An Interoperable Wireless Charging System for Orthogonal Bipolar Coils Based on Two Self‐Decoupled Transmitting Coils

ABSTRACT With the extensive research and application of bipolar coils, resolving the compatibility issues of bipolar coils along different directions while maintaining stable output under spatial misalignment has become an urgent requirement. This article proposes an interoperable wireless power transfer (WPT) system based on a symmetrical solenoid transmitter. By optimizing the design of two sets of solenoid coils, the transmitter achieves inherent self‐decoupling, thereby eliminating the need for auxiliary decoupling coils. Furthermore, by dynamically configuring the magnetic polarities of the transmitting windings, full interoperability with bipolar coils along different directions is realized. Simultaneously, by switching the inverter operating modes, the system is compatible with both 400‐ and 800‐V battery platforms. To validate the proposed WPT system, a downscaled experimental prototype was constructed. Experimental results demonstrate that under a ± 90 mm of X‐axis misalignment, the output voltage fluctuations for the 200‐ and 400‐V conditions are merely 3.96% and 4.06%, respectively. Moreover, the system's transmission efficiency remains above 80% throughout the entire misalignment range.