7/30/2019 PE- Question Bank1

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Chapter: Power Semiconductor Devices

Q.1Explain the operation of SCR using two transistor ananlogy. Obtain the condition for the breakdown of the device.

Q.2 Explain Turn on methods for Thyristor.

Q.3 Draw and

Explain

SCR

in

detail.

Also

draw

and

explain

SCR

IV

characteristics

with

required terms.

Q.4What are the needs os series and parallel operation of thyristors? Explain the problems with series and parallel operation of thyristors and possible solution.

Q.5 Explain dv/dt and di/dt protection circuits breifly.

Q.6List different types of commutation techniques and explain Complementary commutation.

Q.7 What are the various Thyristors ratings?

Q.8Describe the construction and working of IGBT. Also enumerate the advantages of IGBT over BJT and MOSFET.

Q.9What is GTO? Draw and explain GTO structures. Also explain GTO turn off mechanism with desired equation and figures.

Q.10 Draw and Explain the structure of Power MOSFET. Also explain principle of operation and IV characteristics of Power MOSFET.

Chapter: Controlled RectifierQ.11 Explain single phase full (Bridge) controlled rectifier with resistive load.

Q.12Draw and explain single phase full wave controlled rectifier with the inductive load using required waveform and equations. Also explain use and function of free wheeling diode with inductive load.

Q.13Draw and explain single phase full wave controlled rectifier (M2 connection) with the inductive load using required waveform and equations. Also explain use and function of free wheeling diode with inductive load.

Q.14 Explain three phase half wave controlled rectifier with resitive load.

Q.15

Explain three phase fully controlled bridge converter with inductive load using required

waveform and equations.Chapter : DC Chopper

Q.16 Classify the chopper. List all types of chopper and exlpain any two of them.

Q.17What is the principle of operation of step down converter? Show complete analysis of step down converter with RL load with all necessary diagrams.

Q.18What is the principle of operation of step up converter? Show complete analysis of step up converter with RL load with all necessary diagrams.

Q.19 Explain Buck Regulator with all necessary diagrams and equations.Q.20 Explain Boost Regulator with all necessary diagrams and equations.Q.21 Explain Buckboost Regulator with all necessary diagrams and equations.

Chapter: InvertersQ.22 Describe the operation of three phase inverter with 180 degree conduction.

Q.23Explain the principle of operation of pulse width modulated inverters with performance parameters.

Q.24Draw and explain Full bridge inverters. Also give comparison of half bridge and full bridge inverter.

Chapter: ApplicationsQ.25 Desribe Uninterruptible power supply with necessary diagrams in detail.Q.26 Desribe Switch mode power supply with necessary diagrams in detail.Q.27 Explain Battery charger with necessary diagrams.Q.28 List types of Heating mechanism available and exlpain any one of them in detail.