Füzer Ján, Dobák Samuel, Petryshynets Ivan, Kollár Peter, Kováč František, Slota Ján
Institute of Physics, Faculty of Science, Pavol Jozef Šafárik University in Košice, Park Angelinum 9, 04154 Košice, Slovakia.
Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, Slovakia.
Materials (Basel). 2021 Nov 15;14(22):6893. doi: 10.3390/ma14226893.
Manufacturing the magnetic cores in electrical machines impacts the magnetic performance of the electrical steel by inducing stresses near the cutting edge. In this paper, energy loss behaviour in non-oriented electrical steels punched with different cutting clearances before and after annealing is investigated. An experimental shear cutting tool was employed to punch the ring-shaped parts from electrical steels in a finished state with four different values of cutting clearance corresponding to 1%, 3%, 5%, and 7% of the sheet thickness. The effect of cutting clearance on the magnetic losses is derived and analysed by the statistical theory of losses and associated loss separation concept including the analysis of movable magnetic objects. In this framework, this paper assesses the combined effect of cutting clearance, frequency, and heat treatment on the hysteresis loops and iron losses in non-oriented FeSi electrical steels. Measurements have been performed from quasi-static to 400 Hz at peak induction = 1.0 T. Both states before and after heat treatment have been considered. The excess loss is observed as the most sensitive loss component to cutting clearance and its magneto-structural correlation is quantified.
电机中磁芯的制造会通过在切割边缘附近产生应力来影响电工钢的磁性能。本文研究了在退火前后，采用不同切割间隙冲压的无取向电工钢中的能量损耗行为。使用一种实验性剪切切割工具，从成品状态的电工钢上冲压出环形零件，切割间隙有四个不同值，分别对应板材厚度的1%、3%、5%和7%。通过损耗统计理论和相关的损耗分离概念（包括对可移动磁性物体的分析），推导并分析了切割间隙对磁损耗的影响。在此框架下，本文评估了切割间隙、频率和热处理对无取向FeSi电工钢磁滞回线和铁损的综合影响。在峰值磁感应强度B = 1.0 T的情况下，已从准静态到400 Hz进行了测量。同时考虑了热处理前后的两种状态。观察到过剩损耗是对切割间隙最敏感的损耗分量，并对其磁结构相关性进行了量化。
