Nonlinear characteristics of equivalent circuit parameters for giant magnetostrictive vibrator.

Yoshikawa, Takashi; Kawamori, Akiyoshi; Kamata, Hiroshi; Wakiwaka, Hiroyuki; Furihata, D.; Yamada, H.

doi:10.3135/jmasj.24.85

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A cylindrical Terfenol-D in k 33 vibration mode is discussed in this paper, as shown in Figure 3 . The coordinate system is established with one end of the rod as the origin of coordinates, and the vibration of the Terfenol-D rod is simplified to simple harmonic motion without considering the time response of the circuit; a conventional PWM equivalent circuit without considering material losses [ 23 ] is described in Figure 4 .…”

Section: Loss Integration Into Pwm Equivalent Circuitmentioning

confidence: 99%

“…ε 1 and ε 2 are the vibration velocity at z = 0 and z = l g , respectively. L 0 is the damped inductance and expressed as [ 23 ]

where

represents the relative permeability under constant stress,

stands for the elastic compliance under constant magnetic field intensity, and

denotes the piezomagnetic constant.…”

Section: Loss Integration Into Pwm Equivalent Circuitmentioning

confidence: 99%

See 1 more Smart Citation

Modeling of High-Power Tonpilz Terfenol-D Transducer Using Complex Material Parameters

Yao

Yang

Zhang

et al. 2022

Sensors

View full text Add to dashboard Cite

The loss effect in smart materials, the active part of a transducer, is of significant importance to acoustic transducer designers, as it directly affects the important characteristics of the transducer, such as the impedance spectra, frequency response, and the amount of heat generated. It is therefore beneficial to be able to incorporate energy losses in the design phase. For high-power low-frequency transducers requiring more smart materials, losses become even more appreciable. In this paper, similar to piezoelectric materials, three losses in Terfenol-D are considered by introducing complex quantities, representing the elastic loss, piezomagnetic loss, and magnetic loss. The frequency-dependent eddy current loss is also considered and incorporated into the complex permeability of giant magnetostrictive materials. These complex material parameters are then successfully applied to improve the popular plane-wave method (PWM) circuit model and finite element method (FEM) model. To verify the accuracy and effectiveness of the proposed methods, a high-power Tonpilz Terfenol-D transducer with a resonance frequency of around 1 kHz and a maximum transmitting current response (TCR) of 187 dB/1A/μPa is manufactured and tested. The good agreement between the simulation and experimental results validates the improved PWM circuit model and FEA model, which may shed light on the more predictable design of high-power giant magnetostrictive transducers in the future.

show abstract

Section: Loss Integration Into Pwm Equivalent Circuitmentioning

confidence: 99%

“…ε 1 and ε 2 are the vibration velocity at z = 0 and z = l g , respectively. L 0 is the damped inductance and expressed as [ 23 ]

where

represents the relative permeability under constant stress,

stands for the elastic compliance under constant magnetic field intensity, and

denotes the piezomagnetic constant.…”

Section: Loss Integration Into Pwm Equivalent Circuitmentioning

confidence: 99%