Power Electronics

The SCR is turned-off when the anode current falls below

holding current

forward current rating

latching current

breakover voltage

In a SCR circuit, the angle of conduction can be changed by changing

forward current rating

anode current

gate current

anode voltage

For thyristors, pulse triggering is preferred to triggering because

gate dissipation is low

Triggering system is required for a very short duration

pulse system is simplier

all of the options

The normal way to close a SCR is by

gate current

anode current

cathode current

forward current

Which of the following conditions is necessary for triggering system for thyristors?

It must use separate supply

It should be syncronized with the main supply

It should provide a train of pulses

Current must be zerro