The three-phase induction motor is one of the most popular and most widely used electric motors. They are used in many applications due to their simple and rugged construction with almost maintenance-free operation. It is an asy…
The working principle of an induction motor is similar to a transformer i.e., the primary and secondary windings of a transformer are referred to as stator and rotor in the case of an induction motor. The transformer works on the…
During the operation of single-phase ac motors, it experiences various faults at the time of starting or stopping or while running. The faults in single-phase motors are due to many reasons like overcurrents or undercurrents, ove…
Generally, the starting torque of induction motors is reasonably not high. In the case of a slip-ring induction motor, the starting torque can be increased by adding external resistance in the rotor circuit. But, we cannot obtain…
Sometimes the induction motor shows undesirable characteristics known as 'Crawling and Cogging'. These characteristics will affect the motor operation i.e., it reduces the speed of the motor from its full speed rating or …
The induction motor and transformer both are singly energized devices. The stator and rotor of an induction motor can be compared to the primary and secondary windings of the transformer. Similarly, from the e.m.f. equation of tr…
In the last article, we have seen the torque equation of induction motor i.e., the amount of torque produced on the rotor depends upon rotor current, rotor resistance, rotor reactance, and slip. From the torque-slip characteris…
Why induction motor can not run at synchronous speed? When the supply is given to the induction motor the field winding set-ups a magnetic field rotating at synchronous speed N s (i.e., N s = 120f/number of poles), and the fie…
We know that the induction motor is an asynchronous motor (i.e., not a constant speed motor). Its speed changes with a change in the load connected to it. As the load on the motor increases the slip of the motor increases. This m…
An induction motor is an asynchronous motor i.e., its speed change with a change in load. It always runs on a lagging power factor. The principle of working of an induction motor to similar to the transformer i.e., electromagneti…
