Exact match. Not showing close matches.
PICList
Thread
'[ee]: Solenoids, is there a way to calc their powe'
2000\10\06@110358
by
rad0
Hello Sports Fans,
I was wondering if modern science yet knows
of a way to calculate the strength of a solenoid's
pulling/pushing force, by number of winds, or
diameter of wire, or current applied or voltage
etc
Is this possible?
Thanks Sports Fans!

http://www.piclist.com hint: The PICList is archived three different
ways. See http://www.piclist.com/#archives for details.
2000\10\06@124815
by
Simon Nield

F = BIL
where F is the force in Newtons
B is the magnetic field measured in... um...Newtons per ampmeter (yes that's probably cheating)
I is the current in amps
L is the length in meters of wire in the field
this assumes that the wire is at right angles to the field (which it will be), that the magnetic
field is constant (which it won't be, pretty sure a solenoid will use a long coil in a short gap,
but it should not be too far wrong)
probably assumes some other stuff too but I can't think of anything useful right now.
stuff that becomes apparent from the above:
more current means more force, until the wire burns out of you demagnetise the permanent magnet.
longer wire means more force, but to fit more wire in you will need to use thinner wire which will
mean lower current rating... not a great way to change to force of a solenoid, unless you feel like
winding a solenoid with rectangular section wire, which will give you a nice packing ratio...
Should give you a start anyway... if nothing else then try searching for that equation ;)
Regards,
Simon
p.s. have a happy w/e everyone. friday at last!

http://www.piclist.com hint: The PICList is archived three different
ways. See http://www.piclist.com/#archives for details.
2000\10\07@092404
by
Peter L. Peres
I don't know how modern this science is, but what you asked for depends on
the following items:
 the exact geometry of the winding, not just coil wire diameter.
 current through windings
 exact structure of the magnetic circuit
 exact shape of the magnetic field density over the entire volume of the
armature
 exact magnetic permeability of the armature
 exact position of the armature inside the solenoid.
I hope that I did not leave anything out. If you are good about computer
simulation then you can make a reasonably accurate model of a solenoid
with partially inserted core and obtain some reasonably accurate numbers.
The only way I know to do this is to buy the solenoid with a datasheet (or
find a datasheet for what you have).
Peter

http://www.piclist.com#nomail Going offline? Don't AutoReply us!
use spam_OUTlistservTakeThisOuTmitvma.mit.edu?body=SET%20PICList%20DIGEST
2000\10\07@114151
by
Scott Stephens
>Hello Sports Fans,
Do violent video games count :)
>I was wondering if modern science yet knows
>of a way to calculate the strength of a solenoid's
>pulling/pushing force, by number of winds, or
>diameter of wire, or current applied or voltage
>etc
>
>Is this possible?
Yes. If you do a web search for coil gun you may find what your are looking
for.
Scott

http://www.piclist.com#nomail Going offline? Don't AutoReply us!
use .....listservKILLspam@spam@mitvma.mit.edu?body=SET%20PICList%20DIGEST
More... (looser matching)
 Last day of these posts
 In 2000
, 2001 only
 Today
 New search...