铁磁性
电感器
变压器
波形
磁通量
材料科学
电压
机械
磁滞
磁芯
电气工程
工程类
物理
磁场
磁化
电磁线圈
量子力学
作者
J. Reinert,A. Brockmeyer,R.W.A.A. De Doncker
出处
期刊:IEEE Transactions on Industry Applications
[Institute of Electrical and Electronics Engineers]
日期:2001-01-01
卷期号:37 (4): 1055-1061
被引量:551
摘要
This paper discusses the influence of nonsinusoidal flux waveforms on the remagnetization losses in ferro- and ferrimagnetic materials of inductors, transformers, and electrical machines used in power electronic applications. The nonsinusoidal changes of flux originate from driving these devices by nonsinusoidal voltages and currents at different switching frequencies. A detailed examination of a dynamic hysteresis model shows that the physical origin of losses in magnetic material is the average rate of remagnetization rather than the remagnetization frequency. This principle leads to a modification of the most common calculation rule for magnetic core losses, i.e., to the "modified Steinmetz equation" (MSE). In the MSE, the remagnetization frequency is replaced by an equivalent frequency which is calculated from the average remagnetization rate. This approach allows, for the first time, the calculation of the losses in the time domain for arbitrary waveforms of flux while using the available set of parameters of the classical Steinmetz equation. DC premagnetization of the material, having a substantial influence on the losses, can also be included. Extensive measurements verify the MSE presented in this paper.
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