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- To: femm@yahoogroups.com Subject:about magnetization of magnets
- From: Ramdane LATEB <ramdane.lateb@ensem.inpl-nancy.fr>
- Date: Thu, 18 Sep 2003 17:10:38 +0200

`hello femm's members,`
`My question is about magnetization of magnets, it seems
that the magnetization in femm depends on the number of subdivisions in magnets, I mean even if I put a radial magnetization in the middle of a span magnet, this seems true if the span is very small, but if the span is important I have to split the magnet into sub-magnets. What (I think)
I have understood is that it's rather a global magnetization,
more largest the span is, more parallel the magnetization
is, and less largest the span is, more radial the magnetization
is, so to have a radial magnetization I have to split the magnet into sub-magnets. I 'm wondering if someone else have observed this phenomenon in femm (perhaps it has been discussed before, if so , thank you to direct me to the corresponding messages). or your own experience, trie with a span magnet of 150° (electrical), with out splitting the magnet, and look to the back fem (or magnetic flux) in one tooth and the cogging torque (no load), and make the same when splitting the magnet in four (I mean splitting ,by just adding radial segments and adding a radial magnetization in each created sub magnet, and use a same mesh to approach the number of global nodes), the difference is rather observed in both cogging an tooth magnetic flux.`
`Any advice is welcome, thank you`
``

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