Semiconductor opening switch (SOS)-based ultra-wide spectrum pulse generator with 100 kHz pulse frequency

Abstract

The invention discloses a semiconductor opening switch (SOS)-based ultra-wide spectrum pulse generator with 100 kHz pulse frequency, and belongs to the technical field of pulse power. The pulse generator comprises a charging power supply, a primary low-voltage quick pulse generation unit, a magnetic saturation linear transformer, a pumping capacitor, an SOS and a load in sequence. A plurality of primary low-voltage quick pulse generation units are uniformly arranged at the periphery of each single module and thus the primary current output capacity is increased. A trigger controls the on and off of a metal oxide semiconductor field effect transistor (MOSFET) to generate scores of ns to hundreds of ns pulse with a repeated frequency of 100kHz. The magnetic saturation linear transformer is formed by connecting a plurality of single modules in series. On one hand, the output voltage can be increased by increasing the series number of the single module; on the other hand, after the transformer core is saturated, the secondary side is a coaxial squirrel cage structure, the inductance of a reversed pump is reduced, the time of a reversed current pump can be shortened, an SOS quickly cuts off current, and a high-voltage ultra-wide spectrum pulse is generated in the load. A mismatching charging mode from a primary energy storage large capacitance to a secondary pump small capacitance is used to obtain a high voltage on a pumping capacitor; and on the other hand, under the same target voltage, the series number of the single module is reduced, the inductance of the reversed pump is reduced, and 100kHz ultra-wide spectrum pulse generation is promoted.

Description

technical field [0001] The invention belongs to the technical field of pulse power, and relates to a repetition frequency high-power ultra-wide spectrum pulse generator, in particular to a 100 kHz ultra-wide spectrum pulse generator based on SOS (Semiconductor Opening Switch). Background technique [0002] Ultra-broad spectrum pulse refers to a high-voltage electrical pulse with a leading time of less than 1-2 nanoseconds and a relative bandwidth of more than 25%. Its spectrum can range from tens of MHz to upper GHz. High repetition rate ultra-wide spectrum pulse (repetition frequency: tens of kHz to hundreds of kHz; pulse width: sub ns to several ns) has broad application prospects in electronic countermeasures, biomedicine, plasma generation and other fields, generating high repetition rate The key to ultra-broadband pulses lies in the generation of high-voltage short pulses with fast pulse fronts. [0003] Although the ultra-broadband pulse source with gas switch as the...

AI Technical Summary

Problems solved by technology

The output voltage is 120kV on a 125Ω load, the pulse width is 5~6ns, the highest repetition frequency is 1kHz, and the system energy efficiency is lower than 10%.

[0009] The current technology of using SOS to generate high-voltage short pulses has problems such as low energy efficiency, difficulty in achieving both repetition frequency and pulse width, etc.

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