Analysis and modeling of a switching power amplifier for magnetic bearing

Author

Wang, Jun ; Xu, Longxiang

Author_Institution

Coll. of Mech. & Electr. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

fYear

2009

fDate

25-27 May 2009

Firstpage

2257

Lastpage

2261

Abstract

A accurate system model of three-level switching power amplifier for magnetic bearing is presented. Based on the operating principle of three-level control, the math models of left-half bridge circuit and right-half bridge circuit were deduced by using equivalent switching model. The transfer function of closed-loop system was obtained by making some small disturbed signals near the DC steady-state operating point. The simulation results of this new system model are shown to be in excellent agreement with experimental results. The proposed system model is feasible and can guide to design the required parameters of the dynamic response.

Keywords

bridge circuits; magnetic bearings; power amplifiers; switching circuits; transfer functions; DC steady-state operating point; closed-loop system; dynamic response; equivalent switching model; left-half bridge circuit; magnetic bearing; right-half bridge circuit; three-level control; three-level switching power amplifier; transfer function; Bridge circuits; Circuit simulation; Magnetic analysis; Magnetic levitation; Magnetic switching; Power amplifiers; Power system modeling; Steady-state; Switching circuits; Transfer functions; equivalent switching model; magnetic bearing; switching power amplifier; three-level;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics and Applications, 2009. ICIEA 2009. 4th IEEE Conference on

Conference_Location

Xi´an

Print_ISBN

978-1-4244-2799-4

Electronic_ISBN

978-1-4244-2800-7

Type

conf

DOI

10.1109/ICIEA.2009.5138601

Filename

5138601