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 over or under currents, ove…
Generally, the starting torque of induction motors is reasonably not much high. In case of a slip-ring induction motor, the starting torque can be increased by adding external resistance in the rotor circuit. But, we cannot…
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 rati…
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…
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 c…
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 ),…
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…
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., on electrom…
