WO2019082410A1 - Unité de barre omnibus, moteur et dispositif électrique de direction assistée - Google Patents

Unité de barre omnibus, moteur et dispositif électrique de direction assistée

Info

Publication number
WO2019082410A1
WO2019082410A1 PCT/JP2018/012631 JP2018012631W WO2019082410A1 WO 2019082410 A1 WO2019082410 A1 WO 2019082410A1 JP 2018012631 W JP2018012631 W JP 2018012631W WO 2019082410 A1 WO2019082410 A1 WO 2019082410A1
Authority
WO
WIPO (PCT)
Prior art keywords
bus bar
stator
guide member
bar unit
foot
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2018/012631
Other languages
English (en)
Japanese (ja)
Inventor
修二 岩崎
服部　隆志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Corp
Original Assignee
Nidec Corp
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 Nidec Corp filed Critical Nidec Corp
Priority to JP2019549818A priority Critical patent/JPWO2019082410A1/ja
Publication of WO2019082410A1 publication Critical patent/WO2019082410A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
    • 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
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto

Definitions

  • the present invention relates to a bus bar unit, a motor and an electric power steering device.
  • bus bar provided with a terminal connected to an external device.
  • terminals extend in the axial direction of the rotor in order to connect the terminals to an external device.
  • the bus bar is disposed in a bus bar holder provided in the motor, and the bus bar holder is supported by the stator.
  • the bus bar includes a terminal connected to an external device, in order to facilitate the connection between the external device and the terminal of the bus bar, it is necessary to accurately position the terminal of the bus bar.
  • the present invention has been made in view of the above problems, and an object thereof is to improve the positional accuracy of the terminals of the bus bar with a simple configuration.
  • a bus bar unit is used in a motor having a stator.
  • the bus bar unit includes one or more bus bars, a bus bar holder, and a guide member.
  • the bus bar has a terminal portion connected to an external device.
  • the bus bar holder is disposed axially above the stator and holds the bus bar.
  • the guide member has one or more foot portions positioned in the stator, and one or more guide portions disposed on the axial direction upper side of the bus bar holder and guiding the terminal portions of the bus bars.
  • the positional accuracy of the guide portion is improved with a simple configuration. Thereby, the positional accuracy of the terminal portion of the bus bar guided by the guide portion can be enhanced.
  • FIG. 1 is a schematic cross-sectional view of the motor of the present embodiment.
  • FIG. 2 is a perspective view of the stator and the bus bar unit as viewed from the upper side.
  • FIG. 3 is a perspective view of the bus bar unit as viewed from the upper side.
  • FIG. 4 is an enlarged view of a part of FIG.
  • FIG. 5 is a perspective view of the phase bus bar as viewed from the upper side.
  • FIG. 6 is a perspective view of the neutral point bus bar as viewed from the upper side.
  • FIG. 7 is a perspective view of the guide member as viewed from above.
  • FIG. 8 is a schematic view of an electric power steering apparatus.
  • the direction in which the central axis A of the rotor 20 extends is simply referred to as “axial direction”, the direction orthogonal to the central axis A is simply referred to as “radial direction”, and the direction around the central axis A is referred to It is simply called “circumferential direction”.
  • the upper side of FIG. 1 in the “axial direction” is simply referred to as “upper side”, and the lower side is simply referred to as “lower side”. Note that the vertical direction does not indicate the positional relationship and direction when it is incorporated into an actual device.
  • FIG. 1 is a schematic cross-sectional view of a motor 100.
  • the motor 100 according to the present embodiment is a brushless motor having three phases of U phase, V phase and W phase.
  • Motor 100 includes housing 10, rotor 20, stator 30, and bus bar unit 50 (see FIG. 2). In FIG. 1, the bus bar unit 50 is omitted.
  • the housing 10 accommodates the rotor 20, the stator 30, and the bus bar unit 50 in an internal space.
  • the housing 10 has a bottomed cylindrical shape and has a cylindrical portion 11 and a bottom portion 12.
  • the cylindrical portion 11 is cylindrical and extends in the axial direction along the central axis A.
  • the bottom 12 is disposed at the lower end of the cylindrical portion 11 and extends radially inward from the lower end of the cylindrical portion 11.
  • the bottom portion 12 has a shaft through hole 12 a and a bearing holding portion 12 b.
  • the shaft through hole 12 a is provided at the center of the bottom 12.
  • the rotor 20 has a shaft 21, a rotor core 22, and a magnet 23.
  • the shaft 21 extends in the axial direction, is supported by a pair of bearings 40 disposed in the housing 10 and is rotatable about a central axis A.
  • the rotor core 22 is a laminated steel plate in which a plurality of electromagnetic steel plates are laminated in the axial direction.
  • the rotor core 22 is fixed to a shaft 21 penetrating the center of the rotor core 22 and rotates with the shaft 21.
  • the magnet 23 is fixed to the outer surface of the rotor core 22 and rotates with the rotor core 22 and the shaft 21.
  • the rotor 20 in the present embodiment is a rotor used for an SPM (Surface Permanent Magnet) motor.
  • the rotor 20 may be a rotor used in an IPM (Interior Permanent Magnet) motor in which the magnet 23 is embedded in the rotor core 22.
  • FIG. 2 is a perspective view of stator 30 and bus bar unit 50 as viewed from the upper side.
  • the stator 30 surrounds the radially outer side of the rotor 20.
  • the stator 30 has a plurality of divided stator cores 31, a plurality of insulators 32, and a plurality of coils 33.
  • the stator core 31 is a laminated steel plate in which a plurality of electromagnetic steel plates are laminated in the axial direction.
  • the stator cores 31 are arranged in the circumferential direction and each have a core back 31a and teeth 31b (see FIG. 1).
  • the core back 31 a has a cylindrical shape concentric with the central axis A.
  • the teeth 31 b extend radially inward from the inner side surface of the core back 31 a. In the present embodiment, twelve teeth 31 b are provided.
  • the insulator 32 is attached to each tooth 31 b and covers at least a part of the stator core 31. Specifically, the insulator 32 covers at least the upper end surface and the lower end surface of each tooth 31 b.
  • the insulator 32 is formed of, for example, an insulating material such as a resin.
  • the insulator 32 has a positioning portion 32a on the radially outer side.
  • the positioning part 32a performs positioning of the circumferential direction of the guide member 54 mentioned later.
  • the positioning portion 32a can restrict the movement of the bus bar holder 51 described later in the circumferential direction. Details of the positioning unit 32a will be described later.
  • the coil 33 is configured by winding a conductive wire around the teeth 31 b via the insulator 32.
  • the coil 33 in the present embodiment is configured by a plurality of coil groups in which two coils 33 are connected by one lead, and each of the coil groups corresponds to any of U phase, V phase, and W phase Do.
  • Two coil wires 33a are drawn out from the coil group. In FIG. 2, illustration of the coil wire 33 a is omitted.
  • FIG. 3 is a perspective view of the bus bar unit 50 as viewed from the upper side.
  • the bus bar unit 50 has a plurality of power supply systems with one set of U phase, V phase and W phase as one system.
  • the bus bar unit 50 has two power supply systems.
  • the bus bar unit 50 includes a bus bar holder 51, one or more bus bars 52, one or more neutral point bus bars 53N, and a guide member 54.
  • the bus bar holder 51 is a member for holding the bus bar 52 and the neutral point bus bar 53N, and is formed of an insulating material such as resin.
  • the bus bar holder 51 holds the bus bars 52 including the bus bar 52 and the neutral point bus bar 53N in a state of being electrically insulated from each other via a spacer or the like (not shown).
  • the bus bar holder 51 is annular, and is disposed on the axial direction upper side of the stator 30.
  • the bus bar holder 51 has a plurality of support portions 51 a and a plurality of notches 51 b.
  • the support portion 51 a axially extends downward toward the stator 30 radially outward and is supported by the stator 30 in the axial direction.
  • the lower end portion of the support portion 51 a contacts the upper portion of the core back 31 a of the stator core 31, whereby the bus bar holder 51 is supported by the stator 30 in the axial direction.
  • six supporting portions 51a are provided at intervals in the circumferential direction.
  • the notches 51 b are recessed inward in the radial direction from the outer peripheral portion of the bus bar holder 51 and provided at intervals in the circumferential direction.
  • the bus bar 52 is formed of a plate-like member having conductivity.
  • the bus bar 52 is a phase bus bar corresponding to any of U phase, V phase and W phase, and in this embodiment, phase bus bars 52U, 52V and 52W corresponding to the U phase, V phase and W phase Two each are provided.
  • FIG. 5 is a perspective view of one phase of the phase bus bars 52U, 52V, 52W held by the bus bar holder 51 as viewed from the upper side.
  • the phase bus bars 52U, 52V, 52W corresponding to the U phase, the V phase, and the W phase are different in shape from one another.
  • Each of the phase bus bars 52U, 52V, 52W includes a bus bar main portion 52a, a connection portion 52b, and a terminal portion 52c.
  • the bus bar main body portion 52a extends in the circumferential direction and both end portions extend radially outward.
  • the bus bar main body portion 52a has a plate shape, and the thickness direction coincides with the axial direction.
  • connection portion 52 b is a portion electrically connected to the coil wire 33 a by laser welding or the like.
  • the connection portion 52 b extends axially upward from one end of the bus bar main portion 52 a.
  • the connection portion 52 b has a coil wire holding portion 52 d having a substantially U shape in a top view at a plan view.
  • the terminal portion 52c is a portion electrically connected to an external device (not shown).
  • the terminal portion 52c extends axially upward from the other end of the bus bar main portion 52a.
  • FIG. 6 is a perspective view of one neutral point bus bar 53N held by the bus bar holder 51 as viewed from the upper side.
  • the neutral point bus bar 53N is formed of a plate-like member having conductivity. In the present embodiment, as shown in FIG. 3, two neutral point bus bars 53N are provided.
  • the neutral point bus bar 53N forms an electrical neutral point by connecting coil groups corresponding to the U phase, the V phase, and the W phase.
  • the neutral point bus bar 53N has a bus bar main body portion 53a and a plurality of connection portions 53b.
  • the bus bar main body portion 53a extends in the circumferential direction and the middle portion and both end portions extend radially outward.
  • the bus bar main body portion 53a has a plate shape, and the thickness direction coincides with the axial direction.
  • connection portion 53 b is a portion electrically connected to the coil wire 33 a by laser welding or the like.
  • the connection portion 53 b extends axially upward from the middle portion and both end portions of the bus bar main portion 52 a.
  • the connection portion 53b has a coil wire holding portion 53d having a substantially U shape in a top view at a plan view.
  • FIG. 7 is a perspective view of the guide member 54 as viewed from the upper side.
  • the guide members 54 are provided to guide the terminal portions 52c of the phase bus bars 52U, 52V, 52W.
  • the guide member 54 covers the bus bar holder 51 from the upper side in the axial direction.
  • the guide member 54 has an annular portion 54a, one or more foot portions 54b, and one or more guide portions 54c.
  • the annular portion 54 a is disposed so as to cover the bus bar holder 51 from the upper side in the axial direction.
  • a plurality of notches 54d recessed inward in the radial direction are provided at intervals in the circumferential direction.
  • Notch portion 54 d is provided at a position overlapping with notch portion 51 b of bus bar holder 51 in the axial direction.
  • One connection portion 52b of the phase bus bar 52U, 52V, 52W and one connection portion 53b of the neutral point bus bar 53N are disposed in the notch portion 54d.
  • the one or more foot portions 54 b extend in a plate shape axially downward from the outer peripheral portion of the annular portion 54 a toward the stator 30. It is preferable that a plurality of foot portions 54b be provided at intervals in the circumferential direction. In the present embodiment, as shown in FIG. 7, two foot portions 54 b are provided at intervals of 180 degrees in the circumferential direction.
  • the foot portion 54 b is provided with a gap between itself and the stator 30 in the axial direction. Therefore, the guide member 54 is supported by the bus bar holder 51 in the axial direction.
  • the foot portion 54 b is positioned directly on the stator 30 in the circumferential direction relative to the stator 30.
  • the foot 54 b is positioned on the stator 30 via the insulator 32. More specifically, the foot portion 54 b is positioned immovably in the circumferential direction relative to the stator 30 by the positioning portion 32 a of the insulator 32.
  • the positioning portion 32 a is provided on the core back 31 a of the stator 30.
  • the positioning portion 32 a is a recess that extends in the axial direction and is open at the radially outer side.
  • the positioning portion 32a has a first side wall 32b and a second side wall 32c.
  • the first side wall 32b and the second side wall 32c face each other at an interval in the circumferential direction.
  • the foot portion 54b is pinched on both sides in the circumferential direction by the first side wall portion 32b and the second side wall portion 32c of the positioning portion 32a.
  • the foot portion 54b is positioned immovably in the circumferential direction with respect to the stator 30.
  • Positioning portion 32 a can regulate movement of support portion 51 a of bus bar holder 51 in the circumferential direction.
  • the support portion 51 a of the bus bar holder 51 is disposed on the positioning portion 32 a at a position different from the foot portion 54 b of the guide member 54 in the circumferential direction.
  • the circumferential length of the support portion 51 a of the bus bar holder 51 is formed shorter than the circumferential length of the foot portion 54 b of the guide member 54.
  • the circumferential position of the support portion 51 a of the bus bar holder 51 is roughly positioned by the positioning portion 32 a.
  • the positioning portion 32 a restricts the radial inward movement of the support portion 51 a of the bus bar holder 51 and the foot portion 54 b of the guide member 54.
  • the guide portion 54c is provided to suppress the inclination of the terminal portion 52c of the phase bus bars 52U, 52V, 52W. As shown in FIGS. 2 to 4, the guide portion 54c is disposed on the axial direction upper side of the bus bar holder 51, and guides the terminal portions 52c of the phase bus bars 52U, 52V, 52W.
  • the guide portions 54c are provided in the same number (6) as the number of terminal portions 52c of the phase bus bars 52U, 52V, 52W. Specifically, as shown in FIG. 7, the guide portion 54c protrudes axially upward from the annular portion 54a.
  • the guide portion 54c has a guide hole 54e penetrating in the axial direction.
  • the terminal portions 52c of the phase bus bars 52U, 52V, 52W pass through the guide holes 54e in the axial direction, whereby the terminal portions 52c of the phase bus bars 52U, 52V, 52W are guided by the guide portions 54c.
  • the guide member 54 is directly supported and positioned by the stator 30 in the circumferential direction. Therefore, the guide member 54 can be positioned with respect to the stator 30 with high accuracy. That is, the guide portion 54c provided on the guide member 54 can be positioned with respect to the stator 30 with high accuracy.
  • the positional accuracy of the terminal portions 52c of the phase bus bars 52U, 52V, 52W can be enhanced by the guide portions 54c.
  • the guide member 54 since the guide member 54 is positioned on the stator 30 by the foot portion 54b of the guide member 54, the positional accuracy of the terminal portions 52c of the phase bus bars 52U, 52V, 52W can be enhanced with a simple configuration.
  • FIG. 8 is a schematic view of an electric power steering apparatus 200 having a motor 100 according to the present embodiment.
  • the electric power steering apparatus 200 is mounted on a steering mechanism of a wheel 112 provided in a vehicle (not shown).
  • the electric power steering device 200 is a device that reduces the steering force by hydraulic pressure.
  • the electric power steering apparatus 200 includes a motor 100, a steering shaft 114, an oil pump 116, and a control valve 117.
  • the steering shaft 114 transmits an input from a steering 111 provided on a car to an axle 113 having wheels 112.
  • the oil pump 116 generates hydraulic pressure in a power cylinder 115 that transmits hydraulic driving force to the axle 113.
  • the control valve 117 controls the oil of the oil pump 116.
  • the motor 100 is mounted as a drive source of the oil pump 116.
  • the bus bar unit 50 includes the neutral point bus bar 53N, but the neutral point bus bar 52N is not necessarily required.
  • the bus bar unit 50 may have one or more bus bars 52.
  • a gap is provided between the foot portion 54 b of the guide member 54 and the stator 30 in the axial direction, and the guide member 54 is supported by the bus bar holder 51 in the axial direction. It may be configured to support.
  • Reference Signs List 21 shaft 30 stator 31 stator core 32 insulator 32a positioning portion 50 bus bar unit 51 bus bar holder 51 a support portion 52 bus bar 53 N neutral point bus bar 52 c terminal portion 54 guide member 54 a annular portion 54 b foot portion 54 c guide portion 100 motor 200 electric power steering device

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

Abstract

L'invention concerne une unité (50) de barre omnibus qui comprend au moins une barre omnibus (52), un porte-barre omnibus (51), et un organe de guide (54), l'unité (50) de barre omnibus étant utilisée dans un moteur (100) ayant un stator (30). La barre omnibus (52) a une partie de bornes (52c) connectée à un dispositif externe. Le porte-barre omnibus (51) est disposé sur le côté axialement supérieur du stator (30), et porte la barre omnibus (52). L'organe de guide (54) comprend : au moins une partie de pied (54b) positionnée sur le stator (30) ; et au moins une partie de guide (54c) disposée sur le côté axialement supérieur du porte-barre omnibus (51), la partie de guide (54c) guidant la borne (52c) de la barre omnibus (52).
PCT/JP2018/012631 2017-10-26 2018-03-28 Unité de barre omnibus, moteur et dispositif électrique de direction assistée Ceased WO2019082410A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019549818A JPWO2019082410A1 (ja) 2017-10-26 2018-03-28 バスバーユニット、モータ及び電動パワーステアリング装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762577381P 2017-10-26 2017-10-26
US62/577,381 2017-10-26

Publications (1)

Publication Number Publication Date
WO2019082410A1 true WO2019082410A1 (fr) 2019-05-02

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PCT/JP2018/012631 Ceased WO2019082410A1 (fr) 2017-10-26 2018-03-28 Unité de barre omnibus, moteur et dispositif électrique de direction assistée
PCT/JP2018/012632 Ceased WO2019082411A1 (fr) 2017-10-26 2018-03-28 Unité de barre omnibus et moteur

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PCT/JP2018/012632 Ceased WO2019082411A1 (fr) 2017-10-26 2018-03-28 Unité de barre omnibus et moteur

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JP (2) JPWO2019082410A1 (fr)
WO (2) WO2019082410A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112583170A (zh) * 2019-09-30 2021-03-30 日本电产株式会社 汇流条装置、定子以及马达
CN114884257A (zh) * 2021-02-05 2022-08-09 日本电产株式会社 马达
KR20240008274A (ko) * 2022-07-11 2024-01-18 한온시스템 주식회사 냉매 압축기를 구동하기 위한 전기 모터와의 전기적접점을 설정하기 위한 조립체, 냉매 압축기를 구동하기 위한 전기 모터, 및 전기 모터와의 전기적 접점을 설정하기 위한 방법
CN120435814A (zh) * 2024-12-23 2025-08-05 马渊马达株式会社 汇流条单元以及无刷马达

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KR20210123916A (ko) * 2020-04-06 2021-10-14 엘지이노텍 주식회사 모터

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JP2016185034A (ja) * 2015-03-26 2016-10-20 株式会社東芝 回転電機
WO2017138534A1 (fr) * 2016-02-08 2017-08-17 日本電産株式会社 Stator, moteur et compresseur

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JP5842361B2 (ja) * 2010-10-29 2016-01-13 日本電産株式会社 モータ及びモータの製造方法
JP6638295B2 (ja) * 2015-09-30 2020-01-29 アイシン精機株式会社 回転電機

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JP2011182512A (ja) * 2010-02-26 2011-09-15 Nsk Ltd バスバーユニット及びこれを備えた回転電機
JP2011205875A (ja) * 2010-03-03 2011-10-13 Nippon Densan Corp バスバーユニット及びモータ
JP2013042633A (ja) * 2011-08-19 2013-02-28 Nippon Densan Corp モータ
JP2013150503A (ja) * 2012-01-23 2013-08-01 Toyota Motor Corp 回転電機のステータ
WO2014171006A1 (fr) * 2013-04-19 2014-10-23 三菱電機株式会社 Machine dynamo-électrique
JP2016013053A (ja) * 2014-06-04 2016-01-21 アスモ株式会社 電機子及びモータ
JP2016185034A (ja) * 2015-03-26 2016-10-20 株式会社東芝 回転電機
WO2017138534A1 (fr) * 2016-02-08 2017-08-17 日本電産株式会社 Stator, moteur et compresseur

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112583170A (zh) * 2019-09-30 2021-03-30 日本电产株式会社 汇流条装置、定子以及马达
JP2021058011A (ja) * 2019-09-30 2021-04-08 日本電産株式会社 バスバー装置、ステータおよびモータ
CN114884257A (zh) * 2021-02-05 2022-08-09 日本电产株式会社 马达
KR20240008274A (ko) * 2022-07-11 2024-01-18 한온시스템 주식회사 냉매 압축기를 구동하기 위한 전기 모터와의 전기적접점을 설정하기 위한 조립체, 냉매 압축기를 구동하기 위한 전기 모터, 및 전기 모터와의 전기적 접점을 설정하기 위한 방법
JP2024009796A (ja) * 2022-07-11 2024-01-23 ハンオン システムズ 冷媒圧縮機駆動用電動機との電気的接触を確立するための組立体、冷媒圧縮機駆動用電動機、および電動機との電気的接触を確立する方法
JP7762689B2 (ja) 2022-07-11 2025-10-30 ハンオン システムズ 冷媒圧縮機駆動用電動機との電気的接触を確立するための組立体、冷媒圧縮機駆動用電動機、および電動機との電気的接触を確立する方法
KR102903563B1 (ko) * 2022-07-11 2025-12-23 한온시스템 주식회사 냉매 압축기를 구동하기 위한 전기 모터와의 전기적 접점을 설정하기 위한 조립체, 냉매 압축기를 구동하기 위한 전기 모터, 및 전기 모터와의 전기적 접점을 설정하기 위한 방법
CN120435814A (zh) * 2024-12-23 2025-08-05 马渊马达株式会社 汇流条单元以及无刷马达

Also Published As

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WO2019082411A1 (fr) 2019-05-02
JPWO2019082410A1 (ja) 2020-11-05
JPWO2019082411A1 (ja) 2020-11-05

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