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采用耦合电感的交错并联电流临界连续BoostPFC变换器输入差模EMI分析

, PP. 202-214

Keywords: 电流临界连续模式,交错并联,耦合电感,EMI滤波器

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Abstract:

对采用耦合电感的两路交错电流临界连续模式BoostPFC变换器的前级差模传导电磁干扰(EMI)进行分析。首先给出了变换器输入电流的脉动幅值和频率表达式,分析了脉动电流谐波幅值的变化,然后通过接收机数学模型计算出传导差模干扰频谱,并分析其变化规律,确定了最恶劣频谱出现的条件。依据数学上电流脉动幅值和干扰值的关系,提出一种计算最恶劣的干扰频谱出现条件的方法。最后通过实际测试验证了分析。

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