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Design and Analysis of Surface-Mounted PM Motor of Compressor for Electric Vehicles Applications according to Slot/Pole Combinations

전기자동차 압축기용 표면부착형 영구자석 전동기의 극/슬롯수 조합에 따른 특성해석 및 설계

  • 최장영 (충남대학교 공과대학 전기공학과) ;
  • 박형일 (충남대학교 공과대학 전기공학과) ;
  • 장석명 (충남대학교 공과대학 전기공학과) ;
  • 이성호 (한국생산기술연구원)
  • Received : 2011.04.15
  • Accepted : 2011.09.16
  • Published : 2011.10.01

Abstract

This paper deals with design and analysis of surface-mounted PM (SPM) motor for compressor of air-conditioning system for electric vehicle applications according to slot/pole combination. First, required torque-speed curve characteristics are determined from operating conditions of the compressor. Restricted conditions such as motor size limit and current density are also determined. And then, under same rated and restricted conditions, twelve models which have different slot/pole combinations each other are designed for various pole arc/pitch ratio using simple equations and 2-d finite element (FE) analyses. Designed models are analyzed and compared in terms of back-emf THD, cogging torque, torque ripple, power losses, efficiency, etc. On the basis of analysis results, it is found that the motor with a 6-pole PM rotor and a 27-slot stator has most outstanding performances in electromagnetic aspects. Finally, through the mechanical modal analysis and demagnetization analysis, it is concluded that the determined motor is most suitable for the compressor of air-conditioning system for electric vehicles.

Acknowledgement

Supported by : 기초전력연구원

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