No abstract

Charging mobile electronic devices is a hot topic in the field of wireless power transfer. The change of mutual inductance during the movement of the electronic device will cause the output voltage to fluctuate and the power transfer efficiency to drop. In order to solve these problems, this paper proposes a CLC compensation network that is embedded between the power supply and each transmitter coil. Optimizing the parameters of the CLC compensation networks can ensure that the position-varying load obtains stable voltage while ensuring high power transfer efficiency. Specific theoretical analysis of output voltage control and power transmission efficiency optimization is detailed in the article. Finally, a typical experimental platform is established and the result of the experiment can verify the theory.

An innovative extendible wireless power transfer system with load independent output voltage is developed in this paper. This system eliminates the interference caused by the cross coupling between nonadjacent coils and unrelated circuit networks among the receiving coils. The wireless power transfer system consists of a full-bridge converter power supply, transmitting resonator, relay resonators, and multiple receiving resonators. The theory of load independent output voltage is demonstrated in detail in this paper. The structure and features of the system has also been carefully illustrated. The simulation and experimental results show that the multiple receiving resonators do not affect each other when obtaining power and that the system can obtain load-independent output voltage. Experimental results and simulation analysis are highly consistent and the integrity of the theory is verified.