Patent ID: 7868505

Claim:
A motor which is formed by connecting multiple base modules to each other in a direction in which a rotating shaft extends, and in which an electric power supply to each base module is controlled by an electric power supply control apparatus, the base module including: a stator including a hollow cylindrical ring body that forms a magnetic path, wherein an even number of stator poles are arranged at regular intervals in a circumferential direction of the ring body and the stator poles project inward, in a radial direction, from an inner face of the ring body; and a rotor, arranged coaxially within the stator, that forms a magnetic path, wherein the rotor has the same number of rotor poles as the stator poles, the rotor poles project outward, in the radial direction, from an outer face of the rotor, the rotor poles are arranged at regular intervals in the circumferential direction, and the rotor poles face the stator poles formed on the stator when the rotor is at a predetermined rotational position; a permanent magnet arranged in an alternate inter-pole magnetic path portion among an even number of inter-pole magnetic path portions located between successive stator poles so that a magnetic field pointing in the circumferential direction of the ring body is generated in the same direction; and a coil, which generates a magnetic field that opposes the magnetic field generated by the permanent magnet using electric power supplied by the electric power supply control apparatus, and that is wound around the remainder of the alternate inter-pole magnetic path portion where no permanent magnet is arranged, wherein the rotational position at which the stator pole and the rotor pole face each other varies with each base module by a substantially equal phase difference.