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Calculate the extinction angle in purely inductive load if the firing angle is π÷4.(a) 315°(b) 145°(c) 345°(d) 285°The question was asked in an interview for job.This key question is from Solid State Controlled Drives topic in chapter Introduction to Solid State Controlled Drives of Electric Drives

Answer»

Correct CHOICE is (a) 315°

Explanation: The extinction ANGLE in the purely inductive load is 2π-∝=360°-45°=315°. 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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