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Rectangular coils optimization for wireless power transmission
Author(s) -
Duan Zhu,
Guo YongXin,
Kwong DimLee
Publication year - 2012
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2011rs004970
Subject(s) - matlab , power transmission , maximum power transfer theorem , power (physics) , transmission (telecommunications) , wireless power transfer , electrical efficiency , computer science , optimal design , electronic engineering , acoustics , wireless , electrical engineering , physics , engineering , telecommunications , quantum mechanics , machine learning , operating system
Wirelessly coupled coils are crucial for efficient power transmission in various applications. Previous design methods are only eligible for improving the efficiency of circular or square coils. This paper presents a method of characterizing and optimizing rectangular coils used in inductively coupled systems. After setting up a lumped component model for inductive coils, the efficiency can be expressed in terms of geometrical parameters of the coils. Subsequently, the power efficiency can be plotted versus these parameters in Matlab, thus getting the desired coils for optimum power transfer. With this design procedure from mathematical optimization, we eventually designed two rectangular coils spaced 10 mm apart, which achieves a power transmission efficiency of 46.4% at a frequency of 3 MHz. The design methodology is verified by simulation and measurement.