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Emergency power system for capacitor start motors

  • US 5,325,034 A
  • Filed: 01/07/1992
  • Issued: 06/28/1994
  • Est. Priority Date: 01/07/1992
  • Status: Expired due to Fees
First Claim
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1. An emergency power circuit for an induction motor having at least first and second windings, said motor normally operating at a normal speed determined by connection to a commercial frequency power line subject to failure, comprising, in combination:

  • an emergency power DC storage battery;

    inverter means supplied by said battery and having output terminals connectable to said motor;

    a control circuit for said inverter means; and

    said control circuit establishing a run frequency to run said motor at a running speed considerably less than said normal speed.

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