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Vol. 175, Issue 7, July 2014, pp. 51-57




Rotorís Mass Unbalance Compensation Control on Bearingless Permanent Magnet Synchronous Motors
for Minimizing the Control Currents

1 Tao ZHANG, 1 Wei NI, 1 Xiaohui WANG, 1 Chen ZHANG, 2 Hongyun JIA

1 Faculty of electronic and Electrical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu 223005, China
2 School of information and control engineering, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China

1 E-mail: zhangtaohyit@126.com


Received: 4 May 2014 /Accepted: 30 June 2014 /Published: 31 July 2014

Digital Sensors and Sensor Sysstems


Abstract: The vibration originated from the rotorís unbalance mass impacts on the current oscillation. When the rotor rotating at high speed, power amplifier circuit will be burned down by excessive vibration control current, and at the same time the excessive control force will be generated. The vibrating force transfers to frame, which causes the system vibration and influence the dynamic properties and safe operation. So unbalance compensation on the rotating machine is necessary, especially for the high speed bearingless motor. Based on introductions of the rotor motion equation of bearingless permanent magnet synchronous motor (BPMSM) and analysis on generation mechanism of unbalance force, feed-forward compensation controller is designed on the technology of adaptive notch filter in this paper. The control system is simulated with Matlab/Simulink toolbox. The simulation results have shown that the current oscillation can be minimizing by the controller, and vibrating force is eliminated with the rotor rotating around inertia center.


Keywords: Bearingless motor, Bearingless permanent magnet motor, Suspended rotor, Compensation control, Mass unbalance.


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