Uninterruptible power supply method

Details Uninterruptible power supply method Uninterruptible power supply method

1997-04-22

1999-01-05

Elms, Richard T.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 66, 307 87, 363 9, 363 34, H02J 700

Patent

active

058567127

ABSTRACT:
A method for providing an uninterruptible power supply to a load both at ordinary times and in an emergency. At ordinary times, commercial AC input power is modulated into high-frequency AC power, which is then applied to a primary winding of a high-frequency transformer having the primary winding, a secondary winding and a tertiary winding. High-frequency AC power induced in the secondary winding from the primary winding is demodulated into AC output power, which is then supplied to the load. High-frequency AC power induced in the tertiary winding from the primary winding is rectified into DC power, with which a storage battery is charged. In an emergency, DC power from the storage battery is converted into high-frequency AC power, which is then applied to the tertiary winding. High-frequency AC power induced in the secondary winding from the tertiary winding is averaged, thereby producing AC output power, then the AC output power is supplied to the load.

REFERENCES:
patent: 5029064 (1991-07-01), Ball
patent: 5334877 (1994-08-01), Mohan et al.
patent: 5363286 (1994-11-01), Tsuchiya
patent: 5483463 (1996-01-01), Qin et al.
patent: 5598326 (1997-01-01), Liu et al.

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