Title :
A high-efficiency Class-E power amplifier with wide-range load in WPT systems
Author :
Shuangke Liu ; Ming Liu ; Minfan Fu ; Chengbin Ma ; Xinen Zhu
Author_Institution :
Univ. of Michigan-SJTU Joint Inst., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
A high-efficiency power amplifier (PA) is important in a Megahertz wireless power transfer (WPT) system. It is attractive to apply the Class-E PA for its simple structure and high efficiency. However, the conventional design for Class-E PA can only ensure a high efficiency for a fixed load. It is necessary to develop a high-efficiency Class-E PA for a wide-range load in WPT systems. A novel design method for Class-E PA is proposed to achieve this objective in this paper. The PA achieves high efficiency, above 80%, for a load ranging from 10 to 100 Ω at 6.78 MHz in the experiment.
Keywords :
inductive power transmission; power amplifiers; WPT systems; class-E PA; class-E power amplifier; wireless power transfer system; Design methodology; Impedance; Load management; Load modeling; Power amplifiers; Power generation; Wireless communication; Class-E power amplifier; Wireless power transfer; impedance transformation; load-pull; wide-range load;
Conference_Titel :
Wireless Power Transfer Conference (WPTC), 2015 IEEE
Conference_Location :
Boulder, CO
DOI :
10.1109/WPT.2015.7140140
