Power Electronics Insem Important Questions

Introduction: Power Electronics plays a pivotal role in shaping the future of businesses and organizations in today's dynamic and competitive world. At Savitribai Phule Pune University (SPPU), the Power Electronics Insem (Internal Semester) examination holds great importance in evaluating students' understanding of this field. To excel in these examinations, it is crucial for students to be well-prepared, and one key aspect of this preparation is familiarizing themselves with important questions. In this essay, we will explore the significance of understanding and practicing important questions in Power Electronics Insem at SPPU University.

Subject:Power Electronics(Code:303142) Class:TE 

a) Explain the triggering of SCR using UJT relaxation oscillator

b) Sketch the static characteristics of SCR with the help of dingram.Explain various modes of operation.

Or

a) Explain the protection method of SCR

b) Explain triggering of TRIAC using DIAC with neat circuit diagram

Or

a)Describe the principle of step down chopper. Derive an expression for the average output voltage in terms of input voltage and duty cycle.State the assumptions made.

b) Draw and explain the static characteristics of MOSFET.Identify the Saturation.Cut-off and Active region.

Or

a)A step up chopper with a pulse width of 100us is operating from 230 V DC supply. Compute the average value of load voltage for a chopping frequency of 2000Hz

b) Draw and explain output and transfer characteristics of MOSFET

Or

a) Discuss the operation of the DC-DC Boost

converter and prove that its output voltage is

always greater than the input voltage.Write

the expression for average output voltage