SCR COMMUTATION PART 2

SCR COMMUTATION PART 2
NATURAL COMMUTATION
FORCED COMMUTATION

1. POWER ELECTRONICS SCR COMMUTATION PART 2

2. STEPS Turn ON auxiliary SCR This will charge capacitor with pper plate POSITIVE 2. Now turn ON main SCR, this will pass main load current & also lead to discharge of capacitor and then charging of it with reverse polarity, that is upper plate NEGATIVE, via L & diode D 3. Now when we wish to turn OFF main SCR, then turn ON aux SCR 4. This will put reverse charged capacitor across main SCR 5. This will lead turn OFF main SCR 6. Above steps are then repeated