Overview of Squirrel Cage Induction Motor
The squirrel cage induction motor is one of the most commonly used types of electric motors. It is a three-phase induction motor that has a rotor with conductive bars, which look like a squirrel cage, hence the name. The stator produces a rotating magnetic field that induces current in the rotor bars, which in turn produces a torque to rotate the motor. The squirrel cage induction motor is rugged, reliable, and has a low maintenance cost, making it ideal for industrial applications.
How Squirrel Cage Induction Motor Works
The squirrel cage induction motor works on the principle of electromagnetic induction. The stator has a set of windings that are fed with a three-phase AC supply. The current in the windings produces a rotating magnetic field, which induces a current in the rotor bars. The rotor bars are short-circuited at both ends, which creates a closed loop circuit. This, in turn, produces a magnetic field that interacts with the stator’s magnetic field and produces a torque that rotates the motor.
Applications of Squirrel Cage Induction Motor
The squirrel cage induction motor finds applications in various industries, such as pumps, compressors, conveyors, and fans. It is also used in household appliances like washing machines, air conditioners, and refrigerators. The squirrel cage induction motor is preferred over other types of motors due to its low cost, high reliability, and ease of maintenance. It is also suitable for harsh environments, where other types of motors may fail.
Example of Squirrel Cage Induction Motor in Use
One example of a squirrel cage induction motor in use is in a centrifugal pump for a water treatment plant. The motor is connected to the pump through a coupling, which allows the motor to transfer its rotational energy to the pump. The motor is controlled by a variable frequency drive, which regulates the speed of the motor based on the flow demand of the water treatment process. The squirrel cage induction motor is ideal for this application due to its high efficiency, low maintenance, and ability to handle variable loads.
