Improved Core-Loss Calculation for Magnetic Components Employed in Power Electronic Systems

作者：J. Mühlethaler, J. Biela, Johann W. Kolar, A. Ecklebe · 发表于：IEEE Transactions on Power Electronics · 年份：2011 · DOI：10.1109/tpel.2011.2162252 · 被引用次数：521 · 研究领域：Magnetic Properties and Applications、Advanced DC-DC Converters、Induction Heating and Inverter Technology

In modern power electronic systems, voltages across inductors or transformers generally show rectangular shapes, including periods of zero voltage. In the stage of zero applied voltage (constant flux), core losses are not necessarily zero. At the beginning of a period of constant flux, losses still occur in the material. This is due to relaxation processes. A physical explanation about magnetic relaxation is given and a new core-loss modeling approach that takes relaxation effects into consideration is introduced. The new loss model is called improved-improved generalized Steinmetz equation and it has been verified experimentally.