运动设备无接触供电系统耦合特性的研究

本文采用磁通方法和诺伊曼公式研究了不同形状线圈自感以及线圈间发生位移时互感的计算,进一步分析研究了初、次级线圈的形状和尺寸对耦合变化特性的影响,最后通过实验研究,验证了分析所得结果.实验和计算结果均表明,运动设备无接触供电系统采用矩形线圈对于稳定耦合性能更为有效,稳定性主要由线圈宽度和初、次级长度比决定.线圈越窄,初、次级长度比越大,稳定性越好.

Study on coupling characteristics of contactless power supply system for moving apparatus

New contactless power supply system implements contactless power transmission by the combination of electromagnetic inductive coupling and power electronic technology. For moving apparatus air coil structures have some potential advantages over the iron core structures, such as, lightweight, good coupling stability with horizontal displacement etc. This paper does the calculations of self-inductance for coils with different shape and mutual inductances between coils with displacement by the magnetic flux method and Neumann's formula. Further study has been given on the effect that the coil shape and dimensions have on the coupling change characteristics. Finally the results acquired have been validated by the experimental research. The experimental and calculated results show that the rectangular coil is more effective for stabilizing the coupling in the contactless power supply system for moving apparatus, which is mainly determined by the coil width and the length ratio between the primary and the secondary. The smaller the width and the larger the length ratio, the better the coupling characteristic with displacement.