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# Re: [femm] Electro magnet

- To: <femm@yahoogroups.com>
- Subject: Re: [femm] Electro magnet
- From: "Hendrik Hasper" <h.hasper@phys.rug.nl>
- Date: Tue, 1 Jul 2003 10:09:26 +0200
- Disposition-notification-to: "Hendrik Hasper" <h.hasper@phys.rug.nl>
- References: <20030629091248.75685.qmail@web20209.mail.yahoo.com> <00de01c33f41$4d2af1b0$f001a8c0@sefdp008>

for an optimization process including discrete parameters, like wire-thickness, see http://www.mathworks.com/matlabcentral/fileexchange/loadCategory.do?objectType=category&objectId=5 using MATLAB as base software:
| Download Now:
| File Name: | bnb.zip
| Author: | E.C. Kuipers
| Summary: | BNB18 solves mixed integer nonlinear optimization problems
| Submitted: | 2000-02-14
| Downloads: | 2706
| Description: | BNB18 solves mixed integer nonlinear optimization problems. It is a branch-and-bound type algorithm.
File Details |
| File Id: | 95 | Average review: | 4.5
| MATLAB Release: | R11 | # of reviews: | 2
| Size: | 93KB | Subscribers: | 12
| Keywords: | mixed,nonlinear,branch-and-bound,optimization
| Required Products: | Optimization
Best regards Hendrik Hasper ----- Original Message ----- From: Eric Vogels To: femm@yahoogroups.com Sent: Monday, June 30, 2003 9:53 PM Subject: [femm] Electro magnet Dear all. I'm not sure my question fits in this forum. If not, the moderator may remove it. My question is: I have no knowledge about electro magnets but I want to design an electro magnet that operates without an iron (or any magnetic material) core. I hope that is possible. As power I have 3 Volt, 3.6 Watt (from a bicycle dynamo). How do I calculate the strongest electro magnet (wire thickness, coil diameter, coil size, number of turns). Thanks in advance. Eric Vogels. `Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.`

- References:
  - help
    - From: eaid goda <eaidgoda@yahoo.com>
  - Electro magnet
    - From: "Eric Vogels" <eric.vogels@telia.com>

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