Title :
Development of PWM power amplifier for active magnetic bearings
Author :
Cao, Guangzhong ; Lee, Chong-Won
Author_Institution :
Sch. of Eng. & Technol., Shenzhen Univ., China
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;
Conference_Titel :
Intelligent Control and Automation, 2004. WCICA 2004. Fifth World Congress on
Print_ISBN :
0-7803-8273-0
DOI :
10.1109/WCICA.2004.1343191
