A 3-phase voltage source inverter is operated in 180 conduction mode. Which one of the following

A 3-phase voltage source inverter is operated in 180o conduction mode. Which one of the following statements is true ? 

(A) Both pole-voltage and line-voltage will have 3rd harmonic components (B) Pole-voltage will have 3rd harmonic component but line-voltage will be free from 3rd harmonic (C) Line-voltage will have 3rd harmonic component but pole-voltage will be free from 3rd harmonic (D) Both pole-voltage and line-voltage will be free from 3rd harmonic components

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Answer :

A 3-phase voltage source inverter is operated in 180o conduction mode. Which one of the following statements is true ? 

(A) Both pole-voltage and line-voltage will have 3rd harmonic components (B) Pole-voltage will have 3rd harmonic component but line-voltage will be free from 3rd harmonic (C) Line-voltage will have 3rd harmonic component but pole-voltage will be free from 3rd harmonic (D) Both pole-voltage and line-voltage will be free from 3rd harmonic components

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