Frequency domain EMI-simulation and resonance analysis of a DCDC-converter
Frequency domain EMI-simulation and resonance analysis of a DCDC-converter
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DCDC 转换器的频域 EMI 仿真和谐振分析
DOI：
10.1109/emceurope.2016.7739186
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
J. Hansen
中科院分区：
文献类型：
--
作者：
P. Hillenbrand;M. Bottcher;S. Tenbohlen;J. Hansen
本文提出了一种频域模型来预测转换器引起的传导电磁干扰 (EMI)。在该模型中，转换器的非线性和时变半导体开关被由转换器运行期间的测量表征的电压源取代。提出了一种矢量网络分析仪 (VNA) 测量方法来表征从电压源到线路阻抗稳定网络 (LISN) 的干扰路径。该方法表明，LISN 处的骚扰电压的主要谐振是由线性且时不变的耦合路径引起的。基于这些知识，执行耦合路径的频域仿真。仿真很好地再现了测量的耦合路径。基于对选定谐振频率下的电磁势的分析，设计了一种电路，可以准确描述转换器的 EMC 根本原因。
This paper proposes a frequency domain model to predict conducted electromagnetic interferences (EMI) caused by a converter. In the model, the nonlinear and time-variant semiconductor switches of the converter are replaced by voltage sources characterized by measurements during operation of the converter. A vector network analyzer (VNA) measurement method is presented to characterize the disturbance path from the voltage sources to the line impedance stabilization network (LISN). The approach shows that the main resonances of the disturbance voltage at the LISN are caused by the coupling path, which is linear and time-invariant. Based on this knowledge, a frequency domain simulation of the coupling path is performed. The simulation reproduces the measured coupling path very well. Based on the analysis of the electromagnetic potential at selected resonance frequencies, an electrical circuit is designed that accurately describes EMC root-causes of the converter.