GATE EE 2007 | Inverters Question 21 | Power Electronics

GATE EE 2007

MCQ (Single Correct Answer)

-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

True, because being majority carrier devices. $$MOSFETS$$ are voltage driven

True, because $$MOSFETs$$ have inherently anti - parallel diodes

False, because it can be operated both as Current Source Inverter $$(CSI)$$ or a $$VSI$$

False, because $$MOSFETs$$ can be operated as execellent constant current sources in the saturation region

GATE EE 2005

MCQ (Single Correct Answer)

-0.3

The output voltage waveform of a three - phase square-wave inverter contains

only even harmonics

both odd and even harmonics

only odd harmonics

only triple harmonics

GATE EE 2000

MCQ (More than One Correct Answer)

-0.3

Triangular $$PWM$$ control, when applied to a $$BJT$$ based three phase voltage source inverter, introduces.

low order harmonic voltages on the $$dc$$ side.

very high order harmonic voltage on the $$dc$$ side

low order harmonic voltage on the $$ac$$ side

very high order harmonic voltage on the $$ac$$ side

GATE EE 1999

MCQ (Single Correct Answer)

-0.3

A $$PWM$$ switching scheme is used with a three phase inverter to

Reduce the total harmonic distortion with modest filtering

Minimize the load on the $$DC$$ side

Increase the life of the batteries

Reduce low order harmonics and increase high order harmonics

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Electric Circuits

Network Elements Network Theorems Three Phase Circuits Transient Response Sinusoidal Steady State Analysis Graph Theory Two Port Networks

Electromagnetic Fields

Time Varying Fields Electrostatics Magnetostatics

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Linear Time Invariant Systems Continuous and Discrete Time Signals Continuous Time Signal Fourier Transform Continuous Time Periodic Signal Fourier Series Discrete Time Signal Z Transformation Miscellaneous Continuous Time Signal Laplace Transform Sampling Theorem

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Power System Analysis

Parameters and Performance of Transmission Lines Power Generation Cost Power System Stability Symmetrical Components and Symmetrical and Unsymmetrical Faults Circuit Breaker Switch Gear and Protection Per Unit System Load Flow Studies High Voltage Dc Transmission Generating Power Station

Electrical and Electronics Measurement

Error Analysis and Measurement Basic of Indicating Instruments Potentiometer and Instrument Transformers Measurement of Resistance and A.C Bridges Measurement of Energy and Power Digital Voltmeters Questions Cathode Ray Oscilloscope

Analog Electronics

Diode Circuits and Applications Bjt and Mosfet Biasing Small Signal Modeling Feedback Amplifiers and Oscillator Circuits Operational Amplifier Frequency Response 555 Timer

Control Systems

Block Diagram and Signal Flow Graph Polar Nyquist and Bode Plot State Variable Analysis Basics of Control System Routh Hurwitz Stability Time Response Analysis Root Locus Techniques Controller and Compensator

Power Electronics

Choppers and Commutation Techniques Ac Voltage Controllers Single and Three Phase Rectifier Power Semiconductor Devices Inverters

Digital Electronics

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