Circuit setups for pulse motors

[Ren]

I was hoping (or hopping?) that bi or not to bi was...you know..... about females LOL.

Awesome stuff toadie, looking forward to immersing myself within this next page of juicy info.

Oh, and about the hard drive, it seems to be charging these lead acid car batteries quite well. Amazing considering the coil is tiny, well the whole thing is tiny! I think I'll pull the big motor apart and make a small speed demon with four coils. ! I'll have a go at wiring up according to figure 19 on the new page, it looks very promising!

[hoptoad]

Oh, and about the hard drive, it seems to be charging these lead acid car batteries quite well. Amazing considering the coil is tiny, well the whole thing is tiny! I think I'll pull the big motor apart and make a small speed demon with four coils. ! I'll have a go at wiring up according to figure 19 on the new page, it looks very promising!

Hi Ren.
Sounds like your having fun. Transfer those electrons - yeh 
Just a little word about safety. I don't want to read about you losing an eye., , If you decide to build some little "guts" machines, with relatively small diameter rotors and low impedance coils and neos, then you should consider taking the time to make planar rotors if you're not already using them.

With low impedance coils, speeds can be astounding! The centrifigal force on your magnets in a radial layout makes them prone to flying off the rotor at very high speeds if they have the slightest weakness in their binding method. They can be lethal as a bullet. I will talk about this issue at some stage in conjunction with optical switching control (far more accurate).

Cheers all, happy pulsing, motorists 

[tropes]

Hi Hoptoad
Thanks for the info on bifilar coils. Is it practical to use a bifilar coil for both pulsing and collecting as in Cuicuit # 3 at http://www.theowlnest.com/circuit.html ? I have not yet decided how to set up my Sotropa motor to most efficiently collect "flyback voltage" or induced EMF and would like more information before making that decision.
Tropes

[casman1969]

I'ts been awhile since I posted but..,
Pulse motor cores do make a difference and here's one to try...
Go ahead and use the standard bolts but cut the head off and adjust it in and out for desired cogging.
My setup is a 20" aluminum disk wheel with 8- 2 X 1 X 1/2" N50 neos all N facing out (well, it could be South). Coils are 20 AWG bifilar wound in the Adams fashiion but absolutely no twists. Took me several days to wind each coil.
single winding resistance is 5.2 ohms and I combine the two for a total of 10.4 ohms. Running two of these coils at 120 and 240 degrees with my smaller (28 awg) coils in the appropriately timed position of 0 degrees ( actually just off for timing) for my trigger. Also wound one 7lb spool of 18 Awg for my pickup coil.
Might be nothing but this setup has been running for 4 hrs and my battery voltage has been very stable at 12.69 V. Pulling a little over 100 ma and using the Bedini SSG single transistor ckt to capture my BEMF.
I'll let this run overnight...

Carl

[Ren]

Thanks for the safety tips hoptoad. The neos are aryldited (?) between two hard drive platters. They seem pretty safe but maybe I'll put a little shield up and a bit more glue. What do you mean by planar rotors? The next model I might have the coils ontop of the rotor instead of around the sides. I think this would make securing the magnets easier, or more secure. I might embedd them in resin too.

Ive seen some good ones made out of old reel to reels and computer fans too, maybe thats the way to go in the future.

This way the coils will be closer to the magnets face, more uniform.

@ casman, welcome. Good to meet another experimenter. Good luck with your tests.