Zoltan's Simulation

poynt99 · July 16, 2009, 11:39:26 PM

After having examined Zoltan's calculations on the one graph, it appears there are likely other problems causing the amplitude discrepancies.

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poynt99 · July 17, 2009, 08:39:56 AM

Can anyone explain why a factor of "1000 times" is being used in many of the calculations shown on one of the graphs?

Also there is a "left" value and a "right" value, then a value of the difference, which appears to be the result labeled on his diagram.

Can anyone make sense of this? I'm having some difficulty with understanding this method.

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poynt99 · July 18, 2009, 08:48:41 PM

REVISED RESULTS

I've re-discovered that there is no such thing as RMS power. I had known this some time ago, but forgot and began using it again. My bad.

Turns out that getting the RMS power of any device in SPICE is not correct. RMS values are only valid for current or voltage. And once again, there is no such thing as RMS power! Only Average power.

How do you arrive at Average Power? You use an RMS voltage (V²/R) or RMS current (I²*R) , or both (V x I).

So the new results don't show overunity. The COP is now 0.867:1 (using R1 power/source power). See the attached scope shot of all the dissipative powers, which almost add up perfectly btw.

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BEP · July 19, 2009, 09:41:33 AM

Quote from: poynt99 on July 18, 2009, 08:48:41 PM
And once again, there is no such thing as RMS power! Only Average power.
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This is a great piece of advice to share. I hope all in this field make use of it.

poynt99 · July 19, 2009, 10:27:21 AM

Hi BEP.

Yeah this can be tricky stuff.

I'm on to yet another "gotcha" I think. Will post something soon if it turns out valid.

Here's the article that got me back on track regarding Average and RMS values. It's simple and clear, really well done I think. All should have a read.

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