The air-gap flux of permanent magnet synchronous motor is constant under normal working condition,so the ship driven by ordinary permanent magnet synchronous motor presents the disadvantages of narrow speed range and low output torque.This paper studies the flux adjustable permanent magnet synchronous motor(PMSM)with varying magnetic flux for ship drive.The variation of magnetic field can promote output torque at low speed and broaden the operation range at high speed.The structure of flux adjustable inner permanent magnet synchronous machine is introduced,the regulation mechanism of magnetic field is analyzed.The changing discipline of magnetic density distribution,electric torque,flux linkage and power performance are obtained based on finite element method.The relevant conclusions indicate that the motor can effectively expand the operating speed of ships and increase the output power of the PMSM.
维普
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