GATE EE 2025 Set 1 — Question 47
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Power Electronics → AC-DC Converters → Semi & Full Converters (1φ)
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Question
An ideal sinusoidal voltage source feeds an ideal inductor through an ideal SCR with firing angle . If , then the peak of the inductor current, in ampere, is closest to

Correct answer
(A) 20.71
Solution
Given:
Voltage source
Peak voltage
Angular frequency rad/s
Inductance
Firing angle For an ideal SCR and inductor, the current starts flowing at . The governing equation is:Integrating from to :The peak current occurs when (at ):The closest value is 20.71.
Voltage source
Peak voltage
Angular frequency rad/s
Inductance
Firing angle For an ideal SCR and inductor, the current starts flowing at . The governing equation is:Integrating from to :The peak current occurs when (at ):The closest value is 20.71.
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