Insulation aging test device used for converter high voltage pulse equipment

A technology for insulation aging and testing equipment, which is applied in the direction of measuring equipment, measuring electrical variables, instruments, etc., can solve problems such as accelerated aging testing of insulating materials, and achieve the effects of avoiding interlayer interference, reducing stray capacitance, and small waveform distortion

A technology for insulation aging and testing equipment, which is applied in the direction of measuring equipment, measuring electrical variables, instruments, etc., can solve problems such as accelerated aging testing of insulating materials, and achieve the effects of avoiding interlayer interference, reducing stray capacitance, and small waveform distortion

CN1793989AInactive Publication Date: 2006-06-28SOUTHWEST JIAOTONG UNIV
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  • Insulation aging test device used for converter high voltage pulse equipment
  • Insulation aging test device used for converter high voltage pulse equipment
  • Insulation aging test device used for converter high voltage pulse equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] figure 1 It 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 2 connected to the output end of the isolation transformer 1 , the output end of the pulse generator 2 is connected to the wire in the insulating casing 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 o...

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

Patent Timeline
28 Jun 2006
Publication
CN1793989A
IPC
G01R31/00
Inventors
吴广宁; 佟来生