The two circuits are said to be coupled circuits if all or part of the electrical energy supplied to one…
The important characteristics of the synchronous motor is its constant speed irrespective of the load conditions, and variable power factor…
Q. What is the significance of vector grouping in Power Transformers? A. Every power transformer has a vector group listed…
We have seen previously that when load changes, for constant excitation, current drawn by the motor increases. But if excitation…
Q. Why the transformer ratings are in kva? A. Since the power factor of transformer is dependent on load we…
Q1: Where do we require single-phase induction motors? Ans: Single-phase induction motors are required where (i) 3 phase supply is…
It is shown that in slip ring induction motor, externally resistance can be added in the rotor. Let us see…
As seen earlier, synchronous motor is not self starting. It is necessary to rotate the rotor at a speed very…
The various power losses in an induction motor can be classified as, i) Constant losses ii) Variable losses i) Constant…
Two types of losses occur in a transformer: Core loss or iron loss occurs in a transformer because it is…