MylowHJ Replication - Discussion

[wattsup]

@Omega_0

Yep, thanks for these magnet graphics. You can see the 6 rotors are forming a crown although I don't think the software thinks of it is such a away. Then the stator riding on top. Really neat. I just don't know how reliable this would be to do preliminary computer simulations before considering a rotor placement strategy, but it is nice to see this in graphic form.

@robbie47

Thanks for your suggestions of rotor mag clips. I will look for these clip you talk about. as for placing neos under the bar magnets, I was thinking of this also but realize the bar magnets will have much less ability to hold in place through a 1/4" thick alu disk, compared to the three noes stacks I have held by one neo underneath. But of course I will try it when I get my bar magnets. Also I wold like the bar magnets test to be as equal to Mylows as possible so adding magnets underneath may skew the results.

[nyctuber]

Some vizimag captures ...

According to Howard Johnson, the images do not show the proper magnetic field around the magnets due to iron filings becoming tiny magnets (I assume the program is based on that) He seems to have proved the theory with his shaded pole magnetic gate. I'm not sure though.

[Omega_0]

robbie47,
Found anything interesting ?
Vizimag is not free, but produces pretty pictures. Free trial is here btw : http://www.vizimag.com/vizimagtr318.zip

nyctuber,
Thats right, I also don't think there are any simulators that model HJ's version of fields. If you see his plots, the fields of a bar magnet do look like two 'conventional' magnets one on top of the other, with asymmetrical fields. I will try to picture this in vizimag or FEMM, just to see...

wattsup,
I forgot to say that the one with 6 rotors has a iron permeability plate below it. Alu has a permeability of 1 (same as air), so the pic doesn't really depict the real situation (I was just playing with that s/w).
I'm also trying different arrangements by sticking the rotors with Alu plate in between, it may affect things a little bit, but in my experience both glued and doubled rotor versions basically produce the same effect (i.e. fail !)

Now we should note that Mylow's design is non-working and we all are back to the drawing board. Exact replica of his design will produce an exact fail...

[Omega_0]

So here are some simulations of simulation of HJ version of fields.
One can approximate the field of an HJ magnet using two conventional magnets in repulsion mode.
HJ-Simple : Shows just two such magnets, all vortexes are equal.
HJ-Approx1: Shows what an offset can do, getting closer.
HJ-Approx2: Shows that thin magnets look better.
HJ-Approx3: Shows that a slightly tapered cross section will more accurately render an HJ field.

If these two magnets are used as one in the simulation s/w, we can have the HJ effect and it may produce some interesting results (like OU for example )

However, these are just my ideas nothing concrete here. Hope they will be useful for some.

[markdansie]

Have a look at the last photo

http://touko.cjb.net/mylow/