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Insulation aging test device used for converter high voltage pulse equipment

A technology of insulation aging and test device, applied in the direction of measuring device, measuring electrical variables, instruments, etc., can solve the problems of accelerated aging test of insulating materials, avoid interlayer interference, reduce the number of windings, and reduce the distortion of pulse square wave waveform Effect

Inactive Publication Date: 2007-11-14
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, the pulse square wave voltage amplitude of some frequency conversion high-voltage pulse equipment is very high in actual working conditions. The distribution inhomogeneity in the winding, the peak value of the pulse voltage actually borne by the winding is far greater than 5.2kV
Therefore, the existing testing device cannot meet the needs of the insulation accelerated aging test for the insulating material in the frequency conversion high-voltage pulse equipment

Method used

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  • Insulation aging test device used for converter high voltage pulse equipment

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Effect test

Embodiment 1

[0020] Figure 1 shows that a specific embodiment of the present invention is: an insulation aging test device for frequency conversion high-voltage pulse equipment, including an isolation transformer 1 connected to a commercial frequency power supply, and a pulse generator connected to the output terminal of the isolation transformer 1 2, the output end of the pulse generator 2 is connected to the wire in the insulating sleeve 4 of the oven 5. The specific way in which the output end of the pulse generator 2 is connected to the wire in the insulating sleeve 4 of the oven 5 is as follows: the output end of the pulse generator 2 is connected to the primary side of the high-frequency step-up transformer 3, and the secondary side of the high-frequency step-up transformer 3 is connected to the insulating sleeve 4 wires are connected. The high-frequency step-up transformers 3 are: four high-frequency step-up transformers 3 that are alternately connected with operating frequencies of...

Embodiment 2

[0027] This embodiment is basically the same as Embodiment 1, except that the high-frequency step-up transformer 3 is composed of two transformers 3a.

Embodiment 3

[0029] This embodiment is basically the same as Embodiment 1, except that the high frequency step-up transformer 3 is composed of 10 transformers 3a.

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Abstract

An insulation ageing test device of frequency conversion high voltage pulse equipment is prepared as connecting output end of pulse generator to primary edge of high voltage boosting transformer with its secondary edge being connected to wire in insulation sleeve, applying 300H2 to lkH2, 1kH2 to 5kH2 , 5kH2 to 10k H2 and 10k H2 to 20k H2 as operation frequency of high voltage boosting transformer alternately, connecting said boosting transformer to output of pulse generator for outputting square wave to meet requirements of insulation ageing test.

Description

Technical field [0001] The invention relates to an insulation aging test device for frequency conversion high voltage pulse equipment Background technique [0002] Variable-frequency high-voltage pulse equipment such as AC variable-frequency speed-regulating transmission systems are widely used in industry. When the inverter is working, it outputs a high-voltage continuous pulse square wave with a steep rising edge. Among them, the output pulse square wave voltage of the inverter driving the variable frequency traction motor is as high as 5.2kv, and the frequency is 300Hz-20kHz. The pulse square wave passes through the cable to generate an oscillating overvoltage at the motor terminal, and its amplitude can reach twice the amplitude of the pulse square wave; at the same time, the pulse square wave will also cause uneven voltage distribution between the coils and turns of the motor winding, making the terminal The voltage that the coil (insulated wire) bears reaches 80% of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 吴广宁佟来生林同光刘曦
Owner SOUTHWEST JIAOTONG UNIV
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