Effect of magnetic hysteresis on rotational losses in heteropolar magnetic bearings

• Published in: IEEE transactions on magnetics Vol. 40; no. 5; pp. 3302 - 3307
• Main Authors: Meeker, D.C., Filatov, A.V., Maslen, E.H.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.2004; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Eddy current testing; Electromagnetic losses; Electromagnetic modeling; Exact sciences and technology; Hysteresis; Magnetic bearings; Magnetic fields; Magnetic flux; Magnetic hysteresis; Magnetic levitation; Magnetic losses; Magnetic materials; Magnetic properties and materials; Magnetism; Mathematical models; Permeability; Physics; Power system harmonics; Rotational; Rotors; Torque; Magnetic materials; rotational loss; magnetic bearings; magnetic hysteresis; Eddy currents
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2004.831664

This paper extends a method for predicting rotational losses for laminated rotors of heteropolar magnetic bearings by using an eddy-current model to include the effect of magnetic hysteresis in the rotor material. It compares the modeling results to the experimental data that were used earlier to assess the loss model neglecting hysteresis. The correction to the total electromagnetic loss in the rotor due to the hysteresis is significant at rotational speeds below 6000 revolutions per minute (RPM), where the model including hysteresis effects provides much better agreement with existing experimental data.