Abstract
Magnetically coupled resonance (MCR) wireless power transfer (WPT) system is a promising technology in electric energy transmission. But, if its system parameters are designed unreasonably, output power and transmission efficiency will be low. Therefore, optimized parameters design of MCR WPT has important research value. In the MCR WPT system with designated coil structure, the main parameters affecting output power and transmission efficiency are the distance between the coils, the resonance frequency and the resistance of the load. Based on the established mathematical model and the differential evolution algorithm, the change of output power and transmission efficiency with parameters can be simulated. From the simulation results, it can be seen that output power and transmission efficiency of the two-coil MCR WPT system and four-coil one with designated coil structure are improved. The simulation results confirm the validity of the optimization method for MCR WPT system with designated coil structure.
Highlights
Wireless power transfer (WPT) is a promising technology to be applied in many modern applications ranging from electronic equipment to electric vehicles.[1,2] Two popular technologies for wireless power transfer (WPT) are magnetically coupled inductive (MCI) WPT system and magnetically coupled resonance (MCR) one
MCR WPT system possesses the characteristics of high efficiency, non-radiant energy and good penetrability, which can light up a 60W bulb with a transmission efficiency of about 40% at distance about 2m by scientists in Massachusetts Institute of Technology.[4]
In MCR WPT system, the two-coil system is suitable for short-range applications, while the four-coil system is suitable for mid-range applications.[3]
Summary
Wireless power transfer (WPT) is a promising technology to be applied in many modern applications ranging from electronic equipment to electric vehicles.[1,2] Two popular technologies for WPT are magnetically coupled inductive (MCI) WPT system and magnetically coupled resonance (MCR) one. In MCR WPT system, the two-coil system is suitable for short-range applications, while the four-coil system is suitable for mid-range applications.[3] In this paper, based on the established mathematical model and the differential evolution algorithm, an optimization method for output power and transmission efficiency of the two-coil MCR WPT system and four-coil one is proposed. The optimal parameters such as the distance between the coils, the resonance frequency and the resistance of the load are obtained by means of differential evolution algorithm. By comparing and analyzing simulation results, output power and transmission efficiency of MCR WPT system with designated coil structure are improved
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