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Number of switches turned on in 3-phase 120° VSI at a single time are __________

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Number of switches turned on in 3-phase 120° VSI at a single time are __________

(a) 2

(b) 4

(c) 5

(d) 3

This question was addressed to me in a national level competition.

This intriguing question comes from Solid-State Switching Circuits topic in portion Introduction to Solid-State Switching Circuits of Electric Drives

1 Answer

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Best answer
Correct choice is (d) 3

To explain I would say: In 3-phase 120° VSI each phase conducts for 120° and only three switches from different phases conduct at a single time.

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