The Application of Electromagnetic Coil Launching Technology in Non-war Military Operations AC Machines

Li, Zhiyuan; Wang, Jingchao; Zhang, Xiaojuan

doi:10.1007/978-981-19-1870-4_5

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…The main applications of reluctance coil launchers include: 1) Reluctance coil guns (RCG), which has the advantage of adjustable power compared to gunpowder firearms [7], [8] and also guarantees a higher rate of fire and stability compared to pneumatic firearms. 2) The split Hopkinson pressure bar (SHPB) device with EM loading method has many advantages over traditional pneumatic loading, such as low noise, high energy conversion rate, and easy miniaturization [9], [10].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Reluctance Coil Launchers Driven by Distributed Feeder Circuit

Lu,

Yi,

Yuan

et al. 2024

IEEE Access

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Reluctance coil launchers usually use a pulse current formed by capacitive discharge to excite the excitation coil when launching. The pulse current peaks are high, and the projectile usually undergoes deep magnetic saturation, resulting in low launching efficiency. To address this problem, this article proposes using distributed feeder circuit to drive reluctance coil launchers, replacing the traditional single set of large-capacity capacitor discharge scheme with multiple small-capacity capacitors discharged in a time-sequential manner, so as to reduce the peak current and suppress magnetic saturation problems. The study includes two main aspects, one is to study the effect of the driving method on the launch performance and analyze the reasons; the other is to propose the calculation of the time-varying data in the launch process by the time-segmented calculation method. The efficiency of the model described in the paper is only 1.301% when using a single high-capacity capacitor for launching, while the launching efficiency is increased to 3.535% when driven by the distributed feeder circuit, indicating that the method can effectively improve the launching performance.INDEX TERMS Reluctance coil launcher, magnetic saturation, distributed feeder circuit, flat-topped wave current, time-segmented calculation method.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of Reluctance Coil Launchers Driven by Distributed Feeder Circuit

Lu,

Yi,

Yuan

et al. 2024

IEEE Access

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Specified Velocity Launching of Reluctance Coil Gun Based on Genetic Algorithm

Zhang

2024

IEEE Access

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In this study, a method is proposed to obtain the initial voltage of the capacitor and the initial relative position of the projectile of a reluctance coil gun using a genetic algorithm to make the projectile launch at a specified muzzle velocity with high efficiency. Firstly, the equivalent inductance change during the launching process is used as a link for multi-physics field analysis, and a set of electromagnetic dynamics equations is derived to correct the effect of magnetic saturation on the inductance according to the current value in the coil. Further the set of equations is constructed as a Simulink discretized numerical computational program and called by a genetic algorithm written in MATLAB to approximate the optimal solution by generation-by-generation optimization. When the specified projectile muzzle velocity is set to 10 m/s, the initial voltage of the capacitor calculated using the genetic algorithm is 156 V, and the initial position of the projectile is −14.3 mm. We input the parameters into the finite element analysis model and the launch experiment platform, and the obtained projectile muzzle velocity is 9.67 m/s and 9.8 m/s respectively, and the efficiency is close to the optimal value, also the comparison of voltage and current waveforms also shows that the method proposed in this study is effective.INDEX TERMS reluctance coil gun, equivalent inductance, genetic algorithm, specified muzzle velocity, launching efficiency.

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A Reverse Electromagnetic Force Suppression Circuit and Its Control Method for Reluctance Coil-Gun

Zhang

2023

IEEE Trans. Plasma Sci.

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The Application of Electromagnetic Coil Launching Technology in Non-war Military Operations AC Machines

Cited by 3 publications

References 2 publications

Performance Analysis of Reluctance Coil Launchers Driven by Distributed Feeder Circuit

Performance Analysis of Reluctance Coil Launchers Driven by Distributed Feeder Circuit

Specified Velocity Launching of Reluctance Coil Gun Based on Genetic Algorithm

A Reverse Electromagnetic Force Suppression Circuit and Its Control Method for Reluctance Coil-Gun

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