Direct current motor

摘要

A direct current motor comprising a field magnet provided with 2 mn magnetic poles which are magnetized with the same angular intervals as those of the magnetic poles N and S, where m is an integer of 1 or more, and n is an integer of 3 or more; a magnetic member for closing the magnetic circuit of the magnetic poles of the field magnet; an armature in which m(2n+/-1) armature coils are arranged with an equal pitch, the armature being directed towards the magnetic poles in the magnetic circuit; electric power supply control device capable of performing the switching of armature current 2 mn (2n+/-1) times per revolution of the armature; and a rotating shaft for rotatably supporting the armature and one of the magnetic poles, the rotating shaft supported by a bearing disposed in an outer casing of the direct current motor.