JP2023136945A - motor control device - Google Patents

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

The present invention relates to a motor control device for controlling the drive of a motor.

Conventionally, some motor control devices have a drive circuit for driving a motor and a control circuit for controlling the drive circuit arranged on one 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 accommodates a power supply terminal and a signal terminal.

In the motor control device of Patent Document 1, a group of through holes for signal terminals to which signal terminals are connected and a group of through holes for power terminals to which power terminals are connected are provided on the longitudinal end side of the control board. It is formed.

International Publication No. 2014/162738

Here, as shown in FIG. 7, in the control board 20A of the motor control device 1A as in Patent Document 1, in order to flow a large current to the drive circuit 210A, a group of through holes 21AG for power supply terminals are formed in the drive circuit 210A. It is conceivable to arrange them nearby and connect the power terminal through-hole 21A and the drive circuit 210A with a wide wiring pattern P1A. In this case, there is a problem in that the distance L1 between the control circuit 200A and the power terminal through-hole 21A becomes long, resulting in a decrease in wiring efficiency.

On the other hand, as shown in FIG. 8, in a control board 20B of a motor control device 1B as disclosed in Patent Document 1, a group of through holes 21BG for power terminals are arranged near a control circuit 200B, When the hole 21B and the drive circuit 210B are connected by the wiring pattern P1B, the distance L2 between the control circuit 200B and the power terminal through hole 21B is shortened, thereby improving wiring efficiency. However, there was a problem in that the space for arranging the through hole group 22BG for signal terminals was narrower than the through hole group 22AG for signal terminals in FIG.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a motor control device that can secure a sufficient arrangement space for a group of through holes for signal terminals while improving wiring efficiency.

In order to solve the above problems, a motor control device according to one aspect 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 control board for driving a motor. and a plurality of first signal terminals and a plurality of second signal terminals for supplying control signals for controlling driving of the motor.

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, and a drive signal output from the control circuit. A drive circuit that supplies power to the motor via the power supply terminal based on the drive signal, and a drive circuit that is disposed on an end side in the first direction of the control board and through which the plurality of power supply terminals are inserted. , a first through-hole group that is electrically connected to the plurality of power supply terminals and is arranged on an end side in the first direction of the control board, and the plurality of first signal terminals are inserted therethrough; A second through-hole group electrically connected to a plurality of first signal terminals, and a second through-hole group arranged on an end side in the first direction of the control board, through which the plurality of second signal terminals are inserted. and a third through-hole group electrically connected to the plurality of second signal terminals. The first through hole group is arranged 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 group of through holes is arranged so as to pass outside the first group of through holes of the control board in the first direction.

According to one aspect of the present invention, it is possible to realize a motor control device that can secure a sufficient arrangement space for a group of through holes for signal terminals while improving wiring efficiency.

FIG. 1 is a block diagram showing the configuration of an electric power steering system including an ECU according to an embodiment of the present disclosure. FIG. 2 is an exploded perspective view showing the component configuration of the ECU shown in FIG. 1. FIG. 3 is a plan view of a control board of the ECU shown in FIG. 2. FIG. 3 is a plan view of a connector of the ECU of FIG. 2. FIG. 4 is an enlarged schematic diagram of the wiring pattern of the control board in FIG. 3. FIG. FIG. 4 is a schematic diagram showing an example of a cross-sectional structure of the control board shown in FIG. 3; 1 is an example of a plan view of a control board of a conventional motor control device. It is another example of the top view of the control board of the conventional motor control device.

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

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

The electric power steering system 100 controls the drive of the motor 80 by the ECU 1, and applies the force obtained by rotating the motor 80 to a steering shaft fixed to a steering wheel via a speed reduction mechanism (not shown). This is a system that assists the driver in steering. Note that the electric power steering system 100 can also suppress vibrations of the steering wheel caused by external forces applied to the wheels of a vehicle (not shown).

The ECU 1 includes a power supply control section 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 section 205, an inverter drive section 206, and a current control section 205. It has a sensor input circuit 207, an angle sensor input/output circuit 208, a drive circuit 210, and a current sensor 211.

A power source 60, a torque sensor 70, a CAN line CL, a motor 80, an angle sensor 90, and the like 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.

The internal permanent magnet synchronous motor includes a three-phase stator coil and a rotor in which permanent magnets are embedded. Although not shown, the rotating shaft of the motor 80 is connected to a steering shaft via a speed reduction mechanism. The motor 80 is configured to be integrated with the ECU 1.

Power is supplied to the power supply control unit 201 from the power supply 60 via the power supply terminal 51. Further, an ignition signal IGN is input to the power supply control section 201 via the 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 voltage to the control unit 205 as a driving power source.

The IGN voltage monitor circuit 202 converts an ignition signal IGN 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. . IGN voltage monitor circuit 202 outputs the converted signal to control section 205.

CAN input/output circuit 203 is connected to CAN line CL via second signal terminal 53. 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 readable by the control section 205, and also converts the signal output from the control section 205 into a CAN signal.

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

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 the torque generated on the steering shaft based on the driver's operation of the steering wheel. Torque sensor input circuit 204 filters torque signal Tr to remove noise, and then outputs it to control unit 205 .

The control unit 205 includes, for example, a CPU (Central Processing Unit). The control unit 205 controls the inverter drive unit 206 based on the detection results of the torque sensor 70, the angle sensor 90, and the like. The inverter drive unit 206 controls the drive of the drive circuit 210 using a PWM (Pulse Width Modulation) signal.

The drive circuit 210 is a well-known inverter circuit, and has a configuration in which a pair of semiconductor switching elements connected in series are connected in parallel, for example, three. 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 the output terminal 42, respectively.

The drive circuit 210 is connected to the power supply 60 via the power supply terminal 51 and is grounded. The power supply 60 supplies DC power to the drive circuit 210 via a wiring pattern P1 and a wiring pattern P2, which will be described later. The power source 60 is, for example, a secondary battery (battery).

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

Current sensor 211 detects a current value Iu flowing in the U phase of motor 80, a current value Iv flowing in V phase of motor 80, and a current value Iw flowing in W phase of motor 80, respectively. The current sensor 211 outputs current signals corresponding to the detected current values Iu, Iv, and Iw to the current sensor input circuit 207.

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

The angle sensor 90 is provided on the motor 80 and detects the rotation angle of the rotation 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.

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. Further, the angle sensor input/output circuit 208 supplies a driving voltage to the angle sensor 90.

The control unit 205 controls the drive circuit 210 via the inverter drive unit 206 based on the torque signal Tr, the vehicle speed signal v, the angle signal θ, and the like. Drive circuit 210 controls the drive of motor 80 based on a drive signal from inverter drive section 206.

[Component configuration of ECU]
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 convenience of explanation, the up-down direction, front-back direction, and 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-back direction, and the left-right direction are names 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-back direction as the Y-axis direction, and the up-down direction as the Z-axis direction.

The cover 10 is a member that is arranged to cover the upper side of the control board 20 and holds the control board 20. Control board 20 is a device for driving motor 80. The control board 20 includes 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 . is formed.

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

The control board 20 is attached to the holding member 30 by inserting screws 26 into the plurality of fourth through holes 24, respectively. By inserting the power terminal 51 of the connector 50 into the first through hole 21 of the control board 20, the control board 20 and the power terminal 51 are electrically connected.

Further, the first signal terminal 52 of the connector 50 is inserted into the second through hole 22 of the control board 20, so that the control board 20 and the first signal terminal 52 are electrically connected. Further, the second signal terminal 53 of the connector 50 is inserted into the third through hole 23 of the control board 20, so that the control board 20 and the second signal terminal 53 are electrically connected. Further, 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, so that the control board 20 and the output terminals 42 are electrically connected.

The holding member 30 is a casing that is disposed below the control board 20 and holds the control board 20. The holding member 30 has a heat sink 31. The heat sink 31 is a member disposed at a position corresponding to the drive circuit 210 of the control board 20 and for absorbing heat generated from the control board 20 and the like.

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

Furthermore, an output connector 40 is arranged on the left side of the front surface of the holding member 30. The output connector 40 is a member for connecting the downstream semiconductor switching element in the drive circuit 210 of the control board 20 and the motor 80. The output connector 40 has a plurality of output terminals 42 for supplying the electric 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.

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

A connector 50 is arranged below the holding member 30. The connector 50 has a first connector part 51A, a second connector part 52A, and a third connector part 53A. A plurality of power terminals 51 are accommodated in the first connector portion 51A. A plurality of first signal terminals 52 are accommodated in the second connector portion 52A. A plurality of second signal terminals 53 are accommodated in the third connector portion 53A.

[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 side of the control board 20. Further, the front-rear direction is referred to as the lateral direction, which is the direction along the short side of the control board 20. Note that the long side and short side of the control board 20 are not limited to the relationship shown in FIG. 3. In FIG. 3, the left-right direction may be the short side, and the front-rear direction may be the long side. Alternatively, the control board 20 may have a square shape with four sides of equal length.

The control board 20 has a rectangular outer shape. The drive circuit 210 and the control circuit 200 are arranged in this order along the lateral direction (second direction) of the control board 20. That is, in 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 closer to the fifth through hole 25 connected to the output terminal 42 of the output connector 40 than the control circuit 200 is. 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.

The control circuit 200 outputs drive signals for controlling the 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 signal output from the control circuit 200.

In a region on one end side (right end side in FIG. 3) of the control board 20 in the longitudinal direction (first direction), there are a first through hole group 21G, a second through hole group 22G, and a third through hole group. A group 23G is formed. The first through hole group 21G is arranged between the second through hole group 22G and the third through hole group 23G in the lateral direction of the control board 20.

Specifically, the first through-hole group 21G is arranged in a region near the right side of the drive circuit 210 at a position where the distance from the control circuit 200 is closer 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 makes it possible to shorten the length of the wiring pattern P1 and improve wiring efficiency, and also allows 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 where the resistance of the current path is lower than when the length of each wiring pattern is unnecessarily long or when multiple wiring patterns intersect. say.

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 the 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 the wiring pattern S1.

The first through hole group 21G has four first through holes 21. Four power terminals 51 are inserted into the first through hole 21 . Thereby, the first through hole group 21G is electrically connected to the four power 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.

The second through hole group 22G has 15 second through holes 22. Fifteen first signal terminals 52 are inserted into the second through hole 22 . Thereby, the second through hole group 22G is electrically connected to the fifteen 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.

The third through hole group 23G has three third through holes 23. Three second signal terminals 53 are inserted into the third through hole 23 . Thereby, 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.

[Connector configuration]
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 part 51A, a second connector part 52A, and a third connector part 53A, and these connector parts are integrated. 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.

A plurality of power terminals 51 are accommodated in the first connector portion 51A. A plurality of first signal terminals 52 are accommodated in the second connector portion 52A. A plurality of second signal terminals 53 are accommodated in the third connector portion 53A.

A power terminal group 51G including a plurality of power 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. The control board 20 is supplied with power from a power supply 60 via a power supply terminal 51 .

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, and the like are input to the control circuit 200 of the control board 20 via the first signal terminal 52.

The control circuit 200 generates a drive signal for controlling the drive of the motor 80 based on receiving a torque signal from the torque sensor 70, an angle signal from the angle sensor 90, and the like. At this time, noise superimposed on the signal input to the control circuit 200 may reduce the accuracy of control by the control circuit 200.

Therefore, in this embodiment, by arranging the second through hole group 22G near the right side of the control circuit 200, it is possible to suppress noise from being superimposed between the control circuit 200 and the second through hole group 22G. That's what I do.

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, respectively. 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 terminal 53.

Here, since a differential signal is used to transmit the CAN signal, it has higher resistance to noise than a sensor signal. Furthermore, the ignition signal has a higher allowable noise intensity than the sensor signal. Therefore, the third through-hole group 23G can be arranged at a position farther from the control circuit 200 than the second through-hole group 22G.

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

[Wiring pattern configuration]
FIG. 5 is an enlarged schematic diagram of the wiring pattern of the control board 20. As shown in FIG. As shown in FIG. 5, the control board 20 includes 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 P2 connected to the third through hole 23. A wiring pattern S1 is formed.

The wiring pattern P1 and the wiring pattern P2 are for supplying 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. This 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.

The wiring pattern S1 is for transmitting a signal 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 (towards the right end in FIG. 5) and is connected to the control circuit 200.

A second signal terminal 53 for transmitting a CAN signal as a differential signal is inserted into the third through hole 23a and the third through hole 23b. Further, a second signal terminal 53 for transmitting an ignition signal IGN is inserted into the third through hole 23c.

The length of the wiring pattern S1 is 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. For this reason, there is a concern that noise may be superimposed on a signal transmitted by the wiring pattern S1 or that noise may be superimposed on a signal transmitted by another wiring pattern.

Therefore, in this embodiment, a ground guard 27 connected to the ground is arranged around the wiring pattern S1. As a result, noise generated in the wiring pattern S1 may affect signals transmitted by other wiring patterns, or noise generated outside the wiring pattern S1 may affect signals transmitted by the wiring pattern S1. It is possible to prevent this from happening.

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 described below. FIG. 6 is a schematic diagram showing an example of a 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 via a plurality of insulating layers 20A to 20C. The wiring pattern S1 is formed using one or more wiring layers among the first wiring layer L1, the second wiring layer L2, the third wiring layer L3, and the fourth wiring layer L4.

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

The first insulating layer 20A, the second insulating layer 20B, and the third insulating layer 20C are made of a base material containing glass epoxy, polyimide, or the like. A resist 20D is arranged on the upper surface of the first wiring layer L1. Further, a resist 20E is arranged 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 vertical direction in the explanation of the structure of the multilayer board described above indicates the relationship when the stacking direction of the control board 20 is the vertical direction, and does not necessarily correspond to the vertical direction shown in FIG. 1 etc. .

Various wiring patterns formed on the control board 20 made of such a multilayer board may be formed using one wiring layer among the plurality of wiring layers L1 to L4, or may be formed using two or more wiring layers. may be formed. 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 among the plurality of wiring layers L1 to L4.

Note that the shape, size, arrangement structure, and number of arrangement of the first wiring layer L1, second wiring layer L2, third wiring layer L3, and fourth wiring layer L4 depend on the wiring method of the wiring pattern P1. It can be changed as appropriate.

[Effects of embodiment]
In the ECU 1 according to the present embodiment described above, a first through hole group 21G, a second through hole group 22G, and a third through hole group are provided at one end side in the longitudinal direction of the control board 20 (right end side in FIG. 3). 23G, and the first through hole group 21G is arranged between the second through hole group 22G and the third through hole group 23G in the lateral direction of the control board 20. Thereby, as shown in FIG. 3, by shortening the distance between the control circuit 200 and the first through-hole group 21G to which the power supply terminal 51 is connected, wiring efficiency can be improved.

Further, the second through hole group 22G connected to the first signal terminal 52 and the third through hole group 23G connected to the second signal terminal 53 are arranged in the first through hole group in the lateral direction of the control board 20. It was placed in two locations with 21G in between. As a result, the arrangement space for the second through hole group 22G connected to the first signal terminal 52 and the third through hole group 23G connected to the second signal terminal 53 can be reduced without increasing the area of the control board 20. Sufficient amount can be secured.

Furthermore, since the wiring pattern S1 is arranged so as to pass outside the first through-hole group 21G in the longitudinal direction of the control board 20, it is necessary to prevent the wiring pattern S1 from intersecting with the wiring patterns P1 and P2. This makes it possible to improve wiring efficiency.

Further, 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. Thereby, it is possible to suppress 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. Therefore, it is possible to suppress a decrease in the accuracy of control by the control circuit 200.

[Other embodiments]
In the above-described embodiment, a case has been described in which the motor control device of the present invention is applied to the ECU 1 of the electric power steering system 100, but the invention is not limited to this. It may be applied as a motor control device in a by-wire system or an automatic driving system.

Further, in the above-described embodiment, as shown in FIG. The direction and the second direction may be different directions.

Further, in the embodiment described above, the motor 80 is configured to be integrated with the ECU 1, but the present invention is not limited to this, and the motor 80 may be provided separately from the ECU 1.

Further, in the above-described embodiment, an internal 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 be used.

The present invention is not limited to the embodiments described above, and can be modified in various ways within the scope of the claims, and can be implemented by appropriately combining technical means disclosed in different embodiments. The form is also included within the technical scope of the present invention.

1 ECU
20 control board 21 first through hole 21G first through hole group 22 second through hole 22G second through hole group 23 third through hole 23G third through hole group 50 connector 51 power supply terminal 52 first signal terminal 53 second signal Terminal 80 Motor 200 Control circuit 210 Drive circuit S1 Wiring pattern S2 Wiring pattern

Claims (7)

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 driving of the motor to the control board;
Equipped with
The control board is
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 that is arranged on an end side in a first direction of the control board and is electrically connected to the plurality of power supply terminals by being inserted therethrough;
a second through-hole group disposed on the end side of the control board in the first direction, through which the plurality of first signal terminals are inserted, and thereby electrically connected to the plurality of first signal terminals;
a third through-hole group that is disposed on the end side of the control board in the first direction and is electrically connected to the plurality of second signal terminals by being inserted therethrough;
has
The first through-hole group is arranged between the second through-hole group and the third through-hole group in a second direction intersecting the first direction,
A motor 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 of the control board in the first direction. Control device. 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 through hole group is arranged on the first direction side of the drive circuit. The control board is
3. The motor control device according to claim 1, wherein a second wiring pattern connecting the control circuit and the second through hole group is shorter than the first wiring pattern. 4. The motor control device according to claim 3, wherein a ground guard connected to ground is arranged around the first wiring pattern. Equipped with multiple sensors,
2. The plurality of first signal terminals connected to the second through-hole group include signal terminals connected to signal lines for transmitting sensor signals from the plurality of sensors. 4. The motor control device according to any one of 4 to 4. 6. The plurality of second signal terminals connected to the third through-hole group include signal terminals connected to signal lines used for CAN (Controller Area Network) communication. The motor control device according to any one of the items. Any one of claims 1 to 6, 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. The motor control device described in .

Images