New member: A Newman motor replicator.

[Michelinho]

Hi all,

I will try to address a few posts that I did not respond to or did not answer  at the time.

kahbe

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 Huh  and 0.25" shaft !!!

The neodynium are very powerful magnets but I did not have any at the time that would fit my design.
Yes the rotor needs to be balanced and to a few gr. I made a jig with 2 parallel rails and from there achieved a good balance.
The plywood is used in the construction of the frame, the rotor has a 1/4" shaft with a ferrous coupler to which the magnets are glued. The magnets have no chance of coming off in normal use. When I made the video, I protected from fly off.

Careica

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.

As you raise the voltage, the coil will produce a stronger magnetic field and the bemf will get very strong. Protect your coil to prevent a burn through (High BEMF that jumps in the coil and burns through wire insulation). Also try inserting a cap between your coil terminals, that will tame your bemf and give you additional rpm. You can also recover them a la John Bedini, his recovery circuit is easy to add.

Take care,

Michel

[Careica]

Hi all,

I will try to address a few posts that I did not respond to or did not answer  at the time.

kahbe
The neodynium are very powerful magnets but I did not have any at the time that would fit my design.
Yes the rotor needs to be balanced and to a few gr. I made a jig with 2 parallel rails and from there achieved a good balance.
The plywood is used in the construction of the frame, the rotor has a 1/4" shaft with a ferrous coupler to which the magnets are glued. The magnets have no chance of coming off in normal use. When I made the video, I protected from fly off.

Careica
As you raise the voltage, the coil will produce a stronger magnetic field and the bemf will get very strong. Protect your coil to prevent a burn through (High BEMF that jumps in the coil and burns through wire insulation). Also try inserting a cap between your coil terminals, that will tame your bemf and give you additional rpm. You can also recover them a la John Bedini, his recovery circuit is easy to add.

Take care,

Michel

Ok. How do I protect my coil from burning while hight BEMF spices? 

[Michelinho]

Hi Careica,

You can do it many ways. Neon bulb, capacitors and diodes are used. Check a few of RayOenergy videos, he shows how it is done. I leave my son-in-law do the electronic part, I just tell him what I need to do and he mix in how to best do it, sometimes with the only parts we have handy.

I use a spark gap http://czshengshi.manufacturer.globalsources.com/si/6008810216674/pdtl/Surge-protector/1003159320/2-electrode-Switching-Spark-Gap.htm and a 4uf 220vac capacitor in parallel across the coil or coils in series.

[Michelinho]

Hi all,

I miss this post...

The power supply has been checked fixed and improved.

The little Newman V1.0 went through hell... 

J'ai fait des tests sur ton petit newman et mont? jusqu? 130v et jusqu'? 130 mA.

It was signing under 130v and upto 130ma, high rate of spin. Though little critter.

Take care all,

Michel

[Michelinho]

Hi all,

I started to build the alternator for the Newman motor V2.0. I simplified the design as time is getting short and my back keeps me from working for extended periods. I am also building a few prototypes of the Nathan Stubblefield cells so I may not have much time to roam the forum but I will still monitor a few times a day for questions or suggestions. 

The final design is set and the rotors and stator are done with the exception of the coils. It is a dual rotors with 16 magnets ( 1 1/2" X 1" X 1/4" neo) on each and with the stator in 2 parts that I will be able to remove and fix if need be without dismantling the whole unit. The stator will slide in from the side and will be held with small aluminum tracks. I am not found of dismantling the rotors fighting with the bunch of magnets and risk injury. My coil winding jig is done and only need to split the magnet wire on two spools before starting.

The 12 coils will be bifilar awg 18 of about 90 turns which should give a nice output at low rpm. I already have my high power diodes and a few heatsinks to hold them, they are the type used in a Delcotron 100 amps. And today, my charge controller Xantrex C60 with the digital display panel came in, that will be used to start and stop the Newman according to the batteries charge.

I am taking pictures as I go along and will document the final kit and as all my kits, they are based on wood so no special machining is needed.

Take care,

Michel