A Magnetic-Integrated Hybrid Topology for Capacitive Power Transfer System Achieving Antimisalignment and Inductor Miniaturization

For capacitive power transfer (CPT) systems, antimisalignment capability and receiver miniaturization remain critical challenges in practice, especially for modular CPT systems. This article proposes a magnetic integrated hybrid topology to address output fluctuations under misalignment and load variation conditions, while reducing receiver volume. First, a diagonal-plate four-port capacitive coupler is designed to form two independent capacitive coupling channels. Then, a hybrid compensation topology using magnetically integrated inductors (MIIs) is proposed for these two channels. The two channels with the hybrid topology exhibit complementary gain characteristics, enabling the CPT system to maintain constant output against alignment and load disturbances. Meanwhile, all receiverside inductors are integrated on a pair of toroidal cores for miniaturization. Finally, a 1 kW experimental prototype is constructed, and the results show that the output voltage fluctuates within 10% when the coupler is misaligned within ±80 mm (x-direction), ±60√ 2 mm (x/y bisector), and −5 to 9 mm (z-direction). The output voltage increase is not exceeded 18% as the load varies from 20 to 100 Ω. Additionally, the proposed MIIs reduces the volume of receiver-side inductors by 85.85% compared to the conventional three air-core inductor configuration.