EE6503 POWER ELECTRONICS, Third year, Department of Electrical & Electronics Engineering, First and second Units Questions.

PART A(10*2=20)
1.      Define holding and latching current.
2.      What are advantages of GTO over SCR ?
3.      What are parameters involved in switching loss of power device
4.      What are the methods to turn on the SCR?
5.      What is overlap angle?
6.      Mention some application of converters.
7.      What is dual converter?
8.      What are the performance parameters of phase controlled rectifiers.
9.      Compare MOSFET and BJT
10.  Define snubber circuit.

PART B (16*5=80)

11.  Explain the structure and different modes of operation with the characteristics  of traic.
12.  Explain the switching characteristics of SCR in detail
13.  Discuss in any two forced commutation in detail.
14.  Explain the operation of single phase fully controlled converter with R-load .Derive for average output voltage
15.  Explain the operation principle of single phase dual converter.