Nonlinear modeling and feedback control of WPT system via magnetic resonant coupling considering continuous dynamic tuning

In a wireless power transfer (WPT) system via magnetic resonant coupling, the detuning will greatly reduce the transmission power and efficiency. In this paper, a nonlinear tuning model and feedback controllers of the system considering the continuous dynamic tuning are developed to eliminate the di...

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Bibliographic Details
Published in2017 Chinese Automation Congress (CAC) pp. 4203 - 4208
Main Authors Cheng Chen, Hong Zhou, Qijun Deng, Xin Luo
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2017
Subjects
Capacitance
feedback control
Inductance
Mathematical model
Nonlinear dynamical systems
nonlinear tuning model
phase difference
Steady-state
Tuning
wireless power transfer
Zero voltage switching
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Summary:In a wireless power transfer (WPT) system via magnetic resonant coupling, the detuning will greatly reduce the transmission power and efficiency. In this paper, a nonlinear tuning model and feedback controllers of the system considering the continuous dynamic tuning are developed to eliminate the disturbance from the detuning. The phase difference between the primary and secondary side is employed to predicate the resonant state. The model is linearized around the operating point by small-signal analysis methodology. Based on the dynamics of the linearized model, a PI controller for each side of the system is designed. It enables the system to simultaneously tuning at the primary and secondary side using a parallel digitally tunable capacitance. The closed-loop nonlinear state-space model is built and the numerical simulations verify the fast dynamic tuning ability of the resonant tank to cope with the detuning disturbance.
DOI:10.1109/CAC.2017.8243517