gating circuit of 4 scr's in full bridge convertor using microcontroller

[waqas ikhtiar]

hello everyone
i am making project of scr based full bridge convertor using microcontroller to get regulated dc voltages.
i have generated gate pulses for both pairs of scr. now i am required a gating circuit of both pairs to get them fired whenever gate pulse is applied...
can anyone guide me please.....

 

[raksha singh]

first you have to decide when the gate pulse should be triggered.and for this you should know when your zero crossing will take place.

 

[waqas ikhtiar]

that all formalities i have done....i have generated gate pulses acoording to user defined phase angle. now the problem is in hardware , how to connect controller with scr pairs using moc 3020

 

[atripathi]

you need to build a driver circuit for these. For upper devices in bridge you would need isolation also. Try driver ic or build a pulse transformer based driver circuit.