Modeling and verification of wireless power transmission system based on energy-phase angle
In order to solve the problem that in the wireless power transmission system,the frequency of current and voltage changes quickly,and cannot directly reflect the effective value of the voltage on the load,this paper adopts the energy-phase angle modeling method for the wireless power transmission system of full-bridge inverter,and avoids the higher order of the system compared with the d-q decomposition method.Firstly,the equivalent circuit model of the wireless power transmission system driven by the full-bridge inverter is analyzed,and the energy and phase angle are used as variables to build a small signal model for the equivalent circuit.Then,the small signal model is linearized near the operating point to obtain the linear model of the system and its transfer function.Finally,the prototype of the full-bridge inverter is developed and applied to the wireless power transmission system.The experimental results and the amplitude-phase characteristic curve obtained by the small signal modeling are basically the same in the middle and low frequency bands,and the agreement reached 90％at the frequencies of 1 000 rad/s and below,which verifies the accuracies of the modeling method and model.
wireless power transmissionenergy-phase angle modeling methodphase shift control
NETL
NSTL
万方数据
维普
