WO2022145195A1 - 電子制御装置 - Google Patents
電子制御装置 Download PDFInfo
- Publication number
- WO2022145195A1 WO2022145195A1 PCT/JP2021/045480 JP2021045480W WO2022145195A1 WO 2022145195 A1 WO2022145195 A1 WO 2022145195A1 JP 2021045480 W JP2021045480 W JP 2021045480W WO 2022145195 A1 WO2022145195 A1 WO 2022145195A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- substrate
- control device
- electronic control
- housing
- motor
- Prior art date
Links
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Images
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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/046—Controlling the motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1427—Housings
- H05K7/1432—Housings specially adapted for power drive units or power converters
- H05K7/14322—Housings specially adapted for power drive units or power converters wherein the control and power circuits of a power converter are arranged within the same casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0403—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box
- B62D5/0406—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box including housing for electronic control unit
Definitions
- the present invention relates to an electronic control device.
- Patent Document 1 As an example of the conventional electronic control device, for example, the one described in the following Patent Document 1 is known.
- this electronic control device is integrally configured with the electric motor to be controlled by connecting the substrate housing accommodating the circuit board that drives and controls the motor to the end of the motor housing accommodating the motor element.
- the substrate housing is formed in a bottomed cylindrical shape, and inside, the first substrate and the second substrate are arranged so as to face each other in the rotation axis direction of the motor and overlap each other.
- the first substrate is fixed to the substrate housing by screwing the peripheral edge portions to a plurality of boss portions protruding from the bottom of the substrate housing.
- the second substrate is cut out so as to escape from each of the boss portions, is arranged between the first substrate and the bottom portion of the substrate housing, and is fixed to the bottom portion of the substrate housing by screwing.
- the electronic control device it is necessary to escape from each boss portion when fixing the second substrate, and a part of the second substrate is cut out. Therefore, the mounting area of the second substrate has been reduced by the amount of the notch. As a result, in order to secure a sufficient mounting area for the second board, the size of the second board is increased, and as a result, the electronic control device may be increased in size.
- the present invention has been devised in view of the technical problems of the conventional electronic control device, and provides an electronic control device capable of securing a mounting area of a circuit board and suppressing an increase in size.
- the purpose is.
- a circuit board including a first substrate and a second substrate is connected by a connecting member arranged between the first substrate and the second substrate.
- the mounting area of the circuit board is secured, and it is possible to suppress the increase in size of the electronic control device.
- FIG. 2 A first embodiment of the electronic control device according to the present invention is shown, and is an exploded perspective view of the electronic control device as viewed from the motor side. It is a vertical sectional view of the electronic control device cut along the axis Z of FIG.
- the connection member shown in FIG. 2 is shown, (a) is a perspective view, and (b) is a plan view.
- a second embodiment of the electronic control device according to the present invention is shown, and is an exploded perspective view of the electronic control device as viewed from the cover member side.
- a second embodiment of the electronic control device according to the present invention is shown, and is an exploded perspective view of the electronic control device as viewed from the motor side. It is a vertical sectional view of the electronic control device cut along the axis Z of FIG.
- a third embodiment of the electronic control device according to the present invention is shown, and is an exploded perspective view of the electronic control device as viewed from the cover member side.
- a third embodiment of the electronic control device according to the present invention is shown, and is an exploded perspective view of the electronic control device as viewed from the motor side.
- 9 is a vertical cross-sectional view of an electronic control device cut along the axis Z of FIG. 9.
- FIG. 1 shows a perspective view of the electronic control device E1 showing the appearance of the electronic control device E1 according to the first embodiment of the present invention.
- the electronic control device E is arranged in series with the axial end portion of the motor to be controlled, and is integrally configured with the motor 1 in a so-called mechanical and electrical integration.
- the motor unit MU including the electronic control device E and the motor 1 is mounted on a power steering device (not shown) to generate an assist torque corresponding to an input torque input from a steering wheel (not shown). , Assists the driver's steering operation.
- the first end 111 of the motor rotation shaft 11 is connected to a steering shaft, a rack shaft, or the like of a power steering device (not shown) via an arbitrary reduction mechanism (not shown).
- the assist torque generated by the motor 1 is transmitted to the steering shaft and the rack shaft via the deceleration mechanism, and the assist torque assists the rotation of the steering shaft and the movement of the rack shaft.
- FIG. 2 shows an exploded perspective view of the motor unit MU provided with the electronic control device E1 according to the present embodiment as viewed from the cover member 40 side.
- FIG. 3 shows an exploded perspective view of the motor unit MU provided with the electronic control device E1 according to the present embodiment as viewed from the motor 1 side.
- FIG. 4 shows a vertical cross-sectional view of the motor unit MU cut along the axis Z of FIG.
- the side in the axial direction in which the motor 1 is arranged is the “first end side Z1”
- the side in which the electronic control device E1 is arranged is the “second end portion”. It will be described as "side Z2".
- the motor 1 is housed in a first housing 10 as a motor housing in which a second end side Z2 is formed with an opening formed in a substantially cylindrical shape, and inside the first housing 10. It includes a motor element (stator 13 and rotor 14), and a motor rotation shaft 11 that is rotationally driven by the motor element. That is, the motor 1 is a three-phase motor, for example, a three-phase AC brushless motor, and the motor rotation shaft 11 is rotationally driven by the motor element to be linked to the first end portion 111 of the motor rotation shaft 11.
- An assist torque is applied to a steering shaft, a rack shaft, or the like of a power steering device (not shown) via a reduction mechanism (not shown).
- the first housing 10 is formed in a bottomed cylindrical shape by a metal material having a relatively high heat dissipation property, for example, an aluminum alloy material, and the first housing cylinder shape is formed in a substantially cylindrical shape for accommodating the motor element inside.
- the portion 101 and the first housing end wall portion 102 that closes the first end portion side Z1 of the first housing tubular portion 101 are integrally formed.
- the first housing 10 has a plurality of (three locations in the present embodiment) first housing flange portions 103 at predetermined positions in the circumferential direction on the outer peripheral side of the opening of the second end side Z2 of the first housing tubular portion 101. Is provided so as to project outward in the radial direction, and is connected to the second housing 20 via the first housing flange portion 103.
- a first shaft through hole 104 through which the first end portion 111 of the motor rotation shaft 11 penetrates is formed so as to penetrate in the axial direction.
- the first shaft through hole 104 is provided with a first bearing B1 that rotatably supports the first end portion 111 of the motor rotating shaft 11.
- the motor element is fitted to the first housing cylindrical portion 101, and the stator 13 is formed by winding a coil (three-phase winding of U-phase, V-phase, and W-phase) around an iron core (teeth), and the stator.
- a cylindrical rotor 14 is provided on the inner peripheral side of 13 so as to be rotatably accommodated through a predetermined gap, and a plurality of permanent magnets 140 are provided on the outer peripheral side so that the magnetic poles change alternately in the circumferential direction. ..
- a motor rotating shaft 11 is fixed to the inner peripheral portion of the rotor 14 by press fitting, so that the rotor 14 and the motor rotating shaft 11 can rotate integrally.
- the first end 111 of the motor rotating shaft 11 extends to the first end side Z1 of the rotor 14, and serves as an output unit that outputs an assist torque via a reduction mechanism (not shown) linked to the first end 111. Function.
- the second end 112 of the motor rotation shaft 11 extends to the second end side Z2, and the rotation position (rotation angle) of the motor rotation shaft 11 is set via the magnet MG provided on the second end 112. It functions as a rotation detector for detection.
- a bearing B2 that rotatably supports the second end 112 of the motor rotating shaft 11 is held on the inner circumference.
- the holder 12 is fitted.
- the bearing holder 12 extends along the axial direction and is provided so as to straddle the first housing 10 and the second housing 20 to be described later facing the first housing 10, and the first end side Z1 is provided on the first housing 10.
- the second end side Z2 fits into the second housing 20 described later.
- the bearing holder 12 has a configuration in which the first housing 10 and the second housing 20 are fixed together with the second housing 20 by being fixed by screws.
- the present invention is not limited to this mode. That is, the bearing holder 12 may be fixed by the fastening force between the first housing 10 and the second housing 20, or may be caulked and fixed to the first housing 10 and the second housing 20.
- the portions where the first and second housings 10 and 20 and the bearing holder 12 overlap due to fitting are fixed by crimping a plurality of locations (for example, three locations) in the circumferential direction so as to be crushed from the outer peripheral side. You may.
- the bearing holder 12 has a holder tubular portion 121 formed in a substantially cylindrical shape, and a holder end wall portion 122 that closes the second end side Z2 of the holder tubular portion 121. , It is formed in a bottomed cylindrical shape.
- a second shaft through hole 123 is formed in the center of the holder end wall portion 122 so that the second end portion 112 of the motor rotation shaft 11 faces the second end portion side Z2.
- a cylindrical boss portion 124 is formed so as to project along the axial direction toward the first end side Z1 at the hole edge portion of the first end side Z1 of the second shaft through hole 123.
- a bearing holding portion 124a whose diameter is expanded in a stepped manner toward the second end side Z2 is provided on the inner peripheral side of the boss portion 124, and the second bearing B2 is press-fitted inside the bearing holding portion 124a. Has been done.
- An annular holder flange portion 125 on which the first housing 10 and the second housing 20, which will be described later, abut from both sides in the axial direction, is formed on the holder cylindrical portion 121 so as to project outward in the radial direction. Further, on the outer peripheral side of the holder tubular portion 121, seal accommodating grooves are formed in an annular shape on both sides in the axial direction with the holder flange portion 125 interposed therebetween. 1
- the seal member S1 is accommodated, and the second seal member S2 is accommodated in the seal accommodating groove on the second end side Z2. That is, the first sealing member S1 elastically contacts the first housing 10 to tightly seal between the first housing 10 and the bearing holder 12. Similarly, the second sealing member S2 elastically abuts on the second housing 20 to tightly seal between the second housing 20 and the bearing holder 12.
- the bearing holder 12 when the bearing holder 12 is caulked and fixed to the first and second housings 10 and 20 as described above, the bearing holder 12 is hardened in liquid form instead of the first and second sealing members S1 and S2.
- the bearing holder 12 and the first and second housings 10 and 20 may be liquid-tightly sealed with a sex resin (for example, FIPG: Formed In Place Gasket).
- a bus bar (not shown) for supplying power to the coil of each phase by a resin mold is embedded inside the inner peripheral side of the holder cylindrical portion 121 and between the boss portion 124. 15 is housed.
- the bus bar mold 15 is formed in a substantially annular shape, and is linearly aligned with the end surface of the second end side Z2 of the bus bar mold 15 so as to be parallel to each other with the rotation axis Z of the motor rotation shaft 11 interposed therebetween.
- the provided first terminal mold portion 151 and the second terminal mold portion 152 are formed so as to project.
- the first terminal mold portion 151 faces the second housing 20 side through the first through hole 122a formed through the holder end wall portion 122 in an oval shape along the axial direction
- the second terminal mold portion 152 faces the holder. It is configured to face the second housing 20 side through the second through hole 122b formed through the end wall portion 122 in an oval shape along the axial direction.
- the second U-phase terminal U2 the second V-phase terminal V2, and the second W-phase terminal W2, which are the second winding terminals composed of the U-phase, V-phase, and W-phase, are second. It protrudes along the axial direction toward the two-end side Z2.
- a liquid seal LS is filled between the first terminal mold portion 151 and the first U phase terminal U1, the first V phase terminal V1 and the first W phase terminal W1, and the liquid seal LS is used.
- the first through hole 122a and the first terminal mold portion 151 and the first U phase terminal U1, the first V phase terminal V1 and the first W phase terminal W1 are hermetically sealed.
- a liquid seal LS is filled between the second terminal mold portion 152 and the second U phase terminal U2, the second V phase terminal V2, and the second W phase terminal W2, and the liquid seal LS causes the liquid seal LS.
- the second through hole 122b and the second terminal mold portion 152 and the second U phase terminal U2, the second V phase terminal V2 and the second W phase terminal W2 are hermetically sealed.
- a magnet accommodating portion 123a accommodating a magnet MG is expanded in a stepped shape toward the second end portion side Z2 in the second end side Z2 of the second shaft through hole 123. It is formed. Further, in the holder end wall portion 122, an annular seal groove having a concave cross section is formed on the outer peripheral edge of the magnet accommodating portion 123a on the side surface of the second end portion side Z2 facing the first substrate 50, which will be described later.
- the third seal member S3 is housed in this seal groove. The third sealing member S3 elastically contacts the first substrate 50 to tightly seal between the holder end wall portion 122 and the first substrate 50.
- connection protrusions 126, 126 are provided so as to project along the axial direction.
- the first connection protrusions 126 and 126 are provided integrally with the end wall portion 102 of the first housing, and penetrate through the first protrusion through holes 55 and 55 provided so as to penetrate the first substrate 50, respectively. Therefore, the first substrate 50 is fixed or positioned.
- the first connecting protrusions 126 and 126 are each formed so that the cross section is substantially circular, and a tapered conical tapered portion is formed at the tip portion thereof.
- the electronic control device E1 is formed in a substantially cylindrical shape having an outer diameter substantially the same as that of the motor 1, and is connected to the second end side Z2 of the motor 1.
- the electronic control device E1 includes a first substrate 50 and a second substrate 60, which are circuit boards housed inside a second housing 20 fixed to the first housing 10 by a screw, and a second substrate.
- a third substrate 70 which is a circuit board connected to the second end side Z2 of the housing 20 and housed inside the third housing 30, and a cover member 40 attached to the second end side Z2 of the third housing 30. And have.
- the second housing 20 is formed in a bottomed cylindrical shape by a metal material having relatively high heat dissipation, for example, an aluminum alloy material, and the second housing cylinder is formed in a substantially cylindrical shape in which the first end side Z1 opens.
- the shaped portion 21 and the second housing partition wall portion 22 which is a partition wall for closing the second end side Z2 of the second housing tubular portion 21 are integrally formed.
- a plurality of (three locations in this embodiment) second housings are located at circumferential positions corresponding to the first housing flange portion 103. 1
- the flange portion 23 is provided so as to project outward in the radial direction, and is connected to the first housing 10 via the second housing first flange portion 23. That is, the first screw SW1 penetrating the through hole 230 formed so as to penetrate the first flange portion 23 of the second housing is screwed into each female screw hole 103a provided in the first housing flange portion 103.
- the second housing 20 is fixed to the first housing 10.
- a plurality of positions (3 in the present embodiment) corresponding to the third housing flange portion 31 described later of the third housing 30 On the outer peripheral side of the opening of the second end side Z2 of the second housing tubular portion 21, a plurality of positions (3 in the present embodiment) corresponding to the third housing flange portion 31 described later of the third housing 30.
- the second housing second flange portion 24 of the second housing is provided so as to project outward in the radial direction, and is connected to the third housing 30 via the second housing second flange portion 24. That is, the second screw SW2 penetrating the third housing flange portion 31 of the third housing 30 is screwed into each female screw hole 240 provided in the second flange portion 24 of the second housing, so that the third housing 30 becomes the first. 2 It is fixed to the housing 20.
- the first end side Z1 is formed in a flat shape having a substantially constant outer diameter, while the end portion of the second end side Z2 has a stepped diameter reduction.
- a second housing diameter reduction portion 211 is formed.
- the diameter reduction portion 211 of the second housing has an outer diameter that can be fitted to the inner side surface of the first end side Z1 of the third housing 30.
- an annular seal accommodating groove continuous in the circumferential direction is formed on the outer peripheral side of the second housing reduced diameter portion 211, and the fourth seal member S4 is accommodated in the seal accommodating groove. That is, the fourth sealing member S4 elastically abuts on the inner side surface of the third housing 30, so that the space between the second housing 20 and the third housing 30 is hermetically sealed.
- the second housing partition wall portion 22 is formed to be relatively thick, and on the side surface of the first end portion side Z1, at a position facing the first connecting protrusions 126, 126, the first connecting protrusions 126, 126 and Similar second connecting protrusions 26, 26 are provided so as to project along the axial direction.
- the second connection protrusions 26, 26 are provided integrally with the second housing partition wall portion 22, and by penetrating the second protrusion through holes 66, 66 provided so as to penetrate the second substrate 60, respectively. , Used for fixing or positioning the second substrate 60.
- the second connecting protrusions 26 and 26 are formed so that their cross sections are substantially circular, respectively, like the first connecting protrusions 126 and 126, and a tapered conical tapered portion is formed at the tip portion.
- the second housing partition wall portion 22 also functions as a so-called heat sink in which the heat of the second substrate 60 is dissipated by arranging the second substrate 60 in contact with the second housing partition wall portion 22.
- the third housing 30 is made of a metal material having relatively high heat dissipation, for example, an aluminum alloy material, and is formed in a substantially cylindrical shape having openings on both sides in the axial direction.
- a third housing flange portion 31 for fixing is provided so as to project outward in the radial direction.
- a through hole 310 through which the second screw SW2 penetrates is formed in the third housing flange portion 31, and the second screw SW2 penetrating the through hole 310 is screwed into the second housing second flange portion 24. , The third housing 30 is fixed to the second housing 20.
- an engagement groove 32 provided on the cover member 40 to which the annular ridge 44 described later can be engaged is continuous in the circumferential direction.
- the engaging groove 32 has a sufficiently large groove width with respect to the annular ridge portion 44 of the cover member 40, and the engaging groove 32 is located between the engagement groove 32 and the annular ridge portion 44 of the cover member 40.
- the liquid seal LS is filled. That is, the liquid seal LS enables liquid-tight sealing between the engagement groove 32 of the third housing 30 and the annular ridge portion 44 of the cover member 40.
- the cover member 40 is integrally formed of a synthetic resin material, and is formed in a substantially disk shape, and has a cover portion 41 that closes the opening of the second end side Z2 of the third housing 30 and the cover portion 41. It has a connector portion 42 that is provided so as to project from the second end portion side Z2 of the cover portion 41 and is provided on the third substrate 70 to connect a terminal (not shown) to an external device.
- the cover member 40 is fastened and fixed to the second housing 20 together with the third housing 30 via a plurality of cover flange portions 43 (three locations in the present embodiment) provided on the outer peripheral side of the cover portion 41.
- each of the cover flange portions 43 is formed with through holes 430 through which the second screw SW2 can penetrate, and the second screw SW2 penetrating the through holes 430 is the through holes 310 of the third housing flange portion 31.
- annular ridge 44 capable of engaging with the engagement groove 32 of the third housing 30 is formed so as to project toward the first end side Z1. ..
- the annular ridge 44 is set to a size slightly smaller than the groove width and groove depth of the engagement groove 32 of the third housing 30. That is, the annular ridge portion 44 has a slight gap between the annular ridge portion 44 and the engaging groove 32 in a state of being engaged with the engaging groove 32 of the third housing 30, and the gap is filled with the liquid seal LS. As a result, the space between the annular ridge portion 44 and the engaging groove 32 of the third housing 30 can be sealed liquid tightly.
- the third substrate 70 is located on the inner peripheral side of the annular ridge portion 44 at a position symmetrical with respect to the rotation axis Z of the motor rotation shaft 11.
- a pair of board mounting portions 45, 45 to be used for fixing the third board 70 are formed so as to project so as to face the third board 70.
- the board mounting portions 45 and 45 have a substantially cylindrical shape, and internal threaded portions 450 and 450 into which the fifth screw SW5 penetrating the third substrate 70 can be screwed are formed therein. That is, the third substrate 70 is fixed to the cover portion 41 by screwing the fifth screw SW5 that penetrates the third substrate 70 into the female thread portions 450 and 450 of the substrate mounting portions 45 and 45. ..
- the external connector portion 42 is a male connector that surrounds a terminal (not shown) provided on the third substrate 70 and connects to an external device so as to face the outside through a terminal through hole (not shown) formed through the cover portion 41. Is.
- the external connector portion 42 has three substantially rectangular connector portions including a first connector portion 46, a second connector portion 47, and a third connector portion 48, and each of them is external via a female connector (not shown). It can be connected to the power supply (vehicle battery) and other electronic control devices. As a result, power is supplied to the electronic control device E1 from an external battery power source, detection signals such as the vehicle operating state are input from external sensors, and control of the power steering device is performed from the electronic control device E1. The status signal can be output to the electronic control device (ECU) on the vehicle side.
- the first substrate 50 is a circuit board formed of a resin material, for example, a glass epoxy resin, and mainly functions as a power conversion unit.
- the first substrate 50 is fixed to the bearing holder 12 via a pair of first substrate through holes 51, 51 formed through the outer peripheral side. That is, the first substrate 50 is fixed to the bearing holder 12 by screwing the third screw SW3 penetrating the first substrate through holes 51 and 51 into the holder female screw holes 127 and 127 of the bearing holder 12, respectively. It has become.
- a switching element such as a motor relay FET 52 is arranged linearly symmetrically with respect to a reference line Y passing through the rotation axis Z of the motor rotation axis 11 on the surface of the second end side Z2 of the first substrate 50.
- a dual power conversion circuit unit which is a redundant system, is configured by the elements. As a result, even if one of the power conversion circuit units fails, the other power conversion circuit unit can sustain the steering assist control, and the steering assist control with high sustainability is ensured.
- the first substrate 50 has a long hole-shaped first three-phase through which the first U-phase terminal U1, the first V-phase terminal V1 and the first W-phase terminal W1 penetrate so as to be line-symmetric with respect to the reference line Y.
- a terminal through hole 541 and a long hole-shaped second three-phase terminal through hole 542 through which the second U-phase terminal U2, the second V-phase terminal V2, and the second W-phase terminal W2 penetrate are formed through.
- the first U-phase terminal U1, the first V-phase terminal V1 and the first W-phase terminal W1 extending from the motor 1 side via the first three-phase terminal through hole 541 face the second substrate 60 side
- the second three-phase The second U-phase terminal U2, the second V-phase terminal V2, and the second W-phase terminal W2 extending from the motor 1 side via the terminal through hole 542 face the second substrate 60 side.
- a first is electrically connected to a switching element such as a motor relay FET 52 via a pattern circuit (not shown) provided on the first substrate 50.
- 1 Battery power supply terminal Vb1, 1st inverter power supply terminal Vi1 and 1st GND terminal G1, 2nd inverter power supply terminal Vi2, 2nd battery power supply terminal Vb2 and 2nd GND terminal G2 are line-symmetrical with respect to the reference line Y. It is soldered to.
- the first battery power supply terminal Vb1, the first inverter power supply terminal Vi1, and the first GND terminal G1 face the first U-phase terminal U1 from the motor 1 side to the second board 60 side via the first three-phase terminal through hole 541.
- the first V-phase terminal V1 and the first W-phase terminal W1 are arranged so as to be aligned with each other.
- the second battery power supply terminal Vb2, the second inverter power supply terminal Vi2, and the second GND terminal G2 face the second U phase from the motor 1 side to the second board 60 side via the second three-phase terminal through hole 542. It is arranged so as to be aligned with the terminal U2, the second V-phase terminal V2, and the second W-phase terminal W2.
- rotation angle sensors RE are mounted on both sides of the first end side Z1 and the second end side Z2 with the first substrate 50 interposed therebetween.
- the rotation angle sensor RE detects the rotation phase and the rotation speed of the motor rotation shaft 11 by cooperating with the magnet MG as the rotation detection unit provided on the motor rotation shaft 11.
- the rotation angle sensor RE is coated with a waterproof coating, and the waterproof coating protects the rotation angle sensor RE from moisture that has entered the electronic control device E1 side through the inside of the motor 1.
- the surface of the first end side Z1 of the first substrate 50 is coated with a copper foil capable of absorbing moisture.
- the first substrate 50 can be protected from the moisture that has entered the electronic control device E1 side through the inside of the motor 1.
- the surface of the first end side Z1 is coated with a copper foil as described above, and for example, the first substrate 50 itself is water resistant. It may be formed of a ceramic substrate having excellent properties.
- the second substrate 60 is a circuit board formed of a resin material, for example, a glass epoxy resin, and mainly functions as a power supply circuit unit.
- the second substrate 60 is fixed to the second housing partition wall portion 22 of the second housing 20 via a pair of second substrate through holes 61, 61 formed through the outer peripheral side. That is, in the second substrate 60, the fourth screw SW4 penetrating the second substrate through holes 61 and 61 is screwed into the partition wall female screw holes 25 and 25 of the second housing partition wall 22, respectively, so that the second substrate 60 has a second substrate 60.
- the surface of the second end side Z2 is fixed in contact with the second housing partition wall portion 22.
- Electronic components such as the power supply relay FET 62 and the electrolytic capacitor 63 are arranged linearly symmetrically with respect to the reference line Y passing through the rotation axis Z of the motor rotation axis 11 on the surface of the first end side Z1 of the second substrate 60. Therefore, the electronic component constitutes a dual power supply circuit unit that becomes a redundant system. As a result, even if one power supply circuit unit fails, steering assist control can be sustained by the other power supply circuit unit, and highly sustainable steering assist control is ensured.
- the second board is located at a position facing the first battery power supply terminal Vb1, the first inverter power supply terminal Vi1 and the first GND terminal G1 of the first board 50.
- the first battery power supply terminal Vb1, the first inverter power supply terminal Vi1 and the first GND terminal G1 are electrically connected to electronic components such as a power supply relay FET 62 and an electrolytic capacitor 63 via a pattern circuit (not shown) provided in the 60. It is soldered.
- a second is located at a position facing the second battery power supply terminal Vb2, the second inverter power supply terminal Vi2, and the second GND terminal G2 of the first board 50.
- a second battery power supply terminal Vb2, a second inverter power supply terminal Vi2, and a second GND terminal G2 that are electrically connected to electronic components such as a power supply relay FET 62 and an electrolytic capacitor 63 via a pattern circuit (not shown) provided on the board 60. Is soldered.
- first board 50 and the second board 60 are connected to each other via a pair of connecting members, the first connecting member 801 and the second connecting member 802.
- the first connecting member 801 and the second connecting member 802 are both formed in a substantially rectangular block shape by a resin material, have the same shape as each other, and are formed on the first substrate 50 and the second substrate 60. By being sandwiched, the first substrate 50 and the second substrate 60 are connected in a state of being separated by a certain axial distance by the height dimension of the first connecting member 801 and the second connecting member 802.
- the back surfaces of the first connecting member 801 and the second connecting member 802 are provided with a first mounting base portion 81 and a second mounting base portion 82 projecting to the back surface side, respectively, and the first and second mounting base portions 81 and 82 are provided. It is physically connected to the first substrate 50 and the second substrate 60 via the above. That is, the first mounting base 81 and the second mounting base 82 are formed with a first engaging hole 810 and a second engaging hole 820 penetrating in the axial direction, respectively, and a first board penetrating the first substrate 50.
- the connection projections 126, 126 and the second connection projections 26, 26 penetrating the second substrate 60 engage with the first engagement hole 810 and the second engagement hole 820, whereby the first substrate 50 and the second substrate 50 are engaged. 2
- the board 60 is physically connected.
- the first connection member 801 has a first battery power supply terminal hole HVb1, a first inverter power supply terminal hole HVi1, and a first U-phase terminal hole on the first and second end faces 801a and 801b, respectively.
- the HU1, the first V-phase terminal hole HV1, the first W-phase terminal hole HW1, and the first GND terminal hole HG1 are openly formed.
- the second battery power supply terminal hole HVb2, the second inverter power supply terminal hole HVi2, the second U phase terminal hole HU2, and the second V phase terminal are formed on the first and second end faces 802a and 802b, respectively.
- the hole HV2, the second W phase terminal hole HW2, and the second GND terminal hole HG2 are openly formed.
- the 1st GND terminal hole HG1 the 1st battery power supply terminal Vb1, the 1st inverter power supply terminal Vi1, the 1st U phase terminal U1, the 1st V phase terminal V1, the 1st W phase terminal W1 and the 1st GND extending from the 1st board 50 side.
- the terminal G1 is connected to the first battery power supply terminal hole HVb1 on the second end surface 801b side of the first connection member 801 and the first inverter power supply terminal hole HVi1 and the first GND terminal hole HG1 extending from the second board 60 side.
- 1 Battery power supply terminal Vb1, first inverter power supply terminal Vi1 and first GND terminal G1 are connected.
- a second battery power supply terminal Vb2 extending from the first board 50 side, a second inverter power supply terminal Vi2, a second U phase terminal U2, a second V phase terminal V2, a second W phase terminal W2 and a second
- the 2GND terminal G2 is connected and extends from the second substrate 60 side to the second battery power supply terminal hole HVb2, the second inverter power supply terminal hole HVi2 and the second GND terminal hole HG2 on the second end surface 802b side of the second connection member 802.
- the second battery power supply terminal Vb2, the second inverter power supply terminal Vi2, and the second GND terminal G2 are connected.
- the first substrate 50 and the second substrate 60 are electrically connected via the first connecting member 801 and the second connecting member 802.
- the first capacitor substrate 831 is arranged on the inner surface which is orthogonal to the first connection member 801 and faces the rotation axis Z side.
- a pattern circuit 841 formed by connecting a first inverter power supply terminal Vi1 and a first GND terminal G1 is formed on the first capacitor board 831, and three electrolytic capacitors 85 are a first connection member in the pattern circuit 841. It is mounted so as to be aligned in the width direction of 801 (see FIG. 5).
- the second capacitor substrate 832 is arranged on the inner side surface facing the rotation axis Z side.
- a pattern circuit 842 formed by connecting the second inverter power supply terminal Vi2 and the second GND terminal G2 is formed on the second capacitor board 832, and three electrolytic capacitors 85 are mounted on the pattern circuit 842. (See FIG. 5).
- the pattern circuits 841,842 are exemplified in the present embodiment in which the entire pattern circuits 841,842 are formed on the surfaces of the first and second capacitor substrates 831,832, but the present embodiment is limited to this embodiment.
- a part of the pattern circuit 841,842 can be formed on the back surface of the first and second capacitor boards 831 and 832.
- the space on the surface of the first and second capacitor boards 831,832 can be effectively utilized, the layout of the electrolytic capacitor 85 is improved, and the first and second capacitor boards 831,832 can be further miniaturized. be.
- the third substrate 70 is a circuit board formed of a resin material, for example, a glass epoxy resin, and mainly functions as a control circuit unit.
- the third substrate 70 is fixed to the cover portion 41 of the cover member 40 via a pair of third substrate through holes 71, 71 formed through the outer peripheral side. That is, the third substrate 70 is screwed into the female threaded portions 450 and 450 of the substrate mounting portions 45 and 45, respectively, in which the fifth screw SW5 penetrating the third substrate through holes 71 and 71 is formed in the cover portion 41. , The third substrate 70 is fixed to the cover portion 41.
- An electronic component such as a microcomputer MPU72 is mounted on the surface of the first end side Z1 of the third substrate 70 at a substantially central position, and the control circuit section is configured by this electronic component.
- electronic components such as an electrolytic capacitor 73 are mounted on the surface of the second end side Z2 of the third substrate 70.
- a plurality of terminals (not shown) connected to pattern circuits (not shown) provided on both sides of the third board 70 are soldered to the surface of the second end side Z2 of the third board 70. ..
- the terminals (not shown) face the inside of the first connector portion 46, the second connector portion 47, and the third connector portion 48 through the terminal through holes (not shown) provided through the cover portion 41. It is connected to an external device via a female connector (not shown) connected to the first to third connector portions 46 to 48.
- the second board 60 and the third board 70 are electrically connected to each other via an internal connector CN that supplies power to the second board 60 and transmits / receives control signals.
- the internal connector CN is provided on the surface of the second substrate side connector CN1 provided on the surface of the second end side Z2 of the second substrate 60 and the third surface of the third substrate 70 on the surface of the first end side Z1. It is composed of a board-side connector CN2.
- the second board-side connector CN1 and the third board-side connector CN2 can be connected to each other via a connector communication hole 27 formed so as to penetrate the second housing partition wall portion 22 in a substantially rectangular shape. ..
- the internal connector CN serves to supply power to the second board 60 and to send and receive control signals to and from the second board 60.
- the internal connector CN it is also possible to separate the internal connector CN and configure the power supply connector and the signal transmission connector with different connectors.
- the problems of the conventional electronic control device can be solved by achieving the following effects.
- the electronic control device E1 is an electronic control device that drives and controls a motor 1 having U-phase, V-phase, and W-phase three-phase windings (coils (not shown)), and is an electronic component that drives and controls the motor 1.
- First terminal (first battery power supply terminal Vb1, first inverter power supply terminal Vi1, first U extending from the first board 50 side) provided on the surface facing the second board 60 and used for connection with the second board 60.
- the mounting area of the first board 50 and the second board 60 is sacrificed by connecting the first board 50 and the second board 60 via the connecting members 801, 802.
- the first substrate 50 and the second substrate 60 can be fixed without any problem.
- a sufficient mounting area for the first substrate 50 and the second substrate 60 can be secured, and as a result, it is possible to contribute to the miniaturization of the electronic control device.
- the first substrate 50 is fixed to the motor 1 (bearing holder 12) by the third screw SW3, and the second substrate 60 is fixed to the second housing partition wall portion 22 by the fourth screw SW4.
- the first substrate 50 and the second substrate 60 can be fixed only by the connecting members 801, 802.
- the first substrate 50 when the first substrate 50 is fixed to the motor 1 (bearing holder 12) by the third screw SW3, the first substrate 50 and the second substrate 60 can be fixed more firmly, so that the electrons can be obtained. It can contribute to the improvement of durability and reliability of the control device E1.
- the motor 1 has a first end portion 111 which is an end portion on the side where the driving force of the motor 1 is transmitted, and a second end portion 112 which is located on the opposite side of the first end portion 111.
- the electronic control device E1 is arranged on the second end 112 side, and the first terminal is a terminal connected to the three-phase winding (first U-phase terminal U1, It includes a first V-phase terminal V1 and a first W-phase terminal W1, or a second U-phase terminal U2, a second V-phase terminal V2, and a second W-phase terminal W2).
- the motor 1 and the electronic control device E1 can be integrated into a module. ..
- the handling of the motor 1 and the electronic control device E1 becomes better than in the case where the motor 1 and the electronic control device E1 are mounted separately.
- the length of the connection connecting the motor 1 and the electronic control device E1 can be shortened, and the motor 1 can be provided with good drive control.
- connection members 801, 802 are the first terminal (first battery power supply terminal Vb1, first inverter power supply terminal Vi1, first U-phase terminal U1, first V-phase terminal extending from the first board 50 side). V1, 1st W phase terminal W1 and 1st GND terminal G1, or 2nd battery power supply terminal Vb2, 2nd inverter power supply terminal Vi2, 2nd U phase terminal U2, 2nd V phase terminal V2, 2nd W phase terminal W2 and 2nd GND terminal G2 ) And the second terminal (first battery power supply terminal Vb1, first inverter power supply terminal Vi1 and first GND terminal G1, or second battery power supply terminal Vb2, second inverter power supply terminal Vi2 and second extending from the second board 60 side. It is electrically connected to the 2GND terminal G2).
- the connecting members 801, 802 are connected to the first terminal (first inverter power supply terminal Vi1 or the like extending from the first board 50 side, or second inverter power supply terminal Vi2 or the like) and the second terminal (from the second board 60 side).
- the connection members 801, 802 can be physically connected to the first board 50 and the second board 60.
- It also serves as an electrical connection between the first substrate 50 and the second substrate 60.
- the first substrate 50 and the second substrate 60 can be easily connected with a simple configuration of the connecting members 801, 802.
- a first housing 10 accommodating at least a part of the motor 1 and a partition wall (second housing partition wall portion 22) facing the second end portion 112 of the motor rotation shaft 11 are provided, and the partition wall (second housing partition wall portion 22) is provided.
- a second housing 20 for accommodating the first substrate 50, the second substrate 60, and the connecting members 801, 802 is provided in the internal space on the motor 1 side of the second housing partition wall portion 22), and the second substrate 60 is provided.
- the surface opposite to the 1 substrate 50 is in contact with the partition wall (second housing partition wall portion 22).
- the second housing partition wall portion 22 causes the second substrate 60 to be second.
- the movement to the housing partition wall portion 22 side (second end portion side Z2) is restricted, and the second substrate 60 can be accommodated more stably by the second housing 20.
- the second housing partition wall portion 22 also provides heat dissipation to the second substrate 60.
- a bearing holder 12 extending in the axial direction of the motor rotation shaft 11 and fitting into the first housing 10 and the second housing 20 is provided between the first housing 10 and the second housing 20.
- the bearing holder 12 holds a bearing (second bearing B2) that supports the second end 112 side of the motor rotating shaft 11, and is located on the second end 112 side of the motor rotating shaft 11 in the bearing holder 12.
- the surface of the first substrate 50 opposite to the second substrate 60 is in contact with the surface.
- the surface of the second substrate 60 opposite to the first substrate 50 is supported by the second housing partition wall portion 22, the surface of the first substrate 50 opposite to the second substrate 60 is seconded.
- the first substrate 50 and the second substrate 60 connected by the connecting members 801, 802 can be sandwiched from both sides in the axial direction.
- the first substrate 50 and the second substrate 60 can be stably accommodated in the second housing 20.
- the magnet MG is attached to the second end 112 of the motor rotation shaft 11, and the surface of the first substrate 50 opposite to the second substrate 60 is positioned so as to face the magnet MG.
- a rotation angle sensor RE that detects the rotation angle of the motor rotation shaft 11 is mounted.
- the magnet MG is arranged on the second end 112 of the motor rotation shaft 11 and is on the surface of the first substrate 50 facing the magnet MG on the side opposite to the second substrate 60 (first end side Z1).
- the rotation angle sensor RE By mounting the rotation angle sensor RE, it becomes possible to arrange the rotation angle sensor RE at an optimum position, which is used for good detection of the rotation phase and rotation angle of the motor rotation shaft 11.
- the circuit board further includes a third board 70, and a control circuit unit (MPU72) whose main function is drive control of the motor 1 is mounted on the third board 70.
- the 3 substrate 70 is housed in a third housing 30 arranged on the side opposite to the first housing 10 of the second housing 20.
- the circuit board constituting the control circuit section when the circuit board constituting the control circuit section is arranged on the motor side as in the conventional electronic control device, the circuit board constituting the control circuit section constitutes a power conversion circuit section such as an inverter. It is configured to be sandwiched between the board and the motor. In this case, a relatively large current for driving and controlling the motor passes through the circuit board constituting the control circuit unit sandwiched between the circuit board constituting the power conversion circuit unit and the motor. , A shielding structure for protecting the circuit board constituting the control circuit unit from electromagnetic influence is required.
- the third board 70 constituting the control circuit section is arranged at the axial end portion opposite to the motor 1, and the third board 70 constitutes the power conversion circuit section. It is not arranged between the 1st board 50 or the 2nd board 60 and the motor 1. Therefore, there is no possibility that a relatively large current for driving and controlling the motor 1 will pass through the third substrate 70, and a circuit board constituting the control circuit unit is arranged on the motor side as in the conventional electronic control device. As compared with the case, the shielding structure can be omitted. As a result, the number of parts can be reduced and the assembly workability can be improved by simplifying the structure of the electronic control device E1.
- the third substrate 70 is housed in the third housing 30, but also as in the second and third embodiments described later, the third substrate 70 is integrally provided. Needless to say, the same effect can be obtained even in the mode of accommodating the second housing 20.
- the first substrate 50 and the second substrate 60 are housed in the second housing 20, and the third board 70 is housed in the third housing 30 connected to the second housing 20.
- the second substrate 60 and the third substrate 70 can be integrally provided. As a result, the length of the connection connecting the boards 50, 60, and 70 can be shortened, which provides good drive control for the motor 1.
- the side surfaces of the connecting members 801, 802 are branched from the power supply and the ground connected to the power conversion circuit unit (switching element such as the motor relay FET 52) whose main function is to drive the motor 1.
- a power supply terminal first inverter power supply terminal Vi1 and second inverter power supply terminal Vi2
- a ground terminal first GND terminal G1 and second GND terminal G2
- a power supply terminal first inverter power supply terminal Vi1 and second inverter
- a capacitor (electrolytic capacitor 85) 5 for rectifying the current of the power conversion circuit unit (switching element such as motor relay FET 52) is connected to the power supply terminal Vi2) and the ground terminal (first GND terminal G1 and second GND terminal G2). There is.
- the electrolytic capacitor for rectification between the three-phase winding (U-phase, V-phase, W-phase coil) of the motor 1 and the power conversion circuit unit (switching element such as the motor relay FET 52).
- the positional relationship between the three-phase winding (U-phase, V-phase, W-phase coil) of the motor 1 and the power conversion circuit unit (switching element such as the motor relay FET 52) and the capacitor (electrolytic capacitor 85) is relatively short. Is possible. As a result, the noise suppression effect of the capacitor (electrolytic capacitor 85) can be improved.
- the capacitor (electrolytic capacitor 85) is provided so as to be orthogonal to the connecting members 801, 802.
- the electrolytic capacitor 85 is arranged between the first substrate 50 and the second substrate 60 so as to be orthogonal to the connecting members 801, 802, so that the first substrate 50 and the second substrate 60 are arranged. It is possible to effectively utilize the space formed between the two and, and it is possible to contribute to the miniaturization of the electronic control device E1.
- [Second Embodiment] 6 to 8 show a second embodiment of the electronic control device according to the present invention, and the configurations of the second housing 20 and the third housing 30 of the electronic control device E1 according to the first embodiment are changed. be. Since the basic configurations other than these changes are the same as those of the first embodiment, the same configurations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. ..
- FIG. 6 shows an exploded perspective view of the motor unit MU provided with the electronic control device E2 according to the present embodiment as viewed from the cover member 40 side.
- FIG. 7 shows an exploded perspective view of the motor unit MU provided with the electronic control device E2 according to the present embodiment as viewed from the motor 1 side.
- FIG. 8 shows a vertical cross-sectional view of the motor unit MU cut along the axis Z of FIG.
- the side in the axial direction in which the motor 1 is arranged is the "first end side Z1”
- the side in which the electronic control device E2 is arranged is the "second end”. It will be described as "side Z2".
- the third housing 30 according to the first embodiment is integrally formed with the second housing 20, and as shown in FIG.
- the second housing 20 is formed so as to have an H shape in a vertical cross section.
- the third housing 30 according to the first embodiment is integrally formed as the second housing 20, so that the third housing 30 and the fourth seal member according to the first embodiment are integrally formed.
- the number of parts such as S4 can be reduced, and the assembling workability of the electronic control device E2 can be improved.
- the divided portion between the second housing 20 and the third housing 30 according to the first embodiment can be omitted due to the integrated structure as described above, the infiltration of water from the outside through the divided portion is suppressed. There is also a merit that can be done.
- FIG. 9 to 11 show a third embodiment of the electronic control device according to the present invention, and is a modification of the configuration of the second housing 20 of the electronic control device E2 according to the second embodiment. Since the basic configuration other than such changes is the same as that of the second embodiment, the same configurations as those of the second embodiment are designated by the same reference numerals, and the description thereof will be omitted. ..
- FIG. 9 shows an exploded perspective view of the motor unit MU provided with the electronic control device E3 according to the present embodiment as viewed from the cover member 40 side.
- FIG. 10 shows an exploded perspective view of the motor unit MU provided with the electronic control device E3 according to the present embodiment as viewed from the motor 1 side.
- FIG. 11 shows a vertical cross-sectional view of the motor unit MU cut along the axis Z shown in FIG.
- the side in the axial direction in which the motor 1 is arranged is the "first end side Z1”
- the side in which the electronic control device E3 is arranged is the "second end”. It will be described as "side Z2".
- the second housing partition wall portion 22 according to the second embodiment is configured as a heat sink member 90 separately from the second housing 20. Has been done.
- the heat sink member 90 is formed in a substantially disk shape by a metal material having relatively high heat dissipation, for example, an aluminum alloy material similar to that of the second housing 20.
- the second connecting protrusions 26, 26 similar to the first connecting protrusions 126, 126 are arranged along the axial direction at positions facing the first connecting protrusions 126, 126 on the surface of the first end side Z1. It is provided so as to project, and is fixed to the connecting members 801, 802 via the second connecting protrusions 26, 26. That is, the heat sink member 90 penetrates the second protrusion through holes 66, 66 of the second substrate 60 and engages with the first engagement hole 810 and the second engagement hole 820 of the connection members 801, 802. It is fixed to the connecting members 801, 802 together with the second substrate 60.
- the second substrate 60 is separately fastened to the heat sink member 90 via the fourth screw SW4, but the second connecting protrusions 26 and 26 and the second protrusion through holes 66 and 66 are used. Depending on the fit, it is possible to abolish the fastening by the 4th screw SW4.
- the partition wall (heat sink member 90) is provided separately from the second housing 20, the first substrate 50 is fixed to the bearing holder 12, and the second substrate 60 is a partition wall. It is fixed to (heat sink member 90).
- the first substrate 50 is fixed to the bearing holder 12, and the second substrate 60 is fixed to the partition wall (heat sink member 90).
- the first substrate 50 and the second substrate 60 can be appropriately accommodated in the second housing 20 without being affected by the dimensional accuracy of the second housing 20, the first substrate 50, and the second substrate 60. ..
- the present invention is not limited to the configurations and embodiments exemplified in the above-described embodiment, and any embodiment of the present invention can be freely applied according to specifications, costs, and the like as long as the above-mentioned functions and effects of the present invention can be achieved. It can be changed.
- the embodiment in which the first substrate 50 and the second substrate 60 are formed of a resin material (glass epoxy resin) has been exemplified, but the first substrate 50 and the second substrate 60 are made of metal. It may be formed as a metal substrate formed of a material.
- the electronic control device is an electronic control device that drives and controls a motor having a three-phase winding, and is a circuit board on which electronic components that drive and control the motor are mounted.
- a circuit board including a first substrate and a second substrate arranged to face each other, and a first terminal provided on a surface of the first substrate facing the second substrate and used for connection with the second substrate.
- the second terminal provided on the surface of the second substrate facing the first substrate and used for connection with the first substrate is arranged between the first substrate and the second substrate. It is provided with a connecting member that is connected to the first terminal and the second terminal and can maintain a constant distance between the first substrate and the second substrate.
- the motor has a first end, which is an end on the side that transmits the driving force of the motor, and a second end, which is located on the opposite side of the first end.
- the electronic control device is arranged on the second end side, and the first terminal includes a terminal connected to the three-phase winding.
- the connecting member electrically connects the first terminal and the second terminal.
- a first housing accommodating at least a part of the motor and a partition wall facing the second end of the motor rotation shaft are provided.
- the internal space on the motor side of the partition wall includes the first substrate, the second substrate, and the second housing for accommodating the connecting member, and the second substrate is on the opposite side of the first substrate. The surface is in contact with the partition wall.
- the first housing and the first housing extend in the axial direction of the motor rotation shaft between the first housing and the second housing.
- the bearing holder has a bearing holder that fits into the housing, and the bearing holder holds a bearing that supports the second end side of the motor rotation shaft, and the second end of the motor rotation shaft in the bearing holder is held.
- the surface of the first substrate opposite to the second substrate is in contact with the surface on the end side.
- the partition wall is provided separately from the second housing, the first substrate is fixed to the bearing holder, and the second. The substrate is fixed to the partition wall.
- a magnet is attached to the second end of the motor rotation shaft, which is opposite to the second substrate of the first substrate.
- a rotation angle sensor that detects the rotation angle of the motor rotation shaft is mounted on the surface at a position facing the magnet.
- the circuit board further includes a third substrate, and the third substrate includes a control circuit unit whose main function is drive control of the motor 1. Is mounted, and the third substrate is housed in a third housing arranged on the opposite side of the second housing from the first housing.
- the side surface of the connecting member is branched from a power supply and a ground connected to a power conversion circuit unit whose main function is to drive the motor.
- a power supply terminal and a ground terminal are provided, and a capacitor for rectifying the current of the power conversion circuit unit is connected to the power supply terminal and the ground terminal.
- the capacitor is provided so as to be orthogonal to the connecting member.
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Abstract
Description
[第1実施形態]
図1は、本発明の第1実施形態に係る電子制御装置E1の外観を表した電子制御装置E1の斜視図を示している。
前記従来の電子制御装置は、第2基板の固定に際し、前記各ボス部を逃げる必要があるため、第2基板の一部が切り欠かれた構成となっていた。このため、かかる切り欠きの分だけ、第2基板の実装面積が減少してしまっていた。これにより、第2基板の十分な実装面積を確保するためには、第2基板の大型化を招来し、その結果、電子制御装置が大型化しまうおそれがあった。
図6~図8は、本発明に係る電子制御装置の第2実施形態を示し、前記第1実施形態に係る電子制御装置E1の第2ハウジング20と第3ハウジング30の構成を変更したものである。なお、かかる変更点以外の基本的な構成については、前記第1実施形態と同様であるため、当該第1実施形態と同一の構成については、同一の符号を付すことにより、その説明を省略する。
図9~図11は、本発明に係る電子制御装置の第3実施形態を示し、前記第2実施形態に係る電子制御装置E2の第2ハウジング20の構成を変更したものである。なお、かかる変更点以外の基本的な構成については、前記第2実施形態と同様であるため、当該第2実施形態と同一の構成については、同一の符号を付すことにより、その説明を省略する。
Claims (11)
- 三相巻線を有するモータを駆動制御する電子制御装置であって、
前記モータを駆動制御する電子部品を実装する回路基板であって、互いに対向して配置される第1基板及び第2基板を含む回路基板と、
前記第1基板の前記第2基板と対向する面に設けられ、前記第2基板との接続に供する第1端子と、
前記第2基板の前記第1基板と対向する面に設けられ、前記第1基板との接続に供する第2端子と、
前記第1基板と前記第2基板との間に配置されていて、前記第1端子と前記第2端子に接続され、前記第1基板と前記第2基板との間の距離を一定に保持可能な接続部材と、
を備えたことを特徴とする電子制御装置。 - 請求項1に記載の電子制御装置であって、
前記モータは、前記モータの駆動力を伝達する側の端部である第1端部と、前記第1端部の反対側に位置する第2端部と、を有するモータ回転軸を備え、
前記電子制御装置は、前記第2端部側に配置されていて、
前記第1端子は、前記三相巻線に接続される端子を含む
ことを特徴とする電子制御装置。 - 請求項2に記載の電子制御装置であって、
前記接続部材は、前記第1端子と前記第2端子とを電気的に接続する
ことを特徴とする電子制御装置。 - 請求項3に記載の電子制御装置であって、
前記モータの少なくとも一部を収容する第1ハウジングと、
前記モータ回転軸の前記第2端部と対向する隔壁が設けられ、前記隔壁よりも前記モータ側の内部空間に、前記第1基板、前記第2基板及び前記接続部材を収容する第2ハウジングと、
を備え、
前記第2基板の前記第1基板とは反対側の面が前記隔壁に当接する
ことを特徴とする電子制御装置。 - 請求項4に記載の電子制御装置であって、
前記第1ハウジングと前記第2ハウジングとの間に、前記モータ回転軸の軸方向に延出し、前記第1ハウジングと前記第2ハウジングとに嵌合するベアリングホルダを有し、
前記ベアリングホルダには、前記モータ回転軸の前記第2端部側を支持するベアリングが保持され、
前記ベアリングホルダにおける前記モータ回転軸の前記第2端部側の面に、前記第1基板の前記第2基板とは反対側の面が当接する
ことを特徴とする電子制御装置。 - 請求項5に記載の電子制御装置であって、
前記隔壁は、前記第2ハウジングとは別体に設けられ、
前記第1基板は、前記ベアリングホルダに固定され、
前記第2基板は、前記隔壁に固定される
ことを特徴とする電子制御装置。 - 請求項6に記載の電子制御装置であって、
前記モータ回転軸の前記第2端部には、マグネットが取り付けられ、
前記第1基板の前記第2基板とは反対側の面には、前記マグネットと向かい合う位置に、前記モータ回転軸の回転角を検出する回転角センサが実装される
ことを特徴とする電子制御装置。 - 請求項4に記載の電子制御装置であって、
前記回路基板は、第3基板をさらに含み、
前記第3基板には、モータ1の駆動制御を主たる機能とする制御回路部が実装されていて、
前記第3基板は、前記第2ハウジングの前記第1ハウジングとは反対側に配置される第3ハウジングに収容される
ことを特徴とする電子制御装置。 - 請求項8に記載の電子制御装置であって、
前記モータ回転軸の前記第2端部には、マグネットが取り付けられ、
前記第1基板の前記第2基板とは反対側の面には、前記マグネットと向かい合う位置に、前記モータ回転軸の回転角を検出する回転角センサが実装される
ことを特徴とする電子制御装置。 - 請求項3に記載の電子制御装置であって、
前記接続部材の側面には、前記モータの駆動を主たる機能とする電力変換回路部に接続される電源及びグランドから分岐する、電源端子及びグランド端子が設けられていて、
前記電源端子及び前記グランド端子には、前記電力変換回路部の電流を整流するコンデンサが接続されている
ことを特徴とする電子制御装置。 - 請求項10に記載の電子制御装置であって、
前記コンデンサは、前記接続部材に対して直交するように設けられている
ことを特徴とする電子制御装置。
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JP2020127334A (ja) * | 2019-02-06 | 2020-08-20 | 日立オートモティブシステムズ株式会社 | 電動駆動装置 |
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JP2020127334A (ja) * | 2019-02-06 | 2020-08-20 | 日立オートモティブシステムズ株式会社 | 電動駆動装置 |
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WO2024017638A1 (de) * | 2022-07-20 | 2024-01-25 | Siemens Aktiengesellschaft | Leistungselektronik-baugruppe und elektromotor |
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