A Constant Current and Constant Voltage Dual-Output Wireless Power Transfer System Based on Receiving Side Decoupling: Analysis, Design, and Verification

IF 1.6 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Circuit Theory and Applications Pub Date : 2025-04-06 DOI:10.1002/cta.4528

Le Yu, Shujia Xu, Xuebin Zhou, Lin Yang, Ran Li, Xiaoyu Zhang

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引用次数: 0

Abstract

In order to solve the problem that the automatic guided vehicle requires load-independent constant current (CC) and constant voltage (CV) dual-type outputs, it is necessary to design a dual-output wireless power transfer (WPT) system with different output types. However, the existing dual-output WPT systems have problems such as unnecessary cross-coupling, limited space utilization, and complex control methods; therefore, this paper proposes a CC and CV dual-output WPT system based on receiving side decoupling. In the system, the transmitting side coil uses a Q-type coil and a solenoid coil that are connected in series and wound vertically, and the receiving side coil uses a Q-type coil and a solenoid coil that are independent and perpendicular to each other; the mutually perpendicular Q-coil and solenoid coils are naturally decoupled, thus eliminating the effects of cross coupling in the system. First, the decoupling characteristics of the proposed magnetic coupler are analyzed in detail. Second, a mathematical model is established based on the decoupling of the magnetic coupler, and the load-independent output characteristics of the dual-output WPT system and the input impedance showing pure resistance characteristics are derived in detail. Then, the output characteristics under ZPA conditions that can be achieved by the system are further verified through simulation analysis. In addition, in order to reduce the conduction loss of the switch tube in the system, the influence of the change of compensation component parameters on the realization of zero voltage switching is analyzed through normalized simulation. Finally, an experimental prototype is built, achieving CC output of 3.5 A and CV output of 70 V, verifying the correctness of the above theoretical analysis. In addition, when the first receiving side load $R_{B 1}$ is 30 $Ω$ and the second receiving side load $R_{B 2}$ is 19 $Ω$ , the peak efficiency can reach 92.6%.

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基于接收侧解耦的恒流恒压双输出无线电力传输系统：分析、设计与验证

为了解决自动制导车辆需要与负载无关的恒流（CC）和恒压（CV）双输出的问题，有必要设计一种不同输出类型的双输出无线电力传输（WPT）系统。然而，现有的双输出WPT系统存在不必要的交叉耦合、空间利用率有限、控制方法复杂等问题；因此，本文提出了一种基于接收侧解耦的CC和CV双输出WPT系统。在该系统中，发射侧线圈采用串联、垂直绕线的q型线圈和电磁线圈，接收侧线圈采用相互独立、垂直的q型线圈和电磁线圈；相互垂直的q线圈和电磁线圈自然解耦，从而消除了系统中交叉耦合的影响。首先，详细分析了该磁力耦合器的解耦特性。其次，建立了基于磁耦合器解耦的数学模型，详细推导了双输出WPT系统与负载无关的输出特性和纯电阻特性的输入阻抗。然后，通过仿真分析进一步验证了系统在ZPA条件下可以实现的输出特性。此外，为了降低系统中开关管的导通损耗，通过归一化仿真分析了补偿元件参数的变化对零电压开关实现的影响。最后搭建了实验样机，实现了CC输出3.5 A， CV输出70 V，验证了上述理论分析的正确性。当第一接收侧负载rb1为30 Ω，第二接收侧负载rb2为19 Ω时，效率峰值可达92.6%。

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来源期刊

International Journal of Circuit Theory and Applications 工程技术-工程：电子与电气

CiteScore

3.60

自引率

34.80%

发文量

277

审稿时长

4.5 months

期刊介绍： The scope of the Journal comprises all aspects of the theory and design of analog and digital circuits together with the application of the ideas and techniques of circuit theory in other fields of science and engineering. Examples of the areas covered include: Fundamental Circuit Theory together with its mathematical and computational aspects; Circuit modeling of devices; Synthesis and design of filters and active circuits; Neural networks; Nonlinear and chaotic circuits; Signal processing and VLSI; Distributed, switched and digital circuits; Power electronics; Solid state devices. Contributions to CAD and simulation are welcome.