ECE :: Power Electronics
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A single phase half wave converter is used to charge a battery of 50 V. The thyristor is continuously fired by dc signal. Input voltage is v = Vm sin ωt. The thyristor will conduct
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In a 3 phase semiconverter, the firing frequency is
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Present day HVDC converters are all
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A single phase full converter gives maximum and minimum output voltage at firing angles of
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A thyristor has its gate current zero. To start conduction the forward voltage must exceed
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Assertion (A): Snubber circuit has an RC series circuit in parallel with SCR
Reason (R): Voltage across a capacitor can not change instantaneously.
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In dielectric heating, the thyristor circuits consist of
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Assertion (A): A cycloconverter may be line commutated or forced commutated
Reason (R): A step up cycloconverter requires forced commutation.
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