Patent ID: 8089192

Claim:
A three-phase square-wave permanent magnet brushless DC motor with a plurality of pairs of permanent magnets placed on a rotor core and three-phase windings placed in slots of a stator core comprising: the number 2P of magnetic poles on said rotor core is 8; the slot number Z of said stator core is 12, accordingly there are 12 teeth, the opening width of said slot ( 3 ) is 0.1˜3.0 mm, said 12 teeth include three big teeth, three medium teeth and six small teeth; said three-phase windings are concentrated windings, which are respectively wound on the big teeth and the medium teeth, said three-phase windings and said teeth are arranged in this order: A-phase windings on the big tooth→the small tooth→/C-phase windings on the medium tooth→the small tooth→B-phase windings on the big tooth→the small tooth→/A-phase windings on the medium tooth→the small tooth→C-phase on the big tooth→the small tooth→/B-phase windings on the medium tooth→the small tooth; herein, A indicates a concentrated winding of the A-phase windings, /A is a reversal concentrated winding of A-phase windings, and B, /B, C, /C can be deduced by analogy.