Open AccessDesign and Optimization of Magnetic Coupled Resonant Wireless Power Transfer System at Weak - coupling Region
Author(s) -
Dawei Song,
Fengdong Shi,
Wei Liu
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1449/1/012006
Subject(s) - inductance , wireless power transfer , inductive coupling , electromagnetic coil , coupling (piping) , resonant inductive coupling , transmission (telecommunications) , power transmission , maximum power transfer theorem , wireless , power (physics) , electronic engineering , transmission system , coupling coefficient of resonators , data transmission , physics , electrical engineering , computer science , engineering , telecommunications , mechanical engineering , energy transfer , quantum mechanics , voltage , resonator , molecular physics
Frequency splitting is one of the hot topics in the research of magnetic coupling wireless power transfer technology. Its purpose is to improve the transmission efficiency by eliminating the frequency splitting at the over-coupled region of the system. Frequency splitting does not occur at the weak coupling region. The transmission characteristics of the system in weak-coupled region are also of research significance. The mathematical model of the system’s transmission characteristic was established by equivalent circuit theory. Several key factors that affect the transmission characteristics of the system, self-inductance of the coil, mutual inductance between the coils, load resistance and so on, were obtained. A magnetically coupled resonant wireless power transfer system is designed and A method of coil design is proposed. The transmission efficiency of the system at the weak-coupling region was improved by optimized the design of the coil. Simulation and experimental results had good consistency. The results show that the transmission performance of the system at the weak-coupling area was improved.