Patent ID: 6268669
Filing Date: 2001-07-31
Classification: B62D,H02K,Y10S

Abstract:
An electric motor for an electric power steering system for applying an assisting force to a member to be steered, in accordance with an input torque inputted to an input member, comprising:a motor case;an electric motor body accommodated within said motor case;a circuit board disposed within said motor case, said circuit board having a drive circuit installed thereon for driving said electric motor body, said circuit board further having a control circuit installed thereon for controlling said drive circuit;a board mounting member formed across an inner space of said motor case as a wall partitioning said electric motor body and said circuit board, said board mounting member being made of a material having a high thermal conductivity and supporting a bearing of an output shaft of said electric motor body, which projects through said board mounting member toward said circuit board;a lower case covering a lower side of said circuit board; anda torque limiter interposed between the output shaft of said electric motor body and a rotary shaft associated with said member to be steered, said torque limiter being accommodated in said lower case below said circuit board.