Input Differential-Mode EMI of CRM Boost PFC Converter
Input Differential-Mode EMI of CRM Boost PFC Converter
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DOI：
10.1109/tpel.2012.2206612
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发表时间：
2013-03
影响因子：
6.7
通讯作者：
Fei Yang;X. Ruan;Qing Ji;Z. Ye
中科院分区：
文献类型：
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作者：
Fei Yang;X. Ruan;Qing Ji;Z. Ye
分析了一种工作在临界电流模式下的单相Boost功率因数校正变流器的差模电磁干扰噪声。根据EMI接收机的数学模型，计算了DM噪声频谱，得到了DM滤波器所需的转角频率。可以看出，最小转角频率由150 kHz处的最大噪声决定。根据电感电流纹波大小与DM噪声的关系，通过对150 kHz下电流纹波大小的分析，得到了150 kHz下的噪声特性，从而找出了噪声最大的最坏情况。同时，不同输入电压下150 kHz处的最大噪声是相同的，因此可以根据一个输入电压下的一个最差频谱来设计DM滤波器，而不需要在其他条件下测试频谱。
In this paper, the differential-mode (DM) electromagnetic interference (EMI) noise of a single-phase boost power factor correction converter operating in critical current mode was analyzed. The DM noise spectra are calculated based on the mathematical model of EMI receiver and the required corner frequencies of DM filter are obtained. It can be seen that the minimum corner frequencies are determined by the maximum noises at 150 kHz. With the relation between the magnitude of the inductor current ripple and the DM noise, the characteristics of noise at 150 kHz are obtained by analyzing the current ripple magnitude at 150 kHz; thus, the worst conditions which have the maximum noise value are figured out. Meanwhile, the maximum noises at 150 kHz for different input voltages are identical, so the DM filter can be designed based on one worst spectrum at one input voltage without testing the spectra in other conditions.