Hysteresis loop in maxwell

  • Thread starter pedro1988
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  • #1
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Main Question or Discussion Point

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
 

Answers and Replies

  • #2
gerbi
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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).
 
  • #3
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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
 
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  • #4
gerbi
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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).
 
  • #5
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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
 
  • #6
gerbi
Gold Member
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It can be done with average values (single curve for +H/+B). Thats how it's done in most cases.
 
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  • #7
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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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