基于三线圈合成算法的WPT-EV拾取定位技术

Pick-up position detection for WPT-EV based on three-coil synthesis algorithm

针对无线供电电动车(WPT-EV)在通电导轨上运行时偏移角度会影响电能的传输能力,而传统的电磁引导定位方法只能进行路径选择且精度较低等问题,提出基于三线圈合成算法的电动车无线供电系统定位方法.通过分析WPT-EV在行驶过程中检测线圈拾取电压的变化趋势,利用模糊算法对偏移方向和偏移程度进行分析判断,能够实时地获得WPT-EV的偏移状态,实现利用3个线圈对WPT-EV进行定位.通过实验平台的搭建,验证了该定位方式的可行性.结果表明,该方式为WPT-EV与导轨对中,为达到最强能量提供一条有效途径,具有结构简单、成本低、灵敏度高、可操作性强等特点.

When the wireless powered electric vehicles （WPT-EV） operate on the electrified rails, thedeviation angle between vehicle and rail can effect the efficiency of electric power transfer, and thetraditional method of electromagnetic guided positioning is designed for path tracking with a lowpositioning accuracy. A novel position detection method for the WPT-EV based on a three-coil synthesisalgorithm was proposed to solve these problems, The location of the WPT-EV can be determined based onthe variation trend of the voltages induced in three small pick-up coils, Direction and degree of deviationcan be determined based on fuzzy algorithm. The method based on three-coil synthesis algorithm canobtain the deviation position between WPT-EV and rail in real time. Experimental results agreed with thetheoretical analysis, which showed the effectiveness of the proposed method. An effective way for helpingalign WPT-EV and rail was provided to achieve maximum power transfer. The proposed method has theadvantage of simple structure, low cost, high sensitivity and strong operability.