Research On Inductive Sensors In Magnetic Thrust Bearing

Displacement sensor is an important component of magnetic thrust bearing and its control system, and the merits of their performance largely affect the whole system performance. Compared to other types of sensors, inductive sensors have higher sensitivity, better linearity and repeatability, simpler structure, easier operation and maintenance, longer life and other advantages. Being applied into magnetic thrust bearing, it can improve the performance of the original control system, and further optimize the structure, save space and cost.The working principle and its basic components of inductive system is carried out, derives its relationship of linear output characteristic and displacement, which is applied to verify the feasibility of magnetic thrust bearing in theory, laid a theoretical foundation for the magnetic thrust bearing suspension control system design. Differential thrust bearing magnetic coil structure is similar to differential transformer displacement sensor coil structure. In this case, the mechanical part of the inductive sensor design provides reference and convenience. Since the mechanical structure is an important component magnetic thrust bearing part, which is reasonable and will directly affect the precision control precision bearings in structural design. In reference to conventional displacement sensors used in mechanical structures, this paper designs the mechanical structure of the relevant based on the requirements of the inductive displacement sensor.AD598, as a new line of single-chip signal conditioning system of differential transformer displacement of the chip, has huge advantages in the displacement detection circuit. Its powerful, high integration, input and output voltage and frequency to adapt to very wide range, can greatly external circuit to reduce space occupied by the sensor, and make the magnetic bearing and its control system to further optimize the structure and cost savings. This paper successfully applies it into magnetic thrust bearing displacement detection system, achieves the working principle and good experimental results, and obtains the theoretical basis and experimental protection for laboratory future research and development provides, so that magnetic thrust bearing system architecture is more streamlined and prospects much broader.