中国电机工程学报Issue(24)：32-41,10.
电流临界连续模式Boost PFC变换器最恶劣传导电磁干扰频谱分析
Worst Conducted EMI Spectrum of the Critical Conduction Mode Boost PFC Converter
季清 1阮新波 1叶志红2
作者信息
- 1. 航空电源航空科技重点实验室 南京航空航天大学,江苏省 南京市,210016
- 2. 光宝科技股份有限公司,江苏省 南京市,210019
- 折叠
摘要
Abstract
The switching frequency of the Boost PFC converter in critical conduction mode varies in a line cycle. As a result, the conducted EMI spectra is difficult to be diagnosed, which makes the design on EMI filter complicated. By analyzing the harmonic spectrum of the voltage across the drain and source of the power switch, effect of the varied switching frequency on the peak, quasi-peak and average conducted EMI spectra of the CRM boost PFC converter was revealed. It is indicated that the fundamental harmonic dominates the low frequency noise of the conducted EMI spectrum. Based on the relationship between the duty cycle and the fundamental harmonic amplitude of the voltage across the power switch, the input voltage and load condition for the worst case of the conducted EMI spectrum of the CRM boost PFC converter was derived. It is demonstrated that the worst spectrum in the condition is identical. The theoretical analysis was verified by the experiment results.关键词
传导电磁干扰/EMI频谱/EMI滤波器/功率因数校正/电流临界连续模式Key words
conducted electromagnetic interference (EMI)/EMI spectrum/EMI filter/power factor correction (PFC)/critical conduction mode分类
信息技术与安全科学引用本文复制引用
季清,阮新波,叶志红..电流临界连续模式Boost PFC变换器最恶劣传导电磁干扰频谱分析[J].中国电机工程学报,2013,(24):32-41,10.
