| 引用本文: | 杨再学,刘斌,孔繁镍,张尧,梁倩,陈延明.基于分布变换+时间压缩的洛伦兹扩频CM EMI抑制策略[J].电力自动化设备,2025,45(4):118-124,152 |
| YANG Zaixue,LIU Bin,KONG Fannie,ZHANG Yao,LIANG Qian,CHEN Yanming.CM EMI suppression strategy in Lorenz spread spectrum based on distribution transformation and time compression[J].Electric Power Automation Equipment,2025,45(4):118-124,152 |
|
| 摘要: |
| 为了解决洛伦兹混沌扩频调制性能不佳的问题，结合了分布变换和时间压缩技术提出一种创新策略。利用时间压缩来优化局部频谱特性，通过扩展谱线宽度，实现了连续频谱的生成，有效降低了谱峰值。通过分布变换对功率谱进行均匀化整形，进一步降低了谱峰值。为了验证所提策略的有效性，搭建一台反激变换器实验样机并进行实测。实验结果表明：采用所提策略的实测功率谱分布均匀；与蔡氏混沌扩频相比，所提策略在抑制共模(CM)传导电磁干扰(EMI)方面表现更佳，性能提升超过3 dB。 |
| 关键词: EMI抑制 混沌扩频调制 洛伦兹系统 时-频分析 时间压缩 分布变换 频谱整形 均匀分布 |
| DOI：10.16081/j.epae.202409015 |
| 分类号:TM46 |
| 基金项目:国家自然科学基金资助项目(52377172)；广西自然科学基金资助项目(2021GXNSFAA220136) |
|
| CM EMI suppression strategy in Lorenz spread spectrum based on distribution transformation and time compression |
|
YANG Zaixue, LIU Bin, KONG Fannie, ZHANG Yao, LIANG Qian, CHEN Yanming
|
|
Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 530004, China
|
| Abstract: |
| To overcome the challenge of inadequate performance in Lorenz chaotic spread spectrum modulation, an innovative strategy that integrates distribution transformation and time compression techniques is proposed. The time compression is employed to optimize local spectral characteristics, the generation of a continuous spectrum is realized by extending the spectral linewidth and effectively reducing spectral peaks. The distribution transformation is utilized to uniformly shape the power spectrum, further decreasing spectral peaks. To validate the effectiveness of the proposed strategy, a prototype of a flyback converter is deve-loped and tested. Experimental results demonstrate that the measured power spectrum with the proposed strategy is uniformly distributed. Compared to Chua’s chaotic spread spectrum, the proposed strategy exhi-bits superior performance in suppressing common-mode conducted electromagnetic interference, achieving a performance enhancement of over 3 dB. |
| Key words: EMI suppression chaotic spread spectrum modulation Lorenz system time-frequency analysis time compression distribution transformation spectrum shaping uniform distribution |
