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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Power Electronics
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...
Types of IGBT
Insulated Gate Bipolar Junction Transistor (IGBTs) are normally classified into two types. They are namely (i) Non Punch Through IGBT [NPT-IGBT] (ii) Punch Through [PT-IGBT]. These IGBTs are also referred...
Basics of Thyristor
Thyristor is a three terminal device with four layers of alternating P and N type material (three P-N junctions). The three terminals are Anode, Cathode and Gate. The Thyristor is...
SCR Switching Characteristics
SCR Switching Characteristics or Dynamic Characteristics: The switching characteristics are important particularly at high-frequency, to define the device velocity in changing from conduction state to blocking state and vice versa....
SCR Triggering Methods
Triggering (Turn on) Methods of Thyristor: Triggering:- The turning on Process of the SCR is known as Triggering. In other words, turning the SCR from Forward-Blocking state to Forward-Conduction state...