Explain the working of voltage commutated chopper with aid of circuit diagram and necessary waveforms. Derive an expression for its output voltage?

1115

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Explain what is an excitation table?

1173

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What are the types of commutation? (Or) turn off methods?

1052

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What is characteristic of ideal opamp?

1034

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What are the advantages of free wheeling diodes in a controlled in a controlled rectifier?

1067

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What is meant by duty-cycle?

1127

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What is commutation angle or overlap angle?

1441

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Explain what are the basic logic elements?

1292

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What is 555 timer?

1081

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What are the disadvantages of the harmonics present in the inverter system?

1284

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Why do ics need small power for their operation?

1094

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Name the cmos version of the 555 timer.

1077

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What are the advantages of sequence control of ac voltage regulators?

1161

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What is meant by step-up cyclo-converters?

1124

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What are the different operation regions of the thyristor (scr)?

1286

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