Autonomous Pulse Frequency Modulation for Wireless Battery Charging With Zero-Voltage Switching

被引：20
作者：
Hua, Zhichao [1 ]
Chau, K. T. [1 ]
Liu, Wei [1 ]
Tian, Xiaoyang [1 ]
Pang, Hongliang [1 ]
机构：
[1] Univ Hong Kong, Dept Elect & Elect Engn, Hong Kong, Peoples R China
来源：
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2023年 / 70卷 / 09期
关键词：
Autonomous frequency; battery charging; pulse frequency modulation (PFM); self-excited oscillation; wireless power transfer (WPT); zero-voltage switching (ZVS); POWER TRANSFER SYSTEMS;
D O I：
10.1109/TIE.2022.3215814
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This article proposes an autonomous pulse frequency modulation (APFM) scheme for wireless battery charging in which the self-excited oscillating (SEO) wireless power transfer (WPT) system can offer output power regulation with reliable zero-voltage switching (ZVS). The key is to utilize the self-excited oscillation feature to adjust the WPT operating frequency autonomously so as to deliver more power in the strong coupling region than the traditional forced oscillating (FO) WPT system while the transmission efficiency can maintain at a high level. In the weak coupling region, the system becomes equivalent to the FO-WPT system. The pulse frequency modulation enables the system to adjust the output power by changing its duty ratio. Besides, reliable ZVS is achieved by extracting and processing the current signal at the primary side. Both theoretical analysis and experimental verification are provided to support the feasibility of the proposed APFM for SEO-WPT system.
引用
收藏
页码：8959 / 8969
页数：11
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