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Variable frequency motor starting system and method

  • US 6,150,776 A
  • Filed: 05/04/1999
  • Issued: 11/21/2000
  • Est. Priority Date: 05/04/1999
  • Status: Active Grant
First Claim
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1. A variable frequency motor starting system comprising:

  • a variable frequency AC power supply for generating an AC power output signal having a variable frequency, including a power output terminal adapted for applying the AC power output signal to an AC motor; and

    a controller coupled to the variable frequency AC power supply for producing a control signal for adjusting the frequency of the variable frequency AC power supply, wherein the controller adjusts the frequency from a first value to a second value, the second value being below the first value and then adjusts the frequency by increasing the frequency from the second value to a final value.

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