## What is Blocked Rotor Test of Induction Motor ?

Blocked rotor test, it is quite opposite to the no-load test of the induction motor. Usually in transformer tests, if we want to find the behavior of a transformer on loading and on no-load, it can be done by using open ci…

## What is Ideal Transformer ? - Phasor Diagram & Model

What is Ideal Transformer ?      An ideal transformer is one that has no losses i.e., its windings have no resistance, there is no magnetic leakage, and hence which has no iron and copper losses. It may, however, be noted t…

## What is a Transformer ? - Definition & Working Principle of Transformer

As we know that most electrical power plants are located far away from the load centers. Because the electrical energy generated by thermal and hydro or any other power plants are located at a distance from the consumers.…

## Necessity and Methods of Starting an Three Phase Induction Motor

Necessity of Starting a Three-phase Induction Motor :      In a 3-phase Induction motor, the magnitude of rotor induced emf depends upon slip. Rotor current,      At starting, the magnitude of rotor induced emf and sli…

## Shaded Pole Induction Motor - Construction, Working Principle & Applications

As we know that a single-phase induction motor is not a self-starting motor. In order to make it self starting, changes are to be done to the construction. Let us see the construction and working principle of the shaded …

## Speed Control of DC Series Motor - Flux & Rheostatic Control

In a dc motor, speed will depend on armature current and field voltage. So to control dc motor  speed, field voltage or armature current should be changed.      In a dc series motor or universal motor, the speed is indete…

## Power Flow Diagram & Power Developed by Synchronous Motor

The phasor diagram of a synchronous motor is shown below. From the phasor diagram, Let     V = Supply voltage / phase      I a   = Armature current / phase      R a   = Armature resistance / phase      α  = Load angl…