New member: A Newman motor replicator.

[Careica]

Hi everyone,

I finaly decided to join this forum. Why? This look like the best one on Newman Motors replication and testing. I work on these radient energy devices with my son-in-law (water cracking and Bedini motors are what he thinkers with) who handles the electronic side and the testing of our replications. I am a retired diesel mechanic who loves to build unusual things. Earth batteries are in my next experimental projects.

I did my first replication last year and my second one is just done and getting ready to build the axial flux alternator to be coupled to it. I was impressed with the first prototype as it runs at about 6,000 rpm on 18 volts and .025 amp. We ran it on the scope and with a few tweaks, we got near 7,000 rpm out of it. Not much torque but plenty of speed with very nice bemf.

The second replication is much better on torque as the magnets are much stronger on a larger rotor (8 1"x1" cylindrical neodynium N50 on a 9" rotor) and the 2 coils use 41,000 feet bifilar awg 31 with a 5.68 kohm resistance). Turning by hand produces peaks in excess of 180vac so the bemf are violent and will saturate a spark gap easy if no caps is used. With a battery bank producing 108 volts, the motor uses .007 amp and run at about 60 rpm with nice torque. I just bought a power supply that has a range from 0-350v to make it easier to match power supply to coil voltage needs to obtain the 200 rpm needed for the alternator.  I use the Newman commutator with 24 sectors, 12 + and 12 -. This should go to the lab soon for testing.

So, count me in for helping around,

Michel

DAMIT THAT IS BEST MOTOR I HAVE SAW EVER! I have seen many replications but this looking best! I will definetly do my replication like yours. Thank you much! Hope you get your motor run well. And you use same wire gauge as like I ordered (32AWG) Nice one!

[khabe]

Michelinho,
Just because my professional interest - what kind of those playwood setups did  "accelerate to 6,000 rpm without a close loop in the motor" ?
*** Please precise appr. rotor dimensions *** and ***how many turns your "coil" has *** , *** what was used voltage ***
Perhaps we can see this well spinned rotor separately?
Kind regards,
khabe

[Michelinho]

Hi khabe,

Just because my professional interest - what kind of those playwood setups did  "accelerate to 6,000 rpm without a close loop in the motor" ?

The V1 Newman motor I did had this setup:
Motor tested: Joseph Newman
2 coils oval shaped of 2500 tr of awg 32 (non bifilar)
Resistance of the coils: 294 ohms each
2 x 3"round Alnico 5 magnets mounted on a ferrite coupler.
0.25" shaft on ball bearings
Input voltage of 18.7 volts at .025 amp. (Also 2 x 9volts batteries in serie or 1 x 9v would also work fine)

The 2 coils were mounted very close together with the shaft going through the center. I was testing different commutator models and at one time, I left the power supply on while changing one I finished testing. While preparing a different commutator I turned the shaft to try to visualize the firing point and the motor started turning with the - connected to one end of a coil and the + was on the axle like for a tape commutator. The motor took about 30 minutes to go from 300 rpm to about 4,000 to 5,000 rpm. It took about an hour more to reach around 6,000 rpm. The phenomena that produced the acceleration was that a coil strand was very close to the shaft and the bemf pierced the insulation and was arcing on the shaft closing the loop and acting like a commutator with a dirty signal. That promots more and stronger bemf and cause the motor to amplify the effect.

That is why it was reproducible with a small contact on one brush being a small length of awg 32 wire with a contact enhancer (stabilant 22a). I have a video (8 meg) showing the effect that Jean Louis Naudin reviewed but I won't post it on YouTube, if someone wants to have a look, just supply me with a place to send. I didn't know at the time what was causing this enigma. I packed the motor, sent it to my son-in-law that tested the unit for a whole week on the scope and with a few of his brilliant ideas he got another 1,000 just changing the brush to a tiny size and a little bug juice (Stab22a). Tiny dirty contacts arc and act like a pulsed supply.

Thanks Careica. I am lucky to have the funds and tools available for my little project (I still need a lathe  ). I have a lifetime amount of junk and all the time in the world to play with these contraptions.

Take care,

Michel

P.S.: The plywood is Birch Russian made plywood, it is affordable and extremely well made with no air bubles in layers and the layer count is higher making it stiff even in 1/4" thickness. Every piece of wood used is sanded and coated with Varathane Crystal water based Diamond finish (dries in 30 min). Easier to clean and does the wood waterproofing.

[khabe]

Thank you very much for meticulous overview,
What is this you used to measure RPM?
My main interest was how you can get so high RPM when coil has avesome number of turns - awg 32 - its 0.2 mm,   0.032 mm2 of area ... 538 ohm/km.
I use this size wire very often ... but only when stranded 24...240...400 strands and lenght for wire per "coil" seldom exceed 12m .... but not about my motors we are speaking -
- unbelievable kV of yours - 6000 RPM/ 18.7V - means that kV=321 when 2500 turns of 0.2mm wire   Shorts via shaft could explane something but not all ...
Obviously magnetic flux is very weak - does not go deep through windings, why not to use Neodymium magnets - all possible shapes an sizes available?
Design of rotor still unclear    -   3" magnets have very serious weight, it must to be very well balanced ... but all mounted on the plywood disc   and 0.25" shaft !!!
Thats because my serious concern about your own security as well as  life and health all attendees in test room - I hope you have helmets for all crew included witnesses.
Best wishes,
khabe

[Careica]

Thank you very much for meticulous overview,
What is this you used to measure RPM?
My main interest was how you can get so high RPM when coil has avesome number of turns - awg 32 - its 0.2 mm,   0.032 mm2 of area ... 538 ohm/km.
I use this size wire very often ... but only when stranded 24...240...400 strands and lenght for wire per "coil" seldom exceed 12m .... but not about my motors we are speaking -
- unbelievable kV of yours - 6000 RPM/ 18.7V - means that kV=321 when 2500 turns of 0.2mm wire   Shorts via shaft could explane something but not all ...
Obviously magnetic flux is very weak - does not go deep through windings, why not to use Neodymium magnets - all possible shapes an sizes available?
Design of rotor still unclear    -   3" magnets have very serious weight, it must to be very well balanced ... but all mounted on the plywood disc   and 0.25" shaft !!!
Thats because my serious concern about your own security as well as  life and health all attendees in test room - I hope you have helmets for all crew included witnesses.
Best wishes,
khabe

Well, I ordered my 0,2mm 1kg bobin weeks ago, still not comming  But, what I have count, that from 1g of coil I get 3,6meters coil length. Because, site say that in that bobin is 3,6kilometes of coil. I have also couted, that 360 meters of coil give me 197 Ohms. First time, I tought to have 250 Ohms coil BUT I should use as many kilograms coil as possible, to get even better results. So I think to wind first 250 Ohms, try it whit 12V 7Ah Lead-Acid Battery, which should be best voltage when 250 Ohms, then I will double amount of coil and get 500Ohms and doulbe voltages to, put 2x 12V 7Ah L-A Batteries in series = 24V etc. And ofcorse, if I will get that OU, which make batteries recharge themself it could be good.