Efficiency analysis of contactless electrical power transmission systems

In this paper, efficiency analysis and design of contactless electric power transfer systems working based on an inductive method are elaborated. Large leakage inductances of the systems are compensated to achieve resonance conditions for maximum efficiency. Considering the circuit models of a contactless system, the effects of different parameters including the compensating capacitors are analyzed for a specified frequency range and coupling coefficient. An algorithm is proposed to determine the optimal capacitors and resonance frequency. It is verified by experimental results.

► Efficiency analysis for an IPT system is carried out for a practical system design.
► Transfer efficiency of an IPT system is obtained in terms of the system parameters.
► Supplying an IPT by a specific resonance frequency will maximize the efficiency.
► The transfer efficiency of different resonant system structures is analyzed.
► The simulation results are verified by the experimental results.