Hilden-Brand Magnet Motor

[MeggerMan]

Hi Igor,
The simulation results for Vanadium Permedur came out negative, in that I could not get any flux excess for the valve.
I will post the graph showing the current and flux for each case (On/Off/Steel core/Air Core) so you can decide.
At the moment I think M-47 Silicon Steel is winning the race for the best material for a switch.

Hi JackH,

Thanks for the update on the construction ideas.
Are you now using 2" disk magnets in your latest motor?
How many magnets for each valve?

I have been told that there is a way to get the valve to work without any steel at all, just using coils and magnets (air core). I will do some simulations to test this out.


Regards

Rob

[gyulasun]

I have been told that there is a way to get the valve to work without any steel at all, just using coils and magnets (air core). I will do some simulations to test this out.
Regards,
Rob

Hi Rob,

Unless it is proprietary, would you describe how it is thought? Simply omit the iron jacket from the magnet? Very curious to learn 

Thanks
Gyula

[MeggerMan]

Hi JackH,
Yes, an air core was a daft idea,simulation show it could not possibly work as a switch.

OK back to steel choices, the best so far now is US Steel type 2 0.018" thick.
The results for this steel is amazing, an overall flux difference of 468mT with a coil current of 12mA.
Here is the graph showing the results for the On/Off and steel + air cores for comparison.
Notice how the flux for the steel core takes a lot more current to get going, but the magnet seems to kick the flux into life right away.



Y axis = average flux density in outer leg in Tesla
X axis = coil current (2000 turns) in mA
BDiff (T)Ã,  = Mag On - Mag Off - Steel Core

The BDiff is to show the difference between the valve "on" state and the valve "off" state less the flux you would get from the same "On" current through a solid core of steel.
All measurements are taken as an average cross section flux in the centre of the outer leg.

See attach rar file that contains all the metals I have tested together with the Femm file plus the enhanced lua script to allow you to test a range of coil currents from 1mA to 31mA.
Nearly all the graphs peak at about 10mA anyway.

Regards

Rob

[dingbat]

Rob,

Could you please explain the graph in more detail?

I can see that the horizontal direction is increasing current (in the coil, I assume).
The vertical is Tesla

The "Bn Diff" appears to be the difference between the "PM On" and "Air" perhaps?

Is the "Air" graph flux vs current with the coil only? (no magnet, no steel jacket?)

Is the "Steel" graph flux vs current with the coil and steel jacket?

I assume that PM On is the complete valve - magnet, steel jacket, coil?

What is the PM off graph?

Where is the flux value taken?

(Perhaps if you referenced what diagram the graph refers to.)

Sorry for the seemingly dumb questions, but I would like to fully understand what your graph is showing.

[dingbat]

i would also like to see what will happen if you put some other magnetic disturbances in the circuit.  for example place another magnet near the steel somewhere to see what happens.  i want to see what any opposing or assisting fields do to the system.  when you place a secondary coil on your device, it will create its own fields when current flows.

perhaps by placing a small magnet near where you would put an output coil you can see what the opposing field will do to the device.

i presume that adding a magnet anywhere in the system will modify the action of the valve thing.  this will give some idea of how the valve will work when power is drawn from a secondary coil.

will a magnet that tends to assist the valve flux cause the valve off state to have more flux?  will a magnet that tends to oppose the valve flux cause the valve on state to have less flux?  these are important issues because other magnetic fields will occur when you apply the valve to any non-static situation