Core Loss Coefficients for Electrical Steel
Under sinusoidal flux conditions, core loss is computed in the frequency domain as follows:
For a material with anisotropic core losses, the coefficients Kh, Kc, Ke, and Y have different values in different principal directions, that is, (Khx, Khy, Khz), (Kcx, Kcy, Kcz), (Kex, Key, Kez), and (Yx, Yy, Yz) in (x, y, z) directions, respectively.
When a DC component exists in the flux density, the core loss is modified to the following:
where
- Bm is the amplitude of the AC flux component,
- f is the frequency,
- Kh is the hysteresis core loss coefficient,
- Kc is the eddy-current core loss coefficient, and
- Ke is the excess core loss coefficient.
-
Y is the power of Bm for hysteresis core loss.
Cdc is computed from the following equation:
where
- Bdc is the DC flux component, and
- Kdc is the coefficient considering the DC flux bias effects.
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