Abstract
This paper proposes an optimized modified three-stage multipole field electromagnetic launcher with arced saddle coils and cylindrical sleeve. The equivalent circuit model and energy balance equations of a capacitor driving multipole field electromagnetic launcher are established. The energy conversion efficiency of the whole launch system is expressed with the overall efficiency and the coefficient of energy utilization. In the idealized launcher model, the electrostatic to kinetic energy conversion could be achieved with an efficiency close to 100 %. The unified analysis model of electromagnetic launch is eddy current problem with the moving conductor. An experimentally designed three-stage twisty octapole electromagnetic launcher with arced saddle coils is numerically simulated and evaluated. The results indicate that a 0.227-kg projectile is accelerated to an exit velocity of 164.66 m/s. The proposed coefficient of energy utilization of the simulation model is 2.92 %. We should cut down the resistance of the launch system to reduce the ohmic heat loss. This launch model has a potential application in military electrical guns and rocket propulsion.
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Acknowledgments
The research work was supported by National Natural Science Foundation of China under Grant No. 51207097 and Supported by Doctoral Fund of Ministry of Education of China under Grant No. 20120181120100. The authors wish to thank Prof. Dave Thomas and Assoc. Prof. Thomas Cox and Dr. Mohand Hamiti in the University of Nottingham, UK.
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Zhu, Y., Lei, Y., Zhou, Q. (2016). Analysis of Energy Conversion in Multipole Field Electromagnetic Launcher. In: Jia, L., Liu, Z., Qin, Y., Ding, R., Diao, L. (eds) Proceedings of the 2015 International Conference on Electrical and Information Technologies for Rail Transportation. Lecture Notes in Electrical Engineering, vol 377. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-49367-0_31
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DOI: https://doi.org/10.1007/978-3-662-49367-0_31
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