Relative incremental permeability of soft ferrites as a function of the magnetic field H: an analytic approximation

An analytical approximation for the relative incremental permeability of soft ferrites as a function of the magnetic field H is proposed. The numerical values of the parameters of the approximation are given for several current materials. Experiments confirming its validity are reported. The approximation is useful in design of nonlinear magnetic components and in analysis of circuits using them.

[1]  S. Ben-Yaakov,et al.  A current-controlled variable-inductor for high frequency resonant power circuits , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[2]  I. Bonanni,et al.  High performances high voltage generator regulated by LVI , 1990, Fifth Annual Proceedings on Applied Power Electronics Conference and Exposition.

[3]  A. S. Kislovski.  Linear variable inductor (LVI) in single-phase telecom rectifiers , 1995, Proceedings of INTELEC 95. 17th International Telecommunications Energy Conference.

[4]  P. Tenant,et al.  Dynamic model for soft ferrites , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.