Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Heat Treatment of Stator Core for Reduction of DC-Bias of Cogging Torque

코깅토크 DC성분 저감을 위한 모터 철심 열처리

  • Ha, Kyung-Ho (Electrical Steel Research Group, Technical Laboratory, POSCO) ;
  • Kim, Ji-Hyun (Electrical Steel Research Group, Technical Laboratory, POSCO) ;
  • Kwon, Oh-Yeoul (Electrical Steel Research Group, Technical Laboratory, POSCO) ;
  • Kim, Jae-Kwan (Electrical Steel Research Group, Technical Laboratory, POSCO) ;
  • Lim, Yang-Su (Electrical Steel Development Sales Team, POSCO)
  • 하경호 (포스코 기술연구소 전기강판연그룹) ;
  • 김지현 (포스코 기술연구소 전기강판연그룹) ;
  • 권오열 (포스코 기술연구소 전기강판연그룹) ;
  • 김재관 (포스코 기술연구소 전기강판연그룹) ;
  • 임양수 (포스코 전기강판 개발판매팀)
  • Published : 2008.07.16
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Abstract

This paper deals with the reduction of DC component of cogging toruqe by using the heat treatment of the stator core. The stator core is made of electrical steel sheared by the punching die. From the punching process, large mechanical stress at the edge of stator tooth induces significant plastic and elastic deformation and influences magnetic properties. Then, these phenomenon in the sheared region has influence on the magnetic unbalance in the air-gap of motor. This paper investigated the effect of the punching process on the magnetization process and the mechanical deformation and proposed the stress relief annealing method for the reduction of friction torque among one of motor characteristics.

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