- #1
Malverin
- 139
- 7
Hello,
If we have an electromagnet
with some lifting force, for example 10N, and make core area smaller at the ends, to concentrate the magnetic field (without saturating the core)
according to the formula, for magnetic flux
magnetic field density B , will be greater.
For example if we make area, 4 times smaller we will get 4 times greater B
Then electromagnet force will increase too, and become 4 time greater
So we get more force, without puting in additional energy.
But I have made a magnetic field simulation in FEMM
http://www.femm.info/wiki/HomePage
and there is an increase in B, but much smaller than this according to the formula.
Is there something wrong with the simulation, or my thoughts are wrong...?
http://en.wikipedia.org/wiki/Magnetic_flux
http://en.wikipedia.org/wiki/Electromagnet
If we have an electromagnet
with some lifting force, for example 10N, and make core area smaller at the ends, to concentrate the magnetic field (without saturating the core)
according to the formula, for magnetic flux
magnetic field density B , will be greater.
For example if we make area, 4 times smaller we will get 4 times greater B
Then electromagnet force will increase too, and become 4 time greater
So we get more force, without puting in additional energy.
But I have made a magnetic field simulation in FEMM
http://www.femm.info/wiki/HomePage
and there is an increase in B, but much smaller than this according to the formula.
Is there something wrong with the simulation, or my thoughts are wrong...?
http://en.wikipedia.org/wiki/Magnetic_flux
http://en.wikipedia.org/wiki/Electromagnet