Open AccessMutual inductance calculation for coils with misalignment in wireless power transfer
Author(s) -
Zhang Xian,
Meng Hao,
Wei Bin,
Wang Songcen,
Yang Qingxin
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8670
Subject(s) - inductance , wireless power transfer , electromagnetic coil , coupling coefficient of resonators , coupling (piping) , inductive coupling , power (physics) , maximum power transfer theorem , physics , equivalent series inductance , wireless , power transmission , resonant inductive coupling , topology (electrical circuits) , electrical engineering , acoustics , computer science , energy transfer , telecommunications , engineering , optics , mechanical engineering , voltage , resonator , quantum mechanics , molecular physics
In wireless power transfer (WPT) systems, the energy transmission channel is established by the coupling relationship between transmitting coil and receiving coil, and the coupling strength is usually measured by coupling coefficient. Therefore, it is necessary to calculate the mutual inductance between transmitting coil and receiving coil when describing their coupling strength. Here, filamentary circular coils and cylindrical helix coils are taken as the object of study, and the formulas for mutual inductance of two coils with misalignment are derived based on Neumann's formula. In addition, the influence of multiple factors, such as axial distance, lateral distance and angle, on mutual inductance is analysed, and the calculated results are verified by experiments. The research results of this paper can be used to estimate the mutual inductance between the couplers in WPT systems, especially when there is misalignment.