Anticorona structure of stator coil of high-voltage motor

Abstract

The invention relates to an anticorona structure of the stator coil of a motor, in particular to an anticorona structure of the stator coil of a 10KV high-voltage motor three-phase asynchronous motor. According to the technical scheme provided by the invention, the anticorona structure of the stator coil of the high-voltage motor comprises a stator iron core, a coil, a mica powder tape, a low-resistance tape, a high-resistance tape and a glass tape, wherein the coil is arranged on the stator iron core of the motor; both the linear section and bent section of the coil are wrapped with a layer of integrated mica powder tape; a layer of the low-resistance tape wraps the mica powder tape outside the linear section of the coil; a layer of the high-resistance tape wraps the mica powder tape outside the bent section of the coil; and layer of glass tape wraps the high-resistance tape. In the anticorona structure, an original baked step outside the overlapped area of the high-resistance tape and the lower-resistance tape is removed and the length of the baked lock block is increased; and thus, the critical coronal voltage of corona is ensured, repair is completely avoided, and the reliable and long-term safe operation is ensured.

Description

Technical field [0001] The invention relates to an anti-corona structure for the stator coil of a motor, in particular to an anti-corona structure for the stator coil of a 10KV high-voltage three-phase asynchronous motor. Background technique [0002] At present, 10KV motor is a product that has been developed and produced in recent years. The market demand is large and the economic benefits are good. However, 10KV motor has high stator voltage and high coil corona voltage. The most prone to corona in high voltage motor is the slot outlet. At the end of the winding, the air gap in the insulation, etc. When the corona occurs, the decomposed ozone and nitrogen oxides and other gases and water vapor work together to chemically corrode the insulation of the coil. The chemical effect will quickly corrode and even break down the insulation along with the heat, thereby shortening the life of the motor . [0003] In-depth analysis and research on the corona problem are carried out. The m...

AI Technical Summary

Problems solved by technology

[0003] In-depth analysis and research have been carried out on the corona problem. The main reasons for the low corona inception voltage of the coil are unreasonable anti-corona structure, uneven electric field distribution, and too large voltage gradient at the end of the coil. Therefore, it is necessary to take certain measures to change the existing anti-corona. halo structure

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