What is difference between series and shunt generator?

What is difference between series and shunt generator?

shunt field are parallel and hence have low current. Therefore it have more number of turns and core gets saturated due to which flux will be constant. Series generator have series winding and thus a high armature current is same as field current. Due to which resistance of field winding is low.

What are the advantages of shunt generator?

generator is referred to as shunt-excited. It has the advantage of requiring no independent electrical supply. Residual magnetic flux in the iron poles produces a small generated voltage as the machine is brought up to speed.

What is series generator?

[′sir·ēz ′jen·ə‚rād·ər] (electricity) A generator whose armature winding and field winding are connected in series. Also known as series-wound generator.

What is the main disadvantage of Series generators?

The series motor has poor speed regulation. When the load speed of the machine increases, the DC shunt motor keeps its constant speed from no load to full load. The dc series motor’s Torque drops sharply when the speed increases.

What is a generator shunt field?

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 main disadvantage of a shunt motor?

As the load changes, a shunt wound motor runs at a predictable speed. If variable speed is desired, constant speed can be a disadvantage. The lifetime of the motor is usually not improved by brushes.

What are advantages and disadvantages of shunt?

It has poor efficiency for large load currents. It has high output impedance. The output DC voltage is not absolutely constant because both VBB and VZ voltages decrease with increase in room temperature. The DC output voltage cannot be changed easily as no such means is provided.

Where is series generator used?

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.

What are the disadvantages of generator?

Emissions: One of the major drawbacks of diesel generators is that they produce carbon dioxide, nitrogen oxide, particulate matter, and other dangerous exhausts that release into the atmosphere.

What is the drawback of simple DC generator?

Like other machines, DC generators have some disadvantages, such as: DC generators can’t be applied to a transformer. DC generators have low efficiency because there are copper losses, eddy current losses, hysteresis losses, and mechanical losses. A voltage drop over long distances would occur.

How does shunt wound generator affect output voltage?

Current in the field windings of a shunt-wound generator is independent of the load current (currents in parallel branches are independent of each other). Since field current, and therefore field strength, is not affected by load current, the output voltage remains more nearly constant than does the output voltage of the series-wound generator.

How is the Shunt winding connected to the generator?

In a shunt generator, 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. Therefore, only a part of armature current flows through shunt field winding and the rest flows through the load.

Which is better series or shunt DC motor?

While delivering high torque during an overload, the series motor draws less current and power from the source compared to a shunt or compound DC motor. The main applications where series motors are best suited are for traction applications.

Why are DC shunt motors used in Crane?

Because of this property series motors are widely used in electric traction and in crane application. Speed regulation in the series motor is quite poor. With the increase in the load speed of the machine decreases, DC shunt motor maintains almost constant speed from no load to full load.