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11 Difference between Stator and Rotor of an Electrical Machine

In an electrical machine (especiallya motor and a generator), the stator and rotor are the essential components. These two components help to build the electromagnetic force due to the interaction between them.

The generated electromagnetic force activates the rotating system in terms of electrical or mechanical energy.

Both components of the machine are inbuilt in the same machine. But, they have different functions and other specifications.

In this article, we are going to study what is the difference between stator and rotor of an electrical machine.

Stator Vs. Rotor [In Tubular Form]

# Content Stator Rotor
01 What is stator and rotor? The stator is a stationary (or fixed) part of an electrical motor. The rotor is a rotating (or moving) part of an electrical motor.
02 How are name of stator & rotor derived? From the stationary part of the motor, the stator’s name is obtained. From the rotating part of the motor, the rotor’s name is obtained.
03 Construction The stator is situated outside the rotor. The rotor is situated inside the core of the stator.
04 Inbuilt parts of stator and rotor in motor It consists of three main parts such as core, winding, and outer frame. It consists of two main parts such as core and field winding.
05 Power Source Basically, the stator’s winding requires an AC (three-phase) supply. The rotor requires a DC supply to generate a rotating field.
06 Winding
In the stator, the winding arrangement is more difficult as compared to the rotor. In the rotor, the winding arrangement is simple as compared to the stator.
07 Winding
The stator has large size winding. Rotor winding finds in a small size.
08 Weight The stator (or core) winding has more weight as compared to the rotor. The rotor winding occurs in lightweight as compared to the stator.
09 Insulation High insulation is provided in the stator winding to carry heavy current. Low insulation is provided in the rotor winding.
10 Friction Losses More friction losses occur in the stator. Fewer friction losses occur in the rotor.
11 Cooling
The cooling system of stator is easy. The cooling system of the rotor is difficult.

These are the main difference between stator and rotor. Hope each point is clear.

If you have any doubt or any point to include, feel free to discuss in the comment section.

Other related differences you would like to read:

Thanks for Reading!

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Stator And Rotor Core