An Improved Model for Circulating Bearing Currents in Inverter-Fed AC Machines
An Improved Model for Circulating Bearing Currents in Inverter-Fed AC Machines
复制标题
逆变器交流电机中循环轴承电流的改进模型
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
S. Blume
中科院分区：
文献类型：
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作者：
M. Jaritz;C. Jaeger;M. Bucher;J. Smajic;D. Vukovic;S. Blume
本文提出了一种通用的集中参数轴承电流模型。集中参数来自轴承电流路径的解析描述和基于有限元法的数值场模拟。该模型考虑了频率依赖性。由此产生的模型提供共模电流和循环轴承电流是通过建模共模电流路径和循环轴承电流路径之间的磁耦合来确定的。导出的电路可以应用于交流电机，并通过测量永磁励磁同步电机进行验证，该电机由现成的电机驱动逆变器提供。
In this paper, a general lumped parameter bearing current model is presented. The lumped parameters are derived from the analytical descriptions of the bearing current paths and the numerical field simulations based on the finite element method. The model considers frequency dependence. The resulting model delivers the common mode current and the circulating bearing current is determined by modeling the magnetic coupling between the common mode current path and the circulating bearing current path. The derived circuit can be applied to AC machines and is verified by measurements of a permanent magnet excited synchronous machine, which is supplied by an off-the-shelf motor drive inverter.