| 摘要 |
PROBLEM TO BE SOLVED: To obtain a permanent magnet synchronous motor in which torque ripples and cogging torque of ripple component of the same degree with the number of poles 2p of magnets is reduced as close to zero as possible, by superimposing property that can control the phase of the torque ripples and the cogging torque to offset them; and to provide its manufacturing method. SOLUTION: This permanent magnet synchronous motor is provided with a stator 1 which is formed in an annular shape and has Z pieces (Z is a natural number) of teeth wound with winding 4, and a rotor 6 which has magnetic poles of 2p poles (p is a natural number) excited by permanent magnets 7 and is inserted inside the ring of the stator. In the permanent magnet synchronous motor using N phase as a conducting phase, the shape of the teeth that form each phase is made different from that of other phases at least in one phase or N-1 phase at the maximum. COPYRIGHT: (C)2007,JPO&INPIT
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