Patent ID: 6181031
Filing Date: 2001-01-30
Classification: H05B

Abstract:
A system for driving a reactive load, comprising:means for controlling a supply of the load, for supplying variable quantities of energy to the load in a predetermined manner;a controllable electronic switch;a reactive component connected to the load by means of the controllable electronic switch, the reactive component forming a resonant circuit with the load when the electronic switch is closed;means for activating the electronic switch; anda control unit connected to the controlled supply means and to the activation means in order to coordinate their operation in accordance with a predetermined program which defines the supply of energy to the load, wherein the means for activating the electronic switch comprise a detector for detecting the zero-crossing of a sinusoidal electrical quantity in phase with an electrical quantity in the resonant circuit and means for opening the electronic switch when the detector detects a zero-crossing of the sinusoidal electrical quantity.