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영구자석 오버행에 의한 BLDC Motor의 전자기적 현상 및 진동특성 해석
姜圭洪(Gyu-Hong Kang),金德縣(Duck-Hyun Kim),金奎卓(Gyu-Tak Kim) 대한전기학회 2006 전기학회논문지 B Vol.55 No.11
In this paper, the estimation of Z-axis thrust ripple and vibration of BLDC motor with asymmetrical permanent magnet overhang is performed by 3-D Finite Element Method (3-D FEM) and vibration experimentation. The ripple of Z-axis thrust is due to armature reaction field in BLDC motor driven to squire wave. That is generating to Z-axis vibration. The analysis results of Z-axis thrust and the vibration by Z-axis thrust ripple is validated by comparison with experimental result.
로봇 구동용 BLDC Motor의 영구자석 오버행에 따른 토크 및 진동ㆍ소음 특성
姜圭洪(Gyu-Hong Kang),金德顯(Duck-Hyun Kim) 대한전기학회 2006 전기학회논문지 B Vol.55 No.7
In Brushless DC Motor, there are Permanent Magnets (PMs) with driving circuit and sensor for detecting to rotor position and rotation speed. In the case of using hall IC sensor which response to magnetic flux, that is required to additional sensor magnet for rotor position detecting. Most of BLDC motor, However, take asymmetrical overhang of PM in rotor instead of additional sensor magnet for operating of hall IC sensor. The asymmetrical overhang of PM occur rotor thrust to z-axis direction that is lead to not only damage of bearing but also intensive noise and vibration. Therefore, the analysis of magnet overhang effect in the side of vibration and drive to hall IC sensor is required to precise. In this paper, 2-D Finite Element Method is used to solve precise field computation and thrust of z-axis direction considering asymmetrical magnet overhang. And also the z-axis thrust from the analysis result is compared to experimental result. In conclusion, the purpose of this paper minimize to noise and vibration of BLDC Motor as analyzes to asymmetrical magnet overhang effect.
50,000rpm급 초고속 소형 정밀모터용 능동 자기베어링 시스템 제어 및 설계
姜圭洪(Gyu-Hong Kang) 대한전기학회 2006 전기학회논문지 B Vol.55 No.8
This paper deal with control and design of 50,000rpm class Active Magnetic Bearing(AMB) system for high speed precision motor. In the design of AMB system, the design parameters adopted high robust rotor shaft, Active Magnetic Bearing, sensor and control system. In the design of Magnetic Bearing, 2-D Finite Element Method(FEM) is used and transfer matrix method is using for rotor dynamics. The control accuracy of high speed AMB system is demonstrated by experimentations.