Alternating current power source with improved phase adjusting c

Details Alternating current power source with improved phase adjusting c Alternating current power source with improved phase adjusting c

1985-09-13

1987-10-27

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 66, 307 87, H02J 906

Patent

active

047031921

ABSTRACT:
An alternating current power source, which is to provide an auxiliary alternating power signal output to a load after switchover from a primary power signal, includes a phase switching circuit which causes the auxiliary power signal to immediately switch phases when a phase imbalance is detected between the primary power signal which existed immediately prior to switchover and the reserve power signal which exists immediately after switchover. In a preferred embodiment the circuit includes a diode and capacitor serially connected between a shutdown output and a synchronizing input of a pulse width modulator integrated circuit.

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