## Electric Traction – How does Electric Traction Work?

Electric traction means using the electric power for traction system i.e. for railways, trams, trolleys etc. Now a day, magnetic traction is also used for bullet trains. How does Electric Traction Work?   Block Diagram: In OHE, or overhead electrification systems, the supply of electricity...

## Corona Ring – How does it Work?

What is a Corona Ring? A Corona Ring is a circular conductive material, usually metal, which is attached to a terminal of high voltage equipment. The function of the Corona Ring is to distribute the electric field gradient and lower its maximum values below the...

## Losses in Electrical Machine – Core Loss and Eddy Current Loss

There are two types of Losses in an Electrical Machine. They are Core Loss or Iron Loss Ohmic Loss or Copper Loss In this post we will discuss about Core Loss. Core Loss is again classified into two types: Hysteresis Loss Eddy Current Loss First...

## What is Choke Coil?

If someone chokes a person, they can’t breathe, the flow of air is stopped. The name Choke comes from same idea. There is some energy that we want to Choke or prevent flowing in our circuit in or out of our circuit. We might want...

## Why Diesel Locomotive uses Electric Motor to Drive Wheels?

For Cars, Trucks, Buses, Trains, and even Ships, the main engineering requirement is that they all need a certain torque at a certain speed at a given instant of time. The Petrol or Diesel Engine is not able to provide that required torque at a...

## Doubly-fed Induction Generators – Wind Turbines

Doubly-fed Induction Generators in industry are used to generate electrical power in large wind turbines. This is primarily due to the many advantages of Doubly-fed Induction Generators than other types of generators in applications where the mechanical power provided by the prime mover driving the...

## Why is Load Angle of Alternator Kept 20°-30°?

As we know that Power Output of an Alternator, P = EfVtSinδ/Xs   Where Ef = No Load Voltage   Vt = Terminal Voltage of Alternator   δ = Load Angle   Xs = Synchronous Reactance Thus it is clear that power output of an...

## Parallel Resonance Circuit – A Rejecter Circuit

What is Parallel Resonance Circuit? Parallel resonant circuit is a generic term which consists of resistor, inductor as well as a capacitor in parallel connection. A parallel circuit containing a resistance, R, an inductance, L and a capacitance, C will produce a parallel resonance circuit...

## Speed Control of BLDC Motor

Speed control of BLDC motor is essential for making the motor work at desired rate. Speed of a brushless dc motor can be controlled by controlling the input dc voltage / current. The higher the voltage more is the speed. Many different control algorithms have...

## Brushless DC (BLDC) Motor

What is a Brushless DC or BLDC Motor? A Brushless DC Motor, BLDC accomplishes commutation electronically using rotor position feedback to determine when to switch the current. The BLDC motor is electrically commutated by power switches instead of brushes. The structure of Brushless DC Motor,...