A Tri-SS Hybrid Wireless Power Transfer System Achieving High Power Density and Misalignment Tolerance

The proportion of electric-field power (EFP) in existing hybrid wireless power transfer (HWPT) systems is constrained by dielectric constant limitations, resulting in a narrow EFP transmission channel. This paper addresses this limitation by proposing a novel Tri-SS HWPT system incorporating a multichannel integrated coupler that simultaneously enables EFP and magnetic-field power (MFP) transmission. A synchronized regulation mechanism has been implemented through series-connected power distribution, achieving capacity coordination between transmission channels. The complementary characteristics of different transmission channels are leveraged to achieve synergistic power transfer under varying coupling conditions. Resonance maintenance and performance optimization are ensured via enhanced misalignment tolerance within the specified range. Experimental validation on a 550W platform demonstrates 81.4% power transfer efficiency at 60% misalignment, with improvements in EFP channel width and power density compared with conventional systems. The Tri-SS architecture establishes a robust HWPT framework that effectively enhances both power density and misalignment tolerance, thereby expanding the potential application domains of such HWPT systems.