A new method to characterize magnetic hysteresis is soft ferrites up to high frequencies

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https://doi.org/10.1109/TIM.2005.861494

B. Tellini, R. Giannetti, G. Robles, S. Lizón. A new method to characterize magnetic hysteresis is soft ferrites up to high frequencies, IEEE Transactions on Instrumentation and Measurement, Vol. 55, pp. 311-315, Feb. 2006

Abstract – Characterization of magnetic cores is an indispensable task in order to securely accomplish the requirements of a power electronic design and prevent failures. The hysteresis cycle of the material is one of the more complex features to characterize due to the well known non-linear and memory effects; moreover, there is a less known but noticeable dependence of the B-H relationship with time. This curve is easily obtained at low frequencies (up to 10kHz) by means of a well-known traditional method. However, there is a major obstacle when trying to operate at higher frequencies in this manner due to the cost and difficulty of operation of high frequency-high voltage generators. In this paper is presented a new method for measuring hysteresis based on a quasi-sinusoidal generator which allows us to reach much higher values in frequency with a simple setup.

Keywords – Ferrites, ferromagnetic materials, frequency response, magnetif field measurements, magnetic hysteresis, nonlinear magnetics, soft magnetic materials.