An electric drive device of the present invention has: a connector assembly 13 having external terminal forming portion 13B, 13S; a metal cover 12 accommodating connector assembly 13 with external terminal forming portion 13B, 13S exposed; an annular seal portion 23 having an annular seal groove 31 in which metal cover 12 and connector assembly 13 are sealed; and a plurality of fixing bolts 21 fixing connector assembly 13 to a housing 11. Annular seal groove 31 is formed in region that connects two fixing bolts 21 in a straight line. Since annular seal groove 31 is formed in the straight region connecting the two fixing bolts 21, warp of region where annular seal portion 23 is formed is corrected by the fixing bolts 21, thereby securing good sealing performance between annular seal portion 23 of connector assembly 13 and an annular protruding edge portion 28P of metal cover 12.

A control device includes a first substrate provided with a chip electronic component; a second substrate having a surface provided with electronic components including a tall component taller than the chip electronic component, the surface of the second substrate facing a surface of the first substrate that is provided with the chip electronic component; and a heat sink disposed between the first substrate and the second substrate. The heat sink includes a component receiving portion and a heat dissipation portion, the component receiving portion being configured to receive the tall component, the heat dissipation portion being configured to perform heat exchange between the first substrate and the second substrate, and the component receiving portion and the heat dissipation portion being provided so as not to overlap with each other as viewed in a facing direction in which the first substrate and the second substrate face each other.

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 steering device includes: a worm wheel linked to a steering shaft; a worm shaft engaging with the worm wheel; an electric motor supplying rotational force to the worm shaft and including a motor shaft connected to a first end of the worm shaft; a gear housing containing the worm wheel and the worm shaft; a bearing supporting a second end of the worm shaft; a center adjuster that is contained in the gear housing and includes a holder and a collar, wherein the collar is disposed in the holder and retains the bearing so as to allow the bearing to move with respect to the holder in a gear engagement direction; and a biasing member disposed in the center adjuster and structured to bias the bearing in a direction inclined with respect to the gear engagement direction.

A motor electric control unit (ECU) for an electromechanical power steering mechanism, which controls current through an electric assist motor in response to steering mechanism sensors' signals. The ECU may comprise at least two channels. Each channel has the steering mechanism sensors in a redundancy concept. At least one voter that is assigned to an actuator and is configured to vote on the correct steering mechanism sensors' outputs of the at least two channels. The steering mechanism sensors may include a steering column torque sensor and an RPS sensor for sensing a rotor angle of the electric assist motor. Each of the at least two channels may include processors that have different software to protect against systematic faults.

A motor includes a first inverter electrically connected to a first end of a winding of each phase, and a second inverter electrically connected to a second end of the winding of each phase. Each of the first and second inverters includes low-side switching elements and high-side switching elements. FETs of the first inverter are electrically connected to a first end of a U-phase winding. FETs of the second inverter are electrically connected to a second end of the U-phase winding. At least a portion of a current flowing from one of the FETs of the first inverter to the U-phase winding flows to one of the FETs of the second inverter. One of the FETs of the first inverter and one of the FETs of the second inverter are adjacent to each other.

An electric power steering device includes a motor and a control unit that are arranged coaxially with each other in an axial direction of an output shaft and integrated with each other. The control unit includes power modules configured to supply current to the motor, a heat sink, a control board configured to output a control signal to the power modules, and a rotation sensor. The power modules, a column portion of the heat sink, and the control board are arranged in parallel to the axial direction of the output shaft. The rotation sensor is provided in a recess formed in a base portion of the heat sink at an opposite position to a sensor rotor mounted to an end portion of the output shaft on the control unit side.

A drive unit for an electrical power-assisted steering system of a motor vehicle may include an electric motor with a stator housing to which a control housing, in which a control circuit board is arranged, is attached, and with a connecting unit, attached to the stator housing, which has electrical connecting elements and at least one positioning element. The connecting elements are electrically connected to the electric motor and to the control circuit board. The positioning element interacts with the control circuit board for the purpose of relative positioning. To enable simpler and more secure mounting, the positioning element interacts with the control housing for the purpose of relative positioning.

In an electric rotating machine apparatus according to the present disclosure, there is adopted a structure in which an extending portion of a control circuit board on which a power module for supplying electric power to windings and a driving circuit for the power module are mounted passes through an external-connection opening portion of an electromagnetic shield and then is connected with connectors. A filter circuit 11 is mounted on the extending portion of the control circuit board so as to secure noise-removal capability. Because a conventional dedicated wiring board for mounting the filter circuit thereon is not required, the foregoing structure can contribute to downsizing and cost reduction. In addition, the foregoing structure can contribute to downsizing and cost reduction of an electric power steering apparatus equipped with the electric rotating machine apparatus according to the present disclosure.

One embodiment relates to a motor comprising: a housing; a stator disposed in the housing; a rotor disposed in the stator; a shaft coupled to the rotor; a cover disposed on the housing; and an upper bearing disposed on the cover. The cover comprises: a first body having the upper bearing disposed thereon; a second body disposed on the lower side of the first body; a third body disposed on the lower side of the second body; and a protrusion part protruding in the radial direction from the outer peripheral surface of the second body, wherein the third body comprises an inclined surface inclining inwardly with respect to the outer peripheral surface of the second body. Accordingly, when a system and the motor are combined, the motor prevents an increase in the amount of interference between the housing and the cover by means of a reaction force design between the cover and each of the housing and the bearing, and thus a coupling failure in the assembly, as a result of a reaction force, occurring when the system and the motor are coupled may be prevented.