一种新的电路内阻抗建模方法和SMPS的变化特征分析
Jun Zhan1, Ziliang Zhang1, Rongxuan Zhang1
1College of Automation Engineering, School of Automation, Nanjing University of Aeronautics and Astronautics (NUAA), Nanjing 211106, China.
本研究提出了一种用于模拟开关模式电源 (SMPS) 电路内阻抗的新方法. 新模型准确预测阻抗变化,有助于设计电磁干扰 (EMI) 过器.
科学领域:
- 电气工程 电气工程
- 电磁学 电磁学 电磁学 电磁学
- 电力电子 电力电子 电力电子
背景情况:
- 精确的电路内阻抗提取对于设计切换模式电源 (SMPS) 的有效电磁干扰 (EMI) 过器至关重要.
- 现有的文献广泛涵盖了基于电路内阻抗的EMI过器设计,但SMPS电路内阻抗的动态变化特征仍未得到充分研究.
研究的目的:
- 提出一种基于感应合方法的SMPS电路内阻抗建模的新方法.
- 揭示SMPS电路内阻抗的变化特征,并为EMI抑制措施提供指导.
主要方法:
- 开发了一种使用感应合方法的新型电路内阻抗建模方法.
- 导出了一个准确的模型,将电路内阻抗与外部阻抗,模态阻抗和切换模式比例相关联.
- 通过模拟和实验测量从10kHz到30MHz验证了模型.
主要成果:
- 衍生模型准确地描述了SMPS电路内阻抗,显示了计算结果和模拟结果之间的良好一致.
- 实验验证证了模型的准确性,振幅偏差在3dB以内,相位偏差在6度以下.
- 该研究揭示了SMPS电路内阻抗的关键变化特征.
结论:
- 建议的感应合方法为设计有效的EMI抑制策略提供了定量基础.
- 这种方法可以更精确地优化EMI过器在广泛的频率范围内.
- 了解和建模SMPS电路内阻抗变化对于先进的电力电子系统设计至关重要.
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