Assurance method of insulation distance of high-voltage coil

Abstract

The invention relates to an assurance method of an insulation distance of a high-voltage coil. The high-voltage coil comprises a framework, insulating films, an enameled wire, a copper skin and a leadwire, wherein the framework is of a rectangular hollow structure and the section of the framework is a square; each of the insulating films is formed by arranging a high-temperature polyester thin film between two layers of nomax paper. All windings are wound at the center and all the insulating films are fixed at the center; the widths of the insulating films are reduced in sequence so that a leading-out wire reaches the maximum insulation distance; finally, the copper skin is used for covering for one circle and the insulating films are fixed. By adopting the assurance method, the phenomenathat arc discharge and breakdown caused by the fact that a creepage distance between original windings or leading-out wires is not enough are improved. By adopting the improvement, an original winding method or an insulating material with the same width is changed into grouped winding and an insulating material which is gradually reduced, so that the creepage distance of the leading-out wires ofthe windings is increased by at least 3mm, and the reliability of a product can be effectively increased and the service life of the product can be effectively prolonged.

Description

technical field [0001] The invention relates to a method for ensuring the insulation distance of a high-voltage coil, which is used for a high-voltage coil of a high-voltage power supply of a medical X-ray machine. Background technique [0002] With the development of modern power electronics technology and the birth of high-frequency switching devices, high-voltage switching power supplies are developing towards high frequency and miniaturization. Therefore, the high-voltage coil in the high-voltage transformer needs to pursue a smaller volume, and it is more important to ensure the corresponding electrical clearance. At present, the manufacturing process of high-voltage coils is generally an uninterrupted layered winding of a polyurethane enameled wire: [0003] First, the Z-shaped winding structure is adopted, and the insulation material of the same width is used between the layers, and the output is a set of high-voltage windings. The advantage of this is that there ...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this process are: complex structure, complex operation, high requirements for production personnel, the processing method of winding cross-layer needs to be strictly in accordance with the process drawings, and it is difficult to process the high voltage output by the subsequent stage

The third scheme is more reliable in technology. However, after being divided into N windings, the lead wires are also increased, so that the phenomenon of arcing and breakdown between the lead wires will increase.

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