The Influence of Metal Layer on the Differential Transformer Displacement Sensor
For some special active magnetic bearings (AMBs) application occasions that demand the rotor isolated from external environment,especially when a metal layer is added,other sensors besides differential transformer displacement sensor (DTDS) can not used to detect the rotor displacements.Before being used,the impact factors and relevant extents on the DTDS performances are analyzed on the basis of magnetic and electrical properties the added metal layer between the DTDS core and the measured object.The DTDS performance with and without metal layers are separately simulated on the platform of MATLAB and ANSOFT.And then the DTDS with metal layers are applied to a five-DOF AMB test bed.The research results show that the sensor sensitivity has decreased 8.18% and cutoff frequency decreased 5%,while the linearity increased 38.7%.Despite of those changes,the rotor can also be stably suspended and rotated at 30 000r/min in the five-DOF AMB system.
differential transformer metal layer displacement sensor active magnetic bearings
Chaowu Jin Longxiang Xu Qiuping Fan Yili Zhu
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics andAstronautics, Nanjing 210016, China
国际会议
台湾
英文
3594-3601
2011-12-11（万方平台首次上网日期，不代表论文的发表时间）