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Driving system for permanent magnet type synchronous machine suitable for electric vehicle and driving control method using the same

  • US 5,920,161 A
  • Filed: 05/26/1998
  • Issued: 07/06/1999
  • Est. Priority Date: 05/26/1997
  • Status: Expired due to Term
First Claim
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1. A driving arrangement for a permanent magnet type synchronous machine system for propelling a vehicle, said machine system having a synchronous motor, a permanent magnet type generator and a battery as main electric power sources, and an electric power converter coupled to said generator and to said battery for providing electric power to drive said synchronous motor, said driving system comprising:

  • a current command generator for generating a d-axis current command and a q-axis current command for said synchronous machine system;

    a d, q-axis current control unit for generating AC voltage command values Vu*, Vv* and Vw* based on the d, q-axis current commands and detected values of d, q-axis currents from said synchronous machine svstem;

    a PWM control unit for generating driving signals for said electric power converter based on said AC voltage command values;

    a phase generating unit for generating a phase signal from zero-cross point information of said AC voltage command values and a phase difference angle δ

    between induced voltage and terminal voltage of said synchronous machine; and

    a magnet temperature compensating unit for compensating said phase difference angle δ

    depending on magnet temperature rise of said permanent magnet type synchronous machines.

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