Roll motion control of a mover in bearingless linear motor by using one-sided active magnetic bearings
- Roll motion control of a mover in bearingless linear motor by using one-sided active magnetic bearings
- 김우연; 이종민; 김승종
- bearingless linear motor; active magnetic bearing; magnetic levitation; roll motion; 베어링리스 리니어 모터; 능동자기베어링; 자기부상; 롤 운동
- Issue Date
- VOL 19, NO 11, 1184-1191
- A bearingless linear motor(BLLM) which consists of two stators and a common mover is able to
levitate and move its mover without any linear bearing or even additive windings. In the previous study,
BLLM was actively controlled on the translation and pitch motion, while the roll motion is passively
stable. In order to control the roll motion, this paper suggests adding active magnetic bearings(AMBs) at
bottom of the mover in BLLM. The AMBs control the roll motion and also partially supports the weight
of the mover. In this paper, magnetic forces generated by the AMBs are estimated by using an FEM
model. Based on the analysis results, the bias current of the AMBs is determined and a PD controller is
designed. Through an experimental levitation test, it was verified that roll motion is well controlled by
AMB during levitation.
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