Filter film capacitor

The filter capacitor is an energy storage device installed at both ends of the rectifier circuit to reduce the AC ripple ripple coefficient and increase the smooth DC output. Since the filter circuit requires the storage capacitor to have a large capacitance. In all circuits that need to convert AC power to DC power, setting the filter film capacitor will make the performance of the electronic circuit more stable, and also reduce the interference of the alternating ripple ripple on the electronic circuit.

The filter film capacitor is connected in parallel to the output end of the rectification power supply circuit to reduce the AC ripple ripple coefficient and smooth the DC output, which not only makes the DC output of the power supply smooth and stable, but also reduces the influence of the alternating ripple current on the electronic circuit, and also absorbs the electronic circuit. The current fluctuations generated during operation and the interference caused by the AC power supply make the performance of the electronic circuit more stable.

The filter film capacitor is used in the power rectifier circuit to filter out the AC component and make the output DC smoother. Moreover, for the circuit, this time, a combination of parallel capacitor circuits is often used to improve the working effect of the filter film capacitor. The low-frequency filter film capacitor is mainly used for filtering after mains filter or transformer rectification, and its working frequency is 50Hz consistent with the mains; the high-frequency filter film capacitor mainly works after the rectification of the switching power supply, and its working frequency is several thousand Hz. Up to tens of thousands of Hz, the filter film capacitor plays a very important role in the switching power supply.