The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Liyi Li - One of the best experts on this subject based on the ideXlab platform.
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Thermal Analysis of a Hybrid Excitation Linear Eddy Current Brake
IEEE Transactions on Industrial Electronics, 2019Co-Authors: Liyi LiAbstract:In this paper, the thermal analysis of a hybrid excitation linear Eddy Current brake is presented. The air gap flux of the hybrid excitation linear Eddy Current brake is provided by the excitation windings and the permanent magnets. Therefore, the braking force produced by the Eddy Current brake is large and controllable. But, on the other hand, there is a high heating value in the excitation windings and conductor plate; hence, it is necessary to analyze thermal characteristics of the Eddy Current brake to avoid the declination of braking performance or even damage of the device. First, the structure and working principle of the Eddy Current brake are described. Second, the analytical model of the Eddy Current brake is built, and then the thermal network model of the Eddy Current brake is built taking the actual airflow around the Eddy Current brake into consideration. Finally, the validity of the thermal network model is verified by steady and dynamic thermal experimental measurements.
Hartmut Brauer - One of the best experts on this subject based on the ideXlab platform.
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Comparison of defect detection limits in Lorentz force Eddy Current testing and classical Eddy Current testing
Journal of Sensors and Sensor Systems, 2018Co-Authors: Jan Marc Otterbach, Hartmut Brauer, Marek Ziolkowski, Reinhard Schmidt, Hannes TöpferAbstract:Abstract. Lorentz force Eddy Current testing (LET) is a motion-induced Eddy Current testing method in the framework of nondestructive testing. In this study, we address the question of how this method is classified in comparison with a commercial Eddy Current testing (ECT) measurement device ELOTEST N300 in combination with the probe PKA48 from Rohmann GmbH. Therefore, measurements using both methods are performed and evaluated. Based on the measurement results, the corresponding defect detection limits, i.e., up to which depth the defect can be detected, are determined and discussed. For that reason, the excitation frequency spectrum of the induced Eddy Currents in the case of LET is considered.
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Application of Lorentz force Eddy Current testing and Eddy Current testing on moving nonmagnetic conductors
International Journal of Applied Electromagnetics and Mechanics, 2014Co-Authors: Matthias Carlstedt, Konstantin Porzig, Mladen Zec, Marek Ziolkowski, Ronald P. Uhlig, Hartmut BrauerAbstract:Lorentz force Eddy Current testing is a novel nondestructive testing technique which can be applied preferably to the identification of internal defects in non-ferromagnetic moving conductors. This paper describes the comparison of this new technique with well-known Eddy Current testing. Measurements and numerical simulations have been done for both techniques for artificial subsurface defects in a test specimen made of Aluminum alloy moving with constant velocity.
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Comparison of Lorentz force Eddy Current testing and common Eddy Current testing-measurements and simulations
Studies in Applied Electromagnetics and Mechanics, 2014Co-Authors: Matthias Carlstedt, Konstantin Porzig, Hartmut Brauer, Marek Ziolkowski, Ronald P. Uhlig, Hannes ToepferAbstract:Lorentz force Eddy Current testing (LET) is a novel nondestructive testing technique which can be applied preferably to the identification of internal defects in nonmagnetic moving conductors. The paper describes the comparison with established Eddy Current testing technique. The investigation of the performance of LET has been performed providing a qualified comparison (similar testing conditions) with the classical Eddy Current testing (ECT). Additionally, numerical simulations have been done. The results are compared with measurements to test the feasibility of defect identification. © 2014 The authors and IOS Press.
Marek Ziolkowski - One of the best experts on this subject based on the ideXlab platform.
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Comparison of defect detection limits in Lorentz force Eddy Current testing and classical Eddy Current testing
Journal of Sensors and Sensor Systems, 2018Co-Authors: Jan Marc Otterbach, Hartmut Brauer, Marek Ziolkowski, Reinhard Schmidt, Hannes TöpferAbstract:Abstract. Lorentz force Eddy Current testing (LET) is a motion-induced Eddy Current testing method in the framework of nondestructive testing. In this study, we address the question of how this method is classified in comparison with a commercial Eddy Current testing (ECT) measurement device ELOTEST N300 in combination with the probe PKA48 from Rohmann GmbH. Therefore, measurements using both methods are performed and evaluated. Based on the measurement results, the corresponding defect detection limits, i.e., up to which depth the defect can be detected, are determined and discussed. For that reason, the excitation frequency spectrum of the induced Eddy Currents in the case of LET is considered.
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Application of Lorentz force Eddy Current testing and Eddy Current testing on moving nonmagnetic conductors
International Journal of Applied Electromagnetics and Mechanics, 2014Co-Authors: Matthias Carlstedt, Konstantin Porzig, Mladen Zec, Marek Ziolkowski, Ronald P. Uhlig, Hartmut BrauerAbstract:Lorentz force Eddy Current testing is a novel nondestructive testing technique which can be applied preferably to the identification of internal defects in non-ferromagnetic moving conductors. This paper describes the comparison of this new technique with well-known Eddy Current testing. Measurements and numerical simulations have been done for both techniques for artificial subsurface defects in a test specimen made of Aluminum alloy moving with constant velocity.
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Comparison of Lorentz force Eddy Current testing and common Eddy Current testing-measurements and simulations
Studies in Applied Electromagnetics and Mechanics, 2014Co-Authors: Matthias Carlstedt, Konstantin Porzig, Hartmut Brauer, Marek Ziolkowski, Ronald P. Uhlig, Hannes ToepferAbstract:Lorentz force Eddy Current testing (LET) is a novel nondestructive testing technique which can be applied preferably to the identification of internal defects in nonmagnetic moving conductors. The paper describes the comparison with established Eddy Current testing technique. The investigation of the performance of LET has been performed providing a qualified comparison (similar testing conditions) with the classical Eddy Current testing (ECT). Additionally, numerical simulations have been done. The results are compared with measurements to test the feasibility of defect identification. © 2014 The authors and IOS Press.
Shen Wang - One of the best experts on this subject based on the ideXlab platform.
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The Pulsed Eddy Current Testing
New Technologies in Electromagnetic Non-destructive Testing, 2016Co-Authors: Songling Huang, Shen WangAbstract:As one kind of Eddy Current testing technology, the pulsed Eddy Current testing technology is based on the principle of electromagnetic induction and is used to detect the defects in conductive materials. The principle of pulsed Eddy Current testing is basically the same as that of traditional Eddy Current testing, and differences are the means of excitation and the signal analysis method.
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Low-Frequency Eddy Current Testing
New Technologies in Electromagnetic Non-destructive Testing, 2016Co-Authors: Songling Huang, Shen WangAbstract:Eddy Current testing is a nondestructive testing method based on electromagnetic induction principle. The metal conductor is placed in an alternating magnetic field, and the Eddy Current will be induced. Hughes used the induced Current method to detect the different metals and alloys, explained the feasibility of using the Eddy Current to detect defects of the conductive material in 1879. However, after that for a long period of time, the Eddy Current testing technology has developed slowly because there were no effective methods to suppress the interference factors.
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The Remote-Field Eddy Current Testing
New Technologies in Electromagnetic Non-destructive Testing, 2016Co-Authors: Songling Huang, Shen WangAbstract:The remote-field Eddy Current (RFEC) testing is a special Eddy Current testing technology that utilizes the characteristics of the remote-field region of the Eddy Current to detect the defects and was applied in the inner inspection of small caliber pipeline first.
Matthias Carlstedt - One of the best experts on this subject based on the ideXlab platform.
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Application of Lorentz force Eddy Current testing and Eddy Current testing on moving nonmagnetic conductors
International Journal of Applied Electromagnetics and Mechanics, 2014Co-Authors: Matthias Carlstedt, Konstantin Porzig, Mladen Zec, Marek Ziolkowski, Ronald P. Uhlig, Hartmut BrauerAbstract:Lorentz force Eddy Current testing is a novel nondestructive testing technique which can be applied preferably to the identification of internal defects in non-ferromagnetic moving conductors. This paper describes the comparison of this new technique with well-known Eddy Current testing. Measurements and numerical simulations have been done for both techniques for artificial subsurface defects in a test specimen made of Aluminum alloy moving with constant velocity.
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Comparison of Lorentz force Eddy Current testing and common Eddy Current testing-measurements and simulations
Studies in Applied Electromagnetics and Mechanics, 2014Co-Authors: Matthias Carlstedt, Konstantin Porzig, Hartmut Brauer, Marek Ziolkowski, Ronald P. Uhlig, Hannes ToepferAbstract:Lorentz force Eddy Current testing (LET) is a novel nondestructive testing technique which can be applied preferably to the identification of internal defects in nonmagnetic moving conductors. The paper describes the comparison with established Eddy Current testing technique. The investigation of the performance of LET has been performed providing a qualified comparison (similar testing conditions) with the classical Eddy Current testing (ECT). Additionally, numerical simulations have been done. The results are compared with measurements to test the feasibility of defect identification. © 2014 The authors and IOS Press.
