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.

how to calculate the power loss of cable?

1 Answers  

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Thumb rule for capacitor bank calculation

1 Answers  

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What are pre paid energy meters ? How it works ?

1 Answers   Siemens,

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what is the difference SCR & TRIAC?

13 Answers   TCS,

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Define the term factor of inertia.

0 Answers  

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What is different between DOL(Direct on line starter), VSD, S/S(Soft starter), and A/T(Auto Transformer)

2 Answers  

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sir i have applied for isro-09. still i did not got the HALL TICKET.

2 Answers  

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What is bandpass of a transformer?

2 Answers  

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what is the difference b/w neutral and earth?what is the need of earthing and what are the different methods for earthing?

4 Answers   NTPC,

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What is measurement?

0 Answers  

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Most electrical terms denoted by first letter of its name but Why current is denoted by "I".

4 Answers  

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Please give the formula for converting from 1 tr refrigeration to kw.

2 Answers   Bugema University,

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