TimHarwood's CD Adams Motor (c) 2001

TimHarwood's CD Adams Motor (c) 2001

Adams Motors Mosfet

Bill offers the following advice based upon his research and analysis with Dragone cores:

The PNP needs a diode to gate the current back to the battery. Mosfets have this diode built in. Because you are using a PNP, the negative energy has nowhere to go but remain in the coil and ring. If the negative energy were high enough, it could breakdown the transistor. Keep in mind that negative energy appears as a high voltage when the transistor FIRST turns on! Don't confuse this with the Lenz's Law effect when the transistor turns off (back emf). I should also mention that this negative energy is a time-reversed current flow coming from the coil back to the battery. Ideally, a switch should be used instead of a transistor, and this is what he means by commutation (Mr Adams is still using commutation timing). I think a mosfet will do very nicely instead of a PNP transistor with commutation diode. My latest device uses a very good mosfet (MTY100N10E) and a commutation schottky diode (MBR6045WT) in parallel.

1. Wind one or two solid 24awg stators in series, and get the stator/s running slightly chilled, the power transistor ambient, and the stator supply wire cold. Any rotor instability, air gaps over 1.5mm, etc, will kill off the cooling effect fairly quickly. The basic low tech mechanical stuff most certainly has to be done correctly, and the over-unity effect is quite sensitive to the rotor / stator geometry, which is where the 'action' happens. In my experience, the real test of the depth of resonance you obtain, can be found in the stator supply wire - it should have a very clear ambient thermal sink effect. THIS IS THE COLD PART. Do not expect the whole device to be universally cold, it is not. Simple ambient running for extended periods is a very good result.

2. Once the stator supply wire chill effect is fully manifested and any rotor instability issues attended to, try seeing how much 'back emf you can pull off. You will be most pleasantly surprised by your results. The record to date is 97% of input using NIB magnets and magnetite cores, although it is not suggested NIB magnets and magnetite is necessarily suitable for CD motors. Of more immediate relevance an AVERAGED 80% of input has been recorded in the hard drive motor using permalloy cores. Finally note: it is of course time reversed emf and not back emf. This does mean that a circuit which looks fine from a conventional point of view is not always guaranteed to work. Please keep that in mind. But optimize for coldness before you bother attempting any numbers. Always first things first.

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