Best Portable Generator – Our Top Picks of 2019

A great portable generator is one that you can rely on to get you through emergencies. It needs to be reliable, durable, and long lasting. On the flipside, a poorly-made generator can let you down just when you need it most. Today, we’re going to review the Top 7 Portable Generators – so that you … Read more

Core Type Transformer

As we know there are mainly two types of transformer categorised by its shape of the magnetic core. These are core type transformer and shell-type transformer. We shall discuss here the core type transformer. The core of single phase core type transformer is single window core. This means there are two limbs as shown in … Read more

Electric Machines Transformers Generators and Motors

The machines which are operated in relation with electrical energy are called electric machines or electrical machines. In electrical machines, either input or output or both can be electricity. Types of Electrical Machines The electric machines are of three main types, transformer, generator, and motor. Electrical Transformer: In the transformer, both input and output are … Read more

Efficiency of Transformer

Introduction of Efficiency of Transformer Transformers form the most important link between supply systems and load. Transformer’s efficiency directly affects its performance and aging. The transformer’s efficiency, in general, is in the range of 95 – 99 %. For large power transformers with very low losses, the efficiency can be as high as 99.7%. The … Read more

Eddy Currents Theory and Applications of Eddy Current

Introduction of Eddy Current According to Lenz’s law, a conducting loop when subjected to varying magnetic field gets an emf induced into it causing flow of current in a direction opposing the change causing it. The case goes similar to when instead of a conducting closed loop, the change in magnetic field through a conducting … Read more

Working Principle of Electric Generator

When a conductor moves in a magnetic field, an emf is induced across the conductor. This is the only basis on which each and every rotating electric generator works (such as portable generators). According to Faraday’s law of electromagnetic induction, when a conductor links with a changing flux, it will have an induced emf across … Read more

Brushless DC Motors

Brushless DC motor may be described as an electronically commuted motor which does not have brushes. These types of motors are highly efficient in producing a large amount of torque over a vast speed range. In brushless motors, permanent magnets rotate around a fixed armature and overcome the problem of connecting current to the armature. … Read more

Squirrel Cage Induction Motor: Working Principle & Applications

A 3 phase squirrel cage induction motor is a type of three phase induction motor which functions based on the principle of electromagnetism. It is called a ‘squirrel cage’ motor because the rotor inside of it – known as a ‘squirrel cage rotor’ – looks like a squirrel cage. This rotor is a cylinder of … Read more

Synchronous Motors: Applications, Starting Methods & Working Principle

Electrical motors are an electro-mechanical device that converts electrical energy to mechanical energy. Based on the type of input we have classified it into single phase and 3 phase motors. The most common type of 3 phase motors are synchronous motors and induction motors. When three-phase electric conductors are placed in certain geometrical positions (i.e. … Read more

Transformer Testing | Type Tests and Routine Tests of Transformer

For confirming the specifications and performances of an electrical power transformer it has to go through a number of testing procedures. Some tests are done at a transformer manufacturer premises before delivering the transformer. Transformer manufacturers perform two main types of transformer testing – type test of transformer and routine test of transformer. Some transformer … Read more