Research on Torque Ripple Suppression of the Slotted Limited Angle Torque Motor

• Published in: IEEE transactions on magnetics Vol. 57; no. 2; pp. 1 - 6
• Main Authors: Ma, Pengcheng, Wang, Qian, Li, Yong, Jiang, Shanlin, Zhao, Meng
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-02-2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Armature; Auxiliary slot; Cogging; cogging torque; Distortion; Finite element method; Forging; irregular slot number; limited angle torque motor (LATM); magnet inclination; Magnetic flux; Magnetism; Optimization; Prototypes; slot inclination; Stators; Torque; torque distortion; Torque measurement; Torque motors; torque-angle characteristic
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2020.3006018

This article presents the theoretical analysis and numerical modeling of various cogging torque suppression methods of the slotted limited angle torque motor (LATM). The relationship between the cogging torque, the output characteristics, and the structure parameters of new methods is revealed by derived equations and finite-element analysis (FEA), which provides a theoretical basis for the optimization of the slotted LATM. The effectiveness of the best suppression method is verified by the prototype experiment. In addition, a method to predict torque distortion caused by armature reaction is proposed and it is verified by the finite-element simulation and prototype experiment.