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Thermal Reliability Analysis of BLDC Motor in a High Speed Axial Fan by Numerical Method  

Moon, Sun-Ae (Department of Mechanical Engineering, Graduate School of Hanyang Univ.)
Lee, Jae-Heon (Department of Mechanical Engineering, Hanyang Univ.)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.22, no.3, 2010 , pp. 130-138 More about this Journal
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
BLDC motor; Thermal reliability; Axial fan; Accelerated-life testing; Brushless DC motor;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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