Hi Daniel,
Okay on confirming coil-magnet positioning, I just wished to clarify it a 100%... In the patent application drawing Fig. 6b shows a horse shoe shaped iron yoke to symbolically "hold" the magnets and while the presence of that iron can collect flux from mainly the same side of the magnet where the yoke is, the front flux towards the coils may be influenced but a little indeed. (Flux collection by the horse shoe iron piece is more pronounced and expressedly shown in Fig. 6a by the drawn flux lines when the magnets are "hold" by their direction of magnetization and not by perpendiculary to it as in Fig. 6b.)
When I wrote about the coil-magnet length ratio, I also meant the coil length in itself (although I did not stress this). If you consider the zero force motor first video, in which John pulled out the core and then inserted it, the coil was too big both in length and in diameter with respect to the rotor magnets. In his very short post on the zero force motor coil at energetic forum John wrote the coil was a standard Mono-Pole coil on a solder roll with maybe 2000 turns of #23 wire, and the magnets were Neo 1/2 x 1/8 round magnets.
Now a solder roll is much bigger than the 0.5" OD, 0.125" long cylinder magnets so I believe this may also contribute to a low Lenz, low bemf behaviour.
(His induced positive peak voltage in the center between two on-pulses was 3.5V with core and about 1.5V without the core, with that huge coil and small magnets.)
Unfortunately, the 3 videos on his first zero force motor he showed at energetic forum back then were removed from youtube, see this link when John showed them: Use for the Tesla Switch - Page 49
I do not know why there were 3 videos, and I guess the single video John showed on a zero force motor with also single coil last August in the R-charge windows motor thread (Reply #19) must have been included in the three videos. Alas, the link John gave to his zero force motor video in Reply #19 now does not show the video either...
Greetings, Gyula
Okay on confirming coil-magnet positioning, I just wished to clarify it a 100%... In the patent application drawing Fig. 6b shows a horse shoe shaped iron yoke to symbolically "hold" the magnets and while the presence of that iron can collect flux from mainly the same side of the magnet where the yoke is, the front flux towards the coils may be influenced but a little indeed. (Flux collection by the horse shoe iron piece is more pronounced and expressedly shown in Fig. 6a by the drawn flux lines when the magnets are "hold" by their direction of magnetization and not by perpendiculary to it as in Fig. 6b.)
When I wrote about the coil-magnet length ratio, I also meant the coil length in itself (although I did not stress this). If you consider the zero force motor first video, in which John pulled out the core and then inserted it, the coil was too big both in length and in diameter with respect to the rotor magnets. In his very short post on the zero force motor coil at energetic forum John wrote the coil was a standard Mono-Pole coil on a solder roll with maybe 2000 turns of #23 wire, and the magnets were Neo 1/2 x 1/8 round magnets.
Now a solder roll is much bigger than the 0.5" OD, 0.125" long cylinder magnets so I believe this may also contribute to a low Lenz, low bemf behaviour.
(His induced positive peak voltage in the center between two on-pulses was 3.5V with core and about 1.5V without the core, with that huge coil and small magnets.)
Unfortunately, the 3 videos on his first zero force motor he showed at energetic forum back then were removed from youtube, see this link when John showed them: Use for the Tesla Switch - Page 49
I do not know why there were 3 videos, and I guess the single video John showed on a zero force motor with also single coil last August in the R-charge windows motor thread (Reply #19) must have been included in the three videos. Alas, the link John gave to his zero force motor video in Reply #19 now does not show the video either...
Greetings, Gyula
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