To provide a compact motor having high efficiency and low vibration, by improving the deterioration of motor efficiency due to increase of loss of copper.
The motor comprises an annular yoke portion 113; a plurality of inner teeth portions 112 formed in an inner diameter portion of the yoke portion 113; a plurality of outer teeth portions 117, arranged in the same circumferential position as each of the inner teeth portions 112 in the outer diameter portion of the yoke portion 113; a plurality of toroidally-wound coil portions 6 in the yoke portion 113; an inner rotor 24 corresponding to the inner teeth portion 112; and an outer rotor 25 corresponding to the outer teeth portion 117. The plurality of coil portions 6 are connected in a three-phase star or delta shape, and the inner rotor 24 is an embedded magnet type rotor.
COPYRIGHT: (C)2007,JPO&INPIT
Toshiyuki Tamamura
Yukio Honda
Masayuki Kondo
Kataoka Hisakazu
Morino Shumei
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