What’s an Induction Motor?
An induction electric motor or asynchronous motor is an AC electric motor in which the electric energy in the rotor had a need to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding.
Working Basic principle of Induction Motor
We need to give dual excitation to make a DC engine to rotate. In the DC motor, we provide one supply to the stator and another to the rotor through brush set up. However in induction electric motor, we give only 1 supply, so it is interesting to learn how an induction electric motor works. It is simple, from the name itself we can understand that here, the induction procedure is involved. Whenever we give the supply to the stator winding, a magnetic flux gets produced in the stator due to the movement of current in the coil. The rotor winding is indeed arranged that each coil becomes short-circuited.
The flux from the stator cuts the short-circuited coil in the rotor. As the rotor coils are short-circuited, according to Faraday’s regulation of electromagnetic induction, the existing will start flowing through the coil of the rotor. When the current through the rotor coils flows, another flux gets generated in the rotor. There are two fluxes, one can be stator flux, and another can be rotor flux. The rotor flux will end up being lagging according of the stator flux. Due to that, the rotor will feel a torque which can make the rotor to rotate in direction of the rotating magnetic field. This is the working theory of both solitary and three stage induction motors.
Types of Induction Motors
The types of induction motors could be classified depending on if they are a solitary phase or three phase induction motor.
Single Phase Induction Motor
The types of one phase induction motors include:
Split Phase Induction Motor
Capacitor Start Induction Motor
Capacitor Start and Capacitor Run Induction Motor
Shaded Pole Induction Motor
Three Phase Induction Motor
The types of three phase induction motors include:
Squirrel Cage Induction Motor
Slip Ring Induction Motor
We have mentioned previously over that the single-phase induction motor isn’t a ac motor self-starting electric motor, and that the three-phase induction electric motor is self-starting. So what is a self-starting electric motor?
When the electric motor starts running automatically with no external force put on the machine, then the motor is referred to as ‘self-starting’. For instance, we see that when we put on the switch the lover starts to rotate immediately, so it is a self-starting machine. Indicate be noted that enthusiast used in home devices is a single phase induction electric motor which is definitely inherently not self-starting. How? Does a question arise as to how it works? We will discuss it today.