ECE :: Power Electronics
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In 180° mode of operation of a 3 phase bridge inverter, two thyristors conduct at one time.
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In a single phase full wave ac regulator the rms value of load current is 20 A load is purely resistive. Then
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Which of these commutation methods uses an auxiliary SCR?
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Two semiconverters are connected in series to form a single phase series converter. The input v = Vm sin ωt and a1 = a2 are the firing angles of the two converters. If a1 = a2 = 0, the dc output voltage is
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In integral cycle control the period of on-off control should be more than mechanical time constant of load.
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A single phase half wave converter is feeding a resistive load. Just before triggering, the voltage across thyristor is
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A.
average thyristor current will be less than 20 A but rms thyristor current will be more than 20 A
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B.
both the average and rms thyristor currents will be less than 20 A
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C.
both the average and rms thyristor currents will be more than 20 A
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D.
rms thyristor current will be 20 A and average thyristor current will be 10 A
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