Nsk Corporation

Atsushi Ooshima

Seiichi Kobayashi

Hideaki Kawada

Takaaki Sekine

Shigeo Shinohara

Takeshi Senba

Keiji Kashimoto

Tetsuya Kodama

Shigeru Endo

Atsushi Horikoshi

Tamotsu Oumi

Yasuhiro Shimizu

Naoki Hyoudou

Mitsuo Shimoda

A motor control apparatus includes a steering column having inserted therein a steering shaft to which steering torque is transmitted, a reduction gear box coupled to the steering shaft, and an electric motor that transmits a steering assisting force to the steering shaft via a reduction mechanism in the reduction gear box. The electric motor and its control unit including a control board mounted with a control circuit, are provided side by side in the reduction gear box. A connection terminal of the electric motor is electrically connected to the control unit directly. This minimizes a connection distance between the control unit and the electric motor.

Electric power steering apparatus and method of assembling the same

To provide an electric power steering apparatus in which it is possible to reduce a size of the entire structure of a control unit while sufficiently showing a heat radiation effect of heat generating members. The electric power steering apparatus includes a steering columnhaving inserted therein a steering shaftto which steering torque is transmitted, a reduction gear boxcoupled to the steering shaft, and an electric motorthat transmits a steering assisting force to the steering shaftvia a reduction mechanism in the reduction gear box. In the reduction gear box, a motor mounting sectionfor mounting the electric motoris formed at an end face in a direction perpendicular to an axis of the steering shaftand a control-unit mounting sectionfor mounting a control unitfor controlling to drive the electric motoris formed near the motor mounting section

Electric power steering apparatus

Growing community of inventors

Fujisawa, Japan

Atsushi Ooshima