Scope shots of clean kicks

[bob.rennips]

Things I'd like to be able to do but can't!

1. Adjustable pulse width on a per coil basis - so that each coil is only on for the minimum amount of time to bring the magnetic field up to a certain level.

2. Rough phase setting - ability to set the approximate phase between coils. So if you have 3 coils you have 120 degree out of phase and 4 coils 90 degrees out of phase.

3. Fine phase setting - what is important is the lining up of the turn-off times of one coil with the turn on times of another coil. The ability to adjust the pulse width will also screw up the turn-off alignment. I'd like to be able to adjust the phase so if i needed a certain amount of overlap between the turn-off of one coil and the turning-on of the next coil I could do this. The overlaps makes this much more difficult to achieve electronically I think.

The above is more to show what I think are the timing considerations in having a fully tuned setup. I think the setup above could be a few months into the future. I think careful winding of coils to make as near as identical as possible will alleviate the need for per coil tuning. The above circuit will come into its own once we have a working proof of concept as it will allow quickly wound, non-identical coils to be used, in replication attempts.

I think problems with replication (e.g. Otto et al) are down to timing differences due to slightly dissimilar coils. GK's precise measuring of wire length, placements of coils, etc. could produce some interesting results assuming of course that Otto's results don't require slightly different coils in order to achieve the correct timing!

Cheers, Bob.

[Earl]

Hi Bob,

in answer to your above posts, please see

http://www.overunity.com/index.php/topic,2582.msg37117.html#msg37117

hehehe I like your rhyme.

Regards, Earl

[bob.rennips]

Hi Bob,

in answer to your above posts, please see

http://www.overunity.com/index.php/topic,2582.msg37117.html#msg37117

hehehe I like your rhyme.

Regards, Earl

Very nice! Thanks Earl, much appreciated.

[Earl]

Hi Bob,

here is the further evolution of my schematic, see

http://www.overunity.com/index.php/topic,2582.msg37124.html#msg37124

regards, Earl

[Earl]

Hi Bob,

I would suggest limiting the adjustment range of the firing point by not using a C, only a low value 10-turn poti.  Too much adjustment range may get you lost.

Another question that pops into mind is when the beast finally starts putting out serious juice, whether to scale up physically or, for example, use 8 coils instead of 3 or 4.

I will be generating more schematics concerning 3 and 4 phase generation using a shift register.  The advantage of a SR is that there are no propagation delays from stage to stage, all stages are clocked simultaneously, even at 30 MHz.

Regards, Earl