Patent ID: 8575811
Filing Date: 2013-11-05
Classification: H02K

Abstract:
1. A motor comprising a stator and a rotor, the stator comprising 2P poles where P is an integer greater than one, the rotor comprising a shaft, a rotor core and a, commutator fixed onto the shaft, wherein the commutator comprises m segments where m is an even integer greater than P, every two adjacent segments being electrically connected together by a winding unit so that the rotor winding comprises m winding units; at least one of the winding units comprising P coils connected in series; each coil of each winding unit is directly connected to a corresponding two segments; and wherein the m winding units comprise: one winding unit comprising only one coil; P−1 winding units each of which comprise P+1 coils connected in series; and m-P winding units each of which comprise P coils connected in series.