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Uninterruptible power supply method

  • US 5,856,712 A
  • Filed: 04/22/1997
  • Issued: 01/05/1999
  • Est. Priority Date: 12/05/1996
  • Status: Expired due to Fees
First Claim
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1. A method of providing an uninterruptible supply of power to a load during an ordinary times mode and in an emergency mode, said method comprising, during the ordinary times mode, the steps of:

  • modulating commercial AC input power into high-frequency AC power;

    applying the high-frequency AC power to a primary winding of a high-frequency transformer having the primary winding, a secondary winding and a tertiary winding;

    demodulating high-frequency AC power induced in the secondary winding from the primary winding into AC output power which is approximately equivalent to the commercial AC input power and has a waveform similar to that of the commercial AC input power;

    supplying the AC output power to the load;

    rectifying high-frequency AC power induced in the tertiary winding from the primary winding into DC power; and

    charging a storage battery with the DC power; and

    said method further comprising, during the emergency mode, the steps of;

    converting DC power from the storage battery into high-frequency AC power;

    applying the high-frequency AC power to the tertiary winding;

    averaging high-frequency AC power induced in the secondary winding from the tertiary winding, thereby producing AC output power; and

    supplying the AC output power to the load.

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