How can I import a hysteresis material's loop into Ansoft Maxwell?

[pedro1988]

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

 

[gerbi]

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).

 

[pedro1988]

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
http://s1.uploads.im/BUlWJ.jpg



THANKS A LOT

 

[gerbi]

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).

 

[pedro1988]

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

 

[gerbi]

It can be done with average values (single curve for +H/+B). Thats how it's done in most cases.

 

[jsgruszynski]

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).