A simple approach for load identification in current-fed inductive power transfer system
A simple approach for load identification in current-fed inductive power transfer system
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DOI：
10.1109/powercon.2012.6401305
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发表时间：
2012-10
期刊：
影响因子：
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通讯作者：
Zhihui Wang;Xiao Lv;Yue Sun;X. Dai;Yu-peng Li
中科院分区：
文献类型：
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作者：
Zhihui Wang;Xiao Lv;Yue Sun;X. Dai;Yu-peng Li
在感应电能传输（IPT）系统中，为了设计系统控制器，需要对系统参数进行动态辨识。本文提出了一种简单易实现的电流型IPT系统中负载位置和负载电阻的辨识方法。该方法基于原边谐振回路的能量平衡方程。进一步分析了零电压开关频率和励磁电流的特性，得出当负载位置或参数变化时，零电压开关频率基本稳定，励磁电流基本恒定。因此，建立了只需要对直流输入电流进行采样的最终辨识方法，避免了复杂的系统建模和对高速采样系统的要求。最后通过实验验证了该方法简单、成本低，能够准确识别负载位置和负载电阻。
In inductive power transfer (IPT) system, system parameters dynamical identification is required in order to design system controller. This paper presents a simple and easily-realized method for identifying the location and resistance of load in current-fed IPT system. The method is based on the energy equilibrium equations in primary resonant tank. By further analyzing the characteristics of zero-voltage-switching (ZVS) frequency and exciting current, it can be known that the ZVS frequency is nearly steadiness and the exciting current is constant when load location or parameter varies. Therefore, the final identification method is set up which is only required sampling the DC input current to avoid complex system modeling and requirements of high speed sampling system. Finally experiment has verified the method which is much simple and low-cost for identifying the location and resistance of load accurately.