Novel explosion-prevention thin film capacitor

Abstract

The invention relates to a novel explosion-prevention thin film capacitor, belonging to the field of a capacitor. A "serial-parallel" connection mode is adopted between winding cores, and thus, the influence of winding core breakdown to the capacitor is reduced; energy storage is low by connecting a bypass component in series, and adjacent winding cores are difficult to be damaged during winding core breakdown or a shell is insulated; the heat exchange effect is improved by using heat conduction epoxy resin, heat conduction oil and an arc concave surface, and fault expansion or shell explosion is favorably prevented; with the arrangement of an overvoltage current-limiting device, breakdown caused by too high current in a bypass component circuit is effectively avoided to burn the circuit or explode, and the current and the voltage in the bypass component are ensured to be continuously stable; and with the arrangement of an overvoltage protection device, an electrical component is prevented from impact of overvoltage and high voltage. The capacitor has the advantages of compact structure, low overall loss and low cost, the installation space is saved, the running fault rate is reduced, the quality defect is favorably reduced, and the electrical component is high in capacitor, few in winding core number, high in production efficiency and good in explosion performance.

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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