Abstract
A comprehensive model is a basis for adequately understanding the energy conversion mechanism of magnetostrictive materials and guides the design of magnetostrictive devices. This paper established a fully coupled model that fully considered the piezomagnetic effect and the electromagnetic effect in its procedure of energy conversion. The proposed model can accurately predict the output voltage with different excitation levels and illustrate the interaction between physical fields. Based on the established model, we quantify the voltage contributed by the piezomagnetic effect and the electromagnetic effect. After a thorough analysis, we discovered that even though the voltage generation is always dominated by the piezomagnetic effect of the magnetostrictive material, the proportion from the electromagnetic effect will increase moderately with larger excitation levels. In addition, the magnetostrictive effect toward the output performance is also discussed, which proved to lead to a marginal impact on the voltage waveform.
Highlights
With the rapid popularization and application of Internet of Things (IoT) technology, artificial intelligence (AI) technology, and flexible electronics technology, various transducers have been applied to microactuators, microsensors, and micro-energy harvesters.1–3 Among all kinds of energy conversion materials of the transducer, magnetostrictive materials have attracted the attention of researchers, and their excellent mechanical properties are suitable for various harsh working environments.4–7To further improve the energy conversion efficiency of the magnetostrictive transducer (MT), establishing a comprehensive model is helpful to understand the energy conversion mechanism of magnetostrictive materials and effectively guides the structural design and optimization
Based on the theoretical simulation and experimental verification, the voltage contributed by the piezomagnetic effect and the additive voltage from the electromagnetic effect is studied, which illustrates the interaction between different physical fields more straightforwardly
The proposed model will illustrate the interaction between different physical fields and study the voltage contributed by the piezomagnetic effect and the electromagnetic effect
Summary
With the rapid popularization and application of Internet of Things (IoT) technology, artificial intelligence (AI) technology, and flexible electronics technology, various transducers have been applied to microactuators, microsensors, and micro-energy harvesters. Among all kinds of energy conversion materials of the transducer, magnetostrictive materials have attracted the attention of researchers, and their excellent mechanical properties are suitable for various harsh working environments.. As for the non-linear models, most of them focused on non-linearity in the material itself, rather than the fully magneto-mechanical coupling procedure of the magnetostrictive devices. For magnetostrictive transducers, most of the current non-linear model methods adopt a weakly coupled model without considering the mutual interaction between different physical fields.. The rest of this paper is summarized as follows: In Sec. II, the basic structure and working principle of the magnetostrictive transducer are expounded; Sec. III establishes the holistic theoretical model; Sec. IV covers the coupling relationship between different models and the simulation procedure; the experimental setup is introduced in Sec. V; Sec. VI compares the simulation and experimental results and analyzes the influence of different effects; and Sec. VII concludes the work
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