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design firing circuit for thyristor

Guest hasan081043

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Guest hasan081043

The supply is 220v 50Hz ac.I need 60V DC output voltage .For this i need to fire the thyristor at 80

degree.The main problem is to fire the thyristor at 80 degree .please sugest me the firing circuit.
for half wave controlled rectifier
here t=firing angle
Vm=maximum ac voltage
Vdc=output DC voltage

So for Vdc=60V ,Vm=1.414*220=311
the required firing angle would be 80 degree.


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