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Power Point

In this page, articles related power points on basic electrical subject, power basic electronics subject, power electronics, electrical machines, wiring, transformer, DC generator, DC motor, transmission lines and special electrical machines are given.



Structure, working and Characteristic of MCT


Structure, working and Two Transistor Analogy of SCR


Characteristic of SCR


Firing Angle Control of SCR By UJT Half Wave Circuit

Firing Angle Control of SCR By UJT Full Wave Circuit


Compare : Holding Current & Latching Current


Compare : SCR and Asymmetrical SCR


Structure and Working of DIAC


Introduction of Transistor

Six Phase Half Wave Uncontrolled Rectifier


UJT - Structure, working and characteristics


UJT As Relaxation Oscillator


Triac-Structure, Working and Characteristic


What do you mean by AC Drive?


Transistor Biasing - Types of Biasing


Base Resistor Method of Biasing


Common Base Transistor Configuration


Common Collector Transistor Configuration


Common Emitter Transistor Configuration


Transistor As An Amplifier


DC Load Line and Operating Point


Stability Factor


What do you mean by Faithful Amplification?


Transformer Coupled Amplifier


Transistor Amplifier circuit


Common Emitter Transistor Amplifier


Direct Coupled Amplifier


Practical Amplifier Circuit


RC Coupled Amplifier


Protection of SCR


Function of Free wheeling diode


Gate Protection of SCR


Heat Sink


Thermal Resistance


Voltage & Current rating of SCR


Protection of Semiconductor Devices by Fuse


Snubber Circuit ( dv/dt protection )


Mounting of SCR



Principle of DC Chopper

Voltage Control in Chopper

Configuration of Chopper

Step up and Step down Chopper

Jones Chopper 

Morgan Chopper

Class A Chopper

Class B Chopper

Class C Chopper

Class D Chopper

Class E Chopper

Speed Control of AC & DC Motor by DC Chopper


Principle of Inverter

Single Phase Half Bridge Voltage Source Inverter ( VSI )

Single Phase Full Bridge Voltage Source Inverter  ( VSI )

Series Inverter

Parallel Inverter

Comparison Between Current Source Inverter and 

Voltage Source Inverter

Compare - MOSFET & Transistor

Compare - SCR and Transistor

Output voltage control of Inverter

Pulse Width Modulation Techniques


Principle of Cycloconverter

Step up Cycloconverter

Advantages, Disadvantages & Applications of Cycloconverter

Single Phase to Single Phase Center Taped Cycloconverter

Single Phase to Single Phase Bridge Configuration Cycloconverter

Function of Intergroup Rector in the Cycloconverter


Industrial Application

Speed Control of Universal Motor


Static AC & DC Circuit Breaker


Three Phase Welding


Resistance Welding Using Triac - Diac


Heating Control


Resistance Welding


Heating Control in the Resistance Welding


Speed Control of Three Phase Induction Motor by Stator Voltage Control


Variable Voltage, Variable Frequency Control of Three Phase Induction Motor


Speed Control of Three Phase Slip Ring Induction Motor by Slip Power Recovery Method


AC Load Control Using Triac & Diac ( Light Dimmer Circuit ) ( Fan Regulator Circuit )

AC & DC Time Delay Circuit

Pulse Transformer


RC Phase Shift Control

RL Phase Shift Control

Electrical Wiring


Tempering in the Energy Meter


Compare Electrification of Residential and Multi Storied Building


Earthing Rules As Per IE1956


Design of Lighting System


Earth Leakage Circuit Breaker ( ELCB )


Colour Code of Cable


Important IE rules No. 50


Maximum demand and Diversity Factor As per NEC


Transmission Line and Distribution System


Types of Conductors


Advantages and Disadvantages of Cable over

Transmission line


Properties of Insulating Material of Cable


Types of Cable


Standard AC Voltage in India

Advantages and Disadvantages of High 

Transmission Line voltage


Function of Earthing Conductor in the Transmission Line


Minimum Clearance between Transmission Line When they cross to each other


String Efficiency of Three suspension insulators


Methods of Improving String Efficiency


Working of Induction Regulator


Classification of Transmission Line


Skin Effect


Compare Feeder, Distributor & Service Mains


Insulation Resistance of Single Core Cable


Most Economical Cable Diameter


Booster Transformer


Series Booster




Principle of Transformer


Ideal Transformer


Transformer on NO Load


Transformer on Load


Standard kVA rating ofTransformer


Per unit Resistance & Per unit Reactance


Testing of Transformer


Parallel Operation of Transformer


Compare Power Transformer & Distribution Transformer


EMF Equation of the Transformer


Losses in the Transformer


Technical Specification of Transformer Provided

by Manufacturer


Type and Routine Test on Transformer


Transformer on NO Load


Transformer on Load


Advantages of Stepped Core over Square Core


Auto Transformer : Saving in Copper Material


Open Circuit Test on Transformer


Synchronous Machine


Hunting Effect in the Synchronous Machine


Torque in the Synchronous Motor


Special Electrical Machines


Zig Zag Transformer


Tertiary Winding


Earthing Transformer


Compare BLDC Motor and Conventional DC Motor


Reluctance Motor


Constant Current Transformer


Constant Voltage Transformer


To separate out hysteresis loss and eddy current loss of DC Machines


To separate out hysteresis loss and eddy current loss in the Transformer


Hopkinson Test


Field Test


Resistance Calculation For DC Shunt Motor Starter


Design of DC Series Motor Starter


Linear Induction Motor


Single Phase Induction Motor


Split Phase Induction Motor


Capacitor Start & Induction Run Motor


Capacitor Start & Run Motor


Compare Split Phase Motor and Capacitor Start - 

Induction Run Motor


Network System


Compare Linear Load and Non Linear Load


Traction System


Advantages of 25 kV AC System

Three Phase Induction Motor

Crawling and Cogging

Torque Slip Curve of the  Three Phase Induction Motor

Induction Motor terminology : Synchronous Speed, Slip, Slip Speed, Rotor Speed


Induction Motor Rotor Parameters : Rotor Emf, Rotor Frequency


Starting Torque in the Three Phase Induction Motor


Full Load Torque in the Three Phase Induction Motor


Compare Starting torque and full load torque in the Starter


DC Generator


Principal of DC Generator


Practical DC Generator


EMF Equation of DC Generator


Parts of DC Generator


Function of Dummy Coil


Types of DC Generator


Function of Equalization Rings


Commutation in the DC Generator


Armature Reaction in the DC Generator


Losses in the DC Generator


Methods of reducing Effect of Armature Reaction


Magnetizing or Open Circuit Characteristic( OCC ) of DC Generator


Power Stages & Condition For Maximum Efficiency in the DC Generator


DC Motor


Principal of DC Motor


Back Emf


Torque and Output power in the DC Motor


Brake Test


Speed Control of DC Series Motor


Speed Control of DC Shunt Motor


Three Point Starter


Four Point Starter


DC Series Motor Starter


Characteristics of DC Series Motor


Characteristic of DC Shunt Motor


Characteristic of DC Compound Motor


Applications of DC Motors


Law of Conversion of Energy


Conditions For Production of EMF


Different Methods of Study of Electrical Machines


Electromechanical Energy Conversion


Swinburne Test


Power System


Series Compensation


Effect of Voltage and Frequency on Active Power




Effect of Harmonics on Power Factor


Compare Capacitor Bank and Single Capacitor


Types of Smoothing Reactor


Function of Shunt Reactor


Voltage harmonics and Current harmonics


Harmonics - Its generation and Causes


How to Mitigate third harmonics?


Voltage Stabilized by Reactive Power 


Importance of Load Curve


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