25-08-2017, 09:32 PM
Abstracts: This is an industry defined project which present efficient protection circuit for single phase AC contactor coil using solid state voltage stabilizer. Contactor is an electromechanical switch which play the role of connector. Contactor coil fails due to fluctuation in main supply and disconnection of contactor leads to uncontrolled process shutdown which fails another power equipment so here stabilizer give protection to it. Solid state voltage stabilizer is divided between two part control circuit and power circuit. Control circuit control the PWM inverter output which is generated according to required voltage for maintaining constant output voltage. Voltage regulation done with the help of buck-boost transformer and inverter. Stabilizer provide constant 230v to the contactor.