Patent ID: 7579736

Claim:
A three-phase DC brushless motor comprising: 3N (where N is a positive integer) stators arranged in a star pattern; a rotor having 4N permanent magnets arranged with alternating north and south poles; a first-phase coil wound to every third stator; a second-phase coil wound to the next every third stator; and a third-phase coil wound to the yet next every third stator; wherein the first-phase coil winds in the positive direction around the last first-phase stator, then winds one extra turn in the negative direction around the last third-phase stator, and then exits from a predetermined position between the last second-phase stator and the last third-phase stator; the second-phase coil winds in the positive direction around the last second-phase stator and then exits from a predetermined position; and the third-phase coil winds in the positive direction around the last third-phase stator, then winds one extra turn in the positive direction around the first first-phase stator, and then exits from a predetermined position.