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 Numerical Method

수치해석에 의한 고속팬용 밀폐구조형 BLDC모터의 열신뢰성 분석

  • Moon, Sun-Ae (Department of Mechanical Engineering, Graduate School of Hanyang Univ.) ;
  • Lee, Jae-Heon (Department of Mechanical Engineering, Hanyang Univ.)
  • 문선애 (한양대학교 대학원 기계공학과) ;
  • 이재헌 (한양대학교 공과대학 기계공학부)
  • Published : 2010.03.10
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Abstract

The thermal reliability of the closed-type BLDC motor for the high speed axial fans is analyzed by a numerical method in this paper. Since the module and the motor part are combined in a closed case, the heat generated from a rotor in the motor and the electronic components in the PCB module can not be effectively removed to the outside. Therefore the module will easily fail by high temperature. The accelerated-life testing was accomplished to formulate the life equation and numerical method is used to predict the inside temperature of the PCB module, which is one of the life equation parameter according to the environment. When the environment temperature of BLDC motor is 21, 35 and 50 $^{\circ}C$, the temperature in the PCB space is predicted as 73.4, 87.5 and 102.4 $^{\circ}C$. Then the life time with the temperature are calculated as 2,239, 863 and 328 hours.

Keywords

References

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