Hilden-Brand Magnet Motor

[MeggerMan]

Hi Dingbat,
See amendments to my last post.
I did re-run the simulation with additional coils on the output limbs as you have suggested and it appears to allow the input current from 11mA for peak excess flux to 30ma for peak excess flux and the output current to be 120% to 160% of the input current. (2 x output coil at 60% of current in the input coil)


Y axis = flux density of outer leg in Teslas
X axis = input coil current 10's mA ie 3 = 30mA


The input at 30mA for one coil and the output for 2 coils at 60% = 18mA, leaves an excess flux density of 450mT.
It looks as if the greater the output load the higher the input can be before peak excess is reached, which is great but for the life of me does not make any sense?
The attached rar file contains the Femm file with two output coils and the lua script to cover the input/output current ranges.

Regards

Rob

[dingbat]

the increase in current to cause the full switching is what i expected, and i don't see anything good about it.

if the valve would work the same regardless of other fields it would be the silver bullet for sure.

the fact that it takes more current to switch on when another field is present is not good, i think.

if you reverse the opposing field so that it is assisting, does the off flux increase?  i think it will.  and the on current - Bn Diff peak - will drop becase the valve is already partially switched by the assisting field being present.

something very curious to me is the deviation in the PM on curve near the peak Bn Diff.

i am also having trouble understanding the greater flux value with the air core over the steel core - is this the sleeve around the magnet?  if so it makes some sense.  i guess that with the steel sleeve some of the flux is still shunting through the steel and not arriving at your output path.

isn't it odd how close the PM on curve is to the air curve after the switching has occurred?

[MeggerMan]

Hi,
I messed up the graphs for all the plots. Air should read steel and steel should read air.

I have re-done the previous post and removed the air core as this is not of any interest and really only confuses the plot.

The most important thing here is this is only a simulation and I exepect that things in the real world will look a little different.
Only plots of live data on real hardware will give anything worth considering.

Regards

Rob

[wizkycho]

hi all !

Coil wound directly round the magnet can be used
only if it is made of high mag. permeable high mag. saturation (Cu wire is niether) and isolated wire.
It allso has to have low resistance like Cu.
Magnet top and bottom (poles) allso must be covered with such material to bridge path from pole through coil
to another pole.

Igor

[MT]

Hi Rob,
It's bad, think I found problem with this transformator setup. I think it wont produce more electricity than you put in. Yesterday I tried again your last scheme from block3.rar. If you put all coils on the same current e.g. 0.01 in the outer leg will have ~ the same flux as when magnet is off. Yes we have more flux with same current comparing to steel core only but the same opposite current supresses all that extra flux.

I think it all has to do with non linearity magnetisation of material.

I hope you have some solution to this because I dont.

Marcel