Title :
Rotor levitation by active magnetic bearing using digital state controller
Author :
Sabirin, Chip Rinaldi ; Binder, Andreas
Author_Institution :
Inst. for Electr. Energy Conversion, Darmstadt Univ. of Technol., Darmstadt
Abstract :
Active magnetic bearings (AMB) find extended application in high-speed rotating electrical machines due to the contact-free operation, which reduces the overall machine wear. Previous research on the control system for the AMB dealt mostly with PID controller, with its advantage of simple design. Improvements using faster control access to the plant can be realized by state-space control. Additionally, the magnetic bearing as a MIMO (multiple-input multiple-output) system can be better described by the state-space equations. A digital state controller is applied to levitate a rotor of a 40-kW 40000-rpm PM synchronous machine. Simulation and measurement results are given for zero speed operation at an AMB test-rig.
Keywords :
MIMO systems; digital control; machine control; magnetic bearings; magnetic levitation; permanent magnet machines; state-space methods; synchronous machines; three-term control; MIMO system; PID controller; PM synchronous machine; active magnetic bearing; contact-free operation; control system; digital state controller; high-speed rotating electrical machines; multiple-input multiple-output system; rotor levitation; state-space equations; Contacts; Control systems; Digital control; Equations; MIMO; Magnetic levitation; Synchronous machines; Testing; Three-term control; Velocity measurement; DSP; Magnetic bearings; optimal control; test bench;
Conference_Titel :
Power Electronics and Motion Control Conference, 2008. EPE-PEMC 2008. 13th
Conference_Location :
Poznan
Print_ISBN :
978-1-4244-1741-4
Electronic_ISBN :
978-1-4244-1742-1
DOI :
10.1109/EPEPEMC.2008.4635500
