A hybrid computational tool to analyze the performance of electric machines with reduced content of permanent magnet

R. M. Ram Kumar, Muhammad Raza Khowja, Gaurang Vakil, David Gerada, Chris Gerada, Krzysztof Paciura, B. G. Fernandes

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

Electric vehicles (EVs) are equipped with interior permanent magnet (IPM) or permanent magnet assisted synchronous reluctance (PM-SynRel) machines because of their superior performance in field weakening region. The effect of saturation is more pronounced in these machines. This prohibits the use of simple analytical tools utilizing constant machine parameters for d and q axis inductance (mathrmL_mathrmd and mathrmL_mathrmq) from accurately predicting control variables like current advance angle, terminal voltage, torque, etc. As a result, design and optimization of IPM and PM-SynRel machines are constrained to time consuming transient finite element analysis (FEA) performed at rated operating point. A hybrid method is introduced in this paper to estimate the complete torque speed characteristics of IPM and PM-SynRel machines. The hybrid method works by employing simple analytical formulation alongside static FEA, thereby, reducing the computational time by more than 10 times. This enables optimization of electric machines considering complete torque speed characteristics with reduced computational burden. In addition, the accuracy of hybrid method utilizing static FEA is found to be on par with complete transient FEA analysis.

Original languageEnglish
Title of host publication2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages340-345
Number of pages6
ISBN (Electronic)9781728146294
DOIs
Publication statusPublished - Jun 2020
Externally publishedYes
Event2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020 - Chicago, United States
Duration: 23 Jun 202026 Jun 2020

Publication series

Name2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020

Conference

Conference2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020
Country/TerritoryUnited States
CityChicago
Period23/06/2026/06/20

Keywords

  • IPM
  • PM-SynRel
  • reduced PM and Static FEA

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Automotive Engineering
  • Transportation

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