Answer / nitin kumar nafade

DC excitation is used to produce contast magnetic field.If
AC used alternating magnetic filed will produce.

Answer / michael von zechlin

Not all excitation systems use DC. There are excitation
systems which use high frequency AC as the input to the
generator field. There are a couple of reasons for this.
One is to prevent slip rings (if they are installed) from
excessive wear. Second, the regulator can be built smaller
and react quicker with less power loss. There are other
reasons. Will leave the rest for you to ponder.

can anybody find out the result. I am lil bit confused about my equation.

1 Answers   Student,

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Give accurate definitions for these electric terms: Inductor Inductance Inductive Induction Reactance Reactive Esam Baraka ٢١ ساعة

0 Answers   HMK,

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What are the basic components of the feedback control system?

0 Answers  

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what is the other name of dc series motor

2 Answers  

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will a fluorescent bulb work when dc is passed through it?? if not why??

4 Answers   TCS,

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we want install 11KV generator to supply power 12km far from the power house.Load to be fed is 1MW.which conductor should we use and wat will be transmission line losses?

1 Answers   CEM Engineering,

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Calculate the demand in KVA for a three phase 440V power source drawing 1100A current

5 Answers  

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in 3 phase induction motor resistance value is how much

1 Answers  

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What is a soft start?

1 Answers   Focus,

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the circuit having same properties in either direction is known as.......

2 Answers  

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In an electrical conductor, if current flows because of flow of electrons, then why not the conductor gets thinner day by day???

1 Answers  

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Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

0 Answers  

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