Uninterruptible power supply

  • US 6,184,593 B1
  • Filed: 07/29/1999
  • Issued: 02/06/2001
  • Est. Priority Date: 07/29/1999
  • Status: Expired due to Fees
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First Claim
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1. An uninterruptible power supply (UPS), comprising:

  • (a) a dc bus;

    (b) a first uncontrolled rectifier in combination with a first filter for coupling a main ac power supply to the dc bus with a first power factor;

    (c) a second uncontrolled rectifier in combination with a second filter for coupling an auxiliary generator to the dc bus with a second power factor; and

    (d) a dc-to-ac inverter operatively coupled to the dc bus for providing ac output power to a load;

    wherein the first and second power factors are greater than or equal to approximately 0.95.

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