Patent ID: 9644305
Date: 2017-05-09
CPC Classifications: D06F,H02K

Claim:
1. A drive motor for a drum washing machine, the drive motor comprising: a stator including a stator core fixed to a tub and the stator core comprising a plurality of split cores arranged in an annular form, wherein each of the split cores comprises an outer tooth, an inner tooth formed in opposition to the outer tooth, a partitioning portion formed between the outer tooth and the inner tooth, and connecting portions formed at both end portions of the partitioning portion and connecting two neighboring split cores in such a way that the split cores form the annular form, and wherein a first coil is wound around the outer tooth, and a second coil is wound around the inner tooth, the first coil and the second coil being separated from each other; a rotor including a rotor support that is connected to a drum via a rotating shaft, an outer rotor fixed to the rotor support and arranged with a gap on an outer surface of the stator, to thus be rotated by interacting with the first coil, and an inner rotor fixed to the rotor support and arranged with a gap on an inner surface of the stator, to thus be rotated by interacting with the second coil; and a motor drive circuit configured to control an alternating-current (AC) power to be applied to both the first and second coils at a washing mode, for driving both the inner and outer rotors simultaneously, and to control the AC power to be applied to any one of the first and second coils at a dehydration mode, for driving any one of the inner and outer rotors.