What is separately excited DC shunt generator?
A separately excited DC generator is the one whose field winding is supplied by an independent external DC source (like a battery). The magnitude of generated voltage depends upon the speed of rotation of armature and the field current, i.e., greater the speed and the field current, higher is the generated voltage.
What are the 3 types of DC generators?
The three types of self-excited DC generators are:
- Series Wound Generators.
- Shunt Wound Generators.
- Compound Wound Generators.
Is DC shunt generator self excited?
Modern DC generators with field coils are self-excited generators which get started with the initial current in the field coils.
What is difference between DC shunt generator and compound generator?
Short Shunt compound dc generator is in which only shunt field winding is in parallel with the armature winding. Long Shunt compound dc generator is in which shunt field winding is in parallel with both series field and armature winding.
What are the limitations of separately excited DC motor?
Separately excited DC generators have many advantages over self-excited DC generators. It can operate in stable condition with any field excitation and gives wide range of output voltage. The main disadvantage of these kinds of generators is that it is very expensive of providing a separate excitation source.
Why do we use separately excited DC generators?
Applications of Separately Excited DC Generators Because of their ability of giving wide range of voltage output, they are generally used for testing purpose in the laboratories. Separately excited generators operate in a stable condition with any variation in field excitation.
What is shunt DC generator?
A shunt generator is a type of direct current electric generator in which field winding and armature winding are connected in parallel, and in which the armature supplies both the load current and the field current.
What is the difference between separately excited DC type generator and self excited DC type generator?
In a separately excited (S.E.) machine, the field winding is connected to a separate voltage source while, in a self excited generator field winding is connected across the armature terminals (provides its exciting current) .
What is a separately excited DC motor?
A separately excited dc motor is a motor whose field circuit is supplied from a separate constant-voltage power supply, while a shunt dc motor is a motor whose field circuit gets its power directly across the armature terminals of the motor.
What type of generator can be either self excited or separately excited?
DC Generator is classified according to the methods of their field excitation. By excitation, the DC Generators are classified as Separately excited DC Generators and Self-excited DC Generators. There is also Permanent magnet type DC generators.
What is the difference between separately excited and self excited DC generator?
What is the advantage of separately excited generator over self excited generator?