Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Thermal Reliability Analysis of BLDC Motor in a High Speed Axial Fan by the Accelerated Life Test

가속수명시험에 의한 고속팬용 밀폐구조형 BLDC 모터의 열신뢰성 분석

  • Lee Tae-Gu (Department of Mechanical Engineering, Graduate School of Hanyang University) ;
  • Moon Jong-Sun (Department of Mechanical Engineering, Graduate School of Hanyang University) ;
  • Yoo Hoseon (Department of Mechanical Engineering, Soongsil University) ;
  • Lee Jae-Heon (Department of Mechanical Engineering, Hanyang University)
  • 이태구 (한양대학교 대학원 기계공학과) ;
  • 문종선 (한양대학교 대학원 기계공학과) ;
  • 유호선 (숭실대학교 기계공학과) ;
  • 이재헌 (한양대학교 공과대학 기계공학부)
  • Published : 2005.12.01
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Abstract

In this paper, thermal reliability of a closed type BLDC (Brushless DC) motor for high speed axial fan was analyzed by the accelerated life test. The closed type BLDC (Model No. MB1-8855-J01) motor was controlled by PCB module, which was composed of various electrical components. The failure of the closed type BLDC motor happened in PCB module due to high temperature. Failure mechanism of the closed type BLDC motor appears to be electrolyte dry out of capacitor. The accelerate life test was performed in temperature stress of $85^{\circ}C\;and\;105^{\circ}C$, respectively The failure data from the accelerated life test were analyzed and the life in each stress level was estimated with 960h and 261 h. At last, both life expression according to operating temperature of PCB module and life of the closed type BLBC motor in normal condition $(50^{\circ}C)$ were suggested.

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References

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