Power Electronics Objective Questions
Power Electronics Objective Questions 1. Questions & Answers on Diodes The P-N Junction Power Diode – Part 1 Power Diode – Part 2 Types of Power Diodes – Part 1...
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Top 100 Power Electronics Questions & Answers
Why IGBT is very popular nowadays? Lower hate requirements Lower switching losses Smaller snubber circuit requirements What are the different methods to turn on the thyristor? Forward voltage triggering Gate...
Crowbar fault protection circuit
Crowbar circuit is used to protect circuit or equipment under fault condition Over Current Causes: Over current flow through thyristors in a circuit due to: Flow of short circuit current...
R R-C Firing Circuits Disadvantages
Firing Circuits: Gate triggering is the most commonly used turn-on method employed to switch on the thyristors. Triggering circuits is also called firing circuits. There are various firing circuits available....
How to test SCR using Multimeter
This post will discuss about testing SCR – Silicon Controlled Rectifier with thte help of Ohmmeter. The thyristor pin assignment diagram of TO-220 package is given for ready reference. Identify the...
How Snubber Circuit works ?
The Snubber circuit is one type of dv/dt protection circuit of the thyristor. With the help of snubber circuit, the false turn-on of a thyristor due to large dv/dt can be...
How to Test TRIAC with Multimeter
How to test TRIAC with Digital Multimeter OR using Ohmmeter? In this short post we will discuss about how to test the Triac. Introduction about Triac: TRIAC = TRIode for Alternating...
Electrical Drives Questions & Answers
What is meant by V/F control? When the frequency is reduced, the input voltage must be reduced proportionally so as to maintain constant flux. Otherwise the core will get saturated resulting...
Power Electronics Interview Questions Part-1
Why thyristors are not preferred now a days for chopper fed DC drives? Since it requires commutation circuit, thyristors are not preferred now a days for chopper fed DC drives....
Basic Power Electronics Interview Questions
What is holding current in SCR? It is the minimum current required to hold the SCR in forward conduction state. When the forward current becomes less than holding current, SCR...