Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Design of Fault-Tolerant Inductive Position Sensor

고장 허용 유도형 위치 센서 설계

  • 백승국 (충남대학교 BK21 메카트로닉스사업단) ;
  • 박병철 (한국전력 연구원) ;
  • 노명규 (충남대학교 메카트로닉스공학)
  • Published : 2008.03.01
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Abstract

The position sensors used in a magnetic bearing system are desirable to provide some degree of fault-tolerance as the rotor position is necessary for the feedback control to overcome the open-loop instability. In this paper, we propose an inductive position sensor that can cope with a partial fault in the sensor. The sensor has multiple poles which can be combined to sense the in-plane motion of the rotor. When a high-frequency voltage signal drives each pole of the sensor, the resulting current in the sensor coil contains information regarding the rotor position. The signal processing circuit of the sensor extracts this position information. In this paper, we used the magnetic circuit model of the sensor that shows the analytical relationship between the sensor output and the rotor motion. The multi-polar structure of the sensor makes it possible to introduce redundancy which can be exploited for fault-tolerant operation. The proposed sensor is applied to a magnetically levitated turbo-molecular vacuum pump. Experimental results validate the fault-tolerance algorithm.

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References

  1. Chang, I. B. and Han, D. C., 1995, 'Performance of Built-in Capacitance Type Transducer of a Magnetic Bearing System,' J. KSME, Vol. 19, No. 9, pp. 2082-2088
  2. Maslen, E. H., Sortore, C. K., Gillies, G. T. and Williams, R. D. 1999, 'Fault Tolerant Magnetic Bearings,' J. Eng. Gas Turbine Power, Vol. 121, pp. 504-508 https://doi.org/10.1115/1.2818501
  3. Jeong, Y., Sul, S..K., Schulz, S. E. and Patel, N. R., January/February 2005, 'Fault Detection and Fault-Tolerant Control of Interior Permanent-Magnet Motor Drive System for Electric Vehicle,' IEEE Transactions on Industry Applications, Vol. 41, pp. 46-51 https://doi.org/10.1109/TIA.2004.840947
  4. Kral, C., Pirker, F. and Pascoli, G., May/June, 2005, 'Model-Based Detection of Rotor Faults Without Rotor Position Sensor . the Sensorless Vienna Monitoring Method,' IEEE Transactions on Industry Applications, Vol. 41, pp. 784-789 https://doi.org/10.1109/TIA.2005.847316
  5. Noh, M. D., Cho, S.-R., Kyung, J.-H., Ro, S.-K. and Park, J.-K., 2005, 'Design and Implementation of a Fault-Tolerant Magnetic Bearing System for Turbo-Molecular Vacuum Pump,' IEEE/ASME Transactions on Mechatronics, Vol. 10, pp. 626-631 https://doi.org/10.1109/TMECH.2005.859830
  6. Noh, M. D., Jeong, M. K., Park, B. C., Park, J. K., and Ro, S. K., 2002, 'Development of Low Cost Inductive Sensor Using Switching NoiseDemodulation,' in Proceedings of Eighth International Symposium on Magnetic Bearings, Mito, Japan
  7. Loesch, F., 2002, 'Detection and Correction of Actuator and Sensor Faults in Active Magnetic Bearing Systems,' in Proceedings of Eighth International Symposium on Magnetic Bearings, Mito, Japan
  8. Meeker, D. C., 2005, 'Optimal Solutions to the Inverse Problem in Quadratic Magnetic Actuator,' Ph. D. Thesis, The University of Virginia

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