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脉冲负载时会有声音,是否正常产生的原因是什么

Source: Time:2020-06-08 17:16:22 views:

脉冲负载通常会产生声音。大多数情况下,由于人耳的频率是几百Hz到20kHz的音频频率时,当脉冲负载的频率落到这个范围内时,人耳就会听到声音。声音是由电源内部的电感线圈产生。具体由流过线圈的脉冲电流产生的磁场引起的磁芯振动产生声音。如果电流流过磁体,则磁芯被磁化。然后,如果电流改变,则磁体产生伸缩。这是磁体膨胀和收缩的现象。空气因这种现象而振动,发出声音。但电特性没有问题。
解决方法:
1.将外部LC滤波器组装到电源输出端,电源的声音将会减少。
2.磁芯点胶,整体灌封。

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