Abstract
High misalignment-insensitive capacity is of great importance for inductive power transfer (IPT) systems. A hybrid topology based on a parameter optimization design method is presented to obtain constant current output regardless of the coupling and load. DDQ coils are employed to protect against system key parameter changes, and a particle swarm optimization (PSO) method has been presented to achieve a nearly constant current output without using complex control schemes. A hybrid IPT system using DDQ coils has been built. The experimental results verify that the current fluctuation is within 5% when the load varies from 5 Ω to 10 Ω within 50% misalignment of the coupling pads. Moreover, the maximum system DC–DC efficiency is up to 91%.
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