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Fourier Analysis of 1-Phase Semiconverter

The waveform ...

Question

The waveform shown below consists of source voltage $(V_{S})$ and source current $(I_{S})$ of a rectifier. The input power factor is ______.

0.9

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Solution

The correct option is A 0.9
The waveform of source current and fundamental component of source current $(I_{s 1})$ is

Input p.f. $= \frac{I_{s 1}}{I_{s}} c o s α = \frac{\frac{4 I_{s}}{\sqrt{2} π}}{I_{s}} c o s 0^{o}$

Input p.f. $= 0.9$ lagging

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