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Stability Analysis of Luenberger Observers for Speed Sensorless High Performance Spindle Drives
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| Author(s) |
F. Profumo; G. Griva; A. Tenconi; M. Abrate; L. Ferraris |
| Abstract |
One of the issues still open in sensorless high performance spindle drives and gearless traction drives is the possibility to obtain a wide speed range, from almost zero speed to several thousands rpm. This paper presents a comparison of results for sensorless induction motor drives using the Luenberger observer for flux and speed estimation in the cases of typical implementations and of a new implementation. The new proposed method is based on different values of the discrete observer matrix, computed off-line at different speeds in order to keep the poles inside the stability region. As the motor speed changes, the proper observer matrix is selected by the control system: the dynamic response and the stability of the observer are guaranteed at high speed as well as at low speed. The stability of the proposed method has been compared with the stability of other implementations. The performance of a 4-pole induction motor drive, using the proposed observer, has been tested both in simulation and experimentally and the results obtained in the range 20+12000 rpm are compared with the results obtained for the most used implementation method. |
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| Filename: | EPE1999 - PP00604 - Profumo.pdf |
| Filesize: | 933.6 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-04-07 by System |
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