Magnetic circuit optimization design and thermal analysis of the giant magnetostrictive transducer

Qiang Liu; Xiping He

doi:10.1016/j.ultras.2023.107031

Magnetic circuit optimization design and thermal analysis of the giant magnetostrictive transducer

Ultrasonics. 2023 Aug:133:107031. doi: 10.1016/j.ultras.2023.107031. Epub 2023 May 9.

Authors

Qiang Liu¹, Xiping He²

Affiliations

¹ School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China.
² School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China. Electronic address: hexiping@snnu.edu.cn.

PMID: 37182316
DOI: 10.1016/j.ultras.2023.107031

Abstract

A giant magnetostrictive transducer was studied. The dynamic simulation analysis of the transducer was carried out, the influence of the magnetic block and the magnetic cylinder on the vibration performance of the transducer was studied, and the temperature rise of the transducer during the operation was simulated and calculated. The impedance and output amplitude of the developed transducer were tested experimentally. The results show that the axial magnetic field intensity of the Terfenol-D rod increased and then decreased, and the output amplitude increased and then decreased slightly with the increase of the thickness of the magnetic cylinder. As the thickness of the magnetic block increased, the axial magnetic field intensity of the rod increased, and the output amplitude of the transducer also increased. Compared with the transducer without magnetic cylinder, the transducer with magnetic cylinder has larger electromechanical conversion coefficient, and output amplitude, but the temperature was higher after working for the same time.

Keywords: Finite element calculation; Giant magnetostrictive material; Magnetic circuit optimization; Thermal analysis; Ultrasonic transducer.