Open AccessA General Method to Parameter Optimization for Highly Efficient Wireless Power Transfer
Author(s) -
Keita Yamaguchi,
Tatsumi Hirata,
Ichijo Hodaka
Publication year - 2016
Publication title -
international journal of electrical and computer engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.277
H-Index - 22
ISSN - 2088-8708
DOI - 10.11591/ijece.v6i6.pp3217-3221
Subject(s) - wireless power transfer , wireless , electrical impedance , impedance matching , maximum power transfer theorem , power (physics) , computer science , matching (statistics) , electrical engineering , telecommunications , mathematics , physics , engineering , statistics , quantum mechanics
This paper proposes a new and general method to optimize a working frequency and a load resistance in order to realize highly efficient wireless power transfer. It should be noticed that neither resonant frequency nor matched impedance maximizes efficiency of wireless power transfer circuit, in general. This paper establishes a mathematical model of a commonly used wireless power transfer circuit, and derives a mathematical expression of circuit efficiency which involves a working frequency, a load resistance and the other parameters as symbols. This enables us to find the optimal working frequency and load resistance. The result of this paper is compared with results by a method based on resonance and impedance matching, and then clarified by a numerical example.