Research On Efficiently Wireless Power Transmission For Multiple Desktop Electrical Devices

As the development of science and technology, it becomes general that theapplications of the portable desktop electronic devices. However, the portable desktopelectronic devices with the wired power have the disadvantages of low safety, lowresponsibility, and poor portability. Hence, wireless power transmission is highlydesirable.Inductively coupled power transmission (ICPT) system is a technology ofwireless power transmission applying the electromagnetic induction principle. Theresearch on the single-phase and three-phase ICPT system mainly focuses on theinverter circuit and power compensation circuit. Take the single-phase ICPT as anexample. Its resonance parameters are described in detail.Due to the uncertainty about the position and multiple devices parallel powersupply, a suitable power mode is selected and a load identification approach withsub-regions is designed. Based on the analysis of coils distribution, the optimumconfigurations of primary coil and second coil are designed, respectively. Radiofrequency identification (RFID) is used to determine the load region, where theprimary coils are conducted. Based on the detection of current through the primarycoil, a pair of coils closest to the load is obtained. Furthermore, the approaches whichremove dead spot exsinting in the three-phase ICPT system are presents. The designof a wireless power transmission for desktop electronic devices is implemented,which comprises main circuit, configures selection, load identification circuit andsecondary coil electricity-transformation circuit.The magnetic field intensity of the spiral coils on the wireless power desktop isobtained by the finite element analysis (FEA), which verifies the effectiveness of theinproved type spiral coil. Based on the theoretical design configures, simulationmodels and experimental platform for wireless power transmission are set up. Theexperiment results confirm that the correctness and feasibility of the proposed designplan, and the effectiveness of suppression of dead spot.