CAJ | 학술논문

针对分布馈电式(DES)轨道型电磁驱动系统,建立了基于Pspice的电路模型;采用最常见的电容储能方式构成脉冲成形网络(PFN);负载模型充分考虑电枢运动时的滑动摩擦,以及导轨电感、电阻等非线性因素.由仿真结果得到的电流值可以计算出电枢所承受的电磁力,从而得到电枢的加速度、速度,以及动能.分别选取不同电容器组的电容量或初始电压,脉冲成形电感器的电感量,主放电开关的闭合时间间隔,以及PFN模块参数(包括模块的数量、结构等),进行仿真分析,得出在各种参数下的系统效率,并加以比较,确定了几种可以有效提高轨道型电磁驱动系统效率的方法或者最优化的参数.仿真结果表明:在电枢质量与加速距离不变的条件下,电容器组的电容量或初始电压越高,电枢初速度越大,而系统效率随着电压的升高先增大后减小;脉冲成形电感器的电感量越大,电感器中的剩余能量越大,系统效率越低;主放电开关的闭合时间间隔越短,系统的效率越高;在初始能量一定的前提下,电源的模块数越多,电枢的出膛速度越大,系统效率也越高,可以通过采用多组小电容值的电容,来提高系统的效率;优化的PFN模块参数设计能够提高系统的效率.
침대분포궤전식(DES)궤도형전자구동계통,건립료기우Pspice적전로모형;채용최상견적전용저능방식구성맥충성형망락(PFN);부재모형충분고필전추운동시적활동마찰,이급도궤전감、전조등비선성인소.유방진결과득도적전류치가이계산출전추소승수적전자력,종이득도전추적가속도、속도,이급동능.분별선취불동전용기조적전용량혹초시전압,맥충성형전감기적전감량,주방전개관적폐합시간간격,이급PFN모괴삼수(포괄모괴적수량、결구등),진행방진분석,득출재각충삼수하적계통효솔,병가이비교,학정료궤충가이유효제고궤도형전자구동계통효솔적방법혹자최우화적삼수.방진결과표명:재전추질량여가속거리불변적조건하,전용기조적전용량혹초시전압월고,전추초속도월대,이계통효솔수착전압적승고선증대후감소;맥충성형전감기적전감량월대,전감기중적잉여능량월대,계통효솔월저;주방전개관적폐합시간간격월단,계통적효솔월고;재초시능량일정적전제하,전원적모괴수월다,전추적출당속도월대,계통효솔야월고,가이통과채용다조소전용치적전용,래제고계통적효솔;우화적PFN모괴삼수설계능구제고계통적효솔.
A Pspice model of electromagnetic launch(EML) system was built up for the distributed energy store(DES) powered railgun. The pulsed power supply adopts the capacitor-based pulse forming network(PFN), which is widely-used in railgun systems. The railgun model takes consideration of many nonlinear factors caused by the movement of armature. During simulation, various parameters were applied to calculate the efficiency of the EML system, including capacitance and initial voltage of capacitor bank, inductance of pulse forming inductor, intervals of crowbar switches, parameters of pulse forming units and so on. Through comparison and analysis, several methods to raise the efficiency of the EML system were acquired. The simulation results show that, for given amature mass and accelerating distance, the launching velocity of the armature increases with the initial voltage and capacitance of capacitor bank, whereas the efficiency of the system has a maximum; larger inductance of pulse forming inductor results in larger dump energy and lower efficiency; with shorter intervals of crowbar switches, the efficiency is higher; for a fixed initial energy, more modules of PFNs lead to higher launching velocity and efficiency. It is possible to increase the efficiency by applying more capacitors with less capacitance. Also, optimized parameters of PFN will increase the efficiency.