Abstract:

In order to solve the problem that the electromagnetic induction setting mode is just adapted to short distance transmission with low efficiency, a new wireless power transmission system using three coils via adaptive frequency tracking to achieve synchronous, fast and high efficient power and information transmission based on the magnetic resonance theory is proposed. Using the mutual inductance model of magnetic resonance coupling, the three-coil topology circuit stapling system is analyzed, and the relationship between the transmission power and efficiency of the entire system, the coil resonant frequency and the coupling coefficient is discussed. Based on the optimal control theory of phase-locked loop, a resonant frequency tracking strategy is proposed, and the receiving power and charging time of load capacitance are optimized. The stati-experimental results show that the proposed transmission system meets the requirements of power transmission with a coupling distance of 20 mm, at a relative velocity of 2.5 m/s and in a ferromagnetic environment, and this method provides theoretical and technological support for the design of the information link of weapon systems in next generation.