liweicheng85 发表于 2025-6-27 17:34

PFC电感计算(CCM模式)

本帖最后由 liweicheng85 于 2025-6-27 17:38 编辑

1,确定输出电压
±   
输出电压一般是输入最高峰值电压的1.05~1.1倍,
输出电压高于输入最高电压的峰值。最高峰值电压:data:image/png;base64,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

2,设计要点:电感在最大电流时避免饱和,最大电流发生在输入电压最低,输出功率最大时。
最大输入电流:



3,确定工作频率

4,确定最低输入电压峰值时的最大占空比

输出电压 太低,在最高输入电压峰值时占空比非常小,
由于功率开关管的开关时间限制,
可能输入电流不能跟踪输入电压,造成THD加大。
5,一般情况下,电感中的纹波电流等于峰值电流的20%



6,利用AP法选择磁芯尺寸




j是电流密度

7,计算匝数







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