1. inverter
2. rectifier
3. multiquadrant chopper
4. cycloconverter
multiquadrant chopper
1. High current
2. High rate of rise of current
3. High temperature rise
4. High rate of rise of voltage
High current
1. both turn-off power loss and turn-off time decreases
2. turn-off power loss decreases but turn-off time increases
3. turn-off power loss increases, but turn-off time decreases
4. none of these
turn-off power loss decreases but turn-off time increases
1. 0 V
2. 10 V
3. 5 V
4. 2.5 V
5 V
1. amplify the power of the triggering pulse
2. provide electrical isolation
3. reduce the turn on time of the thyristor
4. avoid spurious triggering of the thyristor due to noise
provide electrical isolation
1.
2. zero
3.
4. none of these
zero
1. gate dissipation is low
2. pulse system is simpler
3. triggering signal is required for short duration
4. all of these
all of these
1. to provide control signal to trigger SCR
2. to make SCR on
3. to make SCR off
4. to amplify anode current
to make SCR off
1. rectangular pulse of high amplitude and narrow width
2. rectangular pulse of low amplitude and wide width
3. triangular pulse
4. trapezoidal pulse
rectangular pulse of high amplitude and narrow width
1. expedite the generation of triggering pulses.
2. delay the generation of triggering pulses.
3. provide a constant voltage to VJT to prevent erratic firing.
4. provide a variable voltage to VJT as the source voltage changes
provide a constant voltage to VJT to prevent erratic firing.