基于磁场方向变化的同步感应线圈发射器效率提升分析

doi:10.19595/j.cnki.1000-6753.tces.191570

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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.

Key words： Synchronous induction coilgun magnetic field direction current distribution launching performance

Received: 20 November 2019

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TM303

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	Zhang Tao
	Guo Wei
	Su Zizhou
	Liu Yong
	Fan Wei

Cite this article:

Zhang Tao,Guo Wei,Su Zizhou等. Analysis of Improving Efficiency on Synchronous Induction Coilgun Based on the Directional Change of Magnetic Field[J]. Transactions of China Electrotechnical Society, 2021, 36(3): 517-524.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191570 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I3/517

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