What are the characteristics of DC shunt generator?

External Characteristic of Shunt Wound DC Generator Ohmic drop due to armature resistance gives lesser terminal voltage the generated voltage. That is why the curve lies below the internal characteristic curve. The terminal voltage can always be maintained constant by adjusting the of the load terminal.

How would you define separately excited DC generator?

A DC generator whose field winding or coil is energised by a separate or external DC source is called a separately excited DC Generator. The flux produced by the poles depends upon the field current with the unsaturated region of magnetic material of the poles. i.e. flux is directly proportional to the field current.

What is the reason why a separately excited DC generator is no longer used today?

Because it requires a separate DC power supply, the separately excited machine is usually used only when a wide range of voltage control (generator) or speed control (motor) is required.

What are the applications of DC shunt generator?

Applications of DC Generators

These generators are used to charge batteries, provide lighting and provide excitation to alternators.
They are used to provide field excitation current for regenerative braking in DC locomotives.
They are used in DC motors where speed control is necessary.

How does a DC shunt generator work?

Most of the shunt DC generators work on the principle of self-excitation. Following a positive feedback like action, the flux in a self-excited DC generator, builds up from a small amount of residual magnetism present in the field poles. In self-excited DC generators, the field winding is connected across the armature.

Where are separately excited generators used?

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 are the advantages of DC series motor?

Advantages of DC Series Motor Dc series motor have good accelerating torque. Dc series motor have a relatively huge starting torques. Dc series motor delivers high torque during an overload. The dc series motor draws less current and power from the source compared to a shunt or compound motor.

What are the characteristics of dc motor?

Generally, three characteristic curves are considered important for DC motors which are, (i) Torque vs. armature current, (ii) Speed vs. armature current and (iii) Speed vs. torque.

What are the advantages and disadvantages of separately excited DC generator?

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.

What are the characteristics of DC shunt generator? External Characteristic of Shunt Wound DC Generator Ohmic drop due to armature resistance gives lesser terminal voltage the generated voltage. That is why the curve lies below the internal characteristic curve. The terminal voltage can always be maintained constant by adjusting the of the load terminal. How…