Does voltage and current have an impact on power supply filters?

December 16, 2022
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Whether voltage and current influence the power supply filter?

 

The power filter is a low-pass filter circuit composed of inductors and capacitors. It allows DC or 50Hz current to pass through, and attenuates the interference signals with higher frequencies. Because the interference signal has two kinds of differential mode and common mode, so the power filter should attenuate both kinds of interference.

 

The main index of power filter

 

When we choose the power filter, we should mainly consider three indicators; The first is voltage/current, the second is insertion loss, and the last is structure size. Since the inside of the filter is generally potting, environmental characteristics are not the main problem. However, the temperature characteristics of all potting materials and filter capacitors have certain influence on the environmental characteristics of power filter.

 

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