This blog post summarize SCR Triggering Circuit
To obtain the gate pulse for the single phase converters.
Circuit Diagram for SCR Triggering Circuit
Procedure of SCR Triggering Circuit
☞Time (X) Axis:5ms/div
☞Voltage (Y) Axis: 20V/div
☞Probe:1:10 CRO Probe is suitable one.
☞Ensure the 15V Power Supply is in proper with Tester.
☞Ensure the CRO is working properly with probe checking and proper ground line axis.
Pulse for SCR
☞Connect the 15VAC to power jack and ensure the voltage is around 15V using test point.
☞Then connect the Ref AC Input from the power controller circuit.
☞The test points are listed below.
– +15V – Indicates 15VDC.
– TP – Indicates Comparison pulse.
– TV – Indicates Control Voltage.
– TR – Indicates Ramp Voltage.
– TG – Indicates common Ground.
– (G1,K1); (G2,K2); (G3,K3) & (G4,K4) – Indicates Pulse for Scr.
☞α Potentiometer is used for control voltage variation (i.e) firing angle variation.
☞Another potentiometer is used for Ramp control.
☞*If the connections are wrong the kit will get damage
☞*These pulse can be used for