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Calculate the value of the Input power factor for 1-Φ Full wave bridge rectifier if the firing angle value is 45°.

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Calculate the value of the Input power factor for 1-Φ Full wave bridge rectifier if the firing angle value is 45°.

(a) .65

(b) .64

(c) .61

(d) .63

This question was posed to me during a job interview.

My enquiry is from Solid State Controlled Drives in chapter Introduction to Solid State Controlled Drives of Electric Drives

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Correct choice is (d) .63

For explanation: The value of the input power factor for 1-Φ Full wave bridge rectifier is .9cos(45°)=.63. The input power factor is a product of distortion factor and displacement factor.

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