中国电机工程学报2016，Vol.36Issue(15)：4232-4241,10.DOI:10.13334/j.0258-8013.pcsee.151799
计及PWM变换器传输线分布参数模型的宽频建模机理研究
Mechanism Study on Wideband Modeling of Transmission Lines Considering Distributed Parameters for PWM Converters
摘要
Abstract
The multiconductor transmission line is the key factor to generate voltage reflection and to intensify electromagnetic interference for PWM converters. In order to study voltage reflection suppression rules and EMI estimation, to set up an equivalent MTL model with easy numerical computation is the main point to precisely describe transmission characteristics. The lumped parameter model based on Kirchhoff Law doesn’t accurately illustrate MTL’s high-frequency features with the impact of frequency parameter variation and skin effect, the frequency-dependent distributed parameter model by the partial element equivalent circuit method under the TEM propagation mode is employed. For obtaining precise distributed parameters in the high- frequency equivalent model, the calculation formula of parasitic partial capacitors by the Neumann Rule and the mirror image method was derived, in which grounding circuit’s impact on common mode interference was also considered. In view of the influence of skin and proximity effects on MTL’s current distribution density, aRL ladder equivalent model based modified vector fitting with iteration computation of rational function approximation via poles and residues was adopted to eliminate residual errors of least-squares and to realize stable convergence. Based on simulation and experimental results, the proposed equivalent MTL model reflects its distributive features, and provides theoretical guidance for EMC mechanism study of PWM converter systems with effectiveness and accuracy.关键词
宽频建模/PWM变换器/传输线分布参数/部分元等效/向量拟合/镜像法Key words
wideband modeling/PWM converter/distributed transmission line model/partial element equivalent circuit/vector fitting/mirror image method分类
信息技术与安全科学引用本文复制引用
孙强,魏克新,王莎莎,梁斌,高成海..计及PWM变换器传输线分布参数模型的宽频建模机理研究[J].中国电机工程学报,2016,36(15):4232-4241,10.基金项目
国家自然科学基金(50977063)；国家高技术研究发展计划(863计划)(2013BAG01B00)。Project Supported by the National Natural Science Foundation of China (50977063) （50977063）
The National High Technology Research and Development Program of China (863 Program)(2013BAG01B00) （863 Program）
