(should be _Harry_ Paul Sprain according to the US 6954019 patent document, not Henry, I have corrected the subject line and added "overunity disputed" to make the thread look more appealing to our fellow Vorts)
Thanks Terry for your objective introduction of my position, in spite of your not agreing with it and of the big dollars at stake. The documents I will refer to are in the public file folders you gave us a link to: http://mysite.verizon.net/vzesfls5/files/ 1/ The coil's DC resistance argument you reported was inspired to me by the rough "sanity check" Ohm's law prediction of coil current at page 5 of the "Sprain Motor Early Analysis by Independent Lab" pdf document. The damped oscillation current trace in CH2 of the "Sprain Motor electric drive pulse waveform photo (BMP)" oscillogram, of which we see more than a half-period, clearly converges to ~2 divisions. This suggests that 2 divisions on the oscillogram scale to 20A (steady state current of a ~1 ohm static resistance coil driven by 20VDC) rather than 2A as claimed. 2/ I have a second argument pointing to the same conclusion: the voltage drop of the coil driving FET, which Terry told me was of the IRF250 family, is of at least 1V as can be seen on the oscillogram (CH1). I remember Jonfli on this list noted that 1V drop was a lot for the claimed low current of 2A, and might be improved by using a FET with a lower ON resistance. I looked up the IRF250 ON resistance (RDSon) and found it is in fact quite low already, 0.085 ohms max, which requires more than 10A to yield the observed 1V voltage drop (Ohm's law again). This suggests that coil current is at least 5 times the claimed value of 2A. My conclusion from 1/ and 2/ is that the Sprain motor's COP, claimed to be overunity ~2, is in fact possibly 10 times and at least five times lower than that i.e. well below unity, due to an erroneous scaling of the input current waveform. I have no explanation as to the source of the error though. Michel ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, June 21, 2006 2:38 AM Subject: [Vo]: Henry Paul Sprain Magnetic Motor > Gnorts, Vorts! > > Thursday afternoon I will meet with the inventor, company officers, and > the CEO of a potential licensee of the technology whose firm did $5.4 B > in business in 2005. I have been in offline discussions with some of > the members of the list whom I respect highly. > > Lately, Michel and I have been discussing the issue with the data given > by the inventor regarding the electrical input of the motor. Michel's > position is that the current measurement is off by a factor of 10 (20A > instead of 2A). His position is understandable since the coil > resistance is less than 1 ohm and the supply voltage is 20 V. See: > > http://mysite.verizon.net/vzesfls5/files/ > > for the public data. > > I am now offering the opportunity for questions from the peanut gallery > that I might pose to the inventor or actually test myself on the > referenced subject. Since I am under a NDA, I might not be able to > answer all questions; but, since I brought this subject to this forum, > I'll give it my best shot. > > Any takers? > > Terry > >
