What are the characteristics of a generator?

Characteristics of DC Generators

• Open Circuit Characteristic (O.C.C.) (E0/If)
• Internal or Total Characteristic (E/Ia) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (Ia).
• External Characteristic (V/IL)

What are the uses of open circuit characteristics of DC generator?

Open circuit characteristic is also known as magnetic characteristic or no-load saturation characteristic. This characteristic shows the relation between generated emf at no load (E0) and the field current (If) at a given fixed speed.

What is open circuit characteristics of DC shunt generator?

The open circuit characteristics for a DC generator are determined as follows. The field winding of the DC generator (series or shunt) is disconnected from the machine and is separately excited from an external DC source. The generator is run at fixed speed (i.e. rated speed).

How can you determine the open circuit characteristics of synchronous generator?

For getting the Open Circuit Characteristics of Synchronous Machine, the alternator is first driven at its rated speed and the open terminal voltage i.e. voltage across the armature terminal is noted by varying the field current.

What are the characteristics of shunt generator?

A shunt generator is a type of dc generator in which the field winding is connected in parallel with the armature winding so that the terminal voltage of the generator is applied across it. The shunt field winding has many turns of fine wire having high resistance.

What are the characteristics of a DC series generator?

The internal characteristics of a DC series generator is the graph plotted between generated EMF (E) on-load and the armature current. Because of the effect of armature reaction, the magnetic flux on-load will be less than the flux at no-load.

What is short circuit characteristics?

Definition. A short circuit is an abnormal connection between two nodes of an electric circuit intended to be at different voltages. In an ‘ideal’ short circuit, this means there is no resistance and thus no voltage drop across the connection. In real circuits, the result is a connection with almost no resistance.

What are the general characteristics of shunt generator?

What is open circuit voltage of DC motor?

Open-circuit voltage (abbreviated as OCV or VOC ) is the difference of electrical potential between two terminals of a device when disconnected from any circuit. There is no external load connected. No external electric current flows between the terminals.

What is an example of an open circuit?

An example of an open circuit is a string of electric lights that don’t work if one bulb goes out. A signal path, line, or channel that is available for use. An incomplete electrical circuit through which no current can flow. Turning the switch to “off” makes it an open circuit.

What is open circuit characteristics of ALternator?

Concept: Open Circuit Test: This test is used for determining the synchronous impedance. The alternator is running at the rated synchronous speed, and the load terminals are kept open. The excitation current may be increased to get 25\% more than the rated voltage i.e. up to 125\% of the rated voltage.