Pulsed-liquid phase discharge system based on multiplex IGCT parallel connection

A pulse discharge, liquid phase technology, applied in the field of high power pulse, liquid phase pulse discharge system

Inactive Publication Date: 2010-09-22
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of multiple switches in parallel can solve the problem of large curr

Method used

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  • Pulsed-liquid phase discharge system based on multiplex IGCT parallel connection
  • Pulsed-liquid phase discharge system based on multiplex IGCT parallel connection
  • Pulsed-liquid phase discharge system based on multiplex IGCT parallel connection

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Embodiment Construction

[0016] figure 1 It is the circuit diagram of the positive high voltage pulse output for the present invention. As shown in the figure, a liquid-phase pulse discharge system with multiple IGCTs connected in parallel can be composed of two or more discharge circuits connected in parallel. The components of each path, including the current limiting inductor 1, the energy storage capacitor 2, the freewheeling diode 3, the IGCT switch 4 and the pulse transmission line 5, are connected in sequence. There are two current-limiting inductors 1 for each channel, which are respectively connected in series with the high-voltage input end and the low-voltage input end of the energy storage capacitor 2 to play the role of current limiting. They can be air-core inductors or include magnetic cores. The energy storage capacitor 2 can be composed of one or more low-inductance solid-state pulse energy storage capacitors connected in series and parallel. The freewheeling diode 3 is connected in...

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Abstract

The invention discloses a pulsed-liquid phase discharge system based on multi-path IGCT parallel connection, belonging to the pulse power source field. The system can be composed of two or more paths of parallel discharge circuits; each path of elements contain a current-limiting inductor, a storage capacitor, freewheeling diodes, IGCT switches and a pulse transmission line which are connected in turn; the current-limiting inductor is in serial connection in the charge circuit of the storage capacitor; the storage capacitor can be composed of one or more of low sensitivity solid pulse storage capacitors which are connected in parallel; two ends of the storage capacitor are in parallel connection with freewheeling diodes; each path of IGCT switches can be composed of one or more of IGCTs which are connected in series and triggered by an external trigger circuit, the output ends are separately connected with the high-voltage input end of the pulse transmission line and in the circuit, and the low-voltage input ends of the pulse transmission line are successively connected with the low-voltage ends of the storage capacitors in other circuits in a staggered manner. The system can effectively solve the synchronization problem of switches and realize large electric current discharging up to hundreds of kiloamperes.

Description

technical field [0001] The invention relates to high-power pulse technology, in particular to a liquid-phase pulse discharge system with multiple IGCTs connected in parallel, belonging to the field of pulse power supplies. Background technique [0002] At present, the liquid-phase pulsed plasma power supply used in marine seismic exploration generally adopts capacitor energy storage, and discharges through high-power semiconductor switches (such as IGCT), which solves the problems of unstable pulse output and short switch life when using spark gap switches. In the marine environment, the liquid-phase pulsed plasma power supply works below 10kV. To increase the output power of the power supply, the feasible way is to increase the discharge current. At present, the withstand current limit of semiconductor switching devices is generally tens of kA, so a single switch or a single series switch cannot be used to complete a large current discharge of hundreds of kA. Contents of ...

Claims

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Application Information

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IPC IPC(8): H02M9/02
Inventor 闫克平黄逸凡
Owner ZHEJIANG UNIV
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