Abstract：Improving the energy conversion efficiency of synchronous induction coilgun is one of hotspots in the electromagnetic launch research. In the process of armature movement, the magnetic field changes dramatically along the axis. The induced current and motional current is generated, the force on the armature is distributed nonuniformly. For the magnetic field generated by the driving coils in the same direction, the acceleration time zone on armature mainly located on the rising time of the driving coil current, and the current in the cross section is unevenly distributed. Due to the decrease of the driving coil current and the movement of the armature, the magnetic field decreases rapidly, which affects the energy conversion efficiency. The change of the magnetic field in the barrel has great influenced on the armature acceleration. By changing the direction of the coil current, the muzzle velocity of the armature is significantly increased. The acceleration time zone on armature mainly located on the falling time of the driving coil current, and the armature current on the cross section is increased dramatically, which is beneficial to increase the electromagnetic force. The experimental results show that the muzzle velocity and system conversion efficiency are significantly improved after changing the direction of the magnetic field. This method provides a reference for the design of multi-stage coilgun.
张涛, 国伟, 苏子舟, 刘勇, 范薇. 基于磁场方向变化的同步感应线圈发射器效率提升分析[J]. 电工技术学报, 2021, 36(3): 517-524.
Zhang Tao, Guo Wei, Su Zizhou, Liu Yong, Fan Wei. Analysis of Improving Efficiency on Synchronous Induction Coilgun Based on the Directional Change of Magnetic Field. Transactions of China Electrotechnical Society, 2021, 36(3): 517-524.
[1] Wang Y, Marshall R A, Cheng S K.Physics of electric launch[M]. Beijing: Science Press, 2004. [2] Kaye R J.Operational requirements and issues for coilgun EM launchers[J]. IEEE Transactions on Magnetics, 2005, 41(1): 194-199. [3] Skurdal B D, Gaigler R L.Multimission electromagnetic launcher[J]. IEEE Transactions on Magnetics, 2009, 45(1): 458-461. [4] 邱立, 李彦涛, 苏攀, 等. 电磁成形中电磁技术问题研究进展[J]. 电工技术学报, 2019, 34(11): 2247-2259. Qiu Li, Li Yantao, Su Pan, et al.Research on electromagnetic problems in electromagnetic forming process[J]. Transactions of China Electrotechnical Society, 2019, 34(11): 2247-2259. [5] Williamson S, Horne C K.Design of pulsed coilguns[J]. IEEE Transactions on Magnetics, 1995, 31(1): 516-521. [6] Kim S, Jung H, Hahn S.An optimal design of capacitor-driven coilgun[J]. IEEE Transactions on Magnetics, 1994, 30(2): 432-436. [7] Kim S, Jung H, Hahn S.Optimal design of multistage coilgun[J]. IEEE Transactions on Magnetics, 1996, 32(2): 501-505. [8] Sami B, Antonino M, Macro R, et al.Analysis of the performance of a multi-stage pulse linear induction launcher[J]. IEEE Transactions on Magnetics, 1994, 37(1): 111-115. [9] 郭赟, 鲁军勇, 关晓存, 等. 基于遗传算法的同步感应线圈发射装置参数优化[J]. 强激光与粒子束. 2014, 26(11): 115008-1-115008-7. Guo Yun, Lu Junyong, Guan Xiaocun, et al. Design optimization of synchronous induction coil electromagetic launcher based on genetic algorithm[J]. High Power Laser and Particle Beams, 2014, 26(11): 115008-1-115008-7. [10] Liu Wenbiao, Cao Yanjie, Zhang Yuan, et al.Parameters optimization of synchronous induction coilgun based on ant colony algorithm[J]. IEEE Transactions on Plasma Science, 2011, 39(1): 101-104. [11] Xiang Hongjun, Lei Bin, Li Zhiyuan, et al.Analysis of parameter sensitivity of induction coil launcher based on orthogonal experimental method[J]. IEEE Transactions on Plasma Science, 2015, 43(5): 1198-1202. [12] 金洪波, 曹延杰, 王旻, 等. 基于过载控制的多级同步感应线圈发射器优化分析[J]. 高电压技术, 2014, 40(4): 1180-1185. Jin Hongbo, Cao Yanjie, Wang Min, et al.Optimization analysis of multi-stage synchronous induction coil launcher based on overload control[J]. High Voltage Engineering, 2014, 40(4): 1180-1185. [13] Niu Xiaobo, Liu Kaipei, Zhang Yadong, et al.Multiobjective optimization of multistage synchronous induction coilgun based on NSGA-II[J]. IEEE Transactions on Plasma Science, 2017, 45(7): 1622-1628. [14] Tao Xi, Wang Shuhong, Huangfu Youpeng, et al.Geometry and power optimization of coilgun based on adaptive genetic algorithms[J]. IEEE Transactions on Plasma Science, 2015, 43(5): 1208-1214. [15] 肖贞仁, 刘开培, 牛小波, 等. 电流环暂态模型在异步感应线圈发射器中的应用[J]. 电工技术学报, 2018, 33(17): 3989-3997. Xiao Zhenren, Liu Kaipei, Niu Xiaobo, et al.Application of current loop transient model in asynchronous induction coil launcher[J]. Transactions of China Electrotechnical Society, 2018, 33(17): 3989-3997. [16] 黎镇浩, 曹全梁, 赖智鹏, 等. 电流丝法在电磁成形线圈电流和工件电磁力计算中的应用[J]. 电工技术学报, 2018, 33(18): 4181-4190. Li Zhenhao, Cao Quanliang, Lai Zhipeng, et al.Application of current filament method on the calculation of current and force in electromagnetic forming[J]. Transactions of China Electrotechnical Society, 2018, 33(18): 4181-4190. [17] 陈学慧, 曹延杰, 王成学, 等. 一种新型电磁线圈发射器的动态特性[J]. 电工技术学报, 2013, 28(5): 154-160. Chen Xuehui, Cao Yanjie, Wang Chengxue, et al.Dynamic characteristic research of a new electromagnetic coil launcher[J]. Transactions of China Electrotechnical Society, 2013, 28(5): 154-160. [18] 刘守豹, 阮江军, 杜志叶, 等. 感应线圈炮性能的场路结合分析[J]. 电工技术学报, 2010, 25(12): 1-7. Liu Shoubao, Ruan Jiangjun, Du Zhiye, et al.Analysis of inductive coil gun performance based on field coupling circuit method[J]. Transactions of China Electrotechnical Society, 2011, 25(12): 1-7. [19] 牛小波, 刘开培, 张亚东, 等. 多级同步感应线圈发射器的自适应设计研究[J]. 电工技术学报, 2018, 33(15): 3644-3650. Niu Xiaobo, Liu Kaipei, Zhang Yadong, et al.Research on adaptive design of multi-stage synchronous induction coil launcher[J]. Transactions of China Electrotechnical Society, 2018, 33(15): 3644-3650. [20] 李海涛, 张涛, 安韵竹, 等. 基于超导脉冲变压器的脉冲电源剩余能量回收方法[J]. 电工技术学报, 2019, 34(12): 2460-2467. Li Haitao, Zhang Tao, An Yunzhu, et al.Residual energy recovery method of inductive pulsed power supply based on superconducting pulse transformer[J]. Transactions of China Electrotechnical Society, 2019, 34(12): 2460-2467.
2021, Vol. 36 
