Design and Magnetic Field Simulation of Giant Magnetostrictive Bone Conduction Pronunciation Vibrator

Abstract

Giant magnetostrictive material (GMM) has the characteristics of big magneto-mechanical coupling coefficient, enormous strain and broad frequency response, which is widely used in audio and ultrasonic technology, ultra precision machining, testing technology, fluid control, vibration control and all kinds of sensors in recent years. This paper introduces some of the good qualities of GMM, compared with electromagnetic and piezoelectric materials, which are used extensively for bone conduction hearing device at present; a bow type giant magnetostrictive bone conduction pronunciation vibrator with simple structure and reliable performance is designed; the paper focuses on establishing the vibrator model and the simulation of ANSYS electromagnetics model; the radial magnetic field distribution is also analyzed. All the work provides reference for structure optimization and the selection of coupling materials for the vibrator.