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sauravbabu
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Engineering Fields - Electrical Engineering - New Member

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AC Generator

09/14/2014 10:52 AM

Hi,

What is WDF with regards to diesel generator? Because the generated wave is sinusoidal, this appears to be some form of measurement for it. But what is it? How its upper range of 8% can be justified? And what is its lower range?

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SolarEagle
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#1

Re: AC generator

09/14/2014 11:08 AM

Wigner Distribution Function ...?
"The Wigner transform (also known as the Wigner Distribution Function or WDF) maps a 1D time signal U(t) into a 2D time-frequency representation. Conceptually, the WDF is analogous to a musical score where the time axis is horizontal and the frequencies (notes) are plotted on a vertical axis. The WDF is defined by the equation:

http://www.wavemetrics.com/products/igorpro/dataanalysis/signalprocessing/timefrequency.htm

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SolarEagle
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#2
In reply to #1

Re: AC generator

09/14/2014 12:44 PM

Sinusoidal waveform basics.....an addendum

...." the instantaneous value of the waveform and also its direction will vary according to the position of the coil within the magnetic field"....

http://www.electronics-tutorials.ws/accircuits/sinusoidal-waveform.html

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SolarEagle
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#3
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Re: AC generator

09/14/2014 2:08 PM

....continued....

https://www.eagle.org/eagleExternalPortalWEB/ShowProperty/BEA%20Repository/Rules&Guides/Current/150_CtrlofHarmonicsinElecPowerSystems/Pub150_ElHarmonics

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RAMConsult
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#4

Re: AC Generator

09/14/2014 8:57 PM

It's acronym guessing time again in CR4! As used in this context it appears that it stands for Waveform Distortion Factor, probably a measure of how much the generator's waveform varies from a pure sinusoidal wave. With so little information from OP it's tough to justify the 8%, but 0% (a pure sine wave) would seem to be a reasonable lower limit.

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Jimh77
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#5

Re: AC Generator

09/15/2014 12:33 AM

Elmer Fudd, What D F! Where's that rabbit?

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Anonymous Poster #1
#6

Re: AC Generator

09/15/2014 7:05 AM

http://www.acronymfinder.com/WDF.html
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PWSlack
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#7
In reply to #6

Re: AC Generator

09/15/2014 7:08 AM

"Waste Derived Fuel" sounds tempting in the current circumstances.

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