Oil-immersed water-cooled high-power electric and electronic capacitor

Abstract

The invention relates to an oil-immersed water-cooled high-power electric and electronic capacitor, which consists of a shell, a capacitor core set and a cover plate. A cooling device is arranged at a gap between the capacitor core set and the shell; a cover plate assembly is provided with a cooling water inlet interface and a cooling water outlet interface which are connected with an external cooling water pipe; and two ports of the external cooling device are respectively communicated with the water inlet interface and the water outlet interface on the cover plate assembly. When the capacitor works, heat produced by the capacitor is dissipated in the form of heat radiation and heat produced inside the capacitor is brought away when external cooling water flows through the capacitor through the interface on the cover plate assembly, so internal temperature rise of the capacitor can be reduced and a temperature upper limit in the working environment of the capacitor is provided. The invention has the advantages of enhancing overcurrent capability of the capacitor, prolonging the service life of the capacitor, reducing the volume of the capacitor and lowering the manufacturing costof the capacitor.

Description

technical field [0001] The invention relates to an oil-immersed high-power power electronic capacitor. Background technique [0002] At present, the high-power power electronic capacitors commonly used in the market are all oil-immersed capacitors, which adopt an oil-immersed natural cooling structure. When a large current flows through the capacitor, the heat generated by the capacitor is dissipated into the surrounding air in the form of heat radiation. . Considering the internal temperature rise of the capacitor, the upper limit of its working environment temperature is 70°C, and the overcurrent capability of the capacitor is limited. Under the action of high current, the calorific value is large, and the temperature rise of the capacitor is too high, causing the shrinkage and deformation of the film inside the capacitor, causing a large amount of gas and heat to be generated in the film, which will eventually lead to expansion and deformation of the capacitor, causing e...

AI Technical Summary

Problems solved by technology

Considering the internal temperature rise of the capacitor, the upper limit of the working environment temperature is 70°C, and the overcurrent capability of the capacitor is limited

Under the action of high current, the calorific value is large, and the temperature rise of the capacitor is too high, causing the shrinkage and deformation of the film inside the capacitor, causing a large amount of gas and heat to be generated in the film, which will eventually lead to expansion and deformation of the capacitor, causing early failure, and serious damage. Explode the terminals of the capacitor, causing personal and property damage

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