So what we've got here is a toroidal coil with a neo magnet outside it. The neo magnet, by saturating /part/ of the ferrite core, essentially "cuts" the toroid, so it's no longer going to be a closed system; when we put a current through the coil, we're going to see a chunk of its field "leaking out" of the torus.
The battery juice is chopped by the signal generator, so we've got something close to a square wave going in. There's also going to be some capacitive coupling of the signal generator's output across the FET's gate. Predicting exactly how much power is going into this coil is not going to be easy; the only way to know for sure is to measure it. (The *power*, not the voltage!) Finally, since the coil has been "cut" by the neo magnet, a pickup coil placed next to it will act as the secondary to a "transformer" which consists of the two coils, the core(s), and the neo magnet. What *voltage should we expect to see induced in the pickup coil? ==> I have no idea! First, this configuration is hard to understand to start with, and the coupling between the two coils is confusing, at best. Second, he's feeding it with square waves, not nice smooth easy to understand sine waves; when the FET cuts off, there's going to be an induced voltage spike which may be a lot larger than the original input voltage. That spike may very well be what's charging his caps to his "unexpectedly high" voltage. So, any claim that the induced voltage isn't "what we would expect" is just silly. Unless somebody can come up with a serious analysis of this configuration and make some plausible predictions, it's just anybody's guess what kind of volts should be seen in the pickup coil. And, once again, all he needs to do to get a rough handle on the energy budget is measure power in and power out. He's studiously avoided doing that. Ergo, either he's a lot more ignorant than the level of sophistication exhibited here would suggest, or he doesn't want to know what the energy budget is. (Or he's actually done it and just isn't admitting it.) On 03/18/2010 12:15 PM, Harry Veeder wrote: > http://www.facebook.com/photo.php?pid=3513566&l=e812a3f42e&id=676517267 > > http://tinyurl.com/yewd4sf > > Harry > > > > __________________________________________________________________ > The new Internet Explorer® 8 - Faster, safer, easier. Optimized for Yahoo! > Get it Now for Free! at http://downloads.yahoo.com/ca/internetexplorer/ > >
