Title :
IGBT power amplifiers for active magnetic bearings of high speed milling spindles
Author :
Zhang, Jing ; Karrer, Nicolas
Author_Institution :
Lab. of Electr. Eng. Design, Swiss Federal Inst. of Technol., Zurich, Switzerland
Abstract :
Active magnetic bearings used in high speed milling spindles require high dynamic performance and high reliability. In this paper, a new power amplifier using insulated gate bipolar transistors (IGBTs) is described. A three-level pulsewidth modulation (PWM) scheme and a dead-beat current controller are used to reduce the switching frequency and current harmonics. The experimental results with the newly developed IGBT amplifier show that the total power losses are obviously reduced without any negative influence on the dynamics of the control system
Keywords :
PWM power convertors; bipolar transistor switches; electric current control; insulated gate bipolar transistors; machining; magnetic devices; power amplifiers; power bipolar transistors; power semiconductor switches; power system harmonics; switching circuits; IGBT power amplifiers; active magnetic bearings; control system dynamics; current harmonics; dead-beat current controller; dynamic performance; high speed milling spindles; insulated gate bipolar transistors; power losses; reliability; switching frequency; three-level PWM scheme; Control systems; High power amplifiers; Insulated gate bipolar transistors; Magnetic levitation; Milling; Power amplifiers; Pulse amplifiers; Pulse width modulation; Space vector pulse width modulation; Switching frequency;
Conference_Titel :
Industrial Electronics, Control, and Instrumentation, 1995., Proceedings of the 1995 IEEE IECON 21st International Conference on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-3026-9
DOI :
10.1109/IECON.1995.483476
