气隙对单槽旋转变压器能量传输效率的影响  

Effect of Energy Transfer Efficiency of Air Gap on Single Slot Rotary Transformer

作　　者：李嘉乐 魏艳龙 郝晋青[1] 梁海坚 LI Jiale;WEI Yanlong;HAO Jinqing;LIANG Haijian(College of Computer Science and Technology,Taiyuan Normal University,Jinzhong 030619,China;North University of China Soft Project Enstitute,Taiyuan 030051,China)

机构地区：[1]太原师范学院计算机科学与技术学院,山西晋中030619 [2]中北大学软件工程学院,山西太原030051

出　　处：《变压器》2024年第10期35-40,共6页Transformer

基　　金：山西省基础研究项目(202203021212185);山西省基础研究项目(20210302124541)。

摘　　要：旋转变压器(简称旋变)是保证无线电能传输系统稳定性的重要部件。封闭结构的旋变在工作时,磁心和绕组会因气隙改变产生较大感应电流和附加磁场,影响旋变散热和能量传输效率。本文作者设计利于散热的单槽含缺口的旋变,研究不同气隙下磁场强度对旋变能量传输的影响。利用COMSOL软件对不同气隙下单槽旋变的磁特性进行仿真分析,并确定气隙为2.3mm时,磁场强度达到最大值,旋变能量传输最佳。设计以单槽旋变激励压电传感器的实验,研究气隙在0~6mm范围内对超声导波的影响。实验结果表明气隙2.3mm处的超声波幅值最大,约为0.77V,单槽旋变能量传输效率最佳,提高了压电传感器发射和接收信号的强度。The rotary transformer is a crucial component in maintaining the stability of the wireless energy transmission system.When the rotary transformer with a closed structure is in operation,the magnetic core and winding generate a significant induced current and additional magnetic field due to the change in the air gap,which affects the heat dissipation and energy transfer efficiency of the rotary transformer.This paper introduces a novel single-slot notch-containing rotary transformer designed to enhance heat dissipation.The study investigates the impact of magnetic field intensity on rotational energy transfer across varying air gaps.COMSOL software is employed to simulate and analyze the magnetic properties of single-slot rotary transformers across different air gap distances.The results show that when the air gap is 2.3mm,the magnetic field intensity reaches the maximum and the rotational energy transfer is the best.The experimental setup involved the utilization of a piezoelectric sensor subjected to single slot rotation excitation,aimed at investigating the effects of varying air gaps on ultrasonic guided waves within the 0~6mm range.Experimental findings indicate that reflected wave amplitudes at the 2.3mm air gap reached 0.77V.The proposed single-slot rotary variable demonstrates superior performance in energy transfer,thereby enhancing the transmitting and receiving signal strengths of piezoelectric transducers.

关 键 词：旋转变压器 气隙 磁特性 压电传感器 

分 类 号：TM401.1[电气工程—电器]