Materials for Electric Power Conversion

Dear Colleagues,

Electric power conversion is one of the key problems for modern technology. The efficiency of such conversion sets the technical limits for renewable power sources, electro-mobility, and power storage. This problem is focused on both developments of smaller, lighter, more powerful, and more efficient electric power conversion devices (mostly focused on switching mode power conversion) as well as on incremental improvement of the efficiency of traditional transformers, which are widely used in all electric power networks. It should be highlighted that for these processes of technological development, precise and robust models reproducing the material properties are necessary.

One of the most important issues for the development of electric power conversion devices is the soft magnetic materials used for the cores of inductive components, as well as semiconducting materials for power transistors. Recently, the technological progress has been focused on processing of the rapidly quenched amorphous and nanocrystalline materials (also in the form of powder cores) as well as the production of advanced electric silicone steels and soft ferrites. Moreover, breakthrough technologies for power conversion control utilizing high-electron-mobility transistors (HEMT) made of gallium nitride (GaN) deposited on silicon carbide (SiC) are proposed have been introduced to the market. However, it should also be highlighted that development in the area of traditional metal oxide silicon field effect transistors (MOSFET) still plays a vital role in the improvement in quality of power conversion devices.

To strengthen the research and development process of electric power conversion devices, this Special Issue integrates the presentation of recent advances in the following areas:

• High-electron-mobility transistors (HEMT)
• Gallium nitride (GaN)
• Metal oxide silicon field effect transistors (MOSFET)
• Silicone steels
• Soft ferrites
• Amorphous magnetic alloys
• Nanocrystalline magnetic alloys
• High-temperature magnetic materials
• Sintering of powder materials
• Distributed-air-gap magnetic materials
• Plastic-iron powders
• Modelling the properties of materials for power conversion
• Other issues important for materials for electric power conversion

We hope that the results of recent research and technical development presented in this Special Issue will be useful for both researchers and engineers solving problems of modern materials for electric power conversion.

Prof. Dr. Roman Szewczyk
Dr. Michał Nowicki
Dr. Anna Ostaszewska-Liżewska
Guest Editors

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• switching mode power supplies
• electric transformers
• magnetic cores
• magnetic materials
• high-electron-mobility transistors (HEMT)
• gallium nitride (GaN)
• MOSFET