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Method and apparatus of detecting low flow/cavitation in a centrifugal pump

  • US 6,709,240 B1
  • Filed: 11/13/2002
  • Issued: 03/23/2004
  • Est. Priority Date: 11/13/2002
  • Status: Expired due to Fees
First Claim
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1. A motor controller for a pump, the controller configured to:

  • acquire voltage and current signals from at least one voltage sensor and at least one current sensor of a motor starter;

    determine a power signal in the motor starer from the voltage and current signals;

    perform a spectrum analysis on the power signal;

    compare the analyzed power signal to a base signal; and

    from the comparison, determine at least one of low flow and cavitation in the pump.

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