The Design and Optimization of a Wireless Power Transfer System Allowing Random Access for Multiple Loads

Linlin Tan, Ming Zhang, Songcen Wang, Shulei Pan, Zhenxing Zhang, Jiacheng Li and Xueliang Huang
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Linlin Tan: School of Electrical Engineering, Southeast University, No. 2 Sipailou, Nanjing 210096, China
Ming Zhang: School of Electrical Engineering, Southeast University, No. 2 Sipailou, Nanjing 210096, China
Songcen Wang: State Grid China Electric Power Research Institute, Beijing 100192, China
Shulei Pan: State Grid Yancheng Power Supply Company, No. 189, Jiefang South Road, Yancheng 224000, China
Zhenxing Zhang: School of Electrical Engineering, Southeast University, No. 2 Sipailou, Nanjing 210096, China
Jiacheng Li: School of Electrical Engineering, Southeast University, No. 2 Sipailou, Nanjing 210096, China
Xueliang Huang: School of Electrical Engineering, Southeast University, No. 2 Sipailou, Nanjing 210096, China

Energies, 2019, vol. 12, issue 6, 1-19

Abstract: As is common in multi-load wireless power transfer (WPT) systems based on series–series compensation topology, the power received by loads and the efficiency of the process are highly sensitive to changes in the number of loads. To guarantee that the power supplied to a load remains stable when other loads access or leave the system, we propose an improved multi-load system for WPT. The new system uses an LCC/S topology (based on inductor–capacitor–inductor or LCL topology) to keep the power received by the loads stable. By comparing two scenarios (ideal and real models based on LCC/S topology), we aim to eliminate cross-coupling between receiving coils by connecting compensating capacitors in series on the receiving side. In this way, the stability of the power received by loads is further improved. Moreover, a method of optimizing control over the efficiency is proposed based on the effect on the overall efficiency of impedance and number of loads. This allows us to optimize the overall efficiency of the system. Finally, a system to verify our theoretical analysis is established and used to show the validity and effectiveness of the proposed system.

Keywords: wireless power transfer (WPT); multiple loads; LCC/S topology; efficiency optimization; power stabilization (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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