High-power power electronic capacitor for elastic connection among core sets and copper bars

Abstract

The invention relates to a high-power power electronic capacitor for elastic connection among core sets and copper bars. The high-power power electronic capacitor comprises a cover plate assembly, an outer shell and the core sets. The core sets are fixed in the outer shell, leading-out copper strips are arranged on the two metal sprayed faces of each core set respectively, and bent leading-out electrodes are arranged at the upper ends of the leading-out copper strips and used for being electrically connected with leading-out terminals of the cover plate assembly through welding. Elastic conducting plates are arranged on the leading-out copper strips and extend to all capacitor core metal sprayed faces of the core sets, and the tail end of each elastic conducting plate is electrically connected with the corresponding capacitor core metal sprayed face through the welding. The core sets are connected with the leading-out copper strips in an elastic mode. The force, adhering to the elastic conducting plates, of welding points is strengthened. The situation that the leading-out copper strips have sufficient properties of current passing can be guaranteed, and in addition, the situation that the displacement of the core sets causes the welding points to be strained can be eliminated, so that the welding points are not prone to loosening and disengaging.

Description

technical field [0001] The invention relates to a high-power power electronic capacitor, in particular to a high-power power electronic capacitor in which a core group and a copper row are elastically connected. Background technique [0002] At present, for high-power power electronic capacitors using cylindrical capacitor cores, one or more sets of core groups are arranged in the casing, and each set of core groups is arranged side by side with one or two rows of capacitor cores, and each row of capacitor cores is composed of multiple cylinders. Shaped capacitor cores are stacked up and down; each group of cores is equipped with lead-out copper strips on the gold-sprayed surface on both sides, and each capacitor core of the two rows of capacitor cores passes through the solder joints on the gold-sprayed surface on both sides of the lead-out copper strips. electrical connection. This kind of core group has a large number of capacitor cores, and the solder joints on the lead...

AI Technical Summary

Problems solved by technology

Therefore, during welding, the lead-out copper strip will be deformed due to welding stress, and because the core set is large in size and heavy in weight, the vibration during the transportation, installation and use of the capacitor will inevitably cause the displacement of the core set. This kind of displacement is very likely to strain the rigid solder joints that lead out the copper strip and the gold-sprayed surface, causing the solder joints that lead out the copper strips to loosen or fall off, especially the solder joints at the places where the welding stress is concentrated, resulting in its over-current performance being affected. damage

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