Direct current motor with double layer armature windings

摘要

A direct current motor, having armature windings superposed on each other in double layers, is provided with a fixed field magnet having 2 mn poles (m being a positive integer of 1 or more, n a positive integer of 2 or more) magnetized alternately to N and S polarities in equal angular spaces, a magnetic material member for closing the magnetic path of the field magnet, rotating shaft supported by bearings provided in the housing of the motor, and an armature secured to the shaft for rotation in the magnetic path facing to the field magnet poles. A first series of m(2n-1) armature windings mounted on the armature are juxtaposed side by side at equal pitches, the angular spacing between the conductor portions of the windings, which contribute to generate torque, being equal to the angular width of the field magnet pole. A second series of m(2n-1) armature windings mounted on the armature are juxtaposed side by side at equal pitches, the angular spacing between the conductor portions of the windings of the second series, which contribute to generate torque, being equal to the angular width of the field magnet pole. The first series of armature windings and the second series of armature windings are superposed on each other and are disposed, with respect to each other, out of phase by 1/(2n-1) of the angular width of the field magnet pole.