In a driver device, a controller substrate has a center part on which a rotation angle sensor is attached and an outer periphery portion which is fixed onto a heat sink. The heat sink has a cylinder part extending in an axial direction of the rotation shaft to contact the outer periphery portion of the controller substrate. The cylinder part of the heat sink is continuously formed along an entire periphery and has the same height at all portions. Such configuration provides an even deformation distribution of the cylinder part due to a temperature change, thereby reducing unevenness of heat stress distribution along a substrate plane and decreasing stress applied to the sensor, which facilitates a reduction of a detection error of the sensor.

An object of the present invention is to reduce an inductance of a power circuit, reduce a switching loss and a noise level and improve a voltage-use ratio of a battery power in a redundant-type electronic control device.

An electronic control device that controls a motor has power modules 11a, 11b to drive the motor. Power terminals 32pua, 32pva and 32pwa of the power module 11a are arranged in positions that are close to and face power terminals 32nub, 32nvb and 32nwb of the power module 11b, which are opposite to the power terminals 32pua, 32pva and 32pwa of the power module 11a in polarity. Power terminals 32nua, 32nva and 32nwa drawn from a longitudinal end portion 311 of the power module 11a are arranged in positions that are close to and face power terminals 32pub, 32pvb and 32pwb drawn from a longitudinal end portion 311 of the power module 11b which are opposite to the power terminals 32nua, 32nva and 32nwa of the power module 11a in polarity.

A power relay unit includes a high potential side relay connected so that an anode of a parasitic diode is on a high potential side and a cathode is on a low potential side, and a low potential side relay connected in series with a low potential side of the high potential side relay so that a cathode of a parasitic diode is on a high potential side and an anode is on a low potential side. A relay-to-relay connection line connects an intermediate point between the first high potential side relay and the first low potential side relay and an intermediate point between the second high potential side relay and the second low potential side relay. A control unit controls an on/off operation of the first high potential side relay based on a first supply voltage, a second supply voltage, and a relay intermediate voltage.

A manual power pack assembly for an electric power steering (EPS) system includes a motor housing at least partially enclosing a motor and having an outer diameter. The manual power pack assembly also includes a connector plate formed of a material comprising plastic, the connector plate having a first side, a second side, and a cylinder extending from the first side. The manual power pack further includes a metal ring disposed on an inner diameter of the cylinder and in contact with the outer diameter of the motor housing.

A vehicle is provided including an electronic power steering system, an electronic throttle control system, and a stability control system.

An electric power steering device (1) according to the present invention includes: a gearbox; and a driving control unit (4) connected to the gearbox through a mounting-portion contact surface (7). The driving control unit (4) includes an outer-diameter gradually increasing surface (11) formed on one end portion thereof, the outer-diameter gradually increasing surface (11) being connected so that an outer diameter thereof on the mounting-portion contact surface (7) matches with an outer diameter of the gearbox. Thus, it is possible to prevent a liquid from entering inside through the mounting-portion contact surface (7), thereby preventing electrical insulating properties of internal electric components from being lowered.

A motor controller is disclosed. A motor controller according to one embodiment of the present invention comprises a first electronic control unit (ECU) which comprises a first substrate having a first length and controls a motor, a connector which is connected to one end portion of one longitudinal side of the first substrate to transmit power and a signal to the first ECU, a second ECU which comprises a second substrate having a second length shorter than the first length and including one surface facing one surface of the first substrate and controls the motor, and a connection element which is disposed to connect the first ECU and the second ECU in a circuit and transmits the power and the signal to the second ECU.

A vehicle is provided including an electronic power steering system, an electronic throttle control system, and a stability control system.

A power steering assembly includes a housing having a first hole on a first axis. The power steering assembly includes a cartridge in the first hole and having a second hole and a third hole that are both centered on a second axis that is parallel with and spaced from the first axis. The power steering assembly includes a pulley supported by the second hole and the third hole. The power steering assembly includes a motor releasably fixed to the cartridge and operatively coupled to the pulley.

A motor is contained in a motor container space. A controller is contained in a controller container space. The motor container space and the controller container space are arranged in series in a direction of a rotation axis of a motor shaft, while interposing a partition wall therebetween. The motor shaft is inserted in a motor shaft through-hole of the partition wall. A magnet is disposed at an end of the motor shaft, in the controller container space. A rotation sensor is disposed in the controller container space oppositely to the magnet, for monitoring a rotational position of the motor shaft on the basis of variation in magnetic field due to rotation of the magnet. A cover made of nonmagnetic metal is disposed between the magnet and the rotation sensor so as to cover the motor shaft through-hole.