ABSTRACT Undersea ocean currents tend to cause multidirectional offsets of the coupling mechanism in the wireless charging system of autonomous underwater vehicles (AUVs), leading to reductions in power supply efficiency and power, and even impairing the normal operation of the system; meanwhile, the internal space of AUVs is extremely limited. To address these issues, this paper proposes a dual‐output underwater wireless power transfer (UWPT) system based on a lightweight magnetic‐integrated coupler and its parameter optimization method, which is suitable for AUV applications. First, a novel lightweight magnetic‐integrated arc‐shaped coupler is designed. Then, a dual‐output WPT topology matched with this coupler is developed, and an adaptive modulation strategy based on the parameters of the magnetic coupling structure and compensation structure is established. The first type of modification factor leverages the relatively stable characteristic of mutual inductance offset variation to construct a mapping relationship between the mutual inductance offset ratio and compensation structure parameters, effectively suppressing the equivalent mutual inductance fluctuation caused by coil offset. The second type of modification factor can realize the control of output gain by regulating the equivalent mutual inductance parameters. Finally, an experimental prototype with a rated power of 1 kW is built for actual measurement and verification. The experimental results show that the maximum allowable axial offset range is −50 mm, 50 mm; the angular offset range is −20°, 25°, and the maximum fluctuations of the system output current and output voltage are both maintained within 7%.
Liu et al. (2026) studied this question.