Hysteresis and Magnetic Barkhausen Noise for SAE 1020 and 1045 Steels With Different Microstructures

Costa, L F T; Campos, Marcos Flávio de; Gerhardt, Günther J.L.; Missell, F.P.

doi:10.1109/tmag.2013.2287701

Cited by 7 publications

(7 citation statements)

References 10 publications

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“…As shown in Figure 4 is the model consists of a shaft and a rotor. The rotor outer diameter is 370mm, the inner diameter is 50mm, and the rotor material is made of low carbon steel 1020 [3,14]. Assumption was made for 160kW of air-cooled eddy current dynamometer, that each rotor absorbs 80kW of power (i.e., the dynamometer consisted of 2 rotors, with each at front and back end).…”

Section: Methodsmentioning

confidence: 99%

Numerical Simulation of High-Speed Rotor for Air-cooled Eddy Current Dynamometer

Teoh

Lau

How

et al. 2022

ARFMTS

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The key feature of air-cooled dynamometer is the geometry of the rotor, which played a vital role in effective heat rejection. Dual application is limited for air cooled eddy current dynamometer due to excessive heat generation when the operating speed is up to a certain range. The aim of this research is to observe the air flow pattern and temperature distribution on the rotor of the air-cooled dynamometer with different geometry designs. In addition, the air flow and heat transfer simulation were carried out by using ANSYS software. Besides, the setting of normal size mesh was proposed in all design cases to reduce the computational time and the mesh files size of the simulation. Furthermore, a total of four configurations of rotating domain were designed and created using SolidWorks software, with each one differentiated with the features of holes and cover. The results of air flow velocity contour were compared with those of without the cover and holes on the rotor design. The optimum design in air motion distributed within all cases of numerical simulation were then observed and compared. To validate the simulation setup, experimental data were used to validate the airflow and heat transfer coupling simulation models. The results revealed that an improvement with more air volume movement can be observed at medium range and high velocity range for all models with cover features over the models without cover. Besides, the results also shows that the influences of hole features on air flow velocity were less significant as compared to the one with cover features. Also, the rotor design with cover and without holes were found to be the best configuration as it allows the as high as 27.7% greater air flow dynamic to achieved lowest steady state temperature as compared with those of baseline design. The Design C also improved in term of temperature as compared to the simple model of plane rotor, with as high as 11.6% reduction in overall temperature. Through the results of this analysis, it was justifiable that the Design C can be suggested as the best-case scenario for further experimental study. These results will serve as a basis for rotor design to improve the performance of the air-cooled eddy current dynamometer.

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Section: Methodsmentioning

confidence: 99%

Numerical Simulation of High-Speed Rotor for Air-cooled Eddy Current Dynamometer

Teoh

Lau

How

et al. 2022

ARFMTS

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“…The quenched 1045 sample was cooled in water after austenitization, generating a martensite structure. More information about the samples, their chemical compositions and their microstructures can be found in previous studies [4,5].…”

Section: Methodsmentioning

confidence: 99%

“…The presented data are the average considering several Barkhausen envelopes. More details about the experimental procedure of hysteresis and MBN measurement were previously reported [4]. [2,3].…”

Section: Methodsmentioning

confidence: 99%

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Interpretation of Magnetic Barkhausen Noise Bursts in Low Frequency Measurements

et al. 2019

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Experimental results allow the identification of three main magnetic Barkhausen noise bursts, each occurring at a different applied field. Magnetostrictive effects can be related to the 1st and 3rd bursts, because closure domain walls are created and/or eliminated. The 2nd burst occurs at the coercive field and it is usually the most intense, and is attributed to domain wall movement. The analysis of the three main bursts gives an important insight on how stress may affect the losses and magnetic Barkhausen noise. A brief review is also presented about the magnetic Barkhausen noise technique.

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“…Before running the FEA simulations, determining the magnetic properties of the motor materials is important to achieve accurate results [28]. The motor lamination material is M400 electrical steel, and the shaft material is 1040 steel.…”

Section: Fea Simulationsmentioning

confidence: 99%

Modified Induction Machine Equivalent Circuit Including Solid Shaft Eddy Currents

Tekgun

2023

Machines

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The shaft eddy currents cause a significant saturation in two-pole induction machines (IMs) as they generate an opposing field and repulse the main flux, thus tightening the flux path. This results in inaccurate performance estimations with the magnetizing inductance measured in no-load conditions when the machine is loaded. This article presents a modified IM equivalent circuit considering the rotor back iron saturation effects caused by the solid shaft eddy currents using experimental measurements and recursive parameter estimation techniques. The classical equivalent circuit (CEC) parameters are determined with the standard test techniques followed by the parameter estimation of the newly introduced modified equivalent circuit (MEC) parameters. The proposed modified equivalent circuit is benchmarked with CEC and finite element analysis (FEA) simulations with and without considering eddy effects. The proposed MEC model and the FEA that consider eddy effects performed better than the other models and yielded a negligibly small error over a wide range of loading conditions. Compared to the FEA, the proposed MEC estimates the IM performance much faster, which makes it more appealing for IM performance estimations.

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Hysteresis and Magnetic Barkhausen Noise for SAE 1020 and 1045 Steels With Different Microstructures

Cited by 7 publications

References 10 publications

Numerical Simulation of High-Speed Rotor for Air-cooled Eddy Current Dynamometer

Numerical Simulation of High-Speed Rotor for Air-cooled Eddy Current Dynamometer

Interpretation of Magnetic Barkhausen Noise Bursts in Low Frequency Measurements

Modified Induction Machine Equivalent Circuit Including Solid Shaft Eddy Currents

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