What is an induction motor? Induction motors from the name, are AC motors where they rely on induction that occurs due to the magnetic field to produce torque in order to generate motion. Therefore there is no force intervention in starting or during the operation of the induction motor, since the main purpose of the induction motor is to convert electrical energy into mechanical energy, to drive other machines or appliances. Three-phase induction motors are easily built and handled. The induction motor was first introduced in the late 19th century by a scientist called Nikola Tesla, in the beginning the induction motor had the same working principle and construction as today, the difference is that the technology introduced new materials to fabricate wires and the shafts and housing of the motor, greatly improve its performance and efficiency. Applications of Induction Motors: Induction motor occupies a large part of the industry, as they are introduced into everyday applications, such as toys, water pumps, fans, washing machines, and automobiles. The reason why three-phase induction motors are very popular is due to the simplicity of the mechanisms included, low-cost availability, low risk of failure, cost-effectiveness and the ability to produce high torque. Another reason why three-phase induction motor is widely used is that it can be easily handled and easily manufactured to suit all types of applications, three-phase induction motors can be manipulated to produce high or low torque and high or low speed . Induction Motor Size and Power: This type of induction motors, with the power of technology and science, has reached a point where there are very small motors ranging from 0.1 HP to huge 3000 HP motors,.. ....half of the paper. .....expensive and has torque loss problems. Three-phase induction motor speed control: The speed of the motor depends on the number of poles, frequency and slip. The velocity equation is as follows: N = 120f/p (1-S). Where f is the power frequency, p is the number of poles, s is the slip. So the speed control method is reliable based on these factors and the methods can be one of the introduced methods: 1- Pole Changing • In short, pole changing can be changed using multiple stator windings, consequent pole method and pole width manipulation.2- Power frequency control3- Rotor resistance control• This method is only done in wound rotor motors, by adding resistance to the rotor circuit in the rotor bars, this will greatly affect the torque-speed curves. This method is effective and not expensive.4- Stator voltage control5- Slip recovery