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Question
what is the VVVFD and?
 Question Submitted By :: Vijay
I also faced this Question!!     Rank Answer Posted By  
 
  Re: what is the VVVFD and?
Answer
# 1
vvvfd means varieable voltage variable freqwency drive. 
Is This Answer Correct ?    6 Yes 0 No
Vijay
 
  Re: what is the VVVFD and?
Answer
# 2
The electric drive which uses variable voltage and variable
frequency for its operation and control is called VVVF
drives.With the technology improvement in the realm of
power electronics now it is more easy to work with VVVF.
Cycloconverters are employed to obtain variable frequency
up to 400Hz.

VVVF find applications in railways traction,airplane etc.

Author:arbelectbit@yahoo.com
 
Is This Answer Correct ?    5 Yes 0 No
Iamdon
[SAIL/B.I.T.Sindri M.Tech(Control Enginee]
 
 
 
  Re: what is the VVVFD and?
Answer
# 3
generaly AC drive supplied with AC voltage , but where we
need variable source , there we use VVVFD(variable voltage
variable frequency drive).
raquirement for VVVFD.......
1.ac source
2.rectfier circuit.
3.filter circuit.
4.inverter circuit
5.IGBT
 
Is This Answer Correct ?    2 Yes 0 No
Shashi Bhushan
 
  Re: what is the VVVFD and?
Answer
# 4
varible voltage and varible frquency drive 
Is This Answer Correct ?    1 Yes 0 No
Kaushal
 

 
 
 
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How i can select current transformer and meters for the upgrading the panal..for 200kw to 600kw....i need to select monitoring and protection ct,s and apmpire meter ,kw meter too.   1
In domestic supply, when neutral touches earth the earth leakage trips. Does this mean that if the star (neutral) point of an alternator is earthed that power will flow to earth i.e. a direct short to earth?   1
What will hapen if we run generator below 47.6hz frequency? TATA 8
Why is transformer connect parallel? why not series? ....plz... WBSEDCL 3
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