Output-Power-Controllable Parity-Time-Symmetric Wireless Power Transfer System With Soft Switching for Kitchen Appliances

IF 4.3 2区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Consumer Electronics Pub Date : 2024-09-30 DOI:10.1109/TCE.2024.3470112

Lihao Wu;Bo Zhang;Yanwei Jiang

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Abstract

In this paper, using dual-frequency modulation (DFM) and phase synchronization method (PSM), a flexible and controllable wireless power transfer (WPT) system with soft switching based on parity-time (PT) symmetry is proposed for kitchen appliances. Here, the system outputs can be regulated by configuring the number ratio of two modulation pulses with different frequencies, without the need for extra DC-DC converters or changing the duty cycle of the inverter. Moreover, a control method for generating and arranging the hybrid frequencies pulse sequence is proposed based on PSM to satisfy the condition of PT symmetry. Theoretical analysis indicates that a controllable output power insensitive to the coupling coefficient can be acquired only by relying on a single-stage inverter while maintaining soft-switching or zero-voltage switching (ZVS) operation, thereby reducing power losses and improving system cost-effectiveness and integration. Furthermore, dual-side communication can be eliminated. The results of the experiment confirm that a controllable stable output power with a constant coil-coil efficiency of 95.8% and a peak DC-to-load efficiency of 93.8% can be maintained within a lateral tolerance range of 0-14 cm.

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带软开关的厨房电器输出功率可控奇偶时间对称无线电力传输系统

本文采用双频调制（DFM）和相位同步（PSM）方法，提出了一种基于奇偶时间（PT）对称的柔性可控无线电力传输（WPT）系统。在这里，可以通过配置两个不同频率的调制脉冲的数比来调节系统输出，而不需要额外的DC-DC变换器或改变逆变器的占空比。此外，提出了一种基于PSM的混合频率脉冲序列产生和排列的控制方法，以满足PT对称的条件。理论分析表明，在保持软开关或零电压开关（ZVS）运行的情况下，仅依靠单级逆变器即可获得对耦合系数不敏感的可控输出功率，从而降低功率损耗，提高系统的成本效益和集成度。此外，可以消除双向通信。实验结果证实，在0 ~ 14 cm的横向容差范围内，可保持稳定可控的输出功率，线圈-线圈效率为95.8%，峰值直流-负载效率为93.8%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Consumer Electronics 工程技术-电信学

CiteScore

7.70

自引率

9.30%

发文量

审稿时长

3.3 months

期刊介绍： The main focus for the IEEE Transactions on Consumer Electronics is the engineering and research aspects of the theory, design, construction, manufacture or end use of mass market electronics, systems, software and services for consumers.