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In three-level modulation

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in Power Electronics by (27.1k points)
In three-level modulation

(a) the output voltage is zero in the first half cycle.

(b) the output voltage either zero or positive in the first half cycle.

(c) the output voltage either zero or negative in the first half cycle.

(d) the output voltage either zero, positive or negative in the first half cycle.

The question was posed to me during an online exam.

The above asked question is from Harmonic Reduction topic in portion Inverters of Power Electronics

1 Answer

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by (45.1k points)
Right answer is (d) the output voltage either zero, positive or negative in the first half cycle.

To elaborate: In stepped wave inverters, one of the inverters is so gated as to obtain a three level modulation.

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