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Journal of Mechanical Science and Technology

, Volume 20, Issue 10, pp 1653–1661 | Cite as

Electrical and structural design of air-conditioning fan motor for noise reduction

  • Hyung Suk Han
  • Jin Yong Mo
  • Chang Hyun Kim
  • Jae Kwon Lee
  • Weui Bong Jeong
Article
  • 341 Downloads

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 magnetomotive 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.

Key Words

2f-Line Frequency Resonance Induction Motor Magnetomotive Force Forced Vibration 

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Copyright information

© The Korean Society of Mechanical Engineers (KSME) 2006

Authors and Affiliations

  • Hyung Suk Han
    • 1
  • Jin Yong Mo
    • 1
  • Chang Hyun Kim
    • 1
  • Jae Kwon Lee
    • 1
  • Weui Bong Jeong
    • 2
  1. 1.Air-conditioning Technical Expert Group, System Appliance DivisionSamsung ElectronicsSuwonKorea
  2. 2.Department of Mechanical EngineeringPusan National UniversityPusanKorea

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