| 反激式变换器共模EMI抑制研究 |
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| 引用本文： | 董纪清. 反激式变换器共模EMI抑制研究[J]. 电气开关, 2007, 45(6): 19-21 |
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| 作者姓名： | 董纪清 |
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| 作者单位： | 福州大学电气工程与自动化学院,福州,福建,350002 |
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| 摘 要： | 分析了反激式变换器的噪声模型,根据原、副边的噪声回路特点,提出利用反激式变换器的辅助绕组改变变压器内的电位分布以调整其内部分布电容,从改变噪声通路阻抗的角度调整原、副边噪声平衡,实现共模噪声抑制.以一台50W反激式变换器为平台对分析结果进行了实验,实验结果验证了分析的正确性.
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| 关 键 词： | 反激式变换器 分布电容 辅助绕组 共模EMI抑制 |
| 文章编号： | 1004-289X（2007）06-0019-03 |
| 收稿时间： | 2007-08-22 |
| 修稿时间： | 2007-08-22 |
Research on CM EMI Noise Suppression in Flyback Converter |
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| DONG Ji-qing. Research on CM EMI Noise Suppression in Flyback Converter[J]. Electric Switchgear, 2007, 45(6): 19-21 |
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| Authors: | DONG Ji-qing |
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| Abstract: | CM noise characteristic of flyback converter is analyzed. A new solution which uses auxiliary winding to raise the potential of shielding is proposed to regulate the stray capacitance in the transformer. The CM EMI noise can be banlanced between primary and secondary by impedance adjustment. The experiment is carried based on a 50 W flyback converter and the experimental result has verified the validity of new solution. |
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| Keywords: | flyback converter stray capacitance auxiliary winding CM EMI suppression |
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