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Calculate the extinction angle in purely inductive load if the firing angle is 13°.(a) 328°(b) 347°(c) 349°(d) 315°This question was addressed to me in homework.This interesting question is from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives

Answer»

Right answer is (b) 347°

Explanation: The EXTINCTION angle in the purely inductive LOAD is 2π-∝=360°-13°=347°. The extinction angle is the angle at which current in the circuit becomes ZERO. The average value of the VOLTAGE in a purely inductive load is zero.



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