High-space-utilization power electronic capacitor

Abstract

A power electronic capacitor with high space utilization rate, comprising a capacitor core assembly (2) located in the inner cavity of a housing (3) and a two-pole electrode assembly (1), the electrode assemblies (1) of each pole include capacitor cores The electrical connecting wires (5) connected to the gold-sprayed layer at one end and the electrode leads (6) connected to these electrical connecting wires, the capacitor core assembly (2) is composed of a plurality of capacitor cores, and between each capacitor core and The gap perfusion filling layer (4) between them and the inner wall of the shell (3) is characterized in that: the capacitor core includes a large capacitor core (7) and a small capacitor core (8), and the small capacitor core ( 8) The space between the major capacitor cores (7). The design reduces the volume and inductance of the capacitor, is beneficial to the heat dissipation of the capacitor, improves the reliability of the capacitor and reduces the cost.

Description

technical field [0001] The invention relates to a power electronic capacitor, especially a power electronic capacitor with high space utilization rate. In the international patent classification table, the classification can belong to H01G4 / 224 and H01G4 / 228. Background technique [0002] Power electronic capacitors commonly used in the market currently have only two electrode leads, which is a relatively simple and convenient way to lead out, but when the current of the ripple component passes through the two electrode leads, the leads of the two electrodes The method will cause this kind of capacitor to generate a large self-parasitic inductance, generally its own inductance is much greater than 100nH, once this kind of capacitor is operated under high-frequency conditions, the temperature rise will be too fast, too high, or even greatly affected its own lifespan. However, since the core of this capacitor adopts non-inductive winding, the self-inductance of a single core ...

AI Technical Summary

Problems solved by technology

[0003] At the same time, power electronic capacitors commonly used in the market are generally used (see image 3 ) is formed by arranging capacitor cores, which is a relatively simple and convenient core arrangement, but this arrangement results in space between cores (see image 3 Middle 12) is very large, and requires a large number of filling layers to fill, and the density of the filling layer is far greater than the density of the core, and it cannot increase the capacity, which reduces the space utilization of power electronic capacitors and increases The weight and cost of power electronic capacitors are very unfavorable to the commercial competition of power electronic capacitors. Therefore, it is very necessary to increase the utilization rate of the space 12 between the cores of power electronic capacitors

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