RC Triggering

Power Electronics

1. (+ Power Electronics

RC Triggering of SCR

By Prof. Hitesh Dholakiya

Engineering Funda Android App Power Electronics YT Playlist

2. Outlines of Session

Basics of RC Triggering of SCR
Full wave and Half wave RC Triggering of SCR

Circuit of RC Triggering of SCR
Working of RC Triggering of SCR

Waveforms of RC Triggering of SCR

Engineering Funda Android App Power Electronics YT Playlist

3. Basics of LCD

“+ In RC triggering of SCR, we take Resistor and Capacitor elements to trigger SCR.
“ Value of Resistor and Capacitor is very important to define firing angle of SCR.

“ RC time constant defines, firing angle of SCR.

Engineering Funda Android App Power Electronics YT Playlist

4. Types of RC Triggering of SCR
% In this session | have explained two basic circuits of RC Triggering of SCR
1. Half wave RC Triggering of SCR
2. Full wave RC Triggering of SCR

5. Working RC Triggering of SCR

% By RC Triggering we can trigger SCR with firing angle ranges from 0 to 180.

% We can change firing angle by changing value of Resistor R.

6. Half wave RC triggering of SCR circuit

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7. Half wave RC triggering of SCR Waveforms

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rea

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LOAD +
+ T
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AD Vr
Vs=V„sinot Dy
Vea ac
+

8. RC triggering of SCR Waveforms with different

values of Resistor R

For High Value of R

For Low Value of R

Vs 1 Vmsinot

9. Full wave RC triggering of SCR circuit

Cc
Vs=V psinot Da |

10. Full wave RC triggering < of SCR Loue

LOAD’

c
V=V„sinot

11. RC triggering of SCR Waveforms with different
values of Resistor R

For High Value of R For Low Value of R

e msinot Vmsinot