The Transactions of the Korean Institute of Electrical Engineers B (대한전기학회논문지:전기기기및에너지변환시스템부문B)

The Korean Institute of Electrical Engineers (대한전기학회)
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Dynamic Behavior Analysis of an Eccentric Rotor with Unbalanced Magnetic Forces in BLDC Motors

BLDC 전동기의 전자기적 불평형력을 고려한 편심 회전자의 동적 거동 해석

  • 김태종 (부산대 기계공학부 및 기계기술연구소) ;
  • 황상문 (부산대 기계공학부 및 기계기술연구소) ;
  • 박노길 (부산대 기계공학부 및 기계기술연구소)
  • Published : 1999.11.01
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Abstract

Vibration of a rotor-bearing system driven by an electric motor is a coupled phenomenon between mechanical characteristics and magnetic origins through the air-gap. With the advent of new high-energy magnets together with high precision motor applications, magnetic sources of vibration are becoming more serious. This paper investigates the transient whirl responses of a rotor system with purely mechanical origins and compares it with that of magnetically coupled origins. A perturbation method is applied to model the magnetic field associated with rotor eccentricity. Electromagnetic forces are obtained by the Maxwell stress method, which utilizes the analytical expression of radial flux density distribution. The FEM was applied to a rotor-motor system to illustrate magnetically coupled effects in rotor dynamics. Results show that magnetically coupled sources significantly affect the vibration of the rotor-motor system.

Keywords

References

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