Answer / abdul hameed

first we need DC current in the rotor second we need AVR this device controlled the the voltage which feeding the rotor.this
method is suitably for brush and brush less generator

Answer / vinod

EXTERNAL DC SOURCE

Answer / siddhu

In an alternator the rotor acts as a field winding it produces rotating flux when excited with dc current by an external dc source when this flux cuts the armature, current is induced in it.

if field breaker of generator is closed prior to its rated speed on a power generating unit. what will be the effect on generator, unit transformer and starting transformer.

0 Answers   Power Plant,

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A dc motor running on dc drive whose input is 3ph AC what will happen if we change the phase sequence of dc drive for e.g (R Y B) is connect as R B Y, will the motor run as same as previously running before changing phase without any effect

4 Answers  

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How to operate a ac chilar plant?

0 Answers  

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what is the diffrence between current transformer and voltage trasformer

3 Answers  

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What is the main use of rotary phase converter ?

0 Answers  

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What is flow meter?

2 Answers  

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how can we calculate the cooper armed cable size if the protection load of main fuse is 80 ampere.

1 Answers  

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why should series motor be started with load and shunt motor should be started without load??????

7 Answers  

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how to calculate lux level in out door (yard lighting) please expalin with a example

1 Answers   IVRCL,

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who is invented transforner (230v).......

2 Answers  

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What is meant by a stray loss of a induction motor??? What is the equation to find it

0 Answers  

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Why inductor short on dc and capacitor allow to flow ac?

1 Answers  

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