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What are the causes of failure of self excited generator?

Anonymous

∙ 12y ago

Updated: 8/11/2023

there is problem in AVR and magnetic strength.

Wiki User

∙ 15y ago

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Q: What are the causes of failure of self excited generator?

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Can you use the separately excited shunt generator machine as self excited generator?

You have a seperately excited generator and then you have a shunt generator which has the field winding in parallel with the armature terminals. In DC machines a separately excited generator could be run as a shunt generator provided the field winding is designed to work on the generated voltage. A separately excited alternator needs a DC supply for the field winding. In car alternators that is taken from the main winding via a rectifier and a voltage regulator.

Generator how it excite its self?

A generator excites it self due to a high power thyristors feeding to a rotor through slip rings. Once excited it lessons maintenance and operational requirements.

How the doubly fed induction generator build up voltage?

If a self-excited generator lost all its residual magnetism, can it build up an output voltage?

What is dc separately excited shunt generator?

Either or both can be separately excited. To generate voltage you need a big magnet( the field). Most generators use an electro-magnet. Now the electro-magnet needs a source of power (electricity). We could use the generators own output to excite the field (magnet), this is called self excitation. The problem with self excitation is that we have to wait for the generator to turn and start generating, also to start generating (Building up) there must be some left over magnetism from the last time it was run (called residual magnetism) or not even a little voltage will be generated to start the field current flowing. To solve these problems we could use separately excited. This means we must have a separate source of power to excite the field to produce the magnetism. Sometimes a battery or gasoline driven generator is used to excite the field of a very large generator to get it generating and then we can use some of the generated output to either recharge the battery or switch over to from the battery. In any case we have adjustable control of the generator all the time. This is why most generators are designed to be separately excited. And that is why you car has a voltage regulator. It wakes up the alternator when the engine is started by separately exciting it (the field) with the battery and then regulates the output voltage of the alternator as the engine changes speed with the driver's commands from the gas pedal.

What are the condition of building up a self excited shunt generator?

self excited generator must be started without any external load attached ,an external load will continuously drain off the build up voltage and prevent the generator from reaching its proper operating voltage. also the presence of residual magnetism plays an important role And the field current resistance should be less than critic field circuit resistance

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Related Questions

Different types of DC generator?

There are two types me dc generator 1 separately excited dc generator 2 self excited dc generator

What is a brush less generator?

It is self excited generator, no external excitation circuit.

What is separately-excited generator?

in a separately excited generator the field coils are excited from a separate source like a dc battery may be or any other small generator. They are self starting generators.

Answering Which one is a separately excited generator - ac generator or dc generator?

Excitation is the phenomenon by which you control the excitation of field winding of a generator. In DC generator field winding is placed on stator and this field winding can be self excited or seperately excited depending upon the type on generator used. AC generators can also be self excited or seperately excited type but field winding is placed on rotor nad armature winding on stator.

How you control the speed of self excited dc generator?

Easy. By controlling the speed of the motor or whatever is turning the generator's shaft.

What is excitation in generator and 2 methods each?

when the current is passing through the winding then it is called "Excitation". Types of excitation (1)seperately excited generator. (2)self excited generator. self generator is classified into 3 types. 1.shunt generator. 2.series generator. 3.compound generator. compoud generator is again classified into 2 types. 1.short shunt generator. 2.long shunt generator.

What are different methods of excitation of dc generator?

when the current is passing through the winding then it is called "Excitation". Types of excitation (1)seperately excited generator. (2)self excited generator. self generator is classified into 3 types. 1.shunt generator. 2.series generator. 3.compound generator. compoud generator is again classified into 2 types. 1.short shunt generator. 2.long shunt generator.

Can you use the separately excited shunt generator machine as self excited generator?

You have a seperately excited generator and then you have a shunt generator which has the field winding in parallel with the armature terminals. In DC machines a separately excited generator could be run as a shunt generator provided the field winding is designed to work on the generated voltage. A separately excited alternator needs a DC supply for the field winding. In car alternators that is taken from the main winding via a rectifier and a voltage regulator.

Generator how it excite its self?

A generator excites it self due to a high power thyristors feeding to a rotor through slip rings. Once excited it lessons maintenance and operational requirements.

How voltage build-up in a self-excited generator?

What can usually happen is the permanent magnets in the generator will become energized, and like static shocks, will store energy in them.

How the doubly fed induction generator build up voltage?

If a self-excited generator lost all its residual magnetism, can it build up an output voltage?

What happen if you change the connection of armeture of dc self excited generator?

the rotating will chang.but if you chang terminal connection nothing wont happen.

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