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Driving apparatus and method of three phase induction motor

  • US 6,876,171 B2
  • Filed: 04/16/2003
  • Issued: 04/05/2005
  • Est. Priority Date: 10/17/2002
  • Status: Active Grant
First Claim
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1. A driving apparatus for a three-phase induction motor comprising:

  • a three-phase power supply that supplies three-phase voltage;

    a rectifier that rectifies the three phase voltage supplied from the three phase power supply;

    a voltage reducer that reduces a DC voltage generated by the rectifier and outputs a stabilized DC voltage; and

    an inverter that varies the DC voltage output from the voltage reducer to a three-phase AC voltage and that drives the three-phase induction motor, said voltage reducer comprising;

    an integrated circuit that measures the DC voltage generated by the rectifier and that outputs a control signal to control the DC voltage output from the rectifier to the inverter;

    a gate driver that generates a drive signal to drive the inverter according to the control signal output from the integrated circuit;

    a DC stabilizer that reduces the DC voltage generated from the rectifier according to the drive signal of the gate driver, and that generates a stabilized DC voltage; and

    a DC link that links the DC voltage generated from the DC stabilizer to a load supplier that supplies the DC voltage applied to the DC link to the inverter.

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