| 摘要 |
PROBLEM TO BE SOLVED: To provide a permanent magnet synchronous motor and an air compressor therewith, attaining little loss generated at a rotor, even if it is driven by an inverter which operates at fundamental frequency of around 1 kHz. SOLUTION: In a permanent magnet synchronous motor and an air compressor therewith, provided with a stator wound with an armature winding 4 in a plurality of slots 3 of a stator core 2, a conductive permanent magnet at the outer periphery of a conductive shaft 6 of a magnetic substance, and a rotor 5 having a reinforcing material formed out of conductive carbon fiber, an alurninum cylindrical member 7 is disposed between the shaft and a permanent magnet 8.
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