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Home » News » industry information » Why do manufacturers now choose film capacitors (I)?

Why do manufacturers now choose film capacitors (I)?

Views: 0     Author: Site Editor     Publish Time: 2018-08-16      Origin: Site

Early DC support film capacitors used electrolytic capacitors. With the development of thin film capacitor technology, especially the development of the base film technology and the use of segmentation technology for metallization, not only the volume of the film capacitor is becoming smaller and smaller. The product's withstand voltage level has remained at a considerable level, and now more and more companies use high-temperature polypropylene film capacitors as DC support capacitors. And why are more manufacturers now switching to film capacitors?

 

1. The frequency characteristics are stable and the high frequency characteristics of the product are good.

At present, most of the controllers have a switching frequency of about 10 kHz, which requires high frequency performance of the product. This requirement is a problem for electrolytic capacitors and polyester film capacitors.

 

2, the film capacitor can withstand reverse voltage

The electrode of the film capacitor is a nano-scale metal evaporated on the film. The product is non-polar, so it is very convenient for the user, and does not need to consider the problem of the positive and negative electrodes. For the electrolytic capacitor, if it exceeds 1.5 When the reverse voltage of the double Un is applied to the electrolytic capacitor, it causes a chemical reaction inside the capacitor. If this voltage continues for a long enough period of time, the capacitor will explode or the electrolyte will flow out as the internal pressure of the capacitor is released.


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