What is an ac motor Induction Motor?
An induction motor or asynchronous motor is an AC electric engine in which the electric current in the rotor had a need to create torque is obtained by electromagnetic induction from the magnetic field of the stator winding.
Working Basic principle of Induction Motor
We have to give dual excitation to produce a DC motor 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 engine, we give only 1 supply, so that it is interesting to learn how an induction engine works. It is basic, from the name itself we are able to 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 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, according to Faraday’s regulation of electromagnetic induction, the current will start flowing through the coil of the rotor. When the current through the rotor coils flows, another flux gets generated in the rotor. Now there are two fluxes, one is usually stator flux, and another is certainly 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 the direction of the rotating magnetic field. This is actually 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 single 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 already mentioned above that the single-phase induction motor is not a self-starting motor, and that the three-phase induction motor is self-starting. Just what exactly is a self-starting engine?
When the engine starts running automatically without any external force put on the machine, then your motor is referred to as ‘self-starting’. For instance, we see that whenever we put on the switch the fan starts to rotate automatically, so it is definitely a self-starting machine. Point to be noted that fan used in home appliances is a single phase induction motor which is certainly inherently not self-starting. How? Will a question arise concerning how it works? We will discuss it now.