Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Characteristic of Noise and Vibration in 3-phase Induction Motor for the Forklift

전동 지게차용 3상 유도 모터의 소음 진동 특성에 대한 연구

  • 김우형 (한양대학교 일반대학원 기계공학과) ;
  • 정진태 (한양대학교 일반대학원 기계공학과)
  • Published : 2009.01.20
Download PDF
⟨ Previous Next ⟩

Abstract

This paper presents the reduction of acoustic noise generated by electromagnetic force in an induction motor of the electrical forklift. After summarizing the electromagnetic excitation forces due to the interaction between the stator/rotor slot permeance and the stator winding magnetomotive force, the effects of the electromagnetic force on the noise and vibration of an induction motor are analyzed. In order to experimentally identify the noise sources of the motor, the signal analyses for noise and vibration are performed by using waterfall plots of noise and vibration spectrums. It is found that severe noise and vibration are caused by the electromagnetic force when the mode number of the excitation shape for a stator is low. Furthermore, it is verified that the motor noise is amplified if the excitation frequency of the electromagnetic force coincides with one of the natural frequencies of the stator. It is experimentally demonstrated that this severe noise can be considerably reduced by structure modifications. Finally, some design guidelines are suggested to develop an induction motor with a low level of noise.

Keywords

References

  1. Kim, W. H., Hong, I. H. and Chung, J. T., 2008, “A Study on Noise Reduction for the Driving System of a Forklift,” Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 18, No. 1, pp. 80-86 https://doi.org/10.5050/KSNVN.2008.18.1.080
  2. Nau, S. L. and Mello, H. G. G., 2000, “Acoustic Noise in Induction Motors : Causes and Solutions,” IEEE, pp. 253-263
  3. Finely, W. R., 1991, “Noise in Induction Motors-cause and Treatments,” IEEE, Vol. 27, No. 6, pp. 1204-1213 https://doi.org/10.1109/28.108474
  4. Song, J. S. and Kim, K. J., 2000, “Analysis on Noise of Automotive Alternator Considering the Number of Stator Slots,” Journal of the KSME, Vol. 24, No. 1, pp. 126-133
  5. Chung, J. T., Suh S. J. and Eun H. J., 1989, “Identification of Noise Characteristics of an Automobile Alternator,” Journal of the KSME, Vol. 13, No. 1, pp. 40-47
  6. Yang, S. J., 1981, “Low-noise Electrical Motors,” Clarendon Press, Oxford, pp.15-48
  7. Timar, P. L., 1989, “Noise and Vibration of Electrical Machines,” Elsevier, Amsterdam, pp. 27-87, pp. 105-113