Autonomous Wireless Power Transfer System with Constant Output Voltage in a Wide Load Range

Yanwei Jiang, Xiaoguang Zhao, Dongliang Chen, Xujian Shu () and Yang Zhou
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Yanwei Jiang: School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Xiaoguang Zhao: School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Dongliang Chen: State Grid Fujian Electric Power Co., Ltd. Zhangping Power Supply Company, Longyan 364400, China
Xujian Shu: School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Yang Zhou: School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China

Energies, 2023, vol. 16, issue 24, 1-14

Abstract: In this paper, an autonomous wireless power transfer (WPT) system with constant voltage output in a wide load range is presented. Here, combining self-oscillating control and phase-shift control, a new implementation of the autonomous WPT system is proposed. The proposed autonomous WPT system operates using a self-oscillating control method in the strong coupling region, which can automatically maintain the constant output voltage. In the weak coupling region, a phase-shift control method with a fixed frequency and a variable duty cycle is implemented, and a control strategy based on output voltage estimation is proposed to obtain the constant output voltage. In addition, according to the operating frequency characteristic of the proposed autonomous WPT system, a corresponding coupling region judgment method is presented to guarantee the realization of switching between the two control methods. An experimental prototype with a 24 V output voltage is constructed to validate the practicability of the proposed method. The experimental results show the proposed autonomous WPT system can obtain constant output voltage in a wide load range.

Keywords: wireless power transfer; autonomous system; self-oscillating control; phase-shift control; constant voltage (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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