An Electric-Field Coupled Wireless Power Transfer System with Anti-Misalignment Characteristics Based on Hybrid Compensation

Electric-field coupled wireless power transfer is one of the common ways to realize wireless power transfer, which has the advantages of good plasticity and small eddy current loss. In this paper, based on the electric field coupled wireless power transfer technology, from the anti-misalignment characteristics of the system, by applying the input series output series hybrid compensation topology to the wireless power transfer system with two sets of coupling mechanisms, the output power of the system is basically kept unchanged when the mutual capacitance value of the coupling mechanism is changed in a certain range, as well as the load-independent constant-current output characteristics are maintained. In the hybrid topology model of the system, topology 1 and topology 2 are bilateral LC and bilateral LCLC, respectively, and are connected in series-reverse mode. The simulation results show that the system can have good anti-misalignment performance and load independent constant current output characteristics when the mutual capacitance value of the system is changed in a certain range.