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# Re: [femm] about magnetization of magnets

- To: femm@yahoogroups.com
- Subject: Re: [femm] about magnetization of magnets
- From: prem swaroop <swaroopk4u@yahoo.co.in>
- Date: Fri, 26 Sep 2003 15:46:53 +0100 (BST)
- In-reply-to: <5.0.2.1.2.20030918170838.00a6a3c8@mailhost.ensem.inpl-nancy.fr>

HAI
THIS IS PREM SWAROOP
I AM DOING MY B.E ELECTRICAL
CAN U HELP ME IN MY PROJECT WORK
I LIKE TO DO IN 'REDUCING RELUCTANCE IN DC MACHINES
PLZ MAIL TO ME
BYE
Ramdane LATEB <ramdane.lateb@ensem.inpl-nancy.fr> wrote:

> `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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- References:
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    - From: Ramdane LATEB <ramdane.lateb@ensem.inpl-nancy.fr>

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