Research On Modularity Of Single Resonant Pulse Forming Unit For Electromagnetic Launch

The energy storage methods of the pulse shaping unit are currently mainly capacitive energy storage and inductive energy storage.Capacitor energy storage method has the advantages of flexible combination,convenient configuration and large output power,but the traditional capacitor energy storage density is low.Compared with capacitive energy storage,inductive energy storage has a higher density and a smaller size.However,traditional inductors lose a lot of energy during work,and are not suitable for devices that require long hours of operation.With the development of superconducting technology,superconducting sense has a greater energy storage density,and the loss is small,and can store energy for a long time.Compared with other energy storage methods,superconducting sense energy storage has a greater energy storage density,and the loss is small.The advantage of being able to store energy for a long time has shown good application prospects in the field of electromagnetic emission.High-temperature superconducting pulse transformer is an important equipment for constructing high-temperature superconducting inductive pulse forming unit.Among them,the single resonance pulse shaping circuit is a pulse shaping mode based on high temperature superconducting pulse transformer.The single resonant pulse shaping mode can output current pulses of higher amplitude,and the energy transmission efficiency is higher.However,the pulse width of the current pulse output by the single-resonance pulse shaping mode is small,and the energy storage of the conversion capacitor accounts for a relatively high proportion of the total energy storage of the inductor,which reduces the overall energy storage density of the system.To this end,this paper proposes a “capacitive multiplexing” method to increase the width of the output pulse and the total energy storage density of the system.Taking the 270 k J superconducting pulse power supply(SPPS)system as an example,this article describes the circuit of the capacitive multiplexing method in detail Concept design and simulation verification.This article will elaborate through the following aspects:(1)This article first establishes a single resonance pulse shaping unit circuit,introduces its working process and principle in detail,and selects the current amplification factor,the maximum voltage of the disconnect switch and the maximum capacitor energy storage ratio as the main performance indicators,and analyzes the system parameters Impact on system performance.(2)Secondly,an experimental circuit is built based on the high-temperature superconducting pulse transformer,and the synchronous discharge and asynchronous discharge of the pulse forming are simulated and experimentally verified.Through simulation and experimental results,it can be concluded that multiple sets of parallel synchronous discharge can further amplify the current pulse amplitude,and multiple sets of parallel asynchronous discharge can obtain a larger current pulse width.(3)Then,the circuit model of the multi-module single-resonance pulse shaping unit circuit is established,and the working process of the circuit is simulated and analyzed using the software platform of the simpler,and the coupling coefficient,conversion capacitance,secondary inductance and other circuits are analyzed.Influence of parameters on electromagnetic emission characteristics.(4)Finally,the current pulse width of the output of the single resonance pulse shaping mode is small,and the ratio of the energy storage of the conversion capacitor to the total energy storage of the inductor is also high.This paper proposes a “capacitive multiplexing” method to increase the width of the output pulse and the total energy storage density of the system.Through simulation,it can be concluded that the pulse width of the SPPS current pulse improved based on the capacitive multiplexing method increases,and the maximum capacitance energy accounts for the total inductance.The ratio of energy storage decreases and the energy density of the system increases.In conclusion,the research results show that the improved scheme of capacitance multiplexing for the single-resonance pulse-shaping unit circuit for electromagnetic emission proposed in this paper can obtain a larger pulse width,and the total energy storage density of the system has also been improved.It can provide some reference for the development of pulse shaping unit technology for electromagnetic emission.