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A single-phase semi-converter is operated from a 230 V, 60 Hz, AC source. A DMM connected at its output terminals read 219.3 V. Find the value of FF (form factor).

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A single-phase semi-converter is operated from a 230 V, 60 Hz, AC source. A DMM connected at its output terminals read 219.3 V. Find the value of FF (form factor).

(a) 1.24

(b) 0.735

(c) 1.11

(d) 1

The question was asked in an online quiz.

The origin of the question is Single Phase Semi-Converters-3 topic in chapter Converters of Power Electronics

1 Answer

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by (45.1k points)
Correct option is (a) 1.24

For explanation: A DMM always reads the RMS value. Therefore, Vrms = 219.3 V

Vo = √2Vs (1+cosα)/π = 176.72 V

FF = Vrms/Vo = 1.241.

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