Patent ID: 8911221
Filing Date: 2014-12-16
Classification: F04D

Abstract:
1. A blower comprising: a case, a motor and an impeller driven by the motor, wherein the case comprises an air inlet, an air outlet, and an air channel communicating the air inlet with the air outlet, the impeller being disposed inside the air channel, wherein the motor comprises a stator and a rotor rotatably mounted to the stator, the stator comprising a stator core which comprises a yoke, P primary poles with stator windings wound thereon and P auxiliary poles, the primary poles and auxiliary poles being alternately arranged on the radially inner side of the yoke in a circumferential direction thereof, when the stator windings are electrified, P primary magnetic poles and P auxiliary magnetic poles are formed at the primary poles and auxiliary poles, respectively, the polarity of the primary magnetic poles being opposite to the polarity of the auxiliary magnetic poles, P being an integer greater than one; wherein the rotor comprises a shaft, a rotor core, a rotor winding comprising m winding units where m is an even integer greater than P, and a commutator fixed onto the shaft; wherein the commutator comprises m segments, every two adjacent segments of the m segments being electrically connected together by a winding unit; and at least one of the m winding units comprises P coils connected in series, and opposite ends of each coil are directly connected to corresponding two of the m segments.