Effect of additional harmonics of driving current on torque ripple and unbalanced magnetic force of the BLDC motors with stator and rotor eccentricities

S. J. Sung, Gunhee Jang, K. J. Kang, J. Y. Song

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper investigates the characteristics of the torque ripple and UMF in the BLDC motor with stator and rotor eccentricities due to additional harmonics of the driving current. Torque ripple can be divided into cogging torque due to the interaction between poles and slots, and commutation torque ripple due to driving current. Additional harmonics of driving current affect the characteristics of torque ripple. UMF is not generated in rotational symmetric motors with respect to pole, slot and winding configurations. However, stator and rotor eccentricities of BLDC motors generate additional harmonics on cogging torque and UMF. This research theoretically and numerically investigates the effects of driving current on the torque ripple and UMF of a BLDC motor with rotor and stator eccentricities. It shows that additional harmonics of the driving current, the stator eccentricity, and the rotor eccentricity independently affect the torque ripple. It also shows that additional harmonics of the driving current generate additional harmonics in UMF if BLDC motors have the stator or rotor eccentricities.

Original languageEnglish
Title of host publicationASME 2014 Conference on Information Storage and Processing Systems, ISPS 2014
PublisherWeb Portal ASME (American Society of Mechanical Engineers)
ISBN (Electronic)9780791845790
DOIs
Publication statusPublished - 2014 Jan 1
EventASME 2014 Conference on Information Storage and Processing Systems, ISPS 2014 - Santa Clara, United States
Duration: 2014 Jun 232014 Jun 24

Other

OtherASME 2014 Conference on Information Storage and Processing Systems, ISPS 2014
CountryUnited States
CitySanta Clara
Period14/06/2314/06/24

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Sung, S. J., Jang, G., Kang, K. J., & Song, J. Y. (2014). Effect of additional harmonics of driving current on torque ripple and unbalanced magnetic force of the BLDC motors with stator and rotor eccentricities. In ASME 2014 Conference on Information Storage and Processing Systems, ISPS 2014 Web Portal ASME (American Society of Mechanical Engineers). https://doi.org/10.1115/ISPS2014-6913