Outer-rotor type permanent magnet reluctance generator with high power and low toque ripple

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

Abstract

This paper presents an outer-rotor type permanent magnet reluctance generator (PMRG) for a small-scale wind-turbine and micro-hydroelectric power generation. First, this paper describes a PMRG using ferrite magnets. Residual magnetic flux density of the ferrite magnet is about three times lower than the rare-earth magnet, but the cost is about 10 times lower. It is demonstrated that the proposed PMRG with ferrite magnets has almost the same output power as that using rare-earth magnets by employing an outer-rotor structure. Next, a method for reducing torque ripple of the PMRG by stacking two rotors is proposed. One rotor is shifted by 180° in electrical angle from the other rotor. In addition, the rotor pole-tips are chamfered so that the toque waveform consists of only odd harmonics. In such a structure, the torque ripple can be almost cancelled. A trial two-stacked outer-rotor PMRG demonstrates that the maximum output power is 777 W, the efficiency at the point is 84.5%, and torque ripple is very low.

Original languageEnglish
Title of host publicationProceedings - IECON 2010, 36th Annual Conference of the IEEE Industrial Electronics Society
Pages2248-2251
Number of pages4
DOIs
Publication statusPublished - 2010 Dec 1
Event36th Annual Conference of the IEEE Industrial Electronics Society, IECON 2010 - Glendale, AZ, United States
Duration: 2010 Nov 72010 Nov 10

Publication series

NameIECON Proceedings (Industrial Electronics Conference)

Other

Other36th Annual Conference of the IEEE Industrial Electronics Society, IECON 2010
CountryUnited States
CityGlendale, AZ
Period10/11/710/11/10

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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    Nakamura, K., Yoshida, J., & Ichinokura, O. (2010). Outer-rotor type permanent magnet reluctance generator with high power and low toque ripple. In Proceedings - IECON 2010, 36th Annual Conference of the IEEE Industrial Electronics Society (pp. 2248-2251). [5674933] (IECON Proceedings (Industrial Electronics Conference)). https://doi.org/10.1109/IECON.2010.5674933