A new method for automatic characterization of the magnetisation curves of magnetic materials

A general method of analysis for predicting the harmonic and intermodulation performance of B-H loops is presented. The magnetization curve is modeled by a sine series. The amplitudes of the harmonics and intermodulation products are expressed in terms of Bessel functions with arguments proportional to the amplitudes of the exciting multisinusoidal input. It is shown that the amplitude of the third-order intermodulation type ω_p+ω_s-ω_q resulting from exciting the magnetic material by three sinusoids at frequencies ω_p, ω_s, and ω_q is the most reliable parameter for characterizing magnetic materials. Algebraic equations are also presented for computer-aided characterization of the magnetization curves