Abstract
Due to the limitation of rated current and cooling conditions on the traditional single inverter inductive power transfer (IPT) system, the output power of the primary side cannot meet the requirement of the high-capacity battery and supercharge technology. As an effective solution, the multi-parallel inverters IPT system can not only improve the rated output power of the primary side power source but also improve the stability due to its fault-tolerance performance. Aiming at the low efficiency of multi-parallel IPT systems under light load, this paper proposes a dynamic module adjustment scheme for multi-parallel IPT systems to improve the overall efficiency in whole charging process. When the system operates under different power conditions, the efficiency of the system can be improved by adjusting the number of parallel inverters. A 3.3 kW experimental prototype based on three parallel inverters IPT system is established to verify the feasibility of the proposed methods. Compared with the single inverter IPT system, the multi-parallel inverters IPT system with dynamic module adjustment scheme has higher efficiency in wide power process.
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