design firing circuit for thyristor
hasan081043
Posts: 2
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
Vdc=Vm(1+cost)/2*pi
here t=firing angle
Vm=maximum ac voltage
Vdc=output DC voltage
So for Vdc=60V ,Vm=1.414*220=311
t=?
the required firing angle would be 80 degree.
so please help me how i can fire the scr at an angle 80 degree.
degree.The main problem is to fire the thyristor at 80 degree .please sugest me the firing circuit.
for half wave controlled rectifier
Vdc=Vm(1+cost)/2*pi
here t=firing angle
Vm=maximum ac voltage
Vdc=output DC voltage
So for Vdc=60V ,Vm=1.414*220=311
t=?
the required firing angle would be 80 degree.
so please help me how i can fire the scr at an angle 80 degree.
570 x 225 - 23K
Comments
If you use a PS2505L-1-A Transistor Output Optocoupler (for mains hertz detection) with a 10k Pull-up, the line goes high for a short duration around +-5deg
Use 100K instead of 47K resistor with 220v
http://forums.parallax.com/showthread.php/149577-Dual-SSR-inside-a-PowerStrip?p=1220544&viewfull=1#post1220544
this devise can do 50v DC @100mA (bonus 3.3v out)
http://www.mouser.com/ProductDetail/Supertex/SR086SG-G/?qs=sGAEpiMZZMtitjHzVIkrqRqycvdJ8kbVcrhZveqCdEk%3d
and the LR12
http://www.mouser.com/Supertex/Semiconductors/Power-Management-ICs/Voltage-Regulators-Standard/_/N-5cg9g?P=1z12mu3Z1z0jbza