ECE :: Power Electronics
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A two winding transformer is feeding a single phase half wave rectifier circuit. The load is purely resistive. The rms value of transformer secondary current is Is and rms value of load current in Irms. Then
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The terminals of a power BJT are called
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In single phase half wave regulator, the average current over one full cycle
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The dynamic equalising circuit consists of a series combination of capacitor C and resistor RC across each thyristor. This resistance RC (along with parallel connected diode)
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A single phase semiconverter is feeding a highly inductive load and has freewheeling diode across the load. The waveshapes of output voltage and output current
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Current derating may be necessary when thyristors are operating in
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If duty cycle is a and the load is a resistance R, the rms value of output voltage is
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Assertion (A): Power transistor has lower switching time than SCR
Reason (R): Power transistor has greater switching time than SCR
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A 3 kV circuit uses SCR of 800 V rating. If derating is 25%, the number of SCRs in series is
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