Power supply connected in parallel with solid state switch for p

Details Power supply connected in parallel with solid state switch for p Power supply connected in parallel with solid state switch for p

1994-12-15

1996-08-27

Wong, Peter S.

Electricity: power supply or regulation systems

Input level responsive

Phase controlled switching using electronic tube or a three...

315194, G05F 502

Patent

active

055504639

ABSTRACT:
A power supply for controlling average power to a load, such as an electric light, heater or motor, comprising a solid state switch connected in series with the load, a power supply connected in parallel with the solid state switch, and a control circuit connected intermediate the power supply and solid state switch for causing the solid state switch to conduct current through the load for a predetermined portion of each AC power cycle. The power supply collects charge whenever the solid state switch is non-conducting. According to the preferred embodiment, a current overload detector and zero crossing detector are also provided for increased reliability and precise definition of the solid state switch conduction timing.

REFERENCES:
patent: 4478468 (1984-10-01), Schoen
patent: 4634957 (1987-01-01), Hollaway
patent: 4928055 (1990-05-01), Kaieda et al.
patent: 5030890 (1991-07-01), Johnson
patent: 5164636 (1992-11-01), Allaire
patent: 5264761 (1993-11-01), Johnson

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