Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between Stator & Rotor. There are two main types of electrical machines first one is AC machines such as ac generators and ac motors. These are further divided into other types such as induction motor, single-phase induction motor, three-phase induction motor, synchronous motor, and introduction to synchronous generator, induction generator. The second type is the dc motor and generator. All these machines either ac or dc have main two parts which are the stator and rotor. The basic difference between them is that the stator is a static part and the rotor is a rotatory part of these machines.
The subparts of a stator are the core of the stator, the frame of the stator, and the windings of the stator. The stator frame provides support to the core and protects the winding wounded from the external environment. In the core of the stator rotating magnetic field flows that is generated due to input 3 phase supply. The rotor of the machine is placed in the core of the stator. There are commonly used types of rotor squirrel cage and wound rotor. The supply given at the stator induces a magnetic field in the stator which like with the core of the rotor generates emf in the rotor. In today’s post, we will have a detailed look at both the rotor and stator and find their differences. So let’s get started with the Difference Between a Stator & Rotor.
Difference Between Stator & Rotor
Stator
- The static part of electric machines is called the stator in this part field winding is wound and the input supply is given in the case of the motor.
- There are 3 main parts of the stator which are the outer frame, stator core, and stator winding.
- At the stator, larger insulation is needed than the rotor.
- The amount of frictional losses at the stator is large.
- The cooling process of the stator is easy.
- Energy transmits from the stator and comes to the stator to the rotating part of the machine which is the rotor.
- In the case of motors rotating magnetic field is produced at the stator that is given to the rotor windings and emf induced at motor work.
- While in the generator stator is used to conversion the field to the current
- At the stator, AC supply is given.
- The winding wound on the stator is more complicated than the rotor windings.
- Stator covers the inner part of machines and also saves from damage
- The stator can be permanent magnets or electromagnet
- In an electromagnetic field coils are used to make an electromagnet
Rotor
- The rotatory portion of an electric machine is called the rotor.
- There are 2 main parts of the rotor first the winding of the rotor and the second one is the core of the rotor.
- The DC supply is given at the stator.
- There are different types of rotor like squirrel cages rotor, wound rotor salient pole rotor
- The configuration of windings at the rotor is easier than the stator.
- At the rotor, less insulation is needed.
- The cooling process of the rotor is difficult as compared to the stator.
- In the case of 3-phase induction, motor AC is given to the stator, and flux is induced in the rotor.
- Due to flux field is generated and current passing the rotor.
- The squirrel cage rotor speed is less than the speed of the field at the stator.
- wound rotor has a constant value off speed and operates at less current
Functions of Stator in Electrical Machines
- The stator is a system of the magnetic field that generates the main flux needed for operating the motor
- In generator stator work as armature. it has armature windings where emf and current induce that then provide electrical loads.
- It also over the inner structure of machines
Functions of Rotor in Electrical Machines
- In motors, rotors transform electrical energy into mechanical energy for operating different connected loads on the motor. In simple words, rotors are like armature and produce torque.
- While in the generator rotor produces a field used for inducing emf in armature windings.
- Whether the machine is a motor or generator, the rotor is a moveable component of a machine.
Stator Vs. Rotor
Stator
- It is the static part of machines.
- Since it is stationary so known as a stator.
- The stator lies on the external part of the rotor.
- It has 3 main parts core, windings, and external frame
- Windnigs of stator needed 3 phase AC supply.
- Its winding process is more difficult than the rotor.
- It needed longer windings
- There are high frictional losses for this part of the machine
Rotor
- It is a moving component of a motor.
- The rotors lie inside the stator
- Its two main parts are the core and winding involved on the rotor called field windings
- It has simple windings then a stator
- Rotors needed less wire for winding than the stator
- Due to its small size, its windings are low-weight
- It needed low insulation and also has low friction losses
Faqs
What is the function of the stator in the rotor?
- Stators get or provide energy from or to rotating parts of machines or rotors. In motors, stators provide a field that operates the rotor armature, and in generators, stators convert the field to electric current.
What is the difference in speed between the stator and rotor?
- If you are using a synchronous motor then the rotor and rotating field of the stator have the same speed and that is called synchronous speed.
- For induction motor rotor moves speed less than the field rotation of the stator and their difference is called slip speed.
How does a stator work?
- The stator works as a reference for electric motors and it is a component that helps to rotate the rotor. Normally stator has a laminated steel sheet and helps magentic flux to move.
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That is all about the difference between the rotor and stator, if you have any queries, ask in the comments. I tried my level best to make simple this post for you. I hope you enjoyed this tutorial. Have a good day. see you in the next post.