摘要
三相电磁干扰滤波器的性能会由于差、共模噪声的转换而降低,文中揭示脉宽调制(pulse width modulation,PWM)逆变器中因滤波元件参数不对称而引起的噪声转换机理。通过分别对不平衡电容和电感开展噪声转换的行为模型研究,并结合PWM策略的差、共模谐波分布规律研究,提出评估差、共模噪声转换程度的方法。此外,以常见的LC滤波拓扑为例进行分析与实验验证,结合商用滤波元件公差参数开展讨论与选型建议,发现在LC滤波拓扑中电容的公差参数相较于电感而言更为敏感,实验结果验证了所提理论分析的正确性。
The performance of a three-phase electromagnetic interference(EMI) filter will be degraded due to noise mode conversions. This paper revealed the noise conversion mechanism caused by the asymmetry of the filter components in the pulse width modulation(PWM) inverter.Moreover, through the study of the noise conversion behavior model of unbalanced capacitors and inductors, combined with the study of the difference mode and common mode harmonic distribution of PWM, this paper proposed a method to evaluate the degree of noise conversions, and took the LC filter topology as an example for analysis and experimental verification. Based on the commercial filter components tolerance parameters, this paper proposed the selection suggestions. It can be found that the tolerances of the capacitors in the LC filter are more sensitive than the inductors.The experimental results fit the analysis very well.
作者
王安宇
周阳
郑峰
路璠
WANG Anyu;ZHOU Yang;ZHENG Feng;LU Fan(Mechanical and Electrical Engineering,Xidian University,Xi’an 710065,Shaanxi Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2022年第7期2681-2691,共11页
Proceedings of the CSEE
基金
国家自然科学基金项目(51077106)。
关键词
电磁干扰
脉宽调制逆变器
滤波器
模态转换
不对称
electromagnetic interference(EMI)
pulse width modulation(PWM)inverters
filters
mode transformation
unbalance