Power supply device

Details Power supply device Power supply device

H - Electricity

02

M

H02M 1/10 (2006.01) G05F 1/12 (2006.01) H02M 7/155 (2006.01)

Patent

CA 2125996

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.

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