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

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°

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