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Overunity Machines Forum



3D printing a structure for an experiment with magnets

Started by Low-Q, September 02, 2016, 10:41:31 AM

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0 Members and 2 Guests are viewing this topic.

Low-Q

I have bought 11 ballbearings. 2x3pcs for the outer magnets, 2pcs for the inner rotor, and 3pcs that will roll on the circumference of the outer rotor. This rolling bearings are needed in order to have "free sight" for the rods, so they don't collide with any other structure.


I need to make new rotors to fit the ball bearings.



To be continued...


Vidar

Low-Q


I have been thinking on a way to eliminate the countertorque that the three outer magnets apply. Not using rods, but another method. A method that I cannot in my wildest imagination think will cause any counter torque. It's hard to explain with words - in an educational way. When the device is finished, regardless if it works or not (It will probably not, but anyways), I will explain with a video, so you don't need to make the same possible mistake as I do right now (still sceptic... :o 


What I do know, is that the method does not violate any law.
The method might be used in several other styles of failed magnet motor attemts - well if the method works. We'll see about that.

So now I am printing parts for the project - hopefully more rigid this time :D

No matter what I have missed out, overlooked etc. I will finish this project :)

Vidar

Low-Q

I made a video, consisting of a crappy english and poor sound, so listen carefully ;D


The video is from my garage (with lots of crap in it). I demonstrate how I have chosen to eliminate counter torque from the three magnets on the outer rotor.
As explained earlier, the three outer magnets wants to rotate in the same direction as the outer rotor does. To prevent this, these three magnets has to be forced back with gears attached to the outer rotor, for example. The torque in those magnets will therfor add up to the countertorque that already exists in the outer rotor.


The already existent torque in the inner and outer rotor are the same and opposite, but the gear ratio of 2:3 I assume will make the difference in energy output from nill to 150% efficiency....yeah, right!


So I made a "torque controller" that is fixed via a ball bearing and a 8mm bolt.
This torque controller is eliminating the torque caused by the three outer magnets without energy input. Proven by this experiment.
I guess the output energy will drop accordingly - the elimination of the counter torque must come from somewhere. So I have no expectation that this device will work when finished. But it will be finished.


Anyways, here is the video of the concept of controlling couter torque:
https://youtu.be/aoA6D3_lIzM


Vidar

Low-Q

This project is still on going. I stumbled upon a challenge with the housings for those outer rotor magnets, but that is solved now, and the productin of these holders are going on. Engineering is sometimes a challenge when you start from scratch like this :)


The reason why I build this device is because I cannot find any good reason why it can't work - still, I do "know" that over unity is not possible.
The only thing I can think of, is that simulations in FEMM 4.2 cannot "understand" that the outer rotor magnets have a magnetic field that is locked in one direction all the time.
I tried to connect each magnet with a non magnetic solid material (copper) in FEMM, but the torque readings are still the same. So I assume that FEMM is still calculating the individual torque even if they in practice cannot spin around its own axis. There are no ball-bearing option in FEMM that prevent the magnets from providing torque to the outer rotor. I think that FEMM assumes that the magnets are fixed to the outer rotor, and therfor wants to rotate the magnetic field accordingly. FEMM probably wants the inner and outer rotor to find equilibrium - the sticky spot, and stop there.


If anyone have thougts about this, please let me know.


Vidar

Low-Q

So. The project is finished and tested. It is pretty wobbely and unstable due to the powerful magnets, plastic parts, and 8-10mm thread bolts that is wobbeling in the ball bearings (The diameter of this bolts is little less than 8 and 10mm. It is possible to turn the rotors with relatively little effort.


This is what I have learned.


FEMM is a tricky software if you want correct results, but it is possible to do the simulation right - given that you know how to do it...I didn't.
What I did wrong in FEMM was a couple of things:
I measured torque. This is useful in most cases. However, my design consisting of 3 independent outer magnets around center will cause FEMM to calculate torque correctly, but FEMM also consider that each individual magnet have its own torque that goes in the opposite way of the desired rotation. This torque is added to the outer rotors torque around center (0,0). For example -15Nm + 5Nm= -10Nm (Clockwise)
Since my outer magnets is held back by what I called the "torque controller", their torque is removed, and total torque of the outer rotor increase to -15Nm.
So I went back to the FEMM simulation and started a time consuming calculation of torque, that is based on X,Y force and vectors. Calculating torque this way will eliminate the individual torque in the magnets. The result of the total torque increased by 50%, from -10Nm to -15Nm.


I tried to link the outer magnets with a non magnetic solid material in FEMM, but that does not make sense to FEMM, because FEMM expect that the magnetic field will follow the rotation when I measure torque instead of X,Y forces at different angels.


The inner rotormagnets in the simulation is physically linked together, and torque measurements will be correct and as expected. Because the magnetic field is following the rotation, as intended. For example 10Nm measurements here versus -15Nm at the outer rotor. Multiplying with the gear ratio of 2:3, this whole thing just won't run.


Since I had a doubt wether FEMM did the simulation as I wanted it to do or not, I built the device to confirm the outcome.
I have spent about $70 on this project, but now I have ball bearings and stainless steel bolts for use in more productive experiments :D


I share my findings even if this was no success, so you don't need to spend time doing the same mistake as I did.


Cheers


Vidar