UPS with bi-directional power flow

Details UPS with bi-directional power flow UPS with bi-directional power flow

1993-04-26

1995-08-08

Gaffin, Jeffrey A.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 64, 363133, H02J 702, H02J 906

Patent

active

054401798

ABSTRACT:
AS uninterruptible power supply (UPS) is disclosed in which AC line power is used to charge back-up battery and to operate a load during a stand-by mode of operation of the UPS. In the back-up mode of operation when AC line power is not available, the battery is used to supply power to the load. The UPS is implemented with only one inexpensive high frequency transformer and a single bi-directional power converter. Thus, the UPS of the present invention is lower in cost and complexity than such UPSs known in the prior art.

REFERENCES:
patent: 4238690 (1980-12-01), Clarke
patent: 4277692 (1981-07-01), Small
patent: 4916329 (1990-04-01), Dang et al.
patent: 5010469 (1991-04-01), Bobry

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