Feedback analysis and design of inductive power links driven by Class-E amplifiers with variable coupling coefficients
Feedback analysis and design of inductive power links driven by Class-E amplifiers with variable coupling coefficients作者机构：Institute of Intelligent Mechatronics Research School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China
出 版 物：《Journal of Zhejiang University-Science C(Computers and Electronics)》 (浙江大学学报C辑（计算机与电子（英文版）)
年 卷 期：2010年第11卷第8期
页 面：629-636页
核心收录：
学科分类：0810[工学-信息与通信工程] 080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：Project (No.60271031) supported by the National Natural Science Foundation of China
主 题：Inductive power link Closed-loop Class-E amplifier High efficient Variable coupling coefficient
摘 要：The efficiency of inductive power links driven by Class-E amplifiers may deteriorate due to variation in the coupling coefficient when the relative position of the radio frequency (RF) coils *** solve this problem,a new design methodology of power links is presented in this *** aim of the new design is to use the feedback signal,which is a phase difference between the driving signal and the output current of the Class-E amplifier,to adjust the duty cycle and angular frequency of the driving signal to maintain the optimum state of the inductive power link,and to adjust the supply voltage to keep the output power constant when the coupling coefficient of the RF coils *** parameter adjustments with respect to the coupling coefficient and the feedback signal are derived from the design equation of the inductive power *** validate the feedback control rules,a prototype of the inductive power link was constructed,and its performance validated with the coupling coefficient set at 0.2 and a duty cycle of *** experimental results showed that,by adjusting the duty cycle,the angular frequency,and the supply voltage,the power link can be kept in optimal operation with a constant output power when the coupling coefficient changes from 0.2 to 0.1 to 0.25.
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