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…

For an ideal transformer, we have assumed that there are no core losses and copper losses. For practical transformers, these two losses…

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…

There are two types of windings usually used in a transformer. The winding receiving electrical energy is known as primary winding, whereas…

With constant voltage applied in primary, the secondary terminal voltage will decrease due to voltage drop across its internal resistance and leakage…

A transformer may be step up or step down. If the output voltage is greater than the input voltage, the transformer is…

Consider the rotating magnetic field as equivalent to physical rotation of two stator poles N1 and S1. Consider an instant when two poles…

  Eduction motor works on the principle of electromagnetic induction. When a three phase supply is given to the three phase stator…

Armature windings are classified into two different types namely i) Closed type winding ii) Open type winding. 1.1 Closed Type Winding In…

Consider the field magnetization characteristics of a d.c. shunt generator shown in the Fig. 1. Fig. 1 Concept of critical resistance The…