Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Analysis of the Acoustic Noise Characteristics by Controlling Lead Angle in Brushless DC Motors

진상각 제어에 따른 BLDC 전동기의 소음 특성 해석

  • 황상문 (부산대학교 기계공학부 및 기계기술 연구소) ;
  • 김경태 (부산대학교 기계설계대학원 석사과) ;
  • 정승규 (LG전자(주) 리빙시스템연구소)
  • Published : 2000.01.01
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Abstract

Mutual torque ripple in a brushless DC motor is the main source of acoustic noise, especially fur motor operation with high speed and torque. This paper presents a method to obtain mutual torque ripple to identify acoustic noise source. Mutual torque ripple can be determined by analyzing phase current shape and magnetic circuit with different lead angles. Current shape is determined by state space model of voltage equation with the use of inductance calculated by FEM, and confirmed by experimental results. Mutual torque ripple is also determined by FEM analysis for the calculated current shape. Acoustic noise experiment reveals that mutual torque ripple with different lead angle is one of the main sources for noise generation in a brushless DC motor.

Keywords

References

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