Abstract
A wireless power transfer (WPT) system in domino structure is a high-order system with a number of state variables. Thus, the controller design for the power electronic converters has been very challenging. With the aid of phasor transformation, a simple representation of the system could be derived. In this article, the procedure of creating a dynamic model for a WPT system in domino structure is introduced. The model allows the estimation of receiver-side operating conditions from the transmitter. Using the phasor transformation technique, the varying phasors of the resonant voltages and currents in the WPT system are taken as state variables, rather than their rapidly changing real-time values. Compared to traditional analytical methods, the lower computational cost is significantly benefited from the system order reduction. The dynamic model is validated by experimental measurement results. The results show good accuracy of input and output voltage and current prediction. The dynamic model provides a deep insight into the system behavior. The dynamic model could play an important role in the future development of control algorithms to further advance the performance of the WPT system.
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