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Solenoid to fire magnetic ball, question about best core material)

by d4rr3n
Tags: ball, core, magnetic, material, solenoid
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d4rr3n
#1
May13-14, 05:54 PM
P: 40
So I want to fire a magnetic ball through a solenoid coil but want to know if core material can enhance the performance. Would wire wrapped around soft Iron tube core work better then say a thin copper tube?

The aim is to increase efficiency so less power needs to be used to fire the magnetic ball, and yes I know the ball would be attracted to the Iron.
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Simon Bridge
#2
May13-14, 10:40 PM
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<puzzled> The iron core will stop the ball from going through the solenoid though.
berkeman
#3
May13-14, 10:54 PM
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Quote Quote by d4rr3n View Post
So I want to fire a magnetic ball through a solenoid coil but want to know if core material can enhance the performance. Would wire wrapped around soft Iron tube core work better then say a thin copper tube?

The aim is to increase efficiency so less power needs to be used to fire the magnetic ball, and yes I know the ball would be attracted to the Iron.
What is the context of your question? Why do you want to fire a metal ball?

d4rr3n
#4
May14-14, 06:19 AM
P: 40
Solenoid to fire magnetic ball, question about best core material)

Quote Quote by Simon Bridge View Post
<puzzled> The iron core will stop the ball from going through the solenoid though.
I clearly said it's a tube, an Iron tube.
d4rr3n
#5
May14-14, 06:20 AM
P: 40
Quote Quote by berkeman View Post
What is the context of your question? Why do you want to fire a metal ball?
I don't want to fire a metal ball, I want to fire a magnet
Simon Bridge
#6
May14-14, 06:48 AM
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Quote Quote by d4rr3n View Post
I clearly said it's a tube, an Iron tube.
... fair enough: http://www.physicsforums.com/showthread.php?t=75339

What is the context of your question? Why do you want to fire a metal ball?
Quote Quote by d4rr3n View Post
I don't want to fire a metal ball, I want to fire a magnet
... OK then, What is the context of your question? Why do you want to fire a magnet?
Simon Bridge
#7
May15-14, 05:46 AM
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Any material that does not hog the magnetic field will help.
d4rr3n
#8
May15-14, 06:05 AM
P: 40
Hog,you mean shield?

I know that in a standard solenoid an Iron core (tube) improves performance but a solenoid is accelerating an Iron piston, I'm wondering if its accelerating a magnetised piston will this change.
homemade
#9
May15-14, 12:57 PM
P: 6
Would progressive fields activated by the magnet's position be used or is it one field? The magnet could activate the next propelling field by a ferric trigger. Spacing fields/triggers would take some work but that would be interesting. The dynamics of the unstable rolling magnet will be a problem with the pole being unlocked. Perhaps a sacrificial container jacket for ball on its ride up the pipe to stabilize the pole for magnetic field synch over progressive propulsion fields.
Simon Bridge
#10
May15-14, 07:43 PM
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"Hog" as in the iron gathers all the field lines like a partner hogs the blankets.
That's how the shielding effect happens and also how iron slugs help.
Having a megneic piston changes too many variables to comment - you'll have to do it and see.

homemade is talking about linear accelerator design - you don't need triggers though, just a timer.
I believe your original question has been answered.


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