A three-phase permanent magnet brushless DC motor for low-power low-speed fan applications -optimizing cost and efficiency

Ranjan Kumar Gupta, Ned Mohan

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

6 Scopus citations

Abstract

In this paper, a three-phase permanent-magnet brushless-DC motor is described with three-times the measured efficiency in the same frame size as compared to fan motors of conventional designs. The Finite Element (FE) analysis is performed to compare bonded NdFeB, ferrite and hybrid permanent magnets to optimize the cost and efficiency of the motor. Experimental results on a laboratory prototype verify the simulations. A novel design optimization procedure using Halbach magnetization is proposed to further increase the efficiency by shaping the back-EMF waveform. Based on FE analysis, efficiency gains of using Halbach-magnetization, in combination with 120-degree and 180-degree phase-current-conduction motors are compared.

Original languageEnglish (US)
Title of host publicationConference Record of the 2007 IEEE Industry Applications Conference 42nd Annual Meeting, IAS
Pages846-852
Number of pages7
DOIs
StatePublished - 2007
Event2007 IEEE Industry Applications Conference 42nd Annual Meeting, IAS - New Orleans, LA, United States
Duration: Sep 23 2007Sep 27 2007

Publication series

NameConference Record - IAS Annual Meeting (IEEE Industry Applications Society)
ISSN (Print)0197-2618

Other

Other2007 IEEE Industry Applications Conference 42nd Annual Meeting, IAS
CountryUnited States
CityNew Orleans, LA
Period9/23/079/27/07

Keywords

  • BLDC
  • Efficiency, fan motors
  • Halbach

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