Learning Forum

[wtomas250]

Hello Everyone,I am trying to simulate an AC current electromagnet ( something simple, a core and a winding), in the design I used a non-laminated core, so there is no parameter like sheet thickness. I am interested in simulating the amount of heat it would generate due to Eddy current in a non-laminated core using AC current using the transient magnetic solver, basically calculating the losses separately (Hysteresis losses, Eddy Current and Excess Losses). There are 3 models for loss calculation, Electrical Steel, Power Ferrite and Hysteresis Model.nIn Electrical Steel it uses the core loss coefficients calculation method (Kc, Kh, Ke and Kdc), however the Kc (For eddy current) is a parameter related to sheet thickness, so I guess I can't use this model for bulk materials.nThe Power Ferrite and Hysteresis Model give me approximate value of Total Core Loss (which includes eddy current losses) but doesnt give any eddy current losses data.n¿Is there any sort of Workaround to the Issue I am having? nThanks!n

[icellb1]

Hi, @wtomas250,
Thanks for the question. May I ask where you obtained the statement "the Kc (For eddy current) is a parameter related to sheet thickness, so I guess I can't use this model for bulk materials"? Is this from Ansys Maxwell training material or some published paper? Thank you.

[wtomas250]

Hi!
I found this research paper and in the second page it says below the (3) Formula that Kc is directly proportional to the square of "d", which is the lamination thickness , (I verified in the Maxwell Online Help that indeed, that is the formula)
Regards
https://www.researchgate.net/profile/Serdal_Arslan/publication/277501783_Investigation_for_Losses_of_M19_and_Amorphous_Core_Materials_Asynchronous_Motor_by_Finite_Elements_Methods/links/556da2e708aeab77722418fd/Investigation-for-Losses-of-M19-and-Amorphous-Core-Materials-Asynchronous-Motor-by-Finite-Elements-Methods.pdf

[icellb1]

Hi, @wtomas250,
Thanks for the response. It's correct Kc is related to lamination thickness but that doesn't mean we cannot model bulk material core loss in Maxwell. As long as you know the K parameter values, or you have B-P curve(s) to input so Maxwell will calculated K parameters automatically based on the core-loss density curves. It's true if you want to model eddy current loss separately you'll need to select Electric steel mode.

[fateme]

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hi every body

i have a question

i designed an induction motor in ansys maxwell and i run it into transient mode.i want to know how can i calculate excess loss?

i import every parameter about core into material definition and ansys maxwell determines kc(eddy current coefficient) & kh(hysteresis coefficient) but ke was zero and then i saw excess loss was zero.

how can i calculate excess loss?

thanks for everything

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