Development of PWM power amplifier for active magnetic bearings

Author

Cao, Guangzhong ; Lee, Chong-Won

Author_Institution

Sch. of Eng. & Technol., Shenzhen Univ., China

Volume

4

fYear

2004

Firstpage

3475

Abstract

Power amplifier is an important element in active magnetic bearings (AMB), which generally require an efficient transconductance power amplifier having fairly broad bandwidth and high power capacity. The paper presents a practical design scheme for switching power amplifier for AMB. Based on mechatronics coupling theory, the influence of voltage and current of power amplifier on a rotor´s rotating speed and control accuracy is investigated. Considerations in the design are given. A PWM power amplifier based on IGBT power modules is developed and applied in an actual AMB system. Experimental results show the current switching capability of the power amplifier to be higher than 10 A, 48 V at 20 kHz.

Keywords

PWM power convertors; angular velocity control; insulated gate bipolar transistors; machine control; magnetic bearings; mechatronics; power amplifiers; switching circuits; IGBT power modules; PWM power amplifier; active magnetic bearings; mechatronics coupling theory; switching power amplifier; transconductance power amplifier; Bandwidth; High power amplifiers; Insulated gate bipolar transistors; Magnetic levitation; Mechatronics; Multichip modules; Power amplifiers; Pulse width modulation; Transconductance; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Control and Automation, 2004. WCICA 2004. Fifth World Congress on

Print_ISBN

0-7803-8273-0

Type

conf

DOI

10.1109/WCICA.2004.1343191

Filename

1343191