Petrescu Lucian-Gabriel, Petrescu Maria-Cătălina, Ioniță Valentin, Cazacu Emil, Constantinescu Cătălin-Daniel
Department of Electrical Engineering, Faculty of Electrical Engineering, University "POLITEHNICA" of Bucharest, 313 Splaiul Independentei, RO-060042 Bucharest, Romania.
IRCER-CNRS UMR 7315, University of Limoges, F-87068 Limoges, France.
Materials (Basel). 2019 Sep 27;12(19):3173. doi: 10.3390/ma12193173.
A soft magnetic MnZn-type ferrite is considered for high frequency applications. First, the morphological, structural, and chemical composition of the material are presented and discussed. Subsequently, by using a vibrating sample magnetometer (VSM), the hysteresis loops are recorded. The open magnetic circuit measurements are corrected by employing demagnetization factors, and by taking into consideration the local magnetic susceptibility. Finally, the hysteresis losses are estimated by the Steinmetz approach, and the results are compared with available commercial information provided by selected MnZn ferrite manufacturers. Such materials are representative in planar inductor and transformer cores due to their typically low losses at high frequency, i.e., up to several MHz, in low-to-medium power applications and providing high efficiency of up to 97%-99%.
一种软磁锰锌铁氧体被考虑用于高频应用。首先，介绍并讨论了该材料的形态、结构和化学成分。随后，使用振动样品磁强计（VSM）记录磁滞回线。通过采用退磁因子并考虑局部磁化率来校正开路磁路测量。最后，通过斯坦梅茨方法估计磁滞损耗，并将结果与选定的锰锌铁氧体制造商提供的现有商业信息进行比较。由于这类材料在低至中功率应用中，在高达几兆赫兹的高频下通常具有低损耗，可提供高达97%-99%的高效率，因此在平面电感器和变压器铁芯中具有代表性。
