Voltage supply circuit

Details Voltage supply circuit Voltage supply circuit

1989-08-03

1991-05-14

Scott, J. R.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 75, H02J 900

Patent

active

050158708

ABSTRACT:
A voltage supply circuit has an energy reserve, which is charged by a voltage transformer, and a comparator circuit, which controls switching circuit components. When the supply voltage is at its nominal value, a first switching circuit component is closed, with the result, that the energy reserve is operated in open circuit and is charged by the voltage transformer. When the supply voltage drops below a threshold, the comparator circuit opens the first switching circuit component and closes a second switching circuit component with the result that, at this point, the charged energy reserve is available for the voltage supply to the circuit configuration normally supplied with voltage from the supply voltage and the voltage transformer is disconnected from the supply voltage.

REFERENCES:
patent: 4354118 (1982-10-01), Spencer
patent: 4528459 (1985-07-01), Wiegel
patent: 4730121 (1988-03-01), Lee et al.

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