| 摘要 |
PROBLEM TO BE SOLVED: To obtain a small, lightweight, highly efficient induction motor at low cost with a winding system having no coil ends, and with the structures of a stator and a rotor. SOLUTION: In a single-phase induction motor, two kinds of coils are wound annularly, divided in the axial direction of the stator, and arranged in such a way that the center of each coil ring is aligned with that of a rotating shaft. A stator core is provided which constitutes each magnetic circuit at the outside circumferential side of each coil and both end sides of the axial direction. Inside the inside circumferential side, magnetic pole teeth provided with magnetic pole pieces are alternately formed at positions displaced at an electrical angleπ(rad) in the circumferential direction of the rotating shaft with each coil disposed in-between. Furthermore, non-magnetic members are arranged between the poles, and the magnetic pole teeth of each coil are stacked in the axial direction with the displacement of the electrical angleπ/2 (rad) in the circumferential direction of the rotating shaft. In a three-phase induction motor, three kinds of coils are used, and the magnetic pole teeth of each coil are displaced from each other at the electrical angle 2π/3 (rad). COPYRIGHT: (C)2005,JPO&NCIPI
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