Corona resistance testing device and method for varnished wires

A technology of corona resistance testing and testing equipment, applied in the direction of testing dielectric strength, etc., can solve the problems of low testing efficiency and testing accuracy, and achieve the effect of novel solutions

Inactive Publication Date: 2013-03-13
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 testing device and method for varnished wires
  • Corona resistance testing device and method for varnished wires
  • Corona resistance testing device and method for varnished wires

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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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PUM

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Abstract

The invention discloses a corona resistance testing device and method for varnished wires. The testing device comprises a consistent-temperature oven, an IGBT (Insulated Gate Bipolar Translator) system, a communication system, a control system and a power supply. During test, two pins of wire pairs are inserted in a sample socket in the consistent-temperature oven; the control system controls the work of the consistent-temperature oven and detects the working temperature of the oven in real time, and when a detected temperature reaches a set value, the control system controls the IGBT system to work; the IGBT system generates high-frequency voltage and applies the high-frequency voltage to the two varnished wire pairs to be tested in the consistent-temperature oven so as to conduct the test; the control system records testing time in real time, judges the breakdown time of the corona-resistant varnished wires according to the change of working signals of the IGBT system, and records the testing time and temperatures; and after the test is finished, the control system controls the consistent-temperature oven and the IGBT system to stop working. The testing device and method with the scheme provided by the invention have the advantages of stability, reliability, high testing efficiency, high precision, clearness and definition in display, and simplicity and convenience in 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
Inventor 叶贤忠
Owner SHANGHAI DEAN ELECTRICAL
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