The sensor is an important part of the active magnetic bearing system, which directly affects the performance of the entire system. Compared with the eddy current sensor, inductive sensor has the advantages of low cost, high sensitivity, and is not sensitive to the electromagnetic environment; Influenced by the ambient temperature is small. In this paper, design research from two aspects of the sensor structure and circuit, and the sensor was simulation analysis, which laid the foundation in the application of magnetic bearing systems.
In an active magnetic bearing (AMB) system, the Auxiliary bearings (ABs) are indispensable to protect the
rotor and stator in case of AMB failure. Most of the former researches try to modify relevant design parameters of ABs to
buffer the following impacts and heating after rotor drop. Based on the analysis of the disadvantages of traditional ABs, a
new type of AB with the support of metal rubber ring is proposed to enhance the AB work performance in AMB system.
Detailed simulation models containing rigid rotor model, contact model between rotor and inner race as well as AB
system model after rotor drop are established. Then, using those established models the dynamic responses are simulated
to obtain proper metal rubber ring support characteristics. Finally, relevant rotor drop experiments are carried out on the
established AMB test bench. The experiment results verify the advantages of the new type ABs and the correctness of
simulation analysis.
Dynamic Responses of Rotor Drops onto Auxiliary Bearing with the Support of Metal Rubber Ring