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

# Re: PM design - Simulation results far from Prototype results....

- To: femm@yahoogroups.com
- Subject: Re: PM design - Simulation results far from Prototype results....
- From: "rooom99" <kramer-b@t-online.de>
- Date: Sat, 28 Jun 2003 14:30:59 -0000
- In-reply-to: <20030624132550.2679.qmail@web80505.mail.yahoo.com>
- User-agent: eGroups-EW/0.82

    Dear Tony,

    Whats your gap geometry? Gap width, gap height?

    Better use 1010 low carbon steel for loudspeaker magnets.
    It is available without problems (check Taiwan sources).
    To reduce the carbon content, you can anneal the steel.

    Hope it helps....

    Regards,
    Hermann

    --- In femm@yahoogroups.com, Sven Olsen <a1greatdane@y...> wrote:
    > Dear Tony,
    > I take it we are talking about a circular airgap structure for a
    loudspeaker voice coil. You indicate 1.2 Tesla in this gap, but the
    steel pieces can very well be saturated - check with the cursor in
    femm for point properties and see what the reading are or lay a line
    contour through the steel. If you read more than 2 Tesla, there's a
    good chance your 1018 steel is saturated.
    > Best regards
    >
    >
    > tonyrouget <tonyrouget@y...> wrote:
    > Dear All,
    > Thanks for your help and share of knowledge...
    >
    > 1)I am pretty sure about the Neo35H since I have the spec sheet and
    > it's a reliable supplier,
    >
    > however I wasn't expecting the Steel to be one of my problem..Maybe
    I
    > have too much saturation in my design..
    >
    > Is 1.2T saturated for 1018 steel ?? I thought it was a bit higher
    for
    > the 1018..
    >
    > Thanks for your help.
    >
    > Regards
    > Tony
    >
    >
    >
    >
    >
    >
    >
    >
    > --- In femm@yahoogroups.com, Sven Olsen <a1greatdane@y...> wrote:
    > > Dear Tony,
    > > the results I have with using femm indicates that some thing else
    > is wrong in your real world implementation. My real world results
    is
    > normaly at max 5% out from the simulations. Are you sure about your
    > quality of steel? It only takes a small lead contenst to render the
    > magnetic quality of the steel virtually useless. How about the
    > quality of the neo? You say 35N, but are you sure? There's many
    > qualities comming out of 'ping-pong land'. Is the neo fully and
    > optimally magnetized? It takes a very serius magnetizer to fully
    > charge the circuit.
    > > Best regards
    > > A1greatdane
    > >
    > > tonyrouget <tonyrouget@y...> wrote:
    > > Dear All,
    > >
    > > First of all, thanks David for your great software!!
    > >
    > > I have a quick question:
    > >
    > > Did anybody already experienced any problems to relate Femm
    > > simulation results with the real world??
    > >
    > > And if Yes, what could be the cause of the simulation error.???
    > >
    > > In other words, I have designed a loudspeaker motor assembly with
    > > Neodymium 35 and I was expecting 1.2 to 1.4T in the airgap.
    > > Confident of my design and simulation results I built a prototype
    > and
    > > could only get 0.8T Maximum in my Airgap with the Gaussmeter..
    > >
    > > I am using 1018 Steel and Neo 35H. I've been inputing the tech
    > specs
    > > of my magnet and editing a new model in my library..
    > >
    > > If you had already experienced simulation problems, please give
    me
    > > your input..
    > >
    > > Regards
    > > Tony
    > >
    > >
    > >
    > >
    > >
    > > Yahoo! Groups Sponsor
    > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of
    > Service.
    > >
    > >
    > > ---------------------------------
    > > Do you Yahoo!?
    > > SBC Yahoo! DSL - Now only $29.95 per month!
    >
    >
    >
    > Yahoo! Groups SponsorADVERTISEMENT
    >
    > Your use of Yahoo! Groups is subject to the Yahoo! Terms of
    Service.
    >
    >
    > ---------------------------------
    > Do you Yahoo!?
    > SBC Yahoo! DSL - Now only $29.95 per month!

- References:
  - Re: [femm] Re: PM design - Simulation results far from Prototype results....
    - From: Sven Olsen <a1greatdane@yahoo.com>

- Prev by Date: Re: grad(H^2) plot
- Next by Date: help
- Previous by thread: Re: [femm] Re: PM design - Simulation results far from Prototype results....
- Next by thread: Re: [femm] PM design - Simulation results far from Prototype results....
- Index(es):
  - Date
  - Thread