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Calculate the value of the Input power factor for 3-Φ Fully controlled rectifier if the firing angle value is 70°.

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Calculate the value of the Input power factor for 3-Φ Fully controlled rectifier if the firing angle value is 70°.

(a) .32

(b) .38

(c) .31

(d) .33

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This interesting question is from Solid State Controlled Drives in section Introduction to Solid State Controlled Drives of Electric Drives

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The correct answer is (a) .32

Best explanation: The value of the input power factor for 3-Φ Fully controlled rectifier is .95cos(70°)=.32. The input power factor is a product of distortion factor and displacement factor.

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