Research on the transmission characteristics of various coupling structures based on Various Wireless Power Transfer Technology

Wireless power transfer (WPT) technology is widely used in many fields, such as mobile phone charging, implant medicine device, electric vehicle, AGV/AUV, etc. The normal coupling structure of WPT is 1vs1 symmetry model. It has many advantages for application. Many researchers also paid attention to other coupling structures, such as 1vs2, 2vs1, MIMO, etc. It's hard to decide which is the best coupling structure because of the various applications and designing parameters. Firstly, this paper analyzed four typical coupling structures, including 1vs1, 1vsM, 2vs1, Mvs1 and MvsM. Secondly, output power and transfer efficiency of various coupling structures are calculated by the mutual equivalent model. At last, according to practical coupling structure, the output power and efficiency are compared in the same model. It will give a design method for WPT systems when need to design the suitable transfer coupling structure.