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标题：感应型直线电磁驱动器耦合特性及控制优化研究 |
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作者：江明阳，王豫，董亮，等 |
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| 2017年第10期 访问次数：264次 |
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摘要：为了研究多级同步感应型直线电磁驱动器的级间耦合效应，将其以感应电动势反映到电路模型中,仿真分析了电枢速度和驱动线圈级间距离对感应电动势的影响。研究结果表明:随着电枢速度增加以及驱动线圈的级间距离减小，抛体上的涡流在后级驱动线圈中感应的反向电动势逐渐增强,从而降低后级驱动线圈中的电流和电枢的加速力。在此基础上提出了一种控制策略,通过控制外电路开关的闭合时间来抑制电枢上反向涡流,减小后级驱动线圈中反向感应电动势,并通过数值仿真对4级同步感应型直线电磁驱动器进行了研究，结果表明优化外电路情况下的电磁驱动器的加速力增大，系统发射效率提高。
关键词：电磁发射;感应电动势;外电路控制策略;发射效率
Abstract: Introduced the launch physics of Synchronous linear induction electromagnetic drives, established the equivalent circuit model of multistage induction coil gun, which can reflect the characteristics of interstage coupling by the induced electromotive force. Based on the electromagnetic field finite element computation, the induced electromotive force was analyzed by transient simulation for the influence of armature’s speed and the distance between the drive coils. The simulation result indicated that the induced electromotive force was gradually enhanced with the increase of the armature speed and the decrease of the distance between the drive coils. On the basis, put forward a new control strategy for the external circuit and took a simulation of 4 stage induction coilgun. The results confirm that this optimized strategy has higher force and efficiency than unoptimized strategy.
Key words: ordnance science and technology；induced electromotive force; external circuit control strategy；emission efficiency |
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