This article presents modeling of the conducted emission of a motor control inverter using a lumped parameter circuit and finite-element (FE)-based three-dimensional (3-D) electromagnetic simulation. The objective of the modeling is to validate the circuit design and component selection as well as predict the conducted emission at the early design stage of the motor drive system. This model is useful to save time and cost of design iteration for any power electronic converter used in industrial applications. In this study, the main sources of conducted emissions of a power inverter along with a layout of complex geometry are identified. Then, analytical study along with circuit and FE-based electromagnetic simulation is used to implement the model of the motor inverter pair. The simulation model considers the board and component parasitic responsible for the common-mode current generation due to pulsewidth modulation switching. The effect of motor housing, harnesses, and chassis structure on common-mode noise generation is presented by the 3-D simulation model that cannot be realized in circuit simulation. The simulation model is validated with the experimental results that showed good correlation.

中文翻译：

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三相电动机控制逆变器的传导发射建模

本文介绍了使用集总参数电路和基于有限元（FE）的三维（3-D）电磁仿真对电机控制逆变器的传导发射进行建模的方法。建模的目的是验证电路设计和组件选择，并预测电动机驱动系统早期设计阶段的传导发射。该模型对于节省工业应用中使用的任何功率电子转换器的设计迭代时间和成本都很有用。在这项研究中，确定了功率逆变器传导辐射的主要来源以及复杂几何图形的布局。然后，结合电路和基于FE的电磁仿真进行分析研究，以实现电机逆变器对的模型。该仿真模型考虑了由于脉冲宽度调制切换而导致共模电流产生的电路板和组件寄生效应。电机外壳，线束和底盘结构对共模噪声产生的影响由3-D仿真模型提供，而该仿真模型无法在电路仿真中实现。实验模型验证了仿真模型的良好相关性。