Patent ID: 7584817

Claim:
An electric power steering apparatus having an electronic control device for controlling motor current based on electric signals inputted from a torque sensor of an automobile and a motor for generating steering power, the electronic control device comprising: a PCB; a radiation plate spaced a predetermined distance from the PCB and having at least a first post and a second post both protruding a predetermined length from a surface of the radiation plate, each of the first post and the second post including a bolt hole formed on an inner portion of the post, the PCB being coupled to the post of the radiation plate by a bolt inserted into the coupling hole, the radiation plate including a coupling unit formed integrally with the radiation plate, the coupling unit being disposed between the first post and the second post; a metal substrate disposed on a side portion of the PCB in a plate shape, a first surface and a second surface of the metal substrate being perpendicular to the PCB, the first surface of the metal substrate being coupled to the coupling unit; and a heating device mounted on the PCB and having a terminal coupled to the PCB and a body coupled to the second surface of the metal substrate.