Application of Universal Contactless Charger for Cellular Phone

This paper discusses the designation and implementation of a universal contactless charger for a Cellular phone. By using the electromagnetic coupling induction with the related applications, the charger can be done. Through the coil coupling induction, contactless power transmission system can supply the power to the secondary side with higher safet rate and lower repair probability. However, the application discuused in this paper is the PCB (Printed Circuit Board) and a spiral-type induction coil used as a coupling induction device for the contactless charging system. With the design scheme in this paper, the size of regular counting induction devices can be greatly reduced. By changing the geometric shape and location of coupling coil, the relationship and changing conditions of respective parameters and coupling coefficients can be obtained and analyzed to serve as references for future designs. Therefore, in conjunction with theoretic and actual design guidelines, sequential studies will be conducted. Finally, contactless Cellular phone charger with rated 4.2V, 800 mA is completed to validate its function.