WO2008035754A1 - Moteur sans balai - Google Patents

Moteur sans balai Download PDF

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Publication number
WO2008035754A1
WO2008035754A1 PCT/JP2007/068337 JP2007068337W WO2008035754A1 WO 2008035754 A1 WO2008035754 A1 WO 2008035754A1 JP 2007068337 W JP2007068337 W JP 2007068337W WO 2008035754 A1 WO2008035754 A1 WO 2008035754A1
Authority
WO
WIPO (PCT)
Prior art keywords
resolver
holder
stator
bracket
rotor
Prior art date
Application number
PCT/JP2007/068337
Other languages
English (en)
Japanese (ja)
Inventor
Satoshi Shinfuku
Masayuki Okubo
Original Assignee
Mitsuba Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsuba Corporation filed Critical Mitsuba Corporation
Priority to JP2008535392A priority Critical patent/JP5064401B2/ja
Publication of WO2008035754A1 publication Critical patent/WO2008035754A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/12—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using detecting coils using the machine windings as detecting coil

Definitions

  • the present invention relates to a brushless motor, and more particularly, to a mounting structure for a rotor position detecting device in a brushless motor.
  • a stator-side coil (stator coil) is sequentially excited to rotationally drive the rotor.
  • detection devices using encoders, Hall ICs, etc. have been used to detect the rotational position of the rotor.
  • brushless motors using resolvers have also increased.
  • the resolver has a simple structure that is resistant to high temperatures and vibrations and is not easily damaged.
  • FIG. 8 is a cross-sectional view showing a configuration of a conventional brushless motor using a resolver.
  • a resorno 102 is used to detect the rotational position of the rotor 101.
  • the resolver 102 includes a resolver stator 103 and a resolver rotor 104, and an exciting coil 105 is wound around the stator.
  • a resolver rotor 104 formed of a magnetic material is disposed on the rotor side, and the resolver rotor 104 is fixed to the rotor shaft 106 of the motor 100.
  • the detection signal accuracy of the resolver is indicated by an error between the rotor rotation angle and the resolver detection signal, and the more linear the relationship between the two, the more accurate the sensor.
  • the higher the rotor position detection accuracy the more accurate energization is possible, and torque fluctuations can be suppressed and the steering feeling can be improved. Therefore, in the resolver origin adjustment, the induced voltage waveform of the motor and the detection signal of the resolver are compared, and the resolver stator mounting position is finely adjusted in the rotational direction, so that the rise of the resolver signal reaches the determined rotor rotational position. adjust.
  • it is possible to obtain a brushless motor with little torque fluctuation in which the rising force S position of the resolver signal corresponds to the rotor rotational position and the rotational left-right difference is eliminated.
  • an origin adjustment function is usually provided on a bracket attached to the end surface of the motor.
  • a bracket attached to the end surface of the motor.
  • an adjustment hole is formed in the bracket 108 at the left end of the motor in order to adjust the attachment position of the resolver holder 107 to which the resolver stator 103 is attached.
  • FIG. 9 is a left side view of the motor 100, and the bracket 108 is provided with a resolver adjustment hole 109 and a resolver mounting hole 110.
  • the resolver holder 107 is attached to the motor 108 inward force, and the bracket 108.
  • the fixed piece 107 a force of the resolver holder 107 is output from the resolver mounting hole 110 to the outside of the bracket 108.
  • the resolver holder 107 is rotated in the circumferential direction, and the fixing screw 111 is temporarily fixed.
  • the bracket assembly 112 includes a bracket 108, a resolver holder 107 to which a bearing 115 and a resolver stator 103 are attached, and the bracket 115 and the resolver holder 107 are assembled to the bracket 108.
  • a sensor wire 116 is connected to the resolver stator 103. The sensor wire 116 is drawn out in the radial direction from the outer periphery of the bracket assembly 112.
  • the rotor assembly 113 includes a motor rotor 101 and a resolver rotor 104.
  • the rotor 101 has a configuration in which a rotor core 117 is fixed to a rotor shaft 106, a magnet holder 118 is attached, a magnet 119 is press-fitted into the magnet holder 118, and a magnet cover 120 is attached to the outside of the magnet 119. ing.
  • the resolver rotor 104 is also fixed to the rotor shaft 106 and is arranged adjacent to the end of the magnet holder 118 of the rotor 101.
  • the stator assembly 114 includes a case 121, a stator core 123 fixed in the case 121 and wound with a motor coil 122, and a bus bar unit 124 attached to the end of the stator core 123.
  • the stator core 123 is press-fitted or adhesively fixed in the case 121 !.
  • the motor 100 After each assembly 112, 113, 114 is threaded, the motor 100 first assembles the rotor assembly 113 to the bracket assembly 112 (procedure A in FIG. 10). Next, the assembly of the bracket assembly 112 and the rotor assembly 113 is assembled to the stator assembly 114 (step B in FIG. 10). Thereafter, the lead wire 126 for power supply is fixed to the bus bar unit 124 by welding via the lead wire welding hole 125 provided in the bracket 108. As a result, the motor 100 configured as shown in FIG. 8 is assembled. In the motor 100, the origin adjustment described above is performed after checking the resistance value and insulation state of the motor. After completing various characteristic checks, the brushless motor is completed.
  • Patent Document 1 Japanese Patent Laid-Open No. 2005-229721
  • An object of the present invention is to prevent misalignment between a resolver stator and a resolver rotor in a brushless motor, and to improve rotor position detection accuracy.
  • a brushless motor of the present invention includes a stator including a core around which a drive coil is wound and a case that accommodates the core, a bracket that is attached to one end of the case, and the case and the bracket that are freely rotatable.
  • a rotor having a shaft supported by the shaft and a magnet attached to the shaft and rotatably disposed inside the stator, a resolver rotor attached to the shaft and rotating together with the magnet, and an outer side of the resolver rotor
  • a resolver stator having a detection coil that changes a phase of an output signal as the resolver rotor rotates, wherein the resolver stator is a cylindrical resolver.
  • the resolver holder is housed in the holder, and the resolver holder is mounted on the bracket. It is mounted on a holder mounting part formed concentrically with the shaft.
  • the resolver stator is accommodated in the cylindrical resolver holder, and a holder mounting portion is formed concentrically with the shaft on the bracket, and the resolver holder is mounted on the holder mounting portion.
  • the resolver stator can be attached to the rotor shaft with high accuracy, and misalignment between the resolver stator and the resolver rotor can be suppressed. For this reason, the linearity between the rotor rotation angle and the detection signal of the resolver is increased, and the rotor position detection accuracy is improved.
  • the resolver holder is provided with a holder portion in which the resolver stator is accommodated concentrically, and the holder portion is fitted to the outer periphery of the holder mounting portion, that is, the holder portion is attached to the holder. It may be attached by fitting to the outer periphery of the attachment portion. Further, the holder part may be fitted to the outer periphery of the holder attaching part in a light press-fit state. Furthermore, the holder mounting portion may be formed so as to protrude along the axial direction at the central portion of the bracket.
  • the resolver holder may be formed of a material having a thermal expansion coefficient approximate to that of the resolver stator, so that the thermal expansion of the resolver stator or the resolver holder may occur between the two. There is no gap, and play due to thermal deformation between the resolver holder and the resolver stator is suppressed, and it is possible to prevent a decrease in the accuracy of the resolver signal.
  • the resolver stator is accommodated in the cylindrical resolver holder by the brushless motor having the resolver rotor and the resolver stator, and the resolver holder is attached to the bracket.
  • the resolver stator can be attached to the rotor shaft with good core accuracy because it is mounted on the holder mounting portion formed concentrically with the shaft. Accordingly, the misalignment between the resolver stator and the resolver rotor can be suppressed, the linearity between the rotor rotation angle and the detection signal of the resolver is increased, and the rotor position detection accuracy can be improved. For this reason, for example, when the brushless motor is used for EPS, the torque fluctuation of the motor is suppressed, and the steering feeling can be improved.
  • FIG. 1 is a cross-sectional view of a brushless motor that is Embodiment 1 of the present invention.
  • FIG. 2 is an exploded perspective view of the brushless motor of FIG.
  • FIG. 3 is a perspective view showing a configuration of a bracket holder unit.
  • FIG. 4 is an explanatory diagram showing a configuration of a resolver holder.
  • FIG. 5 is an explanatory view showing an angle error between a rotor rotation angle and a resolver detection signal, and shows a comparison between a conventional brushless motor and a motor according to the present invention.
  • FIG. 6 is an explanatory view showing the structure of the bracket.
  • FIG. 7 is a cross-sectional view showing a configuration of a brushless motor that is Embodiment 2 of the present invention.
  • FIG. 8 is a c [9] a left side view of the brushless motor of FIG. 8 is a sectional view showing a conventional brushless motor configuration using resolver.
  • FIG. 10 is an explanatory view showing an assembly configuration of the brushless motor of FIG.
  • FIG. 1 is a cross-sectional view of a brushless motor that is Embodiment 1 of the present invention
  • FIG. 2 is an exploded perspective view of the brushless motor of FIG.
  • a brushless motor 1 (hereinafter abbreviated as “motor 1”) is an inner rotor type brushless motor having a stator 2 on the outside and a rotor 3 on the inside.
  • the motor 1 is, for example, a column assist type electric power steerer. It is used as a power source for the driving device (EPS), and provides operational assistance to the steering shaft of the car.
  • the motor 1 is attached to a reduction mechanism (not shown) provided on the steering shaft, and the rotation of the motor 1 is transmitted to the steering shaft by being reduced by the reduction mechanism.
  • EPS driving device
  • the stator 2 includes a bottomed cylindrical case 4, a stator core 5, a stator coil 6 wound around the stator core 5 (hereinafter abbreviated as coil 6), and a bus bar unit attached to the stator core 5. (Terminal unit) 7
  • the case 4 is formed in a bottomed cylindrical shape with iron or the like, and a bracket 24 made of aluminum die cast is attached to the opening by a fixing screw 23.
  • the stator core 5 is composed of a plurality of divided cores 8 and nine divided cores 8 are assembled in the circumferential direction.
  • the split core 8 is formed by stacking core pieces made of electromagnetic steel plates, and an insulator 9 made of synthetic resin is attached around the core.
  • a coil 6 is wound around the outside of the insulator 9. The end portion 6 a of the coil 6 is drawn out in the radial direction at one end side of the stator core 5.
  • a bus bar unit 7 is attached to one end side of the stator core 5.
  • a copper bus bar is insert-molded in a synthetic resin main body.
  • a plurality of power supply terminals 11 protrude in the radial direction.
  • the coil end 6 a is welded to the power supply terminal 11.
  • the number of bus bars corresponding to the number of phases of the motor 1 here, three for the U phase, V phase, and W phase
  • Each coil 6 is electrically connected to a power supply terminal 11 corresponding to the phase.
  • a rotor 3 is inserted inside the stator 2.
  • the rotor 3 has a rotor shaft 21.
  • the rotor shaft 21 is rotatably supported by bearings 22a and 22b.
  • the bearing 22a is fixed to the center of the bottom of the case 4, and the bearing 22b is fixed to the center of the bracket 24.
  • a cylindrical rotor core 25 is fixed to the rotor shaft 21.
  • a segment type magnet (permanent magnet) 26 is attached to the outer periphery of the rotor core 25.
  • a magnet holder 27 made of synthetic resin is attached to the rotor shaft 21. It has been deceived.
  • the magnet 26 is disposed on the outer periphery of the rotor core 25 so as to be held by the magnet holder 27.
  • six magnets 26 are arranged along the circumferential direction.
  • a magnet cover 28 having a bottomed cylindrical shape is attached to the outside of the magnet 26.
  • FIG. 3 is a perspective view showing the configuration of the bracket holder unit 35. As shown in FIG. 3, at the center of the bracket holder unit 35, a holder accommodating portion 35a into which the resolver holder 34 is inserted is provided. A plurality of ribs 35b project from the inner wall of the holder accommodating portion 35a.
  • ribs 35b are equally provided in the circumferential direction, and project slightly less than lmm inward in the radial direction.
  • the resolver holder 34 is attached in the holder accommodating portion 35a so as to be lightly press-fitted inside the rib 35b, and is temporarily held in the bracket holder unit 35.
  • a sensor harness 36 is fixed to the resolver stator 33.
  • a signal output as the rotor 32 rotates is transmitted to a controller or the like (not shown) via the sensor harness 36.
  • the sensor harness 36 is welded to the terminal portion 33a of the stator 33.
  • a synthetic resin insulator 37 is attached to the terminal portion 33a.
  • the sensor harness 36 is routed between the bracket 24 and the bracket holder unit 35 along the circumferential direction. Then, it is pulled out from the outer periphery of the bracket 24 through the rubber grommet 38 to the outside of the apparatus.
  • the resolver holder 34 is formed in a bottomed cylindrical shape, and is fitted into the central portion of the bracket holder unit 35.
  • FIG. 4 is an explanatory diagram showing the configuration of the resolver holder 34.
  • the resolver holder 34 includes a cylindrical holder part 61, a flange part 62 formed on one end side of the holder part 61, and a through hole formed in the center on the other end side of the holder part 61.
  • the bottom wall 63 is formed.
  • the resolver stator 33 is accommodated concentrically.
  • the terminal portion 33a of the stator 33 is disposed in the cutout portion 61a formed in the holder portion 61.
  • resolver stator 33 and resolver The holders 34 are formed of materials (preferably! /, Equal! /,) That are close to each other in thermal expansion coefficient (preferably within a difference of 10%, particularly preferably within 5%). Therefore, no gap is generated between the resolver holder 34 and the resolver stator 33 even if each member expands due to heat. For this reason, rattling due to thermal deformation between the resolver holder 34 and the resolver stator 33 is suppressed, and a decrease in the accuracy of the resolver signal is suppressed.
  • the flange portion 62 protrudes in the radial direction on one end side of the holder portion 61.
  • the flange portion 62 is further provided with protruding pieces 64a to 64c extending in the radial direction.
  • the projecting pieces 64a and 64b are formed at positions facing 1 80 °.
  • a long hole 65 is formed in each projecting piece 64a, 64b.
  • the long hole 65 is formed long in the circumferential direction and is used for fixing the resolver holder 34 and adjusting the origin of the resonance lever 31.
  • a round hole 66 is formed in the projecting piece 64c, and the round hole 66 is exclusively used for adjusting the origin. At the time of origin adjustment, an adjustment jig is inserted into the round hole 66 from the outside of the bracket 24, and the position of the resolver holder 34 is appropriately adjusted in the circumferential direction.
  • the open end portion (flange portion 62 side) of the resolver holder 34 is fitted to the outer periphery of the end portion of a holder mounting rib (holder mounting portion) 39 provided on the bracket 24.
  • the holder mounting rib 39 protrudes from the central portion of the bracket 24 in a partially cylindrical shape (cylindrical shape having a notch in a part) in the axial direction.
  • the outer diameter of the holder mounting rib 39 is slightly smaller than the inner diameter of the open end of the resolver holder 34. Therefore, the resolver holder 34 is mounted so as to be lightly press-fitted into the holder mounting rib 39.
  • a bearing fixing portion 40 is provided inside the holder mounting rib 39.
  • a bearing 22 b that supports the rotor shaft 21 is fixed to the bearing fixing portion 40.
  • the holder mounting rib 39 is formed concentrically with the bearing fixing portion 40. Therefore, when the resolver holder 34 is lightly press-fitted into the holder mounting rib 39, the resolver holder 34 is attached concentrically with the bearing fixing portion 40.
  • the resolver stator 33 in the holder 61 is attached to the bracket 24 concentrically with the bearing 22b, that is, concentrically with the rotor shaft 21, and the resolver stator 33 is attached to the rotor shaft 21 with high core accuracy. Installed in 1.
  • FIG. 5 is an explanatory diagram showing an angle error between the rotor rotation angle and the resolver detection signal, and shows a comparison between a conventional brushless motor (FIG. 8) and a motor according to the present invention.
  • the conventional motor shown by the alternate long and short dash line has an angular error width of about 5 °
  • the motor 1 according to the invention shown by the solid line 1 In the angular error width could be kept within about 1.5 °.
  • the motor 1 can detect the rotational position of the rotor 3 with three times higher accuracy than a conventional brushless motor. For this reason, the motor 1 can be driven with reduced torque fluctuation, and the steering feeling in EPS can be improved.
  • the bracket holder unit 35 is formed of a synthetic resin.
  • a metal resolver holder fixing nut 41 is insert-molded.
  • Two resolver holder fixing nuts 41 are provided corresponding to the long holes 65 of the resolver holder 34.
  • the bracket 24 is formed with a resolver fixing hole 48b for fixing the resolver and a resolver adjusting hole 48c for adjusting the origin of the resolver 31, as shown in FIG.
  • the resolver fixing hole 48b is disposed so as to face the long hole 65 and the resolver holder fixing nut 41, and is formed in a round hole through which the mounting screw 42 can pass.
  • the resolver adjusting hole 48c is arranged facing the round hole 66.
  • the resolver adjusting hole 48c is formed as a long hole extending in the circumferential direction so that the position of the resolver holder 34 can be adjusted in the circumferential direction.
  • An adjustment jig is inserted into the round hole 66 through the resolver adjustment hole 48c, and the position of the resolver holder 34 is adjusted (origin adjustment).
  • the resolver holder fixing nut 41 is connected to the outside of the motor 1 through the resolver fixing hole 48b.
  • Mounting screw 42 is screwed in from the part.
  • the resolver holder 34 is fixed while being sandwiched between the bracket 24 and the bracket holder unit 35.
  • a resolver adjustment hole 109 and a resolver mounting hole 110 extending in the circumferential direction are provided in the bracket 108.
  • the rigidity of the bracket 108 particularly the rigidity around the bearing 115 fixed at the center of the bracket, is lowered, and there is a possibility that the strength is insufficient.
  • vibration is applied to the resolver stator 103, which may reduce the sensing accuracy.
  • the bracket holder unit 35 is provided inside the bracket 24, and the resolver holder 34 is attached to the bracket holder unit 35, so that the resolver fixing hole needs to be a long hole. There is no.
  • the hole related to the resolver 31 is a mounting screw.
  • the through hole of the bracket 24 can be made smaller than the conventional motor, and the rigidity of the bracket 24 is improved correspondingly, and the strength thereof is also increased. Therefore, a decrease in sensing accuracy due to vibration can be suppressed, and rotor position detection accuracy can be improved.
  • the bracket holder unit 35 is also provided with three external power feeding terminals 43.
  • the external power feeding terminal 43 is provided for each of U, V, and W phases. These external power feeding terminals 43 are provided so as to protrude in the radial direction from the side surface of the bracket 24 when the bracket holder unit 35 is assembled to the bracket 24.
  • Each external power feeding terminal 43 (43U, 43V, 43W) is electrically connected to a connection terminal 44 (44U, 44V, 44W) provided in the bracket holder unit 35.
  • Each connection terminal 44 protrudes from the main body 45 of the bracket holder unit 35 in the axial direction, and is welded to the bus bar terminal 46 (46U, 46V, 46W) provided in the bus bar unit 7.
  • the bus bar terminal 46 also projects from the main body 47 of the bus bar unit 7 in the axial direction. Therefore, when the motor 1 is assembled, the bus bar terminal 46 and the connection terminal 44 face each other in parallel.
  • the bus bar terminal 46 and the connection terminal 44 are fixed by welding. As shown in Figure 6, the bracket 24 is welded for that purpose.
  • a working hole 48a is formed.
  • a bracket cap 49 is attached to the welding work hole 48a after the welding process.
  • Such a motor 1 is assembled as follows. First, the bracket assembly 51, the stator assembly 53, and the rotor assembly 54 are assembled individually.
  • the bracket assembly 51 is an assembly product in which the bracket 24 in which the bearing 22b is incorporated and the bracket holder unit 35 in which components related to the resolver stator 33 are assembled are integrated and fixed with the tapping pin screw 52.
  • a resolver holder 34 is temporarily held in the bracket holder unit 35 so as to be lightly press-fitted inside the rib 35b.
  • the resolver holder 34 itself is not fixed to the bracket 24 at this point (before the origin adjustment), and the position can be shifted in the circumferential direction during the origin adjustment.
  • the stator assembly 53 is an assembly product in which the bus bar unit 7 is attached to the stator core 5 around which the coil 6 is wound, and the power supply terminal 11 and the coil end portion 6a are welded and accommodated in the case 4.
  • Configure 2 The rotor assembly 54 is an assembly in which the rotor core 25 is fixed to the rotor shaft 21 and the magnet holder 27 is attached. Then, the magnet 26 is press-fitted and the magnet cover 28 is attached, and the resolver rotor 32 is press-fitted and fixed to the magnet holder 27.
  • the rotor 3 is configured.
  • the rotor assembly 54 is attached to the bracket assembly 51, the stator assembly 53 is externally mounted on the assembly, and the case 4 and the bracket 24 are fastened to the fixing screw 23.
  • the bus bar terminal 46 and the connection terminal 44 are fixed by welding through the welding work hole 48a. In this state, check the motor resistance and insulation state, and then adjust the origin of resolver 31.
  • the resolver adjustment hole 48c is formed in the bracket 24, and the origin adjustment is performed from the resolver adjustment hole 48c.
  • an adjusting jig (not shown) is inserted into the resolver adjusting hole 48c, the position of the resonator lever holder 34 is finely adjusted in the circumferential direction using the long hole 65, and the origin of the resolver 31 is adjusted.
  • the sensor wire 116 is drawn from the bracket assembly 112 and the lead wire 126 is drawn separately from the stator assembly 114, so that the sensor wire 116 and the lead wire 126 are obstructive. As a result, the assembly work may be difficult to perform.
  • the bracket holder unit 35 is integrated with the sensor harness 36 and the power supply lead wire, each wire can be easily handled and assembled easily.
  • the sensor harness 36 and the lead wire for power feeding are fixed by being sandwiched between the stator assembly 53 and the bracket assembly 51. It has been made easier.
  • the brushless motor 55 of the second embodiment (hereinafter abbreviated as the motor 55) has a configuration in which the position of the resolver 31 is arranged outside the motor, and the other configuration is almost the same as the motor 1 of the first embodiment. .
  • the same members and parts as those in Example 1 are denoted by the same reference numerals, and the description thereof is omitted.
  • FIG. 7 is a cross-sectional view showing the configuration of the motor 55.
  • both ends of the case 56 are open, and aluminum die-cast brackets 57a and 57b are attached to the both sides.
  • a bearing fixing portion 58 to which the bearing 22a is fixed is provided in a cylindrical shape.
  • a cylindrical holder mounting portion 59 is projected.
  • the holder mounting portion 59 is formed concentrically with the bearing fixing portion 58.
  • a resolver holder 34 to which a resolver stator 33 is fixed is attached to the holder attaching portion 59.
  • the outer diameter of the holder mounting portion 59 is slightly smaller than the inner diameter of the open end of the resolver holder 34. Therefore, the resolver holder 34 is mounted so as to be press-fitted into the holder mounting portion 59.
  • the holder mounting portion 59 is provided concentrically with the bearing fixing portion 58. Accordingly, the resolver holder 34 is mounted concentrically with the rotor shaft 21 by lightly press-fitting the resolver holder 34 into the holder mounting portion 59.
  • a seal fitting structure is employed, so that the resolver stator 33 is concentrically attached to the rotor shaft 21 with high core accuracy. For this reason, it is possible to suppress the misalignment between the stator 33 and the rotor 32 in the resolver 31, and the linearity between the rotor rotation angle and the detection signal of the resolver 31 is increased, thereby improving the rotor position detection accuracy. It is done.
  • a cylindrical boss shape may be used in the same manner as the holder mounting portion 59 of the 1S embodiment 2 in which the holder mounting rib 39 has a partially cylindrical shape.
  • the end portion of the holder portion 61 is configured to be fitted to the holder mounting rib 39, but the portion to be fitted to the holder mounting rib 39 is not limited to the holder portion 61.
  • a portion having a diameter larger than that of the holder portion 61 may be formed at the end portion of the holder portion 61, and this may be fitted to the holder mounting rib 39. That is, if the resolver holder 34 is mounted on the holder mounting rib 39 so that the resolver stator 33 is arranged concentrically with the rotor shaft 21, any part is mounted on the holder mounting rib 39. Also good.
  • the present invention can be applied to a force S indicating a brushless motor used for column-assisted EPS and other types of EPS motors.
  • the present invention can be widely applied to general brushless motors as well as motors for EPS and various in-vehicle electric products.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Steering Mechanism (AREA)
  • Brushless Motors (AREA)

Abstract

L'invention concerne un stator de transformateur (33) qui est contenu dans un support de transformateur (34). Le support de transformateur (34) comprend une partie de support cylindrique (61). Le stator de transformateur (33) est contenu coaxialement dans la partie de support (61). Une nervure de montage du support (39), formée coaxialement avec une partie de fixation de palier (40), se projette à partir d'une oreille (24). Un palier (22b) pour porter un arbre de rotor (21) est fixé à la partie de fixation de palier (40). La partie de support (61) du support de transformateur (34) est montée à ajustement légèrement serré à la périphérie externe des nervures de montage (39) du support. Ainsi, le stator de transformateur (33) peut être installé sur un arbre de rotor (21) avec une précision de centrage élevée.
PCT/JP2007/068337 2006-09-22 2007-09-21 Moteur sans balai WO2008035754A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008535392A JP5064401B2 (ja) 2006-09-22 2007-09-21 ブラシレスモータ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006258113 2006-09-22
JP2006-258113 2006-09-22

Publications (1)

Publication Number Publication Date
WO2008035754A1 true WO2008035754A1 (fr) 2008-03-27

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PCT/JP2007/068337 WO2008035754A1 (fr) 2006-09-22 2007-09-21 Moteur sans balai

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WO (1) WO2008035754A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010041870A (ja) * 2008-08-07 2010-02-18 Mitsuba Corp ブラシレスモータ
JP2013106409A (ja) * 2011-11-11 2013-05-30 Mitsuba Corp ブラシレスモータ
CN109923772A (zh) * 2016-06-27 2019-06-21 Abb瑞士股份有限公司 电机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6331458A (ja) * 1986-07-25 1988-02-10 Toshiba Corp 電動機の回転数検出装置
JPS6416164U (fr) * 1987-07-20 1989-01-26
JPH01238444A (ja) * 1987-11-02 1989-09-22 Seagate Technol カプセル封入形ステップモータ
JP2000136942A (ja) * 1998-10-30 2000-05-16 Sanyo Denki Co Ltd 電磁誘導式回転センサ
JP2001078393A (ja) * 1999-09-08 2001-03-23 Aisin Seiki Co Ltd レゾルバを備えた回転機械

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6331458A (ja) * 1986-07-25 1988-02-10 Toshiba Corp 電動機の回転数検出装置
JPS6416164U (fr) * 1987-07-20 1989-01-26
JPH01238444A (ja) * 1987-11-02 1989-09-22 Seagate Technol カプセル封入形ステップモータ
JP2000136942A (ja) * 1998-10-30 2000-05-16 Sanyo Denki Co Ltd 電磁誘導式回転センサ
JP2001078393A (ja) * 1999-09-08 2001-03-23 Aisin Seiki Co Ltd レゾルバを備えた回転機械

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010041870A (ja) * 2008-08-07 2010-02-18 Mitsuba Corp ブラシレスモータ
JP2013106409A (ja) * 2011-11-11 2013-05-30 Mitsuba Corp ブラシレスモータ
CN109923772A (zh) * 2016-06-27 2019-06-21 Abb瑞士股份有限公司 电机

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JP5064401B2 (ja) 2012-10-31
JPWO2008035754A1 (ja) 2010-01-28

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