Development of 72/96-pole rare-earth free permanent magnet reluctance generator for small-scale renewable power generation

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7 Citations (Scopus)

Abstract

This paper discusses a super-multipolar permanent magnet reluctance generator (PMRG) for small-scale renewable power generation. The PMRG has 72 stator poles and 96 rotor poles in order to be directly connected to the turbine without a gear box. The designed PMRG has a rated power of over 1.0 kW at 100 rpm. The PMRG has two features to reduce torque ripple; a two-stacked structure where one rotor is shifted by an electrical angle of 180 degrees from the other rotor; and chamfered rotor pole-tips so that the torque waveform consists of only odd harmonics. This structure drastically reduces the torque ripple of the PMRG. The shape of the rotor pole-tips was first optimized by the two-dimensional finite element method (2D-FEM) coupled with a general-purpose optimization program. Next, the load characteristics of the PMRG obtained from 3D-FEM were considered. Finally, the characteristics of the developed 72/96-pole PMRG were measured.

Original languageEnglish
Pages (from-to)41-46
Number of pages6
JournalIEEJ Journal of Industry Applications
Volume3
Issue number1
DOIs
Publication statusPublished - 2014

Keywords

  • Chamfered pole-tips
  • Permanent magnet reluctance generator (PMRG)
  • Small-scale renewable power generation
  • Torque ripple reduction
  • Two-stacked structure

ASJC Scopus subject areas

  • Automotive Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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