What is an Induction Motor?
An induction engine or asynchronous motor can be an AC electric engine in which the electric current in the rotor needed to generate torque is obtained by electromagnetic induction from the magnetic field of the stator winding.
Working Theory of Induction Motor
We have to give dual excitation to produce a DC engine to rotate. In the DC electric 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 one supply, so it is interesting to learn how an induction electric motor works. It is basic, from the name itself we can understand that right here, the induction process is involved. When we give the supply to the stator winding, a magnetic flux gets stated in the stator because of the flow of current in the coil. The rotor winding is so 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, in accordance to Faraday’s legislation of electromagnetic induction, the existing will start moving through the coil of the rotor. When the existing through the rotor coils flows, another flux gets generated in the rotor. There are two fluxes, one can be stator flux, and another is rotor flux. The rotor flux will become 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 actually the working principle of both solitary and three phase induction motors.
Types of Induction Motors
The types of induction motors can be classified depending on if they are a solitary phase or three phase induction electric motor.
Single Phase 
Induction Motor
The types of one phase induction motors include:
Split Phase Induction Motor
Capacitor Start Induction Motor
Capacitor Begin and Capacitor Operate 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 ac motor already mentioned over that the single-stage induction motor is not a self-starting engine, and that the three-phase induction electric motor is self-starting. So what is a self-starting engine?
When the electric motor starts running automatically without any external force put on the machine, then the motor is known as ‘self-starting’. For instance, we see that whenever we placed on the change the enthusiast starts to rotate immediately, so it is usually a self-starting machine. Indicate be noted that fan used in home appliances is a single phase induction engine which can be inherently not really self-starting. How? Does a question arise as to how it works? We will discuss it at this point.