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Author Topic: The Halbach Array Meets the Tri-Force Roller.  (Read 19491 times)

CLaNZeR

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The Halbach Array Meets the Tri-Force Roller.
« on: March 21, 2008, 06:49:51 PM »
Made a few Halbach Arrays today and thought I would try them with a Tri-Force Roller.

(http://www.overunity.org.uk/halbach/clanzhal.jpg)

(http://www.overunity.org.uk/halbach/clanzhal3.jpg)

(http://www.matchrockets.com/images/halbach.jpg)

(http://www.matchrockets.com/images/halbachflux.jpg)

Here is a Video to show what happened:

Hi Res Version:
http://www.overunity.org.uk/halbach/CLaNZeRHalbachExperiments1.wmv

YouTube:
http://www.youtube.com/watch?v=1Zj95iyANYc

Cheers

Sean.
« Last Edit: March 21, 2008, 07:35:17 PM by CLaNZeR »

Omnibus

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #1 on: March 21, 2008, 07:38:17 PM »
@CLaNZeR,

Great work, mate, as always. Waiting to see that crucial experiment with the rotor and this arrangement as stator. That nasty initial barrier, prior to the point you place the roller is the culprit. If this helps to overcome it that'll be it. Recall there were suggestions that Halbach array was at the basis of Steorn's contraption. Good luck.

FreeEnergy

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #2 on: March 21, 2008, 07:49:14 PM »
wow! very nice!  :o

ramset

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #3 on: March 21, 2008, 07:50:33 PM »
COOL STUFF good luck/experimenting    Chet

FreeEnergy

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #4 on: March 21, 2008, 08:07:32 PM »
This may sound dumb but could you tell me how exactly The Halbach Array works? Do i just use magnetic cubes with the north and south facing different directions? do they have to forcefully be held together like they way you have it?   

CLaNZeR

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #5 on: March 21, 2008, 08:34:33 PM »
This may sound dumb but could you tell me how exactly The Halbach Array works? Do i just use magnetic cubes with the north and south facing different directions? do they have to forcefully be held together like they way you have it?   

I placed the North pole faces the way the arrows were pointing.

It is a bit tricky holding each magnet as you put them in place as they will try and right themselves.
But a bit of wood with a 1/4 inch slot should work fine.

Cheers

Sean.

CLaNZeR

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #6 on: March 21, 2008, 08:35:53 PM »
Hi Omni

Yep the Sticky Spot still there on the entrance, but seems a bit weaker.
Will make up a few more and try the Rotor.

Cheers

Sean.

@CLaNZeR,

Great work, mate, as always. Waiting to see that crucial experiment with the rotor and this arrangement as stator. That nasty initial barrier, prior to the point you place the roller is the culprit. If this helps to overcome it that'll be it. Recall there were suggestions that Halbach array was at the basis of Steorn's contraption. Good luck.

CLaNZeR

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #7 on: March 21, 2008, 08:49:04 PM »
Just had another thought about making bigger lengths as picture below.

(http://www.overunity.org.uk/halbach/clanzhal4.jpg)

As we know, when ever we close the loop on any magnets, including the Tri-Force Gates, they cancel the field force out as no gaps. With this setup will it do the same?

ummm


CLaNZeR

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #8 on: March 21, 2008, 09:15:45 PM »
Decided to make some longer lengths first, so just ordered 80 * 1/4inch cubes and I will make a couple of long lengths that should come out at just 200mm.
It will be interesting too see if it performs as good as the Tri-Force gate on longer lengths.

(http://www.overunity.org.uk/halbach/clanzhal5.jpg)

Will update thread when they arrive.

Cheers

Sean.

Aka

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #9 on: March 22, 2008, 12:24:18 AM »
Hi everyone I have been lurking about for a while (few months) reading the magnet motor posts and like what you are doing :) I thought it was time I signed up and contributed in some way

@CLaNZeR have you tried taking one array and using it in the normal trigate setup as the "roller" but limiting its movement so it doesn't roll and fixing the strong point so it is either infront or behind as it enters and leaves the gates... what I'm thinking is it may be possible to restrict the attraction as it exits and/or help with the sticky point on the next gate... or it could just create a larger sticky spot which is most likely to happen as normally happens

my magnet selection is limited to cylinder and flat neo's so its really hard for me to test this without buying some cubes :( but I guess they are the next ones to buy for my collection

CLaNZeR

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #10 on: March 22, 2008, 11:52:32 AM »
@CLaNZeR have you tried taking one array and using it in the normal trigate setup as the "roller" but limiting its movement so it doesn't roll and fixing the strong point so it is either infront or behind as it enters and leaves the gates... what I'm thinking is it may be possible to restrict the attraction as it exits and/or help with the sticky point on the next gate... or it could just create a larger sticky spot which is most likely to happen as normally happens

Hi AKA

Good idea and have thought of trying this later.

The Halbach Array certainly has a weird setup, if I run a small magnet over it and mark the poles it comes out as the picture below.

(http://www.overunity.org.uk/halbach/clanzhal6.jpg)

Will let you know how it goes.

Cheers

Sean.

Ray_T

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #11 on: March 24, 2008, 12:33:49 AM »
Just noticed this topic and thought I'd add what I found with the tri gate (if you hadn't found it out yet yourself).  Hopefully it will help with testing and shed some further light on tri effect.

Found that stacking tri gates width wise, instead of linear, increases that thrust, so more roll away.
Just keep adding magnets till you get to the final tri gate---continue the same polarity pattern though or it won't work.

Picture attached, hope this helps and thanks for sharing your results

BEP

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #12 on: March 24, 2008, 02:39:00 AM »
As we know, when ever we close the loop on any magnets, including the Tri-Force Gates, they cancel the field force out as no gaps. With this setup will it do the same?

ummm

@CLanZer

If you maintain the polarity sequence there should be no cancellation of flux when you build it into a ring. This is true when running a Halbach ring of coils and in Nasa reports on magnetic bearings. When you close the ring the active side should show much more focus.

I've done it with sequentially aligned coils but not with PMs.

Bep

BEP

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #13 on: March 25, 2008, 03:09:46 AM »
Hmmmm....

Sorry 'bout that ClaNZer.

I keep forgetting when I post a comment the thread generally goes to the bottom. I don't know why. My bath isn't due for another 27 days  ;D

Good luck trying to make a motor out of it. I failed. But I couldn't afford the magnets. I just used cores from old AB 700N relays (have access to a never ending pile of switchgear parts). It was probably the gap created by the winding that did me in.
The movement in your vid reminds me of lateral 3-phase electrostatic induction motors.

Other than that - this finding of yours seems very promising! I hope to see a vid of your Halbach array rotor between two tri-force ring stators.

CLaNZeR

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Re: The Halbach Array Meets the Tri-Force Roller.
« Reply #14 on: March 29, 2008, 12:41:28 AM »
Will try find time to catch up on comments tomorrow.

But for now Part 2

Hi-Res video as usual

http://www.overunity.org.uk/halbach/CLaNZeRHalbachExperiments2.wmv

YouTube:
http://www.youtube.com/watch?v=Wm9hDV80rNQ

Sorry if I have not had time to catch up on the forums posts, been a busy week at work :(

Cheers

Sean.