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Power Electronics

Power Electronics
If the anode current is 800 A, then the amount of current required to turn off the GTO is about

 20 A.
 600 A.
 400 A.
  200 A.

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Power Electronics
The maximum di/dt in a SCR is

  Both A and B.
 Directly proportional to inductance in the circuit.
 Directly proportional to supply voltage.
 Inversely proportional to supply voltage.

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Power Electronics
Which of the following is used in SCR to protect from high dV / dt?

 Fuse.
 Equalizing circuit.
 Circuit breaker.
  Snubber circuit.

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Power Electronics
Latching current for an SCR inserted between a dc voltage source of 200 V and load is 100 mA. Compute the minimum rate of width pulse required to turn ON the SCR in case load consists of R = 20 Ω in series with L = 0.2 H.

 200 µs.
 150 µs.
 300 µs.
  100 µs.

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Power Electronics
In a P1N1P2N2 thyristor which layer is less doped ?

 P2.
  N1.
 P1.
 N2.

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Power Electronics
After peak point, the UJT operates in the ___________ region.

Cut-off
None of these
Negative resistance
Saturation

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