# Electrical Terms

## Equivalent Circuit of a Single Phase Induction Motor

The equivalent circuit of a Single Phase Induction Motor can be obtained by two methods named the Double Revolving Field Theory and Cross Field Theory. Firstly the equivalent circuit is developed on the basis of double revolving field theory when only its main winding is energized. Considering the case when the rotor is stationary and …

## Permanent Split Capacitor (PSC) Motor

The Permanent Split Capacitor motor also has a cage rotor and the two windings named as main and auxiliary windings similar to that of a Capacitor Start and Capacitor Start Capacitor Run Motor. It has only one capacitor connected in series with the starting winding. The capacitor C is permanently connected in the circuit both …

## Capacitor Start Capacitor Run Motor

The Capacitor Start Capacitor Run Motor has a cage rotor, and its stator has two windings known as Main and Auxiliary Windings. The two windings are displaced 90 degrees in space. There are two capacitors in this method one is used at the time of the starting and is known as starting capacitor. The other …

## Split Phase Induction Motor

The Split Phase Motor is also known as a Resistance Start Motor. It has a single cage rotor, and its stator has two windings known as main winding and starting winding. Both the windings are displaced 90 degrees in space. The main winding has very low resistance and a high inductive reactance whereas the starting …

## Capacitor Start Induction Motor

Capacitor Start Motors are single-phase Induction Motors that employ a capacitor in the auxiliary winding circuit to produce a greater phase difference between the current in the main and the auxiliary windings. The name capacitor starts itself shows that the motor uses a capacitor for the purpose of starting. The figure below shows the connection …

## Starting Methods of a Single Phase Induction Motor

The Single Phase Motor is not self-starting and hence needs an auxiliary means or equipment to start the single-phase induction motor. Mechanical methods are impractical and, therefore the motor is started temporarily converting into a two-phase motor. Single-phase Induction motors are usually classified according to the auxiliary means used to start the motor. They are …

## Working Principle of a Single Phase Induction Motor

A Single Phase Induction Motor consists of a single phase winding which is mounted on the stator of the motor and a cage winding placed on the rotor. A pulsating magnetic field is produced, when the stator winding of the single-phase induction motor shown below is energised by a single phase supply. The word Pulsating …

## Equivalent Circuit of an Induction Motor

The Equivalent Circuit of an Induction motor enables the performance characteristics which are evaluated for steady-state conditions. An induction motor is based on the principle of induction of voltages and currents. The voltage and current are induced in the rotor circuit from the stator circuit for the operation. The equivalent circuit of an induction motor …

## Isolated Induction Generator

An Isolated Induction Generator means that an induction machine can work as a generator even without an external supply system. A three-phase delta-connected capacitor bank is connected across the terminals of the machine as shown in the figure below. It provides a necessary excitation to the machine. The residual flux present in the machine provides …

## Applications of Induction Motor

The Polyphase Induction Motor is a motor whose stator contains a number of windings. They are greater than one horsepower or one kilowatt. The National Electrical Manufacturers Association (NEMA) has specified the motors according to the various classes, which are discussed below in detail. There are various applications of Polyphase wound rotor induction motors, Polyphase …