Answer / shiv shankar

the exicter is coupled to the generator shaft. the exciter
carries the permanent magnet gen., ac gen., diode wheel
arrangement for rectification and dc generated is directly
fed to rotor via internal contacts through shaft hole

Answer / kj

Normally brushes were used with a commutator with
generators with a rotaring field or sliprings for
stationary field.
As the brushes always would require servicing generator
manufacturers found ways to eliminate them. To do this they
used 2 generators on the same shaft. A small one (exciter)
with a stationary field to produce a 3 phase supply on the
rotor. The output from this generator is rectified with the
rotating diodes and feed into the main rotor. This is a
rotating field generator.
The voltage is controlled by controlling the field of the
small exciter generator. A second benefit is that the field
current is reduced from anywhere between 25 to 100 amps to
only 2 to 10 amps. This makes the control of the field much
easier and cheaper.

Answer / sakthivel perambalur

we know that dynamically induced emf and statically induced emf

why does connected a indutor with mnsformeretering core of current transformer ?

0 Answers  

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what is reasion of harmonic create the power supply , And how to reduced to harmonic

1 Answers   Turbo,

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How to calculate u.p.s load parsentage plz give me formula

1 Answers  

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What is an Automatic Voltage Regultor & what is its use? What are the general componets we use to design an Automatic Voltage Regulator..What are the factors to be considered for its design?

3 Answers  

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how many earthings will be required for 1 isolator & 2 VCB, which are connected to a 1600 KVA Distribution TRansformer?

2 Answers  

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Lt trivector meter with ring type CT.Spec of meter are 3x240 v, -/5A. Ring ct spec. are 60/5A, line voltage- IL .66/3.0KV..what is the multiplying factor

1 Answers  

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IN SINGLE PH TRANSFORMER IF LEKAGE IMPEDANCE DROP IS NEGLECTED ,THE FLUX IN THE MAGNETIC CORE and the lekage flux linking a winding are a)proportional to the applied v to the winding i respectively.

0 Answers  

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wht is the difference between volatge and wattage ? how can it be converted ? (like 15w = 6v ) like tht... ? actually what tht means ?

3 Answers  

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What is Autodialer used in FAS????

2 Answers   Emerson,

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Why is negative feedback invariably preferred in closed loop system?

0 Answers  

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What is the minimum permissive IR value for LT & HT motor for safe starting?

1 Answers   Rukmani,

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last week we did the REF relay test by closing single pole (R phase) of CB and apply 380V at the primary of delta transformer. we get 33A at the primary of the R phase star end. but we get 380A at both R an B in delta side. how and why?

1 Answers   Siemens,

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