Motor control device

Abstract

To provide a motor control device in which an arrangement space of a through hole group for signal terminals can be ensured while the wiring efficiency is improved.SOLUTION: An ECU (1) which is a motor control device includes a control substrate (20), a plurality of power source terminals, a plurality of first signal terminals, and a plurality of second signal terminals. The control substrate (20) includes a control circuit (200), a driving circuit (210), a first through hole group (21G) that is electrically connected to the plurality of power source terminals, a second through hole group (22G) that is electrically connected to the plurality of first signal terminals, and a third through hole group (23G) that is electrically connected to the plurality of second signal terminals. The first through hole group (21G) is disposed between the second through hole group (22G) and the third through hole group (23G) in a second direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a motor control device for controlling the driving of a motor. [Background technology]

[0002] Conventionally, there are motor control devices in which a drive circuit for driving a motor and a control circuit for controlling the drive circuit are arranged on a single control board. For example, Patent Document 1 discloses a motor control device that includes a control board on which a control circuit and a drive circuit are mounted, and a connector that houses power terminals and signal terminals.

[0003] In the motor control device of Patent Document 1, a group of through holes for signal terminals to be connected to signal terminals and a group of through holes for power supply terminals to be connected to power supply terminals are formed on the longitudinal end side of the control board. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2014 / 162738 Summary of the Invention [Problem to be solved by the invention]

[0005] 7, in order to pass a large current through the drive circuit 210A in the control board 20A of the motor control device 1A described in Patent Document 1, it is conceivable to arrange the power supply terminal through-hole group 21AG near the drive circuit 210A and connect the power supply terminal through-hole 21A and the drive circuit 210A with a wide wiring pattern P1A. In this case, the distance L1 between the control circuit 200A and the power supply terminal through-hole 21A becomes long, which causes a problem of reduced wiring efficiency.

[0006] 8, in a control board 20B of a motor control device 1B as disclosed in Patent Document 1, if the power supply terminal through-hole group 21BG is located close to the control circuit 200B and the power supply terminal through-hole 21B and the drive circuit 210B are connected by a wiring pattern P1B, the distance L2 between the control circuit 200B and the power supply terminal through-hole 21B is shortened, thereby improving wiring efficiency. However, there is a problem in that the space for arranging the signal terminal through-hole group 22BG is narrower than the signal terminal through-hole group 22AG in FIG.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a motor control device that can improve wiring efficiency while ensuring sufficient space for arranging a group of through holes for signal terminals. [Means for solving the problem]

[0008] In order to solve the above problems, a motor control device according to one embodiment of the present invention includes a control board for driving a motor, a plurality of power supply terminals for supplying power to the control board, and a plurality of first signal terminals and a plurality of second signal terminals for supplying control signals to the control board to control the driving of the motor.

[0009] The control board includes a control circuit that outputs a drive signal for controlling the motor based on the control signal input from the first signal terminal and the second signal terminal, a drive circuit that supplies power to the motor via the power supply terminal based on the drive signal output from the control circuit, a first through-hole group disposed on an end of the control board in the first direction and electrically connected to the power supply terminals by inserting the plurality of power supply terminals therethrough, a second through-hole group disposed on the end of the control board in the first direction and electrically connected to the plurality of first signal terminals by inserting the plurality of first signal terminals therethrough, and a third through-hole group disposed on the end of the control board in the first direction and electrically connected to the plurality of second signal terminals by inserting the plurality of second signal terminals therethrough. The first through-hole group is disposed between the second through-hole group and the third through-hole group in a second direction intersecting the first direction. A first wiring pattern connecting the control circuit and the third through-hole group is disposed so as to pass outside the first through-hole group of the control board in the first direction. [Effects of the Invention]

[0010] According to one aspect of the present invention, it is possible to realize a motor control device that can improve wiring efficiency while ensuring sufficient space for arranging a group of through holes for signal terminals. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a block diagram showing a configuration of an electric power steering system including an ECU according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an exploded perspective view showing the component configuration of the ECU in FIG. 1. [Figure 3] FIG. 3 is a plan view of a control board of the ECU of FIG. 2. [Figure 4] FIG. 3 is a plan view of the connector of the ECU in FIG. 2. [Figure 5] 4 is an enlarged schematic diagram of the wiring pattern of the control board of FIG. 3. [Figure 6] 4 is a schematic diagram showing an example of a cross-sectional structure of the control board of FIG. 3. [Figure 7] FIG. 10 is a plan view of an example of a control board of a conventional motor control device. [Figure 8] FIG. 10 is a plan view of another example of a control board of a conventional motor control device. DETAILED DESCRIPTION OF THE INVENTION

[0012] A motor control device according to one embodiment of the present invention will be described below with reference to Figures 1 to 6. In this embodiment, a case will be described in which the motor control device of the present invention is applied to an ECU (Electronic Control Unit) 1 of an electric power steering system 100.

[0013] [Electric power steering system configuration] 1 is a block diagram showing the configuration of an electric power steering system 100 equipped with an ECU 1 according to this embodiment. As shown in FIG. 1, the electric power steering system 100 includes the ECU 1, a power supply 60, a torque sensor 70, a motor 80, and an angle sensor 90.

[0014] The electric power steering system 100 applies the force obtained by rotating the motor 80 via a speed reducer (not shown) to a steering shaft fixed to the steering wheel by controlling the driving of the motor 80 using the ECU 1. This system assists the driver in steering. The electric power steering system 100 can also suppress vibrations of the steering wheel caused by external forces acting on the wheels of the vehicle (not shown).

[0015] The ECU 1 has a power supply control unit 201, an ignition (IGN) voltage monitor circuit 202, a CAN (Controller Area Network) input / output circuit 203, a torque sensor input circuit 204, a control unit 205, an inverter drive unit 206, a current sensor input circuit 207, an angle sensor input / output circuit 208, a drive circuit 210, and a current sensor 211.

[0016] A power supply 60, a torque sensor 70, a CAN line CL, a motor 80, an angle sensor 90, etc. are electrically connected to the ECU 1. The motor 80 is, for example, a three-phase (U-phase, V-phase, W-phase) internal permanent magnet (IPM) synchronous motor.

[0017] The interior permanent magnet synchronous motor includes a three-phase stator coil and a rotor with embedded permanent magnets. The rotating shaft of the motor 80 is connected to the steering shaft via a reduction gear mechanism (not shown). The motor 80 is integrated with the ECU 1.

[0018] Power is supplied to the power supply control unit 201 from the power supply 60 via the power supply terminal 51. An ignition signal IGN is also input to the power supply control unit 201 via a second signal terminal 53. The power supply control unit 201 is activated upon receiving the ignition signal IGN, converts the DC voltage V supplied from the power supply 60 into a predetermined voltage, and supplies the converted voltage to the control unit 205 as a drive power source.

[0019] The IGN voltage monitor circuit 202 converts the ignition signal IGN, which is proportional to the ignition voltage (IGN voltage) input via the second signal terminal 53, into a signal that can be read by the control unit 205, and removes noise by filtering. The IGN voltage monitor circuit 202 outputs the converted signal to the control unit 205.

[0020] The CAN input / output circuit 203 is connected to the CAN line CL via the second signal terminal 53. The CAN line CL is a signal line used for CAN communication. The CAN input / output circuit 203 converts the CAN signal transmitted via the CAN line CL into a voltage that can be read by the control unit 205, and also converts the signal output by the control unit 205 into a CAN signal.

[0021] For example, a vehicle speed signal v corresponding to a vehicle speed detected by a vehicle speed sensor (not shown) is input as a CAN signal to the CAN input / output circuit 203. The CAN input / output circuit 203 outputs a CAN signal including the vehicle speed signal v to the control unit 205.

[0022] A torque signal Tr corresponding to the steering torque detected by the torque sensor 70 provided on the steering shaft is input to the torque sensor input circuit 204. The steering torque is torque generated on the steering shaft based on the driver's operation of the steering wheel. The torque sensor input circuit 204 filters the torque signal Tr to remove noise, and then outputs the signal to the control unit 205.

[0023] The control unit 205 is formed by, for example, a CPU (Central Processing Unit). The control unit 205 controls the inverter driving unit 206 based on the detection results of the torque sensor 70, the angle sensor 90, etc. The inverter driving unit 206 controls the driving of the drive circuit 210 by a PWM (Pulse Width Modulation) signal.

[0024] The drive circuit 210 is a well-known inverter circuit, and is configured such that pairs of semiconductor switching elements connected in series are connected in parallel, for example, three of them. Each semiconductor switching element is, for example, a MOSFET (metal oxide semiconductor field effect transistor). Each pair of semiconductor switching elements is connected to the U-phase, V-phase, and W-phase of the motor 80 via output terminals 42, respectively.

[0025] The drive circuit 210 is connected to a power supply 60 via a power supply terminal 51 and is also grounded. The power supply 60 supplies DC power to the drive circuit 210 via wiring patterns P1 and P2, which will be described later. The power supply 60 is, for example, a secondary battery.

[0026] In the drive circuit 210, current detectors (not shown) are provided between the downstream semiconductor switching element, which is a semiconductor switching element provided on the low potential side, and ground, so as to correspond to the U phase, V phase, and W phase of the motor 80. For ease of explanation, in Fig. 1, the three current detectors are collectively referred to as current sensor 211.

[0027] The current sensor 211 detects a current value Iu flowing through the U phase of the motor 80, a current value Iv flowing through the V phase of the motor 80, and a current value Iw flowing through the W phase of the motor 80. The current sensor 211 outputs current signals corresponding to the detected current values ​​Iu, Iv, and Iw to the current sensor input circuit 207.

[0028] The current sensor input circuit 207 amplifies the current signals from the current sensors 211 and filters them to remove noise, and then outputs each current signal to the control unit 205 .

[0029] The angle sensor 90 is provided on the motor 80 and detects the rotation angle of the rotary shaft of the motor 80. The angle sensor 90 outputs an angle signal θ corresponding to the detected rotation angle to the angle sensor input / output circuit 208 via the first signal terminal 52.

[0030] The angle sensor input / output circuit 208 amplifies the angle signal θ from the angle sensor 90, filters it to remove noise, and then outputs it to the control unit 205. The angle sensor input / output circuit 208 also supplies a drive voltage to the angle sensor 90.

[0031] The control unit 205 controls the drive circuit 210 based on the torque signal Tr, the vehicle speed signal v, the angle signal θ, etc. via the inverter drive unit 206. The drive circuit 210 controls the drive of the motor 80 based on the drive signal from the inverter drive unit 206.

[0032] [ECU component configuration] FIG. 2 is an exploded perspective view showing the configuration of the ECU 1 according to this embodiment. As shown in FIG. 2, the ECU 1 includes a cover 10, a control board 20, a holding member 30, an output connector 40, and a connector 50. For ease of explanation, the up-down direction, the front-rear direction, and the left-right direction of the ECU 1 are defined as indicated by the arrows in FIG. 2. Note that the up-down direction, the front-rear direction, and the left-right direction are names used for convenience and do not define the manner in which the ECU 1 is used. The left-right direction can be referred to as the X-axis direction, the front-rear direction as the Y-axis direction, and the up-down direction as the Z-axis direction.

[0033] The cover 10 is disposed so as to cover the upper side of the control board 20, and is a member that holds the control board 20. The control board 20 is a device for driving the motor 80. The control board 20 has a plurality of first through holes 21, a plurality of second through holes 22, a plurality of third through holes 23, a plurality of fourth through holes 24, and a plurality of fifth through holes 25 formed therein.

[0034] The first through holes 21, the second through holes 22, and the third through holes 23 are arranged on the right end side of the control board 20. The fourth through holes 24 are arranged at the left front and left rear corners of the control board 20 and on the right side of the center of the control board 20. The fifth through holes 25 are arranged on the front side of the control board 20.

[0035] The control board 20 is attached to the holding member 30 by inserting screws 26 into the plurality of fourth through holes 24. The power terminal 51 of the connector 50 is inserted into the first through hole 21 of the control board 20, thereby electrically connecting the control board 20 and the power terminal 51.

[0036] Furthermore, the first signal terminal 52 of the connector 50 is inserted into the second through-hole 22 of the control board 20, thereby electrically connecting the control board 20 and the first signal terminal 52. Furthermore, the second signal terminal 53 of the connector 50 is inserted into the third through-hole 23 of the control board 20, thereby electrically connecting the control board 20 and the second signal terminal 53. Furthermore, the plurality of output terminals 42 of the output connector 40 are inserted into the plurality of fifth through-holes 25 of the control board 20, thereby electrically connecting the control board 20 and the output terminal 42.

[0037] The holding member 30 is a housing that is disposed below the control board 20 and that holds the control board 20. The holding member 30 has a heat sink 31. The heat sink 31 is disposed at a position corresponding to the drive circuit 210 of the control board 20 and is a member that absorbs heat generated from the control board 20 and the like.

[0038] The connector 50 is attached to the right side of the lower surface of the holding member 30 with a screw 33. Although not shown, the right end of the holding member 30 is formed with a plurality of through holes through which the power terminal 51, the first signal terminal 52, and the second signal terminal 53 of the connector 50 can be inserted, respectively.

[0039] An output connector 40 is disposed on the left front surface of the holding member 30. The output connector 40 is a member for connecting the motor 80 to downstream semiconductor switching elements in the drive circuit 210 of the control board 20. The output connector 40 has a plurality of output terminals 42 for supplying the power output from the control board 20 to the motor 80. The plurality of output terminals 42 correspond to each phase of the motor 80.

[0040] The output connector 40 is provided with two through holes 41 for inserting a plurality of screws, in this case two screws 43. The output connector 40 is attached to the holding member 30 by inserting the screws 43 into the two through holes 41, respectively.

[0041] A connector 50 is disposed below the holding member 30. The connector 50 has a first connector portion 51A, a second connector portion 52A, and a third connector portion 53A. A plurality of power supply terminals 51 are housed in the first connector portion 51A. A plurality of first signal terminals 52 are housed in the second connector portion 52A. A plurality of second signal terminals 53 are housed in the third connector portion 53A.

[0042] [Control board configuration] FIG. 3 is a plan view of the control board 20 of the ECU 1. As shown in FIG. 3, the control board 20 includes a control circuit 200, a drive circuit 210, a wiring pattern S1 (first wiring pattern), a wiring pattern S2 (second wiring pattern), a wiring pattern P1, and a wiring pattern P2. In FIG. 3, the left-right direction is referred to as the longitudinal direction, which is the direction along the long sides of the control board 20. The front-rear direction is referred to as the lateral direction, which is the direction along the short sides of the control board 20. The long sides and short sides of the control board 20 are not limited to the relationship shown in FIG. 3. In FIG. 3, the left-right direction may be referred to as the short sides, and the front-rear direction may be referred to as the long sides. The control board 20 may also be a square with four sides of equal lengths.

[0043] The control board 20 has a rectangular outer shape. The drive circuit 210 and the control circuit 200 are arranged side by side in this order along the short side direction (second direction) of the control board 20. That is, on the control board 20, the control circuit 200 is arranged on the rear side of the drive circuit 210. The drive circuit 210 is arranged in a position closer to the fifth through-hole 25, which connects to the output terminal 42 of the output connector 40, than the control circuit 200. As will be described later, the drive circuit 210 handles a large amount of power to be supplied to the motor 80, so by arranging it closer to the output terminal 42, power loss can be suppressed.

[0044] The control circuit 200 outputs drive signals for controlling a plurality of semiconductor switching elements of the drive circuit 210 based on control signals input from the first signal terminal 52 and the second signal terminal 53. The drive circuit 210 supplies power to the U-phase, V-phase, and W-phase of the motor 80 based on the drive signals output from the control circuit 200.

[0045] A first through-hole group 21G, a second through-hole group 22G, and a third through-hole group 23G are formed in a region on one end side (the right end side in FIG. 3) in the longitudinal direction (first direction) of the control board 20. The first through-hole group 21G is disposed between the second through-hole group 22G and the third through-hole group 23G in the short-side direction of the control board 20.

[0046] Specifically, the first through-hole group 21G is arranged in a region near the right side of the drive circuit 210, at a position closer to the control circuit 200 than the distance between the third through-hole group 23G and the control circuit 200, and is connected to the control circuit 200 via the wiring pattern P1. This shortens the length of the wiring pattern P1, improving wiring efficiency and allowing a large current to flow from the power supply terminal 51 to the drive circuit 210 via the wiring pattern P1. Here, a state with good wiring efficiency refers to a state in which the resistance of the current path is smaller than when each wiring pattern is unnecessarily long or when multiple wiring patterns cross each other.

[0047] The second through-hole group 22G is arranged near the right side of the control circuit 200 and is connected to the control circuit 200 via a wiring pattern S2. The third through-hole group 23G is arranged near the right side of the drive circuit 210 and is connected to the control circuit 200 via a wiring pattern S1.

[0048] The first through-hole group 21G has four first through-holes 21. Four power supply terminals 51 are inserted into the first through-holes 21. As a result, the first through-hole group 21G is electrically connected to the four power supply terminals 51. Note that the number of first through-holes 21 and power supply terminals 51 is not limited to four and can be changed as appropriate.

[0049] The second through-hole group 22G has 15 second through-holes 22. Fifteen first signal terminals 52 are inserted into the second through-holes 22. As a result, the second through-hole group 22G is electrically connected to the 15 first signal terminals 52. Note that the number of second through-holes 22 and first signal terminals 52 is not limited to 15 and can be changed as appropriate.

[0050] The third through-hole group 23G has three third through-holes 23. Three second signal terminals 53 are inserted into the third through-holes 23. As a result, the third through-hole group 23G is electrically connected to the three second signal terminals 53. Note that the number of third through-holes 23 and second signal terminals 53 is not limited to three and can be changed as appropriate.

[0051] Configure Connector Fig. 4 is a plan view of the connector 50 of the ECU 1. As shown in Fig. 4, the connector 50 has a first connector portion 51A, a second connector portion 52A, and a third connector portion 53A, which are integrated together. The first connector portion 51A is disposed between the second connector portion 52A and the third connector portion 53A in the front-rear direction of Fig. 4.

[0052] The first connector portion 51A accommodates a plurality of power supply terminals 51. The second connector portion 52A accommodates a plurality of first signal terminals 52. The third connector portion 53A accommodates a plurality of second signal terminals 53.

[0053] A power supply terminal group 51G including a plurality of power supply terminals 51 is arranged corresponding to the first through-hole group 21G of the control board 20. That is, the plurality of power supply terminals 51 are inserted into the first through-holes 21, respectively. Power is supplied to the control board 20 from a power supply 60 via the power supply terminals 51.

[0054] A first signal terminal group 52G including a plurality of first signal terminals 52 is arranged corresponding to the second through-hole group 22G of the control board 20. That is, the plurality of first signal terminals 52 are inserted into the second through-holes 22, respectively. A torque signal from the torque sensor 70, an angle signal from the angle sensor 90, etc. are input to the control circuit 200 of the control board 20 via the first signal terminals 52.

[0055] The control circuit 200 generates a drive signal for controlling the drive of the motor 80 based on the torque signal received from the torque sensor 70 and the angle signal received from the angle sensor 90. At this time, if noise is superimposed on the signal input to the control circuit 200, the accuracy of the control by the control circuit 200 may be reduced.

[0056] Therefore, in this embodiment, the second through-hole group 22G is arranged near the right side of the control circuit 200, thereby making it possible to suppress noise superposition between the control circuit 200 and the second through-hole group 22G.

[0057] A second signal terminal group 53G including a plurality of second signal terminals 53 is arranged corresponding to the third through-hole group 23G of the control board 20. That is, the plurality of second signal terminals 53 are inserted into the third through-holes 23. A CAN signal used for CAN communication, an ignition signal, and the like are input to the control circuit 200 of the control board 20 via the second signal terminals 53.

[0058] Here, the CAN signal is transmitted using a differential signal, which provides greater noise resistance than the sensor signal. Furthermore, the ignition signal has a higher noise tolerance than the sensor signal. Therefore, the third through-hole group 23G can be located farther from the control circuit 200 than the second through-hole group 22G.

[0059] The second connector portion 52A is provided with screw holes 521 for attaching the screws 33. The third connector portion 53A is provided with screw holes 531 for attaching the screws 33. By attaching the screws 33 to the screw holes 521 and 531, the connector 50 is fixed to the holding member 30.

[0060] [Wiring pattern configuration] Fig. 5 is an enlarged schematic diagram of the wiring patterns of the control board 20. As shown in Fig. 5, the control board 20 is formed with a wiring pattern P1 connected to the first through hole 21a, a wiring pattern P2 connected to the first through hole 21b, and a wiring pattern S1 connected to the third through hole 23.

[0061] The wiring pattern P1 and the wiring pattern P2 are intended to supply power from the power supply 60 to the drive circuit 210 via the power supply terminal 51, and are formed wider than the wiring pattern S1, which allows a large current to flow from the power supply 60 to the drive circuit 210 via the wiring pattern P1 and the wiring pattern P2.

[0062] The wiring pattern S1 is for transmitting signals via the second signal terminal 53, and connects the third through-hole group 23G and the control circuit 200. Specifically, the wiring pattern S1 passes outside the first through-hole group 21G in the longitudinal direction of the control board 20 (toward the right end in FIG. 5), and is connected to the control circuit 200.

[0063] A second signal terminal 53 for transmitting a CAN signal as a differential signal is inserted through the third through-hole 23a and the third through-hole 23b. Also, a second signal terminal 53 for transmitting an ignition signal IGN is inserted through the third through-hole 23c.

[0064] The length of the wiring pattern S1 is formed to be longer than the length of the wiring pattern S2 (see FIG. 3) that connects the control circuit 200 and the second through-hole group 22G. Therefore, there is a concern that noise may be superimposed on the signal transmitted by the wiring pattern S1 or on the signal transmitted by another wiring pattern.

[0065] Therefore, in this embodiment, a ground guard 27 connected to the ground is arranged around the wiring pattern S1, which makes it possible to prevent noise generated in the wiring pattern S1 from affecting signals transmitted by other wiring patterns, and to prevent noise generated outside the wiring pattern S1 from affecting signals transmitted by the wiring pattern S1.

[0066] Here, the wiring pattern P1 shown in Fig. 5 may be connected to the drive circuit 210 via a plurality of stacked wiring layers, as will be described below. Fig. 6 is a schematic diagram showing an example of the cross-sectional structure of the control board 20. As shown in Fig. 6, the control board 20 is a multilayer board in which a plurality of wiring layers L1 to L4 are stacked with a plurality of insulating layers 20A to 20C interposed therebetween. The wiring pattern S1 is formed using one or more wiring layers selected from the first wiring layer L1, the second wiring layer L2, the third wiring layer L3, and the fourth wiring layer L4.

[0067] The first wiring layer L1 is disposed on the upper surface of the first insulating layer 20A. The second wiring layer L2 is disposed on the upper surface of the second insulating layer 20B. The third wiring layer L3 is disposed on the upper surface of the third insulating layer 20C. The fourth wiring layer L4 is disposed on the lower surface of the third insulating layer 20C.

[0068] The first insulating layer 20A, the second insulating layer 20B, and the third insulating layer 20C are made of a base material including glass epoxy, polyimide, or the like. A resist 20D is disposed on the upper surface of the first wiring layer L1. A resist 20E is disposed on the lower surface of the fourth wiring layer L4. A first through-hole 23 is formed in the control board 20. Note that the up-down direction in the above description of the structure of the multilayer board indicates the relationship when the stacking direction of the control board 20 is defined as the up-down direction, and does not necessarily coincide with the up-down direction shown in FIG. 1, etc.

[0069] The various wiring patterns formed on the control board 20 made of such a multilayer board may be formed in one wiring layer of the plurality of wiring layers L1 to L4, or may be formed using two or more wiring layers. For example, the wiring pattern P1 connecting the first through hole 21a to which the power supply terminal 51 is connected and the drive circuit 210 may pass through two different wiring layers of the plurality of wiring layers L1 to L4.

[0070] The shape, size, arrangement, and number of the first wiring layer L1, second wiring layer L2, third wiring layer L3, and fourth wiring layer L4 can be changed as appropriate depending on how the wiring pattern P1 is wired.

[0071] [Effects of the embodiment] In the ECU 1 of the present embodiment described above, the first through hole group 21G, the second through hole group 22G, and the third through hole group 23G are provided at one end side in the longitudinal direction of the control board 20 (the right end side in FIG. 3), and the first through hole group 21G is disposed between the second through hole group 22G and the third through hole group 23G in the lateral direction of the control board 20. This reduces the distance between the control circuit 200 and the first through hole group 21G to which the power supply terminal 51 is connected, as shown in FIG. 3, thereby improving wiring efficiency.

[0072] Furthermore, second through-hole group 22G connected to first signal terminal 52 and third through-hole group 23G connected to second signal terminal 53 are arranged in two separate locations on either side of first through-hole group 21G in the short-side direction of control board 20. This makes it possible to ensure sufficient space for arranging second through-hole group 22G connected to first signal terminal 52 and third through-hole group 23G connected to second signal terminal 53 without increasing the area of ​​control board 20.

[0073] Furthermore, since the wiring pattern S1 is arranged to pass longitudinally outside the control board 20 beyond the first through-hole group 21G, the wiring pattern S1 does not intersect with the wiring patterns P1 and P2, thereby improving wiring efficiency.

[0074] Furthermore, the length of the wiring pattern S2 connecting the control circuit 200 and the second through-hole group 22G is shorter than the length of the wiring pattern S1. This makes it possible to prevent noise from being superimposed on the sensor signal transmitted from the first signal terminal 52 to the control circuit 200 via the second through-hole group 22G. This makes it possible to prevent a decrease in the accuracy of control by the control circuit 200.

[0075] Other Embodiments In the above embodiment, the motor control device of the present invention has been described as being applied to the ECU 1 of the electric power steering system 100, but the present invention is not limited to this and may also be applied as a motor control device in a steer-by-wire system or an autonomous driving system in which power transmission between the steering wheel and the wheels is separated.

[0076] Furthermore, in the above-described embodiment, as shown in FIG. 3, the first direction, which is the longitudinal direction, and the second direction, which is the lateral direction, intersect perpendicularly, but this is not limited thereto, and the first direction and the second direction may be different directions from each other.

[0077] Furthermore, in the above embodiment, the motor 80 is configured to be integrated with the ECU 1, but this is not limiting, and the motor 80 may be provided as a separate body from the ECU 1.

[0078] Furthermore, in the above embodiment, an interior permanent magnet synchronous motor is used as the motor 80, but the present invention is not limited to this, and for example, a synchronous reluctance motor may also be used.

[0079] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0080] 1 ECU 20 Control board 21 First through hole 21G 1st through hole group 22 Second through hole 22G 2nd through hole group 23 Third through hole 23G 3rd through hole group 50 connectors 51 Power terminal 52 1st signal terminal 53 2nd signal terminal 80 Motor 200 Control circuit 210 Drive circuit S1 wiring pattern S2 wiring pattern

Claims

1. a control board for driving the motor; a plurality of power supply terminals for supplying power to the control board; a plurality of first signal terminals and a plurality of second signal terminals for supplying control signals for controlling the driving of the motor to the control board; Equipped with The control board a control circuit that outputs a drive signal for controlling the motor based on the control signal input from the first signal terminal and the second signal terminal; a drive circuit that supplies power to the motor via the power supply terminals based on the drive signal output from the control circuit; a first through-hole group disposed on an end side of the control board in a first direction, the first through-hole group being electrically connected to the plurality of power supply terminals by inserting the plurality of power supply terminals therethrough; a second through-hole group disposed on an end side of the control board in the first direction, the second through-hole group having the first signal terminals inserted therethrough and electrically connected to the first signal terminals; a third through-hole group disposed on an end side of the control board in the first direction, the third through-hole group being electrically connected to the second signal terminals by inserting the second signal terminals therethrough; and the first through hole group is disposed between the second through hole group and the third through hole group in a second direction intersecting with the first direction, A motor control device characterized in that a first wiring pattern connecting the control circuit and the third group of through holes is arranged so as to pass outside the first group of through holes on the control board in the first direction.

2. the drive circuit and the control circuit are arranged side by side along the second direction, the first through-hole group is arranged on the first direction side of the drive circuit, the second through-hole group is arranged on the first direction side of the control circuit, The motor control device according to claim 1 , wherein the third group of through holes is arranged on the first direction side of the drive circuit.

3. The control board 3. The motor control device according to claim 1, wherein a second wiring pattern connecting the control circuit and the second group of through holes is shorter than the first wiring pattern.

4. 4. The motor control device according to claim 3, wherein a ground guard connected to ground is disposed around the first wiring pattern.

5. Equipped with multiple sensors, 5. The motor control device according to claim 1, wherein the plurality of first signal terminals connected to the second group of through holes include a signal terminal connected to a signal line for transmitting sensor signals from the plurality of sensors.

6. 6. The motor control device according to claim 1, wherein the plurality of second signal terminals connected to the third through-hole group include a signal terminal connected to a signal line used for CAN (Controller Area Network) communication.

7. 7. The motor control device according to claim 1, wherein the plurality of second signal terminals connected to the third through-hole group include a signal terminal connected to a signal line for transmitting an ignition signal.

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