Electrical Laws

Ohm's Law Coulomb's Law Kirchoff's Law Faraday's Law Ampere's Law Joule's Law Lenz's Law Biot Savart Law

Electrical Theorems

Thevenin Theorem Nortons Theorem Super Position Theorem Reciprocity Theorem Compensation Theorem Maximum Power Transfer Millmans Theorem Tellegans Theorem

Electrical Rules

Flemings Left Hand Rule Flemings Right Hand Rule Cork Screw Rule

Electrical Network

Network Terminologies

Electrical Terms

Electrical Terms Materials Capacitors Resistors Inductor Self Inductance Mutual Inductance Magnetic Flux Magnetic Characteristics EMF MMF Permeability Sources Reluctance Torque

Electrical Transformer

Transformers How Transformer Works Transformer Classifications Types Transformers Core Type Transformers Ideal Transformers Parallel Operation Transformer Cooling Transformer Forces Transformer Losses Transformer Testing Transformer Bushing Transformer Windings

Types of Transformer

Auto Transformer Current Transformer Potential Transformer Rectifier Transformer Converter Transformer

AC Motor

Stator and Rotor Three Phase Induction Motor Induction Motor Transformer

AC Generator

AC Generators Alternator Stator Construction Alternator Rotor Construction Alternator - Parallel Operation Synchronizing AC Alternator Losses in Alternator

DC Motors

DC Motors Commutator Braking of Electric Motors Dynamic Rheostatic Braking Regenerative Braking Plugging Braking Speed Control DC Motor Losses DC Motors

Types Of DC Motor

DC Motors Types DC Series Motors DC Shunt Motors DC Compound Motor Brushless DC Motors Permanent Magnet DC Motor

Starter For DC Motors

Starters DC Motors

DC Generator

DC Generator Types DC Generators Sparking DC Generators Why Generator Overloading Losses DC Generators

Parallel Operation

PO - DC Generator Series DC Generator Shunt DC Generator Compound DC Generator
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Transformer Losses

The transformer has no moving parts, so that its efficiency is much higher than that of rotating machines.

Core Losses

Core losses are hysteresis and eddy-current losses resulting from alternations of magnetic flux in the core. The core loss is a constant loss for a transformer operated at constant voltage and frequency as are all power frequency equipment.

Copper Losses

Copper loss occurs in winding resistance when the transformer carries the load current.

Stray load Losses

Stray load loss largely results from leakage field inducing eddy currents in the tank wall and conductors.

Dielectric Losses

Dielectric losses occurs in dielectric materials such as oil ducts, papers etc in varing the electric field. Here, the losses are dissipated in the form of heat energy. Dielectric losses depend on frequency and the dielectric materials of Transformer.

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