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Power Electronics
Choppers and Commutation Techniques
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Single and Three Phase Rectifier
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Power Semiconductor Devices
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Ac Voltage Controllers
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Inverters
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1
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
2
GATE EE 1995
MCQ (Single Correct Answer)
+1
-0.3
An inverter capable of supplying a balanced three - phase variable voltage variable frequency output is feeding a three - phase induction motor rated for $$50$$ $$Hz$$ and $$440V.$$ The stator winding resistances of the motor are negligible small. During starting, the current inrush can be avoided without sacrificing the starting torque by suitably applying.
A
Low voltage at rated frequency
B
Low voltage keeping the $$V/f$$ ratio constant
C
Rated voltage at low frequency
D
Rated voltage at rated frequency
3
GATE EE 1995
Numerical
+1
-0
A single phase Inverter with square wave output voltage will have in its output waveform a fifth harmonic component equal to ______ percentage of the fundamental
Your input ____
4
GATE EE 1994
True or False
+1
-0
A line - commutated inverter changes $$dc$$ voltage to $$ac$$ voltage
A
TRUE
B
FALSE
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Questions Asked from Marks 1
GATE EE 2017 Set 1 (2) GATE EE 2017 Set 2 (1) GATE EE 2011 (1) GATE EE 2008 (1) GATE EE 2007 (2) GATE EE 2005 (1) GATE EE 2000 (1) GATE EE 1999 (1) GATE EE 1995 (2) GATE EE 1994 (1) GATE EE 1993 (1)
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement