What is an 3 phase induction motor?

What is an 3 phase induction motor?

Three-phase motors are a type of AC motor that is a specific example of a polyphase motor. These motors can be either an induction motor (also called an asynchronous motor) or a synchronous motor. The motors consist of three main components – the stator, the rotor, and the enclosure.

What are types of 3phase induction motor?

There are three types of 3- phase induction motors namely plain or squirrel cage induction motor, slip-ring or wound rotor induction motor and double cage rotor induction motor.

What is a three-phase motor?

A three-phase motor is an electric machine that transforms electric power into mechanical energy by means of electromagnetic interactions.

Are all 3 phase motors induction motors?

Out of all types, 3 phase induction motors are most widely used for industrial applications mainly because they do not require a starting device. A 3 phase induction motor derives its name from the fact that the rotor current is induced by the magnetic field, instead of electrical connections.

What are the disadvantages of a three phase induction motor?

The disadvantages of 3 phase induction motor are: The induction motors have a poor starting torque. As a result, they draw inrush currents causing momentary voltage drop. So the motor is not suitable for high power applications like traction systems etc.

How does a 3-phase induction motor start?

A three phase Induction Motor is Self Starting . When the supply is connected to the stator of a three-phase induction motor, a rotating magnetic field is produced, and the rotor starts rotating and the induction motor starts. At the time of starting, the motor slip is unity, and the starting current is very large.

What is the principle of 3 phase induction motor?

The working principle of Three phase Induction Motor is basically based on the principle of mutual induction as in case of transformer. The major difference between them is that transformer is static in nature i.e. it doesn’t have any moving parts whereas Induction Motor is a dynamic one.

How does 3 phase induction motors work?

How does an 3-phase induction motor work? In short, it works based on the principle of electromagnetic induction . When the stator windings are supplied with three-phase alternating current, a rotating magnetic field is generated between the stator and the rotor.