WO2023095217A1

WO2023095217A1 - Motor device and motor control device

Info

Publication number: WO2023095217A1
Application number: PCT/JP2021/043038
Authority: WO
Inventors: 裕人佐藤
Original assignee: 株式会社ジェイテクト
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2023-06-01

Abstract

A motor device (11) is provided with a motor (12) and a motor control device (13). The motor control device (13) has a substrate (41) that is attached to an end of the motor (12) to control the motor (12). The motor (12) has a motor body (20) and a connector assembly (25) that is disposed on the lateral side of the motor body (20) when viewed from the axial direction of the motor body (20). The substrate (41) has an extension section (41B) that extends to the lateral side of the motor body (20) such that the extension section (41B) overlaps the connector assembly (25) when viewed from the axial direction of the motor body (20). The extension section (41B) has: terminal connection sections (53A, 54A, 53B, 54B) to which terminals (25D1, 25D2, 25E1, 25E2) to be held by the connector assembly (25) are connected; and an electric circuit configured to cause the motor body (20) to operate.

Description

Motor device and motor control device

The present invention relates to a motor device and a motor control device.

Conventionally, motor devices have been used as drive sources for various electric devices. The motor device operates with power supplied from the power supply. For example, a vehicle motor device has a power supply connector. The connector is connected to the vehicle's power supply via a harness. The direction in which the harness is pulled out from the motor device is determined by the mounting requirements of the motor device on the vehicle. It is necessary to change the direction of the connector according to the direction in which the harness is pulled out.

The motor device of Patent Document 1 has a motor, a board, and a connector. A substrate is provided at the end of the motor. The size of the substrate is set so that it fits inside the outline of the motor when viewed from the axial direction of the motor. A connector is provided on the opposite side of the motor from the substrate. The connector is positioned inside the contour of the motor when viewed in the axial direction of the motor. The connector extends axially of the motor. The terminals of the connector are connected to the substrate.

The motor device of Patent Document 2 has a motor, a board, and a connector. A substrate is provided at the end of the motor. The board has a portion that protrudes outside the outline of the motor when viewed in the axial direction of the motor. The connector is provided on the same side of the board overhang as the motor. The connector is positioned outside the contour of the motor when viewed in the axial direction of the motor. The connector extends axially of the motor. The terminals of the connector are connected to the overhanging portion of the substrate.

JP 2020-127334 A Japanese Patent Application Laid-Open No. 2020-4887

As in Patent Documents 1 and 2, when changing the orientation of the connector, it is necessary to greatly change the entire structure of the motor device including the board.

A motor device according to an aspect of the present disclosure includes a motor and a motor control device provided at an end of the motor. The motor controller has a board attached to the end of the motor for controlling the motor. The motor has a motor body and a connector assembly arranged on the side of the motor body when viewed from the axial direction of the motor body. The board has an overhanging portion that overhangs the connector assembly when viewed from the axial direction of the motor main body. The protruding portion has a terminal connection portion to which a terminal held by the connector assembly is connected, and an electric circuit configured to operate the motor body.

A motor control device according to an aspect of the present disclosure is included in the above motor device.

1 is a perspective view showing an appearance of a motor device according to a first embodiment; FIG. 2 is an exploded perspective view of the motor device of FIG. 1; FIG. 3 is a circuit diagram of the motor control device of FIG. 2; FIG. 3 is a plan view of the motor device of FIG. 2 with the cover and substrate removed; FIG. 3 is a plan view of the motor device of FIG. 2 with the cover removed; FIG. Figure 6 is a longitudinal sectional view of a first type of motor device of Figure 5; Figure 6 is a longitudinal sectional view of a second type of motor device of Figure 5; It is a top view of the state which removed the cover of the motor apparatus which concerns on 2nd Embodiment. FIG. 9 is a longitudinal sectional view of a first type of motor device of FIG. 8; FIG. 9 is a longitudinal sectional view of a second type of motor device of FIG. 8;

<First Embodiment>
A motor device 11 according to the first embodiment will be described.
<Overall composition>
As shown in FIG. 1 , the motor device 11 has a motor 12 and a motor control device 13 . Motor 12 is, for example, a three-phase brushless motor. The three phases are U phase, V phase and W phase. The motor 12 has two winding groups. A motor control device 13 is provided at the end of the motor 12 . The motor control device 13 independently controls power supply to the winding groups of the two systems.

<Motor>
As shown in FIG. 2, motor 12 has motor body 20 and connector assembly 25 .

The motor body 20 has a cylindrical case. The case is made of metal. A stator, a busbar module and a rotor are housed inside the case. The stator has a cylindrical core fitted to the inner peripheral surface of the case, and a plurality of windings wound around the core via insulators. The busbar module has a cylindrical holder and a plurality of busbars held by the holder. One end of the winding is connected to each bus bar. The rotor is inserted contactlessly into the stator and busbar modules. The rotor has an output shaft and a cylindrical magnet fixed to the outer peripheral surface of the output shaft. The output shaft is rotatably supported on the inner peripheral surface of the case via bearings. The motor body 20 has a first end from which the output shaft protrudes and a second end opposite to the first end.

A board housing portion 21 is provided at the end of the motor body 20 . In the present embodiment, the end of the motor main body 20 where the board accommodating portion 21 is provided is the second end. The board accommodating portion 21 is made of metal and provided integrally with the case of the motor body 20 . The substrate housing portion 21 is a rectangular box-shaped body having an opening 21A. The opening 21A opens in the direction opposite to the motor main body 20 . The substrate housing portion 21 has an overhang portion 21B. The protruding portion 21B is a portion of the substrate accommodating portion 21 that protrudes to the side of the motor main body 20 . The lateral direction is a direction orthogonal to the axial direction of the motor body 20 when viewed from the axial direction of the motor body 20 . The substrate accommodating portion 21 has a fitting hole 21C. 21 C of fitting holes are provided in the end wall of the overhang part 21B. The fitting hole 21C passes through the end wall of the projecting portion 21B in the axial direction of the motor 12. As shown in FIG.

A heat sink 22 is provided at the second end of the motor body 20 . The heat sink 22 is made of metal. The metal is a metal with excellent thermal conductivity, such as aluminum. The heat sink 22 is cylindrical. The heat sink 22 is coaxially positioned with respect to the axis of the motor 12 . The heat sink 22 extends through the end wall of the substrate housing portion 21 in the axial direction of the motor 12 . A portion of the heat sink 22 is exposed inside the board accommodating portion 21 .

The heat sink 22 is provided with three first motor terminals 23A. These first motor terminals 23A respectively correspond to the three-phase windings forming the first winding group. Each of the first motor terminals 23A is part of a busbar. Inside the motor body 20, one end of the first winding of each phase is connected to the corresponding phase bus bar. The first motor terminal 23A passes through the heat sink 22 in the axial direction of the motor body 20 via an insulating member. The three first motor terminals 23A are arranged in a line tangentially to the outline of the motor body 20 when viewed from the axial direction of the motor body 20 .

The heat sink 22 is provided with three second motor terminals 24A. These second motor terminals 24A respectively correspond to the three-phase windings forming the second winding group. Each of the second motor terminals 24A is part of a busbar. Inside the motor body 20, one end of the second winding of each phase is connected to the corresponding phase bus bar. The second motor terminal 24A passes through the heat sink 22 in the axial direction of the motor body 20 via an insulating member. The three second motor terminals 24A are arranged in a row tangentially to the outline of the motor body 20 when viewed from the axial direction of the motor body 20 .

The connector assembly 25 has a synthetic resin body 25A. The body 25A has a base 25B, a first connector fitting portion 25C1, and a second connector fitting portion 25C2. The base 25B is a rectangular box-shaped body that opens in the same direction as the opening 21A of the board housing portion 21. As shown in FIG. The base 25B has a first end face facing in the same direction as the opening 21A of the board housing portion 21 and a second end face opposite to the first end face. The first connector fitting portion 25C1 is provided on the second end surface of the base 25B. The first connector fitting portion 25C1 is a tubular body extending from the second end surface of the base 25B and opens in the direction in which the second end surface faces. A plug connector is fitted to the first connector fitting portion 25C1. A plug connector is provided at the first end of the wire. A second end of the wiring is connected to a DC power supply such as a battery provided outside the motor device 11 . The second connector fitting portion 25C2 has the same configuration as the first connector fitting portion 25C1. The first connector fitting portion 25C1 and the second connector fitting portion 25C2 are arranged at intervals in the long side direction of the base 25B.

The connector assembly 25 has a first power terminal 25D1 and a first ground terminal 25E1. The first power supply terminal 25D1 is provided along a path extending from the inside of the first connector fitting portion 25C1 and passing through the end wall of the base 25B. A first end of the first power terminal 25D1 is positioned inside the first connector fitting portion 25C1. A second end of the first power terminal 25D1 stands upright against the end wall of the base 25B. The first ground terminal 25E1 is provided basically in the same manner as the first power supply terminal 25D1. The first power terminal 25D1 and the first ground terminal 25E1 are arranged in the short side direction of the base 25B.

The connector assembly 25 has a second power terminal 25D2 and a second ground terminal 25E2. The second power supply terminal 25D2 is provided along a path extending from the inside of the second connector fitting portion 25C2 and passing through the end wall of the base 25B. A first end of the second power terminal 25D2 is positioned inside the second connector fitting portion 25C2. A second end of the second power terminal 25D2 stands upright against the end wall of the base 25B. The second ground terminal 25E2 is provided basically in the same manner as the second power supply terminal 25D2. The second power terminal 25D2 and the second ground terminal 25E2 are arranged in the short side direction of the base 25B.

The connector assembly 25 is attached to the board housing portion 21 of the motor 12 . The outer peripheral surface of the base 25B is fitted into the inner peripheral surface of the fitting hole 21C of the board accommodating portion 21 . The base 25B is inserted into the fitting hole 21C with the first connector fitting portion 25C1 and the second connector fitting portion 25C2 directed toward the opening portion 21A of the substrate accommodating portion 21 . A flange portion 25F is provided over the entire circumference of the outer peripheral surface of the base 25B. The flange portion 25F is kept in contact with the peripheral portion of the fitting hole 21C in the axial direction of the motor body 20. As shown in FIG. The first connector fitting portion 25C1 and the second connector fitting portion 25C2 protrude from the end wall of the substrate accommodating portion 21 in the direction opposite to the opening direction of the base 25B.

<Motor controller>
As shown in FIG. 2, motor controller 13 has a single substrate 41 and cover 42 .

The board 41 has a configuration for supplying electric power to the motor 12 . The contour shape of the outer circumference of the substrate 41 corresponds to the contour shape of the inner circumference of the substrate accommodating portion 21 when viewed from the axial direction of the motor 12 . The substrate 41 is housed inside the substrate housing portion 21 . The substrate 41 is overlaid on the heat sink 22 and the connector assembly 25 housed inside the substrate housing portion 21 . The substrate 41 is fixed to a support portion provided in the connector assembly 25 and a support portion provided inside the substrate housing portion 21 . The board 41 is maintained in a posture perpendicular to the axial direction of the motor body 20 .

The board 41 has a configuration for supplying electric power to the winding group of the first system of the motor 12 . The substrate 41 includes a first inverter circuit 51A, a first motor terminal connection portion 52A, a first power supply terminal connection portion 53A, a first ground terminal connection portion 54A, and a first filter 55A as a configuration of the first system. , and a first microcomputer 56A. The substrate 41 has a back surface facing the end wall of the substrate accommodating portion 21 in the axial direction of the motor body 20 and a surface opposite to the back surface.

The first inverter circuit 51A generates power to be supplied to the winding group of the first system of the motor 12 . The first inverter circuit 51A converts the DC power from the DC power supply into three-phase AC power. The first inverter circuit 51A is provided on the back surface of the substrate 41 . The first inverter circuit 51A has a plurality of FETs (Field Effect Transistors). FET is a heat generating element. Each FET is kept in contact with the heat sink 22 via heat dissipation grease.

The first motor terminal connection portions 52A are provided at positions corresponding to the three first motor terminals 23A. The first motor terminal connection portion 52A is a group of three-phase connection portions to which the three first motor terminals 23A are respectively connected. The three-phase connection parts forming a group are provided at positions corresponding to the three first motor terminals 23A when viewed from the axial direction of the motor main body 20 . The connecting portion includes, for example, a first through hole penetrating through the substrate 41 in its thickness direction. The thickness direction of the substrate 41 is also the axial direction of the motor body 20 . Each first motor terminal 23A is inserted into the corresponding first through hole from the axial direction of the motor main body 20 to be connected to the corresponding connection portion.

The first power terminal connection portion 53A is a portion to which the first power terminal 25D1 is connected. The first power terminal connection portion 53A is provided at a position corresponding to the upright second end portion of the first power terminal 25D1 when viewed from the axial direction of the motor body 20 . A second end of the first power terminal 25D1 is connected in the axial direction of the motor body 20 to the first power terminal connecting portion 53A. The first power terminal connection portion 53A includes, for example, a first hole penetrating through the substrate 41 in its thickness direction. The first power terminal 25D1 is inserted into the first hole of the board 41 from the axial direction of the motor main body 20 to be connected to the first power terminal connecting portion 53A.

The first ground terminal connection portion 54A is a portion to which the first ground terminal 25E1 is connected. The first ground terminal connection portion 54A is provided at a position corresponding to the upright second end portion of the first ground terminal 25E1 when viewed from the axial direction of the motor body 20 . A second end of the first ground terminal 25E1 is connected in the axial direction of the motor body 20 to the first ground terminal connection portion 54A. The first ground terminal connection portion 54A includes, for example, a second hole penetrating through the substrate 41 in its thickness direction. The first ground terminal 25E1 is inserted into the second hole of the substrate 41 from the axial direction of the motor main body 20, thereby being connected to the first ground terminal connecting portion 54A.

The first filter 55A is, for example, an LC filter made up of inductors and capacitors. A first filter 55A is provided on the surface of the substrate 41 . An inductor is a heating element consisting of a coil.

The first microcomputer 56A is a chip-type integrated circuit. The first microcomputer 56A controls power supply to the winding group of the first system of the motor 12 via the first inverter circuit 51A. The first microcomputer 56A is provided on the back surface of the substrate 41. As shown in FIG.

The board 41 has a configuration for supplying electric power to the winding group of the second system of the motor 12 . The substrate 41 includes a second inverter circuit 51B, a second motor terminal connection portion 52B, a second power supply terminal connection portion 53B, a second ground terminal connection portion 54B, and a second filter 55B as the configuration of the second system. , and a second microcomputer 56B.

The second inverter circuit 51B generates power to be supplied to the winding group of the second system of the motor 12 . The second inverter circuit 51B converts the DC power from the DC power supply into three-phase AC power. The second inverter circuit 51B is provided on the back surface of the substrate 41. As shown in FIG. The second inverter circuit 51B has a plurality of FETs. Each FET is kept in contact with the heat sink 22 via heat dissipation grease.

The second motor terminal connection portions 52B are provided at positions corresponding to the three second motor terminals 24A. The second motor terminal connection portion 52B is a group of three-phase connection portions to which the three second motor terminals 24A are respectively connected. The three-phase connection parts forming a group are provided at positions corresponding to the three second motor terminals 24A when viewed from the axial direction of the motor main body 20 . The connecting portion includes, for example, a second through hole penetrating through the substrate 41 in its thickness direction. Each second motor terminal 24A is inserted into the corresponding second through-hole from the axial direction of the motor main body 20 to be connected to the corresponding connection portion.

The second power terminal connection portion 53B is a portion to which the second power terminal 25D2 is connected. The second power terminal connecting portion 53B is provided at a position corresponding to the upright second end of the second power terminal 25D2 when viewed from the axial direction of the motor body 20. As shown in FIG. A second end of the second power terminal 25D2 is connected in the axial direction of the motor body 20 to the second power terminal connecting portion 53B. The second power terminal connection portion 53B includes, for example, a third hole penetrating through the substrate 41 in its thickness direction. The second power terminal 25D2 is inserted into the third hole of the substrate 41 from the axial direction of the motor main body 20, thereby being connected to the second power terminal connecting portion 53B.

The second ground terminal connection portion 54B is a portion to which the second ground terminal 25E2 is connected. The second ground terminal connection portion 54B is provided at a position corresponding to the upright second end portion of the second ground terminal 25E2 when viewed from the axial direction of the motor body 20 . A second end of the second ground terminal 25E2 is connected in the axial direction of the motor body 20 to the second ground terminal connection portion 54B. The second ground terminal connection portion 54B includes, for example, a fourth hole penetrating through the substrate 41 in its thickness direction. The second ground terminal 25E2 is inserted into the fourth hole of the substrate 41 from the axial direction of the motor main body 20, thereby being connected to the second ground terminal connecting portion 54B.

The second filter 55B is, for example, an LC filter made up of inductors and capacitors. A second filter 55B is provided on the surface of the substrate 41 .
The second microcomputer 56B is a chip type integrated circuit. The second microcomputer 56B controls power feeding to the winding group of the second system of the motor 12 via the second inverter circuit 51B. A second microcomputer 56B is provided on the back surface of the substrate 41 .

The cover 42 is made of synthetic resin. The cover 42 is a rectangular box-shaped body that opens toward the motor body 20 . The cover 42 is attached to the board accommodating portion 21 so as to cover the opening 21A of the board accommodating portion 21 while the board 41 is supported by the supporting portion of the connector assembly 25 and the supporting portion of the board accommodating portion 21 .

<Electrical Configuration of Motor Device>
Next, the electrical configuration of the motor device 11 will be described.
As shown in FIG. 3, the motor device 11 includes a first winding group 20A of the motor body 20, a first inverter circuit 51A, a first filter 55A, and a first microcomputer 56A as a configuration of the first system. have.

The first winding group 20A has a U-phase winding, a V-phase winding and a W-phase winding. The three-phase windings are connected together, for example by star connection. Each phase winding is connected to the first inverter circuit 51A via the first end connected to the other phase winding at the neutral point and the first motor terminal 23A of the corresponding phase. and a second end. The second end of each phase winding is connected to the midpoint of the corresponding phase leg of the first inverter circuit 51A.

The first inverter circuit 51A has three legs. Each leg has two FETs (Field Effect Transistors) 57A connected in series with each other. The three legs are connected in parallel with each other. The three legs are connected to the first power terminal connection portion 53A and the first ground terminal connection portion 54A via the first filter 55A. The first power terminal connection portion 53A is connected to the + terminal of the DC power supply, and the first ground terminal connection portion 54A is connected to the - terminal of the DC power supply.

The first filter 55A includes a coil provided in series with the power supply line and a capacitor connected to the power supply line and the ground line. The first filter 55A removes noise superimposed on the DC power supplied from the first power terminal connection portion 53A.

The first microcomputer 56A is a control circuit that controls the operation of the first inverter circuit 51A. The first microcomputer 56A generates a switching command for each FET 57A of the first inverter circuit 51A based on the rotation angle of the rotor detected through the rotation angle sensor provided on the substrate 41. FIG. Each FET 57A of the first inverter circuit 51A performs a switching operation based on a switching command, thereby converting the DC power supplied from the DC power supply into three-phase AC power. AC power generated by the first inverter circuit 51A is supplied to the first winding group 20A via the three-phase first motor terminals 23A.

The motor device 11 has a second winding group 20B of the motor body 20, a second inverter circuit 51B, a second filter 55B, and a second microcomputer 56B as a second system configuration.

The second winding group 20B has a U-phase winding, a V-phase winding and a W-phase winding. The three-phase windings are connected together, for example by star connection. Each phase winding has a first end connected to other windings at a neutral point, and a second end connected to a second inverter circuit 51B via a second motor terminal 24A of the corresponding phase. and an end. The second end of each phase winding is connected to the midpoint of the corresponding phase leg of the second inverter circuit 51B.

The second inverter circuit 51B has three legs. Each leg has two FETs 57B connected in series with each other. The three legs are connected in parallel with each other. The three legs are connected to the second power terminal connection portion 53B and the second ground terminal connection portion 54B via the second filter 55B. The second power terminal connection portion 53B is connected to the + terminal of the DC power supply, and the second ground terminal connection portion 54B is connected to the - terminal of the DC power supply.

The second filter 55B includes a coil provided in series with the power supply line and a capacitor connected to the power supply line and the ground line. The second filter 55B removes noise superimposed on the DC power supplied from the second power terminal connecting portion 53B.

The second microcomputer 56B is a control circuit that controls the operation of the second inverter circuit 51B. The second microcomputer 56B generates a switching command for each FET 57B of the second inverter circuit 51B based on the rotation angle of the rotor detected through the rotation angle sensor provided on the substrate 41. FIG. Each FET 57B of the second inverter circuit 51B performs a switching operation based on a switching command, thereby converting the DC power supplied from the DC power supply into three-phase AC power. The AC power generated by the second inverter circuit 51B is supplied to the second winding group 20B via the three-phase second motor terminals 24A.

<Positional relationship between the motor body and the board connection part of each terminal>
Next, with the connector assembly 25 attached to the substrate housing portion 21, the positional relationship between the motor main body 20 and the power terminal portion connected to the substrate 41, and the ground terminal connected to the motor main body 20 and the substrate 41 are examined. The positional relationship with the part of is explained.

As shown in FIG. 4, the upright second end of the first power supply terminal 25D1 is the first board connection part P11 connected to the first power supply terminal connection part 53A of the board 41. As shown in FIG. The upright second end portion of the second power terminal 25D2 is the second substrate connection portion P12 connected to the second power terminal connection portion 53B of the substrate 41 . A second upright end of the first ground terminal 25E1 is a third substrate connection portion P13 connected to the first ground terminal connection portion 54A of the substrate 41 . A second upright end of the second ground terminal 25E2 is a fourth substrate connection portion P14 connected to the second ground terminal connection portion 54B of the substrate 41 .

The first to fourth board connection portions P11 to P14 are provided so as to be as close to the motor body 20 as possible within a permissible range when viewed from the axial direction of the motor body 20. The first to fourth board connection portions P11 to P14 are closer to the motor main body 20 than other portions of the respective terminals (25D1, 25D2, 25E1, 25E2) when viewed from the axial direction of the motor main body 20.

The first board connecting portion P11 and the third board connecting portion P13 are provided so as to line up along the boundary line BL when viewed from the axial direction of the motor body 20 . Boundary line BL is a straight line that passes through axis O, which is the center of motor body 20 , and extends in the long side direction of substrate accommodating portion 21 when viewed from the axial direction of motor body 20 . The first board connecting portion P11 is closer to the motor body 20 than the third board connecting portion P13 when viewed from the axial direction of the motor body 20 .

The second board connection part P12 and the fourth board connection part P14 are provided so as to line up along the boundary line BL when viewed from the axial direction of the motor body 20 . The second board connection portion P12 is closer to the motor body 20 than the fourth board connection portion P14 when viewed from the axial direction of the motor body 20 . The first board connecting portion P11 and the second board connecting portion P12 are provided at line-symmetrical positions with respect to the boundary line BL. The third substrate connection portion P13 and the fourth substrate connection portion P14 are provided at line-symmetrical positions with respect to the boundary line BL.

<Board layout>
Next, the layout of the substrate 41 will be explained.
As shown in FIG. 5 , the substrate 41 has an overhanging portion 41B that overhangs the side of the motor body 20 when viewed from the axial direction of the motor body 20 . The lateral direction is a direction orthogonal to the axial direction of the motor body 20 when viewed from the axial direction of the motor body 20 . The protruding portion 41B protrudes outward from the motor body 20 in the radial direction of the motor body 20 . The projecting portion 41B overlaps the heat sink 22 and the connector assembly 25 when viewed from the axial direction of the motor body 20 .

The substrate 41 is divided into a power circuit area A1 and a control circuit area A2 when viewed from the axial direction of the motor body 20. The power circuit area A1 and the control circuit area A2 are arranged along the boundary line BL when viewed from the axial direction of the motor body 20 . The power circuit area A1 is an area that generally overlaps with the motor body 20 when viewed from the axial direction of the motor body 20 . The power circuit area A1 is also an area that does not overlap the connector assembly 25 when viewed from the axial direction of the motor main body 20 . The control circuit area A2 is an area that generally does not overlap the motor body 20 when viewed from the axial direction of the motor body 20 . The control circuit area A2 is also an area that overlaps the connector assembly 25 when viewed from the axial direction of the motor body 20 .

The power circuit area A1 has a power circuit. The power circuit is an electrical circuit for operating the motor body 20 and for supplying power to the motor body 20 . The power circuit has electronic components. The power circuit area A1 is further divided into a first power circuit area A11 and a second power circuit area A12 with a boundary line BL as a boundary.

The first power circuit area A11 has a power circuit for supplying power to the winding group of the first system. The power circuit includes a first inverter circuit 51A, a first motor terminal connection 52A, a first power terminal connection 53A, a first ground terminal connection 54A and a first filter 55A.

The first power terminal connection portion 53A and the first ground terminal connection portion 54A are arranged in a region radially outside the outer circumference of the motor body 20 when viewed from the axial direction of the motor body 20 . Also, the first power terminal connection portion 53A and the first ground terminal connection portion 54A are provided as close to the motor main body 20 as possible within an allowable range. The first power terminal connection portion 53A and the first ground terminal connection portion 54A are provided so as to line up along the boundary line BL when viewed from the axial direction of the motor body 20 . The first power terminal connection portion 53A is closer to the motor body 20 than the first ground terminal connection portion 54A when viewed from the axial direction of the motor body 20 .

The second power circuit area A12 has a power circuit for supplying power to the winding group of the second system. The power circuit includes a second inverter circuit 51B, a second motor terminal connection 52B, a second power terminal connection 53B, a second ground terminal connection 54B and a second filter 55B.

The second power terminal connection portion 53B and the second ground terminal connection portion 54B are arranged in a region radially outside the outer circumference of the motor body 20 when viewed from the axial direction of the motor body 20 . Also, the second power terminal connection portion 53B and the second ground terminal connection portion 54B are provided as close to the motor main body 20 as possible within an allowable range. The second power terminal connection portion 53B and the second ground terminal connection portion 54B are provided so as to line up along the boundary line BL when viewed from the axial direction of the motor body 20 . The second power terminal connection portion 53B is closer to the motor body 20 than the second ground terminal connection portion 54B when viewed from the axial direction of the motor body 20 .

The control circuit area A2 has a control circuit. The control circuit is an electric circuit for operating the motor body 20 and for controlling power supply to the motor body 20 . The control circuit has electronic components. The control circuit area A2 is further partitioned into a first control circuit area A21 and a second control circuit area A22 with a boundary line BL as a boundary.

The first control circuit area A21 has a control circuit for controlling power supply to the winding group of the first system. The control circuit includes a first microcomputer 56A. The first microcomputer 56A is positioned further radially outward than the first power terminal connection portion 53A and the first ground terminal connection portion 54A when viewed in the axial direction of the motor body 20 . In other words, the first microcomputer 56A is positioned on the opposite side of the motor body 20 from the first power terminal connection portion 53A and the first ground terminal connection portion 54A when viewed from the axial direction of the motor body 20. there is

The second control circuit area A22 has a control circuit for controlling power supply to the winding group of the second system. The control circuit includes a second microcomputer 56B. The second microcomputer 56B is located further radially outward than the second power terminal connection portion 53B and the second ground terminal connection portion 54B when viewed in the axial direction of the motor body 20 .

The components of the first system and the components of the second system are provided at symmetrical positions with respect to the boundary line BL.
<Type of motor device>
The motor device 11 has two types depending on the mounting direction of the connector assembly 25 .

As shown in FIG. 6, the first type is the motor device 11 in which the first connector fitting portion 25C1 and the second connector fitting portion 25C2 face the first direction W1. A first direction W<b>1 is a direction perpendicular to the substrate 41 and away from the rear surface of the substrate 41 in the axial direction of the motor body 20 . The first direction W1 is the direction from the second end of the motor body 20 toward the first end. The orientation of the first connector fitting portion 25C1 and the second connector fitting portion 25C2 is the direction in which they open. As indicated by an arrow Y1 in FIG. 6, heat generated by the electronic components in the power circuit area A1 is dissipated to the heat sink 22. As shown in FIG. 1 to 5 above show a motor device 11 of the first type.

As shown in FIG. 7, the second type is the motor device 11 in which the first connector fitting portion 25C1 and the second connector fitting portion 25C2 face the second direction W2. The second direction W2 is a direction perpendicular to the substrate 41 and away from the surface of the substrate 41 in the axial direction of the motor body 20 . The second direction W2 is the direction from the first end of the motor body 20 to the second end. The first connector fitting portion 25C1 and the second connector fitting portion 25C2 protrude outside the cover 42 through the end wall of the cover 42 . As indicated by an arrow Y1 in FIG. 7, heat generated by the electronic components in the power circuit area A1 is dissipated to the heat sink 22. As shown in FIG. In the second type motor device 11, the fitting hole 21C is preferably filled. This is to prevent liquid or dust from entering the substrate housing portion 21 . Also, in the second type motor device 11, the overhanging portion 21B may be a solid portion whose interior is filled.

<Effects of the first embodiment>
The first embodiment has the following effects.
(1-1) The substrate 41 has an overhanging portion 41B that overhangs the side of the motor body 20. As shown in FIG. The connector assembly 25 is arranged so as to overlap the projecting portion 41B when viewed from the axial direction of the motor body 20 . The projecting portion 41B has terminal connection portions (53A, 53B, 54A, 54B) to which the terminals (25D1, 25D2, 25E1, 25E2) held by the connector assembly 25 are connected. Therefore, it is possible to flexibly cope with the mounting direction of the connector assembly 25 which is changed according to the specifications. For example, two types in which the orientations (W1, W2) of the connector fitting portions (25C1, 25C2) are opposite to each other can be supported. Also, the projecting portion 41B has an electric circuit for operating the motor body 20 . Therefore, the substrate 41 can be effectively utilized.

(1-2) The power circuit area A1 is arranged so as to overlap the motor body 20 when viewed from the axial direction of the motor body 20 . Therefore, the heat generated by the electronic components in the power circuit area A1 is dissipated to the heat sink 22 regardless of the mounting direction of the connector assembly 25, which is changed according to the specifications. Therefore, two types in which the orientations (W1, W2) of the connector fitting portions (25C1, 25C2) are opposite to each other can be supported. Moreover, it is possible to share at least the substrate 41 and the connector assembly 25 between the first type and the second type. Therefore, the product cost of the motor device 11 can be reduced. There is no need to change the overall structure of the motor device 11 significantly.

(1-3) The first to fourth board connection portions P11 to P14 are provided so as to be as close to the motor body 20 as possible within a permissible range when viewed from the axial direction of the motor body 20. Therefore, the electronic components that generate heat in the power circuit area A1 can be easily arranged inside the outline of the motor body 20 when viewed from the axial direction of the motor body 20 . Further, it is possible to shorten the distance between the first to fourth substrate connection portions P11 to P14 and the power circuit. Therefore, it is possible to shorten the length of the wiring connecting the first to fourth substrate connection portions P11 to P14 and the power circuit.

(1-4) At least part of the electronic components that make up the control circuit are located outside the first power terminal connection portion 53A and the first ground terminal connection portion 54A when viewed from the axial direction of the motor body 20. are doing. Therefore, the substrate 41 can be used more effectively. The electronic components include a first microcomputer 56A and a second microcomputer 56B.

(1-5) Each terminal connection portion (53A, 53B, 54A, 54B) of the substrate 41 is connected to the substrate connection portion (P11 to P14) of each terminal (25D1, 25D2, 25E1, 25E2). direction is connected. That is, each terminal (25D1, 25D2, 25E1, 25E2) is connected to the corresponding terminal connection portion (53A, 53B, 54A, 54B) by being inserted into the hole of the substrate 41 extending in the axial direction of the motor body 20. be done. Since it is only necessary to attach the substrate 41 in the axial direction of the motor body 20, the substrate 41 and each terminal (25D1, 25D2, 25E1, 25E2) can be easily connected.

(1-6) The board 41 is provided in a posture perpendicular to the axial direction of the motor body 20 . The first connector fitting portion 25C1 and the second connector fitting portion 25C2 extend in a direction orthogonal to the substrate 41. As shown in FIG. Therefore, the wiring that connects the motor device 11 and the DC power supply can be pulled out from the motor device 11 in a direction perpendicular to the substrate.

(1-7) Each terminal connection portion (53A, 53B, 54A, 54B) of the substrate 41 is arranged in a region radially outside the outer circumference of the motor body 20. Therefore, the first connector fitting portion 25C1 and the second connector fitting portion 25C2 are provided in a direction orthogonal to the substrate 41 and away from the surface of the substrate 41 in the axial direction of the motor body 20. Even in such a case, each terminal (25D1, 25D2, 25E1, 25E2) of the connector assembly 25 can be formed in a relatively simple and short shape and connected to the board 41. FIG.

<Second Embodiment>
Next, a second embodiment will be described. This embodiment basically has the same configuration as the first embodiment shown in FIGS. The present embodiment differs from the first embodiment in that the power circuit area and the control circuit area are set in opposite positions. For this reason, the same reference numerals are given to the same members and configurations as in the first embodiment, and detailed description thereof will be omitted.

As shown in FIG. 8, the substrate 41 has an overhanging portion 41B that overhangs the side of the motor body 20 when viewed from the axial direction of the motor body 20. As shown in FIG. The substrate 41 is divided into a power circuit area A1 and a control circuit area A2 when viewed from the axial direction of the motor body 20. As shown in FIG. The power circuit area A1 and the control circuit area A2 are arranged along the boundary line BL when viewed from the axial direction of the motor body 20 . The power circuit area A1 is an area that generally does not overlap the motor body 20 when viewed from the axial direction of the motor body 20 . The power circuit area A1 has a first power circuit area A11 and a second power circuit area A12. The control circuit area A2 is an area that generally overlaps with the motor body 20 when viewed from the axial direction of the motor body 20 . The control circuit area A2 has a first control circuit area A21 and a second control circuit area A22.

The first power circuit area A11 has a first inverter circuit 51A, a first motor terminal connection portion 52A, a first power terminal connection portion 53A, a first ground terminal connection portion 54A and a first filter 55A. are doing. At least a portion of the first inverter circuit 51A and the first filter 55A are located further radially outward than the first power terminal connection portion 53A and the first ground terminal connection portion 54A when viewed from the axial direction of the motor body 20. positioned. In other words, at least a portion of the first inverter circuit 51A and the first filter 55A are arranged with respect to the first power terminal connection portion 53A and the first ground terminal connection portion 54A when viewed from the axial direction of the motor body 20. It is located on the opposite side of the body 20 .

The second power circuit area A12 has a second inverter circuit 51B, a second motor terminal connection portion 52B, a second power terminal connection portion 53B, a second ground terminal connection portion 54B and a second filter 55B. are doing. At least a portion of the second inverter circuit 51B and the second filter 55B are located further radially outward than the second power terminal connection portion 53B and the second ground terminal connection portion 54B when viewed from the axial direction of the motor body 20. positioned.

The first control circuit area A21 has a first microcomputer 56A. The second control circuit area A22 has a second microcomputer 56B.
As in the first embodiment, the motor device 11 has two types depending on the mounting direction of the connector assembly 25. FIG.

As shown in FIG. 9, in the first type, the first connector fitting portion 25C1 and the second connector fitting portion 25C2 face the first direction W1. In the first type, the connector assembly 25 exists on the heat dissipation path of the heat generated by the electronic components in the power circuit area A1. Therefore, the heat generated by the electronic components in the power circuit area A1 may not be radiated sufficiently. Therefore, in the first type, for example, a heat sink 61 is interposed between the projecting portion 41B of the substrate 41 and the end wall of the cover 42 . As indicated by an arrow Y1 in FIG. 9, heat generated by the electronic components in the power circuit area A1 is dissipated to the heat sink 61. As shown in FIG.

Note that in the first type, instead of using the heat sink 61, a metal cover 42 may be employed and the metal cover 42 may be brought into contact with the power circuit area A1 of the substrate 41. In this case, the heat generated by the electronic components in the power circuit area A1 is dissipated to the metallic cover 42 .

As shown in FIG. 10, in the second type, the projecting portion 21B is a solid portion whose interior is filled. In the second type, the first connector fitting portion 25C1 and the second connector fitting portion 25C2 face the second direction W2. As indicated by an arrow Y1 in FIG. 10, in the second type, heat generated by the electronic components in the power circuit area A1 is dissipated to the projecting portion 21B, which is a solid portion.

In the second type, instead of forming the projecting portion 21B as a solid portion, a separate heat sink is interposed between the power circuit area A1 of the substrate 41 and the end wall of the substrate accommodating portion 21. may In this case, the heat generated by the electronic components in the power circuit area A1 is dissipated to the heat sink and the end walls of the substrate accommodating portion 21. FIG.

<Effects of Second Embodiment>
The second embodiment has the following effects in addition to the effects described in columns (1-1), (1-5), (1-6), and (1-7) of the first embodiment. Play.

(2-1) The control circuit area A2 is arranged so as not to overlap the motor main body 20 when viewed from the axial direction of the motor main body 20 . In the first type, heat generated by the electronic components in the power circuit area A1 is dissipated to the heat sink 61 . In the second type, heat generated by the electronic components in the power circuit area A1 is dissipated to the projecting portion 21B, which is a solid portion. Therefore, it is possible to support two types of connector assembly 25 having different attachment directions. Also, at least the substrate 41 and the connector assembly 25 can be shared between the first type and the second type. Therefore, the product cost of the motor device 11 can be reduced. There is no need to change the overall structure of the motor device 11 significantly.

(2-2) The first to fourth board connection portions P11 to P14 are provided in the power circuit area A1 located outside the motor body 20 when viewed from the axial direction of the motor body 20. Therefore, it becomes easier to arrange the electronic components that generate heat in the power circuit area A1 outside the outline of the motor body 20 when viewed from the axial direction of the motor body 20 . Further, it is possible to shorten the distance between the first to fourth substrate connection portions P11 to P14 and the power circuit. Therefore, it is possible to shorten the length of the wiring pattern that connects the first to fourth substrate connection portions P11 to P14 and the power circuit.

(2-3) At least a portion of the electronic components that make up the power circuit are located further radially outward than the first power terminal connection portion 53A and the first ground terminal connection portion 54A when viewed from the axial direction of the motor body 20. positioned. Therefore, the substrate 41 can be effectively utilized. The electronic components include a first inverter circuit 51A, a second inverter circuit 51B, a first filter 55A and a second filter 55B.

<Other embodiments>
The first and second embodiments may be modified and implemented as follows.
- The motor 12 may have only one winding group. In this case, the substrate 41 may have a configuration for supplying power to only one winding group.

· The motor device 11 may be used, for example, as a drive source for an electric power steering device. In this case, the motor 12 functions as an assist motor that generates a steering assist force. A motor control device 13 controls a motor 12 as an assist motor.

· The motor device 11 may be used as a drive source for a reaction mechanism or steering mechanism in a steer-by-wire steering system. In this case, the motor 12 functions as a reaction force motor that generates a steering reaction force, or as a steering motor that generates a steering force for turning the steered wheels of the vehicle. The motor control device 13 controls the motor 12 as a reaction force motor or steering motor.

· The application of the motor device 11 is not limited to the in-vehicle device. The motor device 11 may be applied as a drive source for a machine tool such as a machining center or a robot.

Claims

A motor device comprising a motor and a motor control device provided at an end of the motor,
the motor controller having a board attached to an end of the motor for controlling the motor;
The motor has a motor body and a connector assembly arranged on the side of the motor body when viewed from the axial direction of the motor body,
the board has a protruding portion that protrudes laterally from the motor body so as to overlap the connector assembly when viewed from the axial direction of the motor body;
The projecting portion has a terminal connection portion to which a terminal held by the connector assembly is connected, and an electric circuit configured to operate the motor body.
The motor device according to claim 1, wherein the protruding portion has a region where a part of the electric circuit is provided outside the terminal connection portion when viewed from the axial direction of the motor body.
the terminal connection portion includes a hole in the board extending in the axial direction of the motor body,
3. The motor device according to claim 1, wherein the terminal is connected to the terminal connecting portion by being inserted into the hole from the axial direction of the motor body.
The connector assembly has a connector fitting part that encloses a part of the terminal,
4. Any one of claims 1 to 3, wherein the substrate is provided in a posture orthogonal to the axial direction of the motor body, and the connector fitting portion extends in a direction orthogonal to the substrate. 1. The motor device according to claim 1.
a power circuit area configured to convert power supplied to the terminals from an external power source into power supplied to the motor body;
a control circuit region configured to control power supply to the motor body;
When viewed from the axial direction of the motor body, the power circuit area is provided so as to overlap the motor body, and the control circuit area is provided so as not to overlap the motor body. The motor device according to any one of .
a power circuit area configured to convert power supplied to the terminals from an external power source into power supplied to the motor body;
a control circuit region configured to control power supply to the motor body;
When viewed from the axial direction of the motor body, the control circuit area is provided so as to overlap the motor body, and the power circuit area is provided so as not to overlap the motor body. The motor device according to any one of .
The terminal connection portion includes a power terminal connection portion to which power is supplied through the terminal,
7. The motor device according to claim 5, wherein the power terminal connecting portion is provided so as to be close to the motor body when viewed from the axial direction of the motor body.
The motor device according to any one of claims 5 to 7, wherein the terminal connecting portion is arranged in a region radially outside the outer circumference of the motor body.
A motor control device provided in the motor device according to any one of claims 1 to 8.