Driving magnetic bearing system based on intelligent material controllable shafting radial vibration

Abstract

The invention discloses a driving magnetic bearing system based on intelligent material controllable shafting radial vibration, and relates to the technical field of electromagnetism. The system comprises an outer shell, an intelligent material actuator, an iron core, a magnet exciting coil, a position sensor, a rotor, a vibration sensor, a signal acquiring module, a driving controller, a first power amplifier, a magnet exciting controller and a second power amplifier; an intelligent material is radially distributed in the shell, and are directly connected with the iron core; the magnet exciting coil is wound on the iron core; the position sensor is between the iron core and the rotor; the driving controller controls the shafting radial vibration and the rotor position; the first power amplifier drives the intelligent material actuator; the second power amplifier drives the magnet exciting coil; and the magnet exciting controller controls magnet exciting current. The position of the rotor is directly controlled through control of the displacement output of the intelligent material, so that the control mode is simple and reliable; and the vibration sensor is combined to effectivelycontrol the shafting radial vibration through the intelligent material actuator to reduce the impact on a base.

Description

technical field [0001] The invention relates to the field of electromagnetic technology, in particular to an active magnetic bearing system based on intelligent materials that can control the radial vibration of a shaft system. Background technique [0002] Magnetic bearings have the characteristics of no friction, no wear, and no lubrication. The rotor can rotate at high speed, and its speed is only limited by the strength of the rotor material. The power consumption and noise are extremely low, and it can be applied to a variety of complex application environments. Another outstanding advantage of magnetic bearings is that the operating state of the rotor can be detected by the control system in real time, the unbalance can be evaluated online and the unbalance can be actively controlled, so that the control of the rotor system can achieve high precision. [0003] At present, the reason why magnetic bearings are difficult to be applied in large-scale engineering is that du...

AI Technical Summary

Problems solved by technology

[0003] At present, the reason why magnetic bearings are difficult to be applied in large-scale engineering is that due to air gap, hysteresis and other reasons, the structure has local nonlinearity, which increases the difficulty of control and makes it difficult to achieve precise position control.

In addition, for naval ships, the radial vibration of the shaft system will excite the casing, causing the casing to vibrate and generate radiated sound, exposing its position and reducing its stealth performance

Images