Abstract
Active magnetic bearings (AMBs) play an important role in the helium turbine of High Temperature Gas-cooled Reactor (HTR). As one of the main components of the AMB, the displacement sensor influences the performance of the whole AMB system. In this paper, a new radial displacement sensor which characterized by high cost-efficiency, high accuracy, high sensitivity, and compact structure is discussed. Through establishing an equivalent model of the sensor, the theory of the sensor was derived. Then, a finite element model was constructed to analyze various factors that affect the sensor sensitivity and structure. Furthermore, an experimental platform was built to evaluate the sensor. As a result, the sensor exhibited an original sensitivity of 38.94 mV/µm, a good linearity of 1.87% and a low X-Y coupling degree of 2.14%. This sensor was applied to an AMB system and achieved stable suspension at a speed of 12 000 rpm. It is expected to be extended to HTR related applications due to its excellent performance.
This work was supported by National Natural Science Foundation of China (Grant No. 51775292).
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Notes
- 1.
The sensitivity in this paper is the initial sensitivity without any amplification.
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Xue, LX., Zhang, K., Xu, Y. (2018). Research on New Displacement Sensor Used in Active Magnetic Bearing Systems. In: Xu, Y., Gao, F., Chen, W., Liu, Z., Gu, P. (eds) Nuclear Power Plants: Innovative Technologies for Instrumentation and Control Systems. SICPNPP 2017. Lecture Notes in Electrical Engineering, vol 455. Springer, Singapore. https://doi.org/10.1007/978-981-10-7416-5_22
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DOI: https://doi.org/10.1007/978-981-10-7416-5_22
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