On 12/30/2009 03:31 PM, Abd ul-Rahman Lomax wrote: > At 12:14 PM 12/30/2009, Craig Haynie wrote: >> Here are two more replications: > >> The first link shows no apparent current increase as the speed of the >> rotor picks up, and tends to really display the effect that is >> perplexing all of these people. >> >> http://www.youtube.com/user/m1a9r9s9#p/u/2/nDABKqdB538 > > Rather, the key to the effect is the transitions. It is the switching > of the response of the toroid to the permanent magnets that produces > the acceleration of the rotor. Steady-state on, the rotor is > freewheeling. Constant current, independent of rotor speed. > Steady-state off, likewise, no effect on current (zero) from rotor speed.
Wait -- after reading your descriptions (and others), if I understand what the descriptions describe, it looks like the "key" is somewhere else. Look at what we've got: We have a magnetic core in a coil, and a separate movable magnet, which can move past the core/coil combination. Switch the coil on, the field of the core is canceled. A while later, switch it off, the field in the core comes back. You put energy in when you switch it on, you get it back when you switch it off; to the extent that the system gets warm in between you get back less than you put in. Fine, but that's not where the "motor" part comes in. The "motor" part is the interaction between the "other" magnet and the coil. The full system is apparently this: 1) A magnet moves close to the magnetic core. It's attracted to the core, so it gains mechanical energy during this phase. 2) At closest approach, the coil turns on, energy goes into the system, and the core is quenched. 3) The magnet moves away from the core AND coil. Since the field of the core is canceled, this apparently takes no work. 4) At maximum separation the coil is turned off. The only interaction between a live electrical circuit and a physical object on which it can do work is in step (3). In that step, the coil is energized in such a way that it would REPEL the magnet, which is moving away from it. Think about it -- the core attracts the other magnet, and the coil is canceling that attraction, so the coil is repelling the other magnet. In essence, the coil is pushing the magnet away, working against the attractive force of the coil. So, the phase where work is being done by the battery is the phase when the coil is energized and the magnet and coil are moving apart. To see where and how much energy is being pumped into the system to do useful work, look at the induced voltage in the coil during that phase. Say it again, louder: Linear superposition! Sure, the magnetization of the core changes, but to a very large extent, when you "cancel" the field of the core, you're looking at the coil and core fields adding linearly. The field of the coil is still there, still interacting with the environment, but it's hidden by the superposed field of the core.
