Evaluation electromagnetic contactor magnetic core temperature and dynamic strain using fiber Bragg gratings

Tapia, Cesar Caytuiro; Ortiz, Jorge Luis Roel; Dreyer, Uilian José; Silva, Jean Carlos Cardozo da; Sousa, Kleiton de Morais

doi:10.1016/j.measurement.2020.108174

Cited by 17 publications

(4 citation statements)

References 18 publications

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“…The movement of the armature provokes the closing of the contact. After removing the electrical current, the restoration force of the spring returns the contact to the open condition [17]. Fig.…”

Section: A Experimental Setupmentioning

confidence: 99%

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Features Extraction for Classification in Switching Devices using Fiber Bragg Grating

Benetti

Dureck

Dreyer

et al. 2023

J. Microw. Optoelectron. Electromagn. Appl.

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Vibration analysis systems are used to assess the operational condition of machines and electromechanical components in various applications. This work presents a measurement and feature extraction system that analyzes dynamic strain patterns in signals measured by fiber Bragg grating (FBG). The features were used to identify different simulated operational conditions in an electromechanical relay. The selection of the best feature space in the first approach was performed by statistical criteria that determine the threshold values and frequency bands to calculate each signal's switching time and power spectral density (PSD). These parameters are used in the support vector machine (SVM) algorithm, which presents 98 % accuracy for distinguishing four distinct conditions. Another methodology for extracting features, called wavelet scattering transform (WST), was used to demonstrate that it is possible to achieve even better performance levels. The results allow extending the methodology to more complex systems.

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Section: A Experimental Setupmentioning

confidence: 99%

“…A standard value for the FBG fiber used in this work has pe = 0.2126. For a Bragg wavelength between 1530 and 1560 nm, the conversion of the wavelength shift in picometer scale (pm) to relative strain in the microstrain scale (µε) is presented in (3) [17].…”

Section: A Experimental Setupmentioning

confidence: 99%

Features Extraction for Classification in Switching Devices using Fiber Bragg Grating

Benetti

Dureck

Dreyer

et al. 2023

J. Microw. Optoelectron. Electromagn. Appl.

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“…Electromagnetic relays and contactors belong to linear electromagnetic actuators (LEAs), which also include solenoid valves [8][9][10]. LEAs are widely used in tokamaks and theuir peripheral equipment, such as solenoid valves in gas injection systems, contactors in power distribution systems, and electromagnetic relays in control systems.…”

Section: Introductionmentioning

confidence: 99%

Dynamic performance of linear electromagnetic actuators in a stray magnetic field: theoretical analysis and experimental verification

Wang

Yang²,

Wang³

et al. 2022

Plasma Sci. Technol.

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Linear electromagnetic actuators (LEAs) are widely used in tokamaks, but they are extremely sensitive to and are prone to fail in high-strength stray magnetic field (SMF) which is usually a concomitant with tokamaks. In this paper, a multi-physics coupling analysis model of LEA including magnetic field, electric circuit and mechanical motion is proposed, and the dynamic characteristics of LEA in SMF are studied in detail based on the proposed model. The failure mechanism of LEA in SMF is revealed, and the influence of SMF on the dynamic performance of LEA is studied and quantified. It is shown that, the failure threshold of the LEA selected in this work under the rated condition is 27 mT and 14 mT in the positive and negative direction, respectively. Under a typical SMF of 10 mT in the negative direction, the closing time of the LEA will be extended 40%, while its opening time will be shortened about 10%. Experimental tests are also conducted, which verify the validity of the proposed model and the analysis results. This paper provides a basis for the diamagnetic optimization design of LEA, and it is of great significance to ensure the reliable operation of tokamak.

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“…In recent decades, a variety of fiber sensors based on Mach-Zehnder Interference [6][7][8][9][10][11][12][13][14][15][16] (MZI), fiber Bragg grating [17][18][19][20][21][22] (FBG), Fabry-Pérot [23][24][25][26] (F-P), Sagnac [27], surface plasmon resonance [28] (SPR) and Michelson [29] have been exhibited. Some products have been flexibly applied in various places out of the laboratory.…”

Section: Introductionmentioning

confidence: 99%

Temperature fiber sensor without cross sensitivity based on the multi-thin-no-thin-multi fiber coated with PDMS

Li¹,

Liu²,

Qu³

et al. 2021

J. Phys. D: Appl. Phys.

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A novel temperature fiber sensor based on the multi-thin-no-thin-multi fiber (MTNTM-F) with Mach-Zehnder interference was presented. By comparing the interference spectra of the multi-thin-multi fiber and MTNTM-F, the MTNTM-F with more available dips and greater extinction ratio was selected. By simulating the energy distribution in the fiber, it was proved that there was a lot of energy in the cladding, which was beneficial to the interaction between the light and the external material. In order to improve the temperature sensitivity of the sensor, polydimethylsiloxane with large thermo optic coefficient and thermal expansion coefficient was selected to coat the fiber. Identical temperature sensing experiments were performed for untreated and coated fibers. The temperature sensitivity changed from 25.38 pm °C−1 to 65.24 pm °C−1, which was a 2.56 times improvement, and an ideal temperature stability was demonstrated. At the same time, an anti-turbulence adjunct experiment was conducted to investigate the ability of the sensor to avoid turbulence cross sensing.

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Evaluation electromagnetic contactor magnetic core temperature and dynamic strain using fiber Bragg gratings

Cited by 17 publications

References 18 publications

Features Extraction for Classification in Switching Devices using Fiber Bragg Grating

Features Extraction for Classification in Switching Devices using Fiber Bragg Grating

Dynamic performance of linear electromagnetic actuators in a stray magnetic field: theoretical analysis and experimental verification

Temperature fiber sensor without cross sensitivity based on the multi-thin-no-thin-multi fiber coated with PDMS

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