Continuous insulating cylinder of three-dimensional wound core transformer and manufacturing method thereof

Abstract

The invention discloses a manufacturing method of a continuous insulating cylinder of a three-dimensional wound core transformer, comprising the following steps: A, winding a low-voltage coil on a transformer core in advance, placing a tubular mould at the outside of the low-voltage coil, wherein the tubular mould is formed by splicing of two half moulds, and the cross-section shape thereof is circular, oval or rectangular; B, winding a plurality of layers of foil-plate-like insulating materials at the outside of the tubular mould until reaching preset thickness to form the insulating cylinder; C, winding a high-voltage coil at the outside of the insulating cylinder, wherein the insulating cylinder is fully isolated from the low-voltage coil and the high-voltage coil; D, dipping paint and performing drying after winding the high-voltage coil; and E, dismantling the tubular mould. The invention further discloses the continuous insulating cylinder manufactured by using the above method. The insulating cylinder which is wound by the method of the invention does not have a joint. The thickness of the whole insulating cylinder in each direction is uniform and meets the insulating thickness. The method of the invention can be applied to manufacture the insulating cylinder with circular, oval or rectangular coil and used for preventing high voltage from breaking through the joint to discharge to the low-voltage coil.

Description

Technical field [0001] The invention relates to the field of transformers, in particular to a continuous insulating cylinder of a three-dimensional wound core transformer and a manufacturing method thereof. Background technique [0002] At present, the three-dimensional wound core transformer is placed in the main insulation of the high and low voltage coils to enhance the insulation effect and prevent high voltage discharge to low voltage. This insulating tube is generally made into two halves, which are inserted into the main airway to form a tube. Depending on the shape of the airway, the tube will be round, oval or rectangular. The three types of tubes have two seams. No matter how precise the two halves are matched, there is no gap between them. Once the high and low voltage strength is too high, this The two joints are most likely to be broken down, affecting the service life of the transformer. Summary of the invention [0003] In order to solve the above technical proble...

AI Technical Summary

Problems solved by technology

Depending on the shape of the airway, the cylinder can be made into a circle, an oval or a rectangle. There are two seams in each of the three cylinders. No matter how closely the two halves fit together, there will inevitably be a gap. Once the high and low voltage voltages are too strong, the The two seams are most likely to be broken down, which affects the service life of the transformer