steinmetz's equation

Questions

What does steinmetz's equation mean?

An empirical equation used to calculate the total power loss (core losses) per unit volume in magnetic materials when subjected to external sinusoidally varying magnetic flux: P_v=k·fᵃ·Bᵇ where P_v is the time average power loss per unit volume in milliwatts per cubic centimeter, f is frequency in kilohertz, and B is the peak magnetic flux density; k, a, and b, called the Steinmetz coefficients, are material parameters generally found empirically from the material's B-H hysteresis curve by curve fitting.

Where does steinmetz's equation come from?

Named after Charles Proteus Steinmetz, who proposed a similar equation on which this was based.

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