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For successful commutation circuit turn-off time ______ device turn-off time.

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For successful commutation circuit turn-off time ______ device turn-off time.

(a) <

(b) >

(c) =

(d) ~

The question was asked in an online interview.

Asked question is from Solid-State Devices in portion Introduction to Solid-State Devices of Electric Drives

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The correct answer is (b) >

Explanation: For successful commutation circuit turn-off time must be greater than the device turn-off time. The excess stored charged carriers should be removed from the gate junction in order to avoid false triggering.

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