Patent ID: 7701103

Claim:
An electric motor for rotatably driving a connected load, comprising: an outer rotor provided with a magnet and disposed inside the motor in a position close to the load; an inner rotor provided with a magnet and disposed inside the motor in a position away from the load; a stator disposed between the outer rotor and the inner rotor, and provided with a stator coil; a stationary shaft-shaped central portion disposed so as to extend completely through respective central portions of the outer rotor, the inner rotor, and the stator; and a power supply structure provided using the interiors of the stator and the shaft-shaped central portion, wherein the stator coil of the stator has coil terminals at an internal peripheral edge thereof, and the power supply structure comprises interface bus bars disposed in the shaft-shaped central portion, and coil bus bars disposed radially of the stator and interconnecting load-side ends of the interface bus bars and the coil terminals.