An air-insulated switch and fast leading edge high voltage square wave generator
A square wave generator and air-insulated technology, applied in pulse train generators and other directions, can solve the problems of inability to achieve precise adjustment of square wave amplitude, slow front, inconvenience, etc., and achieve accurate and convenient square wave amplitude adjustment. The effect of fast wave front and convenient operation
Inactive Publication Date: 2017-06-20
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology
For the first type of generator, since the solid film used for insulation in the switch fails after being used once, a new film needs to be replaced before each use, which brings inconvenience to the user and reduces the experimental efficiency
Although the second generator output square wave amplitude is high, but the leading edge is slow (13ns), the third generator output square wave leading edge and amplitude are more ideal, but because of the use of high-voltage nitrogen spark switch, it is necessary to be equipped with a high-voltage The nitrogen cylinder makes the whole device more complex and bulky
In addition, the output voltage amplitude of the latter two generators can only be adjusted by adjusting the air pressure in the switch, which is very inconvenient and cannot achieve precise adjustment of the other wave amplitude; while the first type of generator only needs to adjust the charging of the forming line The voltage can change the amplitude of the output square wave
Method used
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[0027] Example: In the high-voltage square wave generator developed according to the above method, two industrial standard cables with a wave impedance of 50Ω are used in parallel as the pulse forming line. The wave impedance of the switch part is designed according to 25Ω. When the inner diameter of the large end of the conductor is 36mm and the distance between the inner and outer conductors is 5mm, the switch can withstand a high voltage of 10kV, and the leading edge of the output square wave is less than 5ns.
[0028] The air switch of the present invention overcomes the shortage of insulating media such as solid film in the existing air-insulated switch, and directly utilizes the air gap between the trigger pin and the inner conductor and the level matching process to realize the rapid closing of the air-insulated switch, thereby Obtaining a fast leading edge square wave pulse on the load provides a new idea for the generation of pulse power technology.
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The invention discloses an air-insulated switch and a fast-rise-time high-voltage square wave generator. The air-insulated switch comprises an inner conductor, outer conductors, an insulating sleeve and a trigger pin which are arranged coaxially, wherein the trigger pin moves forward and backward along the center of a through hole under the action of an electromagnet driving mechanism to impact the inner conductor for triggering. The fast-rise-time high-voltage square wave generator comprises a high-voltage power supply, a charging resistor, a primary pulse forming line, a secondary pulse forming line, the air-insulated switch and a load. The air-insulated switch is compact in structure and convenient to operate, and only requires a certain insulation distance kept between the inner conductor and the outer conductors without no other insulation media (solid films, liquid-insulated media or insulating gases such as nitrogen, and the like) and a vacuumizing mode. The fast-rise-time high-voltage square wave generator has the advantages of fast square wave output rise time, high amplitude value, precision and convenience in square wave amplitude value adjustment and the like.
Description
technical field [0001] The invention belongs to high-voltage technology and pulse power technology, and relates to a high-voltage square wave generator, especially a high-voltage square wave generator with a fast leading edge Background technique [0002] The square wave pulse generator is mainly used in the field of high voltage technology and pulse power technology. It is usually used for experimental calibration of the voltage division ratio of measuring probes such as voltage dividers. The requirement for the output square wave is that the rising edge is as fast as possible, High amplitude. [0003] The principle of the square wave pulse generator is to use the pulse forming line (coaxial cable, L-C artificial line or strip transmission line) as the energy storage unit, and the fast closing switch is connected to the pulse forming line, and the pulse forming line is charged with DC in advance, through The closed switch is controlled to close quickly, and the process of ...
Claims
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IPC IPC(8): H03K3/64
CPCH03K3/64H03K3/72
Inventor 马连英曾正中安晓霞黄超朱峰
Owner NORTHWEST INST OF NUCLEAR TECH