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.Management Sciences
Category: Power Electronics
A combination of synchronized leading edge and trailing edge modulation has also been used to control a____________?
A. Boost single – phase power factor converter
B. A buck dc – dc converter to reduce ripple in the intermediate dc bus capacitor
C. Both A. and B.
D. None f these
SCRs are used in series to meet_______________?
A. high current demand
B. low voltage demand
C. low current demand
D. high voltage demand
To detect an over – current fault condition, the most reliable method is to connect a_____________?
A. Current sensor across IGBT
B. Voltage sensor across IGBT
C. Current sensor in series with IGBT
D. Voltage sensor in series with IGBT
Regulator sampling PWM is usually used in___________?
A. High power inverters
B. Rectifiers
C. Low power inverters
D. Only A. and B.
MOSFET stands for______________?
A. Metal – oxide semiconductor field effect transistor
B. Molybdenum – oxide semiconductor field effect transistor
C. Metal – oxide silicon field effect transistor
D. Metal – oxide semiconductor field effect transmitter
If the gate voltage of an SCR is removed, then the_______________?
A. anode current decreases
B. anode current does not decrease at all
C. anode current increases
D. cathode current increases
During which time maximum conduction spreading take place in the thyristor during turn ON?
A. Delay time
B. Spread time
C. Rise time
D. Same for every case
(more…)
A single phase full bridge inverter can operate in load commutation mode in case load consists of____________?
A. RL.
B. RLC underdamped.
C. RLC overdamped.
D. RLC critically damped.
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