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Tutorials

Generation Of Induced Emf And Current

Figure 9 shows an insulated coil whose terminals are connected to a sensitive galvanometer (G). There is a bar magnet, AB, close to…

Three Phase Induction Motor

Power Flow In Synchronous Motor

Net input to the synchronous motor is the three phase input to the stator. ...                      Pin = ?3 VL IL cos? W where        …

Tutorials

Cross Field Theory

Consider a single phase induction motor with standstill rotor as shown in the Fig. 1. The stator winding is excited by the…

Transformer

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…

Machine

Compound Generator

In this type, the part of the field winding is connected in parallel with armature and part in series with the armature.…

Electrical Machine

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…

PN Junction Diode

Current Density In A Conducting Medium

Currents in metals are due to the movement of charge carriers ‘electrons’. where I is the current in Amperes and A is the cross-sectional area of…

Machine

Armature Winding In D.C. Machines

The armature winding used in d.c. machines are closed and double layer. Each of the coil has its upper coil side placed…

Electrical Machine

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…

Single Phase Induction Motor

Capacitor Start Induction Motors

The construction of this type of motors is similar to the resistance split phase type. The difference is that in series with…