New parameter tuning method for LCC/LCC compensated IPT system with constant voltage output based on LC resonance principles

Compensation topologies with constant current (CC) or constant voltage (CV) play essential roles in inductive power transfer (IPT) systems. This article describes basic LC resonance principles, which can analyse the output characteristics of all the compensation topologies with CC or CV outputs. By combining LC principles, a new parameter tuning method for LCC/LCC topology with CV output is proposed, followed by efficiency analysis and sensitivity analysis as per various configurations. Moreover, comparing with conventional topologies, it indicates that the LCC/LCC topology has three advantages: (i) The output voltage is load-independent, and it can easily achieve zero phase angle (ZPA) or zero voltage switching (ZVS); (ii) This topology can free the design from the restrictions enforced by the loosely coupled transformer parameters; (iii) The topology is equipped with high-order harmonic suppression capability. Finally, a 1300-W laboratory-scale prototype with a 15 cm air gap was built to verify the theoretical analysis. The experimental results demonstrate the feasibility and superiority of the proposed LCC/LCC IPT system with new parameter tuning method.