Dec. 10, 2021
A film capacitor is a capacitor in which metal foil is used as an electrode, and plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate are overlapped from both ends and then wound into a cylindrical structure. This article will talk about the role of film capacitors in many fields and what you need to pay attention to in use.
The Role Of Film Capacitors In Many Areas:
①When the device is used in a resonant converter, it can achieve resonance together with the inductor.
② Film capacitors are used in power electronic circuits mainly to buffer and clamp the power current, resonant bypass, and suppress the electromagnetic interference of the power supply.
③When the film capacitor is used as a bypass, it mainly plays a role in reducing the impedance of the DC bus and absorbing the ripple current from the load, thereby effectively suppressing the fluctuation of the DC bus voltage due to a sudden load change.
What to pay attention to when using film capacitors:
①Pay attention to the operating environment temperature. Because too high operating temperature will cause the electrochemical reaction of the film capacitor to intensify and affect the heat dissipation during self-healing, it will cause self-healing failure or shorten the service life. Therefore, when installing the film capacitor, avoid heat sources and improve heat dissipation and ventilation. environment.
②The rated voltage of the film capacitor must be in line with the voltage of the local power grid. For some power grids with excessive voltage or harmonics, due to high-order harmonics, especially the third, fifth, and seventh harmonics, the energy is large. The hazards are also relatively strong, and measures should be taken to avoid and isolate them during configuration.
The above content is about the role and precautions of the application of film capacitors. When purchasing film capacitors, you must choose a regular manufacturer.
Dongguan Zhixu Electronic Co., Ltd. (also JYH HSU(JEC)) has a full range of varistor and capacitor models with guaranteed quality. JEC has passed ISO9001:2015 quality management system certification; JEC safety capacitors (X capacitors and Y capacitors) and varistors have passed national certifications of the main industrial powers across the world; JEC ceramic capacitors, film capacitors and super capacitors are in compliance with environmental protection indicators. We have over 30 years of manufacturing experience. If you have technical questions or need samples, please contact us.
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