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 feature to characterize due to its nonlinear and past-dependent effects over a design. 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 a new method for measuring hysteresis based on a quasi-sinusoidal generator is presented which allows us to reach much higher values in frequency with a simple setup.
Palabras clave: magnetic hysteresis, soft ferrites, hysteresis modeling
21st IEEE Instrumentation and Measurement Technology Conference, Como, Como (Italia). 18 mayo 2004
Fecha de publicación: mayo 2004.
B. Tellini, R. Giannetti, G. Robles, S. Lizón-Martínez, A new method to characterize magnetic hysteresis in soft ferrites up to high frequencies, 21st IEEE Instrumentation and Measurement Technology Conference - IMTC 2004. Como, Italia, 18-20 Mayo 2004