T1 becomes small. In addition, since the rotating magnetic field deviates from the synchronous rotational speed, the torque T1 becomes almost zero when averaged over time. In addition, it is also possible to intentionally adjust the frequency and phase of the first and second alternating currents so that this situation is realized.
- the second stator rotating magnetic field synchronized with the induction winding 44 on the composite rotor 4 does not change, and the first stator rotating magnetic field (magnetic flux ⁇ 1) is not changed.
- Only the rotational speed n1) includes the rotational speed n2 of the composite rotor 4 and changes with the rotational speed Na. Then, an induced electromotive force having a frequency corresponding to the rotation speed Na is generated in the induction winding 44, a current flows through the rotor winding 47, and a rotor rotating magnetic field is generated.
- the number of rotations of the rotor rotating magnetic field on the composite rotor 4 is obtained by inverting the sign of the number of rotations Na.
- the rotational speed of the rotor rotating magnetic field viewed from the output field unit 51 is a value obtained by inverting the sign of the rotational speed Na to the rotational speed n2 of the composite rotor 4 and adding it.
- the rotor 5 and the output shaft 6 rotate in synchronization with this rotor rotating magnetic field. Therefore, the output shaft 6 can obtain an output rotational speed Nout obtained by inverting the sign of the rotational speed Na to the rotational speed n2 of the composite rotor 4 and adding it.
- a large output rotational speed Nout can be obtained when the rotational speed Na is a negative value.
- the four conditions that consider the magnitude and positive / negative of the rotation speed n1 of the first stator rotating magnetic field are considered separately.
- the output characteristics of the multi-rotor motor 1 are positioned on the higher speed rotation side than the outer motor unit and the inner motor unit alone. is doing. That is, there is an effect that the rotation speed increase rate K2 to K4 exceeds 1, and a high speed rotation speed can be obtained.
- FIG. 6 is a graph showing the rotational speed increase rate K (K1 to K4) obtained in FIG.
- the horizontal axis represents the rotational speed n1
- the vertical axis represents the rotational speed increase rate K.
- the rotational speed increase rate K becomes the maximum value 3.
- the outer motor unit and the inner motor unit are configured such that the output characteristics indicating the relationship between the rotational speed and the torque are substantially the same.
- the rotational speed increase rate K is 3 and the current value. It is possible to realize the multi-rotor motor 1 that outputs torque according to the above.
- the multi-rotor motor 1 of the first embodiment high-speed rotation is possible until the rotation speed increase rate K reaches a maximum of 3.
- a plurality of motor units are not provided separately, but are combined and integrated, and an induction electromotive force can be generated in a non-contact manner by the induction winding 44, so that a rotating power supply unit such as a brush is unnecessary, so that multiple rotations are possible.
- the child electric motor 1 can be reduced in size, and the manufacturing cost is reduced.
- the power supply unit 7 can be realized by a single inverter device 72, the manufacturing cost is further reduced.
- the rotating power feeding unit is unnecessary, maintenance-free operation can be realized and the running cost can be reduced.
- stator winding 31 of the stator 3 and the induction winding 44 of the composite rotor 4 have the same coil configuration and are arranged so that the arrangement order of the phases in the circumferential direction also coincides. Further, the three-phase position of the induction winding 44 of the composite rotor 4 and the three-phase position of the rotor winding 47 in the circumferential direction coincide with each other. As a result, the coil configuration of each of the windings 31, 44 and 47 and the connection method between the coils are unified, making it easy to understand and making the manufacturing work easy, and reducing the manufacturing cost. In addition, since any two phases of the corresponding phase terminals of the induction winding 44 and the rotor winding 47 are switched and electrically connected, the electrical connection can be easily optimized.
- the number of pole pairs of the stator winding 31 and the rotor winding 47 is the same, but can be different.
- the general rotational speed increase rate K in this case can be obtained from FIG.
- FIG. 7 is a table illustrating the rotational speed increase rate K when the number of pole pairs of the stator winding and the rotor winding is different.
- the number of pole pairs P2 of the stator windings and the number of pole pairs P1 of the rotor windings As in the case of FIG.
- FIG. 8 is an axial direction view showing the configuration of the stator 3, the composite rotor 40, and the rotor 5 for the electrical angle of 360 ° of the multi-rotor motor 10 of the second embodiment in a straight line. is there.
- FIG. 8 is an axial direction view showing the configuration of the stator 3, the composite rotor 40, and the rotor 5 for the electrical angle of 360 ° of the multi-rotor motor 10 of the second embodiment in a straight line. is there.
- the toroidal coil group 8 is composed of 12 toroidal coils in the range of an electrical angle of 360 °, which will be described in detail below.
- the two U-phase coils 44U1 and 44U2 constituting the induction winding 44 and the two V-phase coils 47V1 and 47V2 constituting the rotor winding 47 are provided.
- four U-V phase toroidal coils 81 to 84 are provided.
- the two V-phase coils 44V1 and 44V2 constituting the induction winding 44 and the two U-phase coils 47U1 and 47U2 constituting the rotor winding 47 four VU-phase toroidal coils 85 are provided. To 87 (the fourth is not shown).
- the toroidal coils 81 to 89 are wound around the magnetic separation portion 45 so as to be linked to both the outer core 42 and the inner core 48 of the composite rotor 40.
- the first U-V phase toroidal coil 81 includes one of the teeth 422 of the outer core 42 around which the first U-phase coil 44U1 of the induction winding 44 is wound, and the first winding of the rotor winding 47. Winding is formed between one tooth 482 of the inner core 48 around which the V-phase coil 47V1 is wound.
- the second UV-phase toroidal coil 82 includes a first tooth 423 between the other teeth of the outer core 42 around which the first U-phase coil 44U1 of the induction winding 44 is wound, and a first winding of the rotor winding 47. Winding is formed between the other teeth 483 of the inner core 48 around which the V-phase coil 47V1 is wound.
- Third and fourth UV phase toroidal coils 83, 84 are respectively connected between one and other teeth 424, 425 of outer core 42 around which second U-phase coil 44U2 of induction winding 44 is wound.
- the second V-phase coil 47V2 of the rotor winding 47 is wound between one and the other teeth 484 of the inner core 48 (the second is not shown).
- each of the U-V phase toroidal coils 81 to 84 is wound around the inner core 48 so as to shift to the right in the drawing by 4 teeth in the circumferential direction rather than the outer core 42.
- the four VU-phase toroidal coils 85 to 87 are between the teeth 426, 427, 428 (the fourth is not shown) of the outer core 42 and the inner core 48, respectively.
- the inner core 48 is wound around the inner core 48 so as to shift to the left in the figure by the amount of four teeth.
- four WW-phase toroidal coils 88 and 89 are respectively between teeth 429 and 42A of the outer core 42 (third and fourth are not shown). And between the teeth 489 and 48A (the third and fourth are not shown) of the inner core 48 which is symmetrical inside and outside.
- FIG. 9 (1) is a diagram for explaining the functions of the induction winding 44 and the rotor winding 47 of the first embodiment
- (2) is a diagram for explaining the functions of the toroidal coil group 8 of the second embodiment. is there.
- the first embodiment of FIG. 9 (1) consider a case where an alternating current is applied to the U-phase coil 31 U 1 of the stator winding 31 and a magnetic flux ⁇ is generated in each tooth 321 of the core 32 of the stator 3.
- the magnetic flux ⁇ reaches each tooth 421 of the outer core 42 of the composite rotor 4 beyond the gap G1, interlinks with the U-phase coil 44U1 of the induction winding 44, and branches to magnetic fluxes ⁇ Y11 and ⁇ Y12 at the yoke portion.
- the U-phase coil 44U1 of the induction winding 44 circulates five teeth 421, and an induced electromotive force is generated by interlinking with five magnetic fluxes ⁇ .
- This induced electromotive force is supplied to the first V-phase coil 47V1 of the rotor winding 47 so that a current flows, a magnetic flux ⁇ 2 is formed in each tooth 481 of the inner core 48, and a rotor rotating magnetic field is formed. Further, the magnitude of the rotor rotating magnetic field is proportional to five of the original magnetic flux ⁇ .
- the toroidal coil group 8 of the second embodiment has the same functions as the induction winding 44 and the rotor winding 47 of the first embodiment in that a rotor rotating magnetic field is formed on the inner core 48.
- FIG. 10 is a view in the axial direction showing the configuration of the variation of the multi-rotor electric motor 10 of the second embodiment for an electrical angle of 360 ° in a straight line.
- the UV phase toroidal coils 81 to 84 and the VU phase toroidal coils 85 to 87 can be bent and routed. As a result, the crossing of the coils can be eliminated and an increase in size in the axial direction can be avoided.
- the stator winding 31 is three-phase Y-connected and electrically connected to the inverter device 72 as in the first embodiment.
- the toroidal coil group 8 four UV phase toroidal coils 81 to 84 are sequentially connected in series, and a U-phase terminal 8UT is provided at one end and a U-phase neutral point 8NU is provided at the other end.
- VU-phase toroidal coils 85 to 87 are sequentially connected in series, and a V-phase terminal 8VT is provided at one end and a V-phase neutral point 8NV is provided at the other end.
- WW-phase toroidal coils 88 and 89 are connected in series, and a W-phase terminal 8WT is provided at one end and a W-phase neutral point 8NW is provided at the other end. It is done. And each phase terminal 8UT, 8VT, 8WT of 3 phases is connected, and each phase neutral point 8NU, 8NV, 8NW is connected.
- FIG. 12 is a diagram illustrating a coil configuration for an electrical angle of 360 ° of the stator winding 31 and the toroidal coil group 8 when the stator 3 side is viewed from the rotor 5 side.
- the coil configuration of the upper stator winding 31 in the figure is the same as that of the first embodiment described in FIG. Since the coil configuration of the toroidal coil group 8 is complicated and difficult to see, it is shown again in FIGS.
- FIG. 13 is a diagram for explaining the coil configuration of the UV phase toroidal coils 81 to 84 in the toroidal coil group 8 when the stator 3 side is viewed from the rotor 5 side.
- the conductor coming out of the U-phase terminal 8UT circulates counterclockwise a predetermined number of times by the first UV-phase toroidal coil 81, and then crosses the second UV-phase toroidal coil 82. Then, it circulates clockwise a predetermined number of times and passes over the third UV phase toroidal coil 83. Further, the conductor circulates the third UV phase toroidal coil 83 clockwise a predetermined number of times, and then circulates counterclockwise a predetermined number of times over the fourth UV phase toroidal coil 84. A phase neutral point of 8 NU is reached.
- FIG. 14 is a diagram illustrating the coil configuration of the VU phase toroidal coils 85 to 87 in the toroidal coil group 8 when the stator 3 side is viewed from the rotor 5 side.
- the conductor coming out of the V-phase terminal 8VT circulates counterclockwise a predetermined number of times by the first VU-phase toroidal coil 85, and then crosses the second VU-phase toroidal coil 86. Rotate clockwise a predetermined number of times and pass to the third VU phase toroidal coil 87. Further, the conductor circulates the third VU-phase toroidal coil 87 clockwise a predetermined number of times, and then circulates counterclockwise a predetermined number of times over the fourth VU-phase toroidal coil. A neutral point of 8 NV is reached.
- FIG. 15 is a diagram illustrating the coil configuration of the WW phase toroidal coils 88 and 89 in the toroidal coil group 8 when the stator 3 side is viewed from the rotor 5 side.
- the conductor coming out of the W-phase terminal 8WT circulates counterclockwise a predetermined number of times by the first WW-phase toroidal coil 88, and then passes to the second WW-phase toroidal coil 89. Then, it circulates clockwise a predetermined number of times and passes over the third WW phase toroidal coil. Further, the conductor circulates the third WW phase toroidal coil clockwise a predetermined number of times, and then circulates counterclockwise a predetermined number of times over the fourth WW phase toroidal coil.
- the sex point reaches 8NW.
- the case where coils having different winding directions are mixed in the in-phase coil group is illustrated, and the winding direction of the coils is unified and the connection method between the coils is changed. It may be dealt with by doing.
- the operation of the multi-rotor electric motor 10 of the second embodiment configured as described above is the same as that of the first embodiment described with reference to FIGS. Further, in addition to the effects equivalent to those of the first embodiment, since the toroidal coils 81 to 89 are wound around the outer core 42 and the inner core 48, the holding strength is improved, so that the centrifugal strength strength is improved. Securement is facilitated and manufacturing costs can be reduced.
- FIG. 16 is a cross-sectional view illustrating a coaxial inner / outer arrangement example 11 of the actual configuration of the multiple rotor electric motor 1 of the first embodiment.
- the outer motor unit and the inner motor unit are arranged on the coaxial outer side and the inner side with the axis AX in common.
- FIG. 17 is a cross-sectional view for explaining a tandem arrangement example 12 of an actual configuration of a multi-rotor motor having a motor unit arrangement different from that of the first embodiment.
- the outer motor unit and the inner motor unit are arranged side by side in the direction of the axis AX with the axis AX as a common.
- the stator 3 is fixed to the inner surface of the case 2, and the composite rotor 4 is disposed on the inner diameter side of the stator 3.
- the composite rotor 4 has a cylindrical intermediate shaft 4M extending on both sides in the axis AX direction.
- the intermediate shaft 4M is reduced in diameter on both sides in the direction of the axis AX, and a pair of bearing portions 22 and 23 are disposed between the outer peripheral surfaces of the ends 4M2 and 4M3 on both sides of the reduced diameter and the case 2.
- the intermediate shaft 4M is rotatably supported by the case 2 by the bearing portions 22 and 23.
- a rotor 5 is disposed on the inner diameter side of the composite rotor 4.
- An output shaft 6 extends through the center of the rotor 5.
- the output shaft 6 extends on both sides in the axis AX direction, and both end portions 61 and 62 protrude to the outside of the case 2.
- a pair of bearing portions 24 and 25 are disposed between the outer peripheral surfaces near both end portions 61 and 62 of the output shaft 6 and the inner peripheral surfaces of the end portions 4M2 and 4M3 of the intermediate shaft 4M.
- the output shaft 6 is rotatably supported by the intermediate shaft 4M by the bearing portions 24 and 25.
- the power supply unit 7 is omitted in FIG.
- the rotational speed of the outer motor unit acts on the bearing portions 22, 23, and the relative rotational speed of the inner motor unit acts on the bearing portions 24, 25. That is, the rotational speed acting on the bearing portions 22 to 25 is smaller than the output rotational speed of the output shaft 6 with respect to the case 2, and the stress received is reduced, improving the reliability.
- the stator 30 is fixed to the inner surface of the case 2, and the rotating field portion 41, the outer core 42, and the induction winding 44 of the composite rotor 400 are arranged on the inner diameter side of the stator 30. Is arranged.
- An intermediate shaft 4N is provided in the center of the outer core 42. One side (left side in the figure) of the intermediate shaft 4N in the axis AX direction extends, and one end 4N1 of the intermediate shaft 4N projects to the outside of the case 2.
- a bearing portion 26 is disposed between the outer peripheral surface of the intermediate shaft 4N near the one end portion 4N1 and the case 2.
- the other side of the intermediate shaft 4N in the axis AX direction is expanded to form a bottomed cylindrical portion 4N2.
- An inner core 48 and a rotor winding 47 are disposed on the inner peripheral surface of the bottomed cylindrical portion 4N2.
- the outer core 42 and the inner core 48 of the composite rotor 400 are sufficiently separated from each other, and a magnetic separation part is unnecessary.
- the rotor 50 is disposed on the inner diameter side of the inner core 48 of the composite rotor 400.
- An output shaft 60 extends through the center of the rotor 50.
- One side (the right side in the figure) of the output shaft 60 in the axis line AX extends, and one end 63 thereof projects outside the case 2.
- a bearing portion 27 is disposed between the outer peripheral surface of the output shaft 60 near the one end portion 63 and the case 2.
- the output shaft 60 also extends to the other side in the axis AX direction (left side in the figure), and the bearing portion 28 is disposed between the other end portion 64 and the bottomed cylindrical portion 4N2 of the intermediate shaft 4N. .
- the intermediate shaft 4N and the output shaft 60 are rotatably supported by the case 2 by the cooperation of the bearing portions 26 to 28.
- the power source unit 7 is omitted in FIG.
- the rotational speed of the outer motor unit acts on the bearing portion 26, and the relative rotational speed of the inner motor unit acts on the bearing portion 28.
- the bearing portion 27 is subjected to a large rotational speed obtained by adding the rotational speed of the output shaft 60 with respect to the case 2, that is, the rotational speeds of both motor units. Therefore, particularly when it is desired to increase the output rotational speed, it is preferable to improve the performance and reliability of the bearing portion 27 by measures such as direct injection of lubricating oil.
- the manufacturing dimensions of the outer motor unit and the inner motor unit are similar, it is relatively easy to make the output characteristics of both motor units uniform.
- a rotation angle sensor that detects the rotation phase of the composite rotors 4, 40, 400 and the output shafts 6, 60 is provided, and the inverter control unit 73 performs control while referring to the rotation phase. It is preferable.
- positioned the stator and rotor of each motor unit in coaxial inside / outside was shown, it is not limited to this, The motor unit of the structure which arranged the stator and the rotor in the axial direction may be sufficient.
- the composite rotor 4 can be configured such that external torque can be input to and interrupted from the composite rotor 4 or the rotor 5.
- the torque generated in the multi-rotor motor 1 can be output from the output shaft 7 in addition to the external torque.
- a mechanism for detachably fixing the composite rotor 4 to the case can be provided.
- a motor unit is formed between the stator and the first composite rotor, between the first and second composite rotors, and between the second composite rotor and the rotor, and the stator unit is connected to the stator from the power supply unit. It is possible to obtain a large output rotational speed with the rotor by sequentially applying three alternating currents with different frequencies to the windings, generating an induced electromotive force sequentially with the two composite rotors, and adding the rotational speed. .
- the present invention can be variously modified and applied.
- the multi-rotor electric motor of the present invention can be used for a drive source of a hybrid vehicle or an electric vehicle, and is particularly suitable for an application that requires high-speed rotation.
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Abstract
This multiple rotor-type electric motor is provided with: a stator which comprises a stator winding that forms a stator rotating magnetic field, and is affixed to a case: a composite rotor which comprises a rotating field magnet part that generates torque by electromagnetic interaction with the stator rotating magnetic field, an inductive winding that generates induced electromotive force by electromagnetic inductive action with the stator rotating magnetic field, and a rotor winding that is electrically connected to the inductive winding and forms a rotor rotating magnetic field in the same rotation direction as the stator rotating magnetic field, and is axially supported to rotate freely; a rotor which comprises an output field magnet part that generates torque by electromagnetic interaction with the rotor rotating magnetic field, and is rotatable at higher speed than the composite rotor; an output shaft which is joined to the rotor and axially supported to rotate freely; and a power supply part which overlappingly passes two alternating currents having different frequencies through the stator winding. Consequently, a plurality of motor units can be integrally combined and driven by a single power supply part, and higher-speed rotation, reduced size, lower cost, and freedom from maintenance can be achieved.
Description
本発明は電動機に関し、より詳細には、複数の回転子を有する多重回転子形電動機に関する。
The present invention relates to an electric motor, and more particularly to a multi-rotor electric motor having a plurality of rotors.
ハイブリッド車両では、駆動源としてエンジンおよび電動機を搭載し、エンジンによる駆動を電動機でアシストしたり、電動機単独で駆動したりできるようになっている。電動機には三相交流電動機が用いられ、インバータ装置で通電制御することにより、走行速度を可変に制御するのが一般的である。この種の車載電動機として、複数の回転子を有する多重回転子形電動機が提案されている。
Hybrid vehicles are equipped with an engine and an electric motor as drive sources, and can be driven by the electric motor or driven by the electric motor alone. A three-phase AC motor is used as the electric motor, and the running speed is generally variably controlled by energization control with an inverter device. As this type of in-vehicle electric motor, a multiple rotor electric motor having a plurality of rotors has been proposed.
例えば、特許文献1に開示される車両用変速装置は、エンジンに連結され少なくとも発電機として機能する第1回転電機と、車輪軸に連結され少なくとも電動機として機能する第2回転電機と、第1および第2回転電機をそれぞれ駆動する第1および第2駆動手段と、制御手段とを備え、制御手段より車両発進時により大きなトルクを発生することを目的としている。そして、特許文献1の図1に示される第1実施形態には、第1および第2回転電機を別体で備え、それぞれ別のインバータが接続される態様が開示されている。また、図8に示される第3実施形態には、第1および第2回転電機部で構成される2重ロータ構造の態様が開示されている。第3実施形態では、エンジンに連結され三相巻線が巻回された第1回転子から電力を取り出すためにブラシが用いられている。特許文献1の各態様では、車両発進時において、大きなクリープトルクを発生することができる、とされている。
For example, a vehicle transmission disclosed in Patent Document 1 includes a first rotating electrical machine that is connected to an engine and functions as at least a generator, a second rotating electrical machine that is coupled to a wheel shaft and functions as at least an electric motor, The first and second driving means for driving the second rotating electrical machine and a control means are provided, and an object is to generate a larger torque when the vehicle starts from the control means. And 1st Embodiment shown by FIG. 1 of patent document 1 is provided with the 1st and 2nd rotary electric machine by another body, and the aspect to which another inverter is each connected is disclosed. Further, the third embodiment shown in FIG. 8 discloses an aspect of a double rotor structure constituted by the first and second rotating electrical machines. In the third embodiment, a brush is used to extract electric power from a first rotor that is connected to an engine and wound with a three-phase winding. In each aspect of patent document 1, it is supposed that a big creep torque can be generated when the vehicle starts.
また、特許文献2の電気式無段変速装置は、2重回転子構造を有する主モータと、出力軸のトルクを加減する副モータと、主および副インバータとを備えている。主モータは、エンジンに直結して回転する第1回転子と、車軸を駆動する第2回転子とで構成されている。第1回転子には三相巻線が設けられてインバータから電流を供給する旨が記載されており、特許文献1のブラシに相当する部材を備えることが推定される。
The electric continuously variable transmission of Patent Document 2 includes a main motor having a double rotor structure, a sub motor that adjusts the torque of the output shaft, and a main and sub inverter. The main motor includes a first rotor that is directly connected to the engine and rotates, and a second rotor that drives the axle. It is described that the first rotor is provided with a three-phase winding and current is supplied from an inverter, and it is estimated that a member corresponding to the brush of Patent Document 1 is provided.
ところで、特許文献1の第1実施形態では、2つの回転電機(モータユニット)を別体で備えるので、装置が大形化してコストも高くなる。このため、2つの回転電機を一体化して、小形化および低コスト化を図った2重回転子構造の電動機が特許文献1の第3実施形態および特許文献2に開示されているが、回転している巻線に電源供給するためにブラシなどの回転給電部を設けることになる。したがって、回転給電部のスペース分だけ小形化の効果が減少する。また、経年使用による回転給電部の摩耗や疲労に対してメンテナンスが必要になりランニングコストがかさむ。さらに、特許文献1および2では、2つの回転電機のそれぞれに電源用のインバータが設けられており、製造コストも増加している。
By the way, in the first embodiment of Patent Document 1, since the two rotating electric machines (motor units) are provided separately, the apparatus becomes large and the cost increases. For this reason, a double rotor structure electric motor that integrates two rotating electric machines to reduce the size and cost is disclosed in the third embodiment of Patent Document 1 and Patent Document 2, but rotates. In order to supply power to the windings, a rotating power supply unit such as a brush is provided. Therefore, the effect of downsizing is reduced by the space of the rotary power feeding unit. In addition, maintenance is required for wear and fatigue of the rotating power feeding portion due to use over time, which increases running costs. Further, in Patent Documents 1 and 2, an inverter for power supply is provided in each of the two rotating electric machines, and the manufacturing cost is also increased.
本発明は、上記背景技術の問題点に鑑みてなされたもので、複数のモータユニットを一体的に組み合わせ単一の電源部で駆動することにより、高速回転化、小形化、低コスト化、およびメンテナンスフリーを実現した多重回転子形電動機を提供することを解決すべき課題とする。
The present invention has been made in view of the problems of the above-described background art, and by combining a plurality of motor units and driving them with a single power supply unit, high-speed rotation, downsizing, cost reduction, and An object to be solved is to provide a multi-rotor motor that realizes maintenance-free operation.
上記課題を解決する請求項1に係る多重回転子形電動機の発明は、固定子回転磁界を形成する固定子巻線を有してケースに固定された固定子と、前記固定子回転磁界との電磁相互作用によりトルクを生起する回転界磁部および、前記固定子回転磁界との電磁誘導作用により誘導起電力を生起する誘導巻線および、前記誘導巻線に電気接続されて前記固定子回転磁界と同じ回転方向の回転子回転磁界を形成する回転子巻線を有し、前記ケースに回転自在に軸承された複合回転子と、前記回転子回転磁界との電磁相互作用によりトルクを生起する出力界磁部を有し、前記複合回転子と同じ方向にかつ前記複合回転子よりも高速で回転可能な回転子と、前記回転子に結合され、前記ケースまたは前記複合回転子に回転自在に軸承された出力軸と、前記固定子巻線に周波数の異なる二つの交流電流を重累して通電する電源部と、を備える。
The invention of a multi-rotor electric motor according to claim 1 for solving the above-described problem is provided by a stator having a stator winding for forming a stator rotating magnetic field and fixed to a case, and the stator rotating magnetic field. A rotating field part that generates torque by electromagnetic interaction, an induction winding that generates an induced electromotive force by electromagnetic induction action with the stator rotating magnetic field, and the stator rotating magnetic field that is electrically connected to the induction winding Output that generates torque by electromagnetic interaction between the rotor rotating magnetic field and a composite rotor that is rotatably supported by the case and has a rotor winding that forms a rotor rotating magnetic field in the same rotational direction as A rotor having a field part and capable of rotating in the same direction as the composite rotor and at a higher speed than the composite rotor; and coupled to the rotor and rotatably supported by the case or the composite rotor; Output shaft, Two different alternating current frequencies in serial stator winding by weight cumulatively and a power supply unit for energizing.
請求項2に係る発明は、請求項1において、前記電源部が前記固定子巻線に通電する周波数f1の第1交流電流により形成される第1固定子回転磁界の磁束Φ1、回転数n1、および前記固定子巻線と前記回転界磁部との間のトルクT1とし、周波数f2の第2交流電流により形成される第2固定子回転磁界の磁束Φ2、回転数n2、および前記固定子巻線と前記回転界磁部との間のトルクT2とし、前記回転子巻線と前記出力界磁部との間のトルクToutとしたとき、前記磁束Φ1<前記磁束Φ2、かつ前記トルクT1<前記トルクT2、かつ(前記トルクT2-前記トルクT1)>前記トルクToutであり、さらに、前記回転数n1<前記回転数n2である。
According to a second aspect of the present invention, in the first aspect, the magnetic flux Φ1 of the first stator rotating magnetic field formed by the first alternating current of the frequency f1 that is supplied to the stator winding by the power source unit, the rotational speed n1, And a torque T1 between the stator winding and the rotating field portion, a magnetic flux Φ2 of a second stator rotating magnetic field formed by a second alternating current having a frequency f2, a rotational speed n2, and the stator winding When the torque T2 between the wire and the rotating field part is the torque Tout between the rotor winding and the output field part, the magnetic flux Φ1 <the magnetic flux Φ2 and the torque T1 <the above The torque T2 and (the torque T2−the torque T1)> the torque Tout, and the rotational speed n1 <the rotational speed n2.
請求項3に係る発明は、請求項2において、前記第1固定子回転磁界と前記第2固定子回転磁界の回転方向が同じ場合は、前記回転数n1<前記回転数n2であり、前記第1固定子回転磁界と前記第2固定子回転磁界の回転方向が異なる場合は前記回転数n1を負値で表し、0<(前記回転数n1の絶対値)<(2×前記回転数n2)である。
According to a third aspect of the present invention, in the second aspect, when the rotation direction of the first stator rotating magnetic field and the second stator rotating magnetic field is the same, the rotation speed n1 <the rotation speed n2 and When the rotation direction of the first stator rotating magnetic field and the second stator rotating magnetic field is different, the rotation speed n1 is expressed as a negative value, and 0 <(the absolute value of the rotation speed n1) <(2 × the rotation speed n2). It is.
請求項4に係る発明は、請求項1~3のいずれか一項において、前記複合回転子の前記回転界磁部および前記誘導巻線が有するコアと、前記回転子巻線が有するコアとの間を磁気的に分離する磁気分離部を有する。
According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, there is provided a core included in the rotating field portion of the composite rotor and the induction winding, and a core included in the rotor winding. It has a magnetic separation part that magnetically separates them.
請求項5に係る発明は、請求項1~4のいずれか一項において、前記固定子の前記固定子巻線および前記複合回転子の前記回転界磁部で構成される第1モータユニットと、前記複合回転子の前記回転子巻線および前記回転子の前記出力界磁部で構成される第2モータユニットとは、回転数とトルクとの関係を示す出力特性が互いにほぼ同一である。
The invention according to claim 5 is the first motor unit according to any one of claims 1 to 4, comprising the stator winding of the stator and the rotating field portion of the composite rotor; The second motor unit composed of the rotor winding of the composite rotor and the output field portion of the rotor have substantially the same output characteristics indicating the relationship between the rotational speed and torque.
請求項6に係る発明は、請求項5において、前記第2モータユニットは、前記第1モータユニットの回転数の2倍まで出力可能である。
According to a sixth aspect of the present invention, in the fifth aspect, the second motor unit can output up to twice the number of rotations of the first motor unit.
請求項7に係る発明は、請求項1~6のいずれか一項において、前記固定子の前記固定子巻線、前記複合回転子の前記誘導巻線および前記回転子巻線は全て三相結線されており、かつ、前記誘導巻線と前記回転子巻線とは二相が入れ替えられて電気接続されている。
The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the stator winding of the stator, the induction winding and the rotor winding of the composite rotor are all three-phase connected. In addition, the induction winding and the rotor winding are electrically connected with two phases interchanged.
請求項8に係る発明は、請求項1~7のいずれか一項において、前記固定子の前記固定子巻線、前記複合回転子の前記誘導巻線および前記回転子巻線は、すべて同じコイル構成とされかつ周方向の相の配列順も一致している。
The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the stator winding of the stator, the induction winding and the rotor winding of the composite rotor are all the same coil. The arrangement order of the phases in the circumferential direction also matches.
請求項9に係る発明は、請求項8において、前記複合回転子の前記誘導巻線および前記回転子巻線は三相結線されており、周方向に関する前記複合回転子の前記誘導巻線の三相の位置と前記回転子巻線の三相の位置とは一致する。
The invention according to claim 9 is the invention according to claim 8, wherein the induction winding and the rotor winding of the composite rotor are three-phase connected, and three of the induction windings of the composite rotor in the circumferential direction are connected. The phase position and the three-phase position of the rotor winding coincide.
請求項10に係る発明は、請求項6~9のいずれか一項において、前記複合回転子の前記誘導巻線および前記回転子巻線の中でそれぞれY結線またはΔ結線を行って各相端子を構成し、前記誘導巻線および前記回転子巻線の対応する各相端子のいずれか二相を入れ替えて電気接続する。
The invention according to a tenth aspect is the invention according to any one of the sixth to ninth aspects, wherein each of the phase terminals is configured by performing Y-connection or Δ-connection in the induction winding and the rotor winding of the composite rotor. And any two phases of the corresponding phase terminals of the induction winding and the rotor winding are switched and electrically connected.
請求項11に係る発明は、請求項1~6のいずれか一項において、前記複合回転子の前記誘導巻線および前記回転子巻線に代えてトロイダルコイル群を用いる。
The invention according to claim 11 is the invention according to any one of claims 1 to 6, wherein a toroidal coil group is used instead of the induction winding and the rotor winding of the composite rotor.
請求項1に係る多重回転子形電動機の発明では、固定子の固定子巻線および複合回転子の回転界磁部で第1モータユニットが構成され、複合回転子の回転子巻線および回転子の出力界磁部で第2モータユニットが構成される。第1モータユニットでは、固定子の固定子巻線と複合回転子の回転界磁部との電磁相互作用によりトルクが発生するので、周波数の異なる二つの交流電流によって形成される固定子回転磁界の一方に同期して複合回転子が回転する。すると、複合回転子上の誘導巻線では、同期している回転磁界は変化せず、他方の回転磁界のみが複合回転子の回転数を含んで変化する。これにより、誘導巻線で誘導起電力が生起し、回転子巻線との電気接続を適正化することで、回転子巻線は複合回転子の回転と同じ回転方向の回転子回転磁界を形成することができる。つまり、第2モータユニットでは、回転している複合回転子上でさらに高速回転する回転子回転磁界を形成することができる。したがって、回転子回転磁界に同期して回転する回転子および出力軸を高速回転化でき、特に電源部の周波数に由来する回転数よりも大きな出力回転数を得ることができる。なお、電源部の周波数に由来する回転数とは、一般的な電動機で電源部の周波数により定まる同期周波数を意味し、本発明では、請求項2の回転数n1および回転数n2のうち大きい側とする。
In the invention of the multiple rotor type electric motor according to claim 1, the first motor unit is composed of the stator winding of the stator and the rotating field portion of the composite rotor, and the rotor winding and the rotor of the composite rotor. The second motor unit is composed of the output field portion. In the first motor unit, torque is generated by the electromagnetic interaction between the stator winding of the stator and the rotating field portion of the composite rotor, so that the stator rotating magnetic field formed by two alternating currents having different frequencies is generated. The composite rotor rotates in synchronization with one side. Then, in the induction winding on the composite rotor, the synchronized rotating magnetic field does not change, and only the other rotating magnetic field changes including the rotational speed of the composite rotor. As a result, an induced electromotive force is generated in the induction winding, and the rotor winding forms a rotor rotating magnetic field in the same rotation direction as the rotation of the composite rotor by optimizing the electrical connection with the rotor winding. can do. That is, in the second motor unit, it is possible to form a rotor rotating magnetic field that rotates at a higher speed on the rotating composite rotor. Therefore, the rotor and the output shaft that rotate in synchronization with the rotor rotating magnetic field can be rotated at a high speed, and in particular, an output rotational speed larger than the rotational speed derived from the frequency of the power supply unit can be obtained. The number of rotations derived from the frequency of the power supply unit means a synchronization frequency determined by the frequency of the power supply unit in a general electric motor. In the present invention, the larger one of the rotation number n1 and the rotation number n2 of claim 2 And
また、複数のモータユニットを別々に設けるのではなく複合一体化しており、加えて誘導巻線により非接触で誘導起電力を発生できブラシなどの回転給電部が不要であることから、多重回転子形電動機を小形化でき、製造コストは低廉になる。さらに、電源部を単一のインバータ装置で実現できることから、製造コストは一層低廉になる。また、回転給電部が不要であることから、メンテナンスフリーを実現でき、ランニングコストも低廉になる。
In addition, a plurality of motor units are not provided separately, but are combined and integrated. In addition, an induction electromotive force can be generated in a non-contact manner by an induction winding, and a rotating power supply unit such as a brush is unnecessary. The size of the electric motor can be reduced, and the manufacturing cost is reduced. Furthermore, since the power supply unit can be realized by a single inverter device, the manufacturing cost is further reduced. In addition, since the rotating power feeding unit is unnecessary, maintenance-free operation can be realized and the running cost can be reduced.
請求項2に係る発明では、第1および第2交流電流のうち、大きな磁束Φ2で大きなトルクT2を発生する第2交流電流の回転磁界に同期して複合回転子が回転数n2で回転する。ここで、回転子巻線と出力界磁部との間のトルクToutが(トルクT2-トルクT1)よりも小さいので、複合回転子の回転子回転磁界に同期して回転子および出力軸が高速回転する際に複合回転子の回転がふらつかず、出力軸の出力回転数が安定する。
In the invention according to claim 2, the composite rotor rotates at the rotational speed n2 in synchronization with the rotating magnetic field of the second alternating current that generates the large torque T2 with the large magnetic flux Φ2 among the first and second alternating currents. Here, since the torque Tout between the rotor winding and the output field part is smaller than (torque T2-torque T1), the rotor and the output shaft are operated at high speed in synchronization with the rotor rotating magnetic field of the composite rotor. When rotating, the rotation of the composite rotor does not fluctuate, and the output rotation speed of the output shaft is stabilized.
また、回転数n1が回転数n2よりも小さいので、複合回転子上の誘導巻線では、磁束Φ1の回転磁界が逆回転方向に作用する。これにより、誘導巻線では電源部とは逆相の誘導起電力が発生し、回転子巻線との電気接続を適正化することで、複合回転子の回転と同じ回転方向の回転子回転磁界を形成することができる。したがって、回転子および出力軸の回転数を複合回転子の回転数n2よりも高速化でき、電源部の周波数に由来する回転数n1、n2よりも大きな出力回転数を得ることができる。
Further, since the rotation speed n1 is smaller than the rotation speed n2, the rotating magnetic field of the magnetic flux Φ1 acts in the reverse rotation direction in the induction winding on the composite rotor. As a result, inductive electromotive force is generated in the induction winding in a phase opposite to that of the power supply unit, and the rotor rotating magnetic field in the same rotational direction as the rotation of the composite rotor is obtained by optimizing the electrical connection with the rotor winding. Can be formed. Therefore, the rotational speed of the rotor and the output shaft can be made higher than the rotational speed n2 of the composite rotor, and an output rotational speed larger than the rotational speeds n1 and n2 derived from the frequency of the power supply unit can be obtained.
請求項3に係る発明では、第1固定子回転磁界と第2固定子回転磁界の回転方向が異なる場合に回転数n1を負値で表す。これは、周波数の異なる第1および第2交流電流の相順が相互に異なるように制御することで実現できる。この場合、0<(回転数n1の絶対値)<(2×回転数n2)であることが好ましく、電源部の周波数に由来する回転数n1、n2の2~3倍の出力回転数を得ることができる。
In the invention according to claim 3, when the rotation directions of the first stator rotating magnetic field and the second stator rotating magnetic field are different, the rotation speed n1 is expressed as a negative value. This can be realized by controlling the phase orders of the first and second alternating currents having different frequencies to be different from each other. In this case, it is preferable that 0 <(absolute value of the rotational speed n1) <(2 × rotational speed n2), and an output rotational speed 2 to 3 times the rotational speeds n1 and n2 derived from the frequency of the power supply unit is obtained. be able to.
例えば、回転数n1が負値で0に近づくと、回転数n2で回転している複合回転子上の誘導巻線からみて、磁束Φ1の回転磁界の回転数Naは、Na=n1-n2≒―n2となる。これによって誘導巻線に生じる誘導起電力の相順を反転して回転子巻線に加えると、回転数Naは反転して(符号を変えて)加算される。つまり、出力軸回転数Noutは、Nout=n2+(-Na)≒2×n2となる。この出力軸回転数Noutは、電源部の周波数に由来する回転数n2の約2倍になっている。また、例えば、回転数n1=―n2であると、複合回転子上の誘導巻線からみた磁束Φ1の回転磁界の回転数Na=n1-n2=―2×n2となる。したがって、出力軸回転数Nout=n2+(-Na)=3×n2となり、電源部の周波数に由来する回転数n2の3倍になる。さらに、例えば、回転数n1=―2×n2に近づくと、複合回転子上の誘導巻線からみた磁束Φ1の回転磁界の回転数Na=n1-n2≒―3×n2となる。したがって、出力軸回転数Nout=n2+(-Na)≒4×n2となり、電源部の周波数に由来する回転数n1(≒2×n2)の絶対値の約2倍になる。
For example, when the rotational speed n1 is a negative value and approaches 0, the rotational speed Na of the rotating magnetic field of the magnetic flux Φ1 is Na = n1-n2≈ as seen from the induction winding on the composite rotor rotating at the rotational speed n2. -N2. As a result, when the phase sequence of the induced electromotive force generated in the induction winding is reversed and applied to the rotor winding, the rotation speed Na is reversed (changed in sign) and added. That is, the output shaft rotation speed Nout is Nout = n2 + (− Na) ≈2 × n2. This output shaft rotational speed Nout is approximately twice the rotational speed n2 derived from the frequency of the power supply section. Further, for example, when the rotational speed n1 = −n2, the rotational speed Na = n1−n2 = −2 × n2 of the rotating magnetic field of the magnetic flux Φ1 viewed from the induction winding on the composite rotor. Therefore, the output shaft rotational speed Nout = n2 + (− Na) = 3 × n2, which is three times the rotational speed n2 derived from the frequency of the power supply unit. Further, for example, when the rotation speed approaches n1 = −2 × n2, the rotation speed Na = n1−n2≈−3 × n2 of the rotating magnetic field of the magnetic flux Φ1 viewed from the induction winding on the composite rotor. Therefore, the output shaft rotational speed Nout = n2 + (− Na) ≈4 × n2, which is about twice the absolute value of the rotational speed n1 (≈2 × n2) derived from the frequency of the power supply unit.
請求項4に係る発明では、複合回転子の回転界磁部および誘導巻線が有するコアと、回転子巻線が有するコアとの間を磁気的に分離する磁気分離部を有している。したがって、複合回転子内における2つのコアの間の磁気的な干渉が抑制されて第1および第2モータユニットが互いに独立して動作し、多重回転子形電動機を高効率化および、動作安定化できる。
The invention according to claim 4 further includes a magnetic separation unit that magnetically separates the core of the rotor winding and the core of the rotor winding and the core of the rotor winding of the composite rotor. Therefore, magnetic interference between the two cores in the composite rotor is suppressed, and the first and second motor units operate independently of each other, so that the multi-rotor motor is highly efficient and stable. it can.
請求項5に係る発明では、固定子の固定子巻線および複合回転子の回転界磁部で構成される第1モータユニットと、複合回転子の回転子巻線および回転子の出力界磁部で構成される第2モータユニットとは、回転数とトルクとの関係を示す出力特性が互いにほぼ同一になっている。したがって、高速の出力回転数を得るために第1および第2モータユニットで合理的に回転数を分担でき、製造コストが低廉になる。
In the invention according to claim 5, the first motor unit composed of the stator winding of the stator and the rotating field portion of the composite rotor, and the rotor winding of the composite rotor and the output field portion of the rotor The output characteristics indicating the relationship between the rotational speed and the torque are substantially the same as those of the second motor unit constituted by Accordingly, the first and second motor units can rationally share the rotational speed in order to obtain a high-speed output rotational speed, and the manufacturing cost is reduced.
請求項6に係る発明では、第2モータユニットは、第1モータユニットの回転数の2倍まで出力可能とされている。したがって、本発明で上限となる電源部の周波数に由来する回転数の3倍の出力回転数を実現できる。
In the invention according to claim 6, the second motor unit can output up to twice the number of rotations of the first motor unit. Therefore, it is possible to realize an output rotational speed that is three times the rotational speed derived from the frequency of the power supply unit, which is the upper limit in the present invention.
請求項7に係る発明では、固定子の固定子巻線、複合回転子の誘導巻線および回転子巻線はそれぞれ三相結線されており、かつ、誘導巻線と回転子巻線とは二相が入れ替えられて電気接続されている。本発明は、三相巻線を用いて構成することができ、従来の三相交流電動機や電源部としての三相インバータ装置の技術を応用できる。したがって、多重回転子形電動機の動作が安定し、経済性にも優れる。また、誘導巻線と回転子巻線とで二相を入れ替えることにより容易に電気接続を適正化できる。
In the invention according to claim 7, the stator winding of the stator, the induction winding and the rotor winding of the composite rotor are respectively connected in three phases, and the induction winding and the rotor winding are two The phases are switched and electrically connected. The present invention can be configured using three-phase windings, and can be applied to the technology of a conventional three-phase AC motor or a three-phase inverter device as a power supply unit. Therefore, the operation of the multi-rotor motor is stable and economical. Also, the electrical connection can be easily optimized by switching two phases between the induction winding and the rotor winding.
請求項8に係る発明では、固定子の固定子巻線、複合回転子の誘導巻線および回転子巻線は、すべて同じコイル構成とされかつ周方向の相の配列順も一致している。さらに、請求項9に係る発明では、複合回転子の誘導巻線および回転子巻線は三相結線されており、周方向に関する複合回転子の誘導巻線の三相の位置と回転子巻線の三相の位置とは一致している。これにより、固定子巻線、誘導巻線、および回転子巻線のコイル構成やコイル間の接続方法が統一されて分かりやすくかつ製造作業も容易となり、製造コストを削減できる。
In the invention according to claim 8, the stator winding of the stator, the induction winding of the composite rotor, and the rotor winding all have the same coil configuration, and the arrangement order of the phases in the circumferential direction also matches. Furthermore, in the invention according to claim 9, the induction winding and the rotor winding of the composite rotor are three-phase connected, and the three-phase position of the induction winding of the composite rotor in the circumferential direction and the rotor winding The position of the three phases is the same. As a result, the coil configuration of the stator winding, the induction winding, and the rotor winding and the connection method between the coils are unified so that the manufacturing work can be easily performed and the manufacturing cost can be reduced.
請求項10に係る発明では、複合回転子の誘導巻線および回転子巻線の中でそれぞれY結線またはΔ結線を行って各相端子を構成し、誘導巻線および回転子巻線の対応する各相端子のいずれか二相を入れ替えて電気接続している。これにより、容易に電気接続を適正化でき、高速の出力回転数を得ることができる。
In the invention according to claim 10, each phase terminal is configured by performing Y connection or Δ connection in the induction winding and the rotor winding of the composite rotor, and the induction winding and the rotor winding correspond to each other. Two phases of each phase terminal are switched and electrically connected. Thereby, electrical connection can be easily optimized and high-speed output rotation speed can be obtained.
請求項11に係る発明では、複合回転子の誘導巻線および回転子巻線に代えてトロイダルコイル群を用いるようにしている。トロイダルコイル群を構成する各トロイダルコイルは、固定子回転磁界と鎖交して電磁誘導作用により誘導起電力を生起するとともに、誘導起電力によって電流が流れ回転子回転磁界を形成することができる。つまり、各トロイダルコイルは誘導巻線および回転子巻線を兼ねることができ、請求項1~6と同様の効果が生じる。さらに、コイルがコアに保持される保持強度が向上するので、コイルの耐遠心力強度の確保が容易となり、製造コストを低減できる。
In the invention according to claim 11, a toroidal coil group is used in place of the induction winding and the rotor winding of the composite rotor. Each toroidal coil constituting the toroidal coil group can generate an induced electromotive force by an electromagnetic induction effect linked to the stator rotating magnetic field, and a current flows through the induced electromotive force to form a rotor rotating magnetic field. That is, each toroidal coil can serve as both an induction winding and a rotor winding, and the same effects as in claims 1 to 6 are produced. Furthermore, since the holding strength with which the coil is held by the core is improved, it is easy to secure the anti-centrifugal strength of the coil, and the manufacturing cost can be reduced.
本発明の第1実施形態の多重回転子形電動機について、図1~図6を参考にして説明する。図1は、第1実施形態の多重回転子形電動機1の構成を概念的に説明する断面図である。第1実施形態の多重回転子形電動機1は、軸線AXを中心とする概ね軸対称形状であり、ケース2、固定子3、複合回転子4、回転子5、出力軸6、電源部7などで構成されている。また、複合回転子4は、回転界磁部41、誘導巻線44、回転子巻線47などで構成されている。図1で、固定子3および複合回転子4は、軸線AXの片側半分のみが示されている。固定子3の固定子巻線31および複合回転子4の回転界磁部41でアウターモータユニットが構成され、複合回転子4の回転子巻線47および回転子5の出力界磁部51でインナーモータユニットが構成されている。アウターモータユニットおよびインナーモータユニットは、回転数とトルクとの関係を示す出力特性が互いにほぼ同一になるように構成されている。
The multi-rotor electric motor according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view conceptually illustrating the configuration of a multi-rotor motor 1 of the first embodiment. The multi-rotor motor 1 of the first embodiment has a generally axisymmetric shape centered on the axis AX, and includes a case 2, a stator 3, a composite rotor 4, a rotor 5, an output shaft 6, a power supply unit 7, and the like. It consists of The composite rotor 4 includes a rotating field portion 41, an induction winding 44, a rotor winding 47, and the like. In FIG. 1, only one half of the axis AX is shown for the stator 3 and the composite rotor 4. The stator winding 31 of the stator 3 and the rotating field portion 41 of the composite rotor 4 constitute an outer motor unit, and the rotor winding 47 of the composite rotor 4 and the output field portion 51 of the rotor 5 serve as an inner motor unit. A motor unit is configured. The outer motor unit and the inner motor unit are configured such that output characteristics indicating the relationship between the rotational speed and the torque are substantially the same.
固定子3は、ケース2の内周面に固定されている。固定子3は、略円筒状で電磁鋼板を積層して構成したコア32を有し、コア32に形成された凸状のティースに固定子巻線31が巻回形成されている。固定子巻線31は、三相それぞれ複数個のコイルからなり、交流電流が通電されると固定子回転磁界を形成するように配置されている。
The stator 3 is fixed to the inner peripheral surface of the case 2. The stator 3 has a substantially cylindrical core 32 formed by laminating electromagnetic steel plates, and a stator winding 31 is wound around a convex tooth formed on the core 32. The stator winding 31 is composed of a plurality of coils for each of the three phases, and is arranged so as to form a stator rotating magnetic field when an alternating current is applied.
複合回転子4は、固定子3の内径側に配置され、図略の軸受け部によりケース2に回転自在に軸承されている。複合回転子4は、外径側に略円筒状で電磁鋼板を積層して構成した外側コア42を有し、外側コア42に形成された凸状のティースに誘導巻線44が巻回形成されている。誘導巻線44は、三相それぞれ複数個のコイルからなり、固定子巻線31が形成した固定子回転磁界との電磁誘導作用により誘導起電力を生起するようになっている。また、外側コア42には界磁磁石が埋め込まれ、N極とS極が周方向に交互に配置されて回転界磁部41が形成されている。回転界磁部41は、固定子巻線31が形成する固定子回転磁界との電磁相互作用によりトルクを生起するようになっている。
The composite rotor 4 is disposed on the inner diameter side of the stator 3 and is rotatably supported on the case 2 by a bearing portion (not shown). The composite rotor 4 has an outer core 42 formed by laminating electromagnetic steel plates in a substantially cylindrical shape on the outer diameter side, and an induction winding 44 is wound around a convex tooth formed on the outer core 42. ing. The induction winding 44 is composed of a plurality of coils for each of the three phases, and generates an induced electromotive force by an electromagnetic induction action with the stator rotating magnetic field formed by the stator winding 31. In addition, a field magnet is embedded in the outer core 42, and a rotating field portion 41 is formed by alternately arranging N poles and S poles in the circumferential direction. The rotating field portion 41 generates torque by electromagnetic interaction with the stator rotating magnetic field formed by the stator winding 31.
一方、複合回転子4は、内径側に略円筒状で電磁鋼板を積層して構成した内側コア48を有し、内側コア48に形成された凸状のティースに回転子巻線47が巻回形成されている。内側コア48と外側コア42の間には、両コア48、42を磁気的に分離する磁気分離部45が設けられている。磁気分離部45は、例えば、非磁性材料を用いて構成することができる。あるいは、内側コア42および外側コア48のヨーク幅を十分広くして相互の磁気漏洩を抑制するようにしてもよい。磁気分離部45により、回転界磁部41および誘導巻線44と、回転子巻線47とが磁気的に干渉せず互いに独立して動作するようになっている。
On the other hand, the composite rotor 4 has an inner core 48 formed by laminating electromagnetic steel plates in a substantially cylindrical shape on the inner diameter side, and the rotor winding 47 is wound around the convex teeth formed on the inner core 48. Is formed. Between the inner core 48 and the outer core 42, a magnetic separation portion 45 that magnetically separates both the cores 48, 42 is provided. The magnetic separation unit 45 can be configured using, for example, a nonmagnetic material. Alternatively, the yoke widths of the inner core 42 and the outer core 48 may be sufficiently widened to suppress mutual magnetic leakage. The magnetic separation unit 45 allows the rotating field unit 41 and the induction winding 44 and the rotor winding 47 to operate independently of each other without magnetic interference.
回転子巻線47は、三相それぞれ複数個のコイルからなり、接続リード49により誘導巻線44に電気接続されている。誘導巻線44に生起した誘導起電力により回転子巻線47に電流が流れ、複合回転子4の回転と同じ回転方向の回転子回転磁界を形成するように、接続リード49の結線が適正化されている。
The rotor winding 47 is composed of a plurality of coils for each of the three phases, and is electrically connected to the induction winding 44 by connection leads 49. The connection lead 49 is properly wired so that a current flows through the rotor winding 47 due to the induced electromotive force generated in the induction winding 44 and forms a rotor rotating magnetic field in the same rotational direction as the rotation of the composite rotor 4. Has been.
回転子5は、複合回転子4の内径側に配置されている。回転子5は、略円筒状で電磁鋼板を積層して構成したコア52を有している。コア52内には界磁磁石が埋め込まれて、N極とS極が周方向に交互に配置されて出力界磁部51が形成されている。出力界磁部51は、回転子巻線47が形成した回転子回転磁界との電磁相互作用によりトルクを生起するようになっている。このトルクにより、回転子5は、複合回転子4と同じ方向にかつ複合回転子4よりも高速で回転可能となっている。
The rotor 5 is disposed on the inner diameter side of the composite rotor 4. The rotor 5 has a core 52 formed by laminating electromagnetic steel plates in a substantially cylindrical shape. A field magnet is embedded in the core 52, and an output field portion 51 is formed by alternately arranging N poles and S poles in the circumferential direction. The output field portion 51 generates torque by electromagnetic interaction with the rotor rotating magnetic field formed by the rotor winding 47. With this torque, the rotor 5 can rotate in the same direction as the composite rotor 4 and at a higher speed than the composite rotor 4.
出力軸6は、回転子5の軸線AXに貫設されて一体的に回転するように構成され、軸受け部21でケース2に回転自在に軸承されている。
The output shaft 6 is configured to penetrate the axis AX of the rotor 5 and rotate integrally therewith, and is rotatably supported by the case 2 by the bearing portion 21.
電源部7は、直流電源装置71、インバータ装置72、インバータ制御部73などにより構成されている。直流電源装置71には、例えばバッテリを用い、その出力端子をインバータ装置72に接続して直流電圧を供給する。インバータ装置72は、直流を三相交流に変換し、固定子巻線31に周波数の異なる二つの三相交流電流を重累して通電することができる。また、インバータ装置72は、二つの三相交流電流の相順を独立して正相順および逆相順に切り替えることができるようになっている。二つの三相交流電流の周波数、電流値、位相、および相順は、インバータ制御部73で可変に制御される。
The power supply unit 7 includes a DC power supply device 71, an inverter device 72, an inverter control unit 73, and the like. For example, a battery is used as the DC power supply device 71 and its output terminal is connected to the inverter device 72 to supply a DC voltage. The inverter device 72 can convert direct current into three-phase alternating current, and can apply two three-phase alternating currents having different frequencies to the stator winding 31 in an overlapping manner. The inverter device 72 can switch the phase order of the two three-phase alternating currents independently of the normal phase order and the reverse phase order. The inverter control unit 73 variably controls the frequency, current value, phase, and phase order of the two three-phase alternating currents.
次に、固定子3、複合回転子4、および回転子5の構成についてさらに詳述する。図2は、固定子3、複合回転子4、および回転子5の電気角360°分の構成を直線状に展開して示す軸線方向視図である。図2で、上側は外径側、下側は内径側であり、左右方向は周方向の電気角360°分の円弧状部分を直線状に展開表示したものである。本第1実施形態で、固定子巻線31と回転子巻線47の極対数は同一であり、したがってアウターモータユニットおよびインナーモータユニットの電気角360°は、同一の機械角になっている。
Next, the configuration of the stator 3, the composite rotor 4, and the rotor 5 will be described in further detail. FIG. 2 is an axial view of the configuration of the stator 3, the composite rotor 4, and the rotor 5 corresponding to an electrical angle of 360 ° developed linearly. In FIG. 2, the upper side is the outer diameter side, the lower side is the inner diameter side, and the left-right direction is an arc-shaped portion corresponding to an electrical angle of 360 ° in the circumferential direction developed linearly. In the first embodiment, the number of pole pairs of the stator winding 31 and the rotor winding 47 is the same, and therefore the electrical angle 360 ° of the outer motor unit and the inner motor unit is the same mechanical angle.
図2で、最も外径側に配置される固定子3は、電気角360°中に12個の内向き凸状のティース321をもつコア32、および分布巻きの固定子巻線31を有している。固定子巻線31は、内径側から順に、U相巻線(図中実線)、V相巻線(図中破線)、およびW相巻線(図中一点鎖線)から成っている。各相巻線は、電気角360°中に2個のコイルを有している。図2では、U相巻線の2個のU相コイル31U1、31U2がちょうど電気角360°中に収まっている。2個のU相コイル31U1、31U2はそれぞれティース321を5個分周回して、間に1個の空いたティース321Aが配されている。
In FIG. 2, the stator 3 arranged on the outermost diameter side has a core 32 having 12 inwardly convex teeth 321 at an electrical angle of 360 °, and a stator winding 31 of distributed winding. ing. The stator winding 31 is composed of a U-phase winding (solid line in the figure), a V-phase winding (broken line in the figure), and a W-phase winding (one-dot chain line in the figure) in order from the inner diameter side. Each phase winding has two coils in an electrical angle of 360 °. In FIG. 2, the two U-phase coils 31U1 and 31U2 of the U-phase winding are just within an electrical angle of 360 °. The two U-phase coils 31U1 and 31U2 each circulate five teeth 321 and one vacant tooth 321A is disposed therebetween.
2個のV相コイル31V1、31V2は、U相よりもティース321の4個分だけ図中の右方に配列され、U相コイル31U1、31U2と同様に巻回形成されている。さらに、2個のW相コイル31W1(2個目は図略)は、V相よりもティース321の4個分だけ図中の右方に配列され、U相コイル31U1、31U2と同様に巻回形成されている。つまり、コイルの構成は各相で同じであり、配列はU相、V相、W相の順番に周方向にティース321の4個分ずつシフトしている。
The two V-phase coils 31V1 and 31V2 are arranged on the right side of the figure by four teeth 321 rather than the U-phase, and are wound in the same manner as the U-phase coils 31U1 and 31U2. Further, two W-phase coils 31W1 (the second is not shown) are arranged on the right side of the figure by four teeth 321 rather than the V-phase, and are wound in the same manner as the U-phase coils 31U1 and 31U2. Is formed. That is, the coil configuration is the same for each phase, and the arrangement is shifted by four teeth 321 in the circumferential direction in the order of the U phase, the V phase, and the W phase.
固定子3の内径側には、ギャップG1を介して複合回転子4が配置されている。複合回転子4は、電気角360°中に12個の外向き凸状のティース421をもつ外径側の外側コア42、12個の内向き凸状のティースをもつ内径側の内側コア48、および両コア42、48の間に配置された磁気分離部45の三層構造になっている。外側コア42に巻回形成された分布巻きの誘導巻線44は、固定子3の固定子巻線31に対して内外対称に配置されている。すなわち、外径側から順に、U相巻線(図中実線)を構成する2個のU相コイル44U1、44U2、V相巻線(図中破線)を構成する2個のV相コイル44V1、44V2、W相巻線(図中一点鎖線)を構成する2個のW相コイル44W1(2個目は図略)が配置されている。そして、固定子巻線31および誘導巻線44の各同相コイルが、ギャップG1を挟んで対称に配置されている。つまり、固定子巻線31と誘導巻線44とは、同じコイル構成とされかつ周方向の相の配列順も一致している。外側コア42には、さらに、一対の界磁磁石41N、41Sが埋め込まれて回転界磁部41が形成されている。
The composite rotor 4 is disposed on the inner diameter side of the stator 3 via a gap G1. The composite rotor 4 includes an outer core 42 on the outer diameter side having twelve outwardly convex teeth 421 at an electrical angle of 360 °, an inner core 48 on the inner diameter side having twelve inwardly convex teeth, In addition, the magnetic separation portion 45 is disposed between the cores 42 and 48 and has a three-layer structure. The distributed winding induction winding 44 wound around the outer core 42 is arranged symmetrically with respect to the stator winding 31 of the stator 3. That is, in order from the outer diameter side, two U-phase coils 44U1 and 44U2 constituting a U-phase winding (solid line in the figure), two V-phase coils 44V1 constituting a V-phase winding (dashed line in the figure), Two W-phase coils 44W1 (the second is not shown) constituting 44V2 and a W-phase winding (the one-dot chain line in the figure) are arranged. The in-phase coils of the stator winding 31 and the induction winding 44 are arranged symmetrically with the gap G1 interposed therebetween. That is, the stator winding 31 and the induction winding 44 have the same coil configuration, and the arrangement order of the phases in the circumferential direction also matches. In the outer core 42, a pair of field magnets 41 </ b> N and 41 </ b> S is further embedded to form a rotating field portion 41.
一方、内側コア48のティースに巻回形成された分布巻きの回転子巻線47は、複合回転子4の誘導巻線44に対して内外対称に配置されている。すなわち、内径側から順に、U相巻線(図中実線)を構成する2個のU相コイル47U1、47U2、V相巻線(図中破線)を構成する2個のV相コイル47V1、47V2、W相巻線(図中一点鎖線)を構成する2個のW相コイル47W1(2個目は図略)が配置されている。そして、誘導巻線44および回転子巻線47の各同相コイルが、磁気分離部45を挟んで対称に配置されている。つまり、周方向に関する複合回転子4の誘導巻線44の三相の位置と回転子巻線47の三相の位置とは一致している。
On the other hand, the distributed winding rotor windings 47 wound around the teeth of the inner core 48 are arranged symmetrically with respect to the induction winding 44 of the composite rotor 4. That is, in order from the inner diameter side, two U-phase coils 47U1 and 47U2 constituting a U-phase winding (solid line in the figure), and two V-phase coils 47V1 and 47V2 constituting a V-phase winding (dashed line in the figure). , Two W-phase coils 47W1 (the second is not shown) constituting the W-phase winding (the one-dot chain line in the figure) are arranged. The in-phase coils of the induction winding 44 and the rotor winding 47 are arranged symmetrically with the magnetic separation part 45 in between. That is, the three-phase position of the induction winding 44 of the composite rotor 4 and the three-phase position of the rotor winding 47 in the circumferential direction coincide with each other.
複合回転子4の内径側には、ギャップG2を介して回転子5が配置されている。回転子5のコア52内には、一対の界磁磁石51N、51Sが埋め込まれて出力界磁部51が形成されている。
A rotor 5 is disposed on the inner diameter side of the composite rotor 4 via a gap G2. In the core 52 of the rotor 5, a pair of field magnets 51 </ b> N and 51 </ b> S are embedded to form an output field portion 51.
次に、固定子巻線31、誘導巻線44、および回転子巻線47の結線方法ならびに電気接続について、図3を参考にして説明する。図示されるように、固定子巻線31、誘導巻線44、および回転子巻線47はそれぞれ、中性点31N、44N、47Nを有して三相Y結線されている。固定子巻線31のU相端子31UT、V相端子31VT、およびW相端子31WTは、電源部7のインバータ装置72に電気接続されている。また、固定子巻線31と誘導巻線44との間は、電磁誘導作用によって結合されている。誘導巻線44と回転子巻線47との間は、磁気分離部45が介在するため電磁誘導作用は発生せず、接続リード49によりいずれか二相を入れ替えて電気接続されている。図3の例では、誘導巻線44のU相端子44UTが回転子巻線47のV相端子47VTに電気接続され、誘導巻線44のV相端子44VTが回転子巻線47のU相端子47UTに電気接続され、W相端子44WT、47WT同士が電気接続されている。
Next, the connection method and electrical connection of the stator winding 31, the induction winding 44, and the rotor winding 47 will be described with reference to FIG. As shown in the drawing, the stator winding 31, the induction winding 44, and the rotor winding 47 have neutral points 31N, 44N, and 47N, respectively, and are three-phase Y-connected. U-phase terminal 31 UT, V-phase terminal 31 VT, and W-phase terminal 31 WT of stator winding 31 are electrically connected to inverter device 72 of power supply unit 7. Further, the stator winding 31 and the induction winding 44 are coupled by electromagnetic induction. Between the induction winding 44 and the rotor winding 47, the magnetic separation portion 45 is interposed, so that no electromagnetic induction action occurs, and any two phases are switched by the connection lead 49 and are electrically connected. 3, the U-phase terminal 44UT of the induction winding 44 is electrically connected to the V-phase terminal 47VT of the rotor winding 47, and the V-phase terminal 44VT of the induction winding 44 is the U-phase terminal of the rotor winding 47. It is electrically connected to 47UT, and W-phase terminals 44WT and 47WT are electrically connected to each other.
図4は、固定子巻線31、誘導巻線44、および回転子巻線47の電気角360°分のコイル構成を例示説明する図である。図中の上段の固定子巻線31では、U相巻線が例示されている。すなわち、U相端子31UTから出た導体は、第1のU相コイル31U1でティース321を5個分所定回数だけ時計回りに周回したのち、第2のU相コイル31U2に渡ってティース321を5個分所定回数だけ反時計回りに周回して中性点31Nに達することを示している。図略の他相のV相巻線およびW相巻線も、周方向にティース321の4個分ずつ順番にシフトして同じコイル構成となっている。
FIG. 4 is a diagram illustrating an example of the coil configuration of the stator winding 31, the induction winding 44, and the rotor winding 47 for an electrical angle of 360 °. In the upper stator winding 31 in the figure, a U-phase winding is illustrated. That is, the conductor coming out of the U-phase terminal 31UT circulates the teeth 321 clockwise by a predetermined number of times by the first U-phase coil 31U1, and then turns the teeth 321 over the second U-phase coil 31U2. It shows that the neutral point 31N is reached by rotating counterclockwise a predetermined number of times. The V-phase winding and the W-phase winding of other phases not shown in the figure have the same coil configuration by sequentially shifting four teeth 321 in the circumferential direction.
また、図中の中段の誘導巻線44のコイル構成も固定子巻線31と同じコイル構成で、U相巻線の2個のU相コイル44U1、44U2が例示されている。さらに、下段の回転子巻線47のコイル構成も固定子巻線31と同じコイル構成で、2個のV相コイル47V1、47V2が例示されている。そして、誘導巻線44と回転子巻線47でU相とV相とを入れ替えて電気接続するために、接続リード49は誘導巻線44のU相端子44UTと回転子巻線47のV相端子47VTとを電気接続している。
Also, the coil configuration of the middle induction winding 44 in the figure is the same as that of the stator winding 31, and two U-phase coils 44U1 and 44U2 of the U-phase winding are illustrated. Furthermore, the coil configuration of the lower rotor winding 47 is the same as that of the stator winding 31, and two V-phase coils 47V1 and 47V2 are illustrated. The connection lead 49 is connected to the U-phase terminal 44 UT of the induction winding 44 and the V-phase of the rotor winding 47 so that the induction winding 44 and the rotor winding 47 are electrically connected by switching the U-phase and the V-phase. The terminal 47VT is electrically connected.
次に、上述のように構成された第1実施形態の多重回転子形電動機1の動作について説明する。まず、電源部7のインバータ装置72から固定子巻線31に周波数の異なる二つの三相交流電流を重累して通電する条件について整理しておく。二つの三相交流電流の周波数、電流値、および位相は独立した別々の値をとり得るとともに、相順も変更できる。したがって、周波数f1の第1交流電流により形成される第1固定子回転磁界の磁束Φ1、回転数n1とし、周波数f2の第2交流電流により形成される第2固定子回転磁界の磁束Φ2、回転数n2としたとき、磁束Φ1<磁束Φ2としても一般性は失われない。つまり、電流値が大きく、より大きな磁束を発生する側を第2交流電流とする。また、固定子巻線31の極対数Pとしたとき、第2固定子回転磁界の回転数n2=f2/P(rps)を正値とする。すると、第1固定子回転磁界の回転数n1=f1/P(rps)は、相順の正逆に応じて正負いずれの値も取り得る。なお、磁束Φ1、Φ2の位相は、それぞれ複合回転子4および回転子5が所望のトルクを発生するよう適正化する。
Next, the operation of the multi-rotor motor 1 according to the first embodiment configured as described above will be described. First, the conditions for energizing two three-phase alternating currents having different frequencies from the inverter device 72 of the power supply unit 7 to the stator winding 31 will be summarized. The frequency, current value, and phase of the two three-phase alternating currents can take independent and independent values, and the phase order can also be changed. Therefore, the magnetic flux Φ1 of the first stator rotating magnetic field formed by the first alternating current having the frequency f1 and the rotation speed n1, and the magnetic flux Φ2 of the second stator rotating magnetic field formed by the second alternating current having the frequency f2 are rotated. When the number n2 is set, generality is not lost even if magnetic flux Φ1 <magnetic flux Φ2. That is, the side where the current value is large and generates a larger magnetic flux is defined as the second alternating current. In addition, when the number of pole pairs of the stator winding 31 is P, the rotation number n2 = f2 / P (rps) of the second stator rotating magnetic field is a positive value. Then, the number of rotations n1 = f1 / P (rps) of the first stator rotating magnetic field can be either positive or negative depending on whether the phase sequence is positive or negative. The phases of the magnetic fluxes Φ1 and Φ2 are optimized so that the composite rotor 4 and the rotor 5 generate a desired torque, respectively.
図5は、固定子巻線31に第1および第2交流電流を重累して通電したときに得られる回転数増加率Kおよび出力特性を説明する一覧表の図である。一覧表中の回転数条件の欄は、回転数n1の正負および回転数n2との大小関係の条件を示している。一覧表中の電源部由来の回転数の欄は、一般的な電動機で電源部の周波数により定まる同期周波数を意味し、上述の回転数n1(負値の場合はその絶対値)および回転数n2のうち大きい側とする。一覧表中の回転数増加率Kの欄は、出力軸6で得られる出力回転数Noutが電源部由来の回転数の何倍になるかを示す率である。換言すれば、回転数増加率Kは、単一の固定子および回転子からなる一般的な電動機と比較してどれだけ高速回転化できたかを評価する指標である。一覧表中の出力特性の欄は、横軸を回転数、縦軸をトルクとして多重回転子形電動機1の総合的な出力特性を、アウターモータユニット単体およびインナーモータユニット単体の特性と比較図示したものである。
FIG. 5 is a table for explaining the rotational speed increase rate K and the output characteristics obtained when the first and second alternating currents are energized through the stator winding 31. As shown in FIG. The column of the rotational speed condition in the list shows the condition of the magnitude relationship between the positive and negative of the rotational speed n1 and the rotational speed n2. The column of the number of rotations derived from the power supply unit in the list means a synchronous frequency determined by the frequency of the power supply unit in a general electric motor, and the above-described rotation number n1 (absolute value in the case of a negative value) and rotation number n2 The larger side. The column of the rotational speed increase rate K in the list is a rate indicating how many times the output rotational speed Nout obtained by the output shaft 6 is higher than the rotational speed derived from the power supply unit. In other words, the rotational speed increase rate K is an index for evaluating how much high-speed rotation can be achieved compared to a general electric motor including a single stator and a rotor. The column of output characteristics in the list shows the overall output characteristics of the multi-rotor motor 1 in comparison with the characteristics of the single outer motor unit and the single inner motor unit, with the horizontal axis representing the rotational speed and the vertical axis representing the torque. Is.
前述した磁束Φ1<磁束Φ2であり、かつ複合回転子4が磁束Φ2のもとで所望のトルクを発生するように磁束Φ2の位相が適正化されている条件で、固定子巻線31に第1および第2交流電流を重累して通電すると、固定子巻線31には第1および第2固定子回転磁界が重累して発生する。これに対して、複合回転子4の回転界磁部41は、大きな磁束Φ2で大きなトルクT2を発生する第2固定子回転磁界に同期する。つまり、複合回転子4が回転数n2で回転する。補足すると、磁束Φ1の位相は、回転子5に適正化されており、複合回転子4に対しては、ずれている。このため、トルクT1は小さくなる。加えて、同期回転数からずれた回転磁界となるため、トルクT1は時間的に平均するとほぼゼロになる。なお、当状況が実現するように、第1および第2交流電流の周波数および位相を意図的に調整することも可能である。
Under the condition that the magnetic flux Φ1 <the magnetic flux Φ2 described above and the phase of the magnetic flux Φ2 is optimized so that the composite rotor 4 generates a desired torque under the magnetic flux Φ2, the stator winding 31 has a first phase. When the first and second alternating currents are applied in succession, the first and second stator rotating magnetic fields are generated in the stator winding 31 in a cumulative manner. On the other hand, the rotating field part 41 of the composite rotor 4 synchronizes with the second stator rotating magnetic field that generates a large torque T2 with a large magnetic flux Φ2. That is, the composite rotor 4 rotates at the rotation speed n2. Supplementally, the phase of the magnetic flux Φ 1 is optimized for the rotor 5, and is shifted from the composite rotor 4. For this reason, torque T1 becomes small. In addition, since the rotating magnetic field deviates from the synchronous rotational speed, the torque T1 becomes almost zero when averaged over time. In addition, it is also possible to intentionally adjust the frequency and phase of the first and second alternating currents so that this situation is realized.
複合回転子4が回転数n2で回転するとき、複合回転子4上の誘導巻線44からみて、同期している第2固定子回転磁界は変化せず、第1固定子回転磁界(磁束Φ1、回転数n1)のみが複合回転子4の回転数n2を含んで回転数Naで変化する。すると、誘導巻線44には回転数Naに相当する周波数の誘導起電力が生起されて回転子巻線47に電流が流れ、回転子回転磁界が発生する。
When the composite rotor 4 rotates at the rotational speed n2, the second stator rotating magnetic field synchronized with the induction winding 44 on the composite rotor 4 does not change, and the first stator rotating magnetic field (magnetic flux Φ1) is not changed. , Only the rotational speed n1) includes the rotational speed n2 of the composite rotor 4 and changes with the rotational speed Na. Then, an induced electromotive force having a frequency corresponding to the rotation speed Na is generated in the induction winding 44, a current flows through the rotor winding 47, and a rotor rotating magnetic field is generated.
ここでU相とV相とを入れ替えて電気接続しているので、複合回転子4上における回転子回転磁界の回転数は、回転数Naの符号を反転したものとなる。また、出力界磁部51からみた回転子回転磁界の回転数は、複合回転子4の回転数n2に回転数Naの符号を反転して加算した値となる。回転子5および出力軸6は、この回転子回転磁界に同期して回転する。したがって、出力軸6では、複合回転子4の回転数n2に回転数Naの符号を反転して加算した出力回転数Noutを得ることができる。ここで、回転数Naが負値のときに、大きな出力回転数Noutを得られる点に留意する。
Here, since the U phase and the V phase are interchanged and electrically connected, the number of rotations of the rotor rotating magnetic field on the composite rotor 4 is obtained by inverting the sign of the number of rotations Na. The rotational speed of the rotor rotating magnetic field viewed from the output field unit 51 is a value obtained by inverting the sign of the rotational speed Na to the rotational speed n2 of the composite rotor 4 and adding it. The rotor 5 and the output shaft 6 rotate in synchronization with this rotor rotating magnetic field. Therefore, the output shaft 6 can obtain an output rotational speed Nout obtained by inverting the sign of the rotational speed Na to the rotational speed n2 of the composite rotor 4 and adding it. Here, it should be noted that a large output rotational speed Nout can be obtained when the rotational speed Na is a negative value.
出力回転数Noutおよび回転数増加率Kを求める際に、第1固定子回転磁界の回転数n1の大小および正負を考慮した4条件に場合分けして考える。図5の回転数条件ア)0<n2≦n1では、誘導巻線44からみた第1固定子回転磁界の回転数Na=n1-n2となり、出力軸回転数Nout=n2+(-Na)=2×n2-n1となる。また、回転数増加率K1=Nout/n1=(2×n2/n1)-1となる。回転数増加率K1は最大でも1(n1=n2のとき)であり、効果は生じない。仮に、U相とV相との電気接続の入れ替えを行わない場合には回転数Naの符号の反転はなくなるが、出力軸回転数Nout=n2+Na=n1となり、やはり効果は生じない。
When obtaining the output rotation speed Nout and the rotation speed increase rate K, the four conditions that consider the magnitude and positive / negative of the rotation speed n1 of the first stator rotating magnetic field are considered separately. In the rotational speed condition a) 0 <n2 ≦ n1 in FIG. 5, the rotational speed Na of the first stator viewed from the induction winding 44 is Na = n1-n2, and the output shaft rotational speed Nout = n2 + (− Na) = 2 Xn2-n1 Further, the rotational speed increase rate K1 = Nout / n1 = (2 × n2 / n1) −1. The rotational speed increase rate K1 is 1 at the maximum (when n1 = n2), and no effect is produced. If the electrical connection between the U phase and the V phase is not switched, the sign of the rotational speed Na is not reversed, but the output shaft rotational speed Nout = n2 + Na = n1, and no effect is produced.
回転数条件イ)0≦n1<n2では、出力軸回転数Nout=2×n2-n1となり、回転数増加率K2=Nout/n2=2-(n1/n2)となる。回転数増加率K2は最大で2(n1=0のとき)となり、顕著な効果が生じる。
Rotational speed condition a) When 0 ≦ n1 <n2, the output shaft rotational speed Nout = 2 × n2-n1, and the rotational speed increase rate K2 = Nout / n2 = 2− (n1 / n2). The rotational speed increase rate K2 is 2 at the maximum (when n1 = 0), and a remarkable effect occurs.
回転数条件ウ)n1<0<n2(ただし、n2≧(n1の絶対値))では、出力軸回転数Nout=2×n2+(n1の絶対値)となり、回転数増加率K3=Nout/n2=2+(n1の絶対値/n2)となる。回転数増加率K3は最大で3(n1=―n2のとき)となり、顕著な効果が生じる。
Rotational speed condition c) When n1 <0 <n2 (where n2 ≧ (the absolute value of n1)), the output shaft rotational speed Nout = 2 × n2 + (the absolute value of n1), and the rotational speed increase rate K3 = Nout / n2 = 2 + (absolute value of n1 / n2). The rotational speed increase rate K3 is 3 at the maximum (when n1 = −n2), and a remarkable effect is produced.
回転数条件エ)n1<0<n2(ただし、n2<(n1の絶対値))では、出力軸回転数Nout=2×n2+(n1の絶対値)となり、回転数増加率K4=Nout/(n1の絶対値)=2×n2/(n1の絶対値)+1となる。回転数増加率K4は最大で3(n1=―n2のとき)となり、n1=―2×n2で回転数増加率K4=2となる範囲まで顕著な効果が生じる。
Rotational speed condition d) When n1 <0 <n2 (where n2 <(the absolute value of n1)), the output shaft rotational speed Nout = 2 × n2 + (the absolute value of n1), and the rotational speed increase rate K4 = Nout / ( (the absolute value of n1) = 2 × n2 / (the absolute value of n1) +1. The rotational speed increase rate K4 is 3 at the maximum (when n1 = −n2), and a remarkable effect is produced up to a range where the rotational speed increase rate K4 = 2 at n1 = −2 × n2.
なお、回転数条件イ~エ)では、図5の出力特性の欄に示されるように、多重回転子形電動機1の出力特性がアウターモータユニット単体およびインナーモータユニット単体よりも高速回転側に位置している。つまり、回転数増加率K2~K4が1を超え、高速回転数を得られる効果が生じる。
In the rotation speed conditions (a) to (d), as shown in the output characteristic column of FIG. 5, the output characteristics of the multi-rotor motor 1 are positioned on the higher speed rotation side than the outer motor unit and the inner motor unit alone. is doing. That is, there is an effect that the rotation speed increase rate K2 to K4 exceeds 1, and a high speed rotation speed can be obtained.
図6は、図5で得られた回転数増加率K(K1~K4)をグラフ化して示した図である。図中の横軸は回転数n1、縦軸は回転数増加率Kである。図6から明らかなように、回転数n1が回転数n2の逆回転方向(負値)で絶対値が等しいときに、回転数増加率Kは最大値3となる。ここで、前述したようにアウターモータユニットおよびインナーモータユニットは、回転数とトルクとの関係を示す出力特性が互いにほぼ同一になるように構成されている。したがって、インバータ装置72から周波数および電流値が概ね等しく相順を反転した第1および第2交流電流を重累して固定子巻線31に通電すれば、回転数増加率Kが3で電流値に応じたトルクを出力する多重回転子形電動機1を実現できる。
FIG. 6 is a graph showing the rotational speed increase rate K (K1 to K4) obtained in FIG. In the figure, the horizontal axis represents the rotational speed n1, and the vertical axis represents the rotational speed increase rate K. As is clear from FIG. 6, when the rotational speed n1 is the reverse rotational direction (negative value) of the rotational speed n2 and the absolute values are equal, the rotational speed increase rate K becomes the maximum value 3. Here, as described above, the outer motor unit and the inner motor unit are configured such that the output characteristics indicating the relationship between the rotational speed and the torque are substantially the same. Therefore, if the first and second alternating currents having substantially the same frequency and current value from the inverter device 72 and having their phase order reversed are applied to the stator winding 31 in succession, the rotational speed increase rate K is 3 and the current value. It is possible to realize the multi-rotor motor 1 that outputs torque according to the above.
以上説明したように、第1実施形態の多重回転子形電動機1によれば、回転数増加率Kが最大3となるまで高速回転化が可能である。また、複数のモータユニットを別々に設けるのではなく複合一体化しており、加えて誘導巻線44により非接触で誘導起電力を生起できブラシなどの回転給電部が不要であることから、多重回転子形電動機1を小形化でき、製造コストは低廉になる。さらに、電源部7を単一のインバータ装置72で実現できることから、製造コストは一層低廉になる。また、回転給電部が不要であることから、メンテナンスフリーを実現でき、ランニングコストも低廉になる。
As described above, according to the multi-rotor motor 1 of the first embodiment, high-speed rotation is possible until the rotation speed increase rate K reaches a maximum of 3. In addition, a plurality of motor units are not provided separately, but are combined and integrated, and an induction electromotive force can be generated in a non-contact manner by the induction winding 44, so that a rotating power supply unit such as a brush is unnecessary, so that multiple rotations are possible. The child electric motor 1 can be reduced in size, and the manufacturing cost is reduced. Furthermore, since the power supply unit 7 can be realized by a single inverter device 72, the manufacturing cost is further reduced. In addition, since the rotating power feeding unit is unnecessary, maintenance-free operation can be realized and the running cost can be reduced.
さらに、固定子3の固定子巻線31と複合回転子4の誘導巻線44とは、同じコイル構成とされかつ周方向の相の配列順も一致するように配置されている。また、周方向に関する複合回転子4の誘導巻線44の三相の位置と回転子巻線47の三相の位置とは一致している。これにより、各巻線31、44、47のコイル構成やコイル間の接続方法が統一されて分かりやすくかつ製造作業も容易となり、製造コストを削減できる。また、誘導巻線44および回転子巻線47の対応する各相端子のいずれか二相を入れ替えて電気接続しているので、容易に電気接続を適正化できる。
Further, the stator winding 31 of the stator 3 and the induction winding 44 of the composite rotor 4 have the same coil configuration and are arranged so that the arrangement order of the phases in the circumferential direction also coincides. Further, the three-phase position of the induction winding 44 of the composite rotor 4 and the three-phase position of the rotor winding 47 in the circumferential direction coincide with each other. As a result, the coil configuration of each of the windings 31, 44 and 47 and the connection method between the coils are unified, making it easy to understand and making the manufacturing work easy, and reducing the manufacturing cost. In addition, since any two phases of the corresponding phase terminals of the induction winding 44 and the rotor winding 47 are switched and electrically connected, the electrical connection can be easily optimized.
なお、第1実施形態では固定子巻線31と回転子巻線47の極対数は同一としているが、異なる値とすることも可能である。ただし、図2に示された各巻線の構成は変化する。この場合の一般的な回転数増加率Kは、図7により求めることができる。図7は、固定子巻線と回転子巻線の極対数が異なる場合の回転数増加率Kを説明する一覧表の図である。図中の計算式で、固定子巻線の極対数P2、回転子巻線の極対数P1である。極対数が同一である図5の場合と同様に、回転数条件オ)0<n2≦n1で効果は生じず、回転数条件カ)0≦n1<n2、キ)n1<0<n2(ただし、n2≧(n1の絶対値))、およびク)n1<0<n2(ただし、n2<(n1の絶対値))で効果が生じる。
In the first embodiment, the number of pole pairs of the stator winding 31 and the rotor winding 47 is the same, but can be different. However, the configuration of each winding shown in FIG. 2 changes. The general rotational speed increase rate K in this case can be obtained from FIG. FIG. 7 is a table illustrating the rotational speed increase rate K when the number of pole pairs of the stator winding and the rotor winding is different. In the calculation formula in the figure, the number of pole pairs P2 of the stator windings and the number of pole pairs P1 of the rotor windings. As in the case of FIG. 5 where the number of pole pairs is the same, the rotation speed condition o) 0 <n2 ≦ n1 has no effect, and the rotation speed condition f) 0 ≦ n1 <n2, g) n1 <0 <n2 (however, , N2 ≧ (the absolute value of n1)), and h) n1 <0 <n2 (where n2 <(the absolute value of n1)).
次に、第2実施形態の多重回転子形電動機10について説明する。第2実施形態の多重回転子形電動機10は、第1実施形態の複合回転子4の誘導巻線44および回転子巻線47をトロイダルコイル群8に置き換えて構成され、他の部位は第1実施形態と同じである。図8は、第2実施形態の多重回転子形電動機10の固定子3、複合回転子40、および回転子5の電気角360°分の構成を直線状に展開して示す軸線方向視図である。図8で、上側は外径側、下側は内径側であり、左右方向は周方向の電気角360°分の円弧状部分を直線状に展開表示したものである。トロイダルコイル群8は、電気角360°の範囲で12個のトロイダルコイルにより構成されており、以下に詳述する。
Next, the multi-rotor motor 10 of the second embodiment will be described. The multi-rotor motor 10 of the second embodiment is configured by replacing the induction winding 44 and the rotor winding 47 of the composite rotor 4 of the first embodiment with a toroidal coil group 8, and the other parts are the first. This is the same as the embodiment. FIG. 8 is an axial direction view showing the configuration of the stator 3, the composite rotor 40, and the rotor 5 for the electrical angle of 360 ° of the multi-rotor motor 10 of the second embodiment in a straight line. is there. In FIG. 8, the upper side is the outer diameter side, the lower side is the inner diameter side, and the left-right direction is a linear development of the arc-shaped portion corresponding to the electrical angle of 360 ° in the circumferential direction. The toroidal coil group 8 is composed of 12 toroidal coils in the range of an electrical angle of 360 °, which will be described in detail below.
図8を図2と比較するとわかるように、第2実施形態では誘導巻線44を構成する2個のU相コイル44U1、44U2および回転子巻線47構成する2個のV相コイル47V1、47V2に代えて、4個のU-V相トロイダルコイル81~84が設けられている。同様に、誘導巻線44を構成する2個のV相コイル44V1、44V2および回転子巻線47構成する2個のU相コイル47U1、47U2に代えて、4個のV-U相トロイダルコイル85~87(4個目は図略)が設けられている。また、誘導巻線44を構成する2個のW相コイル44W1(2個目は図略)および回転子巻線47構成する2個のW相コイル47W1(2個目は図略)に代えて、4個のW-W相トロイダルコイル88、89(3個目および4個目は図略)が設けられている。
As can be seen by comparing FIG. 8 with FIG. 2, in the second embodiment, the two U-phase coils 44U1 and 44U2 constituting the induction winding 44 and the two V-phase coils 47V1 and 47V2 constituting the rotor winding 47 are provided. Instead, four U-V phase toroidal coils 81 to 84 are provided. Similarly, instead of the two V-phase coils 44V1 and 44V2 constituting the induction winding 44 and the two U-phase coils 47U1 and 47U2 constituting the rotor winding 47, four VU-phase toroidal coils 85 are provided. To 87 (the fourth is not shown). Further, instead of the two W-phase coils 44W1 (the second is not shown) constituting the induction winding 44 and the two W-phase coils 47W1 (the second is not shown) constituting the rotor winding 47, Four WW-phase toroidal coils 88 and 89 (the third and fourth are not shown) are provided.
各トロイダルコイル81~89は、複合回転子40の外側コア42および内側コア48の両方に鎖交するように磁気分離部45を超えて巻回形成されている。第1のU-V相トロイダルコイル81は、誘導巻線44の第1のU相コイル44U1が巻回されていた外側コア42の一方のティース間422と、回転子巻線47の第1のV相コイル47V1が巻回されていた内側コア48の一方のティース間482との間に巻回形成されている。第2のU-V相トロイダルコイル82は、誘導巻線44の第1のU相コイル44U1が巻回されていた外側コア42の他方のティース間423と、回転子巻線47の第1のV相コイル47V1が巻回されていた内側コア48の他方のティース間483との間に巻回形成されている。
The toroidal coils 81 to 89 are wound around the magnetic separation portion 45 so as to be linked to both the outer core 42 and the inner core 48 of the composite rotor 40. The first U-V phase toroidal coil 81 includes one of the teeth 422 of the outer core 42 around which the first U-phase coil 44U1 of the induction winding 44 is wound, and the first winding of the rotor winding 47. Winding is formed between one tooth 482 of the inner core 48 around which the V-phase coil 47V1 is wound. The second UV-phase toroidal coil 82 includes a first tooth 423 between the other teeth of the outer core 42 around which the first U-phase coil 44U1 of the induction winding 44 is wound, and a first winding of the rotor winding 47. Winding is formed between the other teeth 483 of the inner core 48 around which the V-phase coil 47V1 is wound.
第3および第4のU-V相トロイダルコイル83、84はそれぞれ、誘導巻線44の第2のU相コイル44U2が巻回されていた外側コア42の一方および他方のティース間424、425と、回転子巻線47の第2のV相コイル47V2が巻回されていた内側コア48の一方および他方のティース間484(2個目は図略)との間に巻回形成されている。結局、各U-V相トロイダルコイル81~84は、外側コア42よりも内側コア48で周方向に4ティース分だけ図中の右方向にシフトするように巻回形成されている。
Third and fourth UV phase toroidal coils 83, 84 are respectively connected between one and other teeth 424, 425 of outer core 42 around which second U-phase coil 44U2 of induction winding 44 is wound. The second V-phase coil 47V2 of the rotor winding 47 is wound between one and the other teeth 484 of the inner core 48 (the second is not shown). Eventually, each of the U-V phase toroidal coils 81 to 84 is wound around the inner core 48 so as to shift to the right in the drawing by 4 teeth in the circumferential direction rather than the outer core 42.
同様に、4個のV-U相トロイダルコイル85~87(4個目は図略)はそれぞれ、外側コア42のティース間426、427,428(4個目は図略)と、内側コア48のティース間486、487、488(4個目は図略)との間に、外側コア42よりも内側コア48で4ティース分だけ図中の左方向にシフトするように巻回形成されている。また、4個のW-W相トロイダルコイル88、89(3個目および4個目は図略)はそれぞれ、外側コア42のティース間429、42A(3個目および4個目は図略)と、これらに内外対称な内側コア48のティース間489、48A(3個目および4個目は図略)との間に巻回形成されている。
Similarly, the four VU-phase toroidal coils 85 to 87 (the fourth is not shown) are between the teeth 426, 427, 428 (the fourth is not shown) of the outer core 42 and the inner core 48, respectively. Between the teeth 486, 487, and 488 (the fourth is not shown), the inner core 48 is wound around the inner core 48 so as to shift to the left in the figure by the amount of four teeth. . In addition, four WW-phase toroidal coils 88 and 89 (third and fourth are not shown) are respectively between teeth 429 and 42A of the outer core 42 (third and fourth are not shown). And between the teeth 489 and 48A (the third and fourth are not shown) of the inner core 48 which is symmetrical inside and outside.
次に、トロイダルコイル群8の機能について、第1および第2のU-V相トロイダルコイル81、82を例にして説明する。図9で、(1)は第1実施形態の誘導巻線44および回転子巻線47の機能を説明する図、(2)は第2実施形態のトロイダルコイル群8の機能を説明する図である。図9(1)の第1実施形態において、固定子巻線31のU相コイル31U1に交流電流が通電されて固定子3のコア32の各ティース321に磁束φが生起される場合を考える。磁束φは、ギャップG1を越えて複合回転子4の外側コア42の各ティース421に到達し、誘導巻線44のU相コイル44U1に鎖交し、ヨーク部で磁束φY11、φY12に分岐する。誘導巻線44のU相コイル44U1は、ティース421の5個分を周回しており、磁束φの5個分に鎖交して誘導起電力が発生する。この誘導起電力が回転子巻線47の第1のV相コイル47V1に供給されて電流が流れ、内側コア48の各ティース481に磁束φ2が形成され、回転子回転磁界が形成される。また、回転子回転磁界の大きさは、元の磁束φの5個分に比例する。
Next, the function of the toroidal coil group 8 will be described by taking the first and second UV phase toroidal coils 81 and 82 as an example. In FIG. 9, (1) is a diagram for explaining the functions of the induction winding 44 and the rotor winding 47 of the first embodiment, and (2) is a diagram for explaining the functions of the toroidal coil group 8 of the second embodiment. is there. In the first embodiment of FIG. 9 (1), consider a case where an alternating current is applied to the U-phase coil 31 U 1 of the stator winding 31 and a magnetic flux φ is generated in each tooth 321 of the core 32 of the stator 3. The magnetic flux φ reaches each tooth 421 of the outer core 42 of the composite rotor 4 beyond the gap G1, interlinks with the U-phase coil 44U1 of the induction winding 44, and branches to magnetic fluxes φY11 and φY12 at the yoke portion. The U-phase coil 44U1 of the induction winding 44 circulates five teeth 421, and an induced electromotive force is generated by interlinking with five magnetic fluxes φ. This induced electromotive force is supplied to the first V-phase coil 47V1 of the rotor winding 47 so that a current flows, a magnetic flux φ2 is formed in each tooth 481 of the inner core 48, and a rotor rotating magnetic field is formed. Further, the magnitude of the rotor rotating magnetic field is proportional to five of the original magnetic flux φ.
一方、図9(2)の第2実施形態において、固定子3側の各ティース321に磁束φが生起される場合、磁束φが外側コア42の各ティース421に到達し、ヨーク部で磁束φY11、φY12に分岐する(φY11+φY12=5φ)点は同じである。第1および第2のU-V相トロイダルコイル81、82は、分岐前または分岐後の磁束に鎖交し、それぞれに誘導起電力が発生する。これにより、第1および第2のU-V相トロイダルコイル81、82にそれぞれ電流が流れ、鎖交している内側コア48のヨーク部に磁束φY21、φY22が発生する。これにより、各ティース481に磁束φ2が形成され、回転子回転磁界が形成される。回転子回転磁界の大きさは、ヨーク部の磁束φY21、φY22の和に比例し、すなわち元の磁束φの5個分に比例する。
On the other hand, in the second embodiment of FIG. 9B, when the magnetic flux φ is generated in each tooth 321 on the stator 3 side, the magnetic flux φ reaches each tooth 421 of the outer core 42, and the magnetic flux φY11 is generated at the yoke portion. , ΦY12 (φY11 + φY12 = 5φ) is the same point. The first and second UV phase toroidal coils 81 and 82 are linked to the magnetic flux before or after branching, and an induced electromotive force is generated in each of them. As a result, current flows through the first and second UV phase toroidal coils 81 and 82, respectively, and magnetic fluxes φY21 and φY22 are generated in the yoke portion of the inner core 48 that is linked. Thereby, magnetic flux φ2 is formed in each tooth 481, and a rotor rotating magnetic field is formed. The magnitude of the rotor rotating magnetic field is proportional to the sum of the magnetic fluxes φY21 and φY22 of the yoke portion, that is, proportional to five of the original magnetic flux φ.
上記の機能は、トロイダルコイル群8を構成する他のトロイダルコイル83~89でも略同様である。したがって、第2実施形態のトロイダルコイル群8は、内側コア48に回転子回転磁界を形成する点で、第1実施形態の誘導巻線44および回転子巻線47と同等の機能を有する。
The above functions are substantially the same for the other toroidal coils 83 to 89 constituting the toroidal coil group 8. Therefore, the toroidal coil group 8 of the second embodiment has the same functions as the induction winding 44 and the rotor winding 47 of the first embodiment in that a rotor rotating magnetic field is formed on the inner core 48.
次に、トロイダルコイル群8の配置を変形した第2実施形態のバリエーションについて説明する。図8に示される第2実施形態では、トロイダルコイル相互が交差して重なっているので、多重回転子形電動機10が軸方向に大形化してしまう。この対応策として、トロイダルコイル群8を巻回形成する引き回しルートを変更するバリエーションが考えられる。図10は、第2実施形態の多重回転子形電動機10のバリエーションの電気角360°分の構成を直線状に展開して示す軸線方向視図である。図示されるように、W-W相トロイダルコイル88、89(3個目および4個目は図略)を避けるように、U-V相トロイダルコイル81~84およびV-U相トロイダルコイル85~87(4個目は図略)を屈曲させて引き回すことができる。これにより、コイル相互の交差をなくして軸方向の大形化を避けることができる。
Next, a variation of the second embodiment in which the arrangement of the toroidal coil group 8 is modified will be described. In the second embodiment shown in FIG. 8, since the toroidal coils cross each other and overlap each other, the multiple rotor type motor 10 is enlarged in the axial direction. As a countermeasure for this, a variation in which a routing route for winding the toroidal coil group 8 is changed can be considered. FIG. 10 is a view in the axial direction showing the configuration of the variation of the multi-rotor electric motor 10 of the second embodiment for an electrical angle of 360 ° in a straight line. As shown in the figure, in order to avoid the WW phase toroidal coils 88 and 89 (the third and fourth are not shown), the UV phase toroidal coils 81 to 84 and the VU phase toroidal coils 85 to 87 (the fourth is not shown) can be bent and routed. As a result, the crossing of the coils can be eliminated and an increase in size in the axial direction can be avoided.
次に、第2実施形態およびそのバリエーションでの固定子巻線31およびトロイダルコイル群8の結線方法ならびに電気接続について、図11を参考にして説明する。図示されるように、固定子巻線31が三相Y結線され、インバータ装置72に電気接続される点は第1実施形態と同じである。一方、トロイダルコイル群8では、4個のU-V相トロイダルコイル81~84が順次直列接続され、一端にU相端子8UT、他端にU相中性点8NUが設けられる。同様に、4個のV-U相トロイダルコイル85~87(4個目は図略)が順次直列接続され、一端にV相端子8VT、他端にV相中性点8NVが設けられる。また、4個のW-W相トロイダルコイル88、89(3個目および4個目は図略)が順次直列接続され、一端にW相端子8WT、他端にW相中性点8NWが設けられる。そして、3相の各相端子8UT、8VT、8WTが接続され、各相中性点8NU、8NV、8NWが接続される。
Next, the connection method and electrical connection of the stator winding 31 and the toroidal coil group 8 in the second embodiment and its variations will be described with reference to FIG. As shown in the figure, the stator winding 31 is three-phase Y-connected and electrically connected to the inverter device 72 as in the first embodiment. On the other hand, in the toroidal coil group 8, four UV phase toroidal coils 81 to 84 are sequentially connected in series, and a U-phase terminal 8UT is provided at one end and a U-phase neutral point 8NU is provided at the other end. Similarly, four VU-phase toroidal coils 85 to 87 (fourth not shown) are sequentially connected in series, and a V-phase terminal 8VT is provided at one end and a V-phase neutral point 8NV is provided at the other end. In addition, four WW-phase toroidal coils 88 and 89 (the third and fourth are not shown) are connected in series, and a W-phase terminal 8WT is provided at one end and a W-phase neutral point 8NW is provided at the other end. It is done. And each phase terminal 8UT, 8VT, 8WT of 3 phases is connected, and each phase neutral point 8NU, 8NV, 8NW is connected.
図12は、回転子5側から固定子3側を見た場合の固定子巻線31およびトロイダルコイル群8の電気角360°分のコイル構成を説明する図である。図中の上段の固定子巻線31のコイル構成は、図4で説明した第1実施形態と同じである。トロイダルコイル群8のコイル構成は錯綜して見えにくいので、図13~図15に分けて再掲する。
FIG. 12 is a diagram illustrating a coil configuration for an electrical angle of 360 ° of the stator winding 31 and the toroidal coil group 8 when the stator 3 side is viewed from the rotor 5 side. The coil configuration of the upper stator winding 31 in the figure is the same as that of the first embodiment described in FIG. Since the coil configuration of the toroidal coil group 8 is complicated and difficult to see, it is shown again in FIGS.
図13は、回転子5側から固定子3側を見た場合のトロイダルコイル群8中のU-V相トロイダルコイル81~84のコイル構成を説明する図である。図示されるように、U相端子8UTから出た導体は、第1のU-V相トロイダルコイル81で所定回数だけ反時計回りに周回したのち、第2のU-V相トロイダルコイル82に渡って所定回数だけ時計回りに周回して第3のU-V相トロイダルコイル83に渡る。さらに、導体は、第3のU-V相トロイダルコイル83を所定回数だけ時計回りに周回したのち、第4のU-V相トロイダルコイル84に渡って所定回数だけ反時計回りに周回し、U相中性点8NUに達する。
FIG. 13 is a diagram for explaining the coil configuration of the UV phase toroidal coils 81 to 84 in the toroidal coil group 8 when the stator 3 side is viewed from the rotor 5 side. As shown in the figure, the conductor coming out of the U-phase terminal 8UT circulates counterclockwise a predetermined number of times by the first UV-phase toroidal coil 81, and then crosses the second UV-phase toroidal coil 82. Then, it circulates clockwise a predetermined number of times and passes over the third UV phase toroidal coil 83. Further, the conductor circulates the third UV phase toroidal coil 83 clockwise a predetermined number of times, and then circulates counterclockwise a predetermined number of times over the fourth UV phase toroidal coil 84. A phase neutral point of 8 NU is reached.
図14は、回転子5側から固定子3側を見た場合のトロイダルコイル群8中のV-U相トロイダルコイル85~87のコイル構成を説明する図である。図示されるように、V相端子8VTから出た導体は、第1のV-U相トロイダルコイル85で所定回数だけ反時計回りに周回したのち、第2のV-U相トロイダルコイル86に渡って所定回数だけ時計回りに周回して第3のV-U相トロイダルコイル87に渡る。さらに、導体は、第3のV-U相トロイダルコイル87を所定回数だけ時計回りに周回したのち、第4のV-U相トロイダルコイルに渡って所定回数だけ反時計回りに周回し、V相中性点8NVに達する。
FIG. 14 is a diagram illustrating the coil configuration of the VU phase toroidal coils 85 to 87 in the toroidal coil group 8 when the stator 3 side is viewed from the rotor 5 side. As shown in the figure, the conductor coming out of the V-phase terminal 8VT circulates counterclockwise a predetermined number of times by the first VU-phase toroidal coil 85, and then crosses the second VU-phase toroidal coil 86. Rotate clockwise a predetermined number of times and pass to the third VU phase toroidal coil 87. Further, the conductor circulates the third VU-phase toroidal coil 87 clockwise a predetermined number of times, and then circulates counterclockwise a predetermined number of times over the fourth VU-phase toroidal coil. A neutral point of 8 NV is reached.
図15は、回転子5側から固定子3側を見た場合のトロイダルコイル群8中のW-W相トロイダルコイル88、89のコイル構成を説明する図である。図示されるように、W相端子8WTから出た導体は、第1のW-W相トロイダルコイル88で所定回数だけ反時計回りに周回したのち、第2のW-W相トロイダルコイル89に渡って所定回数だけ時計回りに周回して第3のW-W相トロイダルコイルに渡る。さらに、導体は、第3のW-W相トロイダルコイルを所定回数だけ時計回りに周回したのち、第4のW-W相トロイダルコイルに渡って所定回数だけ反時計回りに周回し、W相中性点8NWに達する。なお、図11~図15に示す第2実施形態では、同相コイル群に周回方向の異なるコイルが混在している場合が例示されており、コイルの周回方向を統一しコイル間の繋ぎ方を変更することにより対処してもよい。
FIG. 15 is a diagram illustrating the coil configuration of the WW phase toroidal coils 88 and 89 in the toroidal coil group 8 when the stator 3 side is viewed from the rotor 5 side. As shown in the drawing, the conductor coming out of the W-phase terminal 8WT circulates counterclockwise a predetermined number of times by the first WW-phase toroidal coil 88, and then passes to the second WW-phase toroidal coil 89. Then, it circulates clockwise a predetermined number of times and passes over the third WW phase toroidal coil. Further, the conductor circulates the third WW phase toroidal coil clockwise a predetermined number of times, and then circulates counterclockwise a predetermined number of times over the fourth WW phase toroidal coil. The sex point reaches 8NW. In the second embodiment shown in FIG. 11 to FIG. 15, the case where coils having different winding directions are mixed in the in-phase coil group is illustrated, and the winding direction of the coils is unified and the connection method between the coils is changed. It may be dealt with by doing.
上述のように構成された第2実施形態の多重回転子形電動機10の動作は、図5および図6で説明した第1実施形態と同じになる。また、第1実施形態と同等の効果に加えて、さらに、トロイダルコイル81~89が外側コア42および内側コア48に跨って巻回されることにより保持強度が向上するので、耐遠心力強度の確保が容易となり、製造コストを低減できる。
The operation of the multi-rotor electric motor 10 of the second embodiment configured as described above is the same as that of the first embodiment described with reference to FIGS. Further, in addition to the effects equivalent to those of the first embodiment, since the toroidal coils 81 to 89 are wound around the outer core 42 and the inner core 48, the holding strength is improved, so that the centrifugal strength strength is improved. Securement is facilitated and manufacturing costs can be reduced.
次に、概念的に説明した第1実施形態の多重回転子形電動機1の実態構成を実施例で説明する。図16は、第1実施形態の多重回転子形電動機1の実態構成の同軸内外配置例11を説明する断面図である。同軸内外配置例11では、アウターモータユニットおよびインナーモータユニットが、軸線AXを共通として同軸外側と内側に配置される。また、図17は、第1実施形態とはモータユニットの配置が異なる多重回転子形電動機の実態構成のタンデム配置例12を説明する断面図である。タンデム配置例12では、アウターモータユニットおよびインナーモータユニットは、軸線AXを共通として軸線AX方向に並んで配置される。
Next, the actual configuration of the multi-rotor electric motor 1 of the first embodiment described conceptually will be described by way of examples. FIG. 16 is a cross-sectional view illustrating a coaxial inner / outer arrangement example 11 of the actual configuration of the multiple rotor electric motor 1 of the first embodiment. In the coaxial inner / outer arrangement example 11, the outer motor unit and the inner motor unit are arranged on the coaxial outer side and the inner side with the axis AX in common. FIG. 17 is a cross-sectional view for explaining a tandem arrangement example 12 of an actual configuration of a multi-rotor motor having a motor unit arrangement different from that of the first embodiment. In the tandem arrangement example 12, the outer motor unit and the inner motor unit are arranged side by side in the direction of the axis AX with the axis AX as a common.
図16に示される同軸内外配置例で、固定子3はケース2の内面に固定され、固定子3の内径側に複合回転子4が配置されている。複合回転子4は、軸線AX方向両側に延びる円筒状の中間軸4Mを有している。中間軸4Mは、軸線AX方向の両側で縮径され、縮径された両側の端部4M2、4M3の外周面とケース2との間に一対の軸受け部22,23が配設されている。軸受け部22、23により、中間軸4Mはケース2に回転自在に軸承されている。
16, the stator 3 is fixed to the inner surface of the case 2, and the composite rotor 4 is disposed on the inner diameter side of the stator 3. The composite rotor 4 has a cylindrical intermediate shaft 4M extending on both sides in the axis AX direction. The intermediate shaft 4M is reduced in diameter on both sides in the direction of the axis AX, and a pair of bearing portions 22 and 23 are disposed between the outer peripheral surfaces of the ends 4M2 and 4M3 on both sides of the reduced diameter and the case 2. The intermediate shaft 4M is rotatably supported by the case 2 by the bearing portions 22 and 23.
また、複合回転子4の内径側に回転子5が配置されている。回転子5の中心には出力軸6が貫設されている。出力軸6は軸線AX方向両側に延在し、その両端部61、62はケース2の外部に突出している。出力軸6の各両端部61、62寄りの外周面と中間軸4Mの端部4M2、4M3の内周面との間に一対の軸受け部24、25が配設されている。軸受け部24,25により、出力軸6は中間軸4Mに回転自在に軸承されている。なお、電源部7は、図16では省略されている。
Further, a rotor 5 is disposed on the inner diameter side of the composite rotor 4. An output shaft 6 extends through the center of the rotor 5. The output shaft 6 extends on both sides in the axis AX direction, and both end portions 61 and 62 protrude to the outside of the case 2. A pair of bearing portions 24 and 25 are disposed between the outer peripheral surfaces near both end portions 61 and 62 of the output shaft 6 and the inner peripheral surfaces of the end portions 4M2 and 4M3 of the intermediate shaft 4M. The output shaft 6 is rotatably supported by the intermediate shaft 4M by the bearing portions 24 and 25. The power supply unit 7 is omitted in FIG.
図16の同軸内外配置例では、軸受け部22,23にはアウターモータユニットの回転数が作用し、軸受け部24、25にはインナーモータユニットの相対回転数が作用する。つまり、軸受け部22~25に作用する回転数は、出力軸6のケース2に対する出力回転数よりも小さくなり、受けるストレスが小さくなって信頼性が向上する。
16, the rotational speed of the outer motor unit acts on the bearing portions 22, 23, and the relative rotational speed of the inner motor unit acts on the bearing portions 24, 25. That is, the rotational speed acting on the bearing portions 22 to 25 is smaller than the output rotational speed of the output shaft 6 with respect to the case 2, and the stress received is reduced, improving the reliability.
図17に示されるタンデム配置例12で、固定子30はケース2の内面に固定され、固定子30の内径側に複合回転子400の回転界磁部41、外側コア42、および誘導巻線44が配置されている。外側コア42中心には中間軸4Nが貫設されている。中間軸4Nの軸線AX方向の一側(図中左側)は延在し、その一端部4N1がケース2の外部に突出している。中間軸4Nの一端部4N1寄りの外周面とケース2との間に軸受け部26が配設されている。また、中間軸4Nの軸線AX方向の他側は拡径されて有底円筒部4N2となっている。有底円筒部4N2の内周面に内側コア48および回転子巻線47が配置されている。本実施例では、複合回転子400の外側コア42と内側コア48との間は十分に離隔しており、磁気分離部は不要である。
In the tandem arrangement example 12 shown in FIG. 17, the stator 30 is fixed to the inner surface of the case 2, and the rotating field portion 41, the outer core 42, and the induction winding 44 of the composite rotor 400 are arranged on the inner diameter side of the stator 30. Is arranged. An intermediate shaft 4N is provided in the center of the outer core 42. One side (left side in the figure) of the intermediate shaft 4N in the axis AX direction extends, and one end 4N1 of the intermediate shaft 4N projects to the outside of the case 2. A bearing portion 26 is disposed between the outer peripheral surface of the intermediate shaft 4N near the one end portion 4N1 and the case 2. Further, the other side of the intermediate shaft 4N in the axis AX direction is expanded to form a bottomed cylindrical portion 4N2. An inner core 48 and a rotor winding 47 are disposed on the inner peripheral surface of the bottomed cylindrical portion 4N2. In this embodiment, the outer core 42 and the inner core 48 of the composite rotor 400 are sufficiently separated from each other, and a magnetic separation part is unnecessary.
複合回転子400の内側コア48の内径側に、回転子50が配置されている。回転子50の中心には出力軸60が貫設されている。出力軸60の軸線AX方向の一側(図中右側)は延在し、その一端部63がケース2の外部に突出している。出力軸60の一端部63寄りの外周面とケース2との間に軸受け部27が配設されている。出力軸60は軸線AX方向の他側(図中左側)にも延在しており、その他端部64と中間軸4Nの有底円筒部4N2との間に軸受け部28が配設されている。中間軸4Nおよび出力軸60は、軸受け部26~28の協働により、ケース2に回転自在に軸承されている。なお、電源部7は、図17では省略されている。
The rotor 50 is disposed on the inner diameter side of the inner core 48 of the composite rotor 400. An output shaft 60 extends through the center of the rotor 50. One side (the right side in the figure) of the output shaft 60 in the axis line AX extends, and one end 63 thereof projects outside the case 2. A bearing portion 27 is disposed between the outer peripheral surface of the output shaft 60 near the one end portion 63 and the case 2. The output shaft 60 also extends to the other side in the axis AX direction (left side in the figure), and the bearing portion 28 is disposed between the other end portion 64 and the bottomed cylindrical portion 4N2 of the intermediate shaft 4N. . The intermediate shaft 4N and the output shaft 60 are rotatably supported by the case 2 by the cooperation of the bearing portions 26 to 28. The power source unit 7 is omitted in FIG.
図17のタンデム配置例12では、軸受け部26にはアウターモータユニットの回転数が作用し、軸受け部28にはインナーモータユニットの相対回転数が作用する。そして、軸受け部27にはケース2に対する出力軸60の出力回転数、すなわち、両モータユニットの回転数を加算した大きな回転数が作用する。したがって、特に出力回転数を大きくしたい場合には、潤滑用のオイルを直接噴射するなどの方策により、軸受け部27の性能向上、信頼性向上を図ることが好ましい。反面、アウターモータユニットとインナーモータユニットの製作寸法諸元が類似するので、両モータユニットの出力特性を揃えることは比較的容易である。
In the tandem arrangement example 12 in FIG. 17, the rotational speed of the outer motor unit acts on the bearing portion 26, and the relative rotational speed of the inner motor unit acts on the bearing portion 28. The bearing portion 27 is subjected to a large rotational speed obtained by adding the rotational speed of the output shaft 60 with respect to the case 2, that is, the rotational speeds of both motor units. Therefore, particularly when it is desired to increase the output rotational speed, it is preferable to improve the performance and reliability of the bearing portion 27 by measures such as direct injection of lubricating oil. On the other hand, since the manufacturing dimensions of the outer motor unit and the inner motor unit are similar, it is relatively easy to make the output characteristics of both motor units uniform.
なお、各実施形態および実施例で、複合回転子4、40、400および出力軸6、60の回転位相を検出する回転角度センサを設け、インバータ制御部73で回転位相を参照しつつ制御を行うことが好ましい。また、各モータユニットの固定子および回転子を同軸内外に配置した例を示したが、これに限定されず、固定子および回転子を軸線方向に並べた構造のモータユニットであってもよい。
In each embodiment and example, a rotation angle sensor that detects the rotation phase of the composite rotors 4, 40, 400 and the output shafts 6, 60 is provided, and the inverter control unit 73 performs control while referring to the rotation phase. It is preferable. Moreover, although the example which has arrange | positioned the stator and rotor of each motor unit in coaxial inside / outside was shown, it is not limited to this, The motor unit of the structure which arranged the stator and the rotor in the axial direction may be sufficient.
また、複合回転子4または回転子5に外部トルクを入力および遮断できる構成とすることができる。これにより、多重回転子形電動機1で発生したトルクを外部トルクに加えて出力軸7から出力できる。あるいは、複合回転子4をケースに対して着脱可能に固定する機構を設けることができる。これにより、負荷が軽い場合に、複合回転子4を固定してインナー(第2)モータユニットのみを用い、アウター(第1)モータユニットの損失を節約して効率を向上できる。
Further, it can be configured such that external torque can be input to and interrupted from the composite rotor 4 or the rotor 5. Thereby, the torque generated in the multi-rotor motor 1 can be output from the output shaft 7 in addition to the external torque. Alternatively, a mechanism for detachably fixing the composite rotor 4 to the case can be provided. Thus, when the load is light, the composite rotor 4 is fixed and only the inner (second) motor unit is used, and the loss of the outer (first) motor unit can be saved to improve the efficiency.
さらに、2つの複合回転子を備えることも可能である。つまり、固定子と第1複合回転子との間、第1および第2複合回転子の間、第2複合回転子と回転子との間にそれぞれモータユニットを構成し、電源部から固定子の巻線に周波数の異なる三つの交流電流を重累して通電し、2つの複合回転子で順次誘導起電力を生起するとともに回転数を加算し、回転子で大きな出力回転数を得ることができる。本発明は、その他様々な変形や応用が可能である。
Furthermore, it is possible to provide two composite rotors. That is, a motor unit is formed between the stator and the first composite rotor, between the first and second composite rotors, and between the second composite rotor and the rotor, and the stator unit is connected to the stator from the power supply unit. It is possible to obtain a large output rotational speed with the rotor by sequentially applying three alternating currents with different frequencies to the windings, generating an induced electromotive force sequentially with the two composite rotors, and adding the rotational speed. . The present invention can be variously modified and applied.
本発明の多重回転子形電動機は、ハイブリッド車両や電気自動車の駆動源などに利用でき、特に高速回転が必要とされる用途に適する。
The multi-rotor electric motor of the present invention can be used for a drive source of a hybrid vehicle or an electric vehicle, and is particularly suitable for an application that requires high-speed rotation.
1、10:多重回転子形電動機
11:同軸内外配置例 12:タンデム配置例
2:ケース 21~28:軸受け部
3、30:固定子
31:固定子巻線 31U1、31U2:U相コイル
31V1、31V2:V相コイル 31W1:W相コイル
32:コア
4、40、400:複合回転子
41:回転界磁部 42:外側コア
44:誘導巻線 44U1、44U2:U相コイル
44V1、44V2:V相コイル 44W1:W相コイル
45:磁気分離部
47:回転子巻線 47U1、47U2:U相コイル
47V1、47V2:V相コイル 47W1:W相コイル
48:内側コア
49:接続リード
4M:中間軸 4N:中間軸
5、50:回転子 51:出力界磁部 52:コア
6、60:出力軸
7:電源部
71:直流電源装置 72:インバータ装置 73:インバータ制御部
8:トロイダルコイル群
81~84:U-V相トロイダルコイル
85~87:V-U相トロイダルコイル
88、89:W-W相トロイダルコイル DESCRIPTION OFSYMBOLS 1, 10: Multiple rotor type | mold motor 11: Coaxial inside / outside example 12: Tandem arrangement example 2: Case 21-28: Bearing part 3, 30: Stator 31: Stator winding 31U1, 31U2: U-phase coil 31V1, 31V2: V phase coil 31W1: W phase coil 32: Core 4, 40, 400: Composite rotor 41: Rotating field part 42: Outer core 44: Induction winding 44U1, 44U2: U phase coil 44V1, 44V2: V phase Coil 44W1: W phase coil 45: Magnetic separation unit 47: Rotor winding 47U1, 47U2: U phase coil 47V1, 47V2: V phase coil 47W1: W phase coil 48: Inner core 49: Connection lead 4M: Intermediate shaft 4N: Intermediate shaft 5, 50: Rotor 51: Output field part 52: Core 6, 60: Output shaft 7: Power supply part 71: DC power supply device 72: Inverter device 73: Inverter control unit 8: Toroidal coil group 81-84: U-V phase toroidal coil 85-87: VU phase toroidal coil 88, 89: WW phase toroidal coil
11:同軸内外配置例 12:タンデム配置例
2:ケース 21~28:軸受け部
3、30:固定子
31:固定子巻線 31U1、31U2:U相コイル
31V1、31V2:V相コイル 31W1:W相コイル
32:コア
4、40、400:複合回転子
41:回転界磁部 42:外側コア
44:誘導巻線 44U1、44U2:U相コイル
44V1、44V2:V相コイル 44W1:W相コイル
45:磁気分離部
47:回転子巻線 47U1、47U2:U相コイル
47V1、47V2:V相コイル 47W1:W相コイル
48:内側コア
49:接続リード
4M:中間軸 4N:中間軸
5、50:回転子 51:出力界磁部 52:コア
6、60:出力軸
7:電源部
71:直流電源装置 72:インバータ装置 73:インバータ制御部
8:トロイダルコイル群
81~84:U-V相トロイダルコイル
85~87:V-U相トロイダルコイル
88、89:W-W相トロイダルコイル DESCRIPTION OF
Claims (11)
- 固定子回転磁界を形成する固定子巻線を有してケースに固定された固定子と、
前記固定子回転磁界との電磁相互作用によりトルクを生起する回転界磁部および、前記固定子回転磁界との電磁誘導作用により誘導起電力を生起する誘導巻線および、前記誘導巻線に電気接続されて前記固定子回転磁界と同じ回転方向の回転子回転磁界を形成する回転子巻線を有し、前記ケースに回転自在に軸承された複合回転子と、
前記回転子回転磁界との電磁相互作用によりトルクを生起する出力界磁部を有し、前記複合回転子と同じ方向にかつ前記複合回転子よりも高速で回転可能な回転子と、
前記回転子に結合され、前記ケースまたは前記複合回転子に回転自在に軸承された出力軸と、
前記固定子巻線に周波数の異なる二つの交流電流を重累して通電する電源部と、
を備える多重回転子形電動機。 A stator having a stator winding that forms a stator rotating magnetic field and fixed to the case;
A rotating field portion that generates torque by electromagnetic interaction with the stator rotating magnetic field, an induction winding that generates induced electromotive force by electromagnetic induction action with the stator rotating magnetic field, and an electrical connection to the induction winding A rotor winding that forms a rotor rotating magnetic field in the same rotational direction as the stator rotating magnetic field, and a composite rotor that is rotatably supported by the case;
An output field part that generates torque by electromagnetic interaction with the rotor rotating magnetic field, and a rotor that can rotate in the same direction as the composite rotor and at a higher speed than the composite rotor;
An output shaft coupled to the rotor and rotatably supported by the case or the composite rotor;
A power supply unit for energizing two alternating currents having different frequencies in the stator winding;
A multi-rotor electric motor comprising: - 請求項1において、前記電源部が前記固定子巻線に通電する周波数f1の第1交流電流により形成される第1固定子回転磁界の磁束Φ1、回転数n1、および前記固定子巻線と前記回転界磁部との間のトルクT1とし、周波数f2の第2交流電流により形成される第2固定子回転磁界の磁束Φ2、回転数n2、および前記固定子巻線と前記回転界磁部との間のトルクT2とし、前記回転子巻線と前記出力界磁部との間のトルクToutとしたとき、
前記磁束Φ1<前記磁束Φ2、かつ前記トルクT1<前記トルクT2、かつ(前記トルクT2-前記トルクT1)>前記トルクToutであり、
さらに、前記回転数n1<前記回転数n2である多重回転子形電動機。 2. The magnetic flux Φ <b> 1 of the first stator rotating magnetic field formed by the first alternating current having a frequency f <b> 1 that is supplied to the stator winding by the power source unit, the rotation speed n <b> 1, the stator winding, and the stator winding The torque T1 between the rotating field portion and the magnetic flux Φ2 of the second stator rotating magnetic field formed by the second alternating current having the frequency f2, the rotation speed n2, and the stator winding and the rotating field portion And a torque Tout between the rotor winding and the output field part,
The magnetic flux Φ1 <the magnetic flux Φ2, the torque T1 <the torque T2, and (the torque T2−the torque T1)> the torque Tout,
Furthermore, a multi-rotor motor in which the rotational speed n1 <the rotational speed n2. - 請求項2において、前記第1固定子回転磁界と前記第2固定子回転磁界の回転方向が同じ場合は、前記回転数n1<前記回転数n2であり、
前記第1固定子回転磁界と前記第2固定子回転磁界の回転方向が異なる場合は前記回転数n1を負値で表し、0<(前記回転数n1の絶対値)<(2×前記回転数n2)である多重回転子形電動機。 In claim 2, when the rotation direction of the first stator rotating magnetic field and the second stator rotating magnetic field are the same, the rotation speed n1 <the rotation speed n2.
When the rotation directions of the first stator rotating magnetic field and the second stator rotating magnetic field are different, the rotation speed n1 is expressed as a negative value, and 0 <(the absolute value of the rotation speed n1) <(2 × the rotation speed). n2) a multi-rotor motor. - 請求項1~3のいずれか一項において、前記複合回転子の前記回転界磁部および前記誘導巻線が有するコアと、前記回転子巻線が有するコアとの間を磁気的に分離する磁気分離部を有する多重回転子形電動機。 The magnetic field for magnetically separating between the core of the rotor winding and the core of the rotor winding and the core of the rotor winding of the composite rotor according to any one of claims 1 to 3. A multi-rotor motor having a separation unit.
- 請求項1~4のいずれか一項において、前記固定子の前記固定子巻線および前記複合回転子の前記回転界磁部で構成される第1モータユニットと、前記複合回転子の前記回転子巻線および前記回転子の前記出力界磁部で構成される第2モータユニットとは、回転数とトルクとの関係を示す出力特性が互いにほぼ同一である多重回転子形電動機。 The first motor unit according to any one of claims 1 to 4, comprising the stator winding of the stator and the rotating field portion of the composite rotor, and the rotor of the composite rotor The second motor unit configured by the winding and the output field portion of the rotor is a multi-rotor electric motor in which output characteristics indicating the relationship between the rotational speed and the torque are substantially the same.
- 請求項5において、前記第2モータユニットは、前記第1モータユニットの回転数の2倍まで出力可能であることを特徴とする多重回転子形電動機。 6. The multi-rotor motor according to claim 5, wherein the second motor unit can output up to twice the number of rotations of the first motor unit.
- 請求項1~6のいずれか一項において、前記固定子の前記固定子巻線、前記複合回転子の前記誘導巻線および前記回転子巻線は全て三相結線されており、かつ、前記誘導巻線と前記回転子巻線とは二相が入れ替えられて電気接続されている多重回転子形電動機。 7. The stator winding according to claim 1, wherein the stator winding of the stator, the induction winding of the composite rotor, and the rotor winding are all three-phase connected, and the induction A multi-rotor electric motor in which the winding and the rotor winding are electrically connected with two phases interchanged.
- 請求項1~7のいずれか一項において、前記固定子の前記固定子巻線、前記複合回転子の前記誘導巻線および前記回転子巻線は、すべて同じコイル構成とされかつ周方向の相の配列順も一致している多重回転子形電動機。 8. The stator winding according to claim 1, wherein the stator winding of the stator, the induction winding of the composite rotor, and the rotor winding all have the same coil configuration and are arranged in a circumferential direction. A multi-rotor motor with the same arrangement order.
- 請求項8において、前記複合回転子の前記誘導巻線および前記回転子巻線は三相結線されており、周方向に関する前記複合回転子の前記誘導巻線の三相の位置と前記回転子巻線の三相の位置とは一致する多重回転子形電動機。 9. The induction winding and the rotor winding of the composite rotor according to claim 8, wherein the induction winding and the rotor winding are three-phase connected, and the three-phase position of the induction winding of the composite rotor in the circumferential direction and the rotor winding A multi-rotor motor that matches the three-phase position of the wire.
- 請求項6~9のいずれか一項において、前記複合回転子の前記誘導巻線および前記回転子巻線の中でそれぞれY結線またはΔ結線を行って各相端子を構成し、前記誘導巻線および前記回転子巻線の対応する各相端子のいずれか二相を入れ替えて電気接続する多重回転子形電動機。 10. The induction winding according to claim 6, wherein each phase terminal is configured by performing Y connection or Δ connection in the induction winding and the rotor winding of the composite rotor, respectively. And a multi-rotor electric motor in which any two phases of corresponding phase terminals of the rotor winding are switched and electrically connected.
- 請求項1~6のいずれか一項において、前記複合回転子の前記誘導巻線および前記回転子巻線に代えてトロイダルコイル群を用いる多重回転子形電動機。 The multi-rotor motor according to any one of claims 1 to 6, wherein a toroidal coil group is used in place of the induction winding and the rotor winding of the composite rotor.
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JP2009073472A (en) * | 2007-08-27 | 2009-04-09 | Toyota Central R&D Labs Inc | Power transmission device |
JP2010081753A (en) * | 2008-09-26 | 2010-04-08 | Denso Corp | Rotary electric machine |
JP2010093998A (en) * | 2008-10-10 | 2010-04-22 | Denso Corp | Rotary electric machine |
-
2010
- 2010-12-17 JP JP2010281490A patent/JP5299416B2/en not_active Expired - Fee Related
-
2011
- 2011-11-25 WO PCT/JP2011/077151 patent/WO2012081374A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH09121404A (en) * | 1995-10-25 | 1997-05-06 | Denso Corp | Drive device for vehicle |
JP2000224836A (en) * | 1999-01-29 | 2000-08-11 | Nissan Motor Co Ltd | Multilayer motor |
JP2009073472A (en) * | 2007-08-27 | 2009-04-09 | Toyota Central R&D Labs Inc | Power transmission device |
JP2010081753A (en) * | 2008-09-26 | 2010-04-08 | Denso Corp | Rotary electric machine |
JP2010093998A (en) * | 2008-10-10 | 2010-04-22 | Denso Corp | Rotary electric machine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107623418A (en) * | 2016-07-13 | 2018-01-23 | 铃木株式会社 | Electric rotating machine |
WO2018054906A1 (en) * | 2016-09-22 | 2018-03-29 | Volabo Gmbh | Electric machine |
Also Published As
Publication number | Publication date |
---|---|
JP2012130206A (en) | 2012-07-05 |
JP5299416B2 (en) | 2013-09-25 |
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