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http://dx.doi.org/10.5370/KIEE.2013.62.10.1397

Acoustic Noise Source Identification and Analysis of Dynamic Characteristics Parameters In BLDC Fan Motor  

Shin, Hyoun-Jeong (Dept. of Mechanical Engineering, Inha University)
Lee, En-Sang (Dept. of Mechanical Engineering, Inha University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.62, no.10, 2013 , pp. 1397-1402 More about this Journal
Abstract
This study researched cause of resonance noise for BLDC motor used in the refrigerator. it is difficult to measure dynamic characteristics for small sized fan & rotor system with conventional excitation method. Therefore this study performed electric exiting method and natural frequency method using microphone instead of conventional excitation and showed validity of these methods. Study result showed that tortional vibration frequency of fan & rotor system and natural bending frequency of the fan were matched with exciting frequency of BLDC motor caused by commutating ripple torque. And this frequency match caused resonance of the system. The study analyzed main parameters of this phenomenon and suggested alternative solution.
Keywords
Cogging Torque; Noise; Torsional Vibration; Motor; Fan; Refrigerator;
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  • Reference
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