A PWM Based Switching Power Amplifier for Active Magnetic Bearings

Author

Changsheng, Zhu ; Zhiwei, Mao

Author_Institution

Dept. of Electr. Eng., Zhejiang Univ., Hangzhou

Volume

2

fYear

2005

fDate

29-29 Sept. 2005

Firstpage

1563

Lastpage

1568

Abstract

A two-level PWM based switching power amplifier for active magnetic bearings with current-loop, which can be used in either voltage-controlled mode or current-controlled mode, was proposed, designed and debugged in this paper. The characteristics of the switching power amplifier with the maximum output current 8 A, such as the static input-output characteristic, frequency response characteristics and current harmonic distortion, were measured. The power amplifier was successfully used to suspend a rotor system. It is shown the proposed two-level PWM switching power amplifier can meet the requirements of the amplifiers of industrial active magnetic bearings

Keywords

electric current control; frequency response; harmonic distortion; magnetic bearings; power amplifiers; pulse width modulation; rotors; switching circuits; voltage control; PWM switching power amplifier; current-controlled mode; frequency response characteristics; harmonic distortion; industrial active magnetic bearings; rotor system; static input-output characteristics; voltage-controlled mode; Current measurement; Distortion measurement; Frequency response; Harmonic distortion; Magnetic levitation; Magnetic switching; Power amplifiers; Power measurement; Pulse width modulation; Voltage; PWM; active magnetic bearing; switching power amplifier;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2005. ICEMS 2005. Proceedings of the Eighth International Conference on

Conference_Location

Nanjing

Print_ISBN

7-5062-7407-8

Type

conf

DOI

10.1109/ICEMS.2005.202812

Filename

1638050