New explosion-proof film capacitor

Abstract

The invention relates to a new type of explosion-proof film capacitor, which belongs to the field of capacitors. The connection mode of "serial first and then parallel" is adopted between winding cores to reduce the influence of winding core breakdown on capacitors; It is not easy to damage the adjacent winding core or insulate the shell; use heat-conducting epoxy resin, heat-conducting oil, and arc-shaped concave surface to improve the heat exchange effect, which is beneficial to prevent the expansion of the fault or the explosion of the shell; The circuit is burned or exploded due to the breakdown caused by the excessive current, so as to ensure the continuous stability of the current and voltage in the bypass components; the overvoltage protection device protects the electrical components from the impact of overvoltage and high voltage. The capacitor has a compact structure, saves installation space, reduces operating failure rate, lower overall loss, and lower cost, which is conducive to reducing manufacturing quality defects; the capacity of electrical components is large, the number of winding cores is small, the production efficiency is high, and the explosion-proof performance is good.

Description

technical field [0001] The invention relates to a film capacitor, in particular to a novel explosion-proof film capacitor. Background technique [0002] The power equipment manufacturing industry generally includes four sub-sectors: power generation equipment industry, power transmission and transformation primary equipment industry, secondary equipment industry, and power environmental protection industry. The development of the electric power equipment industry relies on the development of the electric power industry, and the scale and direction of electric power investment directly affect the development of the electric power equipment industry. [0003] Film capacitor, a capacitor used in power systems and electrical equipment. Film capacitors include shunt capacitors, AC filter capacitors and series capacitors. Since the core solid insulating medium in any film capacitor has local quality defects such as voids, cracks or conductive impurities, the defect forms an elec...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that after the fuse is blown, the circuit in the electrical component is in an open circuit, resulting in the capacitor not working properly.

Moreover, high-power film capacitors tend to accumulate a lot of heat after long-term continuous use or long-term over-current use or long-term over-voltage use. The existing capacitors have poor heat dissipation performance due to the pursuit of compact structure, and the capacitor shell is easy to Due to overheating, expansion and deformation, the mechanical properties of the shell are further deteriorated. When the electrical components inside the capacitor are over-current or over-voltage, the components are broken down, a large amount of gas is generated, and the mechanical properties of the shell are deteriorated, prone to explosion accidents, and the explosion-proof performance is poor

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