Electric power steering device for vehicle, has control device with power substrate contacting heat sink on which drive motor is assembled

摘要

A circuit case (50) assembled on a heat sink (70) attached with deceleration mechanism (35), includes control device (40) and a control substrate (60) mounting microcomputer and a power substrate (41). The power substrate contacts the heat sink and a drive motor (4) in the periphery of circuit case is assembled on the heat sink by a supporting element.