Optimized Design of Passive Array Coils for High-Efficiency and Anti-Misalignment WPT System

Mid-range wireless power transfer (WPT) system for consumer electronics has been hamstrung by modest energy efficiencies and low misalignment tolerance. As the increase in transfer distance, the increasing leakage magnetic flux between transmitting coil and receiving will deteriorate the system perf...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power electronics 2024-05, Vol.39 (5), p.6504-6514
Main Authors: Rong, Cancan, Chen, Mengmeng, Duan, Xiaoyu, Liu, Yunhai, Wu, Junhao, Zeng, Yingqin, He, Xiangrui, Liao, Zhijuan, Xia, Chenyang
Format: Article
Language:English
Subjects:
Arrays
Coils
Coils (windings)
Couplings
Design optimization
Design parameters
Efficiency
Genetic algorithms
Magnetic fields
Magnetic flux
Metamaterials
Misalignment
Misalignment tolerance
modified multiobjective genetic algorithm (GA)
Parameter modification
passive array coils (PACs)
Picture archiving and communication systems
Power factor
power transfer efficiency (PTE)
Repeaters
Topology
wireless power transfer (WPT)
Wireless power transmission
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Mid-range wireless power transfer (WPT) system for consumer electronics has been hamstrung by modest energy efficiencies and low misalignment tolerance. As the increase in transfer distance, the increasing leakage magnetic flux between transmitting coil and receiving will deteriorate the system performance. In this article, a novel optimization-based design method of passive array coils (PACs) is presented in order to maximize the power transfer efficiency (PTE) and improve the misalignment tolerance in WPT system. A modified multiobjective genetic algorithm is implemented to optimize parameters of PACs in consideration of PTE, displacement flexibility and volume of PACs. Moreover, a parameter design scheme for compensation network, namely Series-Seriess-Series topology for co-planar multiple coils is investigated, which can achieve zero phase angle in primary side and enhance power factor. Finally, the reasonable prototype of the proposed WPT system with PACs is designed, fabricated and tested. The experimental results show that the proposed structure can increase the efficiency by almost 50% over the system without PACs at 400 mm distance and deliver almost 40 W of output power. Moreover, the PTE and output power can still remain stable under large lateral misalignment with PACs.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2024.3365129