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A Novel Method for the Prediction of Remagnetization Losses in Ferro- and ferrimagnetic material
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| Author(s) |
A. Brockmeyer; J. Reinert; R. W. De Doncker |
| Abstract |
Inductors, transformers and electrical machines used in power electronic applications are usually exposed to non-sinusoidal voltages and currents. Therefore, the ferro- or ferrimagnetic material of these components is subjected to non-sinusoidal changes of flux. This paper discusses the influence of non-sinusoidal flux-waveforms on the remagnetization losses of magnetic materials. The physiscal origin of the power losses and different approaches for their calculation that have been presented in the past are reviewed. A detailed examination of a dynamic hysteresis model shows that the average remagnetization velocity is the physical origin of dynamic losses in magnetic material rather than the remagnetization frequency. this knowledge leads to an extension of the most common calculation rule for magnetic core losses, the Steinmetz-equation: The remagnetization frequency is replaced by an equivalent frequency that is calculated from the average remagnetization velocity. This gives the opportunity to calculate the losses in the time domain for arbitrary waveforms of flux. the whole set of parameters of the Steinmetz equation that is already known can be used. Extensive measurements verify the modified Steinmetz equation presented in this paper. |
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| Filename: | EPE1999 - PP00771 - Brockmeyer.pdf |
| Filesize: | 791.6 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-04-01 by System |
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