A metal film filter capacitor for frequency converter

A filter capacitor and metal film technology, applied in the field of filters, can solve problems such as lifespan, and achieve the effects of long service life, high breakdown electric field strength, and low dielectric loss
CN105826075BActive Publication Date: 2018-09-18东莞怡德电子有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
东莞怡德电子有限公司
Publication Date
2018-09-18

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Abstract

The invention provides a metal thin film filtering capacitor for a frequency converter. The filtering capacitor includes a core assembly which is formed by wrapping at least one group of thin film layer which includes a double face metallization polypropylene thin film or a double face metallization polyester thin film and a medium layer, wherein the double face metallization polypropylene thin film or the double face metallization polyester thin film is provided with a metal layer separately on the upper face and the lower face of the polypropylene thin film or the polyester thin film, and one metal layer is an aluminum metal layer and the other metal layer is a zinc metal layer. The filtering capacitor also includes an encapsulated layer which is wrapped in the peripheral side of the core assembly. The filtering capacitor further includes a pin which is connected to the core assembly and extends beyond the encapsulated layer. According to the invention, the metal thin film filtering capacitor for the frequency converter is characterized by high breakdown electric field intensity, long service life, and excellent self-healing property.
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Description

technical field

[0001] The invention relates to the field of filters, in particular to a metal film filter capacitor for frequency converters. Background technique

[0002] Capacitors, usually referred to as capacitance for their ability to hold charges; capacitors, as the name implies, are "charged containers", which are devices that hold charges. Capacitors are one of the electronic components widely used in electronic equipment and are widely used in circuits. DC blocking, coupling, bypass, filtering, tuning loop, energy conversion, control, etc.

[0003] The main function of filter capacitors for inverters is filtering. Theoretically (that is, assuming that the capacitor is a pure capacitor), the larger the capacitor, the smaller the impedance and the higher the passing frequency. But in fact, most capacitors exceeding 1μF are electrolytic capacitors, which have a large inductance component, so the impedance will increase when the frequency is high. Sometimes it is se...

Claims

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