As we know there are many types of motors available in the market. The function of each motor depends on its need. In normal life, one must use a human motor in some way that can increase the performance of the motor. Not every motor uses the same type of equipment but it depends on its type and requirement.
The optimization of the stator can be improved by the rotor as well as the optimization methods to improve the performance of the motor. In motors and in electrical machines such as generators, the stator plays an important role.
In today’s article, we will see what is a stator, what is its working principle, why is a stator constructed, etc.
Also Read: Best Pole Changing Method Of Speed Control Of Induction Motor
Table of Contents
What is Stator?
Definition: The stationary part in a motor is called a stator while the rotating part is called a rotor. There are many windings inside the stator. Its polarity is constantly changing when AC power is given to it. When this gets power an alternating current is provided in the winding to create an electromagnetic field towards the bar in the rotor.
So this will rotate the magnetic field due to AC power. It has thin and stacked laminations that are wound with the help of an insulated wire. This includes the number of stacked laminations in the core.
The diagram of the stator is as follows:
The motor can be designed up to a maximum of 22Kw while motors with high output have cast-iron housings. The main function of a motor is to handle the voltage, output, different frequencies, and unstable poles.
Also Read: What Is an Induction Motor | Types of Induction Motor | Advantage of Induction Motor
Construction of Stator:
This is designed with high-position alloy steel laminations to reduce the loss of the eddy current of the motor.
The motor consists of three main parts which are as follows:
#1. Outer frame
#2. Core
#3. Windings
#1. Outer frame
This part can be known from its name that it is the outer part of the motor. Its main function is to support the core of the motor and the inner part.
#2. Core
The core is made of silicon steel stampings. Its main function is to capture an unbalanced magnetic field to produce an eddy current and hysteresis damage. The core of the motor is attached to the frame in which the stator stamping is insulated with the help of varnish.
Varnishing changes the thickness of the stepping from 0.3 mm – 0.5 mm, attachments of slots can occur in stamping.
#3. Windings
3 phase winding is done in the main part of the stator through which this motor gets power. Three sets of these windings are used so that we get 6 ends on the outside. Inside the motor, this winding is set precisely depending on the speed of the motor.
If the number of poles in the motor increases then the speed of the motor decreases but if the number of poles decreases then the speed of the motor increases. The winding connection in the motor is made in delta or star.
The relationship between motor and speed can be given on the basis of the following formula.
Ns ∝ 1 / p otherwise Ns = 120f / p
Working Principle Of Stator:
When power is supplied to this motor a rotary magnetic field is generated in it. Its function varies depending on the machines such as motors, generators, and fluid-operated devices. The rotary generates a magnetic field to drive the rotor in the motor.
In a generator, it converts a rotary magnetic field into an electric current. Similarly, fluid-operated devices direct the flow of fluid in the direction of the moving part of the system.
Applications Of Stator:
The use of stator is as follows:
- Provides a rotating magnetic field to the rotor/armature rotating in the motor.
- The rotating electromotive acts as a field magnet in the motor based on the design.
- In a generator, it converts from a rotating magnetic field into an electric current.
- In fluid-operated equipment, it shows the path of fluid flow in the rotary part of the system.
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