Series Generators
In these generators, the field windings are linked in series with the armature conductors, as seen in the diagram below.
The whole current goes through both the field coils and the load. As a series field winding carries full load current, it is constructed with a few rounds of thick wire. As a result, the series field winding has an extremely low electrical resistance of almost 0.5.
Here:
- Rsc represents series winding resistance.
- Isc = series field current.
- Ra = Armature resistance.
- Ia = armature current.
- IL = Load Current
- V = terminal voltage.
- Eg = generated EMF.
The equation becomes
Ia = Isc = IL = I
Voltage across the load equals
V = Eg – I (Ia x Ra)
The power generated is equivalent to:
Pg = Eg x I.
The power given to the load is equal to:
PL = V x I
Construction And Working of a DC Generator
In 1831, Michael Faraday, a British physicist, devised the electromagnetic generator. The primary function of this device is to convert mechanical energy to electrical energy. There are several types of mechanical energy sources available, including hand cranks, internal combustion engines, water turbines, and gas and steam turbines. The generator provides capacity for all electrical power networks. An electric motor should be able to perform the generator’s converse function. The basic purpose of the motor is to convert electrical energy into mechanical energy. Generators and motors have many properties.
Table of Content
- DC Generator
- Construction of a DC generator
- Workings
- Types
- Losses in DC Machines
- Characteristics of DC Generator
- Characteristics of DC Series Generator
- Characteristics of DC Shunt Generators
- External Load Characteristics of the DC Compound Generator
- Efficiency of a DC Generator