Static Voltage Stabilizer Using Modified SPWM Technique Controlled AC Chopper

Voltage stabilizer for ac supply has become necessity for domestic as well as industrial applications. It retains devices / instruments from supply voltage impurities. Among all the available voltage stabilizer technologies, IGBT based static voltage stabilizer is the most advanced and fast responsive technique to get required voltage regulation. This paper presents design and operation of efficient and reliable method to use buck-boost transformer in series with ac chopper to achieve an effective voltage control using modified sinusoidal pulse width modulation. Simulation analysis of the presented stabilizer depicts satisfactory behavior.