Long Shunt Compound DC Generator
Long Shunt Compound DC Generators are those in which the shunt field winding is parallel to both the series field and the armature winding, as seen in the picture below.
The shunt field current is equal to
Ish = V/Rsh.
Armature current, Ia = series field current.
Isc = IL + Ish.
Voltage across the load equals
V = Eg-Ia Ra-Isc Rsc = Eg-Ia (Ra+Rsc)
The power generated is equivalent to:
Pg = Eg x Ia.
The power given to the load is equal to:
PL = V x IL.
In a compound generator, the shunt field is stronger than the series field. When the series field assists the shunt field, the generator is said to be commutatively compound.
However, assuming that the series field opposes the shunt field, the generator is referred to as differentially compound.
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