Table of Contents
- 1 What is a separately excited DC generator?
- 2 What are separately excited generators used for?
- 3 What is a self excited DC motor?
- 4 What are the different types of self excited DC generators?
- 5 What is the difference between a self excited and separately excited motor?
- 6 What are the different types of DC generators?
What is a separately excited DC 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 is a self excited generator?
Self-excited DC Generator is a device, in which the current to the field winding is supplied by the generator itself. In self-excited DC generator, the field coils may be connected in parallel with the armature in the series, or it may be connected partly in series and partly in parallel with the armature windings.
What are separately excited generators used for?
Applications of Separately Excited DC Generators These are used in speed regulation tests. These generators operate in a stable condition with any change in field excitation. Therefore, they are also used in supplying power to the DC motors, whose speed being to be controlled.
What is DC separately excited 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. Hence, the motor speed will slow down.
What is a self excited DC motor?
Self Excited DC Motor As the name implies self-excited, hence, in this type of motor, the current in the windings is supplied by the machine or motor itself. Self-excited DC Motor is further divided into shunt wound, and series wound motor.
What are self excited generators?
What are the different types of self excited DC generators?
The three types of self-excited DC generators are:
- Series Wound Generators.
- Shunt Wound Generators.
- Compound Wound Generators.
What is a self excited DC generator?
So a portion of the generated dc power is utilized in the field system. Depending on the connection of the field winding with the armature winding, we can categorize the self-excited DC generators as follows. In shunt wound dc generator we connect the field winding in parallel to the armature. So entire armature voltage appears across the field.
What is the difference between a self excited and separately excited motor?
A ‘self-excited’ motor is one in which the output supplies the field current, as well as the load current. A ‘separately-excited’ motor is one in which the field current is provided from an external source. What happen when you reverse the direction of rotation in a separately excited dc generator?
Why the field conductor of a self excited DC shunt generator is thin?
Due to the low current through the field, we can keep the field conductor very thin here. No Load Characteristics of Self Excited DC Shunt Generator The no-load characteristic of a self excited dc shunt generator is similar to that of a separately excited dc generator.
What are the different types of DC generators?
DC generators are classified into two types on the basis of their methods of field excitation as follows − A separately excited DC generator is the one whose field winding is supplied by an independent external DC source (like a battery).