Uninterruptible power supply having improved battery charger

Details Uninterruptible power supply having improved battery charger Uninterruptible power supply having improved battery charger

1991-09-27

1993-02-09

Voeltz, Emanuel T.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 64, 363 37, H02J 702

Patent

active

051855364

ABSTRACT:
An UPS apparatus with a back-up battery and successively coupled rectifier, inverter and output filter circuits, having an improved battery charging circuit. The charging circuit has a transformer with its primary winding being part of the output filter, and its secondary winding driving a second rectifier circuit which produces the charging current. The charging circuit contains an impedance preferably connected between the transformer secondary winding and the second rectifier circuit, for capturing only a high frequency portion of the signal from the inverter stage, thereby enabling the utilization of smaller charger circuit elements.

REFERENCES:
patent: 4395639 (1983-07-01), Bring
patent: 4473756 (1984-09-01), Brigden et al.
patent: 4694194 (1987-09-01), Hansel et al.
Ralph E. Tarter, Principles of Solid-State Power Conversion, Howard W. Sams & Co., Inc., 1985, pp. 392-393.

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