According to an embodiment of the present invention, an electric drive control device of the present invention, which is for controlling an electric motor that generates a drive force, includes a first electronic control unit disposed on a side opposite to a drive shaft of the electric motor among both sides of a motor housing in which the electric motor is accommodated in a direction of the drive shaft and configured to control the electric motor, and a second electronic control unit disposed opposite to the first electronic control unit in the direction of the drive shaft and configured to control the electric motor.

A plurality of power supply circuits include a second power supply circuit for a CPU included in a control unit and a first power supply circuit for another circuit. An output voltage from the first power supply circuit is higher than an output voltage from the second power supply circuit. A range of input voltage is divided into three levels of voltage sub-ranges in accordance with a requirements specification. When the input voltage falls within a lower level voltage sub-range, both of an output function of the first power supply circuit and an output function of the second power supply circuit are stopped. When the input voltage falls within an intermediate level voltage sub-range, the output function of the first power supply circuit is stopped. When the input voltage falls within an upper level voltage sub-range, all circuits are controlled so as to operate.

An electric apparatus is provided for an electric power steering system of a vehicle. The electric apparatus includes at least one electric machine and an electronic arrangement at least for controlling the at least one electric machine. The at least one electric machine and the electronic arrangement form a single common assembly unit for being mounted on the vehicle.

Provided are an electronic controller, an electric drive device, and an electric power steering apparatus that allow miniaturization and facilitate assembling work. An electronic controller 9 includes a board 31 and a connector assembly 41. The board 31 has connection holes 32 into which coil wires are inserted. The connector assembly 41 includes a flat plate portion 42 that leaves one side in the axial direction of an area of the board 31 open, the area including the connection holes, while covering a part of the board 31, and connector housings 44 provided on the flat plate portion 42, the connector housings 44 each allowing a terminal of an external device to be inserted therein along the axial direction.

A circuit board comprising a first power terminal, a second power terminal spaced apart from the first power terminal, a first ground terminal, a second ground terminal spaced apart from the first ground terminal, a first magnetic element part disposed along a first circular arc having a first radius, and a second magnetic element part disposed along a second circular arc having a second radius greater than the first radius, wherein an angle of at least one portion of the first circular arc is not overlapped with an angle of the second circular arc.

A motor includes a rotor, a stator including coils defined by windings of coil wires, a coil support into which the coil wires are inserted, a bearing supporting the shaft, a holder with a through-hole that holds both the bearing and the coil support. The coil support includes a base on the top surface of the stator, and a coil support portion extending axially upward from the base, at least a portion of which is located in the through-hole. The base is fitted to the stator through a gap.

A steering device according to one aspect of the disclosure includes: a speed reducer configured to decelerate a rotational power input from one surface side while increasing a torque and output rotation from an output section disposed on the other surface side; a motor provided on the one surface side and configured to input the rotational power to the speed reducer; and a control device for controlling the motor. The motor includes a rotor for generating the rotational power. The rotor includes a rotor output shaft disposed coaxially with an output axis of the output section. The motor inputs the rotational power from one end side of the rotor output shaft to the speed reducer. The control device is disposed on the other end side of the rotor output shaft coaxially with the rotor output shaft and includes a sensing unit for sensing rotation of the rotor.

A first circuit energizes a steering assist actuator to electrically assist steering of a driver. A second circuit is provided in a same housing as the first circuit and energizes a positional actuator to move a steering position. A controller operates the first and second circuits to control operations of the steering assist actuator and the positional actuator. The controller changes a priority between the first circuit and the second circuit in a start period, in which the steering control device is started, a normal operation period, in which the steering control device is operated normally, and a stop period, in which the steering control device is stopped. The priority includes at least one of an order of operating the first circuit and the second circuit, output allocation between the first circuit and the second circuit, and output magnitude between the first circuit and the second circuit.

To provide an electric driving device and an electric power steering device with a smaller area of power supply wiring in a circuit board and higher reliability of the circuit board. An electric driving device includes a motor and an electronic control unit that controls rotation of the motor. The electronic control unit includes a first circuit board, a second circuit board, a power supply wiring module, and a heat sink. The first circuit board is provided with a transistor that outputs an electric current to excite a motor coil. The second circuit board includes a control circuit that controls an electric current supplied to the transistor. The power supply wiring module is configured by molding, with resin, a choke coil for noise removal, a capacitor, and wiring that supplies electric power to at least one of the first circuit board and the second circuit board. The heat sink is sandwiched between the power supply wiring module and the second circuit board.

A power supplying-side terminal (38) has a power supplying-side hanging portion (38H) extending toward a surface of the circuit board (31), a power supplying-side extending portion (38E) bent from the power supplying-side hanging portion (38H) and extending outwards along the surface of the circuit board (31) and a power supplying-side standing portion (38S) bent from the power supplying-side extending portion (38E) and extending in a direction away from circuit board (31). A power receiving-side terminal (39) has a power receiving-side extending portion (39E) extending outwards along the surface of the circuit board (31) and a power receiving-side standing portion (39S) bent from the power receiving-side extending portion (39E) and extending in the direction away from circuit board (31). The power supplying-side standing portion (38S) and the power receiving-side standing portion (39S) overlap each other, and connected to each other so as to have electrical continuity.