High-voltage pulse capacitor

Abstract

The invention relates to a high-voltage pulse capacitor. The high-voltage pulse capacitor comprises a shell, a capacitor core group and an electrode, wherein a lower epoxy resin layer, an insulating layer which completely covers the capacitor core group, a fixing sleeve and an upper epoxy resin layer are successively arranged in the shell from bottom to top; the bottom of the capacitor core group is fixedly connected with the bottom of the shell through the lower epoxy resin layer; a mounting hole which is matched with the electrode is formed in the fixing sleeve; the top of the upper epoxy resin layer is parallel and level to the top of the shell; and the upper epoxy resin layer is fixedly connected with the shell. The high-voltage pulse capacitor is simple in manufacturing process, on the premise of guaranteeing voltage resistance and penetration resistance of the capacitor, airtightness of sealing of the shell is remarkably improved, sealing cost is low, and safety is high. The high-voltage pulse capacitor is good in heat dissipation property, heat generated by the capacitor core group can be dissipated outwards in time through the insulating layer, airtightness of sealing is prevented from being affected by heat, the implementing effect is good, and application value is high.

Description

technical field [0001] The invention relates to a high-voltage pulse capacitor and belongs to the technical field of capacitors. Background technique [0002] The pulse capacitor can store the charging energy of a small power supply to the capacitor in a long time interval, and release the stored energy quickly in a very short time interval at a certain moment of need, forming a strong inrush current and powerful impact power. It uses metallized polypropylene film as the medium, and is sealed with high-voltage insulating material to insulate the shell. It has excellent electrical performance, good reliability, high temperature resistance, small size, large capacity and good self-healing performance. [0003] Usually, the voltage range of high-voltage pulse capacitors is 1000~14000V, which is composed of shell, capacitor core group, electrode, cover plate and insulating oil. The insulating oil can be castor oil, which is used to wrap the capacitor core group, so that the ca...

AI Technical Summary

Problems solved by technology

However, the existing high-voltage pulse capacitors have oil leakage at the electrodes and the shell is not well sealed, so the product qualification rate is limited; if the insulating oil is replaced by epoxy resin to encapsulate the capacitor core group, although there is no oil leakage, due to environmental Oxygen resin has high viscosity and poor wettability, and the use of epoxy resin cannot fill the tiny gaps in the capacitor core group. Compared with capacitors using insulating oil, the withstand voltage and breakdown resistance of capacitors packaged with epoxy resin are significantly reduced; and, using ring Capacitors encapsulated in epoxy resin will become poorly sealed at high temperatures, which will affect the use of capacitors

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