Patent ID: 7652406

Claim:
An apparatus for driving a drum of a washing machine: a housing of the washing machine; a rotational shaft wherein its front portion is connected to the drum and its intermediate portion is rotatably mounted in the housing; double rotors including an inner rotor and an outer rotor in which a central portion of the inner rotor and the outer rotor is combined with the rotational shaft via a bushing and is rotatably supported, a plurality of N-pole and S-pole magnets are disposed alternately in annular form on different concentric circumferences in each rotor, and opposing magnets with a predetermined distance between the inner and outer rotors are disposed to have opposite polarities; and an annular stator which is installed with an air gap between the inner and outer rotors, wherein said stator is an integrated stator molded by using thermosetting resin after each of a number of stator core assemblies is obtained by which coil is wound on each of a number of division type stator cores, and the number of the coil-wound stator core assemblies are temporarily assembled.