WO2013084270A1 - Moteur électrique - Google Patents

Moteur électrique Download PDF

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Publication number
WO2013084270A1
WO2013084270A1 PCT/JP2011/006893 JP2011006893W WO2013084270A1 WO 2013084270 A1 WO2013084270 A1 WO 2013084270A1 JP 2011006893 W JP2011006893 W JP 2011006893W WO 2013084270 A1 WO2013084270 A1 WO 2013084270A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric motor
target
shaft
magnetic field
stator
Prior art date
Application number
PCT/JP2011/006893
Other languages
English (en)
Japanese (ja)
Inventor
秀哲 有田
後藤　隆
弘文 土井
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2013547969A priority Critical patent/JP5840226B2/ja
Priority to PCT/JP2011/006893 priority patent/WO2013084270A1/fr
Publication of WO2013084270A1 publication Critical patent/WO2013084270A1/fr

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    • 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
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
    • H02K11/014—Shields associated with stationary parts, e.g. stator cores
    • H02K11/0141—Shields associated with casings, enclosures or brackets
    • 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

Definitions

  • This invention relates to an electric motor having a shield for protecting a magnetic sensor from a magnetic field generated by the electric motor body.
  • Patent Documents 1 and 2 Conventional motors with electromagnetic brakes (see, for example, Patent Documents 1 and 2) detect the magnetic pole of a target magnet fixed to a shaft by a magnetic sensor arranged around the shaft in order to control the rotational speed. .
  • this magnetic sensor has a concern that a sensing failure may occur due to magnetic flux leakage from the electromagnetic brake. Therefore, a magnetic shield member is installed between the electromagnetic brake and the magnetic sensor to reduce the influence of leakage magnetic flux from the electromagnetic brake on the magnetic sensor.
  • this type of magnetic sensor detects a change in the magnetic field of the bias magnet in accordance with the displacement of the target magnetic material, the signal change is weak compared to the case where the magnetic pole of the target magnet is detected. It is easily affected by disturbances such as generated magnetic flux. Therefore, there is a problem that the shielding performance is insufficient in the magnetic shield member configured to shield only the leakage magnetic flux from the electromagnetic brake as in Patent Documents 1 and 2, and this type of magnetic sensor and electric motor are specialized. A shield structure is required.
  • the present invention has been made to solve the above-described problems, and it is an object of the present invention to suppress a sensing failure of a magnetic sensor in a high-speed rotating motor in which a target magnet cannot be installed on the shaft side.
  • the electric motor according to the present invention is based on the influence of the target on the main body of the motor, the target of the magnetic material that rotates integrally with the shaft of the main body of the motor, and the internal magnetic field generated from the built-in bias magnet installed at a position facing the target.
  • a magnetic sensor that detects rotation of the shaft based on the change, and a shield member that shields an external magnetic field generated by the electric motor body from the magnetic sensor.
  • a magnetic material target and a magnetic sensor with a built-in bias magnet are installed for a high-speed rotating motor in which a target magnet cannot be installed on the shaft side, and further shielded from an external magnetic field generated by the motor body.
  • FIG. 1 is an exploded perspective view showing a configuration of an electric motor according to Embodiment 1.
  • FIG. 3 (a) is the top view seen from the bus-bar part
  • FIG.3 (b) is sectional drawing cut
  • FIG. 5 shows an external magnetic field of the electric motor according to Embodiment 1
  • FIG. 5A shows an external magnetic field of the stator portion
  • FIG. 5B shows an external magnetic field of the bus bar portion
  • FIG. 5C shows an external magnetic field of the coil.
  • FIG. 5 shows an external magnetic field of the electric motor according to Embodiment 1
  • FIG. 5A shows an external magnetic field of the stator portion
  • FIG. 5B shows an external magnetic field of the bus bar portion
  • FIG. 5C shows an external magnetic field of the coil.
  • FIG. 5 is a diagram for explaining an example of a method for fixing a shield member in the first embodiment.
  • FIG. 10 is a diagram for explaining another example of a method for fixing a shield member in the first embodiment.
  • the structure of the magnetic target of the electric motor which concerns on Embodiment 1 is shown, Fig.8 (a) is sectional drawing, FIG.8 (b) is a top view. It is sectional drawing which shows the structure of the electric motor which concerns on Embodiment 2 of this invention.
  • FIG. 10 is a cross-sectional view showing a modified example of the shield member in the second embodiment.
  • FIG. 1 An electric motor 1 shown in FIGS. 1 and 2 constitutes a three-phase AC synchronous motor that rotates at high speed, and mainly includes a cylindrical housing 2, a stator portion 3 fixed inside the housing 2, and a shaft 4. A rotor unit 5 to be rotated and a bus bar unit (power distribution unit) 6 disposed on one end face side of the stator unit 3 are provided.
  • the rotor portion 5 is formed with two protrusions protruding outward in the circumferential direction at intervals of 180 degrees, and the protrusions are shifted 90 degrees in the middle of the shaft 4 in the axial direction (protrusions 5a and 5b).
  • the rotor portion 5 may be composed of a permanent magnet, but when the motor 1 is exposed to a high temperature, the magnetic properties deteriorate. Therefore, for example, the electromagnetic steel plate is punched out and laminated in the axial direction of the shaft 4. Is preferred. Also when the rotor part 5 is comprised with a laminated steel plate, it is set as the state which shifted the protrusion 90 degree
  • the shaft 4 is rotatably supported by bearings 7 and 8 fixed to the housing 2.
  • the rotor part 5 is fixed to the shaft 4, and the rotational force generated in the rotor part 5 is externally output by rotating the shaft 4 integrally with the rotor part 5.
  • the shaft 4 is connected to a rotating shaft of a turbine (so-called impeller), and the electric motor 1 rotationally drives the turbine.
  • FIG. 3A shows a plan view of the stator portion 3 viewed from the bus bar portion 6 side
  • FIG. 3B shows a cross-sectional view taken along the line AA.
  • the stator portion 3 includes two stator cores 9 and 10 and a magnet 11 disposed between the stator cores 9 and 10.
  • Each of the stator cores 9 and 10 is configured by laminating electromagnetic steel plates in the axial direction of the shaft 4.
  • Each of the stator cores 9 and 10 includes an annular body 9a and 10a and six protrusions (hereinafter referred to as teeth 9b and 10b) protruding from the inner peripheral portions of the annular bodies 9a and 10a toward the center.
  • a U-shaped coil 12 is attached to each of the teeth 9b and 10b.
  • the magnet 11 has substantially the same shape as the annular bodies 9a and 10a.
  • each coil 12 mounted on each tooth 9b, 10b penetrates the bus bar portion 6 and protrudes toward the inverter board 13 side, and the copper plate coil 14 (U-phase) of the bus bar portion 6 is projected. , V phase, W phase).
  • the copper plate coil 14 is a conductive member molded on the bus bar portion 6.
  • the copper plate coil 14 is annularly arranged along the circumferential direction of the shaft 4 and has an end connected to the inverter board 13.
  • the inverter board 13 converts an external power source (not shown) input from the connector unit 15 into an alternating current, and based on the position signal input from the magnetic sensor 16, the U-phase, V-phase, and W-phase of the copper plate coil 14. A current is passed through the copper plate coil 14 by sequentially switching the three phases.
  • the inverter board 13 is attached to the inside of the cover housing 20 and covered with the cover 21.
  • the shaft 4 protrudes from one end surface of the stator portion 3 to the inner peripheral space of the bus bar portion 6, and a magnetic target 17 is fixed to the protruding tip by a screw 18.
  • the magnetic target 17 is a magnetic material such as iron.
  • the other magnetic sensor 16 is installed at a position facing the magnetic target 17 in the inner circumferential space of the bus bar portion 6 and incorporates a bias magnet (not shown). The magnetic field generated by the biasing magnet changes in accordance with the displacement of the magnetic target 17 accompanying the rotation of the shaft 4, and the magnetic sensor 16 detects the change in the magnetic field and generates a position signal indicating the rotational position of the shaft 4. Output.
  • the magnetic flux generated by the magnet 11 magnetized in the axial direction flows out from the teeth 10b of the stator core 10 disposed on the N-pole side of the magnet 11 to the protrusion 5b of the rotor portion 5, and advances through the rotor portion 5 in the axial direction. It becomes a field magnetic flux that flows out from the protrusion 5a on the pole side and flows into the teeth 9b of the stator core 9 arranged on the S pole side of the rotor part 5.
  • FIG. 4 is a plan view of the stator portion 3 and the rotor portion 5 as viewed from the bus bar portion 6 side. However, the housing 2 and the coil 12 are not shown.
  • a cylindrical shield member 19 is arranged in the inner circumferential space of the bus bar portion 6 where the magnetic sensor 16 and the magnetic target 17 are installed to block the external magnetic field.
  • FIG. 5 shows the magnetic fields of the stator unit 3, the bus bar unit 6, and the coil 12 that are external magnetic field generation sources.
  • FIG. 5A shows an axial magnetic field generated by the stator portion 3, a broken line is a magnetic field without the shield member 19, and a solid line is a magnetic field with the shield member 19.
  • the shield member 19 When the shield member 19 is not provided, the leakage magnetic flux of the external magnetic field generated by the magnet 11 of the stator portion 3 flows to the inner circumferential space of the bus bar portion 6 and the shaft 4 via the coil 12 and the like. Affects magnetic field.
  • the shield member 19 when the shield member 19 is installed, the leakage magnetic flux is concentrated on the shield member 19 and becomes a path of the leakage magnetic flux, so that the leakage magnetic flux flowing into the inner circumferential space of the bus bar portion 6 can be reduced.
  • FIG. 5B shows the axial magnetic field generated by the bus bar portion 6, the broken line is the magnetic field without the shield member 19, and the solid line is the magnetic field with the shield member 19.
  • the shield member 19 is not provided, an external magnetic field in the axial direction generated in the copper plate coil 14 molded in the circumferential direction on the bus bar portion 6 flows in the inner circumferential space of the bus bar portion 6, so that the internal magnetic field of the magnetic sensor 16 is affected. Effect.
  • the shield member 19 when the shield member 19 is installed, since the magnetic flux is concentrated on the shield member 19 and the magnetic flux from the copper plate coil 14 passes, the magnetic flux flowing into the inner peripheral space of the bus bar portion 6 can be reduced.
  • FIG. 5C shows the circumferential magnetic field generated by the coil 12, the broken line is the magnetic field without the shield member 19, and the solid line is the magnetic field with the shield member 19 present.
  • the shield member 19 When the shield member 19 is not provided, an external magnetic field in the circumferential direction generated in the coil 12 extending along the axial direction flows into the inner circumferential space of the bus bar portion 6, thereby affecting the internal magnetic field of the magnetic sensor 16.
  • the shield member 19 when the shield member 19 is installed, since the magnetic flux is concentrated on the shield member 19 and the magnetic flux from the coil 12 passes, the magnetic flux flowing into the inner circumferential space of the bus bar portion 6 can be reduced.
  • the shield member 19 on the inner peripheral surface of the bus bar part 6, the external magnetic field from the stator part 3, the bus bar part 6 and the coil 12 can be blocked, and the influence of the external magnetic field on the magnetic sensor 16 can be reduced. Can be reduced.
  • the magnetic sensor 16 is adjacent to the teeth 9b and 10b adjacent to each other when viewed from the axial direction in the inner circumferential space of the bus bar portion 6 so as not to be affected by the leakage magnetic flux from the stator cores 9 and 10 and the magnetic field of the coil 12. It is preferable to arrange
  • the coil 12 When the coil 12 is energized from the bus bar portion 6, a current flows in a direction indicated by a broken line in FIG. 3B, and a magnetic flux flows in a direction indicated by a solid line in FIG. At this time, the magnetic flux density of each tooth 9b, 10b is high, and the magnetic flux density is low in the gap between each tooth 9b, 10b.
  • the magnetic sensor 16 when the magnetic sensor 16 is installed inside the bus bar portion 6, the external magnetic field is magnetized by arranging the magnetic sensor 16 between the teeth 9 b and 10 b having a relatively low magnetic flux density when viewed from the axial direction. The influence on the sensor 16 can be further reduced.
  • the number of teeth 9b and 10b and the number of magnetic sensors 16 installed are not limited to the illustrated example, and may be arbitrary.
  • the shield member 19 is preferably fixed to the bus bar portion 6 by the following method (1) or (2) in consideration of productivity and simple assembly.
  • FIG. 6 is a view for explaining a method of fixing the bus bar portion 6 and the shield member 19 by integral molding
  • FIG. 6 (a) is a sectional view of the electric motor 1
  • FIG. 6 (b) is a shield member.
  • As the molding material a non-conductive resin mold material is employed in order to insulate the copper plate coil 14 and the shield member 19. And the copper plate coil 14 and the shield member 19 are installed in a metal mold
  • the molding method may be insert molding or outsert molding.
  • a resin inflow hole 19a as shown in FIG. 6B is provided in the shield member 19 in order to fix the shield member 19 to the resin.
  • the number of the resin inflow holes 19 a may be arbitrary, but the position is set so as not to face the magnetic sensor 16.
  • FIGS. 7A and 7B are diagrams for explaining a method of fixing the shield member 19 to the bus bar portion 6 by snap fit.
  • FIG. 7A is a cross-sectional view of the electric motor 1 and FIG. FIG.
  • a snap fit 19 b having elasticity is formed on the shield member 19, and the snap fit 19 b is hooked on the end of the inner peripheral surface of the bus bar portion 6.
  • the number and position of the snap fits 19b may be arbitrary.
  • FIG. 8A is an enlarged cross-sectional view of the magnetic target 17 shown in FIG. 1, and FIG. 8B is a plan view of the magnetic target 17 viewed from the bus bar portion 6 side.
  • a hollow shaft 22 made of a non-magnetic material (such as an aluminum alloy) is installed between the magnetic target 17 and the shaft 4, and a magnetic gap is formed in an axial magnetic field generated by the stator unit 3.
  • the hollow shaft 22 has a through hole 22a for inserting the shaft 4, a boss portion 22b for extrapolating the magnetic target 17, and a flange portion 22c for stopping the magnetic target 17.
  • the tip surface of the hollow shaft 22 A clearance 23 is formed between the screw heads.
  • the hollow shaft 22 and the magnetic target 17 are provided with uneven portions 22d and 17a for preventing rotation. Since the two convex portions 22d of the hollow shaft 22 are fitted into the two concave portions 17a of the magnetic target 17, the target portion 17b can be positioned in the circumferential direction, and the positional displacement in the circumferential direction during the operation of the electric motor 1 can be reduced. Can be prevented. In order to relieve stress applied to the uneven portions 22d and 17a, the uneven portions 22d and 17a are preferably provided in the same direction as the target portion 17b.
  • the magnetic target 17 and the hollow shaft 22 may be fixed by a method other than fixing with the screw 18.
  • the magnetic target 17 may be press-fitted and fixed to the boss portion 22 b of the hollow shaft 22.
  • the magnetic target 17 may be fastened with a female screw, and the boss portion 22b of the hollow shaft 22 may be a male screw.
  • the magnetic target 17 having the shape illustrated in FIG. 8B is a 4-pole sensor target in which two target portions 17b project from a line-symmetrical position with the shaft 4 as the center.
  • the magnetic sensor 16 determines that the shaft 4 has made one rotation every time the internal magnetic field detection level changes four times: high, low, high, and low.
  • the shape of the target portion 17b may be a shape other than that shown in FIG.
  • the electric motor 1 includes the electric motor main body, the magnetic target 17 that rotates integrally with the shaft 4 of the electric motor main body, and the built-in bias magnet that is installed at a position facing the magnetic target 17.
  • the magnetic sensor 16 detects the rotation of the shaft 4 based on the change of the internal magnetic field generated from the magnetic target 17 and the shield member 19 shields the external magnetic field generated by the motor body from the magnetic sensor 16. It was configured as follows. For this reason, in the high-speed motor 1 that is not suitable for use with the conventional magnetic sensor, the magnetic sensor 16 having resistance to high-speed rotation inertia can be used, and furthermore, this magnetic sensor 16 can be protected from the external magnetic field of the motor body. , Sensing failure can be suppressed. Therefore, the rotational position of the electric motor 1 that rotates at high speed can be detected with high accuracy.
  • the electric motor body is fixed to a position surrounding the outer periphery of the rotor portion 5 and the rotor portion 5 integrated with the shaft 4, and a plurality of teeth 9b and 10b protruding toward the rotor portion 5 side.
  • a bus bar portion 6 composed of a copper plate coil 14 disposed, and a coil 12 which is attached to each of the teeth 9b and 10b of the stator portion 3 and receives power supply from the bus bar portion 6 to generate a rotational force in the rotor portion 5.
  • the shield member 19 receives an axial external magnetic field generated by the stator portion 3, an axial external magnetic field generated by the bus bar portion 6, and a circumferential external magnetic field generated by the coil 12. Configured to shield any one or more of the external magnetic field. For this reason, when using the magnetic sensor 16 for a three-phase synchronous motor, an external magnetic field can be shielded and sensing failure can be suppressed.
  • the shield member 19 is integrally formed with the inner peripheral surface of the bus bar portion 6, so that the assemblability can be improved.
  • the shield member 19 is attached to the inner peripheral surface of the bus bar portion 6 by the snap fit 19b, the attachment is simple and the mass productivity is high.
  • the hollow shaft 22 made of a nonmagnetic material is provided between the magnetic target 17 and the shaft 4, the leakage magnetic flux from the shaft 4 can be reduced, and the detection accuracy can be improved. Become.
  • the hollow shaft 22 includes the through hole 22a into which the shaft 4 is inserted, the boss portion 22b to which the magnetic target 17 is externally inserted, and the flange that holds the externally inserted magnetic target 17 in contact therewith.
  • Part 22c, and the length L1 of the boss part 22b is made shorter than the plate thickness L2 of the magnetic target 17, so that it is possible to prevent displacement when the magnetic target 17 is thermally contracted, and to improve detection accuracy. It becomes possible.
  • the magnetic sensor 16 is arranged between the teeth 9b (or 10b) of the stator portion 3 in the axial view, so that the influence of the external magnetic field can be suppressed and detected. The accuracy can be improved.
  • FIG. 9 is a cross-sectional view showing the configuration of the electric motor 1 according to the second embodiment.
  • the shield member 19-1 includes a cylindrical portion 19-1a shaped to cover the inner peripheral surface of the bus bar portion 6 and a cap portion 19-1b shaped to cover one end face side of the stator portion 3.
  • a hole penetrating the shaft 4 is formed in the cap portion 19-1b. Since this cap portion 19-1b blocks the external magnetic field in the axial direction generated in the stator portion 3 and the coil 12, the magnetic sensor 16 has improved resistance to the external magnetic field in the axial direction.
  • FIG. 9 shows an example of integral molding.
  • FIG. 10 shows an example of snap fit.
  • FIG. 10 is a cross-sectional view showing a modification of electric motor 1 according to the second embodiment. As shown in FIG. 10, a plurality of snap fits 19-1c are formed in the cylindrical portion 19-1a, and these snap fits 19-1c are hooked on the end of the inner peripheral surface of the bus bar portion 6, thereby And the shield member 19-1.
  • the magnetic target 17 and the magnetic sensor 16 are disposed on the one end face side of the stator portion 3 and in the inner circumferential space of the bus bar portion 6, and the shield member 19 is disposed on the bus bar portion 6.
  • a cap portion 19-1b having a shape covering one end surface side of the stator portion 3 is provided.
  • the shield member 19-1 is made only of the cylindrical portion 19-1a (ie, the same shape as the shield member 19 of the first embodiment) or the cap portion 19- The shape may be only 1b.
  • the electric motor according to the present invention is provided with a shield member suitable for a magnetic sensor incorporating a bias magnet, it is suitable for use in an electric motor that operates at high speed.
  • 1 electric motor 2 housing, 3 stator part, 4 shaft, 5 rotor part, 5a, 5b protrusion, 6 bus bar part, 7, 8 bearing, 9, 10 stator core, 9a, 10a annular body, 9b, 10b teeth, 11 magnet , 12 coil, 13 inverter board, 14 copper plate coil, 15 connector part, 16 magnetic sensor, 17 magnetic target, 17a concave part, 17b target part, 18 screws, 19, 19-1 shield member, 19-1a cylindrical part, 19- 1b cap part, 19a resin inflow hole, 19b, 19-1c snap fit, 20 cover housing, 21 cover, 22 hollow shaft, 22a through hole, 22b boss part, 22c flange part, 22d convex part, 23 clearance.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Selon l'invention, une cible magnétique (17), et un capteur magnétique (16) dans lequel est intégré un aimant pour polarisation, sont placés dans un espace côté périphérie interne d'une partie barre omnibus (6) encerclant une bobine à plaques de cuivre (14). En outre, afin de bloquer les champs magnétiques provenant d'une partie stator (3), de la bobine (12) et de la partie barre omnibus (6), le capteur magnétique (16) est protégé par disposition d'un élément de blindage (19) de forme cylindrique recouvrant la face périphérique interne de la partie barre omnibus (6).
PCT/JP2011/006893 2011-12-09 2011-12-09 Moteur électrique WO2013084270A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2013547969A JP5840226B2 (ja) 2011-12-09 2011-12-09 電動機
PCT/JP2011/006893 WO2013084270A1 (fr) 2011-12-09 2011-12-09 Moteur électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/006893 WO2013084270A1 (fr) 2011-12-09 2011-12-09 Moteur électrique

Publications (1)

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WO2013084270A1 true WO2013084270A1 (fr) 2013-06-13

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WO (1) WO2013084270A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015040482A3 (fr) * 2013-09-17 2015-07-30 Toyota Jidosha Kabushiki Kaisha Dispositif de chauffage de couronne rotor, et procédé d'ajustage serré de couronne rotor
JP2015201920A (ja) * 2014-04-04 2015-11-12 アスモ株式会社 モータ
US20160352190A1 (en) * 2015-05-25 2016-12-01 Jtekt Corporation Rotation angle detection device
WO2017121525A1 (fr) * 2016-01-13 2017-07-20 Fraba B.V. Agencement d'un système de mesure d'angle de rotation sur un boîtier
FR3056265A1 (fr) * 2016-09-19 2018-03-23 Valeo Systemes De Controle Moteur Compresseur de suralimentation
WO2019193716A1 (fr) * 2018-04-05 2019-10-10 三菱電機株式会社 Moteur, soupape, actionneur et procédé de fabrication de moteur
WO2020053992A1 (fr) * 2018-09-12 2020-03-19 三菱電機株式会社 Codeur à plaque de blindage de champ magnétique
WO2023068125A1 (fr) * 2021-10-20 2023-04-27 株式会社不二工機 Électrovanne
JP7396023B2 (ja) 2019-12-20 2023-12-12 ニデック株式会社 モータ

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JP2010104124A (ja) * 2008-10-22 2010-05-06 Mitsubishi Electric Corp 回転電機、及びその製造方法

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JPS6254565U (fr) * 1985-09-20 1987-04-04
JP2002130285A (ja) * 2000-10-24 2002-05-09 Sankyo Seiki Mfg Co Ltd 空気動圧軸受および光偏向器
JP4703845B2 (ja) * 2000-12-26 2011-06-15 株式会社トプコン 小型回転モータ
JP4207386B2 (ja) * 2000-12-28 2009-01-14 株式会社デンソー 磁石装備電機子をもつ誘導子型電気機械

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Publication number Priority date Publication date Assignee Title
JP2010104124A (ja) * 2008-10-22 2010-05-06 Mitsubishi Electric Corp 回転電機、及びその製造方法

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015040482A3 (fr) * 2013-09-17 2015-07-30 Toyota Jidosha Kabushiki Kaisha Dispositif de chauffage de couronne rotor, et procédé d'ajustage serré de couronne rotor
JP2015201920A (ja) * 2014-04-04 2015-11-12 アスモ株式会社 モータ
US10243432B2 (en) * 2015-05-25 2019-03-26 Jtekt Corporation Rotation angle detection device
US20160352190A1 (en) * 2015-05-25 2016-12-01 Jtekt Corporation Rotation angle detection device
WO2017121525A1 (fr) * 2016-01-13 2017-07-20 Fraba B.V. Agencement d'un système de mesure d'angle de rotation sur un boîtier
CN108291823A (zh) * 2016-01-13 2018-07-17 弗瑞柏私人有限公司 旋转角度测量系统在壳体上的布置
US11088598B2 (en) 2016-01-13 2021-08-10 Fraba B.V. Arrangement of a rotational angle measuring system on a housing
FR3056265A1 (fr) * 2016-09-19 2018-03-23 Valeo Systemes De Controle Moteur Compresseur de suralimentation
WO2019193716A1 (fr) * 2018-04-05 2019-10-10 三菱電機株式会社 Moteur, soupape, actionneur et procédé de fabrication de moteur
JPWO2019193716A1 (ja) * 2018-04-05 2020-08-20 三菱電機株式会社 モータ、及びモータ製造方法
WO2020053992A1 (fr) * 2018-09-12 2020-03-19 三菱電機株式会社 Codeur à plaque de blindage de champ magnétique
JPWO2020053992A1 (ja) * 2018-09-12 2020-10-22 三菱電機株式会社 磁界遮蔽板付きエンコーダ
JP7396023B2 (ja) 2019-12-20 2023-12-12 ニデック株式会社 モータ
WO2023068125A1 (fr) * 2021-10-20 2023-04-27 株式会社不二工機 Électrovanne

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