ZFM Advanced Explorations Part II

[Yaro1776]

Greetings to all the wanderers of the aether,
Having concluded the first phase of the next generation ZFM, one can now go forward to the actual design phase of this project. Please bear in mind that this and the following posts of the project progression are essentially a digital form of documentation. There may be areas that are a bit unclear, but do not expect to have every detail to be fully explained – otherwise, where would the challenge and enjoyment be?
There are multiple options too that could be explored for the next YZFM design phase; however a progressive approach has been selected for the sake of simplicity and continuity. In this approach, the ZFM rotor will be expanded to 6 poles with an alternating N-S Neo arrangement. While this does move away from the Bedini method of similar polarity Neo's 180 degrees apart, however it does retain the empty arc segments, thereby creating a virtual coil between each of the other three coil ends similar to the 4 pole ZFM method.
So this build will utilize three coils equally spaced 120 degrees apart with the desired empty space and utilize the same type of build design and overall dimensions as the prior 2016 motor. The plastic pipe type of build is inexpensive, reliable and easily modified. Adapting it to three coils is very easily accomplished.
The coil dimensions will be designed with the results of the prior posts in mind. A short series of experiments were completed the other day that did verify the N-S rotor polarity arc results from the prior posts; however in this instance both coils were energized with an on/off toggle to minimize any overheating. The results of the rotor arc rotation experiments, with two coils in play, are identical to the single coil experiments. That experiment resolves the single versus two coil question.
The initial step will be to wind a bifilar coil with the desired resistance and coil arc, then retrofit it to the existing YZFM motor/body to verify the shortened coil pole arc value. The bifilar wind is intended to be used for the parallel mode of operation and as a comparison to the series mode of operation.
At a future and appropriate time other similar and larger ZFM configurations will be explored and discussed.
It will be a bit of time before the next 6 pole coil experiment post…
Happy Fall

[Joster]

All sounds great Yaro. Following this thread closely!

[Yaro1776]

In the latest set of experiments the 45 degree coil in the standard ZFM and rotor exhibited a 70 degree virtual coil pole arc with the coil radial distance increased by 0.24" over the prior experiment. Not very good, however by decreasing the coil to Neo edge Gap to about 3/16" the virtual poles were then relocated to the desired 60 degree angle. Yes!!!!

So, these several experiments clearly demonstrate that the virtual pole position created by the air coil end can be manipulated by coil dimensioning, coil radial distance and by Neo rotor to coil gap. One could write a very informative technical paper with these experiments...
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[Yaro1776]

Finally completed the coil winding segment of this project and assembled the 6 rotor pole YZFM. Cheating a bit here by using a 4 pole unit with 2 Neo's - pics are below.

The next step is to roughly calibrate the physical location of the coil end arcs to 120 degrees apart, clamp and then to insert the rotor shaft, align and check the internal 2 p0le rotor Neo edges for clearance. Once this is completed, well then starts the tedious part along with the acid test to verify that the coil degree arcs for all three coils are about 60 degrees. Will the hypothesis from the earlier experiments be confirmed?

Next, checking the coil arc in the open space between each coil. Hopefully, the readings with the coil arc's will fall into place. If not, then reboot.

Always a crap shoot when putting together an experimental device for the first time, but then, this is part of the adventure.

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Breathe Responsibly...

[Joster]

looks great Yaro! i apologize if this was mentioned in a earlier thread/post but who suggested the three coil design? Just curious. I suppose this design will produce more torque?

Also, does anyone know (I'm pretty sure it can be) if the ZFM can be switched with trigger coils same way a windows motor runs?

[Yaro1776]

Joster,

The three coil design was a brain cramp on my part as a logical progression of the original 2 coil ZFM. I did not realize that the different Neo config would create the coil pole displacement issue, but that is resolved now.

I have not checked out the trigger coil method, for the initial 6 pole experiments the reed switch method will be used and will move to an optical setup later.

[RS_]

Yaro,

What kind of Bipolar B/C circuit arrangement are you going to use to drive this 3 coil ZFM...? this is Very different than a 2 or 4 coil arrangement...
do you have 3 or 6 magnets on the rotor...?

[RS_]

Joster,

A trigger strand on the coils would most likely work on the ZFM the same as a Window Motor........

[Yaro1776]

Hey RS,

The 3 coil arrangement is a straight progression from the 2 coil ZFM and the rotor is a 6 pole Neo arrangement. Coils have been made without a trigger wire and they are a 45 degree arc design to take into consideration the 15 degree coil end pole displacement due to the N-S Neo setup. A bit weird, true, but the 6 virtual poles that are created are a harmonious 60 degrees apart. Still proofing this aspect and tuning the coil positions slowly. Kind of in "no man's land" here with the virtual poles.

Expect the first 6 pole rotor machining to be completed sometime this month. Before that I will spin the motor with a 2 pole N-S rotor arrangement just to see how the machine works.

Down the road the bigger 4 coil ZFM is next on the list with a bit of Ron Cole's work thrown in for diversion. The 4 coiler is certainly a more costly and complicated project.

[Yaro1776]

Hello to all,

Prolonged tweaking and calibration of the the 6 pole ZFM motor has resulted in the virtual pole positions to be all very close to the desired 60 degree arc angle. So all the preliminary experiments have been verified in that all three of the 45 degree coils mounted in the motor body have produced 6 virtual poles that are very close to 60 degrees apart. Very cool to work this progression from concept to actuality.

Experimental results have shown that the Neo positions and configuration do impact the magnetic pole field interaction with the coil end poles. A N-N Neo configuration is different from a N-S at least for the 2 pole experiments. A series of 2 pole experiments were conducted about a year and a half ago with N-S Neo config and 90 degree coils. These experiments yielded some unusual results which can now be mostly attributed to the expanded arc of the virtual poles. Who knew...

Moving on, the initial design for this 6 pole rotor called for 2"Lx1"Wx1/2"T N52 Neo's. The physical constraints of the motor body yielded a 6 pole rotor where the edges of the Neo's were separated by only a 0.060" clearance. Hmm...

A quick experiment with two 1" square Neo's on a flat surface, N face up, demonstrated that they are attracted. However, flipping one Neo to S face up, while leaving one N face up, resulted in a very strong repelling force - very difficult to bring the faces together for 0.060" separation. The larger Neo's have more than twice the repelling force - no way can they be easily mounted on an aluminum rotor - on an iron rotor, maybe.

So plan B is to use 2"Lx1/2"Wx1/2"T Neo's as a preliminary configuration. See what happens in the near future when the parts machining is completed.

The adventure and challenges continue...