Electronic control device and assembly method of electronic control device

Abstract

The object of the present invention is to improve the installation efficiency of components. The electronic control device of the present invention comprises: a power supply substrate (23), which has a first insertion hole portion (R1A) and a second insertion hole portion (R2A), wherein the first insertion hole portion (R1A) has a plurality of holes (23Aa-1U, 23Aa-1V, 23Aa-1W) for inserting the coil wire of the first system, and the second insertion hole portion (R2A) has a plurality of holes (23Aa-2U, 23Aa-2V, 23Aa-2W) for inserting the coil wire of the second system; a control substrate (25), which is arranged on the upper part of the power supply substrate (23); and an inter-substrate connector (105), which electrically connects the power supply substrate (23) and the control substrate (25), and the first insertion hole portion (R1A) and the second insertion hole portion (R2A) are uniformly arranged on the same side of the power supply substrate (23).

Description

Technical Field

[0001] The invention relates to an electronic control device suitable for being arranged in an electric power steering device and an assembling method thereof. Background Art

[0002] As background art in this technical field, a drive device for an electric power steering device described in Japanese Patent Application Laid-Open No. 2016-36244 (Patent Document 1) is known.

[0003] In the drive device of Patent Document 1, the substrate 41 is provided on one side of the motor. The first switching elements (SW elements) 51 to 56 are arranged on the heating element mounting surface 42. The second switching elements (SW elements) 61 to 66 are arranged in the second region R2 of the substrate 41, which is the same surface as the surface on which the first switching elements 51 to 56 are arranged, and is an area on the opposite side of the first region R1 on which the first switching elements 51 to 56 are arranged across the axial center O of the motor 10. The first motor wire 135 is taken out phase by phase from the first winding and arranged on the substrate 41, and the second motor wire 145 is taken out phase by phase from the second winding and arranged on the substrate 41. The first motor wire 135 and the first switching elements 51 to 56 and the second motor wire 145 and the second switching elements 61 to 66 are arranged in opposite order starting from the power supply area Rin side. As a result, the phase deviation of the wiring length from the power supply area Rin is reduced. Refer to the abstract above. In addition, the above-mentioned reference numerals directly describe the reference numerals described in Patent Document 1, and have no relationship with the reference numerals in this specification and the drawings.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2016-36244 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] In the drive device of Patent Document 1, the first motor wire and the first switching element and the second motor wire and the second switching element are arranged in areas on opposite sides of the motor's axial center. The first motor wire and the first switching element are preferably arranged in close positions, and the second motor wire and the second switching element are preferably arranged in close positions. In addition, since the first switching element and the second switching element are heating elements, it is preferred that the back side (the surface on the opposite side of the heating element mounting surface relative to the heating element mounting surface) of the substrate in the first area where the first switching element is arranged and the second area where the second switching element is arranged be in contact with a frame member (referred to as a base in this specification) to improve the heat dissipation effect from the substrate to the frame member. In this case, components cannot be installed on the back side of the substrate in the first area and the second area.

[0009] To minimize the size of the device, it is preferable to effectively utilize the back side of the substrate as a component mounting surface. In this case, if the first motor wire and the first switching element are arranged in opposite areas across the motor axis, as in the drive device disclosed in Patent Document 1, the contact portion between the substrate and the frame member is dispersed, reducing the efficiency of component mounting on the back side of the substrate.

[0010] The object of the present invention is to improve the efficiency of component installation.

[0011] Means for solving problems

[0012] In order to achieve the above object, the electronic control device of the present invention comprises:

[0013] a power supply substrate having a first insertion hole portion having a plurality of holes for inserting the coil wires of the first system, and a second insertion hole portion having a plurality of holes for inserting the coil wires of the second system;

[0014] a control substrate disposed on an upper portion of the power substrate; and

[0015] an inter-substrate connector that electrically connects the power substrate and the control substrate,

[0016] The first insertion hole portion and the second insertion hole portion are arranged on the same side of the power substrate.

[0017] Effects of the Invention

[0018] According to the present invention, heat generating components can be concentrated and the back side of the power supply board can be effectively utilized, thereby improving component mounting efficiency. Other problems, structures, and effects than those described above will become clear from the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is an overall perspective view of an electric power steering device according to one embodiment of the present invention.

[0020] Figure 2 This is an exploded perspective view of a cross section of an electronic control device including an electric power steering device according to one embodiment of the present invention.

[0021] Figure 3 It is from Figure 2 A perspective view of the electronic control unit with the control substrate removed.

[0022] Figure 4 It is a plan view showing the switching element mounting surface of the power supply substrate.

[0023] Figure 5 This is a perspective view including a cross section showing a state where a power supply board is assembled on a base.

[0024] Figure 6A This is a perspective view showing a structure for preventing deflection of a power supply substrate.

[0025] Figure 6B This is a perspective view of a power supply board showing the arrangement of the deflection prevention structure and the load input position in the analysis of the deflection amount.

[0026] Figure 6C This is a perspective view of a power supply board showing the analysis results of the deflection amount when a deflection prevention structure is provided.

[0027] Figure 6D This is a perspective view of a power supply board showing the analysis results of the deflection amount when there is no deflection prevention structure.

[0028] Figure 7 This is a conceptual diagram explaining the end processing of the coil wire.

[0029] Figure 8 It is a figure which shows the comb jig used for processing the end of a coil wire. DETAILED DESCRIPTION

[0030] The embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, sometimes the up-down direction and the left-right direction are specified for description, but the up-down direction and the left-right direction are based on Figure 2-Figure 5 、 Figure 8 The up-down direction and the left-right direction in the figure may not be consistent with the up-down direction and the left-right direction in the actual installation state of the device.

[0031] Figure 1 It is an overall perspective view of an electric power steering device 1 as an example to which the present invention is applied.

[0032] The electric power steering device 1 is a device for steering the steering wheels (usually the front wheels) of a car. Figure 1 The vehicle is constructed as shown. A pinion (not shown) is mounted at the lower end of a steering shaft 2 connected to a steering wheel (not shown). This pinion is elongated in the left-right direction of the vehicle body and meshes with a rack (not shown). Tie rods 3 for steering the front wheels left and right are connected to both ends of the rack. The rack is covered by a rack housing 4. A rubber boot 5 is installed between the rack housing 4 and the tie rods 3.

[0033] To assist the torque used to rotate the steering wheel, an electric drive unit 6 is provided. The electric drive unit 6 includes a torque sensor 7 that detects the rotational direction and torque of the steering shaft 2; a motor unit 8 that applies steering assist force to the rack via a gear 10 based on the values detected by the torque sensor 7; and an electronic control unit (ECU) 9 that controls the motor disposed within the motor unit 8. The outer periphery of the motor unit 8 on the output shaft side of the electric drive unit 6 is connected to the gear 10 via bolts (not shown). The electronic control unit 9 is provided at the end of the motor unit 8 opposite the output shaft side. The torque sensor 7 may also be configured separately from the electric drive unit 6.

[0034] In the electric drive device 6, when the steering shaft 2 is rotated in any direction by operating the steering wheel, the torque sensor 7 detects the rotation direction and rotation torque of the steering shaft 2. Based on the detected values, the electronic control unit 9 calculates the driving operation amount of the motor. Based on the calculated driving operation amount, the power supply board (inverter board, power conversion board) 23 (see Figure 2 ) switches 101 to drive the motor, causing the motor's output shaft to rotate in the same direction as the steering operation. The output shaft's rotation is transmitted from a pinion (not shown) via gear 10 to a rack (not shown), steering the vehicle. These structures and functions are well known, so further explanation is omitted.

[0035] Figure 2 It is an exploded perspective view of a cross section of an electronic control unit 9 including the electric power steering system 1 according to one embodiment of the present invention. Figure 3 It is from Figure 2 23 is removed from the electronic control unit 9. Figure 2 In the figure, the cover covering the power supply board 23 and the control board 25 is omitted from illustration.

[0036] The electronic control unit 9 is fixed to one end portion (the end portion opposite the output shaft side) of the motor along the axial direction AD of the rotating shaft (output shaft). In this embodiment, the axial direction AD is defined with respect to the rotating shaft (output shaft) of the motor. In the following description, the direction along the axial direction AD of the rotating shaft will be simply referred to as the axial direction.

[0037] like Figure 2As shown, the electronic control unit 9 is configured to include a base substance 21, a power supply substrate 23 fixed to the base substance 21, and a control substrate 25. The base substance 21 of the electronic control unit 9 is fixed to the motor housing (not shown) of the motor unit 8. The base substance 21 and the motor housing are made of aluminum alloy or the like. The power supply substrate 23 and the control substrate 25 are stacked in the axial direction AD, with the power supply substrate 23 positioned on the base substance 21 side (lower side) relative to the control substrate 25. In other words, the control substrate 25 is positioned on the side opposite to the base substance 21 side (upper side) relative to the power supply substrate 23.

[0038] Lead wires (coil input terminals) 8A from the motor coils provided in the motor unit 8 extend through the base 21 and out to the upper surface side (opposite to the base 21 side) of the power substrate 23, electrically connecting to the output terminals of the switching element 101 on the power substrate 23. To this end, through-holes 23Aa are provided in the base member (power substrate member) 23A of the power substrate 23, through which the coil input terminals 8A are inserted and extended to the upper surface side of the power substrate 23. The coil input terminals 8A are soldered to the base member 23A, electrically connecting to the power substrate 23.

[0039] Furthermore, the method is not limited to brazing, and welding (thermal caulking), TIG welding, press bonding, etc. may also be used.

[0040] In this embodiment, the lead wire (coil input terminal) 8A of the coil is treated as a part of the coil and is simply referred to as the coil in the description.

[0041] On the power supply substrate 23, a switching element 101, a capacitor 102, a power supply terminal 103, a magnetic sensor 104, an inter-substrate connector 105, and an FS relay / power supply filter choke 106 are arranged (see Figure 5 ) etc. These electrical and electronic components constitute a power supply circuit (power conversion circuit). The switching element 101 converts a DC power supply into a three-phase AC power supply. The capacitor 102 is composed of an aluminum electrolytic capacitor, etc., and suppresses voltage fluctuations such as switching noise by charging and discharging. The power supply terminal 103 is a terminal for connecting an external power supply. The magnetic sensor 104 is a sensor for detecting the rotation angle of the motor. The inter-substrate connector 105 is a circuit component that makes an electrical connection with the control substrate 25. The FS relay in the FS relay / power filter choke 106 is a circuit component that cuts off the current flowing through the motor in the event of a fault, and the power filter choke is a circuit component that suppresses the propagation of switching noise.

[0042] Figure 4 It is a plan view showing the switching element mounting surface of the power supply substrate 23 .

[0043] In this embodiment, the motor unit 8 includes two systems of coils and a drive circuit including a switching element 101, a capacitor 102, and a power supply terminal 103. When the two systems need to be distinguished, the components are numbered as "first" and "second" in the description.

[0044] O is the position opposite the center of the motor's rotating shaft (axial center). In this embodiment, the first and second systems are arranged to be separated to the left and right of line L23, which passes through the axial center position O and is parallel to the component mounting surface of substrate 23. The left side of line L23 is referred to as the first system, and the right side is referred to as the second system.

[0045] The power supply substrate component 23A of the power supply substrate (inverter substrate, power conversion substrate) 23 has: a first insertion hole portion R1A, which has multiple holes (through holes, coil lead wire insertion holes) 23Aa-1U, 23Aa-1V, 23Aa-1W for the coil lead wire 8A of the first system (on the powered side) to be inserted; a second insertion hole portion R2A, which has multiple holes (through holes, coil lead wire insertion holes) 23Aa-2U, 23Aa-2V, 23Aa-2W for the coil lead wire 8A of the second system (on the powered side) to be inserted.

[0046] A control board 25 is provided on the upper side of the power board 23 (on the side opposite to the base 21). The power board 23 and the control board 25 are electrically connected via inter-board connectors 105 and 202. To this end, the inter-board connector 105 is provided on the power board 23, and the inter-board connector 202 is provided on the control board 25. Furthermore, the control board 25 is provided with an integrated circuit 201 for calculating control signals for controlling the motor.

[0047] The first insertion holes R1A and the second insertion holes R2A are uniformly arranged on the same side of the power substrate 23 relative to the axial center position O along the straight line L23. That is, the first insertion holes R1A and the second insertion holes R2A are clustered together on the same side relative to the axial center position O along the straight line L23. In this case, the first insertion holes R1A and the second insertion holes R2A are arranged on the outer periphery of the power substrate 23. The six holes, consisting of the first holes 23Aa-1U, 23Aa-1V, and 23Aa-1W of the first system and the second holes 23Aa-2U, 23Aa-2V, and 23Aa-2W of the second system, are arranged at equal intervals. In this embodiment, the six holes are arranged in an arc shape, but they can also be arranged in a straight line.

[0048] The first coil lead wires 8A-1U, 8A-1V, and 8A-1W are mounted on the power supply substrate 23 (see Figure 7), the first switching element 101-1, the first capacitor 102-1 and the first power terminal 103-1, the first insertion hole portion R1A for connecting the first coil lead wires 8A-1U, 8A-1V, and 8A-1W, the first switching element mounting portion R1B for configuring the first switching element 101-1, the first capacitor mounting portion R1C for configuring the first capacitor 102-1, and the first power terminal mounting portion R1D for configuring the first power terminal 103-1 are arranged along an L-shaped straight line segment L1 from the first insertion hole portion R1A side toward the first power terminal mounting portion R1D side, in the order of the first insertion hole portion R1A, the first switching element mounting portion R1B, the first capacitor mounting portion R1C, and the first power terminal mounting portion R1D.

[0049] In addition, the second coil lead wires 8A-2U, 8A-2V, and 8A-2W (see Figure 7 ), the second switching element 101-2, the second capacitor 102-2 and the second power terminal 103-2, the second insertion hole portion R2A for connecting the second coil lead wires 8A-2U, 8A-2V, and 8A-2W, the second switching element mounting portion R2B for configuring the second switching element 101-2, the second capacitor mounting portion R2C for configuring the second capacitor 102-2, and the second power terminal mounting portion R2D for configuring the second power terminal 103-2 are arranged along the L-shaped straight line segment L2, from the second insertion hole portion R2A side toward the second power terminal mounting portion R2D side, in the order of the second insertion hole portion R2A, the second switching element mounting portion R2B, the second capacitor mounting portion R2C and the second power terminal mounting portion R2D.

[0050] The first insertion hole portion R1A, the first switching element mounting portion R1B, the first capacitor mounting portion R1C and the first power terminal mounting portion R1D in the first system and the second insertion hole portion R2A, the second switching element mounting portion R2B, the second capacitor mounting portion R2C and the second power terminal mounting portion R2D in the second system are arranged line symmetrically with respect to the straight line L23.

[0051] The magnetic sensor 104 is arranged at the axial center position O. The inter-board connector 105 is arranged on the opposite side of the first insertion hole R1A and the second insertion hole R2A across the axial center position O. Therefore, the magnetic sensor 104 is arranged between the first and second insertion holes R1A, R2A and the inter-board connector mounting portion R3.

[0052] By arranging the first coil lead wires 8A-1U, 8A-1V, and 8A-1W of the two systems and the second coil lead wires 8A-2U, 8A-2V, and 8A-2W in the same row, it is possible to improve installation efficiency and reduce board size by miniaturizing the assembly equipment and improving wiring efficiency. Furthermore, by arranging the first coil lead wires 8A-1U, 8A-1V, and 8A-1W of the two systems and the second coil lead wires 8A-2U, 8A-2V, and 8A-2W in the same row, it is possible to optimize the arrangement of the switching element 101 and the capacitor 102, thereby miniaturizing the product.

[0053] Figure 5 It is a perspective view including a cross section showing a state where the power supply board 23 is assembled on the base 21 .

[0054] To shorten wiring, it is preferable to place the first coil lead wires 8A-1U, 8A-1V, and 8A-1W in close proximity to the first switching element 101-1, and to place the second coil lead wires 8A-2U, 8A-2V, and 8A-2W in close proximity to the second switching element 101-2. Furthermore, since the first switching element 101-1 and the second switching element 101-2 are heat-generating elements, it is preferable that the back surfaces (opposite to the heat-generating element mounting surfaces) of the first and second switch element mounting portions R1B and R2B of the power substrate 23 contact the base 21 to improve heat dissipation from the power substrate 23 to the base 21.

[0055] Therefore, in this embodiment, if Figure 2 and Figure 5 As shown, a protrusion 21D is provided on the base 21, protruding toward the power substrate 23, with the upper end surface of the protrusion 21D contacting the back surface of the power substrate 23. In this case, no components can be mounted on the back surface of the first switching element mounting portion R1B and the second switching element mounting portion R2B of the power substrate 23.

[0056] Therefore, in this embodiment, by arranging the first coil lead wires 8A-1U, 8A-1V, and 8A-1W and the second coil lead wires 8A-2U, 8A-2V, and 8A-2W in the same column, the first and second switching elements 101-1 and 101-2 are arranged in a concentrated manner. That is, the first and second switching elements 101-1 and 101-2 are mounted in a single location on the upper surface of the power substrate 23. If the first and second switching element mounting portions R1B and R2B are arranged separately, the area of the protrusion 21D increases, reducing the component mounting surface on the back side of the power substrate 23. In this embodiment, the protrusion 21D, which abuts the back sides of the first and second switching element mounting portions R1B and R2B on the power substrate 23, can be compactly concentrated, reducing the space lost by the protrusion 21D. Furthermore, when the first switching element mounting portion R1B and the second switching element mounting portion R2B are arranged separately, the dividing protrusion 21D divides the component mounting surface on the back side of the power substrate 23, reducing component mounting efficiency. In this embodiment, this division of the component mounting surface is prevented. Consequently, in this embodiment, component mounting efficiency on the back side of the power substrate 23 is improved.

[0057] In this embodiment, high-heat-generating components such as the switching element 101 are mounted on the upper surface of the power substrate 23, and low-heat-generating components such as the FS relay / power filter choke 106 are mounted on the lower surface of the power substrate 23. Only components that require cooling are mounted on the upper surface, thereby improving the substrate installation efficiency.

[0058] Furthermore, by not mounting electronic components on the back side of the switching element 101, the base (frame) 21 can be in contact with the power substrate 23, improving cooling. By consolidating the switching elements (MOSFETs) 101, the cooling unit of the aluminum housing structure of the base (frame) 21 can be simplified, thereby reducing product size.

[0059] In addition, the base 21 is fixed to the motor housing (not shown) by bolts (not shown). For this purpose, a plurality of bolt insertion holes 21A for inserting bolts are provided on the outer periphery of the motor housing side of the base 21. In addition, as mentioned above, the base 21 also serves as a component of a heat dissipation device for dissipating heat generated by the switching element 101 and the like of the power substrate 23. For this purpose, a protrusion 21D is provided on the base 21. That is, the base 21 has a first protrusion 21D, which contacts a portion of the back surface of the power substrate 23 that is located directly below the mounting portion for mounting high-heat-generating components including the switching element 101. In order to ensure contact between the power substrate 23 and the protrusion 21D, a plurality of power substrate fixing portions 21B (see FIG. 21B ) for fixing the power substrate 23 are provided next to the protrusion 21D in the base 21. Figure 3The power board 23 is screwed to the power board fixing portion 21B by inserting screws (not shown) through the through holes 23Ab.

[0060] Furthermore, the control board 25 is screwed to a fixing portion (control board fixing portion) 21Ca provided on the base 21 by inserting screws (not shown) through through-holes 25Aa. Since the control boards 25 are stacked separately on the upper side of the power board 23, the control board fixing portion 21Ca is provided on the upper end surface of the columnar portion 21C, which extends to a position higher than the upper end surface of the protrusion 21D, so as to be located higher than the power board fixing portion 21B.

[0061] Figure 6A This is a perspective view showing a structure for preventing deflection of a power supply substrate. Figure 6B This is a perspective view of a power supply board showing the arrangement of the deflection prevention structure and the load input position in the analysis of the deflection amount. Figure 6C This is a perspective view of a power supply board showing the analysis results of the deflection amount when a deflection prevention structure is provided.

[0062] Figure 6D This is a perspective view of a power supply board showing the analysis results of the deflection amount when there is no deflection prevention structure.

[0063] In this embodiment, electronic components and power terminals 103 are symmetrically arranged on the mounting surface perpendicular to line L23 from the axial center position O of the power substrate 23, with the back surfaces of the first power terminal mounting portion R1D and the second power terminal mounting portion R2D of the power substrate 23 in contact with the base (frame) 21. Specifically, first power terminals 101-1 and second power terminals 101-2 are symmetrically arranged with respect to line L23, which passes through the axial center position O of the power substrate 23 and is parallel to the substrate surface of the power substrate 23. The back surfaces of the first and second power terminal mounting portions R1D and R1D of the power substrate 23 are in contact with the base 21 supporting the power substrate 23. To achieve this, the base 21 is provided with protrusions 21F that contact the back surfaces of the first and second power terminal mounting portions R1D and R2D of the power substrate 23.

[0064] That is, the base 21 has a second protrusion 21F that contacts a portion of the back side of the power substrate 23 that is located directly below the mounting portion for installing the first power terminal (the power terminal of the first system), and a third protrusion 21F that contacts a portion that is located directly below the mounting portion for installing the first power terminal (the power terminal of the second system).

[0065] The terminal on the external power supply side is inserted strongly downward from above into the power terminal 103. The power board 23 receives this strong force through the power terminal 103 and is deformed. Figure 6C The structure with the protrusion 21F is Figure 6D Compared with the structure in which the projection 21F is not provided, the amount of deformation of the power supply substrate 23 during the connection of the external power supply terminal is suppressed.

[0066] In this embodiment, by positioning the power terminal 103 away from the motor center (i.e., shaft center position O), a substrate deflection prevention structure (protrusion 21F) can be provided on the outer periphery of the power substrate 23, thereby reducing deflection (deformation) of the power substrate 23. This eliminates the need for screw fixation near the power terminal 103, improving the efficiency of mounting the power substrate 23. Furthermore, since the magnetic sensor (rotation angle sensor) 104 is mounted on the power substrate 23 at shaft center position O, a substrate deflection prevention structure cannot be provided.

[0067] Furthermore, in this embodiment, for the same purpose as the protrusion 21F, a protrusion 21E is provided on the back side of the inter-board connector mounting portion R3 where the inter-board connector 105 is located. Specifically, the base 21 includes a fourth protrusion that contacts a portion of the back side of the power board 23 located directly below the mounting portion where the inter-board connector 105 is mounted.

[0068] Figure 7 This is a conceptual diagram explaining the end processing of the coil wire. Figure 8 It is a figure which shows the comb jig used for processing the end of a coil wire.

[0069] The coil wires of the two systems are collectively wired for each system and straightened inside the motor so that the ends of the coil wires are aligned and straight. This allows the insertion holes 23Aa on the power board 23 to be concentrated, and the product size can be reduced.

[0070] When the coil wire is straightened inside the motor and then pulled toward the power board 23, the coil wire's dimensional accuracy deteriorates due to the reaction force, making connection to the power board 23 difficult. Therefore, by using comb-tooth clamps 50A and 50B to secure the coil wire's position, the straightened coil wire can be inserted into the insertion hole 23Aa of the power board 23 even after it has been straightened inside the motor. Furthermore, a component other than the comb-tooth clamps that provides coil guidance can be attached to the motor housing.

[0071] In an embodiment of the present invention, the following assembly method may be implemented as an assembly method of an electronic control device.

[0072] A method for assembling an electronic control device 9, the electronic control device 9 comprising:

[0073] The power supply substrate 23 has a first insertion hole portion R1A having a plurality of holes 23Aa-1U, 23Aa-1V, and 23Aa-1W through which the coil wires 8A-1U, 8A-1V, and 8A-1W of the first system are inserted, and a second insertion hole portion R2A having a plurality of holes 23Aa-2U, 23Aa-2V, and 23Aa-2W through which the coil wires 8A-2U, 8A-2V, and 8A-2W of the second system are inserted.

[0074] a control substrate 25 disposed on an upper portion of the power substrate 23; and

[0075] The inter-substrate connector 105 electrically connects the power substrate 23 and the control substrate 25.

[0076] The first insertion hole portion R1A and the second insertion hole portion R2A are uniformly arranged on the same side of the power substrate 23.

[0077] The coil wires 8A-1U, 8A-1V, 8A-1W, 8A-2U, 8A-2V, and 8A-2W of the two systems are centrally wired for each system and corrected inside the motor so that the terminals of the coil wires 8A-1U, 8A-1V, 8A-1W, 8A-2U, 8A-2V, and 8A-2W are in the same straight line. They are then inserted into the multiple holes 23Aa-1U, 23Aa-1V, and 23Aa-1W of the first insertion hole portion R1A and the multiple holes 23Aa-2U, 23Aa-2V, and 23Aa-2W of the second insertion hole portion R2A for assembly.

[0078] In addition, the present invention is not limited to the above-described embodiment, and includes various modifications.

[0079] For example, the above-mentioned embodiments are described in detail to explain the present invention in an easy-to-understand manner, and are not limited to necessarily having all the configurations. In addition, part of the configuration of the embodiments can be replaced with other configurations, and other configurations can be added to part of the configuration of the embodiments.

[0080] Description of Reference Numerals

[0081] 1…Power steering

[0082] 8A-1U, 8A-1V, 8A-1W…Coil wires for the first system (coil lead wires)

[0083] 8A-2U, 8A-2V, 8A-2W… Second system coil wire (coil lead wire)

[0084] 9…Electronic control unit

[0085] 23…Power supply board

[0086] 23Aa-1U, 23Aa-1V, 23Aa-1W…Coil wire insertion holes for the first system

[0087] 23Aa-2U, 23Aa-2V, 23Aa-2W…Second system coil wire insertion hole

[0088] 25…Control board

[0089] 105…Inter-substrate connector

[0090] R1A…First insertion hole

[0091] R2A...second insertion hole.

Claims

1. An electronic control device, characterized in that: have: a power supply substrate having a first insertion hole portion having a plurality of holes for inserting the coil wires of the first system, and a second insertion hole portion having a plurality of holes for inserting the coil wires of the second system; a control substrate, which is disposed on an upper portion of the power substrate and is electrically connected to the power substrate; and A metal base to which the power supply substrate and the control substrate are fixed. The first insertion hole portion and the second insertion hole portion are uniformly arranged on the same side of the power substrate, The power substrate includes an inter-substrate connector for electrically connecting to the control substrate. The inter-board connector is provided on the opposite side of the first insertion hole and the second insertion hole across the center of the control board. The electronic control device includes a first system switching element, a second system switching element, a first system capacitor, a second system capacitor, a first system power supply terminal, and a second system power supply terminal. The coil wire of the first system, the switching element of the first system, the capacitor of the first system, and the power supply terminal of the first system are sequentially mounted on the power supply substrate. The coil wire of the second system, the switching element of the second system, the capacitor of the second system, and the power supply terminal of the second system are sequentially mounted on the power supply substrate. The base has a second protrusion and a third protrusion, the second protrusion contacts a portion of the back side of the power substrate located directly below the mounting portion for mounting the power terminals of the first system, and the third protrusion contacts a portion located directly below the mounting portion for mounting the power terminals of the second system.

2. The electronic control device according to claim 1, characterized in that The electronic control device is equipped with an FS relay and a power filter choke. High-heat-generating components including the switching element are arranged on the upper surface side of the power substrate, and low-heat-generating components are arranged on the lower surface side of the power substrate.

3. The electronic control device according to claim 2, characterized in that The low-heat-generating component is the FS relay and / or the power supply filter choke.

4. The electronic control device according to claim 1, characterized in that The base has a first protrusion that contacts a portion of the back surface of the power substrate that is located immediately below a mounting portion where a high-heat-generating component including the switching element is mounted.

5. The electronic control device according to claim 1, characterized in that On a mounting surface in a direction perpendicular to a straight line passing through the axial center position of the power substrate and parallel to the substrate surface of the power substrate and parallel to the substrate surface, the power terminals of the first system and the power terminals of the second system are arranged symmetrically with respect to the straight line, so that the mounting surface of the power terminals of the first system and the back side of the mounting surface of the power terminals of the second system in the power substrate are in contact with a base supporting the power substrate.

6. The electronic control device according to claim 1, characterized in that The base has a fourth protrusion that contacts a portion of the rear surface of the power board that is located immediately below a mounting portion on which the inter-board connector is mounted.

7. The electronic control device according to any one of claims 1 to 6, characterized in that: The electronic control device includes a magnetic sensor mounted between the first and second insertion holes and a mounting portion of the inter-board connector.

8. A method for assembling an electronic control device, characterized in that: The electronic control device comprises: a power supply substrate having a first insertion hole portion having a plurality of holes for inserting the coil wires of the first system, and a second insertion hole portion having a plurality of holes for inserting the coil wires of the second system; a control substrate, which is arranged on an upper portion of the power substrate; an inter-substrate connector that electrically connects the power substrate and the control substrate; and A metal base to which the power supply substrate and the control substrate are fixed. The first insertion hole portion and the second insertion hole portion are uniformly arranged on the same side of the power substrate, The power substrate includes an inter-substrate connector for electrically connecting to the control substrate. The inter-board connector is provided on the opposite side of the first insertion hole and the second insertion hole across the center of the control board. The electronic control device includes a first system switching element, a second system switching element, a first system capacitor, a second system capacitor, a first system power supply terminal, and a second system power supply terminal. The coil wire of the first system, the switching element of the first system, the capacitor of the first system, and the power supply terminal of the first system are sequentially mounted on the power supply substrate. The coil wire of the second system, the switching element of the second system, the capacitor of the second system, and the power supply terminal of the second system are sequentially mounted on the power supply substrate. The base has a second protrusion and a third protrusion, the second protrusion contacts a portion of the back surface of the power substrate directly below the mounting portion for mounting the power terminals of the first system, and the third protrusion contacts a portion directly below the mounting portion for mounting the power terminals of the second system. The coil wires of the two systems are collectively wired for each system, straightened inside the motor so that the ends of the coil wires are aligned and straight, and then inserted into the multiple holes of the first insertion hole portion and the multiple holes of the second insertion hole portion for assembly.

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