Efficiency contours and loss minimization over a driving cycle of a variable-flux flux-intensifying interior permanent magnet machine

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

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

25 Citations (Scopus)

Abstract

In this paper, experimental evaluations for the efficiency of a novel interior permanent magnet (IPM) machine with variable-flux characteristics using low coercive force magnets is presented. The variable-flux characteristics allow improving the efficiency of machine and also reducing the usage of rare-earth material in the high-coercive magnets, which are currently used for the IPM machines in electrified vehicles. A flux-intensifying interior permanent magnet (FI-IPM) type having positive saliency is employed for a positive d-axis current to mitigate a demagnetizing field in the magnet due to a q-axis current. A proof-of-principle machine is designed, fabricated and evaluated. A series of experiments are conducted to capture the efficiency contours with different magnetization states of the low coercive force magnets. The designed machine shows benefits in improving efficiency when the magnetization state is optimally operated. With these results, the loss over a driving cycle is then simulated and the benefits of changing the magnetization state are quantified.

Original languageEnglish
Title of host publication2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013
Pages591-597
Number of pages7
DOIs
Publication statusPublished - 2013 Dec 31
Event5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013 - Denver, CO, United States
Duration: 2013 Sep 152013 Sep 19

Publication series

Name2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013

Conference

Conference5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013
CountryUnited States
CityDenver, CO
Period13/9/1513/9/19

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology

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  • Cite this

    Fukushige, T., Limsuwan, N., Kato, T., Akatsu, K., & Lorenz, R. D. (2013). Efficiency contours and loss minimization over a driving cycle of a variable-flux flux-intensifying interior permanent magnet machine. In 2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013 (pp. 591-597). [6646755] (2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013). https://doi.org/10.1109/ECCE.2013.6646755