Degree
Doctor of Philosophy (PhD)
Department
Electrical and Computer Engineering
Document Type
Dissertation
Abstract
The impact of changing inner diameter of wireless power transfer (WPT) coils on coupling coefficient is studied. It is demonstrated that at a certain outer and inner coil diameter, turn space variation has minor effect on the coupling coefficient. Next, two compensation networks, namely primary LCC and secondary LCC, which offer load-independent voltage transfer ratio and zero voltage switching for WPT, are presented. For both compensation networks, the condition for having zero voltage switching operation are derived. In addition, load-independent voltage transfer ratio (VTR) frequencies are obtained and VTR at each frequency is derived. Then, required equations for calculation of WPT system efficiency based on its equivalent circuit are presented. Eventually, by defining a time-weighted transfer average efficiency (TWTAE), and based on measured values of resistance and inductance of a WPT prototype and experimental charging curve of a Li-ion battery, a design procedure for both compensation networks is proposed. The proposed design leads to high TWTAE as well as low material usage. Simulation and experimental results verify the superiority of proposed coil and compensation design compared to conventional one.
Date
6-3-2019
Recommended Citation
Bozorgi, Amir Masoud, "Cost Effective, Highly Efficient Wireless Power Transfer Systems for EV Battery Charging" (2019). LSU Doctoral Dissertations. 4958.
https://repository.lsu.edu/gradschool_dissertations/4958
Committee Chair
Farasat, Mehdi
DOI
10.31390/gradschool_dissertations.4958