Control Strategies and Performance Optimization of Active Magnetic Bearing System

Abstract

newline An active magnetic bearing (AMB) is a type of bearing that uses magnetic fields to support newlinea rotating shaft or other moving parts without physical contact. It is an advanced technology newlinethat offers several advantages over conventional bearings, including high speed, high newlineprecision, low friction, and low maintenance requirements. The operation of an AMB newlineinvolves the use of electromagnets to generate magnetic fields that suspend the rotor or other newlinemoving part in the air gap between the stator and rotor. The magnetic fields are controlled newlineusing sensors and a feedback system that monitors the position and movement of the rotor newlineand adjusts the magnetic fields to maintain stability and control. One of the key benefits of newlinean AMB is its ability to operate at high speeds, making it ideal for use in applications such newlineas turbines, compressors, and other high-speed rotating machinery. Because there is no newlinephysical contact between the rotor and stator, there is no friction or wear, which leads to newlinereduced maintenance requirements and longer service life. Another advantage of AMBs is newlinetheir ability to provide precise control over the position and movement of the rotor or other newlinemoving part. This makes them well-suited for applications that require high levels of newlineaccuracy and precision, such as semiconductor manufacturing, medical equipment, and newlineaerospace. newlineHowever, there are also some challenges associated with the use of AMBs. One of the newlineprimary challenges is the control of the magnetic fields, which requires sophisticated control newlinealgorithms and feedback systems. To tackle these challenges, a linearized transfer function newlineis mathematically derived with the help of physical parameters of fabricated AMB hardware newlinemodel. this derived transfer function is of second order and open loop unstable. Therefore, a newlineclosed loop is proposed which consists power amplifier, controller and sensor. In this thesis, newlinedifferent types of controllers are used to control the proposed AMB system. Started with the newlinevery basic type of classical con