This test is similar to the no-load test performed on a transformer. The purpose of this test is to determine the no-load losses , no-load power factor, and constants R o and X o of the equivalent circuit. The no-load losses i…
The various types of starters used for starting a 3-phase induction motor are, Full Voltage Starting, Direct-on-line (DOL) starter (full voltage starting). Reduced Voltage Starting, Autotransformer starter. Star-delta starter (re…
The torque T, of an induction motor, is proportional to the product of stator flux per pole (Φ), rotor current (I), and the power factor of the rotor. The torque of an induction motor is due to the interaction of the rotor and st…
Construction of Variable Reluctance Stepper Motor : It is the most basic type of stepper motor . The stator of this motor consists of a three-phase wounded type. It has six salient poles with concentrated windings around each on…
A stepper motor is an electro-mechanical device that actuates a train of step movements of a shaft in response to a train of input pulses. The step movement may be angular or linear. The step movement of the motor is according to…
Principle of Operation of AC Series Motor : An ordinary dc series motor will run in the same direction regardless of the polarity of the supply. The direction of the torque depends upon the relative directions in space of flux a…
It is interesting to know how a single-phase induction motor can able to rotate when an initial rotation or starting torque is given to it. This can understand with the help of cross-field theory and double-revolving field theory…
