GATE EE 2019 Set 1 — Question 40
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Control Systems → Compensators & Controllers → Lag, Lead & Lag-Lead
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Question
The transfer function of a phase lead compensator is given byThe frequency (in rad/sec), at which is maximum, is
Correct answer
(B) √((1)/(3T²))
Solution
For a lead compensator with transfer function , the frequency at which the phase lead is maximum is the geometric mean of the zero and pole frequencies:Given , the zero is at and the pole is at .
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