Analysis of Dynamic Unbalanced Magnetic Pull in Induction Motor With Dynamic Eccentricity During Starting Period

• Published in: IEEE transactions on magnetics Vol. 52; no. 7; pp. 1 - 4
• Main Authors: Zhou, Yang, Bao, Xiaohua, Di, Chong, Wang, Lang
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.07.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Curved; dynamic eccentricity; Dynamic tests; dynamic UMP; Dynamics; Eccentricity; Force; Induction motors; Magnetic analysis; Magnetic flux; Magnetic pull; Magnetism; Mathematical analysis; Motors; Rotors; starting period; Stators; Steady state; starting period; Dynamic eccentricity (DE); dynamic unbalanced magnetic pull (UMP)
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2016.2520950

In practical motors, static eccentricity and dynamic eccentricity (DE) (mixed eccentricity) appear rarely with the developed manufacturing techniques nowadays. Curved eccentricity takes up most of the eccentricity. However, the motor is dynamic eccentric in axial cross section when in curved eccentricity. Eccentricity is bound to cause unbalanced magnetic pull (UMP), whereas the study of dynamic UMP under DE in this paper has rarely been mentioned before. According to relevant past papers, UMP is deemed to be invariable numerically. Dynamic UMP is put forward formally for the first time. In addition, UMP during the starting period is a function with time, relatively larger than the steady-state UMP according to the calculation in this paper, namely, UMP during starting period is of greater significance in motor deflection calculation than that during the steady state. The finite-element software is used to analyze the dynamic UMP accurately.