31 and 32. By providing the positioning pins 144 and 244, the boards 31 and 32 and the extension member 70 and the power system connection components 141 and 241 can be positioned. Although not shown in FIG. 7, the signal system connection components 146 and 246 are also substantially the same as the power system connection components 141 and 241 except for the shape of the terminals. FIG. 7 is a schematic cross-sectional view, and for the sake of explanation, it is described without distinguishing between systems.

As shown in FIGS. 3 and 7, the connectors 152, 162, 252, and 262 are erected along the axial direction from the base portion 51, and the openings are formed facing outward in the axial direction. The vehicle system connectors 152 and 252 are integrated-type hybrid connectors in which a power system connector connected to a vehicle power supply and a ground and a communication system connector connected to a vehicle communication network 6 (see FIG. 1) such as a controller area network (CAN) are integrated.

The vehicle system connector 152 and the steering system connector 162 of the first system are used for power supply to the first motor winding 180 and signal transmission related to energization control, and the vehicle system connector 252 and the steering system connector 262 of the second system are used for power supply to the second motor winding 280 and signal transmission related to power supply control. In the present embodiment, the control components such as the microcomputer and the power supply path are made redundant. However, when the control part and the power supply path are made in one system, one of the vehicle system connectors 152 and 252 is buried by potting or the like. In other words, when the power supply from a vehicle power supply 5 and the information acquired by communication with the vehicle communication network 6 are commonly used for the energization control of the two sets of motor windings 180 and 280, one of the vehicle system connectors 152 and 252 is buried unconnectable. Therefore, parts can be shared. Also, when there is only one system of control parts and power supply path, one of the vehicle system connectors 152 and 252 may be eliminated. The steering system connectors 162 and 262 are also the same as the vehicle system connectors 152 and 252.

The vehicle system connectors 152 and 252 are provided with vehicle system terminals 154 and 254 that are connected to the sub board 32. The vehicle system terminals 154, 254 include the power terminals 155, 255, the ground terminals 156, 256, and the communication terminals 157, 257, respectively. In the present embodiment, the number of each of the communication terminals 157 and 257 is six, and the vehicle system connectors 152 and 252 are each provided with a total of eight terminals.

The steering system connectors 162, 262 include the sensor terminals 164, 264 connected to the sub board 32. In the present embodiment, the number of each of the sensor terminals 164 and 264 is eight. The connection between the vehicle system terminals 154, 254 and the sub board 32 and the connection between the sensor terminals 164, 264 and the sub board 32 are performed by press-fitting, socket connectors, or the like, so long as electrical continuity can be achieved.

In the present embodiment, the vehicle system connectors 152 and 252 and the steering system connectors 162 and 262 have separate openings. Therefore, the connection between the vehicle system connectors 152 and 252 and the vehicle power supply 5 and the vehicle communication network 6 and the connection between the steering system connectors 162 and 262 and the torque sensor 93 can be performed separately.

Specifically, when the drive device 1 is assembled to the steering shaft 92 to assemble the electric power steering device 8, the steering system connectors 162 and 262 and the torque sensor 93 are connected by the harness 94. After that, the electric power steering device 8 is mounted on the vehicle, and the vehicle system connectors 152 and 252 are connected to the vehicle power supply 5 and the vehicle communication network 6. As a result, various inspections can be performed on the electric power steering device 8 in a gear assembly state.

In the boards 31 and 32, the components related to the first system and the components related to the second system are arranged in separate areas. When projected in the axial direction, the vehicle system connector 152 and the steering system connector 162 are provided on the first system area side, and the vehicle system connector 252 and the steering system connector 262 are provided on the second system area side. The vehicle system connectors 152 and 252 are arranged side by side on both sides of the system dividing line Lc. Similarly, the steering system connectors 162, 262 are arranged side by side on both sides of the system dividing line Lc.

The vehicle system connectors 152 and 252 are connected to the vehicle power supply 5 and the vehicle communication network 6 by being fitted with connectors (not shown). Lock pins 153, 253 that engage with the levers of the connectors protrude from the side walls of the vehicle system connectors 152, 252, respectively. The lock pins 153, 253 are formed on a straight line Lp orthogonal to the system dividing line Lc. That is, the lock pins 153 and 253 are arranged on the same straight line. Here, “on the same straight line” means that a deviation of about a manufacturing error is allowed. The same applies to terms such as orthogonal. By forming the lock pins 153 and 253 on the same straight line, the mold used for molding the connector unit 50 can be simplified.

Here, in the reference example shown in FIG. 14, the vehicle system connector 152 and the steering system connector 262 are arranged side by side, and the vehicle system connector 252 and the steering system connector 162 are arranged side by side. When the steering system connectors 162, 262 are arranged in a crossed state as in the reference example, the harness 94 may pass through an upper surface of the opening of the vehicle system connectors 152, 252 when the steering system connectors 162, 262 and the torque sensor 93 are assembled. If the harness 94 pass through the upper surface of the opening of the vehicle system connectors 152, 252, the harness 94 must be avoided when fitting the vehicle system connectors 152, 252 and the connector. Therefore, it becomes difficult to assemble the vehicle system connectors 152, 252 and the connector.

In the present embodiment, the vehicle system connectors 152 and 252 are arranged side by side, and the steering system connectors