Reduction of the Torque Ripple and Magnetic Force of a Rotatory Two-Phase Transverse Flux Machine Using Herringbone Teeth

• Published in: IEEE transactions on magnetics Vol. 44; no. 11; pp. 4066 - 4069
• Main Authors: AHN, Heetae, JANG, Gunhee, CHANG, Junghwan, CHUNG, Shiuk, KANG, Dohyun
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01-11-2008; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Finite element methods; Geometry; Herringbone teeth; Magnetic flux; Magnetic forces; Magnetism; Materials science; Other topics in materials science; Permanent magnets; Physics; Rotors; Soft magnetic materials; Stator windings; Teeth; Torque; torque ripple; transverse flux machine (TFM); unbalanced magnetic force; unbalanced magnetic force; transverse flux machine (TFM); Machine; Herringbone teeth; torque ripple; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2008.2001586

The transverse flux machine (TFM) is a promising driving machine, especially for the low-speed applications, because it has greater power density, torque, and efficiency than the conventional electrical motors. However, the TFM has a complicated structure, a large torque ripple, and, occasionally, an unbalanced magnetic force. This paper investigates the effects of teeth geometry on torque ripple and unbalanced magnetic force in a rotatory two-phase TFM using the 3-D finite element method, and proposes a rotatory two-phase TFM with herringbone teeth to reduce the torque ripple and eliminate the unbalanced magnetic force.