Tom Schum's site: http://mysite.verizon.net/vzesfls5/files/
has some detailed data from Paul Sprain on EMILIE. For the electrical data, Tom did a piecewise integration of the V and I curves and found the three pulse energy was closer to 2.89 J.
Also posted is a very good image of the torque display. The "thickness" of the torque pulses are actually a composit of over many smaller sinusoids as the rotor mags move between stator mags. The large trough is the roughly 20 degree gap in the magnet spiral. I'm going to try to measure the area under the torque curve for 1.5 cycles; however, my eyeball tells me that the energy generated during this period is closer to 7 J, IMO.
You can look for yourself; but, I would guestimate EMILIE's COP to be closer to 2.42 than the 1.89 that the inventor claims.
A question for the list: As the rotor approaches the electromagnetic coil, you can see the V curve go negative. This is expected; but, since there is no current flow due to the gating device, does the rotor experience the back EMF due to the Lenz effect? The reason I ask is that Paul is presently using a simple toggle to send the 28 ms pulse to the electromag. If one attempted to tap the induced energy as the rotor approaches and departs the coil, could one increase the COP? Or, would the Lenz effect negate any additional gain?
I honestly think that, if you can push the electrical efficiency to a COP of near 3.0, you might could make the current design of EMILIE self-run. It would take some supercap storage and some sophisticated waveform switching (I would probably sawtooth the V pulse) but it looks doable.
Terry ___________________________________________________ Try the New Netscape Mail Today! Virtually Spam-Free | More Storage | Import Your Contact List http://mail.netscape.com
