测控技术2025，Vol.44Issue(7)：42-48,57,8.DOI:10.19708/j.ckjs.2025.04.225
变压器巡检机器鱼无线充电系统互感识别方法
Mutual Inductance Identification Method for Wireless Charging Systems of Transformer Inspection Robotic Fish
摘要
Abstract
To address the issue of difficulty in directly observing internal defects in large transformers,an in-spection robotic fish is used for internal visual inspection.Considering the need for prolonged inspection by mi-cro-robotic fish,continuous power supply becomes a critical issue for completing the inspection task.Wireless power transfer(WPT)technology offers a viable charging solution.However,the positional variations between the energy transmission coil and the receiving coil of the inspection robotic fish significantly impact the char-ging efficiency and power of the system.Therefore,effectively identifying the mutual inductance and equivalent load value of the wireless charging system becomes a core issue for enhancing system efficiency.To address this,a mutual inductance identification method for the wireless charging system of the transformer inspection robotic fish based on relay coil switching is proposed.This method effectively identifies the mutual inductance and load value between coils by merely detecting the system input impedance vector before and after the relay coil is switched into and out of the system.Experiments demonstrate the high efficiency and accuracy of the proposed method.When the load resistance varies between 10～30 Ω and the lateral offset of the load coil va-ries within the range of 0～50 mm,the error in mutual inductance between coils remains approximately 1 μH,and the error in load resistance is around 2 Ω.关键词
变压器/巡检机器鱼/无线充电/互感识别Key words
transformer/inspection robotic fish/wireless charging/mutual inductance identification分类
信息技术与安全科学引用本文复制引用
刘力卿,张弛,顿超,李杰,边胜利,季洪鑫..变压器巡检机器鱼无线充电系统互感识别方法[J].测控技术,2025,44(7):42-48,57,8.基金项目
国网天津市电力科技项目(电科-研发23-40) （电科-研发23-40）
