Induction motor

A polyphase induction motor, also known as an asynchronous motor, is a type of electric motor that operates on the principle of electromagnetic induction to convert electrical energy into mechanical energy. It is called _________________ because it has multiple phases in its stator winding.

motors have normal starting torque, high starting current and low operating slip (from 0.005 to 0.015). This motor design has a low-resistance single-cage rotor. The full-load efficiency of this motor is high.

normal starting torque, low starting current and low operating slip. By increasing the leakage reactance, the starting current can be reduced and the starting torque is maintained by using double-cage or deep bar rotor. These motors are most popular and used for full-voltage starting.

have high starting torques and low-starting current. These motors have a high-resistance double-cage or deep-bar rotor construction. The applications of this motors are for practically constant-speed loads that require fairly high torque with low starting current.

have the highest starting torque of all squirrel cage induction motors. The rotor conductor bars of these motors are made up of high resistance material like brass instead of copper or aluminium. This squirrel cage motors have low starting current and high operating slip (from 0.08 to 0.15), therefore, the running efficiency is low.

The difference between the synchronous speed Ns and the actual rotor speed Nr.. It is usually expressed as a percentage of the synchronous speed.

twisting force that tends to cause rotation.