WO2023095218A1 - モータ装置およびモータ制御装置 - Google Patents
モータ装置およびモータ制御装置 Download PDFInfo
- Publication number
- WO2023095218A1 WO2023095218A1 PCT/JP2021/043039 JP2021043039W WO2023095218A1 WO 2023095218 A1 WO2023095218 A1 WO 2023095218A1 JP 2021043039 W JP2021043039 W JP 2021043039W WO 2023095218 A1 WO2023095218 A1 WO 2023095218A1
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- WIPO (PCT)
- Prior art keywords
- motor
- substrate
- cover
- power
- terminal
- Prior art date
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- 238000005192 partition Methods 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000004804 winding Methods 0.000 description 42
- 230000002093 peripheral effect Effects 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
Definitions
- the present disclosure relates to a motor device and a motor control device.
- the motor device of Patent Document 1 has a motor and an ECU (electronic control unit).
- the ECU is provided at the end of the motor.
- An ECU has a board, a cover and a connector.
- the board is fixed to the end of the motor.
- the cover is a cylindrical body that opens toward the motor.
- a cover is attached to the end of the motor to cover the substrate.
- the connector has a base portion and a connector portion.
- the base is fixed to the end of the motor while covered by the cover.
- the base portion is maintained in contact with the inner surface of the end wall of the cover in the axial direction of the motor.
- the connector portion penetrates the end wall of the cover in the axial direction of the motor and protrudes to the outside.
- the connector section has a power terminal. A power terminal is connected to the substrate.
- the motor device of Patent Document 2 has a motor and a control device.
- the controller is attached to the side of the motor.
- the controller has a housing, a metal board, a high current board, a control board and a cover.
- the housing is box-shaped and opens on the side opposite to the motor.
- the metal substrate is a power substrate and has large current components such as semiconductor switching elements and capacitors.
- the large-current board has a plurality of conductive plates forming pattern wiring and an insulating resin member into which these conductive plates are inserted.
- the control board has a microcomputer.
- the metal board, high current board and control board are housed in the housing in this order.
- the cover is attached to the housing so as to close the opening of the housing.
- Patent Documents 1 and 2 are used, for example, as drive sources for electric power steering devices.
- External force may be applied to the cover of the motor device.
- the external force is, for example, a force in a direction that intersects the end wall of the cover.
- the cover may be crushed, and the deformed portion of the cover may interfere with the board, which may electrically damage the board of the motor device and other electronic components on the vehicle. .
- a motor device includes a motor and a motor control device provided at an end of the motor.
- the motor control device has a substrate attached to an end of the motor for controlling the motor, and a flexible cover attached to an end of the motor to cover the substrate.
- 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 motor main body so as to overlap the connector assembly when viewed in the axial direction of the motor main body.
- the overhang has a terminal interface located between the end wall of the cover and the connector assembly.
- a terminal held by the connector assembly is connected to the terminal connecting portion in a state in which the projecting portion penetrates from the connector assembly toward the cover.
- the cover has an insulating first projection projecting from the inner surface of the end wall toward the substrate.
- the first projecting portion is configured to be adjacent to the terminal connection portion before the terminal contacts the end wall of the cover when the end wall of the cover receives an external force and bends toward the substrate. It is configured to contact a region of the substrate.
- a motor control device is included in the above motor device.
- FIG. 1 is a perspective view showing an appearance of a motor device according to an embodiment
- FIG. 2 is an exploded perspective view of the motor device of FIG. 1
- FIG. 3 is a perspective view of the connector assembly of FIG. 2
- FIG. Figure 3 is a perspective view of the cover of Figure 2
- FIG. 3 is a schematic diagram of the first restricting portion of the cover of FIG. 2 as seen from the axial direction of the motor body
- FIG. 3 is a cross-sectional view showing a main part of the motor device of FIG. 2
- 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 removed
- FIG. FIG. 3 is a cross-sectional view showing a main part of the motor device of FIG. 2
- FIG. 3 is a cross-sectional view showing a main part of the motor device of FIG. 2
- Fig. 3 is a perspective view of the motor device of Fig. 2 with the cover removed;
- 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 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 .
- 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
- 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 such as aluminum that has excellent electrical and thermal conductivity.
- 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 face 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.
- 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.
- the upright second end of the first power terminal 25D1 is the first connection P11 electrically connected to the motor controller 13.
- a second upright end of the second power terminal 25D2 is a second connection P12 electrically connected to the motor controller 13 .
- a second upright end of the first ground terminal 25 E 1 is a third connection P 13 electrically connected to the motor controller 13 .
- a second upright end of the second ground terminal 25E2 is a fourth connection P14 electrically connected to the motor controller 13 .
- the first to fourth 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 connection portions P11 to P14 are longer than other portions of the respective terminals (25D1, 25D2, 25E1, 25E2) among the two long side walls of the base 25B. It is adjacent to the long side wall near the motor body 20 .
- the first to fourth connection portions P11 to P14 are positioned corresponding to the center of the long side wall near the motor body 20 when viewed from the axial direction of the motor body 20. As shown in FIG.
- the first connection portion P11 and the third connection portion P13 are arranged in the short side direction X2 of the base 25B when viewed from the axial direction of the motor body 20.
- the first connection portion P11 is closer to the motor body 20 than the third connection portion P13 when viewed from the axial direction of the motor body 20 .
- the second connection portion P ⁇ b>12 and the fourth connection portion P ⁇ b>14 are arranged in the short side direction X ⁇ b>2 of the base 25 when viewed from the axial direction of the motor body 20 .
- the second connection portion P12 is closer to the motor body 20 than the fourth connection portion P14 when viewed from the axial direction of the motor body 20 .
- the first connection portion P ⁇ b>11 and the second connection portion P ⁇ b>12 are arranged in the long side direction X ⁇ b>1 of the base 25 when viewed from the axial direction of the motor body 20 .
- the third connection portion P ⁇ b>13 and the fourth connection portion P ⁇ b>14 are arranged in the long side direction X ⁇ b>1 of the base 25 when viewed from the axial direction of the motor body 20 .
- the connector assembly 25 has a second protrusion 25G.
- the second protruding portion 25G is a flat wall provided on the long side wall closer to the motor main body 20 out of the two long side walls of the base 25B.
- the second projecting portion 25G is located further outside in the short side direction with respect to the outer surface of the long side wall. That is, the second projecting portion 25G protrudes outward from the outer peripheral surface of the base 25B.
- the second protrusion 25G is located in the center of the long side wall and extends along the long side wall.
- a base end portion of the second projecting portion 25G is connected to the long side wall.
- the tip of the second projecting portion 25G protrudes from the opening end face of the base 25B in the direction opposite to the projecting direction of the first connector fitting portion 25C1 and the second connector fitting portion 25C2.
- 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 .
- the cover 42 has a first projecting portion 42A.
- the first protrusion 42A is provided on the inner surface of the end wall of the cover 42 .
- the first projecting portion 42A has a peripheral wall having a rectangular cross-sectional shape and opens in the opposite direction to the end wall of the cover 42 .
- the protrusion height of the first protrusion 42A with reference to the inner surface of the end wall of the cover 42 is higher than the protrusion length of each terminal (25D1, 25D2, 25E1, 25E2) with the surface of the substrate 41 as a reference.
- the first projecting portion 42A includes a first power terminal connection portion 53A, a first ground terminal connection portion 54A, a second power terminal connection portion 53B, and a second ground terminal connection when viewed from the axial direction of the motor body 20. It is provided so as to overlap the region of the substrate 41 where the portion 54B is provided.
- the first protrusion 42A has a first long side wall 42A1, a second long side wall 42A2, a first short side wall 42A3 and a second short side wall 42A4.
- the first long side wall 42A1 and the second long side wall 42A2 are opposed to each other in the long side direction Y1 of the cover 42 when viewed from the axial direction of the motor body 20 .
- the first short side wall 42A3 and the second short side wall 42A4 are opposed to each other in the short side direction Y2 of the cover 42 when viewed from the axial direction of the motor body 20 .
- first partition wall 42A5 As shown in FIG. 5, when viewed from the axial direction of the motor body 20, the interior of the first protrusion 42A is partitioned into four chambers by a first partition wall 42A5 and a second partition wall 42A6. .
- the first partition wall 42A5 and the second partition wall 42A6 are orthogonal to each other.
- the first partition wall 42A5 is parallel to the first long side wall 42A1 and the second long side wall 42A2.
- the second partition wall 42A6 is parallel to the first short side wall 42A3 and the second short side wall 42A4.
- the first protrusion 42A has a first chamber PR1, a second chamber PR2, a third chamber PR3 and a fourth chamber PR4.
- the first chamber PR1 corresponds to the first power terminal connecting portion 53A and the first connecting portion P11, which is the upright end of the first power terminal 25D1.
- the second chamber PR2 corresponds to the first ground terminal connection portion 54A and the third connection portion P13, which is the upright end portion of the first ground terminal 25E1.
- the third chamber PR3 corresponds to the second power terminal connecting portion 53B and the second connecting portion P12, which is the upright end portion of the second power terminal 25D2, when viewed from the axial direction of the motor body 20.
- the fourth chamber PR4 corresponds to the second ground terminal connection portion 54B and the fourth connection portion P14, which is the upright end portion of the second ground terminal 25E2, when viewed from the axial direction of the motor body 20.
- ⁇ Assembled state of the motor device> As shown in FIG. 6, when the motor device 11 is assembled, the base end portion of the second projecting portion 25G in the connector assembly 25 is positioned against the step surface 22A provided on the peripheral portion of the heat sink 22. It is kept in contact with the main body 20 in the axial direction.
- the step surface 22 ⁇ /b>A may be a plane perpendicular to the axial direction of the motor body 20 .
- the tip of the second protrusion 25 ⁇ /b>G in the connector assembly 25 is held at a position closer to the substrate 41 than the end surface of the heat sink 22 .
- the second projecting portion 25G supports the substrate 41 in cooperation with other supporting portions.
- the tip of the second projecting portion 25G is kept in contact with the back surface of the substrate 41 .
- the back surface of the substrate 41 is kept separated from the end surface of the heat sink 22 .
- a gap is formed between the back surface of the substrate 41 and the end surface of the heat sink 22 .
- the tip of the first projecting portion 42A of the cover 42 is kept separated from the surface of the substrate 41.
- a gap is formed between the tip surface of the first projecting portion 42A and the surface of the substrate 41 .
- the first connection portion P11 which is the end portion of the first power supply terminal 25D1
- the third connection portion P13 which is the end portion of the first ground terminal 25E1
- the tip of the first connecting portion P11 is inserted into the first chamber PR1 of the first projecting portion 42A.
- the first connecting portion P11 is kept out of contact with the inner wall surface of the first chamber PR1.
- the tip of the third connecting portion P13 is inserted into the third chamber PR3 of the first projecting portion 42A.
- the third connecting portion P13 is kept out of contact with the inner wall surface of the third chamber PR3.
- the second connection portion P12 that is the end portion of the second power supply terminal 25D2 and the fourth connection portion that is the end portion of the second ground terminal 25E2 are shown.
- P14 penetrates the substrate 41 in the axial direction of the motor body 20. As shown in FIG. The tip of the second connecting portion P12 is inserted into the second chamber PR2 of the first projecting portion 42A. The second connecting portion P12 is kept out of contact with the inner wall surface of the second chamber PR2. The tip of the fourth connecting portion P14 is inserted into the fourth chamber PR4 of the first projecting portion 42A. The fourth connecting portion P14 is kept out of contact with the inner wall surface of the fourth chamber PR4.
- the motor device 11 includes a first winding group 20A of the motor main 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.
- FETs Field Effect Transistors
- 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.
- 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.
- 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.
- the board 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 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 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 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 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 .
- 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.
- 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.
- the substrate 41 has a first power path R1 and a second power path R2.
- the first power path R ⁇ b>1 and the second power path R ⁇ b>2 are formed by pattern wiring on the substrate 41 .
- the first power path R1 is a power path for transmitting power supplied from the first power terminal connection portion 53A to the electronic components in the first power circuit area A11.
- the first power path R1 When viewed from the axial direction of the motor body 20, the first power path R1 has a portion extending along the boundary line BL with the first power terminal connection portion 53A as a starting point.
- the second power path R2 is a power path for transmitting power supplied from the second power terminal connection portion 53B to the electronic components in the second power circuit area A12.
- the second power path R2 has a portion extending along the boundary line BL from the second power terminal connecting portion 53B as viewed from the axial direction of the motor body 20 .
- the first projecting portion 42A of the cover 42 and the second projecting portion 25G of the connector assembly 25 are located on the boundary line BL when viewed from the axial direction of the motor body 20. Also, the first projecting portion 42A and the second projecting portion 25G are arranged along the boundary line BL when viewed from the axial direction of the motor body 20 .
- the first projecting portion 42A is positioned so as to intersect the first power path R1 and the second power path R2 when viewed from the axial direction of the motor body 20.
- the second projecting portion 25G is closer to the motor body 20 than the first projecting portion 42A when viewed from the axial direction of the motor body 20 .
- the second projecting portion 25G is located between the first projecting portion 42A and the motor body 20 when viewed from the axial direction of the motor body 20. As shown in FIG. The second projecting portion 25G intersects the first power path R1 and the second power path R2 when viewed from the axial direction of the motor body 20. As shown in FIG.
- the present embodiment has the following actions and effects.
- the motor device 11 is mounted on a vehicle, for example. In this case, a portion of the vehicle may interfere with the motor device 11 when the vehicle collides with some object.
- the motor device 11 is installed in the engine room of the vehicle, the engine or transmission may interfere with the motor device 11 .
- the motor device 11 is provided in the steering column, parts provided inside the dashboard may interfere with the motor device 11 .
- the cover 42 is subjected to an external force F1.
- the external force F1 is, for example, a force in a direction crossing the end wall of the cover 42 .
- the end walls of the cover 42 may be crushed and deformed.
- the end wall of the cover 42 is elastically deformed so as to approach the substrate 41 according to the magnitude of the external force F1. As the end wall of the cover 42 deforms, at least a portion of the tip of the first projecting portion 42A abuts on the surface of the substrate 41 .
- At least a portion of the distal end of the first projecting portion 42A extends to each terminal connection portion (53A, 54A, 53B, 54B) before each terminal (25D1, 25D2, 25E1, 25E2) contacts the end wall of the cover 42. contact the area of the substrate 41 adjacent to the . This is because the protrusion height of the first protrusion 42A with respect to the inner surface of the end wall of the cover 42 is greater than the protrusion length of each terminal (25D1, 25D2, 25E1, 25E2) with respect to the surface of the substrate 41. because it is expensive. In the example of FIG.
- the first protrusion 42A is slightly inclined counterclockwise with respect to the surface of the substrate 41, and the tip of the first long side wall 42A1 is in contact with the surface of the substrate 41.
- the entire tip surface of the first projecting portion 42A may contact the surface of the substrate 41 in some cases.
- the tip of the first projecting portion 42A abuts on the surface of the substrate 41, thereby restricting elastic deformation of the end wall of the cover 42 toward the surface of the substrate 41. Therefore, the tip of the first connection portion P11, which is the upright end of the first power supply terminal 25D1, and the tip of the third connection portion P13, which is the upright end of the first ground terminal 25E1, are covered by the cover 42. is suppressed from breaking through the end wall of the This prevents the first power terminal 25D1 from coming into contact with the vehicle component 100. As shown in FIG. The occurrence of a short circuit between the first power terminal 25D1 and the vehicle component 100 is also suppressed.
- the tip of the first projecting portion 42A abuts on the surface of the substrate 41, so that the tip of the second connection portion P12, which is the upright end of the second power supply terminal 25D2, is lowered.
- the tip portion of the fourth connection portion P14 which is the upright end portion of the second ground terminal 25E2 breaking through the end wall of the cover 42 is also suppressed. This prevents the second power terminal 25D2 from coming into contact with the component 100 of the vehicle. The occurrence of a short circuit between the second power terminal 25D2 and the vehicle component 100 is also suppressed.
- the shear forces are two forces that are parallel to the cross section along the thickness direction of the substrate 41 and that are directed in opposite directions.
- the shearing force consists of a first force with which at least a part of the tip of the first protrusion 42A presses the substrate 41 in a direction away from the end wall of the cover 42, and a second protrusion 25G that supports the substrate 41. and a second force experienced by substrate 41 as a reaction from .
- the second force is a force opposite to the first force.
- Shear stress occurs in the area between the portion of the substrate 41 with which the tip of the first projecting portion 42A abuts and the portion of the substrate 41 with which the tip of the second projecting portion 25G of the connector assembly 25 abuts.
- the shear stress is two internal forces that are parallel to the cross section along the thickness direction of the substrate 41 and that are directed in opposite directions.
- the shear stress exceeds the shear strength of the substrate 41, the portion of the substrate 41 with which the tip of the first projecting portion 42A abuts and the portion of the substrate 41 with which the tip of the second projecting portion 25G of the connector assembly 25 abuts.
- the area between the parts is partially sheared.
- the sheared portion 41C of the substrate 41 extends linearly in the short side direction of the substrate 41 .
- the shear portion 41C extends across the first power path R1 and the second power path R2.
- the first power path R1 and the second power path R2 are cut. Therefore, the power supply from the first power terminal connection portion 53A to the first power circuit area A11 and the power supply from the second power terminal connection part 53B to the second power circuit area A12 are interrupted. Therefore, even if electronic components on substrate 41, especially electronic components in power circuit area A1, are damaged due to interference with cover 42, occurrence of a short circuit due to the damaged electronic components is suppressed.
- the second connection P12 which is the upright end of the second power terminal 25D2
- the fourth connection P14 which is the upright end of the second ground terminal 25E2
- the first connection P11 and the third connection P11 There is a possibility that it will be displaced similarly to the connection part P13. At this time, it is conceivable that the first to fourth connecting portions P11 to P14 are deformed or displaced in an unexpected direction.
- first to fourth connection portions P11 to P14 are shielded from each other by the first partition wall 42A5 or the second partition wall 42A6.
- a first partition wall 42A5 is interposed between the first connection portion P11 and the third connection portion P13. Therefore, the first connection portion P11 and the third connection portion P13 do not come into contact with each other. Therefore, occurrence of a short circuit between the first power supply terminal 25D1 and the first ground terminal 25E1 is suppressed.
- a first partition wall 42A5 is also interposed between the second connection portion P12 and the fourth connection portion P14. Therefore, the second connection portion P12 and the fourth connection portion P14 do not come into contact with each other. Therefore, occurrence of a short circuit between the second power supply terminal 25D2 and the second ground terminal 25E2 is suppressed.
- This embodiment may be modified as follows.
- the cover 42 may have a greater thickness than other portions in the region corresponding to the first projecting portion 42A. In this way, when the first to fourth connection parts P11 to P14 are displaced so as to protrude further from the surface of the substrate 41, the first to fourth connection parts P11 to P14 push against the end walls of the cover 42. Penetration becomes more difficult.
- the cover 42 may be made of metal. Depending on the thickness of the cover 42 , the end wall of the cover 42 is deformed in a direction approaching the substrate 41 by the external force F ⁇ b>1 . In the cover 42, at least the areas where the first to fourth connection parts P11 to P14 may come into contact with the cover, that is, the first projecting part 42A and the area inside thereof, should have insulating properties. .
- the tip of the second projecting portion 25G does not need to be in contact with the back surface of the substrate 41 .
- the second protruding portion 25 ⁇ /b>G may protrude to a position closer to the substrate 41 than the end surface of the heat sink 22 in the axial direction of the motor body 20 .
- the end wall of the cover 42 bends toward the substrate 41, at least a portion of the substrate 41 is supported by the second projecting portion 25G so as to be separated from the end surface of the heat sink 22. As shown in FIG.
- the motor 12 may have only one winding group.
- the substrate 41 may have a configuration for supplying power to only one winding group.
- the first protruding portion 41A may have two chambers for accommodating the power terminals and the ground terminals for one system.
- the positions of the first connection portion P11, which is the upright end portion of the first power supply terminal 25D1, and the third connection portion P13, which is the upright end portion of the first ground terminal 25E1, may be reversed.
- a second partition wall 42A6 is interposed between the third connection portion P13 and the second connection portion P12 and between the first connection portion P11 and the fourth connection portion P14.
- the third connection portion P13 and the second connection portion P12 do not come into contact with each other.
- the first connection portion P11 and the fourth connection portion P14 do not contact each other.
- the positions of the second connection portion P12, which is the upright end portion of the second power supply terminal 25D2, and the fourth connection portion P14, which is the upright end portion of the second ground terminal 25E2 may be reversed.
- the first projecting portion 42A contacts the surface of the substrate 41 so as to surround the entire periphery of the first to fourth connection portions P11 to P14. It is sufficient if it has a surrounding wall.
- a configuration in which the first partition wall 42A5 and the second partition wall 42A6 are omitted may be employed as the first projecting portion 42A.
- the first protrusion 42A has a peripheral wall including four side walls (42A1, 42A2, 42A3, 42A4).
- the first projecting portion 42A covers the surface of the substrate 41 so as to block part of the periphery of the first to fourth connection portions P11 to P14. It is only necessary to have a wall in contact with the For example, a configuration having at least the first long side wall 42A1 of the first long side wall 42A1 and the second long side wall 42A2 may be employed as the first projecting portion 42A. Also, a configuration having at least one of the first short side wall 42A3 and the second short side wall 42A4 may be employed as the first projecting portion 42A.
- first short side wall 42A3 and the second short side wall 42A4 are omitted as the first projecting portion 42A. Even in this way, at least a portion of the tip portion of the first projecting portion 42A is not connected to each terminal connection portion (53A, 53A, 25E2) before each terminal (25D1, 25D2, 25E1, 25E2) contacts the end wall of the cover 42. 54A, 53B, 54B).
- the motor device 11 may be used, for example, as a drive source for an electric power steering device.
- 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.
- 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 motor device 11 is not limited to vehicle applications. It is suitable as a drive source for an electric device that may apply an external force to the cover 42 for some reason.
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Abstract
Description
第1の実施の形態に係るモータ装置11を説明する。
<全体構成>
図1に示すように、モータ装置11は、モータ12およびモータ制御装置13を有している。モータ12は、たとえば三相のブラシレスモータである。三相は、U相、V相およびW相である。モータ12は、2系統の巻線群を有している。モータ制御装置13は、モータ12の端部に設けられている。モータ制御装置13は、2系統の巻線群に対する給電を独立して制御する。
図2に示すように、モータ12は、モータ本体20およびコネクタ組立体25を有している。
図2に示すように、モータ制御装置13は、単一の基板41およびカバー42を有している。
第2のマイクロコンピュータ56Bは、チップ型の集積回路である。第2のマイクロコンピュータ56Bは、第2のインバータ回路51Bを介してモータ12の第2系統の巻線群に対する給電を制御する。第2のマイクロコンピュータ56Bは、基板41の裏面に設けられている。
図6に示すように、モータ装置11を組み立てた状態において、コネクタ組立体25における第2の突出部25Gの基端部は、ヒートシンク22の周縁部に設けられた段差面22Aに対して、モータ本体20の軸方向に当接した状態に維持される。段差面22Aは、モータ本体20の軸方向に対して直交する平面であってもよい。モータ装置11を組み立てた状態において、コネクタ組立体25における第2の突出部25Gの先端部は、ヒートシンク22の端面よりも基板41に近い位置に保持される。第2の突出部25Gは、他の支持部と協同して、基板41を支持する。第2の突出部25Gの先端部は、基板41の裏面に接触した状態に維持される。基板41の裏面は、ヒートシンク22の端面に対して離隔した状態に維持される。基板41の裏面とヒートシンク22の端面との間には、隙間が形成されている。
つぎに、モータ装置11の電気的な構成を説明する。
図7に示すように、モータ装置11は、第1系統の構成として、モータ本体20の第1の巻線群20A、第1のインバータ回路51A、第1のフィルタ55Aおよび第1のマイクロコンピュータ56Aを有している。
つぎに、基板41のレイアウトを説明する。
図8に示すように、基板41は、モータ本体20の軸方向からみて、モータ本体20の側方へ張り出す張り出し部41Bを有している。側方は、モータ本体20の軸方向からみて、モータ本体20の軸方向に直交する方向である。張り出し部41Bは、モータ本体20の径方向において、モータ本体20よりも外側へ張り出している。張り出し部41Bは、モータ本体20の軸方向からみて、ヒートシンク22およびコネクタ組立体25に重なっている。
基板41は、第1の電力経路R1および第2の電力経路R2を有している。第1の電力経路R1および第2の電力経路R2は、基板41上のパターン配線によって形成される。第1の電力経路R1は、第1の電源端子接続部53Aから供給される電力を第1のパワー回路領域A11の電子部品へ伝送するための電力経路である。第1の電力経路R1は、モータ本体20の軸方向からみて、第1の電源端子接続部53Aを起点として、境界線BLに沿って延びる部分を有する。第2の電力経路R2は、第2の電源端子接続部53Bから供給される電力を第2のパワー回路領域A12の電子部品へ伝送するための電力経路である。第2の電力経路R2は、モータ本体20の軸方向からみて、第2の電源端子接続部53Bを起点として、境界線BLに沿って延びる部分を有する。
本実施の形態は、つぎの作用および効果を奏する。
(1)モータ装置11は、たとえば車両に搭載される。この場合、車両が何らかの物体に衝突することにより、車両の一部分がモータ装置11に干渉するおそれがある。モータ装置11が車両のエンジンルームに設けられる場合、エンジンあるいは変速機がモータ装置11に干渉するおそれがある。モータ装置11がステアリングコラムに設けられる場合、ダッシュボードの内部に設けられている部品がモータ装置11に干渉するおそれがある。
本実施の形態は、つぎのように変更して実施してもよい。
・カバー42は、第1の突出部42Aに対応する領域において、他の部分よりも大きな厚みを有してもよい。このようにすれば、第1~第4の接続部P11~P14が基板41の表面から、さらに突き出すように変位する場合、第1~第4の接続部P11~P14はカバー42の端壁を貫通することが、より困難となる。
Claims (6)
- モータと、前記モータの端部に設けられるモータ制御装置とを備えるモータ装置であって、
前記モータ制御装置は、前記モータを制御するために前記モータの端部に取り付けられる基板と、前記基板を覆うように前記モータの端部に取り付けられる可撓性を有するカバーと、を有し、
前記モータは、モータ本体と、前記モータ本体の軸方向からみて前記モータ本体の側方に配置されるコネクタ組立体と、を有し、
前記基板は、前記モータ本体の軸方向からみて前記コネクタ組立体に重なるように前記モータ本体の側方へ張り出す張り出し部を有し、
前記張り出し部は、前記カバーの端壁と前記コネクタ組立体との間に位置する端子接続部を有し、前記コネクタ組立体に保持される端子が、前記張り出し部を前記コネクタ組立体から前記カバーに向けて貫通した状態で、前記端子接続部に接続され、
前記カバーは、その端壁の内面から前記基板に向けて突出する、絶縁性を有する第1の突出部を有し、
前記第1の突出部は、前記カバーの端壁が外力を受けて前記基板に近づく方向へ撓むとき、前記端子が前記カバーの端壁に接触する前に、前記端子接続部に隣接する前記基板の領域に接触するように構成されるモータ装置。 - 前記第1の突出部は、前記カバーの端壁が撓むとき、前記端子の周囲全体を囲むように前記基板に接触するように構成される周壁、または、前記端子の周囲の一部を遮るように前記基板に接触するように構成される壁を有している請求項1に記載のモータ装置。
- 前記モータ本体の端部は、導電性を有するヒートシンクを有し、
前記コネクタ組立体は、前記モータ本体の軸方向において、前記ヒートシンクの端面よりも前記基板に近い位置まで突出する、絶縁性を有する第2の突出部を有し、
前記第2の突出部は、前記カバーの端壁が撓むとき、前記基板の少なくとも一部分を前記ヒートシンクの端面に対して離隔した状態で支持するように構成される請求項1または請求項2に記載のモータ装置。 - 前記基板は、外部の電源から前記端子に供給される電力を前記モータ本体に供給する電力に変換するように構成されるパワー回路領域と、
前記電源から供給される電力を前記パワー回路領域へ伝送する電力経路と、を有し、
前記第1の突出部および前記第2の突出部は、前記モータ本体の軸方向からみて、互いに重ならないように配置され、かつ前記電力経路が延びる方向に互いに隣接するように配置されており、
前記第1の突出部および前記第2の突出部のうち少なくとも一方は、前記電力経路に交差する部分を有している請求項3に記載のモータ装置。 - 前記端子は、電源端子およびグランド端子を含み、
前記第1の突出部は、前記カバーの端壁が撓むとき、前記電源端子と前記グランド端子との間に介在する仕切壁を有している請求項1~請求項4のうちいずれか一項に記載のモータ装置。 - 請求項1~請求項5のうちいずれか一項に記載のモータ装置が備えるモータ制御装置。
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