WO2022014460A1 - Stator - Google Patents

Stator Download PDF

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Publication number
WO2022014460A1
WO2022014460A1 PCT/JP2021/025800 JP2021025800W WO2022014460A1 WO 2022014460 A1 WO2022014460 A1 WO 2022014460A1 JP 2021025800 W JP2021025800 W JP 2021025800W WO 2022014460 A1 WO2022014460 A1 WO 2022014460A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
stator
coil
teeth
terminal
Prior art date
Application number
PCT/JP2021/025800
Other languages
English (en)
Japanese (ja)
Inventor
孝則 牧野
Original Assignee
株式会社デンソー
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 株式会社デンソー filed Critical 株式会社デンソー
Publication of WO2022014460A1 publication Critical patent/WO2022014460A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient poles
    • 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
    • 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

Definitions

  • This disclosure relates to the stator.
  • An object of the present disclosure is to provide an inexpensive and compact stator.
  • the present disclosure is a stator of an inner rotor type rotary electric machine, in which a stator core having a plurality of teeth, a plurality of windings having a coil wound around the teeth, and one end or the other end of the winding are described. It comprises a plurality of winding holding portions for holding and a plurality of coil terminals having winding connection portions connected to the windings.
  • the winding has two or more coils between one end and the other end of the winding.
  • the winding holding portion and the winding connecting portion are arranged radially inside the coil.
  • the nozzle winding that continuously winds two or more teeth from the winding start to the winding end of the winding is performed.
  • FIG. 1 is a schematic diagram illustrating a shift-by-wire system to which a rotary actuator including the motor of the first embodiment is applied.
  • FIG. 2 is a cross-sectional view of the rotary actuator of FIG.
  • FIG. 3 is a view of the stator and control board of FIG. 2 as viewed from the direction of arrow III.
  • FIG. 4 is an enlarged view of a main part of the stator of FIG.
  • FIG. 5 is a view of the stator of FIG. 4 as viewed from the direction of arrow V.
  • FIG. 6 is a diagram schematically showing the winding and coil terminals of FIG. FIG.
  • FIG. 7 is a view of the stator, motor terminal, and sensor terminal of FIG. 2 as viewed from the direction of arrow VII.
  • FIG. 8 is a view of the stator of the second embodiment as viewed from the axial direction, and is a view corresponding to FIG. 3 of the first embodiment.
  • FIG. 9 is a diagram schematically showing the winding and coil terminals of FIG.
  • the motor 30 as the inner rotor type rotary electric machine of the first embodiment is provided in the rotary actuator (hereinafter, actuator) 10.
  • the actuator 10 is fixed to the outer wall of the case 12 of the vehicle transmission 11 and is used as a power source for the shift-by-wire system 13.
  • the control device 15 controls the actuator 10 in response to a command signal from the shift operation device 14 to operate the shift range switching mechanism 16 of the transmission 11 to switch the shift range.
  • the actuator 10 includes a housing 20, a motor 30, and a speed reducer 40.
  • the housing 20 has a cup-shaped front housing 21 and a rear housing 22.
  • the front housing 21 and the rear housing 22 are combined with each other and fastened to each other by bolts 23.
  • a bottomed cylindrical metal plate 24 is inserted into the front housing 21.
  • the rear housing 22 has a tubular protrusion 28 that projects to the opposite side of the front housing 21.
  • a bracket 29 is fixed to the outer wall of the rear housing 22.
  • the actuator 10 is fixed to the case 12 (see FIG. 1) of the transmission 11 by using the bracket 29.
  • the motor 30 has a stator 31 and a rotor 34.
  • the stator 31 has a stator core 32 fixed to the metal plate 24 by, for example, press fitting, and a winding 33 provided on the stator core 32.
  • the rotor 34 has a rotary shaft 37 rotatably supported around the rotary shaft center AX1 by a motor side bearing 35 and a speed reducer side bearing 36, and a rotor core 38 fitted and fixed to the outside of the rotary shaft 37. ..
  • the motor side bearing 35 is provided on the metal plate 24.
  • the speed reducer side bearing 36 is provided on the output member 44, which will be described later.
  • the speed reducer 40 includes an eccentric shaft 41, a ring gear 42, an eccentric gear 43, an output member 44, and a transmission mechanism 45.
  • the eccentric shaft 41 is provided on the eccentric shaft center AX2 that is eccentric with respect to the rotation shaft center AX1, and is integrally formed with the rotation shaft 37.
  • the ring gear 42 is provided coaxially with the rotation axis AX1 and is fixed to the rear housing 22.
  • the eccentric gear 43 has an external tooth portion 47 that meshes with the internal tooth portion 46 of the ring gear 42, and is supported by a bearing 48 provided on the eccentric shaft 41 so as to be able to move planetarily.
  • the planetary motion is a motion that revolves around the rotation axis AX1 while rotating around the eccentric axis AX2. The rotation speed of the eccentric gear 43 during planetary motion is changed with respect to the rotation speed of the rotation shaft 37.
  • the output member 44 is provided coaxially with the rotation axis AX1 and is rotatably supported by a bearing 49 provided in the rear housing 22.
  • the transmission mechanism 45 is composed of an engaging protrusion 51 formed in the eccentric gear 43 and an engaging hole 52 formed in the output member 44 into which the engaging protrusion 51 is inserted, and is composed of an eccentric axis AX2 of the eccentric gear 43. The rotation around it is transmitted to the output member 44.
  • a rotating magnetic field is generated by switching the energizing phase of the winding 33, and the rotor 34 rotates under the magnetic attraction or repulsion force generated by the rotating magnetic field.
  • the eccentric shaft 41 rotates around the rotation axis AX1 together with the rotor 34, the eccentric gear 43 makes a planetary motion, and the rotation of the eccentric gear 43 decelerated with respect to the rotation of the rotor 34 is output from the output member 44.
  • the stator 31 includes a stator core 32, a plurality of windings 33, an insulator 61 interposed between the stator core 32 and the winding 33, and a plurality of windings 33 connected to the stator core 32. It is provided with a coil terminal 81.
  • the stator core 32 is composed of a plurality of metal plates laminated in the axial direction.
  • the stator core 32 has an annular yoke 55 fixed to the inner wall of the tubular portion 25 of the front housing 21, and a plurality of teeth 56 formed so as to project radially inward from the yoke 55.
  • the insulator 61 includes a yoke insulating portion 62 provided on both ends in the axial direction of the yoke 55 and an inner wall on the inner side in the radial direction, and a portion around the teeth 56 (that is, other than the tip surface of the teeth 56).
  • the plurality of windings 33 include U-phase windings 33u1, 33u2, V-phase windings 33v1, 33v2, and W-phase windings 33w1, 33w2.
  • the U-phase winding 33u1, the V-phase winding 33v1 and the W-phase winding 33w1 form the first winding set
  • the U-phase winding 33u2, the V-phase winding 33v2 and the W-phase winding 33w2 form the first winding set.
  • the second winding set is configured.
  • the winding 33 is made redundant by providing two systems. Hereinafter, when each winding is not distinguished, it is simply described as "winding 33".
  • the winding 33 has a coil 71 wound around the teeth 56, that is, around the teeth insulating portion 63 of the insulator 61.
  • One winding 33 consists of one electric wire and has two coils 71 between one end 72 and the other end 73 thereof.
  • a crossover line 74 is provided between the coils 71. That is, one winding 33 is provided across the two teeth 56.
  • the U-phase winding 33u1 has coils 71u1 and 71u4, and the U-phase winding 33u2 has coils 71u2 and 71u3.
  • the V-phase winding 33v1 has coils 71v1 and 71v4, and the V-phase winding 33v2 has coils 71v2 and 71v3.
  • the W-phase winding 33w1 has coils 71w1 and 71w4, and the W-phase winding 33w2 has coils 71w2 and 71w3.
  • twelve teeth 56 are provided, and one coil 71 is provided for each tooth 56.
  • One winding 33 has a coil 71 for one phase.
  • the yoke insulating portion 62 has a protruding locking portion 65 protruding toward the bottom 26 side of the front housing 21.
  • the locking portion 65 locks the crossover line 74.
  • the locking portion 65 is integrally provided with the insulator 61.
  • the actuator 10 includes a magnet 57 provided in the rotor core 38, an element for detecting the rotational position of the rotor 34, a magnetic sensor 58 for detecting the magnetism of the magnet 57, and magnetism.
  • a control board 59 on which a sensor 58 is mounted is provided.
  • the front housing 21 has a bottom portion 26, a cylinder portion 25, and a connector portion 27 constituting a resin main body portion.
  • the connector portion 27 is formed on the outside of the tubular portion 25.
  • An external connector 17 is detachably connected to the connector portion 27.
  • the external connector 17 holds a power supply terminal 18 and a signal terminal 19.
  • the front housing 21 includes a plurality of motor terminals 91 as external connection terminals that are connected to the coil terminal 81 and can be directly connected to the external power supply terminal 18. It has a plurality of sensor terminals 95 that are connected to the control board 59 and can be connected to the external signal terminal 19.
  • the motor terminal 91 and the sensor terminal 95 are inserted into the main body portion of the front housing 21, and extend from the bottom portion 26 to the connector portion 27 through the tubular portion 25. In the first embodiment, the motor terminal 91 and the sensor terminal 95 are inserted into the front housing 21 while being held by the primary molded body 99.
  • a terminal holding portion 67 for holding the coil terminal 81 is provided on the bottom 26 side of the front housing 21 of the flange portions 64.
  • the terminal holding portion 67 is integrally provided with the insulator 61.
  • the coil terminal 81 is electrically connected to the held portion 82 held by the terminal holding portion 67, the winding holding portion 83 holding one end 72 or the other end 73 of the winding 33, and the winding 33. It has a winding connection portion 84 and a contact portion 85 that is in contact with the motor terminal 91 and is electrically connected.
  • the winding holding portion 83 is integrally provided with the coil terminal 81.
  • One coil terminal 81 is provided for each tooth 56. Of the 12 coil terminals 81, one end 72 is connected to 6 coil terminals 81, and the other end 73 is connected to the other 6 coil terminals 81.
  • the coil terminals 81 are provided at both ends of the winding 33, respectively, and two coil terminals 81 are provided for each phase of the winding.
  • One end 72 which is the winding start portion of the winding 33, extends from the winding holding portion 83 to the teeth 56 through the winding connecting portion 84.
  • the other end 73 which is the winding end portion of the winding 33, extends from the teeth 56 through the winding connecting portion 84 to the winding holding portion 83.
  • the motor terminal 91 has a contacted portion 92 that is axially abutted against the abutting portion 85 of the coil terminal 81 while extending in a direction perpendicular to the axial direction.
  • the coil terminal 81 is directly connected to the motor terminal 91 without a connection component such as a bus bar.
  • the contact portion 85 and the contacted portion 92 are connected by welding.
  • the joint portion between the contact portion 85 and the contact portion 92 will be appropriately referred to as a “welded portion”.
  • the winding holding portion 83 and the winding connecting portion 84 are arranged radially inside the coil 71, and the welded portion is arranged radially inside the tooth tip of the stator core 32.
  • the winding holding portion 83 and the winding connecting portion 84 are formed so as to extend from the held portion 82 toward the bottom portion 26 in the axial direction.
  • the contact portion 85 is formed so as to extend radially inward from the tip of the winding holding portion 83.
  • the winding holding portion 83 and the winding connecting portion 84 are respectively branched from the held portion 82.
  • the winding 33 is manufactured by nozzle winding. Specifically, the electric wire is entwined with the winding holding portion 83, passed through the winding connecting portion 84, and then wound around the first tooth insulating portion 63. Subsequently, the electric wire drawn from the first teeth insulating portion 63 is locked to the locking portion 65, and then wound around the second teeth insulating portion 63. Finally, the electric wire drawn from the second tooth insulating portion 63 is passed through a winding connecting portion 84 different from the first one, and then entwined with the winding holding portion 83.
  • the winding connection portion 84 and the winding 33 are connected by, for example, fusing.
  • the winding work is performed across multiple slots.
  • the locking portion 65 arranged on the outer peripheral portion of the stator 31 and the winding holding portion 83 and the winding connecting portion 84 arranged on the inner peripheral portion are used, the number of winding layers of the electric wire around the teeth insulating portion 63 is determined. By making it an odd number, perfect alignment winding is realized.
  • the first and third layers of the winding 33 are wound from the radial inside to the outside, and the second layer is wound from the radial outside to the inside.
  • the stator 31 has a stator core 32 having a plurality of teeth 56, a plurality of windings 33 having a coil 71 wound around the teeth 56, and one end of the winding 33. It includes a plurality of winding holding portions 83 for holding the portion 72 or the other end portion 73, and a plurality of coil terminals 81 having a winding connecting portion 84 connected to the winding 33.
  • the winding 33 has two or more coils 71 between one end 72 and the other end 73.
  • the winding holding portion 83 and the winding connecting portion 84 are arranged radially inside the coil 71.
  • the winding holding portion 83 and the winding connecting portion 84 located on the inner peripheral portion of the stator 31 are used to continuously wind the winding 33 on two or more teeth 56 from the winding start to the winding end.
  • Nozzle winding can be performed. Therefore, it is possible to avoid the coil terminal 81 being provided so as to protrude outward in the radial direction while adopting a nozzle winding that can be manufactured at low cost. Therefore, an inexpensive and compact stator 31 can be obtained.
  • the one end portion 72 extends from the winding winding holding portion 83 to the teeth 56 through the winding winding connecting portion 84.
  • the other end 73 extends from the teeth 56 through the winding connecting portion 84 to the winding holding portion 83. Therefore, by passing the electric wire through the winding connection portion 84 in the winding process of the winding 33, the operation of the winding 33 becomes unnecessary in the connection process between the winding connection portion 84 and the winding 33, and only crimping is performed. Therefore, the connection process can be simplified.
  • the winding holding portion 83 is integrally provided with the coil terminal 81. This makes it easy to secure the strength of the winding holding portion 83.
  • the winding 33 has four coils 71 between one end 72 and the other end 73.
  • the U-phase winding 33u has coils 71u11, 71u12, 71u21, 71u22
  • the V-phase winding 33v has coils 71v11, 71v12, 71v21, 71v22
  • the W-phase winding 33w has coils 71w11, 71w12, 71w21, 71w22.
  • the coils 71u11 and 71u12 from one end 72 to the intermediate 74c and the 71u21 and 71u22 from the intermediate 74c to the other end 73 are arranged in parallel.
  • the first coil group and the second coil group are arranged in parallel.
  • the plurality of coil terminals are an intermediate portion between a first coil terminal 811 having a first winding connection portion 841 connected to one end portion 72 and the other end portion 73 and two coils 71 included in one winding 33.
  • the shapes of the first coil terminal 811 and the second coil terminal 812 are the same as the shapes of the coil terminals 81 in the first embodiment.
  • the first winding connection portion 841 of the first coil terminal 811 and the second winding connection portion 842 of the second coil terminal 812 are arranged radially inside the coil 71.
  • One end 72 and the other end 73 included in one winding 33 are connected to the same first winding connection portion 841.
  • the winding 33 is manufactured by nozzle winding. Specifically, the electric wire is entwined with the first winding holding portion 831 and passed through the first winding connecting portion 841, and then wound around the first tooth insulating portion 63. Subsequently, the electric wire drawn from the first teeth insulating portion 63 is locked to the locking portion 65, and then wound around the second teeth insulating portion 63. Subsequently, the electric wire drawn from the second tooth insulating portion 63 is passed through the second winding connection portion 842, locked to the locking portion 65, and then wound around the third tooth insulating portion 63.
  • the electric wire drawn from the third tooth insulating portion 63 is locked to the locking portion 65, and then wound around the fourth tooth insulating portion 63.
  • the electric wire drawn from the fourth tooth insulating portion 63 is passed through the first winding connecting portion 841 and then entwined with the first winding holding portion 831.
  • the first winding connection portion 841 and the one end portion 72 and the other end portion 73 are connected by, for example, fusing.
  • the second winding connection portion 842 and the intermediate portion 74c are also connected by, for example, fusing.
  • the two coil terminals can be replaced with one second coil terminal 812, and the windings can be replaced.
  • the number of terminal processes of 33 can be reduced. Therefore, the number of parts and the manufacturing man-hours can be reduced.
  • the one end portion 72 and the other end portion 73 included in one winding 33 are connected to the same first winding connection portion 841.
  • the two coil terminals can be replaced with one first coil terminal 811 not only on the intermediate portion 74c side but also on the end portion side, and the number of terminal processing of the winding 33 can be reduced. Therefore, the number of parts and the manufacturing man-hours can be further reduced.
  • the first winding connection portion 841 and the second winding connection portion 842 are arranged radially inside the coil 71. Therefore, as in the first embodiment, the winding connecting portions 841 and 842 located at the inner peripheral portion of the stator 31 are used to form two or more teeth 56 from the winding start to the winding end of the winding 33. Nozzle winding that is continuously wound can be performed. Therefore, it is possible to avoid the coil terminals 811 and 812 being provided so as to protrude outward in the radial direction while adopting a nozzle winding that can be manufactured at low cost. Therefore, an inexpensive and compact stator 31 can be obtained.
  • the winding holding portion is not limited to a part of the coil terminal, but may be a part of an insulator or other members, for example.
  • the extending direction of the winding holding portion is not limited to the axial direction, but may be a radial direction, a circumferential direction, or a direction other than that.
  • the joining between the coil terminal and the motor terminal is not limited to welding, but may be performed by other methods such as pressure welding or soldering.
  • the connector portion of the front housing may be divided into two or more.
  • the number of teeth is not limited to 12, and may be any other number.
  • the number of winding phases is not limited to three, and may be any other phase.
  • the stator is not limited to a motor and may be applied to a generator.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

Un stator (31) est utilisé comme machine tournante du type à rotor intérieur (30). Le stator (31) comprend un noyau de stator (32) possédant une pluralité de dents (56), une pluralité d'enroulements (33) comportant des bobines (71) enroulés autour des dents (56), une pluralité de parties de maintien d'enroulements (83) qui maintiennent une extrémité (72) ou l'autre extrémité (73) des enroulements, et une pluralité de bornes de bobine (81) possédant des parties de connexion d'enroulement (84) connectées aux enroulements (33). Les enroulements (33) comportent chacun deux ou plusieurs bobines (71) entre la première extrémité (72) et l'autre extrémité (73). Les parties de maintien d'enroulement (83) et les parties de connexion d'enroulement (84) sont positionnées davantage à l'intérieur dans la direction radiale que les bobines (71).
PCT/JP2021/025800 2020-07-14 2021-07-08 Stator WO2022014460A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-120471 2020-07-14
JP2020120471A JP7347352B2 (ja) 2020-07-14 2020-07-14 ステータ

Publications (1)

Publication Number Publication Date
WO2022014460A1 true WO2022014460A1 (fr) 2022-01-20

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PCT/JP2021/025800 WO2022014460A1 (fr) 2020-07-14 2021-07-08 Stator

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JP (1) JP7347352B2 (fr)
WO (1) WO2022014460A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100156208A1 (en) * 2008-06-26 2010-06-24 Zf Friedrichshafen Ag Stator for an electric machine
JP2018516048A (ja) * 2015-05-13 2018-06-14 ツェットエフ、フリードリッヒスハーフェン、アクチエンゲゼルシャフトＺｆ Ｆｒｉｅｄｒｉｃｈｓｈａｆｅｎ Ａｇ カプセル化された結線装置を有した電気機械用ステータおよびそのようなステータを有した電気機械
WO2019220635A1 (fr) * 2018-05-18 2019-11-21 三菱電機株式会社 Stator, machine dynamo-électrique, et procédé de fabrication de stator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100156208A1 (en) * 2008-06-26 2010-06-24 Zf Friedrichshafen Ag Stator for an electric machine
JP2018516048A (ja) * 2015-05-13 2018-06-14 ツェットエフ、フリードリッヒスハーフェン、アクチエンゲゼルシャフトＺｆ Ｆｒｉｅｄｒｉｃｈｓｈａｆｅｎ Ａｇ カプセル化された結線装置を有した電気機械用ステータおよびそのようなステータを有した電気機械
WO2019220635A1 (fr) * 2018-05-18 2019-11-21 三菱電機株式会社 Stator, machine dynamo-électrique, et procédé de fabrication de stator

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JP2022017750A (ja) 2022-01-26
JP7347352B2 (ja) 2023-09-20

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