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Compressor control at voltage and frequency extremes of power supply

  • US 6,238,188 B1
  • Filed: 12/15/1998
  • Issued: 05/29/2001
  • Est. Priority Date: 08/17/1998
  • Status: Expired due to Fees
First Claim
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1. A method of operating a compressor comprising the steps of:

  • (1) providing an electric motor for driving a compressor, and a control for monitoring a characteristic indicative of the speed of the compressor as driven by said electric motor;

    (2) operating said compressor and monitoring a characteristic indicative of the speed of said compressor; and

    (3) reducing a compressor load if the monitored speed is outside of a predetermined range.

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