FUELLESS CAR PROTOTYPE by ISMAEL MOTOR

[MileHigh]

Kehyo77:

Quoting Konehead:

as the reason for any multiple shorts as opposed to just one very quick one, is to first cause the ringing, via the first short, then after that, the additional shorts must align themselves in timing with only the peaks of the rings created....

Look at Konehead's circuit.  After the short is removed the coil will discharge into one of the capacitors through a diode.  By definition there will be no ringing.  The coil will discharge all of it's stored energy into the cap via the diode and then everything stops dead.  There is no LC component to make any oscillation.  The coil will not self-oscillate with it's own internal vestigal capacitance because there will be no energy available for the oscillation - all of the energy will have been transferred into the capacitor.  This will be very easy to verify on the bench.

I know that you are deferring to Konehead but I can tell you from reading him that he is no electronics expert by any means.  The real challenge for a circuit like this is to make a timing diagram like I already explained.  If you don't make a timing diagram then it's almost like you are operating blind.  You end up just having fun but not really being serious, your choice.  I also am aware that almost nobody makes serious timing diagrams, and they are all making a mistake if they truly want to understand their pulse motor circuits.

MileHigh

[MileHigh]

Kehyo77:

Just a comment for you if you are going to try to build Konehead's circuit.  All that it does is temporarily store energy in the capacitors before the energy in the capacitors gets discharged into some sort of a load.  You don't gain anything by doing this and you increase the complexity of the output section quite a bit.  I know that Konehead believes that somehow short pulses will fill up the capacitors without putting any Lenz drag on the rotor but that is simply not true, it's a fantasy.

It still might be a fun exercise to build it anyways because of the challenge of synchronizing the Arduino timing signals with the spinning rotor magnets.

MileHigh

[konehead]

Hi Kehyo
I make rotor-discs with really small neo magnets in them (1/16" wide X 1/4" long so about 1.5mm wide and 6mm long approx) they are really cheap to get on magnets4less site.you can cluster the magnets to make pulse widht longer too...
BUT I found that just one of these very-small magnets triggering a halleffect, still does not make for small-enough pulse width to the coil short, to make sure the rotor does not slow at all when the caps fill.
So, I used two hall effects, and two mosfets (bidirectional they happen to be) and then hooked up these IN SERIES....a 4422 driver runs one mosfet, a 4421 driver the other, so this makes it easy way to make a mosfet either Non-SWoff, or Noff-SWon....
then by adjsuting the distance between the two halleffects, (both triggered by same small trigger-magnet, or two magnets in trigger-rotor both exactly in phase) now you can adjust pulse width down to being very very narrow...and now there will be absoutley no extra draw as the caps fill up.
mabye you can do it with your arduino somehow -  have a small magne be the "trigger" for a very small pulse width via two mosfets in series, one Non-SWoff and other Noff-SWon....anyway this worked great for me and I came up with fact that at 60hz, (as example)  a single peak coil-short event needs to be less than 1/2ms ....

anyways here is the circuit - note that the mosfets are bidirectional in this case, and also I have caps filling up from the backemf/recoil too (other subject), but note how the mosfets connect in series and the two halleffects, and the 4421 and 4422 drivers, to adjsut pulsewidth:

[kEhYo77]

Hi Konehead

4422 driver runs one mosfet, a 4421 driver the other, so this makes it easy way to make a mosfet either Non-SWoff, or Noff-SWon....

What a brilliant idea!

Yes, I prefer to do it with Arduino, where the hall sensor will just trigger with a rising edge for example a routine by hardware interrupt.
Then the timing can be adjusted from this point and gives me even more freedom to easily change it with a potentiometer for instance or to
make it self regulate automatically depending on the speed of the rotor.


Thanks!


kEhYo

[konehead]

hi Kehyo
that 4421 or 4422 driver chip for Non-SWoff or Noff-SWon mosfets works really good other ways to do it too, like changing the hall effect to one flipped over but easier to jsut pop out the driver chip and put another in....anyways mabye you can program the arduino to trip a 4421 or 4422 driver for a diode-plug like output circuit (two stage) or whatever you want to do...
also a guy named "RS" drew up this schematic on using a hall-effect to send the inital signal to 556 timer, and then you can set the capture-period, and then the frequency of chopping - this is meant for miltiple peak coil shorting, but whatever you want to do with it - I havent tried it or built it, but here it is.... maybe this can give you some ideas that will match up with arduino program from this I dont know...