A magnetic bearing displacement detection system based on winding inductance is designed to address the issues such as complex system structure caused by displacement sensor presence and system instability caused by sensor failures.Firstly

the edge effect of magnetic poles

hysteresis effect

and eddy current effect are all taken into account to improve the inductance model.Then

using characteristics that the inductance of each winding of the magnetic bearing contains rotor displacement information

the relationship between the winding current and the rotor displacement is established.A displacement detection system for the magnetic bearing is constructed using a nonlinear parameter estimation method.Finally

the effectiveness of the system is verified through simulation and experiments.The results show that the designed displacement detection system for the magnetic bearing has good displacement detection precision and can achieve stable operation of magnetic bearings under sensorless condition.