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Compressor driving apparatus and home appliance including the same

  • US 10,641,533 B2
  • Filed: 09/24/2018
  • Issued: 05/05/2020
  • Est. Priority Date: 09/26/2017
  • Status: Active Grant
First Claim
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1. A compressor drive of a home appliance having a mechanical expansion valve and a compressor, the compressor drive comprising:

  • a capacitor that stores a charge;

    an inverter that converts direct current associated with the stored charge of the capacitor into alternating current based on a switching control signal, and outputs the alternating current toward a motor;

    output current detection circuitry that generates an output current based on the alternating current flowing between the inverter and the motor; and

    an inverter controller that generates the switching control signal to;

    start the motor, andcontrol a speed increase of the started motor based on a slope associated with a change in the output current from the output current detection circuitry during the speed increase of the motor,wherein the inverter controller manages the switching control signal such that a slope associated with the speed increase of the motor is decreased as a difference between a valve-on time of the mechanical expansion valve and a refrigerant discharge time of the compressor increases.

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