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Corona resistance test device and test method for enameled wire

A technology of corona resistance test and test device, applied in the direction of measuring device, testing dielectric strength, measuring electricity, etc., can solve the problems of low test efficiency and test accuracy, and achieve the effect of novel solution

Inactive Publication Date: 2019-11-26
SHANGHAI DEAN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem that existing enameled wire corona resistance test technology is based on actual use conditions and common power frequency, and the test efficiency and test accuracy are low, and provides an enameled wire corona resistance test device

Method used

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  • Corona resistance test device and test method for enameled wire
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  • Corona resistance test device and test method for enameled wire

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Embodiment Construction

[0035] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0036] Combining the structural design and manufacture of the motor, the present invention provides a test condition that can be set independently, can test 3-5 groups of samples at the same time, and is shared by round and flat wires, and is connected with an external operating system, which is easy to operate and can directly output Enameled wire corona resistance test device for test results.

[0037] The enameled wire corona resistance test device simulates the output pulse voltage condition of the variable frequency power supply in the laboratory, in order to quickly test the high frequency pulse resistance performance of the existing enameled wire products, and can determine the improved enameled wire in terms of insulation material, struct...

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Abstract

The invention discloses a corona resistance test device and test method for an enameled wire. The test device comprises a constant temperature oven, an IGBT system, a communication system, a control system and a power supply. During testing, two legs of a wire pair are inserted into a sample socket in the constant temperature oven. The control system controls the constant temperature oven to startto work and detects the working temperature of the constant temperature oven in real time. When the detected temperature reaches a set value, the control system controls the IGBT system to work. TheIGBT system generates high frequency high voltage and applies the high frequency high voltage to two enameled wire pairs to be tested in the constant temperature oven for testing. The control system records the test time in real time, judges the breakdown time point of the corona resistance enameled wires according to the change of the working signal of the IGBT system, and records the test time and temperature. After the test is completed, the control system controls the constant temperature oven and the IGBT system to stop working. The scheme provided by the invention has the advantages of being stable and reliable, high testing efficiency, high precision, clear and visual display and simple and fast operation.

Description

technical field [0001] The invention relates to an enameled wire corona resistance test technology, in particular to an enameled wire corona resistance test device and a corresponding test method. Background technique [0002] When the enameled wire is connected to a high-frequency changing voltage, an uneven electric field will be generated on the surface and inside the wire. Under the action of the uneven strong electric field, the conductor electrode with a small curvature radius will discharge the surrounding gas, which will cause the gas to be partially dissociated. The phenomenon is called corona. [0003] The free ions and electrons impact the polymer chains, together with the effect of ozone and local heating caused by the discharge, the polymer materials on the surface of the paint layer will be cracked, resulting in embrittlement and even cracking, which will eventually lead to the shock of the insulating paint layer. Put on. The ability of the enameled wire pain...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 叶贤忠
Owner SHANGHAI DEAN ELECTRICAL
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