Power Electronics A GTO can be turned on by applying None of these. Positive gate signal. Positive source signal. Positive drain signal. None of these. Positive gate signal. Positive source signal. Positive drain signal. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is 30° to 150°. 30° to 180°. 60° to 120°. 60° to 180°. 30° to 150°. 30° to 180°. 60° to 120°. 60° to 180°. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics To meet high current demand we use SCRs in parallel connection. series connection. both B and C. anti parallel connection. parallel connection. series connection. both B and C. anti parallel connection. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Typical range of thyristor turn OFF time is 3 - 500 µs. 3 - 10 µs. 3 - 50 µs. 3 - 100 µs. 3 - 500 µs. 3 - 10 µs. 3 - 50 µs. 3 - 100 µs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics For series connected SCR’s dynamic equalising circuit consists of series R and diode with C across R. series R and diode with C across R. R and C in series but with diode across C. R and C in series but with diode across R. series R and diode with C across R. series R and diode with C across R. R and C in series but with diode across C. R and C in series but with diode across R. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A thyristor string is made of a no. of SCR connected in series and parallel. The string have volume and current of 11 KV and 4 KA. The voltage and current rating of available SCRs are 1800 V and 1000 A. For a string efficiency of 90 % let the number of SCRs in series and parallel are a and b respectively. Then the value of a and b will be 4, 6. 7, 5. 6, 4. 5, 7. 4, 6. 7, 5. 6, 4. 5, 7. ANSWER DOWNLOAD EXAMIANS APP
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