## EMF Equation of a Synchronous Generator

The generator which runs at a synchronous speed is known as the synchronous generator. The synchronous generator converts the mechanical power into electrical energy for the grid. The Derivation of EMF Equation of a synchronous generator is given below. Let, P be the number of poles ϕ is Flux per pole in Webers N is …

## Distribution Factor

The Distribution Factor or the Breadth Factor is defined as the ratio of the actual voltage obtained to the possible voltage if all the coils of a polar group were concentrated in a single slot. It is denoted by Kd and is given by the equation shown below. In a concentrated winding, each phase of …

## Coil Span Factor

The Coil Span Factor or Pitch Factor KC is defined as the ratio of the voltage generated in the short pitch coil to the voltage generated in the full pitch coil. The distance between the two sides of a coil is called the Coil Span or Coil Pitch Factor. It is also known as Chording Factor. …

## Synchronous Machine

Synchronous Machine constitutes of both synchronous motors as well as synchronous generators. An AC system has some advantages over a DC system. Therefore, the AC system is exclusively used for the generation, transmission, and distribution of electric power. The machine which converts mechanical power into AC electrical power is called a Synchronous Generator or Alternator. …

## 4 Point Starter

A 4 Point Starter is almost similar in functional characteristics to 3 Point Starter. In the absence of back EMF, the 4 Point Starter acts as a current limiting device while the starting of the DC motor. 4 Point Starter also acts as a protecting device. The basic difference in 4 Point Starter as compared …

## 3 Point Starter

3 Point Starter is a device whose main function is starting and maintaining the speed of the DC shunt motor. The 3 point starter connects the resistance in series with the circuit which reduces the high starting current and hence protects the machines from damage. Mainly there are three main points or terminals in 3 …

## Armature Reaction in a DC Generator

Definition: The armature reaction simply shows the effect of armature field on the main field. In other words, the armature reaction represents the impact of the armature flux on the main field flux. The armature field is produced by the armature conductors when current flows through them. And the main field is produced by the …

## Reverse Bias p n Junction

When the positive terminal of a DC source or battery is connected to n-type, and the negative terminal is connected to the p-type semiconductor of a p n junction, the junction is said to be in Reverse Biasing condition. The diagram of reverse bias p n junction is shown below. In this case, the applied …

## Forward Bias p n Junction

A p n junction is said to be operating under the biasing condition if it is connected across an electric supply. The potential difference across the p n junction can be applied in two ways, namely Forward Biasing and Reverse Biasing. When the positive terminal of a DC source or battery is connected to p-type, …

## Full Wave Bridge Rectifier

In Full Wave Bridge Rectifier, an ordinary transformer is used in place of a center-tapped transformer. The circuit forms a bridge connecting the four diodes D1, D2, D3, and D4. The circuit diagram of the Full Wave Bridge Rectifier is shown below. Contents: Operation of Full Wave Bridge Rectifier Peak Inverse Voltage of Full Wave …