Hilden-Brand Magnet Motor

[Light]

hartiberlin
"Where is the magnet and what are the black quaders ? Are these the iron cores ?
- Magnet is inside of the coil, in steel bushing. "Black quaders" are steel flatbars. Mild steel core.

"Do you have inside the blue coils an iron cylinder where a Neodym magnet resides ? What exactly kind of magnet ?
- Yes, mild steel bushing. Don't know, it's not ceramic (not black), not Neodium (not THAT strong), AlNiCo, probably; od3/4x3/4".

"How big and how strong and how much voltage and current do you need to switch it on ?
- 12V@3-4A (battery charger). Actually it works from 9V bat, but torque (rpm) is  low.

"How did you manage to demagnetize it ? At which voltage and which current levels ?
- The same pulses but backwards (against magnet flux). It lost magnetism dramatically, can't hold a bolt...But now it seems it's getting stronger...Strange...

"How many windings do your coils have ?
- Gage 24, around 200 wind-s.

"Maybe try a different browser, IE 6.x SP1
- Where can I get it and why I do not have any problems with other sites? Mystery...

"Maybe user Light could just test this with just one valve and one
output coil
- I'll try...

Will keep in touch...

Liberty.  Yes, it's interesting, but I thought regarding this model you can express you idea in drawing ("Now try to put a coil where the rotor magnets are for a solid state generator "). Thank you anyway.

[Liberty]

Light,

As far as using one valve, you could just put the core of the coil across each pole of the valve to see if it will pulse.  But you might want to check your valve and adjust it the way that Jack said:  He tests how much weight the magnet will pick up, then takes the shell with the coil (without the magnet inside) and sets the power on the coil to the same strength of picking up the weight as the magnet did.

Hopefully those pictures were helpful for something to consider.  Just some thoughts to kick around.  Good luck on your experiments.  I am continuing to developing the magnet motor that I made and am too wrapped up in it to try the other things with you, but I like to follow developments and experiments that are on this thread.  Hopefully you will get your set up to work like you want it to.  Have fun.

[hartiberlin]

hartiberlin
- Yes, mild steel bushing. Don't know, it's not ceramic (not black), not Neodium (not THAT strong), AlNiCo, probably; od3/4x3/4".

Hi Light, many thanks for the infos.
Ohh, I see, AlNiCo, well these are especially bad for these purposes,
cause they demagnetize fast, as they don?t have a high Coercitive-force.
So -Hc is very low and so they demagnetize very fast, when you
apply a reverse field.
So better use strong Neodym magnets for this case.
Many thanks.

[hartiberlin]

@Rob,
how did you come up with the 50 mA and 4 Volts ?
Could this somehow seen from the simulation
or did you already actually build this thing ?
( I have not yet worked with coils in FEMM, just with magnets)

[MeggerMan]

Hi Stefan,
See attached file.
Femm allows you to specify a material called 0.2mm wire in a circuit.
You specify the number of turns as +ve or -ve indicating the turns direction (into the paper or out).
You can also specify the current for the wire, it works out the volts drop and tells you in the circuit info.
One of the preferences is the depth of the whole simulation, I set this to 1 inch (25mm).
If you increase the depth, the volts drop goes up and so does the power used.
This is the depth of the core itself, but I think it may not take into account the distance between the two halfs of the coil you draw.
If you increase the distance between the two coil blocks the program does not know they are part of the same coil.
So in reality the power used will most likely be double. ie. 0.4 watts

Regards

Rob