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Power Electronics

Power Electronics
The latching current of GTO should be of order

 2 A.
 1 A.
 100 mA.
  500 mA.

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Power Electronics
If a latching current for the circuit shown in figure is 2 mA. Obtain the value of minimum width of the property turn ON the SCR?

 3.2 µs
 3.1 µs
 3 µs.
  3.3 µs

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Power Electronics
Materials used in heat sink should have

 high melting point.
 high thermal conductivity.
 large surface area.
  All of these.

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Power Electronics
Gate circuit or triggering circuit of a thyristor is

  lower power circuit.
 may be low power or high power circuit.
 magnetic circuit.
 high power circuit.

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Power Electronics
The typical time of rising time lies between

 40 - 60 µs.
 10 - 20 µs.
 90 - 100 µs.
  1 - 4 µs.

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Power Electronics
When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ?

 Snubber circuit.
 Voltage clamping device.
  Fast acting current limiting device (FACL fuse).
 CB.

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