Patent ID: 8125112

Claim:
A DC motor, comprising: a stator housing accommodating a permanent magnet stator having 2n stator poles; a rotor, rotatably mounted confronting the stator, the rotor comprising a shaft, a rotor core fitted to the shaft, a commutator fitted to the shaft adjacent one end of the rotor core, windings wound about teeth of the rotor core and electrically connected to segments of the commutator; and brush gear comprising a plurality of brushes in sliding contact with the commutator for transferring electrical power to the windings, wherein the rotor core has m rotor teeth and the rotor windings has m coils each coil being wound about a respective single one of the rotor teeth and each rotor tooth supporting one of said coils, and the commutator has 2m segments with each coil being connected to a respective pair of commutator segments and at least one segment being directly connected to only one of the coils, at least one segment being directly connected to two of the coils, and at least one segment being directly connected to none of the coils.