Muller Dynamo

[aircore]

Hello bolt
   Thank your response.
   I am not negative,
   Nor is it against everyone's enthusiasm.
I just need all the right knowledge and ideas.

[nul-points]

 

Good morning NP!,
[...]
Some gifted scientists have the ability with words to express these ideas adequately.  You are one of these folk and I thank you profusely.  I have the gift to see in pictures and by visualization what is going on and the tenacity of a bull dog when I come to solving these problems but find it hard to express these ideas and concepts in words as you do.  Thank you again for this excellent logical analysis!

Now to get to work,

Respectfully
Ben K4ZEP

thank you for your kind words Ben - i know some folks around here who'll be laughing in their boots to see those words applied to me!

however, that's not going to stop me printing them out,  displaying them in an expensive-looking frame and hanging them under a bright spotlight in full view for visitors, as they come through my door 

seriously, your quality of work and careful investigation deserve full recognition, and i for one am very grateful that we have members of your calibre (technically and personally) on the case!


i've made some good progress in securing my DC motor and i've done a test spin-up with the lower stator in place, fully populated with cores and mags

rotor to core gap is probably too wide at the moment (9mm approx) , but taking on board your comments about a stable platform, i realise that i need to replace my nylon studding with threaded brass rods before i try balancing 'good o/p' versus 'less lugging' - way too much flex in the platform at the moment

spin-up is relatively smooth (although some interesting noises at different rpms on the way up!)

i was interested to see that if i add the upper stator (with cores, but no mags) in place during spin-up from stop, the rotor barely gets going - but if i let the rotor get some speed up and then bring the upper stator into position, the rotor manages to keep the rpms climbing to its steady-state rpm

so the core lugging (without stator Neos) seems to have less effect at higher rpm

when i've soldered up one or two FWBR mini-boards, i want to try out your 'series looped' experiment with my test coils and see if i can get 'boost' from a lower level drive with my DC motor

then it's off down the hard road of coil winding - we sure know how to have fun 

keep it rolling Ben!
np


http://docsfreelunch.blogspot.com

[energia9]

i thought its time to post this, i did a simple experiment last year and i redid the experiment,  so here it is:

1. i connected a 9v battery toa small dc motor
2. I put a magnet on a sweet spot on a dc motor, then i saw speed up
3. i put another magnet and i saw an even increase in speed,  3rd magnet will not work, so for three stators= 2 magnets
4. I glued two dc motors shaft together
5. i put magnets on the output dc motor
6. The output was 3 times as big as without magnets,   note there are no magnets on the input motor

i think this mystery has just been solved .

[k4zep]

thank you for your kind words Ben - i know some folks around here who'll be laughing in their boots to see those words applied to me!

however, that's not going to stop me printing them out,  displaying them in an expensive-looking frame and hanging them under a bright spotlight in full view for visitors, as they come through my door 

seriously, your quality of work and careful investigation deserve full recognition, and i for one am very grateful that we have members of your calibre (technically and personally) on the case!


i've made some good progress in securing my DC motor and i've done a test spin-up with the lower stator in place, fully populated with cores and mags

rotor to core gap is probably too wide at the moment (9mm approx) , but taking on board your comments about a stable platform, i realise that i need to replace my nylon studding with threaded brass rods before i try balancing 'good o/p' versus 'less lugging' - way too much flex in the platform at the moment

spin-up is relatively smooth (although some interesting noises at different rpms on the way up!)

i was interested to see that if i add the upper stator (with cores, but no mags) in place during spin-up from stop, the rotor barely gets going - but if i let the rotor get some speed up and then bring the upper stator into position, the rotor manages to keep the rpms climbing to its steady-state rpm

so the core lugging (without stator Neos) seems to have less effect at higher rpm

when i've soldered up one or two FWBR mini-boards, i want to try out your 'series looped' experiment with my test coils and see if i can get 'boost' from a lower level drive with my DC motor

then it's off down the hard road of coil winding - we sure know how to have fun 

keep it rolling Ben!
np


http://docsfreelunch.blogspot.com

Hi NP,

Lets both keep trucking.  Working on my motor today, just did a test to be sure there was no Variable power supply artifact in the Gen. series loop, THERE IS NOT a problem with the power supply.  Replaced it with a 13.2VDC VDC Lead Acid battery,   As rotor not rotating as fast as at 14VDC and other cores added, slowing rotor down, output of the Gen was 3.2VDC and voltage presented to the motor was then
16.4VDC and steady.  Current on a ANALOG Triplet meter was 68ma in motor/Gen/Battery loop. Then put a 68000uF cap across Variable power supply, same results.  The Gen is a SOURCE. Nuf said.

On another subject.  Looked at the 6 gen cores with scope, I am disgusted with the difference in outputs of each coil. vs. the other pair coil and differences between coil pairs!. Winding "till full" does not work with any percision.   A lot of work needs to be done to MATCH the gen coils at a calibrated distance, and then the mounts,  to make this truly a balanced device.  A lot of work here coming up with shims, etc.  Lordy.......Should have built a test rig and calibrated all coils before mounting!  That is, standard sine wave from another coil/sig. generator, starndard XX mA. load, standard distance.......arrrrrrrrrr......holy cow batman, thats a lot of work.  Then the rotor and the mounts/mount needs to be adjustable enough to
dial this thing in on each coil!

Have looked at the resonance factor and don't have a handle on it yet.  There is a resonance but in my unit, it is at least the third harmonic above my rotor frequency @ 2K RPM.  Lots more to look at here too.


a lot of work here coming up with shims, etc.  Lordy.......

Ben K4ZEP

[neptune]

@K4zep . Man I take my hat off to you . You are , in the nicest possible way , like a dog with a bone . Techniques have been discussed on these threads to match resonant frequencies of coils . My suggestion was to build each coil in turn into a simple Radio Frequency oscillator , and check the frequency on a radio receiver or frequency counter . But you have scope and no doubt will use your own methods . The actual frequency is not vital so long as it is the same for all coils . Check all coils and pick the one with the highest frequency .remove turns from the other coils untill they come up to frequency . I just KNOW you are going to crack this , Keep on trucking .