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如何提高直流稳压电源的工作频率

Source: Time:2021-06-10 22:06:50 views:

若要完成直流稳压电源的低纹波输出,则必需对低频电源纹波采取滤波措施。可采用前级预稳压和增大 DC/DC 变换器闭环增益来消弭,低频纹波抑止的几种常用的办法、加大输出低频滤波的电感,电容参数,使低频纹波降低到所需的指标。
 
高频纹波噪声来源于高频功率开关变换电路,在电路中,经过功率器件对输入直流电压停止高频开关变换然后整流滤波再完成稳压输出的,在其输出端含有与开关工作频率相同频率的高频纹波,其对外电路的影响大小主要和直流稳压电源的变换频率、输出滤波器的构造和参数有关。
 
高频纹波抑止的目的是给高频纹波提供通路,常用的办法有以下几种、进步直流稳压电源工作频率,以进步高频纹波频率,有利于抑止输出高频纹波、加大输出高频滤波器,能够抑止输出高频纹波。

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