ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Research on Displacement Sensor of High Temperature Active Magnetic Bearing
Received date: 2013-03-30
Revised date: 2013-07-04
Online published: 2013-07-16
Supported by
National Natural Science Foundation of China (51075200); Natural Science Foundation of Jiangsu Province (BK2011070)
The influence of high operating temperature on the differential transformer displacement sensor (DTDS) mechanism and characteristics and the following temperature compensation technology are mainly analyzed in view of the performance of DTDS and its application in high temperature active magnetic bearing (HTAMB). The technical problems of sensor sensitivity increase, temperature and time drift caused by the temperature rise are improved through the processing circuit of ratio mode and compensation resistance. The DTDS at high temperature is statically and dynamically calibrated and applied to a single degree-of-freedom (DOF) HTAMB system for static and dynamic simulation suspension. When the measurement range is -0.35-+0.35 mm with the working temperature 550 ℃, the DTDS has the following characteristics: sensitivity is 19.62 mV/μm, linearity is ±0.74%, hysteresis is ±0.40%, repeatability is ±0.97% and the cutoff frequency reaches 800 Hz. Finally, this DTDS is successfully used in a DOF HTAMB test bed. The results provide promotion for the HTAMB application in more-electric gas turbine engines system.
JIN Chaowu , XU Longxiang , ZHU Yili . Research on Displacement Sensor of High Temperature Active Magnetic Bearing[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(1) : 230 -239 . DOI: 10.7527/S1000-6893.2013.0331
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