Which of following devices has highest di/dt and dv/dt capability?
Which of following devices has highest di/dt and dv/dt capability?
A. SIT
B. SITH
C. GTO
D. SCR
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In a 3 phase CSI, if the required line output voltages are balanced and 120 degree out of phase, then the chopping angles are used to eliminate only the harmonics at frequencies
In a 3 phase CSI, if the required line output voltages are balanced and 120 degree out of phase, then the chopg angles are used to eliminate only the harmonics at frequenciesA. 5
B. 7
C. 11
D. All of theseVoltage commutation circuit can be converted into a current commutation by interchanging the positions of____________?
Voltage commutation circuit can be converted into a current commutation by interchanging the positions of____________?A. Diode and capacitor
B. Capacitor and SCR
C. Inductor and capacitor
D. Capacitor and loadSwitching frequency of SITH is____________?
Switching frequency of SITH is____________?A. 5 KHz
B. 10 KHz
C. 60 KHz
D. 100 KHzAn RC snubber network used in BJT__________?
An RC snubber network used in BJT__________?A. Divert the collector current during turn – off
B. Improves the reverse bias safe operating area
C. Dissipates a fair amount of switching power
D. All of theseAC power in a load can be controlled by using_____________?
AC power in a load can be controlled by using_____________?A. two SCR’s in parallel opposition
B. two SCR’s in series
C. three SCR’s in series
D. four SCR’s in seriesUnipolar modulation is generally used in____________?
Unipolar modulation is generally used in____________?A. AC – AC converters
B. AC – DC converters
C. DC – AC converters
D. DC – DC converters