Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Electrical and Structural Design of Air-conditioning Fan Motor for Noise Reduction

  • Han Hyung-Suk (Air-conditioning Technical Expert Group, System Appliance Division, Samsung Electronics) ;
  • Mo Jin-Yong (Air-conditioning Technical Expert Group, System Appliance Division, Samsung Electronics) ;
  • Kim Chang-Hyun (Air-conditioning Technical Expert Group, System Appliance Division, Samsung Electronics) ;
  • Lee Jae-Kwon (Air-conditioning Technical Expert Group, System Appliance Division, Samsung Electronics) ;
  • Jeong Weui-Bong (Department of Mechanical Engineering, Pusan National University)
  • Published : 2006.10.01
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Abstract

AC induction motors have been widely used for fan motor of the air conditioner indoor unit. Noise of these AC induction motors is usually caused by the coupling effects of structural and electrical systems. The rotating torque and the noise from AC induction motor were discussed in this paper,. First, the modification of motor was carried out in order to reduce the unbalance magneto motive force between main and sub winding. Second, structural modification based on normal mode analysis and modal testing was carried out so that the fan motor does not have the natural frequencies near the 2f-line frequency. Numerical modifications through these two processes were verified by experiments, which showed that the sound pressure level at 2f-line frequency of the modified system became about 25dB less than that of conventional one.

Keywords

References

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