Metal winding of transformer covered with glue and method of wrapping it

Abstract

The invention relates to a rubber-coated metal winding of a transformer and a rubber-coating method thereof. In the invention, metal coils that can be stacked and assembled are formed by stamping metal sheets in a plane spiral manner, and the formed metal windings are increased by stacking and welding the metal coils. The number of turns, and the metal winding of the transformer is formed by injection molding the metal winding at least twice, which solves the problem that the metal winding is difficult to position in the mold, and solves the problem of the existing rubber-coated metal winding. The product is not resistant to high voltage; since the rubber-coated metal winding of the transformer is injection-molded with at least two layers of plastic, it has good insulation performance, can withstand high temperature and high pressure, and has good safety performance to meet the needs of transformers. Requirements and safety requirements of UL60950.

Description

technical field [0001] The invention relates to the technical field of metal winding wrapping, in particular to a transformer wrapping metal winding capable of withstanding high voltage and a wrapping method thereof. Background technique [0002] At present, it is rare to see rubber-coated spiral metal windings used in transformers, because most of the rubber-coated metal products on the market are low-voltage or lower than 380 volt products, and basically most of the current plastic-coated metal products have no temperature. Grade requirements, so it cannot meet the high temperature and high voltage requirements of the transformer. It is also worth mentioning that when encapsulating metal products through the existing metal encapsulation method, it is difficult for the metal product to be positioned in the injection mold, especially for thin metal sheets. Uncontrollable, the resulting rubberized metal product is of poor quality, and there is a possibility of short circuits...

AI Technical Summary

Problems solved by technology

[0002] At present, it is rare to see rubber-coated spiral metal windings used in transformers, because most of the rubber-coated metal products on the market are low-voltage or lower than 380 volt products, and basically most of the current plastic-coated metal products have no temperature. Grade requirements, so it cannot meet the high temperature and high voltage requirements of the transformer

It is also worth mentioning that when encapsulating metal products through the existing metal encapsulation method, it is difficult for the metal product to be positioned in the injection mold, especially for thin metal sheets. Uncontrollable, resulting in poor quality rubber-covered metal products, and the possibility of short circuits during injection molding due to metal displacement

Therefore, the performance of the rubber-coated metal products obtained by the existing rubber-coating method is not good, and the scope of use is relatively limited, so it cannot be applied to transformers

In other words, through the existing metal encapsulation method, it is difficult to ensure that the obtained encapsulating metal products can withstand high temperature and high pressure, and it is also difficult to meet the safety requirements of UL60950

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