A Self-oscillating Controller Based on Pulse Density Modulator in Wireless Power Transfer

被引：0
|
作者：
Wu, Dong [1 ]
Mai, Ruikun [1 ]
Zhao, Shiqiao [1 ]
He, Zhengyou [1 ]
Peng, Fan [1 ]
机构：
[1] Southwest Jiaotong Univ, Dept Elect Engn, Chengdu, Peoples R China
来源：
2019 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) | 2019年
关键词：
self-oscillating; pulse density modulation (PDM); wireless power transfer (WPT); SYSTEM;
D O I：
10.1109/ecce.2019.8912498
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
This paper proposed a self-oscillating controller based on pulse-density modulator (PDM) in wireless power transfer (WPT). Without utilizing additional dc/dc converter, the output voltage could be regulated by both the transmitting side inverter and receiving side rectifier. Therefore, both the system topology and controller complexity are reduced. Moreover, by detecting the zero-cross of the alternating current, the soft switching state on each switch is achieved and the switching frequency is synchronized to the system natural frequency. Thereby, the system has its maximum performance. For validation, a 350W WPT system was established. The experiment results indicate that the overall efficiency ranges from 83.5% to 93.6% of which the efficiency in buck mode are above 91.3% and in boost mode ranges from 83.5% to 92.2% respectively.
引用
收藏
页码：2125 / 2128
页数：4
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