Patent ID: 7969056

Claim:
A rotating electric motor comprising: a stator core formed in a cylindrical configuration, a rotational shaft disposed in said stator core in a rotatable manner, a field yoke provided at a perimeter of said stator core, extending from one end to the other end of said stator core in an axial direction, allowing a flow of magnetic flux in the axial direction of said stator core, a first rotor core fixedly installed on said rotational shaft, a second rotor core fixedly installed on said rotational shaft, spaced apart from said first rotor core in the axial direction of said rotational shaft, a first magnet fixedly installed on said rotational shaft at a region located between said first rotor core and said second rotor core, and having a pair of magnetic poles aligned in the axial direction of said rotational shaft, a first rotor teeth formed at an outer surface of said first rotor core, protruding outwardly in a radial direction, a second magnet provided alongside of said first rotor teeth in a circumferential direction of said first rotor core, a second rotor teeth formed at an outer surface of said second rotor core, protruding outwardly in the radial direction, deviated from said first rotor teeth in the circumferential direction of said second rotor core, a third magnet provided alongside of said second rotor teeth in the circumferential direction of said second rotor core, and a winding allowing control of density of magnetic flux between at least one of said first rotor core and said second rotor core and said stator core by selectively forming a first magnetic circuit and a second magnetic circuit, said first magnetic circuit having a path running through said first rotor core in said axial direction, arriving at said field yoke, passing through said field yoke, and running through said second rotor core in said axial direction from an end of said second rotor core, said second magnetic circuit including at least one of a path arriving at said stator core from said first rotor teeth via an air gap, and a path from said stator core, arriving at said second rotor teeth via the air gap.