Dual input voltage power supply

Details Dual input voltage power supply Dual input voltage power supply

1984-11-05

1987-03-31

Pellinen, A. D.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Diverse or unlike electrical characteristics

307130, 363143, 323299, H02M 500

Patent

active

046545387

ABSTRACT:
A power supply circuit including A.C. input of either 110 volts or 220 volts coupled to a full diode bridge, across the output of which are provided series connected capacitors across which the desired system operating voltage appears. A voltage-controlled current generator for driving a diac and triac is connected between the input supply and the bridge capacitors. At 110 volt input, the current generator closes the triac and the circuitry operates as a voltage doubler to provide the desired system voltage. At 220 volt input, the triac remains open, and the full bridge and capacitors provide the same desired system voltage.

REFERENCES:
patent: 3713018 (1973-01-01), Tscheuschner
patent: 3900787 (1975-08-01), Koster
patent: 4241399 (1980-11-01), Ikawa

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