In some of the 'acceleration under load' videos Romero showed this attached circuit to be responsible for the speedup effect.
I did a simulation of that replacing Hall sensor with a zener diode.
The result is blinking led with power disipation shown on the right graph and on the left we've got power taken from the rotor...

Generator Coil Speedup Circuit Simulation

Hi guys!

Seems like everyone is stucked again with the acceleration on the load.
Meanwhile, i've been playing again with the shorted coils and seems that the hall is affected some how.
I made a small video too   http://youtu.be/F1WX2WMLzkM
I found it interesting becouse no one has mentioned about this effect

Hi Mariusivic

I dont know if it is Hall Effect being influenced by that reed swtich "swtich-shoring" the coil - the rotor speed up is like a speed up you got already with continuous short sort ot but now a swtihc-short,
and the slow-down is a lenz-law type of slow down and all depens on timing at least that is what i see...

also the rotor magnets trigger your reed and you have no real adjsutment to make pulsewidth smaller....but you do have good adjstument of the timing of the switch-short...you  should look with scope to see where those different shorting-effects happen and the pulse width and the ringing is a beautiful thing to see too...

also you should have a FWBR across those coils and fill a capacitor with that reed swtich rather than jsut see afect of rotor speed.....-  that is great plasma you get in that "middle" position - I bet that position wil fill a cap so fast and high you wont beleive it - plus that position seems to cut draw to motor coils too - so its a double bonus there...

What you can do is have two reed swtiches in series, and have another one triggered at same time from another one of the "magnet positions" and then "drift" timing of one to the other and its simple way to control pulse width....you could leave one reed stationary, and just drift the other one a millimeter at a time this way and that way to adjust...

I made timing-disc with very small neo magnets in it - only about 1/16" wide ones (mabye 1.5mm) and use these to trigger my hall effects - and if I want wider pulse width I put a couple or three or four magnets close
together....

anyways I dont see how the motor/drive coil's hall effect is being affected by the coil -shroting
seems to me its the shorted coils thenselves causing the slow down or speed up the timing of the short that affect the rotor speed, and the rotor draw too....

that is unless you are shorting a motor/drive coil??  doesnt look like it but if so, then try bidirectional mosfets, use a driver chip too like a 4422 or 4421, and short the motor/dirve coil down there at the negative peak after the coil has turned off and fully collapsed down below zero voltage and has jsut flipped back over and voltage is just starting to climb back up (the "negaive peak"  - thats where you want to short a motor/drive coil....

the positive peak is the actual drive/motor coil pulse of current itself going into it - and at moment of turn off up there at the positive peak-period is where you want to take out the backemf/recoil of the coil with single diode into cap too....

Hi konehead!

I did try to fill a cap. The voltage vent up to more than 100V but in the same time there were lenz.The high spikes produced by the shorted coil gave me lenz. If i applied this to all the gen coils then we would have nothing but lenz drag.
Now about the video; i said that the hall is affected couse as you can see when the rotor slows down it takes less current and this is not how it should behave.

Hi Mariusivic

you need to have a short pulse width if you dont want rotor to slow - only the PEAK must be shorted.

If you short  before or after the peak, then the shorted coil will slow rotor... but at peak, there is no real polarity to the sinewave sort of as way to explain it - it is when the magnet is right at a point where idoesnt care if it goes forward or backward is maybe a better way to look at it - whrre magnet "rocks".... at that point, and that point ONLY, you can take out power without slowing rotor since the rotor doesnt care at all what happens at that point.
There should be two peaks to short per magnet pass too...

reeds have that double-pulse to them too lots of times so reeds are not very accurate swtiching method.

also it is maximum voltage at peak, so the voltage shorted into the cap will be highest.

because you are using rotor magnet to trip reed swtich your pulsewidth of the short is quite a long period if you looked with scope, and streches before and beyond the peak period that you do want to capture...so using a reed swtich against rotor magnets you should always be getting some lug happening.

Also, the cap you fill up if it is very large UF value it will be hard for the coil-short to fill - so find a good size that goes up quick in volts but still pretty good capacity to it too so you will have some power when it discharges.