Power supply device

Details Power supply device Power supply device

1994-08-01

1996-07-23

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a transformer or inductor as the final control device

323310, 363 91, G05F 112

Patent

active

055393004

ABSTRACT:
A power supply for an electronic device such as the control circuitry of a thermostat. The power supply has a current transformer with a primary winding in series with the power line that is connected to the heating source, and a secondary winding coupled to the primary winding through a saturable magnetic core. A thyristor connected across the output terminals of the secondary winding establishes a momentary short-circuit condition when the voltage developed across the secondary winding exceeds a preset level in order to prevent the magnet core of the transformer from saturating.

REFERENCES:
patent: 3573579 (1971-04-01), Lewus
patent: 3573605 (1971-04-01), Hart
patent: 3573606 (1971-04-01), Hart
patent: 3770365 (1973-11-01), Lenski
patent: 4870534 (1989-09-01), Harford
patent: 5013990 (1991-05-01), Weber

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