One-sided fluxes in planar, cylindrical, and spherical magnetized structures

• Published in: IEEE transactions on magnetics Vol. 36; no. 2; pp. 440 - 451
• Main Authors: Shute, H.A., Mallinson, J.C., Wilton, D.T., Mapps, D.J.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.03.2000; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Electric motors; Electrical engineering. Electrical power engineering; Electrical machines; Exact sciences and technology; Fluxes; Fourier transforms; Magnetic domains; Magnetic fields; Magnetic flux; Magnetic properties; Magnetic recording; Magnetism; Magnetization; Mathematical analysis; Permanent magnets; Planar structures; Electrical engineering; Brushless DC motors; Theoretical study; Brushless machine; Laplace equation; Magnetic structure; Permanent magnet; Magnetic field; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/20.825805

In planar structures, magnetization patterns exist that have the surprising property that all the external fringing field of flux emerges from one side of the structure, with precisely none appearing on the other side. In the last 25 years, this fact has led to a number of useful applications. More recently, the same concept has been found to hold for both cylindrical and spherical hollow structures, where all the fringing flux emerges either inside or outside the structure, with precisely none appearing on the other side. Again, this has led to a number of important practical applications. While many of the concepts have been published previously, this paper contains, for the first time, a uniform mathematical analysis of these one-sided flux configurations. Additionally, the paper reviews the principal applications of one-sided flux structures.