WO2012073959A1 - ステータ - Google Patents
ステータ Download PDFInfo
- Publication number
- WO2012073959A1 WO2012073959A1 PCT/JP2011/077541 JP2011077541W WO2012073959A1 WO 2012073959 A1 WO2012073959 A1 WO 2012073959A1 JP 2011077541 W JP2011077541 W JP 2011077541W WO 2012073959 A1 WO2012073959 A1 WO 2012073959A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stator
- peripheral wall
- holder
- stator holder
- wall portion
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
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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
- B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- 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
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- 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
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/50—Structural details of electrical machines
-
- 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
- B60L2270/00—Problem solutions or means not otherwise provided for
- B60L2270/10—Emission reduction
- B60L2270/14—Emission reduction of noise
- B60L2270/142—Emission reduction of noise acoustic
-
- 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
- B60L2270/00—Problem solutions or means not otherwise provided for
- B60L2270/10—Emission reduction
- B60L2270/14—Emission reduction of noise
- B60L2270/145—Structure borne vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
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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
-
- 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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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 a stator used in a rotating electric machine such as an electric motor or a generator.
- a rotating electric machine such as an electric motor or a generator.
- stator of an electric motor or the like As a stator of an electric motor or the like, a cylindrical stator holder is bolted to a housing, and an annular stator group in which a plurality of stator pieces around which a coil is wound is arranged in an annular shape is press-fitted and held inside the stator holder, 2. Description of the Related Art A wiring member for supplying power to a coil of each stator piece is provided along an annular stator group. Further, the stator holder of this type of electric motor is provided with a flange portion fixed to the housing on one end side in the axial direction.
- the stator holder 103 includes a peripheral wall portion 104, and includes a flange portion 112 on one end side in the axial direction of the peripheral wall portion 104.
- the peripheral wall portion 104 includes a small-diameter cylindrical portion 131, a tapered cylindrical portion 132, a large-diameter cylindrical portion 133, and arcuate surfaces 134a and 134b that smoothly connect the respective cylindrical portions.
- the introduction part 107 includes a large-diameter cylindrical part 133 of the peripheral wall part 104, a tapered cylindrical part 132, and arcuate surfaces 134a and 134b.
- the tapered cylindrical portion 132 is formed so that the inner diameter of the peripheral wall portion 104 of the stator holder 103 continuously contracts from the other axial end to the one axial end. Accordingly, the conventional stator can press-fit the annular stator group not only from the flange portion 112 side but also from the introduction portion 107 on the opposite side when the annular stator group is press-fitted into the stator holder 103. Yes.
- the natural frequency of the annular stator group is low, and the stator pieces constituting the annular stator group are likely to vibrate when the electric motor rotates at a low speed.
- vibration is more easily transmitted to the stator holder.
- the conventional stator holder 103 has low rigidity in the vicinity of the introduction portion 107, there is a problem that vibration of the annular stator group cannot be suppressed and vibration noise is generated.
- the present invention has been made in consideration of such circumstances, and an object thereof is to provide a stator capable of suppressing vibration noise by suppressing radial deformation of the stator holder.
- An aspect of the present invention includes a plurality of stator pieces each having a coil wound thereon; a stator holder that supports the plurality of stator pieces arranged in an annular shape on a peripheral wall portion; and disposed outside the stator holder. And a housing for supporting the stator holder, the stator holder continuously projecting radially outward from the edge on one axial end side thereof, and fixed to the housing; And a reinforcing portion for restricting the radial vibration of the stator holder on the outer surface of the peripheral wall portion of the stator holder.
- the reinforcing portion may be another flange portion continuously projecting radially outward from an edge on the other axial end side of the peripheral wall portion of the stator holder.
- the reinforcing portion is a plurality of convex portions provided over a corner portion between the outer peripheral surface of the peripheral wall portion and the flange portion, and these convex portions are in the circumferential direction. And may be arranged at predetermined intervals along each other.
- the convex portion may have a shape that gradually protrudes from the flange portion and reaches the peripheral wall portion.
- the reinforcing portion may be a ridge continuously projecting on the outer peripheral surface of the peripheral wall portion.
- the radial deformation of the stator holder can be suppressed by providing the reinforcing portion.
- the vibration of the stator piece which comprises a stator can be suppressed, and a vehicle interior sound can be reduced.
- the other flange portion is provided over the entire circumference of the peripheral wall portion, deformation of the peripheral wall portion in the radial direction is suppressed by the flange portion and the other flange portion.
- the rigidity of the holder can be further increased.
- the inner peripheral surface of a surrounding wall part can be made flat, many areas which a some stator piece and the inner peripheral surface of a surrounding wall part contact
- abut can be ensured.
- the vibration mode of the stator holder can be adjusted by changing the radial width of the other flange portion.
- the convex portion can prevent the peripheral wall portion from collapsing with respect to the flange portion, and can suppress deformation of the peripheral wall portion.
- the circumferential rigidity can be adjusted by changing the circumferential position of the convex portion corresponding to the shape of the flange portion. According to the above aspect (4), it is possible to secure a larger contact area between the peripheral wall portion and the plurality of stator pieces.
- FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. It is a graph which shows the relationship between the rotation speed of an electric motor, and the vibration acceleration of a stator piece, and is a graph which shows a comparison with 1st Embodiment and a prior art.
- FIG. 9 is a sectional view taken along line BB in FIG. It is a perspective view of the stator holder of 3rd Embodiment of this invention. It is CC sectional drawing of FIG. It is sectional drawing of the conventional stator holder. It is a principal part expanded sectional view of the conventional stator holder.
- the hybrid vehicle includes an internal combustion engine E (engine) and an electric motor M (rotary electric machine) as drive sources, and an output shaft ES of the internal combustion engine E is connected to a rotor R that rotates inside the stator 1 in the electric motor M. And the input shaft TS of the transmission T is connected.
- the driving force of the internal combustion engine E and the electric motor M is transmitted to driving wheels W (wheels) via the transmission T, and the hybrid vehicle travels using at least one power of the internal combustion engine E and the electric motor M as a driving force.
- the electric motor M when electric power is transmitted from the drive wheel W side to the electric motor M side during deceleration, the electric motor M functions as a generator, and the kinetic energy of the vehicle body is converted into electric energy by regenerative braking to a power storage device (not shown). to recover.
- the stator 1 is supported by a housing 2 made of an aluminum alloy, an iron stator holder 3 fixed in an internal space 10 of the housing 2, and a peripheral wall portion 4 of the stator holder 3.
- An annular stator group 5 and an annular power distribution member 6 (bus ring) are provided.
- the housing 2 forms the housing of the electric motor M, is sandwiched between the internal combustion engine E and the transmission T, and is connected and fixed thereto.
- the housing 2 includes an annular housing cylinder portion 8 and a housing flange portion 9 provided so as to project radially inward (cylindrical radial direction) at one end in the axial direction (cylindrical axis direction) of the housing cylinder portion 8.
- the internal space 10 of the housing 2 is formed in a shape that can accommodate the stator holder 3 and the annular stator group 5.
- the housing 2 includes a terminal box 11 that is continuous with the internal space 10.
- the stator holder 3 includes a cylindrical peripheral wall portion 4, a flange portion 12 provided so as to project radially outward at one axial end portion of the peripheral wall portion 4, and a peripheral wall
- the reinforcing part 7 provided on the outer peripheral surface 4 b of the part 4 is provided.
- the reinforcing portion 7 is a second flange portion (other flange portion) 31 that protrudes radially outward of the stator holder 3 at the other axial end edge of the peripheral wall portion 4.
- the peripheral wall portion 4 of the stator holder 3 is formed in a shape capable of accommodating the annular stator group 5 by press-fitting therein.
- the flange portion 12 is provided with a plurality of bolt mounting holes 13, and bolts 14 (see FIG. 3) inserted through the bolt mounting holes 13 are provided in the housing flange portion 9 of the housing 2.
- the stator holder 3 is fixed to the housing 2 by being screwed into the bolt mounting holes 15.
- the amount of protrusion in the radial direction of the flange portion 12 is not constant, and the amount of protrusion is increased in accordance with the position where the bolt mounting hole 13 is formed.
- the second flange portion 31 has the same thickness as the peripheral wall portion 4 and the flange portion 12, and the corner portion formed by the second flange portion 31 and the peripheral wall portion 4 includes:
- the circular arc surface 34 is formed by making a round chamfering shape over the entire circumference.
- the 2nd flange part 31 is formed by the bending process by press work.
- the radial width W of the second flange portion 31 and the R dimension of the circular arc surface 34 are based on the strength required for the stator 1, depending on the weight specifications of the stator 1, the installation space of the stator holder 3, and the like. Set as appropriate.
- the annular stator group 5 is configured by arranging a predetermined number of stator pieces 16 (24 in this embodiment) in an annular shape.
- Each stator piece 16 includes a split iron core 17, an insulating resin 18 attached to the split iron core 17, and a stator coil (coil) 20.
- the split iron core 17 is configured by laminating a substantially T-shaped magnetic steel plate composed of a back yoke on the outer peripheral side of the annular stator group 5 and magnetic teeth protruding on the inner peripheral side of the annular stator group 5. It is wound around the split iron core 17 via an insulating resin 18.
- the power distribution member 6 is arranged concentrically by shifting U-phase, V-phase, and W-phase bus rings (feed lines) 21U, 21V, and 21W having the same diameter ring shape in the axial direction.
- These three-phase bus rings 21U, 21V, 21W are configured to be bundled by resin mold portions 25 at predetermined intervals in the circumferential direction.
- Each bus ring 21U, 21V, 21W is provided with connecting portions 24 projecting radially inward at predetermined intervals in the circumferential direction, and each phase connecting portion 24 is connected to another phase connecting portion 24.
- the connection terminals 23 extend radially outward from the bus rings 21U, 21V, 21W of the respective phases.
- connection portions 24 of the bus rings 21U, 21V, and 21W for each phase are connected to one end of the stator coil 20 of the corresponding stator piece 16, and the connection terminal 23 for each phase is
- the power supply terminals 28U, 28V, 28W in the terminal box 11 are connected.
- the other ends of the stator coils 20 of the adjacent stator pieces 16 are also connected by a predetermined method such as using a neutral point bus bar.
- stator coils 20 of the U-phase stator pieces 16 are connected via the bus ring 21U, and one ends of the stator coils 20 of the V-phase stator pieces 16 are connected via the bus ring 21V.
- One end of each of the stator coils 20 of the W-phase stator pieces 16 is connected via a bus ring 21W.
- stator holder 3 is attached to the housing 2.
- annular stator group 5 formed by arranging the stator pieces 16 in an annular shape in advance is press-fitted into the stator holder 3.
- the annular stator group 5 can be easily press-fitted into the stator holder 3 by forming the arc surface 34 on the other axial end of the stator holder 3 (on the opposite side of the flange portion 12).
- FIG. 6 the measurement result which measured the vibration acceleration of the radial direction of the arbitrary stator pieces 16 at the time of driving the motor M is shown.
- the vertical axis represents acceleration
- the horizontal axis represents the number of rotations (rpm).
- “Conventional” shows the result (broken line) when using the stator provided with the conventional stator holder 103 shown in FIG. 12, and “After countermeasure” shows the result (solid line) when using the stator according to the present embodiment. Show.
- the acceleration of the stator piece 16 was measured by installing an accelerometer on an arbitrary stator piece 16. According to this measurement result, by using the stator 1 of the present embodiment, the vibration acceleration of the stator piece 16 can be significantly reduced in the range of the rotational speed of the electric motor M from 3000 rpm to 3500 rpm.
- FIG. 7 the measurement result which measured the vehicle interior sound of the hybrid vehicle is shown.
- the vertical axis represents the sound pressure
- the horizontal axis represents the rotation speed (rpm).
- “Conventional” shows the result (broken line) when using the stator provided with the conventional stator holder 103 shown in FIG. 12, and “After countermeasure” shows the result (solid line) when using the stator according to the present embodiment. Show.
- the sound pressure is greatly reduced in the range of 3000 rpm to 3500 rpm of the rotation speed of the motor M, which is a region where the noise of the motor M is noticeable. We were able to.
- the flange portion 12 is provided at one axial end portion of the peripheral wall portion 4 of the stator holder 3 and the second flange portion 31 continuously projecting radially outward is provided at the other axial end edge. Therefore, the radial deformation of the stator holder 3 can be suppressed. Thereby, the vibration of the stator pieces 16 constituting the stator 1 can be suppressed, and the vehicle interior noise can be reduced. Further, since the second flange portion 31 is provided over the entire circumference of the peripheral wall portion 4, the flange portion 12 and the second flange portion 31 suppress deformation in the radial direction of the peripheral wall portion 4, and the stator holder 3. The rigidity can be further increased.
- the vibration mode of the stator holder 3 can be adjusted by changing the radial width W of the second flange portion 31.
- the reinforcing portion 7 of the stator holder 3 ⁇ / b> B of the present embodiment includes a plurality of convex portions 32 provided over the corner portion between the outer peripheral surface 4 b of the peripheral wall portion 4 and the flange portion 12. It is.
- the plurality of convex portions 32 are arranged at predetermined intervals in the circumferential direction of the peripheral wall portion 4. Specifically, each convex portion 32 is deformed so that a corner portion formed by the peripheral wall portion 4 and the flange portion 12 protrudes radially outward at an arbitrary position in the circumferential direction of the stator holder 3B.
- the convex portion 32 includes a ridge line portion 32a and side surfaces 32b and 32b.
- the ridge line portion 32a is a line connecting an arbitrary point P1 in the vicinity of the central portion in the axial direction of the peripheral wall portion 4 and a point P2 on the plane including the axis of the peripheral wall portion 4 and P1 and on the flange portion 12.
- the side surfaces 32b and 32b are surfaces provided so as to be symmetric with respect to the ridge line portion 32a and to intersect with each other at an angle of about 90 °.
- the convex portion 32 is formed such that the protruding height in the radial direction gradually decreases from the flange portion 12 and reaches the peripheral wall portion 4. Similar to the second flange portion 31 of the first embodiment, the convex portions 32 are formed by press working. As described above, the convex portions 32... Are arranged at predetermined positions at arbitrary positions in the circumferential direction. The position of each convex portion 32 is preferably determined as appropriate according to the shape of the flange portion 12, and particularly preferably formed at a location where the radial width of the flange portion 12 is small.
- an introduction portion comprising a tapered tubular portion 41 and a large-diameter tubular portion 42. 43 is provided.
- each convex part 32 is a convex part from the axial direction one end part of the surrounding wall part 4 to the other end part by making it the shape which the protrusion height reduces gradually from the flange part 12 and reaches the surrounding wall part 4.
- stator holder 3B can be enhanced without changing the shape of the other end edge in the axial direction of the peripheral wall portion 4 of the stator holder 3B.
- the reinforcing portion 7 of the stator holder 3 ⁇ / b> C of the present embodiment is a ridge 33 that continuously protrudes from the outer surface of the peripheral wall portion 4.
- the ridge 33 projects outward in the radial direction at a substantially central portion in the axial direction of the peripheral wall portion 4.
- the ridge 33 bends the circumferential wall portion 4 radially outward over the entire circumference at a substantially central portion in the axial direction of the circumferential wall portion 4, and further folds radially inward at a predetermined radial position.
- the ridge 33 is formed by pressing.
- the radial width W2 of the ridge 33 is appropriately set according to the weight specification of the stator 1, the installation space of the stator holder 3C, and the like.
- the vibration mode of the stator holder 3C can be adjusted by changing the radial width W2 of the ridge 33.
- the present invention is not limited to the embodiment described above.
- the second flange portion of the stator holder 3 is provided over the entire circumference of the edge portion of the peripheral wall portion 4, but is provided intermittently along the edge portion of the peripheral wall portion 4. Also good.
- line 33 were set as the structure provided integrally by press molding, it is good also as a structure which prepares an annular member separately and joins this member to the surrounding wall part 4 by methods, such as welding. .
- the present invention is applied to a hybrid vehicle and a stator of a driving motor.
- the present invention can also be applied to a driving motor in an electric vehicle and other motors and generators. It is.
- stator capable of suppressing vibration noise by suppressing radial deformation of the stator holder.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
本願は、2010年12月3日に、日本に出願された日本国特願2010-270700号に基づき優先権を主張し、その内容をここに援用する。
(1)本発明に係る一態様は、コイルが巻回された複数のステータ片と;周壁部において前記複数のステータ片を環状に配列して支持するステータホルダと;前記ステータホルダの外側に配置されてこのステータホルダを支持するハウジングと;を備え、前記ステータホルダが、その軸線方向一端側の縁からその径方向外側に連続的に張り出してかつ、前記ハウジングに対して固定されるフランジ部と、前記ステータホルダの前記周壁部外面に、このステータホルダの前記径方向の振動を規制する補強部と、を備える。
上記(2)の態様によれば、他のフランジ部が周壁部の全周に亘って設けられていることにより、フランジ部と他のフランジ部によって周壁部の径方向への変形を抑え、ステータホルダの剛性をより高めることができる。
また、周壁部の内周面を平坦とすることができるため、複数のステータ片と周壁部の内周面とが当接する面積を多く確保することができる。
また、他のフランジ部の径方向の幅を変更することによって、ステータホルダの振動モードを調整することができる。
上記(3)の態様によれば、凸部によってフランジ部に対する周壁部の倒れを防止して、周壁部の変形を抑えることができる。
また、フランジ部の形状に対応して凸部の周方向の位置を変更することによって、周方向の剛性を調整することができる。
上記(4)の態様によれば、周壁部と複数のステータ片との当接面積をより多く確保することができる。
上記(5)の態様によれば、ステータホルダの周壁部の軸線方向他端縁の形状を変更することなく、周壁部自体の径方向への変形を抑え、全周に亘ってステータホルダの剛性を高めることができる。
以下、本発明のステータの第1実施形態について、図面を参照して説明する。
本実施形態のステータは、ハイブリッド車両の駆動用電動機に用いられている。図1に示すように、ハイブリッド車両は、駆動源として内燃機関E(エンジン)と電動機M(回転電機)を備え、電動機Mにおいてステータ1の内側で回転するロータRに内燃機関Eの出力軸ES及びトランスミッションTの入力軸TSが連結されている。内燃機関Eと電動機Mの駆動力はトランスミッションTを介して駆動輪W(車輪)に伝達され、内燃機関Eと電動機Mの少なくとも一方の動力を駆動力としてハイブリッド車両は走行する。また、このハイブリッド車両は、減速時に駆動輪W側から電動機M側に電力が伝達されると、電動機Mは発電機として機能し、回生制動により車体の運動エネルギーを電気エネルギーとして図示しない蓄電装置に回収する。
ハウジング2は、環状のハウジング筒部8と、ハウジング筒部8の軸線方向(円筒軸方向)一端部に径方向(円筒径方向)内方に張り出すように設けられたハウジングフランジ部9とを備え、ハウジング2の内部空間10は、ステータホルダ3及び環状ステータ群5を収納可能な形状に形成されている。また、ハウジング2は、内部空間10に連なるターミナルボックス11を備えている。
第2フランジ部31の径方向の幅Wや、円弧面34のR寸法は、ステータ1に要求される強度を基本に、ステータ1の重量の仕様や、ステータホルダ3の設置空間等に応じて適宜設定される。
まず、ハウジング2にステータホルダ3を取り付ける。次に、予めステータ片16を円環状に配列して形成しておいた環状ステータ群5をステータホルダ3に圧入する。この際、ステータホルダ3の軸線方向他端側(フランジ部12の反対側)に円弧面34が形成されていることによって、環状ステータ群5をステータホルダ3に容易に圧入することができる。
図6のグラフにおいて、縦軸は加速度、横軸は回転数(rpm)である。「従来」は図12に示す従来のステータホルダ103を備えたステータを使用した場合の結果(破線)を示し、「対策後」は本実施形態に係るステータを使用した場合の結果(実線)を示している。ステータ片16の加速度は、任意のステータ片16に加速度計を設置することで計測した。
この測定結果によれば、本実施形態のステータ1を使用することによって、電動機Mの回転数の3000rpm~3500rpmの範囲において、ステータ片16の振動加速度を大幅に低減することができた。
図7において、縦軸は音圧、横軸は回転数(rpm)である。「従来」は図12に示す従来のステータホルダ103を備えたステータを使用した場合の結果(破線)を示し、「対策後」は本実施形態に係るステータを使用した場合の結果(実線)を示している。
この測定結果によれば、本実施形態のステータ1を使用することによって、聴覚上、電動機Mの騒音が目立つ領域である電動機Mの回転数の3000rpm~3500rpmの範囲において、音圧を大幅に低減することができた。
また、第2フランジ部31が周壁部4の全周に亘って設けられていることにより、フランジ部12と第2フランジ部31によって周壁部4の径方向への変形を抑え、ステータホルダ3の剛性をより高めることができる。
また、周壁部4の内周面4aが平坦であるため、環状ステータ群5と周壁部4の内周面4aとが当接する面積を多く確保することができる。
また、第2フランジ部31の径方向の幅Wを変更することによって、ステータホルダ3の振動モードを調整することができる。
次に、この発明の第2実施形態を図面に基づいて説明する。この実施形態において、ステータホルダ3の補強部7以外の構造は、第1実施形態と同様であるので、説明は省略する。
上述したように、凸部32…は、周方向の任意の位置に、所定間隔を隔てて配設される。各々の凸部32の位置は、フランジ部12の形状に応じて適宜決定することが好ましく、特にフランジ部12の径方向の幅が小さい箇所などに形成することが好ましい。
また、フランジ部12の形状に対応して凸部32…の周方向の位置を変更することによって、周方向の剛性を調整することができる。
また、各々の凸部32は、フランジ部12から徐々に突出高さが減少して周壁部4に至る形状とすることによって、周壁部4の軸線方向一端部から他端部に亘って凸部を設けた場合と比較して、周壁部4とステータ片16との当接面積をより多く確保することができる。
さらに、ステータホルダ3Bの周壁部4の軸線方向他端縁の形状を変更することなく、ステータホルダ3Bの剛性を高めることができる。
次に、この発明の第3実施形態を図面に基づいて説明する。この実施形態において、ステータホルダ3の補強部7以外の構造は、第1及び第2実施形態と同様であるので、説明は省略する。
具体的には、凸条33は、周壁部4の軸線方向の略中央部において、周壁部4を全周に亘って径方向外側に折り曲げ、更に、径方向の所定位置で径方向内側に折り返した形状である。凸条33はプレス加工により形成される。凸条33の径方向の幅W2は、第1実施形態と同様に、ステータ1の重量の仕様や、ステータホルダ3Cの設置空間等に応じて適宜設定される。
また、凸条33の径方向の幅W2を変更することによって、ステータホルダ3Cの振動モードを調整することができる。
なお、この発明は前述した実施形態に限られるものではない。
例えば、前述した第1実施形態では、ステータホルダ3の第2フランジ部は、周壁部4の縁部の全周に亘って設けたが、周壁部4の縁部に沿って断続的に設けてもよい。また、第2フランジ部31や凸条33は、プレス成形によって一体に設ける構成としたが、別に環状の部材を用意し、この部材を溶接等の方法で周壁部4に接合する構成としてもよい。
2 ハウジング
3 ステータホルダ
4 周壁部
4b 外周面
7 補強部
12 フランジ部
16 ステータ片
20 ステータコイル(コイル)
31 第2フランジ部(他のフランジ部)
32 凸部
33 凸条
Claims (5)
- コイルが巻回された複数のステータ片と;
周壁部において前記複数のステータ片を環状に配列して支持するステータホルダと;
前記ステータホルダの外側に配置されてこのステータホルダを支持するハウジングと;
を備え、
前記ステータホルダが、
その軸線方向一端側の縁からその径方向外側に連続的に張り出してかつ、前記ハウジングに対して固定されるフランジ部と、
前記周壁部の外周面に、このステータホルダの前記径方向の振動を規制する補強部と、
を備えることを特徴とするステータ。 - 前記補強部が、前記ステータホルダの前記周壁部の軸線方向他端側の縁から径方向外側に連続的に張り出した他のフランジ部であることを特徴とする請求項1に記載のステータ。
- 前記補強部が、前記周壁部の前記外周面と前記フランジ部とのコーナー部分に渡って設けられた複数の凸部であり、これら凸部が周方向に沿って互いに所定間隔を隔てて配設されていることを特徴とする請求項1に記載のステータ。
- 前記凸部が、前記フランジ部から徐々に突出高さが減少して前記周壁部に至る形状を備えることを特徴とする請求項3に記載のステータ。
- 前記補強部が、前記周壁部の前記外周面に連続的に張り出した凸条であることを特徴とする請求項1に記載のステータ。
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JP2014090533A (ja) * | 2012-10-29 | 2014-05-15 | Honda Motor Co Ltd | 回転電機のステータ |
JP2015089173A (ja) * | 2013-10-29 | 2015-05-07 | 三菱電機株式会社 | 回転電機 |
JP2018170834A (ja) * | 2017-03-29 | 2018-11-01 | 本田技研工業株式会社 | 車両及び車両の制御方法 |
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JP2020043734A (ja) * | 2018-09-13 | 2020-03-19 | 本田技研工業株式会社 | 回転電機用ステータコアおよび回転電機 |
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US9379589B2 (en) | 2016-06-28 |
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