Title :
PWM control of a magnetic suspension system
Author :
Hurley, William Gerard ; Hynes, Martin ; Wölfle, Werner Hugo
Author_Institution :
Dept. of Electron. Eng., Nat. Univ. of Ireland, Galway, Ireland
fDate :
5/1/2004 12:00:00 AM
Abstract :
Magnetic levitation of a metallic sphere motivates and inspires students to investigate and understand the fundamental principles of electrical engineering, such as magnetic design, circuit design, and control theory. This paper describes the operation of a pulse width modulation converter in a magnetic suspension system. The pulse width-modulated (PWM) converter illustrates modern principles of power electronics, such as PWM control, current-mode control, averaged and linearized models of switched-mode converters, and power supply design. The reduced size of the heat sink in the switched-mode converter compared with its linear amplifier counterpart clearly illustrates improved efficiency. The experimental system described levitates a 6-cm-diameter, 0.8-kg metallic sphere.
Keywords :
PWM power convertors; control engineering education; electrical engineering computing; magnetic levitation; power electronics; student experiments; switched mode power supplies; 0.8 kg; 6 cm; PWM control; circuit design; control engineering education; control theory; current-mode control; electrical engineering; electromagnetics; heat sink; linear amplifier; magnetic design; magnetic levitation; magnetic suspension system; metallic sphere; power electronics; power supply design; pulsewidth modulation converter; switched-mode converter; switched-mode power supplies; Circuit synthesis; Control systems; Control theory; Electrical engineering; Magnetic levitation; Pulse amplifiers; Pulse width modulation; Pulse width modulation converters; Pulsed power supplies; Switching converters; Control engineering education; PWM; electromagnetics; magnetic levitation; pulsewidth modulation; switched-mode power supplies;
Journal_Title :
Education, IEEE Transactions on
DOI :
10.1109/TE.2004.827831
