| 摘要 |
PROBLEM TO BE SOLVED: To reduce a cost, and to prolong the life by using a single-phase AC power supply, and forming a motor out of a simple drive (speed control) circuit. SOLUTION: This motor is a two-pole flat motor having air gaps in axial directions. The motor is provided with an excitation coil 5 which generates AC magnetic fluxes by the single-phase AC power supply and a pair of permanent magnets 6, 7 which generate DC magnetic fluxes, and is composed of a stator 1 which generates those magnetic fluxes in the axial direction of a shaft 3, and a disk-shaped rotor 2 on which a short-circuiting winding 10 to which diodes 11 for causing a half-wave rectified current to flow by the AC magnetic fluxes are connected in series, is wound in the circumferential direction at equal intervals. The AC magnetic fluxes generated by the excitation coil 5 of the stator 1 and the DC magnetic fluxes generated by the permanent magnets 6, 7 are generated in directions vertical to the surface of the rotor 2. A force in one direction acts on the short-circuiting winding 10 by the DC magnetic fluxes and a current which flows in the short-circuiting coil 10 by the AC magnetic fluxes, and this generates continuous torque and rotates the rotor 2.
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