Title :
Comparative study on power conversion methods for wireless battery charging platform
Author :
Choi, W.P. ; Ho, W.C. ; Liu, X. ; Hui, S.Y.R.
Author_Institution :
Convenientpower HK Ltd., Hong Kong, China
Abstract :
In this paper, four different power conversion methods (voltage control, duty-cycle control, frequency control and phase-shift control) are compared for wireless power transfer applications by considering the energy transfer efficiency, electromagnetic interference, stability, and implementation complexity. The phase-shift control is found to be the optimal scheme with good efficiency and low electromagnetic interference. Its constant frequency feature is also within the framework of the new international wireless charging standard called `Qi´. A high system efficiency of 72% for 5W wireless charging applications has been achieved practically.
Keywords :
battery chargers; electromagnetic interference; frequency control; power conversion; voltage control; duty cycle control; electromagnetic interference; energy transfer; frequency control; optimal scheme; phase shift control; power 5 W; power conversion; stability; voltage control; wireless battery charging platform; Frequency control; Inverters; Logic gates; Resonant frequency; Voltage control; Windings; Wireless communication; Battery charger; Contactless charging; Wireless power transmission; electromagnetic interference;
Conference_Titel :
Power Electronics and Motion Control Conference (EPE/PEMC), 2010 14th International
Conference_Location :
Ohrid
Print_ISBN :
978-1-4244-7856-9
DOI :
10.1109/EPEPEMC.2010.5606675