15-08-2012, 07:34 PM
Anna University
Department of EEE
Department of EEE
Semester : 5
Year : 3
Department : B.E EEE
Part A
1.Define over lapping period and over lapping angle.
2.What is the effect of source impedance on single phase converters.
3.What are the control stragies of chopper?
4.Difference between constant frequency and variable frequency control stragies of varying the duty cycle of DC chopper.
5.Define the term "duty cycle" of DC chopper.
Part B
6.Explain about Battery Charger. (9 marks)
7(a) Explain Single Phase dual converter with circulating and non-circulating modes. (16 marks)
or
7(b) Describe the principle of step up chopper, Drive an expression for the average o/p voltage in terms of i/p DC voltage and duty cycle. (16marks)