Steady-State Transfer Performance Analysis of a Multi-Load Pseudo-Hermitian Wireless Power Transfer System

LIANG Zhijiang; YANG Lihui; YIN Shuli; MA Xikui

doi:10.7652/xjtuxb202609005

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Steady-State Transfer Performance Analysis of a Multi-Load Pseudo-Hermitian Wireless Power Transfer System

更新时间：2026-09-04

- Steady-State Transfer Performance Analysis of a Multi-Load Pseudo-Hermitian Wireless Power Transfer System
- Journal of Xi'an Jiaotong University Vol. 60, Issue 9, Pages: 39-49(2026)
- 作者机构：
  
  西安交通大学电工材料电气绝缘全国重点实验室，710049，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202609005
  CLC： TM724
- Received：16 January 2026，
  
  Online First：19 May 2026，
  
  Published：10 September 2026
- 稿件说明：
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LIANG Zhijiang, YANG Lihui, YIN Shuli, et al. Steady-State Transfer Performance Analysis of a Multi-Load Pseudo-Hermitian Wireless Power Transfer System[J]. Journal of Xi'an Jiaotong University,2026,60 (9):39-49. https://doi.org/10.7652/xjtuxb202609005.
DOI：

LIANG Zhijiang, YANG Lihui, YIN Shuli, et al. Steady-State Transfer Performance Analysis of a Multi-Load Pseudo-Hermitian Wireless Power Transfer System[J]. Journal of Xi'an Jiaotong University,2026,60 (9):39-49. https://doi.org/10.7652/xjtuxb202609005. DOI：

摘要

针对多负载宇称-时间（PT）对称无线电能传输系统对耦合线圈品质因数要求较高，导致系统成本增加的问题，提出一种接收端彼此解耦的多负载赝厄米无线电能传输系统。以双负载赝厄米系统为例，通过设定发射端自然谐振频率高于接收端，并采用Bang-Bang控制使系统在强耦合区内工作于目标本征模式，研究了打破PT对称性对系统稳态传输性能的影响。理论结果表明：稳态时系统接收端谐振网络能量幅值高于发射端，改善了两端能量的分布；相较于PT对称无线电能传输系统，两端能量分布的改善可以削弱发射线圈交流电阻对传输效率的不利影响，从而取得更高传输效率；相较于单负载赝厄米系统，当系统同时为两个负载供电时，其强耦合区将得到扩展，这一结论可推广至多负载赝厄米系统中。实验结果表明：即使发射线圈品质因数较低，若通过打破PT对称性以实现两端能量分布的改善，则双负载系统稳态传输效率可由82.7%提高至89.9%，表明在强耦合区内，系统可取得与采用高品质因数发射线圈的PT对称系统相近的传输效率。

Abstract

To address the increased system cost caused by the high quality-factor requirements for coupled coils in multi-load parity-time（PT）-symmetric wireless power transfer（WPT）systems

a multi-load pseudo-Hermitian WPT system with mutually decoupled receivers is proposed.A dual-load pseudo-Hermitian system is taken as an example.By setting the natural resonant frequency of the transmitter higher than that of the receivers and using Bang-Bang control to operate the system in the target eigenmode within the strong-coupling region

the effect of PT-symmetry breaking on the steady-state transfer performance is investigated.Theoretical results show that the energy amplitude of the receiver-side resonant network is higher than that of the transmitter-side under steady-state conditions

thereby improving the energy distribution between the two sides.Compared with the PT-symmetric WPT system

the improved energy distribution reduces the adverse effect of the AC resistance of the transmitter coil on the transfer efficiency

resulting in higher transfer efficiency.Compared with the single-load pseudo-Hermitian system

the strongcoupling region is extended when two loads are charged simultaneously

and this conclusion can be extended to multi-load pseudo-Hermitian systems.Experimental results show that even with a low-quality-factor transmitter coil

the steady-state transfer efficiency of the dual-load system is increased from 82.7% to 89.9% by breaking PT symmetry and improving the energy distribution between the two sides.Thus

within the strong-coupling region

a transfer efficiency comparable to that of a PT-symmetric system using a high-quality-factor transmitter coil is achieved.

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references

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