Effect analysis between resonator parameters and transmission performance of magnetic coupling resonant wireless power transmission system

When designing a magnetic coupling resonant wireless power transmission system, we need to seek optimal transmission performance under different situations. By modeling analysis for the magnetic coupling resonant wireless power transmission system, especially the four-coil-system with dual relays, we use normalized parameter analytical theory to explore the way of realizing optimal transmission efficiency and output power, as well as the internal relations between these two targets. By theoretical simulations and experiments, the optimal transmission efficiency and the optimal output power are not matching when the system operating frequency is determined. Ultimately, applying the theory results to the design of actual system, it is found that there are determined turns or radius of receiving coils which can provide maximum transmission efficiency or output power when other parameters of the system is unchanged. © 2015, The editorial office of Transaction of China Electrotechnical Society. All right reserved.