@ARTICLE{ iet:/content/journals/10.1049/iet-pel.2017.0029, author = {Xin Liu}, author = {Tianfeng Wang}, author = {Xijun Yang}, author = {Houjun Tang}, keywords = {communication elimination;load modulation;phase shift angles;local control utilisation;PSA;compact WPT system;active bridges;MATLAB;dual-side phase shift control method;voltage regulation;fault detection method;wireless power transfer system;simple control logic;Simulink simulation;stability analysis;}, ISSN = {1755-4535}, language = {English}, abstract = {Recently, efficiency improvement of wireless power transfer (WPT) systems has been the focus of research. Conventional methods of DC–DC converters are employed for load modulation to achieve high efficiency over large variations in mutual inductance and load. However, these additional circuits degrade the performance due to their inherent losses. To address this problem, this study presents a dual-side phase shift control method for load modulation and voltage regulation in a compact WPT system. The key features of the proposed work are: attaining load modulation and voltage regulation with reduced size of the system; elimination of communication between active bridges and simple control logic. Mathematical expression of equivalent resistance versus the phase shift angles (PSAs) is deduced and the optimal PSAs for maximum efficiency are presented. Utilisation of local control, stability analysis and fault detection method are included. MATLAB/Simulink simulation and experimental results are carried out to validate the proposed method.}, title = {Analysis of efficiency improvement in wireless power transfer system}, journal = {IET Power Electronics}, issue = {2}, volume = {11}, year = {2018}, month = {February}, pages = {302-309(7)}, publisher ={Institution of Engineering and Technology}, copyright = {© The Institution of Engineering and Technology}, url = {https://digital-library.theiet.org/;jsessionid=3p38snug408s9.x-iet-live-01content/journals/10.1049/iet-pel.2017.0029} }