Patent ID: 8193673

Claim:
A brush motor comprising a stator with 2P poles and a rotor comprising a rotor core, a commutator and windings wound about teeth of the rotor core, wherein the rotor core comprises N teeth with a slot formed between adjacent teeth; the commutator comprises M segments represented by Z 1 . . . Z X . . . Z Y . . . Z M , M being greater than N, N, P, Y and X being integers, M being an odd integer; each winding comprises a start connected to a segment Z X and an end connected to another segment Z Y , Z X and Z Y satisfying the following equation: |Y−X|=(M±1)/P; each winding comprises at least one coil wound on corresponding tooth/teeth, some of the windings comprise a plurality of coils wound on different teeth, the total number of turns of the coils of each winding being substantially the same; and a winding unit formed by a plurality of windings is connected between every pair of adjacent segments.