Learning Forum

[JohnP]

I have 2 questions concerning the calculation of core losses in Ansys Maxwell 2D.

-       1. Core loss model: Electrical steel - Can you tell me roughly the algorithm used to calculate the time-dependent CoreLoss? I exported the fields at every mesh and time step over one electrical period, separated the frequency and Flux density of x- and y- component and used the formula below given in the Help. However, I did not obtain the (averaged) CoreLoss value calculated from Maxwell with the same kh, kc, ke. Is it a sort of 'moving FFT'? How ist the value Bdc calculated?

[HDLI]

1). Maxwell will use a dynamic core loss model. The reference is in "A dynamic core loss model for soft ferromagnetic and power ferrite materials in transient finite element analysis", https://ieeexplore.ieee.org/document/1284663. Generally, the above equation of the core loss is just for fitting or presenting the core loss density data measured by manufacture or yourself. If you export the flux density for each step time, you would do the FFT of the flux density for the frequency domain calculation of the core loss by using the core loss equation. Kdc is to consider DC bias effect on the hysteresis loss.
2). In hysteresis model that is another core loss calculation method, the hysteresis loss would be only based on the defined loop, maybe either static or dynamic loop specified by you. It does not consider other core losses. Thanks.
HDLI