D.C Generator Interview Questions
Q. Principle of operation of a generator? A. An electric generator is a machine that converts mechanical energy into electrical energy. An…
Load Sharing By Two Transformers
Let us consider the following two cases: Equal voltage ratios. Unequal voltage ratios. 1.39.1 Equal Voltage Ratios Assume no-load voltages EA and EB are identical and…
Three Phase Induction Motor
1.Introduction An electric motor is a device which converts an electrical energy into a mechanical energy. The motors operating on a.c. supply…
Torque Equation Of Three Phase Induction Motor
The torque produced in the induction motor depends on the following factors : 1. The part of rotating magnetic field which reacts…
Torque-Slip Characteristics In Three Phase Induction Motor
As the induction motor is located from no load to full load, its speed decreases hence slip increases. Due to the increased.…
Total Approximate Voltage Drop Of A Transformer
During no-load condition, induced voltages at the primary and secondary windings are equal to the applied voltage and secondary terminal voltage respectively.…
Transformer On Load
Figure 1.25(a) shows the transformer during no-load condition. The flux Φ is set up in the core. When the secondary is loaded shown in…
Transformer On No Load
For an ideal transformer, we have assumed that there are no core losses and copper losses. For practical transformers, these two losses…
Transformer With Resistance And Leakage Reactance
Figure 1.30 shows a transformer having resistances R1 and R2 of primary and secondary windings respectively, and leakage reactances X1 and X2 of primary and secondary windings respectively. The primary…
Transformer Windings
There are two types of windings usually used in a transformer. The winding receiving electrical energy is known as primary winding, whereas…