Abstract
Inductive power transmission (IPT) systems are composed of at least one transmitter coil and one receiver coil. The efficiency of these systems is determined by the power losses in both coils due to two phenomena: conduction losses and proximity losses. Proximity losses depend on the current densities induced in the winding by the magnetic fields of the system. Some analytical models of efficiency in IPT systems have been proposed in the past, but these methods only consider the proximity losses for isolated coils. However, the mutual coupling between the magnetic fields of both coils must be taken into account to achieve accurate power losses estimation. In this paper, the effect of the coupling power losses in multiple coil systems is fully described based in part on the results of previous works. Finally, model based simulation results are compared to experimental measurements to verify the proposed analysis.
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