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Raj Nair

Non-correlation of Peak Noise and Peak Current

Raj Nair, PI consultant at Anasim.
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5/27/2016 2:25:27 AM
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Re: Use of the word "correlation"
Hello Dan, 

Glad you liked and agreed with the article! Thank you for the comment. 

I thought I'd replied to your comment...but do not see it posted here. Here goes nothing, again. 

Look at the equations on the page linked through 'power grid' in the article. They point to the complexity of noise components in any power grid segment. Depending upon the excitation, one or more of the components, resistive, reactive, and resonant, dominate. In extremes of load current shape (DC, or impulse), noise also tends to extremes. Since peak current value loses information about current wave shape, and since it is evident that the wave shape has a significant role in determining peak noise, there is no mathematical or logical basis for a correlation to exist between a maximum current value and the resultant peak noise value seen. 


Raj Nair



Dan L Woodward
Dan L Woodward
5/18/2016 4:18:28 PM
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Use of the word "correlation"
I enjoyed your article and agree with it. However, the voltage peak and the current peak as you described them ARE correlated. They just happened to be out of phase. If you perform a cross correlation, you will find the peak value to be very close to unity.


Dan Woodward

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