Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Physics
Classical Physics
Electromagnetism
Coil Around A Tube - Iron Cylinder Inside Tube - How Many Turns Needed?
Reply to thread
Message
[QUOTE="jrmichler, post: 6835850, member: 638574"] A simple rule of thumb is that a magnetic field of strength one Tesla will exert a force of 58 lbs per square inch. That calculates to 45 lbs pull on a one inch diameter steel rod. The maximum practical field is about 1.6 Tesla, at which the force will be about 148 PSI. These numbers are for a magnet or electromagnet that clamps directly to a flat steel surface, where the area is the pole area of the magnet. You have an air gap through which the magnetic field passes. I once designed an electromagnet to deliver 1600 lbs force on a flat steel surface through a 1/8" air gap. That electromagnet needed 4000 ampere-turns to deliver the desired force through the air gap. It was designed for use with a 50 ampere power supply, so had 80 turns. My recollection is that I specified 10 gauge wire. There are more details in US Patent #6,389,941. The pull force is magnetic field strength multiplied by pole area. Then you need enough ampere-turns to push that field through the total magnetic reluctance. You can search [B]electromagnet design[/B] and [B]magnetic circuits[/B] for more information. I'm not familiar with the calculations for a solenoid electromagnet, but this should help you get started. [/QUOTE]
Insert quotes…
Post reply
Forums
Physics
Classical Physics
Electromagnetism
Coil Around A Tube - Iron Cylinder Inside Tube - How Many Turns Needed?
Back
Top