Active-Load-Decoupling Based Online Mutual Inductance Estimation for Bidirectional Inductive Wireless Power Transfer Systems

IF 8.3 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Transportation Electrification Pub Date : 2024-10-08 DOI:10.1109/TTE.2024.3476330

Hang Zhang;Tingyi Jiang;Jingrong Yu;Chen Peng;Wenhao Yang;Hankang Tian

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Abstract

Mutual inductance greatly impacts the performance of bidirectional inductive wireless power transfer (BD-WPT) systems, yet it is usually unknown due to the uncertain position of the coils or some environmental variations. To acquire the mutual inductance online, this article proposes an online mutual inductance estimation method. This method constructs a virtual circuit and uses coordinate transformation to decouple the active load on the secondary of the system equivalently. Based on this active load decoupling idea, the estimation model of the mutual inductance is simplified in the time domain, and the primary-side online fast estimation of mutual inductance is implemented by only sampling the primary ac current. Verifications are provided by the experimental results of the prototype BD-WPT system. Compared with the existing methods for BD-WPT systems, the proposed method is load-information-free, and it achieves online mutual inductance estimation rapidly and accurately. And no communication, additional switches, or auxiliary circuits are required.

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基于有源负载去耦的双向感应式无线电力传输系统在线互感估计

互感对双向感应无线电力传输系统的性能影响很大，但由于线圈位置的不确定或环境的变化，互感通常是未知的。为了在线获取互感，本文提出了一种互感在线估计方法。该方法构造虚电路，利用坐标变换对系统二次有功负荷进行等效解耦。基于这种有源负载解耦思想，在时域上简化了互感估计模型，通过对一次交流电流进行采样，实现了一次侧互感在线快速估计。通过样机BD-WPT系统的实验结果进行了验证。与现有的BD-WPT系统互感估计方法相比，该方法不含负载信息，能够快速准确地实现在线互感估计。而且不需要通信、额外的开关或辅助电路。

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来源期刊

IEEE Transactions on Transportation Electrification Engineering-Electrical and Electronic Engineering

CiteScore

12.20

自引率

15.70%

发文量

449

期刊介绍： IEEE Transactions on Transportation Electrification is focused on components, sub-systems, systems, standards, and grid interface technologies related to power and energy conversion, propulsion, and actuation for all types of electrified vehicles including on-road, off-road, off-highway, and rail vehicles, airplanes, and ships.