Review of analytical methods to extract magnetic parameters of an inductively coupled circuit

Venugopal, Prasanth; Bauer, Pavol; Ferreira, J.A.; Polinder, H.

doi:10.1109/wow.2015.7132837

Cited by 1 publication

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References 68 publications

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“…To improve the efficiency of the magnetic components such as power converters and to avoid the need of sophisticated cooling systems, it is necessary to limit the heat generation in the magnetic components. In the design of a power converter, it is important to choose the appropriate alloy from a magnetic point of view but it is also important to take into account the thermal constraints due to heat generation and the dependence of the magnetic properties on the temperature [4][5][6][7][8][9]. In this paper, the complex permeability of a toroidal core of nanocrystalline FeNbCuSiB alloys is indirectly measured versus the frequency and at different temperatures ranging from 20°C to 180°C.…”

Section: Introductionmentioning

confidence: 99%

Complex Permeability Measurements in a Nanocrystalline Toroidal Core

2016

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In the design of power electronic converters, the choice of the suitable magnetic alloys and the measurement of the variations of their magnetic properties versus the temperature are fundamental issues. A theoretical model based on Neel theory and that takes into account wall displacement and coherent rotation was elaborated to derive the expression of the complex permeability versus the frequency. The static and the dynamic behavior are considered. The dependence of temperature is implicit in this model, i.e. the parameters involved in the expression of the complex permeability may depend on the temperature. An impedance analyzer has been used to measure the open circuit and short circuit complex impedances of a toroidal core versus the frequency at several temperatures ranging from 20°C to 180°C. The complex permeability of the material is then deduced. Finally, the theoretical model is used to identify the domain susceptibility and the anisotropy energy of the materials. The effect of temperature on these parameters is analyzed. The result obtained are valuable for the design of a power electronic converters from the magnetic and thermal viewpoints. The results prove the need for the combination of heat transfer and magnetic mechanisms at the design.

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