Establishment and Application of a Semianalytical Model of Ultrasonic Power Transfer

Ultrasonic power transfer (UPT) has become an important way of energy transmission in industrial and medical fields because of its advantages of high transmission power, zero-electromagnetic shielding, and harmlessness. In this article, a semianalytical UPT modeling method is proposed based on the finite element model of metal wall and the analytical model of piezoelectric material through a two-port network transfer matrix. The proposed model can achieve the accurate simulation of complex UPT systems and efficiently optimize parameters. The calculation results of the model are compared with the measured results in the metal wall UPT and the accuracy of the model method is proved. In addition, the UPT with asymmetric excitation and receiving ends was explored with this model for the first time. The effects of piezoelectric transducer radius, piezoelectric transducer thickness, and metal wall thickness on the system performance of UPT were comprehensively analyzed and the influences of various parameters on the system performance of UPTs were investigated.