🔍
Request Answer
Explain the construction, working principle of single phase Induction motor.
0 like 0 dislike

Please log in or register to answer this question.

1 Answer

Single phase motors are very widely used in home, offices, workshops etc. as power delivered to most of the houses and offices is single phase. In addition to this, single phase motors are reliable, cheap in cost, simple in construction and easy to repair.


Single phase electric motors can be classified as:

1. Single phase induction motor (Split phase, Capacitor and shaded pole etc)

2. Single phase synchronous motor

3. Repulsion motor etc.


Single Phase Induction Motor


CONSTRUCTION:

Construction of a single phase induction motor is similar to the construction of three phase induction motor having squirrel cage rotor, except that the stator is wound for single phase supply. Stator is also provided with a 'starting winding' which is used only for starting purpose. This can be understood from the schematic of single phase induction motor at the left.

image
Working Principle Of Single Phase Induction Motor: 
 When the stator of a single phase motor is fed with single phase supply, it produces alternating flux in the stator winding. The alternating current flowing through stator winding causes induced current in the rotor bars (of the squirrel cage rotor ) according to Faraday's law of electromagnetic induction. 
 This induced current in the rotor will also produce alternating flux. Even after both alternating fluxes are set up, the motor fails to start . However, if the rotor is given a initial start by external force in either direction, then motor accelerates to its final speed and keeps running with its rated speed. This behavior of a single phase motor can be explained by double-field revolving theory.
0 like 0 dislike
Next Question ⇨⇦ Previous Question

Related questions

Explain the working principle of various types of single phase induction motor with neat circuit diagram.
Last Answer : The single phase induction motors are made self- starting by providing an additional flux by some additional means. Now depending upon these additional means the single phase induction motors are classified as ... maximum value. 3. When the flux decreases from maximum positive value to zero. ...

Show More
0 like 0 dislike
1 answer

Random Images

With a neat circuit diagram Explain the construction and principle of operation of DC Motor.
Last Answer : DC MOTOR - INTRODUCTION:  A machine that converts dc power into mechanical energy is known as dc motor. Its operation is based on the principle that when a current carrying conductor is placed in a ... , an upward force will move one wire up and a downward force will move the other wire down. ...

Show More
0 like 0 dislike
1 answer

Random Images

Describe the construction details of single phase transformer.
Last Answer : TRANSFORMER - INTRODUCTION   A TRANSFORMER is a device that transfers electrical energy from one circuit to another by electromagnetic induction (transformer action). The electrical energy is ... secondary winding. The primary is wound in layers directly on a rectangular cardboard form. ...

Show More
0 like 0 dislike
1 answer

Random Images

Explain the construction and principle of operating single phase energy meter.
Last Answer : Construction of AC Energy Meter:  Energy meters are the basic part to measure the power consumption. It is used everywhere, no matter how big or small consumption it is. It is also known ...  Electromechanical type induction meter  Electronic energy meter  Smart energy meters ...

Show More
0 like 0 dislike
1 answer

Random Images

With a neat circuit diagram Explain the construction and principle of operation of DC Generator
Last Answer : DC Generator: A dc generator is an electrical machine which converts mechanical energy into direct current electricity. This energy conversion is based on the principle of production of dynamically ... current reversal occurs. And therefore, we get unidirectional current at the terminals. ...

Show More
0 like 0 dislike
1 answer

Random Images
...