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Inverter controller for driving motor and air conditioner using inverter controller

  • US 20040217728A1
  • Filed: 03/30/2004
  • Published: 11/04/2004
  • Est. Priority Date: 04/03/2003
  • Status: Active Grant
First Claim
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1. An inverter controller for driving a motor, comprising:

  • an AC power supply for supplying an AC power;

    a rectifier formed of a diode bridge for rectifying the AC power to be converted to DC power;

    a reactor having a predetermined small capacity which is connected to the rectifier, for improving a power factor of the AC power supply;

    an inverter which converts the DC power to AC power for driving the motor;

    a capacitor having a predetermined small capacity which is connected between DC bus lines of the inverter to absorb regeneration energy from the motor;

    a motor voltage command generator which generates a motor voltage command value of the motor, based on a speed command value of the motor applied from the outside;

    a PN voltage detector which detects a DC voltage value of the inverter;

    a PN voltage corrector which calculates a ratio of the DC voltage detection value of the inverter obtained by the PN voltage detector to a predetermined DC voltage reference value of the inverter to thereby generate a PN voltage correction factor; and

    a motor voltage command corrector which generates a motor voltage command correction value of the motor.

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