Finite Element Analysis Based Optimal Design of Push-Pull Transformer for Ultrasonic Motor

摘要

This paper presents an optimal design methodology of a push-pull transformer for the ultrasonic motor (USM) based on the finite-element analysis (FEA). The leakage inductance of a specific winding structure is designed for impedance matching of an ultrasonic motor driving system. The simulation results demonstrate that the air gap between the windings and the number of turns of windings influence the leakage inductance effectively. In addition, using the optimal turns ratio and air gap between windings, a push-pull transformer prototype is manufactured and tested. The experimental results verify the accuracy of the simulation method.