FEMM simulation showing COP 3 and 7

[broli]

Found a local distributor for black painted steel strapping. They deliver all over europe:

http://www.recypack.co.uk/_london/index.php?search=steel&page=search&submit=Zoek#

Although it's hard to make out the dimension of the coil it seems to be rather very cheap.

[neptune]

@broli . Thanks for at least considering my request re illustration . The black steel strapping can often be found in skips [dumpsters] outside warehouses , construction sites and on docks and wharves . Anywhere heavy goods are strapped to pallets .

[teslaalset]

Hey Broli,

Excellent work being done here!
Sorry for not stepping in earlier, but I am too occupied with the stuff of Thane for the moment, as you are aware of.

Just a quick question/remark on your FEMM simulations:
I checked your lua file and something wondered me.
If you move one element (in either of the 4 four loops), you only obtain the force of the moved element.
But in my view, when you move an element, you should also check the forces on the other elements in my view, since they likely are influenced as well due to that movement.
I'll try to post a modified lua if I can find sufficient time, to see if this is valid or not.

[broli]

Hey Broli,

Excellent work being done here!
Sorry for not stepping in earlier, but I am too occupied with the stuff of Thane for the moment, as you are aware of.

Just a quick question/remark on your FEMM simulations:
I checked your lua file and something wondered me.
If you move one element (in either of the 4 four loops), you only obtain the force of the moved element.
But in my view, when you move an element, you should also check the forces on the other elements in my view, since they likely are influenced as well due to that movement.
I'll try to post a modified lua if I can find sufficient time, to see if this is valid or not.

I move either the magnets or cores simultaneously. The force on one magnet should be equal and opposite to the other magnet as the system is symmetrical. Also there's no need to look at the forces on the magnets when the cores are moving or vice versa, because when one is moving the other is kept stationary.

[teslaalset]

I move either the magnets or cores simultaneously. The force on one magnet should be equal and opposite to the other magnet as the system is symmetrical. Also there's no need to look at the forces on the magnets when the other cores are moving or vice versa, because when one is moving the other is kept stationary.

Doesn't keeping elements stationary when forces are present also consume energy?