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无线电能传输技术凭借无直接电气接触的优点,在现代有轨电车得到应用。在这样的大功率应用对象中,效率是影响系统性能的重要因素,线圈设计更是首要考虑的内容。不同于其它应用对象,现代有轨电车停车误差只存在于一个方向,且偏移误差符合正态分布规律。针对这一特征,以满足额定输出功率为前提,提出线圈效率期望作为优化目标,将有轨电车线圈安装尺寸、器件应力等指标作为约束条件。同时,提出增长原边线圈的方式提高副边线圈的偏移特性,采用群举法对矩形线圈的长度、宽度、匝数等进行了优化。最后得到在停车偏移误差离呈现正态分布状况下,线圈的效率期望最优的结果,并对结果进行了实验验证。
Wireless electric transmission technology is used in modern trams with the advantage of no direct electrical contact. In such high-power applications, efficiency is an important factor affecting the system performance, coil design is the primary consideration. Unlike other applications, the parking error of modern tram stops only in one direction, and the deviation error is in accordance with the normal distribution law. In view of this feature, to meet the rated output power as a prerequisite for the proposed coil efficiency expectations as an optimization goal, the tram coil size, device stress and other indicators as a constraint. At the same time, the method of increasing the primary coil is proposed to improve the offset characteristic of the secondary coil, and the length, width and number of turns of the rectangular coil are optimized by cluster method. In the end, the expected optimal efficiency of the coil under the normal distribution of parking error is obtained, and the experimental results are validated.