HEAT SINK DEVICE AND MOTOR WITH CONTROL DEVICE

摘要

A surface of a base is 3-way-partitioned, along the y-direction, into a first partition, a second partition, and a third partition which is sandwiched between the first partition and the second partition. First fins erected in the first partition and second fins erected in the second partition are configured so as to be parallel to the y-z plane. A third fin erected in the third partition is configured so as to be parallel to the y-z plane. Fourth fins and fifth fins erected on the third fin are configured so as to be parallel to a plane that is not parallel to the y-z plane. The fourth fins and fifth fins have a gap in the z-direction with respect to the surface of the base so as to not come into contact with the base.