Portable Lorentz Force Eddy Current Testing System With Rotational Motion

In this paper, we investigate a new portable Lorentz force eddy current testing system using a diametrically magnetized cylindrical magnet rotating around its mass centroid axis. In order to compare the electromagnetic torque caused by the Lorentz force and the induced voltage generated by the secon...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2018-03, Vol.54 (3), p.1-4
Main Authors: Schmidt, Reinhard, Otterbach, Jan Marc, Ziolkowski, Marek, Brauer, Hartmut, Toepfer, Hannes
Format: Article
Language:English
Subjects:
Computer simulation
Eddy current testing
Eddy currents
Electric potential
finite element analysis
Induced voltage
Lorentz covariance
Lorentz force
Magnetic domains
Magnetism
Magnetization
nondestructive testing (NDT)
Permanent magnets
rotation of permament magnets
Torque
Transient analysis
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Summary:In this paper, we investigate a new portable Lorentz force eddy current testing system using a diametrically magnetized cylindrical magnet rotating around its mass centroid axis. In order to compare the electromagnetic torque caused by the Lorentz force and the induced voltage generated by the secondary magnetic field, three different model approaches are considered: the weak reaction approach and the quasi-stationary approach as approximating approaches and the transient simulation as a reference one. The experimental results of the induced voltage in the coil surrounding the permanent magnet are compared with the results of the transient solution. In an additional simulation a possible imperfection of the real system and its influence is studied.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2017.2762163