Battery Charger Circuit Using Scr Can Be Used. The step down voltage is given to the scr for rectification and scr rectifies ac main voltage. Scrs are the ideal power device choice for a battery charger because they can both regulate battery charging voltage and prevent fault current when the battery is inadvertently connected reverse.
By this we. The transformer t1 can be 230v primary 18v 3a secondary step down transformer. I have actually connected mine reverse and thought that the charger was inoperative until i realized what i had done.
We can turn off the scr by decreasing the current to less than holding current or we have another method called force communication in this we discharge a capacitor in parallel with scr to make it turn off.
Circuit 3 is a full converter that uses four scrs full converters are used for regenerative applications rather than simple battery chargers. It can also be used as an automatic battery charger specially in driving because it is a portable circuit and can be carried anywhere. We can turn off the scr by decreasing the current to less than holding current or we have another method called force communication in this we discharge a capacitor in parallel with scr to make it turn off. Flash function because the regulator circuit derives its power from the battery it cannot charge if the battery is totally dead.
