Off-line switcher with battery reserve

Details Off-line switcher with battery reserve Off-line switcher with battery reserve

1986-04-17

1988-05-17

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 64, 307 87, 363 21, 363 97, H02J 900

Patent

active

047452994

ABSTRACT:
An off-line switcher includes an auxiliary winding on the secondary side of the power transformer coupled by a power switch to a secondary voltage source in order to provide uninterruptible power to the output from either a primary AC or a secondary DC source. The power switches coupling both primary and secondary source voltages to the power transformers are driven at identical duty cycles by a common regulation control. Differing transformation ratios between primary and secondary sources of power define different operational ranges and determine flow of power based on the magnitude of the primary source of power.

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