3 Phase induction motor diagram

The absence of slip ring and brushes make the construction of Squirrel cage three phase induction motor very simple and robust and hence widely used three phase induction motor. These motors have the advantage of adapting any number of pole pairs. The below diagram shows squirrel cage induction rotor having . For better understanding the principle of three phase induction motor , the basic constructional feature of this motor must be known to us.

Depending upon the type of rotor used the three phase induction motor are classified as-.

The construction of stator for both the kind of three phase induction motor remains the same and is discussed in brief .

For industrial and mining applications, - phase AC induction motors are the prime movers for the vast majority of machines.

It is assumed that readers are already familiar with the . Contactors: The Star- Delta starter circuit comprises of three contactors: Main, star and delta contactors. Construction of Stator and Rotor of the Induction Motor is explained in this article. A three phase Induction motor mainly consists of two parts.

Firstly the magnitude of rotor current, secondly the flux which interact with the rotor of three phase induction motor and is responsible for producing emf in the rotor.

The power factor of the rotor circuit is Putting the value of flux φ, rotor current I power factor cosθin the equation of torque we get, Combining similar term we . In addition to the main winding or running winding, the stator of single phase induction motor carries another winding called auxiliary winding or starting winding. A centrifugal switch is connected in series with auxiliary winding. The purpose of this switch is to disconnect the auxiliary winding from the main circuit when the . If the condition changes, we need to draw the phasor diagram again. On the context of induction motor , which is . These are some of the protection systems for three - phase induction motors against starting inrush currents, overheating and single phasing faults with the . Figure below) However, it will not self-start.

In case of three phase AC operation, most usually used motor is Three phase induction motor as this type of motor does not need any starting device or we can say they are . We had mentioned above that single phase . Two- wattmeter method to measure - phase active power.

Electrical Engg, College of Engineering Trivandrum. Circle Diagram for Three Phase Induction Motors. Run the induction motor on no- load at rated supply voltage. Observe the supply line voltage V.