Efficient and stable wireless power transfer based on the non-Hermitian physics

doi:10.1088/1674-1056/ac3815

中国物理B ›› 2022, Vol. 31 ›› Issue (1): 10307-010307.doi: 10.1088/1674-1056/ac3815

所属专题： SPECIAL TOPIC — Non-Hermitian physics

Efficient and stable wireless power transfer based on the non-Hermitian physics

Chao Zeng(曾超)¹, Zhiwei Guo(郭志伟)^1,†, Kejia Zhu(祝可嘉)², Caifu Fan(范才富)¹, Guo Li(李果)¹, Jun Jiang(江俊)³, Yunhui Li(李云辉)¹, Haitao Jiang(江海涛)¹, Yaping Yang(羊亚平)¹, Yong Sun(孙勇)^1,‡, and Hong Chen(陈鸿)^1,§

1 MOE Key Laboratory of Advanced Micro-structured Materials, School of Physics Sciences and Engineering, Tongji University, Shanghai 200092, China;
2 Department of Electrical Engineering, Tongji University, Shanghai 201804, China;
3 School of Automotive Studies, Tongji University, Shanghai 210804, China

收稿日期:2021-08-27 修回日期:2021-11-03 接受日期:2021-11-10 出版日期:2021-12-03 发布日期:2021-12-28
通讯作者: Zhiwei Guo, Yong Sun, Hong Chen E-mail:2014guozhiwei@tongji.edu.cn;yongsun@tongji.edu.cn;hongchen@tongji.edu.cn
基金资助:
This research was supported by the National Key Research and Development Program of China (Grant No. 2016YFA0301101), the National Natural Science Foundation of China (Grant Nos. 91850206, 61621001, 2004284, 11674247, and 11974261), Shanghai Science and Technology Committee, China (Grant Nos. 18JC1410900 and 18ZR1442900), the China Postdoctoral Science Foundation (Grant Nos. 2019TQ0232 and 2019M661605), the Shanghai Super Postdoctoral Incentive Program, and Fundamental Research Funds for the Central Universities, China.

Efficient and stable wireless power transfer based on the non-Hermitian physics

1 MOE Key Laboratory of Advanced Micro-structured Materials, School of Physics Sciences and Engineering, Tongji University, Shanghai 200092, China;
2 Department of Electrical Engineering, Tongji University, Shanghai 201804, China;
3 School of Automotive Studies, Tongji University, Shanghai 210804, China

Received:2021-08-27 Revised:2021-11-03 Accepted:2021-11-10 Online:2021-12-03 Published:2021-12-28
Contact: Zhiwei Guo, Yong Sun, Hong Chen E-mail:2014guozhiwei@tongji.edu.cn;yongsun@tongji.edu.cn;hongchen@tongji.edu.cn
Supported by:
This research was supported by the National Key Research and Development Program of China (Grant No. 2016YFA0301101), the National Natural Science Foundation of China (Grant Nos. 91850206, 61621001, 2004284, 11674247, and 11974261), Shanghai Science and Technology Committee, China (Grant Nos. 18JC1410900 and 18ZR1442900), the China Postdoctoral Science Foundation (Grant Nos. 2019TQ0232 and 2019M661605), the Shanghai Super Postdoctoral Incentive Program, and Fundamental Research Funds for the Central Universities, China.

摘要/Abstract

摘要： As one of the most attractive non-radiative power transfer mechanisms without cables, efficient magnetic resonance wireless power transfer (WPT) in the near field has been extensively developed in recent years, and promoted a variety of practical applications, such as mobile phones, medical implant devices and electric vehicles. However, the physical mechanism behind some key limitations of the resonance WPT, such as frequency splitting and size-dependent efficiency, is not very clear under the widely used circuit model. Here, we review the recently developed efficient and stable resonance WPT based on non-Hermitian physics, which starts from a completely different avenue (utilizing loss and gain) to introduce novel functionalities to the resonance WPT. From the perspective of non-Hermitian photonics, the coherent and incoherent effects compete and coexist in the WPT system, and the weak stable of energy transfer mainly comes from the broken phase associated with the phase transition of parity-time symmetry. Based on this basic physical framework, some optimization schemes are proposed, including using nonlinear effect, using bound states in the continuum, or resorting to the system with high-order parity-time symmetry. Moreover, the combination of non-Hermitian physics and topological photonics in multi-coil system also provides a versatile platform for long-range robust WPT with topological protection. Therefore, the non-Hermitian physics can not only exactly predict the main results of current WPT systems, but also provide new ways to solve the difficulties of previous designs.

关键词: wireless power transfer, non-Hermitian physics, topological edge states

Abstract: As one of the most attractive non-radiative power transfer mechanisms without cables, efficient magnetic resonance wireless power transfer (WPT) in the near field has been extensively developed in recent years, and promoted a variety of practical applications, such as mobile phones, medical implant devices and electric vehicles. However, the physical mechanism behind some key limitations of the resonance WPT, such as frequency splitting and size-dependent efficiency, is not very clear under the widely used circuit model. Here, we review the recently developed efficient and stable resonance WPT based on non-Hermitian physics, which starts from a completely different avenue (utilizing loss and gain) to introduce novel functionalities to the resonance WPT. From the perspective of non-Hermitian photonics, the coherent and incoherent effects compete and coexist in the WPT system, and the weak stable of energy transfer mainly comes from the broken phase associated with the phase transition of parity-time symmetry. Based on this basic physical framework, some optimization schemes are proposed, including using nonlinear effect, using bound states in the continuum, or resorting to the system with high-order parity-time symmetry. Moreover, the combination of non-Hermitian physics and topological photonics in multi-coil system also provides a versatile platform for long-range robust WPT with topological protection. Therefore, the non-Hermitian physics can not only exactly predict the main results of current WPT systems, but also provide new ways to solve the difficulties of previous designs.

Key words: wireless power transfer, non-Hermitian physics, topological edge states

中图分类号: (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

03.75.Lm

88.80.ht (Wireless power transmission) 11.30.Er (Charge conjugation, parity, time reversal, and other discrete symmetries)

Chao Zeng(曾超), Zhiwei Guo(郭志伟), Kejia Zhu(祝可嘉), Caifu Fan(范才富), Guo Li(李果), Jun Jiang(江俊), Yunhui Li(李云辉), Haitao Jiang(江海涛), Yaping Yang(羊亚平), Yong Sun(孙勇), and Hong Chen(陈鸿). Efficient and stable wireless power transfer based on the non-Hermitian physics[J]. 中国物理B, 2022, 31(1): 10307-010307.

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Efficient and stable wireless power transfer based on the non-Hermitian physics

Efficient and stable wireless power transfer based on the non-Hermitian physics

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