Derive an expression for V(rms)» fundamental and harmonic components of the load voltage as a function of the firing angle (a).

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Supply voltage
a+ a
2n
T1
ig
Gate eerrent pulses
cot
AC Single -Phase
Supply
V = Fixed
f= Fived
Load voltage
cat
', =, sin est
Thyristor voltage
• The supply voltage vs
v;(wt) = Vmsin(wt)
The load voltage vL
for a < wt <n and a + I < wt < 2n
V = {'m sin(wt)
elsewhere
The period is 2n
• The thyristor voltage vr
for 0 < wt < a and î < wt < a + t
Vr = {m sin(wt)
elsewhere
Derive an expression for VL(ms), fundamental and harmonic components of
the load voltage as a function of the firing angle (a).
Transcribed Image Text:Supply voltage a+ a 2n T1 ig Gate eerrent pulses cot AC Single -Phase Supply V = Fixed f= Fived Load voltage cat ', =, sin est Thyristor voltage • The supply voltage vs v;(wt) = Vmsin(wt) The load voltage vL for a < wt <n and a + I < wt < 2n V = {'m sin(wt) elsewhere The period is 2n • The thyristor voltage vr for 0 < wt < a and î < wt < a + t Vr = {m sin(wt) elsewhere Derive an expression for VL(ms), fundamental and harmonic components of the load voltage as a function of the firing angle (a).
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