Directly tandem high-voltage impulse power supply for insulation detection

A technology of high-voltage pulse power supply and DC power supply, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc. It can solve the problems of difficult output pulse waveform and increase cost, and achieve the effect of steep rising edge and convenient amplitude adjustment

Inactive Publication Date: 2009-05-13
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the primary and secondary stages of the transformer have leakage inductance, and the test sample is capacitive, it is difficult to output a pulse waveform with a steep rising edge. At the same time, the transmission signal of a pulse transformer is limited by the frequency range, and pulse signals of different frequencies have different requirements. the transformer
In the insulation test, the frequency range of the pulse is very wide, so multiple transformers are required, which not only increases the cost of the design, but also brings a lot of inconvenience to the use.

Method used

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  • Directly tandem high-voltage impulse power supply for insulation detection
  • Directly tandem high-voltage impulse power supply for insulation detection
  • Directly tandem high-voltage impulse power supply for insulation detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 It is shown that a specific embodiment of the present invention is a high-voltage pulse power supply for insulation detection directly connected in series, which consists of:

[0033] The power output terminals of the AC / DC direct current power supply ADP with electrical isolation between a plurality of inputs and outputs are respectively connected with the power input terminals of the corresponding single-phase full-bridge inverter I;

[0034] The output terminal of the inverter control system IC is connected to the input terminal of the inverter driver ID, and the inverter driver ID has multiple sets of mutually electrically isolated output terminals connected to the corresponding single-phase full-bridge inverter I control terminal respectively.

[0035] Various existing technologies can be used to realize the mutual electrical isolation of multiple sets of output terminals of the inverter drive ID. The output windings form mutually isolated outputs.

[00...

Embodiment 2

[0038] figure 2 It is shown that a direct series connection high-voltage pulse power supply for insulation detection in this example is composed of:

[0039] The output terminal of the AC / DC direct current power supply ADP is connected to the power input terminal of multiple DC / DC direct current power supply DDPs with electrical isolation between the input and the output, and the output terminals of each DC / DC direct current power supply DDP are electrically isolated from each other, that is, multiple DC There is no electrical connection between the outputs of the / DC direct current power supply DDP, and the output end of each DC / DC direct current power supply DDP is connected to the power supply input end of the corresponding single-phase full-bridge inverter I;

[0040] The output terminal of the inverter control system IC is connected to the input terminal of the inverter driver ID, and the inverter driver ID has multiple sets of mutually electrically isolated output termi...

Embodiment 3

[0043] image 3 It is shown that a direct series connection high-voltage pulse power supply for insulation detection in this example is composed of:

[0044] The output terminal of the AC / DC direct current power supply ADP is connected to the power supply input terminal of the DC / DC direct current power supply DDP electrically isolated between the input and the output, and multiple pairs of output terminals of the DC / DC direct current power supply DDP are electrically isolated from each other. This kind of DC power supply can be realized in many ways. For example, the transformer primary of DC / DC DC power supply DDP has only one winding, and the secondary uses multiple output windings wound on the same iron core that are not electrically connected to each other to form a mutual winding. Isolation, so as to realize the electrical isolation between the input and the output and make the multiple pairs of output terminals also electrically isolated. Every pair of output ends is con...

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PUM

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Abstract

The invention discloses a direct series high-voltage pulse power source for insulation test. The high-voltage pulse power source is characterized in that power supply outputs of a plurality of electrically isolated AC / DC DC power sources are respectively connected with power supply input terminals of the corresponding single-phase full bridge inverters; or the AC / DC DC power supply outputs are connected in parallel with a plurality of inputs of electrically isolated DC / DC DC power sources, outputs of a plurality of DC / DC DC power sources are electrically isolated from each other, and the output of each DC / DC DC power source is connected with the power supply input terminal of the corresponding single-phase full bridge inverter. An output of an inverter control system is connected with the input of an inverter driver, and the inverter driver is provided with a plurality of sets of electrically isolated outputs which are connected with control terminals of the corresponding single-phase full bridge inverter respectively. The power supply output terminals of a plurality of single-phase full bridge inverters are sequentially connected in series. The pulse power source can generate high-voltage pulses with adjustable amplitude and frequency, and the pulse voltage rising edge is steep.

Description

technical field [0001] The invention relates to a pulse power supply, in particular to a high-voltage pulse power supply for insulation detection. Background technique [0002] The insulation performance of transformers and motors directly affects their service life, so their insulation performance must be inspected and tested during R&D and production. Due to the working characteristics of transformers and motors, it is necessary to use high-voltage pulses with high rising rates and steep edges to speed up the testing process. There are two kinds of pulse power commonly used in insulation testing: 1. A full-bridge inverter composed of high-speed high-voltage switching devices is used to generate pulse voltage and then output it directly. Due to the limitation of the voltage level of the switching devices of the inverter, this method cannot output a very high voltage; if multiple switching devices are directly connected in series, it will cause a difficult problem of voltag...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R1/00H02M9/00
Inventor 郭育华卢国涛张昆仑丁娜舒泽亮汤坚陈灿连级三
Owner SOUTHWEST JIAOTONG UNIV
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