Digital Active Common Mode EMI Suppression Technique for Switching Converters
Digital Active Common Mode EMI Suppression Technique for Switching Converters
复制标题
开关转换器的数字有源共模 EMI 抑制技术
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Yanli Gao
中科院分区：
文献类型：
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作者：
Yonggao Zhang;Kai Zhang;Jing Zhou;Yong Kang;Yanli Gao
在分析开关变换器共模电磁干扰抑制方法的基础上，提出了一种数字有源共模电磁干扰抑制技术。推挽式有源补偿电路产生与变换器共模噪声电流反相的补偿电流。补偿电路和主电桥的驱动信号传输延迟是否相同将影响共模电流抑制的效果。为了解决这一问题，提出了一种基于模拟退火算法（SAA）的闭环微调系统。搭建了基于TMS 320 F2812的数字式有源电磁干扰抑制系统的单相半桥变换器实验台。实验结果表明，在10 MHz频率范围内，共模电磁干扰可衰减10-15 dB，证明了基于SAA的补偿电路和抑制方法的有效性。它可以有效地改善电力电子变换器的电磁兼容性能。
Based on analyses of common mode (CM) EMI suppression methods for switching converters, a digital active CM EMI suppression technique is present. A push-pull active compensating circuit produces a compensating current with anti-phase relationship to the CM noise current of the converter. Whether driving signals transmission delay of compensating circuit and main bridge are the same or not will impact the effect of CM current suppression. In order to resolve the problem, a fine-tuning system with close-loop control based on simulated annealing algorithm (SAA) is proposed. An experimental bench of single-phase half-bridge converter, which consists of digital active EMI suppression system based on TMS320F2812, is constructed. Experimental results show that the CM EMI can be attenuated by 10-15 dB up to 10 MHz and it proved the compensating circuit and suppression method based on SAA are valid. It can improve EMC performance of power electronic converters effectively.