Open AccessMaximum efficiency point tracking control method for series–series compensated wireless power transfer system
Author(s) -
Zhang Wang,
Wu Xiaojie,
Xia Chenyang,
Liu Xu
Publication year - 2019
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5610
Subject(s) - coupling coefficient of resonators , wireless power transfer , series (stratigraphy) , control theory (sociology) , maximum power transfer theorem , coupling (piping) , equivalent series resistance , point (geometry) , electrical impedance , transfer efficiency , maximum power principle , power (physics) , tracking (education) , materials science , electronic engineering , mathematics , computer science , engineering , electrical engineering , optoelectronics , control (management) , physics , voltage , thermodynamics , pedagogy , artificial intelligence , biochemical engineering , biology , psychology , paleontology , geometry , resonator , metallurgy
The efficiency of wireless power transfer system is significantly affected by variations in the system's load resistance and the coils’ coupling coefficient. For obtaining the maximum possible efficiency in different load resistances and coupling coefficients, a new maximum efficiency point tracking (MEPT) control method is proposed in this study. The proposed method realises the MEPT by converting the load impedance in real time and making the primary and the secondary resonant currents be a specific ratio. This specific ratio is determined by the equivalent series resistances of the primary and secondary circuits, which is independent of the coupling coefficient. The experimental results show that the maximum efficiency point can be tracked and the system efficiency can be improved by the proposed method.