Ceramic dielectric annular capacitor

Abstract

The invention relates to a ceramic dielectric annular capacitor. The capacitor comprises a dielectric ceramic body 1 which has a cylindrical structure with a middle through hole, and is characterized by also comprising an inner lead ring 2 arranged on the inner ring surface of the dielectric ceramic body, and an outer lead ring 3 arranged on the outer side surface of the dielectric ceramic body, wherein the inner lead ring 2 and the outer lead ring 3 are isolated and staggered from each other, and an insulation section is formed between the inner lead ring 2 and the outer lead ring 3; and a clamping groove 4 is formed at the bottom of the inner ring surface of the dielectric ceramic body 1. The capacitor effectively solves the problem that the influence of a distance between pole plates of a cylindrical high-voltage ceramic capacitor on capacity and a creepage distance is mutually exclusive, has the function of shielding an electric field of a central cavity while the volume utilization rate of a sensor is improved, has small volume and a compact structure and is convenient and practical.

Description

technical field [0001] The invention relates to a capacitor, in particular to a ceramic dielectric ring capacitor. Background technique [0002] Ceramic high-voltage capacitors are power sensing elements commonly used in high-voltage AC circuits. Because usually the high-voltage capacitor is in the shape of a cylinder, and the capacitor plates are on two opposite circular planes. When designing the distance between the plates, there is a contradictory choice in satisfying a larger creepage distance and a larger capacitance value: in order to make the creepage distance between the plates long enough, enough cylinders should be designed Height, but the higher the height of the cylinder, the farther the distance between the plates will be, resulting in a smaller capacitance value. At the same time, it also makes the capacitor cooperate with other components, and the utilization efficiency of the space volume is low. The above defects put forward new requirements for the devel...

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Problems solved by technology

At the same time, the capacitor is also matched with other components, and the utilization efficiency of the space volume is low. The above defects put forward new requirements for the development and improvement of the capacitor.

For example, the ring capacitor 0820179476.6 adopts a ring three-dimensional structure, but both electrodes are on the inner ring surface, which cannot solve the contradiction between the volume size of the capacitor material and the creepage distance between the two electrodes and the capacitor capacity, and cannot be adapted to high-voltage power-taking occasions

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