Effect of the Temperature on the Magnetic and Energetic Properties of Soft Magnetic Composite Materials

Luca Ferraris,Marco Actis Grande,Fausto Franchini,Emir Pošković,Róbert Bidulský

doi:10.3390/en14154400

Luca Ferraris, Marco Actis Grande + Show 3 more

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https://doi.org/10.3390/en14154400

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Journal: Energies	Publication Date: Jul 21, 2021
Citations: 8	License type: CC BY 4.0

Affiliation: Polytechnic University of Turin

Abstract

In recent years, innovative magnetic materials have been introduced in the field of electrical machines. In the ambit of soft magnetic materials, laminated steels guarantee good robustness and high magnetic performance but, in some high-frequency applications, can be replaced by Soft Magnetic Composite (SMC) materials. SMC materials allow us to reduce the eddy currents and to design innovative 3D magnetic circuits. In general, SMCs are characterized at room temperature, but as electrical machines operate at high temperature (around 100 °C), an investigation analysis of the temperature effect has been carried out on these materials; in particular, three SMC samples with different binder percentages and process parameters have been considered for magnetic and energetic characterization.

Highlights

Magnetic materials play a significant role in many applications; they are most widespread in the electrical machines sector
The results show that the maximum magnetic permeability improves with the temperature increase, and even better results are obtained on the specific iron losses reduction
It is evident that the binder content affects the energetic behavior of Soft Magnetic Composite (SMC) in the expected operating conditions, and the values remain constant at different frequencies

Summary

Introduction

Magnetic materials play a significant role in many applications; they are most widespread in the electrical machines sector. Thanks to the reduced contribution of eddy currents losses, SMCs can operate at medium-high frequencies keeping their magnetic characteristics almost unchanged [35,36,37]. Such materials give the possibility to design innovative electrical motors with very complex geometries, taking advantage of their 3D behavior [28]. Between these electrical machines, axial flux motor (AFM) [38,39], transverse flux motor (TFM) [40,41,42], claw pole motor (CPM) [43] and others [44,45,46] should be cited and considered of significant interest for the operators of the sector

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Conclusion