| 摘要 |
PURPOSE: A synchronous motor is provided to improve efficiency by suppressing core loss and an increase of copper loss according to an increase of q-axis current. CONSTITUTION: A stator(2) includes a plurality of magnetic poles(21) and a plurality of slots(22) formed between the magnetic poles. A rotor(3) is arranged to face the outer circumference of the stator. A plurality of magnets(32) is formed on the surface of the rotor. A three-phase excitation coil is wound on each magnetic pole of the stator. The stator is comprised of a magnetic material which has a cylindrical or circumferential shape. The stator has the plurality of magnetic poles arranged with a fixed interval in a circumferential direction from an outer circumferential surface. The rotor is formed into a cylindrical shape which has an inner circumferential surface forming a predetermined gap with respect to the leading end part of the magnetic pole of the stator. The rotor includes a rotor main body(31) made of a non-magnetic material, a plurality of permanent magnets, and a plurality of electromagnets.
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