Leaf blower

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.