Quality factor, static and dynamic responses of miniature galfenol actuator at wide range of temperature

Ghodsi, Mojtaba; Modabberifar, Mehdi; Ueno, Takahiro

doi:10.5897/ijps11.918

Cited by 11 publications

(8 citation statements)

References 4 publications

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“…In this control system, the TEC is switched ON as the temperature is more than 25 ºC. Based on the dynamic behavior, resonance frequency of the actuator [5,31] and model identification [32][33][34][35] of actuator, a Proportional-Integral (PI)…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, piezoelectric needs high voltage. It was shown that Magnetostrictive materials are good candidates to operate in low temperature and low voltage [5]. However, the problem of magnetostrictive material is the heat generated by coil which increases the temperature.…”

Section: Introductionmentioning

confidence: 98%

“…Since strains of piezoelectric and magnetostrictive materials are small compared to the shape memory alloys and electro active polymers and magnetorholocical, different magnifying mechanisms were presented [5,8,16]. For examples micro amplification mechanism with sub-nanometer resolution in microelectronics industries were developed by micro positioning stages using lever mechanism and piezoelectric.…”

Section: Introductionmentioning

confidence: 99%

“…Terfenol-D [1][2][3][4], Galfenol [5][6] and Permandure [7][8] are widely used as actuation elements in the new generations of actuators [9][10][11] while these materials are widely used in sensors [12,13] and energy saving systems too [14]. Piezoelectric elements like Lead Zirconate Titanate (PZT) have also today numerous applications in electro-mechanical systems such as actuators for medical applications [15][16], health monitoring transducers [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Elimination of thermal instability in precise positioning of Galfenol actuators

et al. 2016

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This paper presents a new method to eliminate deviation in positioning caused by coil's heat generation in magnetostrictive actuators. The advantages of the proposed system are compactness, high controllability and high reliability. The actuator package consists of Galfenol as active element and a magnification mechanism combined with a Peltier element or thermoelectric cooler (TEC). By using the temperature sensor, a thermoelectric cooler (TEC) is activated to reduce the temperature of the coil. However, the reduction of temperature by TEC alone is not enough to eliminate the error and controlling of applied voltage is also required. A simple PI controller for coil's current is combined with TEC and by reducing the temperature and current simultaneously, the positioning error is vanished completely.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Elimination of thermal instability in precise positioning of Galfenol actuators

et al. 2016

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“…Design and computation of a standard longitudinal mode magnetostrictive actuator has been considered in [14]. Ghodsi et al exploited magnetostrictive material to manufacture a bending [15] and longitudinal mode actuator [16]. Another researcher has been developing for some time [17][18][19][20][21][22][23][24][25] magnetostrictive sensors which generate and sense torsional waves for the purpose of nondestructive evaluation, and not for actuator applications.…”

Section: Introductionmentioning

confidence: 99%

Development of Magnetostrictive Resonant Torsional Vibrator

Karafi¹,

Ghodsi²,

Hojjat³

2015

IEEE Trans. Magn.

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In this paper, the design, construction, and operation of a magnetostrictive resonant torsional vibrator is described. To generate torsional vibration, two magnetostrictive patches are bonded on an aluminium horn. Two magnetic fields, longitudinal and circumferential, are applied into the patches. As a result, magnetostrictive patches vibrate torsionally based on the Wiedemann effect. The magnetostrictive patches are made up of "2V permendur" which has isotropic magnetic properties. The principle of the torsional vibrator is explained, and differential equations of torsional vibration of the horn are derived. A torsional horn is designed for resonant frequency of 8515 Hz. Experimental results show that the torsional angle of the tip of the horn is rad. This type of vibrator is exploited in applications which require torsional vibration such as miniature ultrasonic motors or ultrasonic assisted bone drilling system. In other words, the vibrator is being used as an actuator.

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Design of Galfenol and Alfenol microstructures for bending mode energy harvesters

Çallıoğlu

Acar

2020

J Mater Sci

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The present work addresses the microstructural design of Galfenol and Alfenol, which are magnetostrictive materials used in bending mode energy harvesters. Galfenol and Alfenol have been attracting much interest during the last few decades as they provide bi-directional coupling between mechanical and magnetic properties.This magneto-mechanical coupling generates electrical energy in distinctive energy harvesting mechanisms that use mechanical or magnetic input. One favorable approach would be enhancing the energy efficiency by optimizing the material properties through the control and design of the underlying microstructure. However, to the best of our knowledge, there is no effort for designing Galfenol and Alfenol microstructures to maximize energy efficiency. Therefore, we present a computational design study to find the optimum Galfenol and Alfenol microstructures that can maximize the energy efficiency for bending mode energy harvesters. We model the effects of the crystallographic texture on the mechanical and magnetic properties and develop a computational model to represent the magneto-mechanical coupling.The outcomes of our computational strategy revealed that the optimum design solutions are highly textured polycrystals. Moreover, the optimum Galfenol and Alfenol microstructures are found to provide around 80% and 32% energy efficiency, which are higher than the known optimum efficiency level for the same materials.

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Quality factor, static and dynamic responses of miniature galfenol actuator at wide range of temperature

Cited by 11 publications

References 4 publications

Elimination of thermal instability in precise positioning of Galfenol actuators

Elimination of thermal instability in precise positioning of Galfenol actuators

Development of Magnetostrictive Resonant Torsional Vibrator

Design of Galfenol and Alfenol microstructures for bending mode energy harvesters

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