"Negative" Hysteresis in Magnetoelastic Torque Transducers

Unusual manifestations of magnetomechanical hysteresis often observed in magnetoelastic torque transducers are described. Characterized by a remanent field at zero torque having a polarity opposite to that at the torque peak, this "negative" hysteretic effect is shown to be of magnetic ori...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2009-10, Vol.45 (10), p.4471-4474
Main Authors: Garshelis, I.J., Cuseo, J.M.
Format: Article
Language:English
Subjects:
Analytical models
Circumferences
Electromagnetic analysis
Electromagnetic fields
Electromagnetic wave polarization
Hysteresis
Magnetic analysis
Magnetic fields
Magnetic hysteresis
Magnetic materials
Magnetism
Magnetization
magnetoelasticicity
magnetomechanical hysteresis
Polarity
Simulation
Torque
torque transducer
Transducers
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Summary:Unusual manifestations of magnetomechanical hysteresis often observed in magnetoelastic torque transducers are described. Characterized by a remanent field at zero torque having a polarity opposite to that at the torque peak, this "negative" hysteretic effect is shown to be of magnetic origin and hypothesized to reflect axial magnetization of unpolarized material radially inward of the circumferentially polarized band. The retained portion of this magnetization at zero torque is shown both by analysis and experimental results with an electromagnetic simulator to be a source of magnetic field having opposite polarity to that present at the previous torque peak. When this field becomes larger than the normal positive remanent field it appears as negative hysteresis.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2009.2021848