Open AccessDynamic analysis model of a class E 2 converter for low power wireless charging links
Author(s) -
Bati Akram,
Luk Patrick C.K.,
Aldhaher Samer,
See Chan H.,
AbdAlhameed Raed A.,
Excell Peter S.
Publication year - 2019
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
ISSN - 1751-8598
DOI - 10.1049/iet-cds.2018.5091
Subject(s) - control theory (sociology) , wireless power transfer , rectifier (neural networks) , operating point , inverter , electromagnetic coil , voltage , capacitance , electronic engineering , topology (electrical circuits) , computer science , engineering , physics , electrical engineering , stochastic neural network , control (management) , electrode , quantum mechanics , artificial intelligence , machine learning , recurrent neural network , artificial neural network
A dynamic response analysis model of a Class E 2 converter for wireless power transfer applications is presented. The converter operates at 200 kHz and consists of an induction link with its primary coil driven by a class E inverter and the secondary coil with a voltage‐driven class E synchronous rectifier. A seventh‐order linear time invariant state‐space model is used to obtain the eigenvalues of the system for the four modes resulting from the operation of the converter switches. A participation factor for the four modes is used to find the actual operating point dominant poles for the system response. A dynamic analysis is carried out to investigate the effect of changing the separation distance between the two coils, based on converter performance and the changes required of some circuit parameters to achieve optimum efficiency and stability. The results show good performance in terms of efficiency (90–98%) and maintenance of constant output voltage with dynamic change of capacitance in the inverter. An experiment with coils of the dimension of 53 × 43 × 6 mm 3 operating at a resonance frequency of 200 kHz, was created to verify the proposed mathematical model and both were found to be in excellent agreement.