A switching controller for a magnetic bearing

Author

Steffani, Hans Friedrich ; Hofmann, Wilfried

Author_Institution

Dept. of Electr. Machines & Drives, Tech. Univ. Chemnitz, Germany

Volume

1

fYear

1997

fDate

9-14 Nov 1997

Firstpage

85

Abstract

This paper presents a sliding-mode controller for magnetic bearings. The experimental setup is a 72 kW, 250 kg induction motor for a turbo-fan. It is shown that such a controller, for which the output drives the switches directly, needs a lower switching-frequency than a conventional PD-position controller with an underlying PI-current-control and a pulse width modulation

Keywords

control system synthesis; electric current control; induction motors; machine bearings; magnetic devices; pulse width modulation; stability; switching; two-term control; variable structure systems; 250 kg; 72 kW; PI-current-control; current driven bearings; induction motor; levitating system stability; lower switching-frequency; magnetic bearing; pulse width modulation; sliding-mode controller; switching controller; turbo-fan; voltage driven bearings; Control systems; Current control; Induction motors; Magnetic levitation; Magnetic switching; Pulse width modulation; Sliding mode control; Space vector pulse width modulation; Switches; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, Control and Instrumentation, 1997. IECON 97. 23rd International Conference on

Conference_Location

New Orleans, LA

Print_ISBN

0-7803-3932-0

Type

conf

DOI

10.1109/IECON.1997.671026

Filename

671026