High-power pseudo-spark switch tube for power electronic pulse conversion

A technology of power electronics and spark switch, applied in thermionic cathode tubes, etc., can solve the problems of long delay time, difficult output waveform of frequency conversion speed regulation system, etc., achieve the effects of small trigger power, solve trigger speed, and high repetition frequency

Inactive Publication Date: 2013-04-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the change of the trigger voltage and the long delay time also make it difficult for the frequency conversion speed control system to correctly complete the required output waveform.

Method used

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  • High-power pseudo-spark switch tube for power electronic pulse conversion
  • High-power pseudo-spark switch tube for power electronic pulse conversion
  • High-power pseudo-spark switch tube for power electronic pulse conversion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: as attached figure 1 , 2 , 3, 4 and 5, the high-power spark switch tube consists of a ceramic sealed tube body IV and the main electrode unit I contained therein, the trigger electron gun unit II, the hydrogen storage unit III, and an external circuit. The main electrode unit Ⅰ is installed in the upper middle part of the sealed ceramic tube body Ⅳ. It is composed of two stainless steel coaxial hollow cylinders with double ends closed, the end faces parallel and kept at a certain distance, and their electrical leads. The upper and lower cylinders are respectively The first anode A1 and the second anode A2, the center of the lower end surface of the first anode A1 has a circular hole d 11 , the center positions of the upper and lower ends of the second anode A2 are respectively opened with a garden hole d 21 and d 22 , hole d 11 with d 21 are equal in diameter and are 1.5mm, d 22 The hole diameter of the two cylindrical electrodes is 1mm, the inner di...

Embodiment 2

[0017] Embodiment 2: as attached figure 1 , 2 , 3, 4 and 5, the high-power spark switch tube consists of a glass sealed tube body Ⅳ and the main electrode unit Ⅰ, the trigger electron gun unit Ⅱ, the hydrogen storage unit Ⅲ, and the external circuit. The main electrode unit Ⅰ is installed in the upper middle part of the sealed glass tube body Ⅳ. It is composed of two stainless steel coaxial hollow cylinders with double ends closed, the end faces parallel and keeping a certain distance, and their electrical leads. The upper and lower cylinders are respectively The first anode A1 and the second anode A2, the center of the lower end surface of the first anode A1 has a circular hole d 11 , the center positions of the upper and lower ends of the second anode A2 are respectively opened with a garden hole d 21 and d 22 , hole d 11 with d 21 are equal in diameter and are 9mm, d 22 The hole diameter of the two cylindrical electrodes is 10mm, the inner diameter of the two cylindri...

Embodiment 3

[0018] Embodiment 3: as attached figure 1 , 2 , 3, 4 and 5, the high-power spark switch tube consists of a ceramic sealed tube body IV and the main electrode unit I contained therein, the trigger electron gun unit II, the hydrogen storage unit III, and an external circuit. The main electrode unit Ⅰ is installed in the upper middle part of the sealed ceramic tube body Ⅳ. It consists of two coaxial hollow cylinders (made of stainless steel) with closed double ends, parallel end faces and a certain distance between them and their electrical leads. The lower cylinders are respectively the first anode A1 and the second anode A2, and the center of the lower end surface of the first anode A1 has a circular hole d 11 , the center positions of the upper and lower ends of the second anode A2 are respectively opened with a garden hole d 21 and d 22 , hole d 11 with d 21 are equal in diameter and are 3mm, d 22 The hole diameter of the two cylindrical electrodes is 4mm, the inner dia...

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Abstract

The invention relates to a high-power pseudo-spark switch tube for power electronic pulse conversion, belonging to the technical field of a gas power electronic switch device. The high-power pseudo-spark switch tube comprises a main electrode, a trigger electron gun, a hydrogen storage unit, a sealing tube body and an outer circuit, wherein the main electrode comprises a first anode and a second anode; the first anode and second anode are closed at the two ends, leave each other for certain distance and are coaxial hollow cylinders; the trigger electron gun comprises a tubular cathode, a tungsten heating wire, an outer tube and a trigger electrode, and is arranged below the main electrode while the muzzle of the electron gun is aligned with an electron injection hole of the second anode; titanium hydride powder is arranged in the hydrogen storage unit, and the heating wire is spirally wound on the surface; and the outer circuit comprises a main power supply and load thereof, a triggerpower supply and a voltage division resistor thereof, a heating wire power supply and an electronic switch. According to the invention, the on / off of the main electrode is realized through the pseudo-spark discharge between two anodes; and the high-power pseudo-spark switch tube has the advantages of high withstand voltage, large on current, high repeat switch frequency, low on voltage drop and the like, is easy to conduct by trigger, allows short circuit of an output end, and is suitable for being used as a main switch element in an indirect type constant-energy pulse chopped-wave variable-frequency speed control system.

Description

technical field [0001] The invention relates to a high-voltage and high-power spark-like switching device used in a main circuit of electric power electronic conversion, and belongs to the technical field of gas power electronic switching devices. Background technique [0002] With the continuous deepening and development of low-carbon, energy-saving, and environmental protection actions, more and more enterprises apply high-voltage frequency conversion speed regulation systems above 10KV for energy conservation. However, the current high-voltage frequency conversion speed control systems generally have problems such as high price, complex structure, and unreliable operation, among which the problem of easy burning of semiconductor power main switching devices is the most prominent. Although researchers have made a lot of efforts to alleviate this problem, they have not been able to fundamentally solve it. [0003] From the perspective of theory and practice of the existing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J17/54
Inventor 卢诚洪元富
Owner KUNMING UNIV OF SCI & TECH
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