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High-frequency pulse corona resistance tester

A high-frequency pulse and tester technology, which is applied in the direction of testing dielectric strength, can solve problems such as inability to fully measure the performance requirements of enameled wire products, and achieve the effect of fast testing speed and improved testing accuracy

Inactive Publication Date: 2015-07-01
CHANGZHOU WELLYUN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the frequency conversion motor, due to the non-sinusoidal wave in the coil but the short-shaped square-wave power supply, this type of waveform has the characteristics of an instant drop (about one tenth of a nanosecond). Obviously, conventional tests such as electric field strength tests, etc. , cannot fully measure the performance requirements of enameled wire products

Method used

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  • High-frequency pulse corona resistance tester
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Embodiment Construction

[0021] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] see figure 1 , the present invention provides a high-frequency pulse corona resistance tester 100, which is used to measure the high-frequency pulse resistance performance of enameled wire products, including a host computer 110 and a host computer 120 communicated with the host computer 110, and the host computer 110 includes:

[0023] A pulse power supply 111 for outputting a bipolar symmetrical square wave pulse voltage;

[0024] The test box 112 further includes: a plurality of test sample sockets 1121 connected to the pulse power supply 111 through high-voltage leads, and an acquisition module 1122 for collecting measurement data by connecting the input terminals to the test sample socket 1121;

[0025] The host computer 120 includes:

[0026] The processor system 121 is connected to the output terminal of the c...

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Abstract

The invention discloses a high-frequency pulse corona resistance tester used for measuring the high-frequency pulse resistance of enameled wire products. The tester comprises a host computer and a principal computer in communication connection with the host computer. The condition for pulse voltage output by a variable-frequency power supply can be simulated through a pulse power supply of the host computer, and the high-frequency pulse resistance of a plurality of test samples of an enameled wire product can be tested. The test accuracy is improved, the test speed is high, and the test result can be visually displayed through an oscilloscope.

Description

technical field [0001] The invention relates to the field of corona resistance test, in particular to a high-frequency pulse corona resistance tester. Background technique [0002] With the continuous improvement of industrial production automation requirements, the frequency conversion regulation system driven by the frequency conversion power supply to the induction motor has been rapidly developed and widely used. [0003] After the variable frequency power supply is used in the motor, its output voltage waveform parameters are affected by factors such as the "connection length" from the output terminal to the motor input terminal. Especially in the application of IGBT frequency converter, additional pulse voltage and "overshoot" will be generated at the motor input end, and the pulse additional voltage and "overshoot" will actually be applied to the motor stator winding, resulting in the gap between the enameled wires of adjacent windings Partial discharge and insulatio...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 夏克叶贤刚周震堃
Owner CHANGZHOU WELLYUN ELECTRICAL