Torque ripple reduction of radial magnetic gearbox using axial pole pairing

H. Zaytoon, Ayman Abdel-Khalik, A. Massoud, Shehab Ahmed, I. Elarabawy

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

2 Citations (Scopus)

Abstract

Magnetic gearbox (MGB) is a contactless magnet-based transmission system that transmits mechanical power between two shafts. MGBs offer significant advantages over mechanical gears such as contactless power transfer, high gear ratios, inherent overload protection, high torque density, potential for high efficiency, and maintenance free. Cogging torque minimization is a challenging design aspect and stands as one of the parasitic demerits of MGBs. The proper selection of the combination of the number of pole-pairs of both high and low speed rotors can effectively minimize cogging torque magnitude. However, only some fixed gear ratios can be achieved. For any general desired gear ratio, the torque ripple magnitude may be unacceptable. This paper introduces a new technique for torque ripple reduction in MGB using the axial pole pairing technique, which is usually applied for torque ripple mitigation in conventional PM machines. A conventional 14/4 MGB, which normally results in a significant cogging torque magnitude, is designed and simulated using 3D finite-element analysis (FEA) for different pairing angles for both high and low speed rotors. Based on 3D FEA results, the required optimum pairing angle that optimizes torque transmission while minimizes the corresponding cogging torque is determined.

Original languageEnglish
Title of host publication7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014
PublisherInstitution of Engineering and Technology
ISBN (Print)9781849198158
Publication statusPublished - 2014
Externally publishedYes
Event7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014 - Manchester, United Kingdom
Duration: 8 Apr 201410 Apr 2014

Other

Other7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014
CountryUnited Kingdom
CityManchester
Period8/4/1410/4/14

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Keywords

  • Cogging torque
  • Magnetic gear
  • Permanent magnet (PM) machines
  • Pole pairing
  • Torque ripples

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Zaytoon, H., Abdel-Khalik, A., Massoud, A., Ahmed, S., & Elarabawy, I. (2014). Torque ripple reduction of radial magnetic gearbox using axial pole pairing. In 7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014 Institution of Engineering and Technology.