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Calculate the value of the conduction angle for diode for R-L load with a freewheeling diode if the value of α is 45°. (Continous conduction mode)

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Calculate the value of the conduction angle for diode for R-L load with a freewheeling diode if the value of α is 45°. (Continous conduction mode)

(a) 220°

(b) 225°

(c) 230°

(d) 280°

I had been asked this question during an interview.

I would like to ask this question from Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives

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The correct choice is (b) 225°

Explanation: The conduction angle for diode for R-L load with a freewheeling diode is π+α=180°+45°=225°. R-L load is a current stiff type of load.

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