1
GATE EE 2007
MCQ (Single Correct Answer)
+1
-0.3
''Six $$MOSFETS$$ connected in a bridge configuration (having no other power device) MUST be operated as Voltage Source Inverter $$(VSI)''.$$ This statement is
A
True, because being majority carrier devices. $$MOSFETS$$ are voltage driven
B
True, because $$MOSFETs$$ have inherently anti - parallel diodes
C
False, because it can be operated both as Current Source Inverter $$(CSI)$$ or a $$VSI$$
D
False, because $$MOSFETs$$ can be operated as execellent constant current sources in the saturation region
2
GATE EE 2005
MCQ (Single Correct Answer)
+1
-0.3
The output voltage waveform of a three - phase square-wave inverter contains
A
only even harmonics
B
both odd and even harmonics
C
only odd harmonics
D
only triple harmonics
3
GATE EE 2000
MCQ (More than One Correct Answer)
+1
-0
Triangular $$PWM$$ control, when applied to a $$BJT$$ based three phase voltage source inverter, introduces.
A
low order harmonic voltages on the $$dc$$ side.
B
very high order harmonic voltage on the $$dc$$ side
C
low order harmonic voltage on the $$ac$$ side
D
very high order harmonic voltage on the $$ac$$ side
4
GATE EE 1999
MCQ (Single Correct Answer)
+1
-0.3
A $$PWM$$ switching scheme is used with a three phase inverter to
A
Reduce the total harmonic distortion with modest filtering
B
Minimize the load on the $$DC$$ side
C
Increase the life of the batteries
D
Reduce low order harmonics and increase high order harmonics
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