WO2019181571A1 - Moteur et dispositif de direction assistée électrique - Google Patents

Moteur et dispositif de direction assistée électrique Download PDF

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Publication number
WO2019181571A1
WO2019181571A1 PCT/JP2019/009432 JP2019009432W WO2019181571A1 WO 2019181571 A1 WO2019181571 A1 WO 2019181571A1 JP 2019009432 W JP2019009432 W JP 2019009432W WO 2019181571 A1 WO2019181571 A1 WO 2019181571A1
Authority
WO
WIPO (PCT)
Prior art keywords
bent
motor
connection
motor according
bending point
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/JP2019/009432
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English (en)
Japanese (ja)
Inventor
瑞貴 仁平
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 CN201980020373.6A priority Critical patent/CN111919365B/zh
Publication of WO2019181571A1 publication Critical patent/WO2019181571A1/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
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of 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
    • H02K3/52—Fastening salient pole windings or connections thereto

Definitions

  • the present invention relates to a motor and an electric power steering apparatus.
  • a motor having a bus bar having a connection terminal and connecting a stator and an external power source by the connection terminal is known (see Japanese Patent No. 6053001).
  • connection terminal When the connection terminal is connected to the control board, the connection terminal has a first connection part connected to the bus bar at the lower end and a second connection part connected to the control board at the upper end.
  • the connection terminal has a straight line portion between the first connection portion and the second connection portion.
  • an object of the present invention is to provide a motor capable of reducing the stress of a connection destination component due to thermal expansion of a connection terminal.
  • a motor includes a shaft extending along a central axis, a rotor fixed to the shaft, a stator including a conductive portion disposed radially outside or inside the rotor, and connected to the conductive portion.
  • the connection terminal has a first connection part connected to the conducting member and a second connection part connected to the control board or an external power source, and a bent part and a straight part between the first connection part and the second connection part.
  • the motor it is possible to reduce the stress of the connection destination component due to the thermal expansion of the connection terminal. Therefore, according to the electric power steering apparatus according to an embodiment of the present application, the reliability of electrical connection with a motor attached to the electric power steering apparatus can be increased.
  • FIG. 1 is a cross-sectional view showing a motor according to an embodiment.
  • FIG. 2 is a side view of the connection terminal connected to the control board.
  • FIG. 3 is a side view of a connection terminal according to a modification.
  • FIG. 4 is a side view of a connection terminal according to another modification.
  • FIG. 5 is a schematic diagram of an electric power steering apparatus according to another embodiment.
  • the central axis of the motor is C.
  • the direction in which the central axis C extends is the axial direction.
  • One along the axial direction is the upper side and the other is the lower side.
  • the vertical direction in this specification is used to specify the positional relationship, and does not limit the actual direction or positional relationship.
  • the direction of gravity is not necessarily downward.
  • a direction perpendicular to the rotation axis of the motor is referred to as a “radial direction”.
  • the direction along the arc centered on the rotation axis of the motor is called “circumferential direction”.
  • Connection a connection terminal to a connection destination component such as a control board or an external power source includes not only a case where the connection terminal is physically directly connected, but also a case where the connection terminal is indirectly connected via another component. “Bending” includes not only bending at an acute angle but also bending.
  • the motor 1 includes a shaft 31, a rotor 30, a stator 40, a housing 20, and a bus bar holder 50.
  • the shaft 31 extends along the central axis C, and is supported rotatably around the central axis C by an upper bearing (not shown) and a lower bearing 69 supported by the bearing holder.
  • the rotor 30 is fixed to the shaft 31 and rotates around the central axis C together with the shaft 31.
  • the stator 40 is disposed on the outer side in the radial direction of the rotor 30 so as to face the rotor 30.
  • the stator 40 includes a stator core 41, an insulator 42, and a coil wire 43.
  • the insulator 42 is attached to the teeth (not shown) of the stator core 41.
  • the coil wire 43 is an example of a conductive portion, is constituted by a conductive wire, and is wound around a tooth with an insulator 42 interposed.
  • the coil wire 43 drawn from the coil wire 43 wound around the stator 40 to the upper side of the stator 40 is connected to a bus bar 51 described later.
  • the housing 20 is disposed on the radially outer side of the stator 40.
  • the stator 40 is fixed to the inner peripheral surface of the housing 20 by shrink fitting or caulking.
  • the housing 20 has a bottomed cylindrical shape with the central axis C as the center.
  • the housing 20 includes a cylindrical portion 21 that extends in the axial direction, a bottom portion 23 that is positioned at the lower end of the cylindrical portion 21, and an opening portion 24 that opens upward.
  • the shape of the housing 20 is not limited to a cylindrical shape. Further, the cross section of the housing 20 may be, for example, a polygon. Further, the housing 20 may not be bottomed but may have a cylindrical shape without a bottom.
  • the bus bar holder 50 is a support member that supports the bus bar 51.
  • the bus bar holder 50 is made of a resin material.
  • the bus bar 51 is an example of a conductive member, and is connected to the coil wire 43 of the stator 40.
  • the bus bar 51 is connected to the connection terminal 70.
  • the connection terminal 70 extends upward in the axial direction and is connected to the control board 80.
  • the bus bar holder 50 may support the connection terminal 70.
  • the bus bar holder 50 has a portion that supports the inclined portion 732 of the connection terminal 70. According to this configuration, the bus bar holder 50 can receive a load generated when the connection terminal 70 is connected to the control board 80 or an external device. Therefore, the load applied to the connection portion between the bus bar 51 and the connection terminal 70 can be reduced.
  • the control board 80 is an ECU (engine control unit) board, for example, and is a board having a control circuit for controlling the operation of the automobile.
  • connection terminal 70 connected to the bus bar 51 is made of a conductive material. As shown in FIG. 2, the connection terminal 70 includes a first connection portion 71 connected to the bus bar 51, a second connection portion 72 connected to the control board 80, and between the first connection portion 71 and the second connection portion 72. Have a bent portion 73 and a straight portion 74.
  • the straight portion 74 extends in the axial direction.
  • the bent portion 73 is bent in the radial direction with respect to the straight portion 74.
  • the bent portion 73 has a first bent point 731 disposed at one end on the first connecting portion 71 side and a second bent point 739 disposed on the other end on the second connecting portion 72 side.
  • the bent portion 73 has inclined portions 732 and 734 having an angle with respect to the straight portion 74 between the first bent point 731 and the second bent point 739.
  • the bending portion 73 further has another bending point 733 between the first bending point 731 and the second bending point 739.
  • the connection terminal 70 expands in the axial direction by heat from the control board 80 and the bus bar 51 while the first connection portion 71 and the second connection portion 72 are fixed.
  • connection terminal 70 contracts in the axial direction by being cooled after thermal expansion, the contraction in the axial direction of the entire connection terminal 70 is suppressed by the extension of the bent portion 73.
  • the connection terminal 70 includes the first connection portion 71 connected to the bus bar 51 and the second connection portion 72 connected to the control board 80, and the first connection portion.
  • a bent portion 73 and a straight portion 74 are provided between 71 and the second connection portion 72.
  • the bent portion 73a of the connection terminal 70a has two other bent points 733 and 735 between the first bent point 731 and the second bent point 739. Have three inclined portions 732, 734, 736. Since the expansion of the connection terminal 70a in the axial direction is alleviated by the bent portion 73a, the stress of the control board 80 can be suppressed and the control board 80 can be prevented from being damaged.
  • the bent portion 73 b of the connection terminal 70 b is another linear portion 740 extending in a direction parallel to the straight portion 74 between the first bent point 731 and the other bent point 737. including.
  • an inclined portion 738 is provided between the other bending point 737 and the second bending point 739. Since the expansion of the connection terminal 70a in the axial direction is relieved by the bent portion 73b, the stress of the control board 80 can be suppressed and the control board 80 can be prevented from being damaged.
  • connection destination of the connection terminals 70, 70 a and 70 b is not limited to the control board 80.
  • an external power source (not shown) may be used.
  • connection terminals 70, 70a, 70b are not limited to being connected in the axial direction.
  • the connection terminals 70, 70a, 70b may be connected in the radial direction, for example.
  • the straight portion 74 extends in the radial direction of the motor 1, and the bent portions 73, 73 a, 73 b are bent in the axial direction with respect to the straight portion 74.
  • the motor 1 according to the above embodiment is not limited to the inner rotor type, but may be an outer rotor type in which the rotor is arranged outside the stator.
  • the electric power steering device 2 is mounted on the steering mechanism of the vehicle wheel 912.
  • the electric power steering device 2 is a column type power steering device that directly reduces the steering force by the power of the motor 1.
  • the electric power steering device 2 includes a motor 1, a steering shaft 914, and an axle 913.
  • the steering shaft 914 transmits the input from the steering 911 to the axle 913 having the wheels 912.
  • the power of the motor 1 is transmitted to the axle 913 via a ball screw.
  • the motor 1 employed in the column-type electric power steering device 2 is provided inside an engine room (not shown).
  • the electric power steering device 2 shown in FIG. 5 is a column type, but may be a rack type.
  • the electric power steering device 2 includes a motor 1. For this reason, the electric power steering apparatus 2 with the same effect as that of the above embodiment can be obtained.
  • the electric power steering apparatus 2 was mentioned here as an example of the usage method of the motor 1, the usage method of the motor 1 is not limited and can be used widely, such as a pump and a compressor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Steering Mechanism (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Le problème décrit par la présente invention est de pourvoir à un moteur configuré de façon à réduire la contrainte provoquée par une borne de connexion et apparaissant dans un composant auquel la borne de connexion est connectée. La solution de l'invention porte sur un moteur qui est pourvu : d'un arbre 31 s'étendant le long d'un axe central; d'un rotor 30 fixé à l'arbre 31; d'un stator 40 disposé radialement à l'extérieur ou à l'intérieur du rotor 30 et comprenant un fil de bobine 43; d'une barre omnibus 51 se connectant au fil de bobine 43; et d'une borne de connexion 70. La borne de connexion 70 comprend : une première section de connexion 71 se connectant à la barre omnibus 51; une seconde section de connexion 72 se connectant à une carte de commande 80; et une section courbée 73 et une section droite 74, qui sont situées entre la première section de connexion 71 et la seconde section de connexion 72.
PCT/JP2019/009432 2018-03-23 2019-03-08 Moteur et dispositif de direction assistée électrique Ceased WO2019181571A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980020373.6A CN111919365B (zh) 2018-03-23 2019-03-08 马达和电动助力转向装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018056225 2018-03-23
JP2018-056225 2018-03-23

Publications (1)

Publication Number Publication Date
WO2019181571A1 true WO2019181571A1 (fr) 2019-09-26

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ID=67986177

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/009432 Ceased WO2019181571A1 (fr) 2018-03-23 2019-03-08 Moteur et dispositif de direction assistée électrique

Country Status (2)

Country Link
CN (1) CN111919365B (fr)
WO (1) WO2019181571A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022102076A (ja) * 2020-12-25 2022-07-07 日本電産サンキョー株式会社 モータ、およびポンプ装置
JP2022117165A (ja) * 2021-01-29 2022-08-10 日本電産テクノモータ株式会社 ステータ、モータ、及び、ステータの製造方法
US12614942B2 (en) 2022-11-29 2026-04-28 Toyota Jidosha Kabushiki Kaisha Busbar reinforcement arrangement of motor unit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010030489A (ja) * 2008-07-30 2010-02-12 Hitachi Ltd 電動パワーステアリング用制御装置および電動パワーステアリング装置
JP2016178774A (ja) * 2015-03-19 2016-10-06 株式会社ジェイテクト 制御ユニット、およびモータユニット

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6135982B2 (ja) * 2013-01-17 2017-05-31 日本電産株式会社 モータ
JP6569306B2 (ja) * 2014-09-30 2019-09-04 日本電産株式会社 モータ
JP6578642B2 (ja) * 2014-09-30 2019-09-25 日本電産株式会社 モータ
JP6287784B2 (ja) * 2014-11-28 2018-03-07 日本電産株式会社 モータ
DE102015225088A1 (de) * 2014-12-26 2016-06-30 Nidec Corporation Motor und Verfahren zum Herstellen desselben
JP6589336B2 (ja) * 2015-03-30 2019-10-16 日本電産株式会社 モータおよび車載装置
JP6596884B2 (ja) * 2015-03-31 2019-10-30 日本電産株式会社 モータ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010030489A (ja) * 2008-07-30 2010-02-12 Hitachi Ltd 電動パワーステアリング用制御装置および電動パワーステアリング装置
JP2016178774A (ja) * 2015-03-19 2016-10-06 株式会社ジェイテクト 制御ユニット、およびモータユニット

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022102076A (ja) * 2020-12-25 2022-07-07 日本電産サンキョー株式会社 モータ、およびポンプ装置
JP7562404B2 (ja) 2020-12-25 2024-10-07 ニデックインスツルメンツ株式会社 モータ、およびポンプ装置
JP2022117165A (ja) * 2021-01-29 2022-08-10 日本電産テクノモータ株式会社 ステータ、モータ、及び、ステータの製造方法
JP7631634B2 (ja) 2021-01-29 2025-02-19 ニデックテクノモータ株式会社 ステータ、モータ、及び、ステータの製造方法
US12614942B2 (en) 2022-11-29 2026-04-28 Toyota Jidosha Kabushiki Kaisha Busbar reinforcement arrangement of motor unit

Also Published As

Publication number Publication date
CN111919365A (zh) 2020-11-10
CN111919365B (zh) 2023-05-30

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