基于暂态特征参数的数字式非接触负载测量研究  

Research on Digital Contactless Load Measurement Based on Characteristic Parameters in Transient Process

作　　者：朱正斌 黄军[2] 牛剑锋 孟洋洋 胡斯登[1] ZHU Zhengbin;HUANG Jun;NIU Jianfeng;MENG Yangyang;HU Sideng(College of Electrical Engineering,Zhejiang University,Hangzhou 310000,China;Shanghai Institute of Space Power Sources,Shanghai 201109,China)

机构地区：[1]浙江大学电气工程学院,杭州310000 [2]上海空间电源研究所,上海201109

出　　处：《电源学报》2024年第1期222-228,共7页Journal of Power Supply

基　　金：上海航天科技创新基金资助项目(SAST2017-136);中央高校基本科研业务费专项资金资助项目(2020XZZX005-02)。

摘　　要：无线能量传输系统暂态过程中的高阶非线性问题是负载测量和辨识的一个难点,在处理由于高阶非线性出现的拍频信号时,现有模拟包络检波方法存在信号易失真、电路灵活性差以及测量范围有限等问题。针对此,提出基于希尔伯特变换的数字包络检波方法。在希尔伯特变换的基础上,设计数字包络检波器,提取电压拍频信号的包络线,并通过仿真和实验对所提方法进行验证,结果表明:对于不同待测负载,该方法均能够准确提取电压拍频包络线,实现负载阻值1~2000Ω范围内误差小于5%的测量。该方法拓宽了基于暂态特征参数的非接触负载测量的范围,为无人机等飞行器电池内阻的测量提供了新思路。The problem of high-order nonlinearity in the transient process of a wireless power transmission system is a difficulty in load measurement and identification.When dealing with beat-frequency signals due to the high-order nonlinearity,there are some problems in the existing analog envelope detection method,such as signal distortion,poor circuit flexibility,and limited measurement range.Aimed at these problems,a digital envelope detection method was proposed based on Hilbert transform,and a digital envelope detector was designed to extract the envelope of the voltage beat-frequency signal.In addition,simulations and experiments were conducted to validate the proposed method.Results show that this method can accurately extract the envelope of the voltage beat-frequency signal with different loads,and it achieved an error of less than 5%in the load resistance range of 1-2000Ω.The proposed method extends the contactless load measurement range based on characteristic parameters in the transient process,providing a new idea for measuring the internal resistance of batteries in aircraft such as unmanned aerial vehicles.

关 键 词：无线能量传输 负载测量与辨识 希尔伯特变换 数字包络检波 

分 类 号：TM932[电气工程—电力电子与电力传动]