Power optimization of a magnetoelectric wireless power transfer system with volume constraint

We present a general framework for maximizing the power delivered to a load resistance of a magnetoelectric wireless power transfer system, especially under a volume constraint condition. We derive an analytical solution to a power optimization problem, both for a given transducer geometry and when the geometric dimensions are subject to change. We investigate the relationships between the output power and the chosen operating fre-quency in various circumstances when the mechanical damping coefficient or the mechanical quality factor is kept constant independent of the change in the receiver geometry. We discuss the essential roles of the magneto-elastic transduction factor and a resonator figure of merit and show how to obtain the optional thickness ratio between the two constitutive materials, magnetostrictive and piezoelectric. Examples with particular sets of system parameters are given to demonstrate the general theoretical analysis.

Automated summary

This paper presents a general framework for maximizing power transmission to a load resistance in a magnetoelectric wireless power transfer system, considering volume constraints. The authors derive an analytical solution to the power optimization problem under different conditions and investigate the relationships between output power and operating frequency. The roles of magneto-elastic transduction factor and resonator figure of merit are discussed, and examples with specific system parameters are provided to validate the theoretical analysis.