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Fifth lowest order harmonic present in 3-Φ fully controlled rectifier is __________

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Fifth lowest order harmonic present in 3-Φ fully controlled rectifier is __________

(a) 15^th

(b) 17^th

(c) 13^th

(d) 12^th

The question was asked in an online interview.

This intriguing question originated from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives

1 Answer

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Best answer
Correct choice is (b) 17^th

The best explanation: Only 6k±1 order harmonics are present in 3-Φ fully controlled rectifier. The fifth lowest order harmonic is 17^th harmonic for k=3. Third order harmonics are absent in 3-Φ fully controlled rectifier.

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