High-Tolerance Inductive Power Transfer System Based on Parallel Dual-Channel Hybrid Topology

To achieve both controllable output and high misalignment tolerance in inductive power transfer (IPT) systems, an IPT system based on parallel dual-channel hybrid topology is proposed. First, a dual-vertical magnetic coupling structure is designed based on the self-decoupling theory of orthogonal windings, effectively solving the cross-coil coupling interference problem. Next, the LCC/S and LCC/LCC topologies are used to form an input-parallel-output-parallel hybrid topology to realize dual-channel parallel constant-current output. To enhance the output current regulation and misalignment tolerance, a dual-topology output collaborative optimization strategy is proposed. The stability factor α and regulation factor β are introduced to control the output gains of the LCC-S and LCC-LCC topologies, respectively. An output current regulation mechanism based on α and β is established, and a velocity-controlled particle swarm optimization (VCPSO) algorithm is adopted to optimize the current fluctuation ratio, solving for the optimal α and minimizing output current fluctuations within a 140mm offset range. Experimental results show that under zero-phase input, 200% load variation, and 50% offset conditions, the system output current is stabilized within the preset range of 5.5A to 6.5A, with a maximum fluctuation rate of less than 7%.