Electrical Machine Interview Question And Answer
[1] Define the term synchronous speed [Dec-2003] For synchronous machines there exists a fixed relationship between number of poles P, frequency (f)…
Effect Of Slip On Rotor Parameters : Part 3
Effect of Slip on Rotor Parameters 4. Effect on Rotor Power factor From rotor impedance, we can write the expression for the…
Relation Between P2, Pc, And Pm
The rotor input P2, rotor copper loss Pc and gross mechanical power developed Pm are related through the slip s. Let us derive this…
Salient Pole Synchronous Motor
The analysis of salient pole synchronous motor is based on the Blondel’s two reaction. The direct and quadrature axis components of current…
Introduction And Working Of Synchronous Motor
1. Introduction If a three phase supply is given to the stator of a three phase alternator, it can work as a…
Transformer Interview Questions Part 1
Q. What is a Transformer? A. A transformer is a static electrical apparatus designed to convert alternating current from one voltage to…
Hunting In Synchronous Motor
It is seen that, when synchronous motor is on no load, the stator and rotor pole axes almost coincide with each other.…
Concepts Of Slip Rings And Brush Assembly In Three Phase Induction Motor
Whenever there is a need of connecting the rotating member of the machine to the stationary external circuit, then slip rings and…
Analysis Of Phasor Diagram Of Synchronous Motor
Consider a phasor diagram with normal excitation i.e. such a current through field winding which will produce flux that will adjust magnitude…
Transformer Interview Question Part 4
Q. What are the advantages of parallel operation of transformers? A. 1) To maximize electrical power system efficiency: Generally electrical power transformer…