Core Loss Parameter Extraction for Power Ferrite Materials

The principles of the computation algorithm for C_m, X, and Y are summarized below.

The power-ferrite iron-core loss without DC flux bias is expressed as the following:

or

where f is the frequency, and B_m is the amplitude of the applied sinusoidal flux density waveform, and C = log⁡(C_m).

The parameters C, X, and Y can be derived by minimizing the error between the measured and modeled core loss curves at different frequencies f and varied flux density amplitudes B_m expressed as

or

where P_mij and P_vij are the measured and modeled core losses at different frequencies f_j and varied flux density amplitudes B_mi, n is the number of points of the measured core loss curve, and m is the number of curves of different frequencies.

After C, X, and Y have been determined by linear regression, parameter C_m can be obtained from C_m = e^C.

Related Topics 

Core Loss Model for a Maxwell Material

Calculating Properties for Core Loss BP Curve

Core Loss Coefficient Extraction from Single-Frequency Loss Curve

Core Loss Coefficient Extraction from Multi-Frequency Loss Curves

Setting Core Loss for Transient and Eddy Current Solvers