Microprocessor controlled voltage stabilizer

Voltage stabilizers are nowadays one of the most important requirements for all equipment. This paper deals with alternative control techniques for load voltage stabilization. The technique of "shorting-coil" switched by an IGBT in a coupled circuit is used. A microprocessor is used to control the switches to stabilize the load voltage against supply voltage and load current variation. Boosting or bucking effect is performed at low distortion. The controlled stabilizer can reduce the supply voltage distortion and adjust the load voltage within very short time. Full theoretical analysis, simulation and experimental results are presented.