Answer / coolsunil56

dc excitation is given to rotor so that it gets magnetised and gets locked with magnetic revolving field of statorand start rotating with same speed means at synchronous speed.

Answer / k.sri405

dc can produced flux but it is constant in nature so magnet
have constant pole. that's why this pole gets locked with
the poles of stator

Answer / kundanmalani1990

Excitaion r use to the pole r converte to the parmanet magnet so the excitation r use

Answer / naveen

D.C Supply in alternater  used for genarating magnatic field in roter ,But nature of field would be Stationary Not fluctuating, when Roter get speed from prime mover  its Induced VOLTAGE AND CURRENT in Armature. 

Answer / vamsi

ac alternator is not a salf stator so dc supply for self
motor,dc can not produce flux.

description about dry type transformers

0 Answers  

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pls someone send me sample question papers along with the key.thanks in advance

0 Answers   HPCL,

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which is better to use svc or synchronous condenser why ?

0 Answers  

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if 2500 KVA TRANSFORMER CAPACITY.33KV INCOMING HOW ARE AMPEAR PRIMERY SAID

3 Answers   Cipla,

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Define cuttoff frequency?

0 Answers  

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How to configure the drives in PLC, through Profibus commnication. And to how to address it?

0 Answers  

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Why a motor blower cobination draw more current at winter than summer?

1 Answers  

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In case you don't have coal and salt for earthing, how can you achieve good temporary earthing?

1 Answers   Focus Energy, NHPC, ONGC,

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dg started in plc mode and load taken later one battery terminal connection will be disconnected by loose connection what will happen for dg and shall we connect battery terminals while dg in load time?

0 Answers  

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what is the transformer

6 Answers  

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pls tell me function of closing coil of A.C.B.

0 Answers  

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MICOM P122 OC/EF RELAY HAVE HARMONIC RESTRAIN OR NOT?

1 Answers  

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