The average output voltage of a half-controlled bridge converter is measured to be 103.53V.
The average output voltage of a half-controlled bridge converter is measured to be 103.53V. If the bridge is supplied from a 230V, 50 Hz sinusoidal source, the triggering angle of the thyristors in the bridge is approximately
Right Answer is:
90°
SOLUTION
Given,
Average output voltage (Vo) = 103.53V
RMS voltage = 230 V
Max Voltage (Vm) = √2 × RMS voltage
Vm = 325.22 V
The average output voltage of the half-converter bridge rectifier is given by
$\begin{array}{l}{V_o} = \dfrac{{{V_m}}}{\pi }(1 + \cos \alpha )\\\\103.53 = \dfrac{{325.22}}{{3.14}}(1 + \cos \alpha )\end{array}$
(1 + cosα) = 325.22/325.08
(1 + cosα) ≅ 1
cosα = 0
α = cos−1 0
α = 90°