Abstract
The object of this study is to develop a radial magnetic bearing which has nanometer rotational accuracy about a fixed center when rotating at high-speed. To achieve this objective, the vibration of the spindle caused by the unbalance force must be reduced. In this paper, we propose a method of control to reduce the vibration of the spindle. First, the center of inertia is estimated from measured coil currents and the rotational speed of the spindle. Subsequently, the references of the control system are modified on the basis of the estimated eccentricity, so that the spindle is constrained to rotate about the estimated center of inertia. Experimental results show that the spindle has a rotational accuracy of 13.2nm (3σ) at 2000min-1 and that the electromagnetic force synchronized with the rotation is 0.17N, which is 8.9% of the electromagnetic force when rotation is about the center of the profile.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
