Design and evaluation of a variable-flux flux-intensifying interior permanent magnet machine

Natee Limsuwan, Takashi Kato, Kan Akatsu, Robert D. Lorenz

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

30 Citations (Scopus)

Abstract

This paper presents a design approach for interior permanent magnet (IPM) machines with variable-flux characteristics using low coercive force magnet material for improved efficiency and extended operating speed range. A flux-intensifying interior permanent (FI-IPM) type having Ld > Lq is used in the design due to positive Id operation and reduced load Iq effects. Design consideration of machine structures and variable-flux machine attributes are discussed. In addition, leakage flux in a rotor is specially designed to obtain another degree-of-freedom in variable-flux control as well. Evaluation of the designed machine is provided using FEA simulations and experimental evaluation of a proof-of-principle prototype machine. The designed machine shows benefits in improving efficiency and extending the range of the torque-speed map when magnetization level of the low coercive force magnet is operated at the optimal levels.

Original languageEnglish
Title of host publication2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012
Pages3670-3677
Number of pages8
DOIs
Publication statusPublished - 2012 Dec 17
Event4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012 - Raleigh, NC, United States
Duration: 2012 Sep 152012 Sep 20

Publication series

Name2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012

Conference

Conference4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012
CountryUnited States
CityRaleigh, NC
Period12/9/1512/9/20

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Keywords

  • flux-intensifying
  • interior permanent magnet
  • low coercive force magnet
  • machine design
  • variable flux linkage

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

Limsuwan, N., Kato, T., Akatsu, K., & Lorenz, R. D. (2012). Design and evaluation of a variable-flux flux-intensifying interior permanent magnet machine. In 2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012 (pp. 3670-3677). [6342480] (2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012). https://doi.org/10.1109/ECCE.2012.6342480