Separately Excited DC Generator
These are generators with field magnets powered by an external DC source, such as a battery.
The circuit diagram for a separate DC generator is given in the figure below.
- Ia = armature current.
- IL = Load Current
- V = terminal voltage.
- Eg = generated EMF (Electromagnetic Force).
Let
Ia = IL=I
The voltage across the load ,
V = I. Ra
The power created is equal to
Pg = Eg x I
The power provided to an external load is calculated using the equation
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