Patent ID: 6057674
Filing Date: 2000-05-02
Classification: G05F,H02M,H05B

Abstract:
An AC power regulation system for controlling load power to a load, said power regulation system having an input for coupling to an AC power source and having an output for coupling to the load, said power regulation system comprising:a controllable switch coupled in series between the input and the output;circuitry for supplying selectable capacitance coupled in parallel with the controllable switch;circuitry for turning-on the controllable switch to a conducting state;circuitry for turning-off the controllable switch to a non-conducting state; andswitch control circuitry for generating control signals to control said circuitry for turning-on and said circuitry for turning-off such that the controllable switch is turned on to a conducting state at a selected turn-on time, and is turned off to a non-conducting state at a selected turn-off time prior to a line current zero-crossing point, said turn-off time being selected by said switch control circuitry in response to a reference signal.