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An Improved Model for Circulating Bearing Currents in Inverter-Fed AC Machines

机译:交流变频电机交流轴承电流的改进模型

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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.
机译:本文提出了一个通用的集总参数轴承电流模型。集总参数来自轴承电流路径的分析描述和基于有限元方法的数值模拟。该模型考虑了频率依赖性。所得模型传递共模电流,并且通过对共模电流路径和循环轴承电流路径之间的磁耦合建模来确定循环轴承电流。派生电路可应用于交流电机,并通过对永磁励磁同步电机的测量进行验证,该电机由现成的电机驱动逆变器提供。

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