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Hysteresis loop in maxwell

  1. Jun 24, 2014 #1
    hi my dear friends

    i face with a problem in ansoft maxwell;

    i want to import a hysteresis material's loop into maxwell's material s libraray

    but i cant!:(

    is there anyone who can help me?

    with the best wishes:)

    pedro
     
  2. jcsd
  3. Jun 24, 2014 #2

    gerbi

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    Gold Member

    In material library click "add material". Now you can define parameters of your new material. Select "nonlinear" instead of "simple" for relative permeability and then left-click on newly appeared button "B-H curve". Add B-H points defining curve here.
    Another approach (when you need to define B-H loops in all 3 directions x,y,z) is to select "anisotropic" instead of "nonlinear" in first step. Then you can select "nonlinear" for every axis (and three separate B-H curves).

    One more thing. This feature has evolved in maxwell, so it may not be avaible in your version for some solvers or may be working a little differently (I am using v.16.0.0).
     
  4. Jun 25, 2014 #3
    i use v16.0.0
    AND i do what you say
    but its not accept a b-h curve points and says "
    http://s1.uploads.im/BUlWJ.jpg [Broken]
    http://s1.uploads.im/BUlWJ.jpg [Broken]



    THANKS A LOT
     
    Last edited by a moderator: May 6, 2017
  5. Jun 25, 2014 #4

    gerbi

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    Gold Member

    Hmm.. you want to input full B-H curve ? No chance. Use only one quarter of characteristic (+ H / + B) and average values (maxwell will accept only single B-H curve).
     
  6. Jun 25, 2014 #5
    realy??!!

    no way to import full b-h curve?

    so how a motor can be designed with hysteresis material.....:(:(


    its too bad

    thank you for cooperation
     
  7. Jun 25, 2014 #6

    gerbi

    User Avatar
    Gold Member

    It can be done with average values (single curve for +H/+B). Thats how it's done in most cases.
     
  8. Jun 26, 2014 #7
    Most magnetostatic simulators solve linear material models only. Yes, it sucks but you can do surprisingly well by using a linear simulation and simply watching out for fields that approach within 80% of the saturation field. The simulations for linear are radically faster than those that include hysteresis (which is both nonlinear AND time-dependent).
     
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