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 WORK A VFD?SAY SIMPLE METHOD

1 Answers   GE,

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how to control dc motor?

0 Answers  

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What are the limiting factor for controlling maximum hot point temperature within a hydrogen and water cooled generator?

1 Answers  

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what is the range of maximum DOL and SDS can be use for pump and fan application

0 Answers  

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Which type of a.c motor is used in the fan (ceiling fan, exhaust fan, pedestal fan, bracket fan etc) which are find in the houses ?

0 Answers  

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How are harmonics produced in AC machines?

4 Answers  

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Dear sir, In our plant have Station Transformer having capacity,i want to know, why LV side 40 - 40MVA is given? & how we can get 6.3 KV supply from tertiary(i.e. Open delta connection), Vector Group YNyn0 - yn0 +d MVA Rating 80MVA / 40 - 40MVA + 26.7MVA Voltage rating 420 (Tap range +6,to -10)81.25% /11.5KV - 11.5KV +6.3KV

0 Answers   Bhel,

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For the requirement of a furnace of temperature range up to 1200 oC using silicon carbide rods, What is the required rate of transformer needed (please do it with all details)?

0 Answers   Intel,

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why in dc generator field rheostate kept in maximum position?

1 Answers  

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What will be result if we connect LT votage to the terminal of HT motor?

0 Answers   Equate,

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What is the effect of positive feedback on stability of the system?

0 Answers  

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what is the different between bus section and bus coupler

2 Answers  

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