| 摘要 |
PROBLEM TO BE SOLVED: To reduce iron loss, suppress generation of heat, or the like, in a motor. SOLUTION: The motor is equipped with a coil 60 for excitation, holders 50 and 30 for holding the coil, and a rotor 40 supported, in such a manner as to rotate on a predetermined axis line L. The rotor 40 includes an inside rotor 41, magnetized in a predetermined pole placement and a cylindrical outside rotor 42, which is located outside the inside rotor and is concentrically and integrally rotated, together with the inside rotor and is magnetized in a predetermined pole placement. The coil 60 for excitation is divided into a plurality of coils 60, in the circumferential direction and are arranged between the inside rotor and the outside rotor. According to this structure, a high-performance motor with high magnetic efficiency for which the length of magnetic path can be shortened, iron loss can be reduced, and generation of heat can be suppressed for the motor as a whole can be obtained. COPYRIGHT: (C)2009,JPO&INPIT
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