[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

# Re: [femm] Re: Temperature dependence of PM materials

- To: femm@yahoogroups.com
- Subject: Re: [femm] Re: Temperature dependence of PM materials
- From: Keith Gregory <k.gregory@lboro.ac.uk>
- Date: Fri, 04 Oct 2002 08:01:10 +0100
- In-reply-to: <ani7lj+8c04@eGroups.com>
- References: <anh0cr+94aj@eGroups.com>

`At 20:00 03/10/2002 +0000, you wrote:`

>     --- In femm@y..., "fj_emtc" <fije29@s...> wrote:
>     > --- In femm@y..., David Meeker <dmeeker@i...> wrote:
>     > > I'm looking at sort of an odd application in which it would be
>     > desirable
>     > > to have a PM material with a very strong temperature dependence.
>     >
>     > Thermoflux (VaC) is a soft magnetic material with very high
>     > temperature dependency in the requiered range. Perhaps this could be
>     > used as a sort of back-iron together with 'standard' permanent
>     > material?? Hard to say without knowing more of the application, but
>     > another way of looking at the problem.
>     >
>     >
>     > Finn Jensen\

>     Thanks a lot for the pointer--I wasn't aware of this material. This
>     could be just the ticket--it's sort of a fuse-like application where
>     we want a change in temperature to produce a mechanical change (e.g. a
>     change in force on a linchpin or something) w/out having to provide
>     outside power, sensing, etc.

>     The best that I could come up with otherwise was just what Marc was
>     talking about--high-strength magnets. I was thinking that I could run
>     them in repulsion so that they were operating very low on the
>     demagnetization curve. With relatively small changes in temperature,
>     the magnets would demagnetize each other.

>     Anyhow, thanks again to all. I'll have to see if I can scrounge up
>     something on "ferrites with curie point near room temperature," as
>     suggested by Kirk. (btw, is Thermoflux an example of such a material?)

> `Dave.`
> ``
> ``
> `
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/`

    Dr. Keith Gregory
    Senior Lecturer
    Department of Electronic & Electrical Engineering
    Loughborough University
    Loughborough
    Leicestershire
    LE11 3TU
    UK

    Phone: +44 (0) 1509 227025 Fax: +44 (0) 1509 227014
    Department web: http://www.lboro.ac.uk/departments/el/

``

- References:
  - Re: Temperature dependence of PM materials
    - From: "fj_emtc" <fije29@sol.dk>
  - Re: Temperature dependence of PM materials
    - From: "David Meeker" <dcm3c@earthlink.net>

- Prev by Date: Re: Temperature dependence of PM materials
- Next by Date: RE: [femm] Temperature dependence of PM materials
- Previous by thread: Re: Temperature dependence of PM materials
- Next by thread: Re: Temperature dependence of PM materials
- Index(es):
  - Date
  - Thread