DocumentCode :
3013589
Title :
Power amplifier design in magnetic suspension system
Author :
Luo, Nina ; Wang, Lide
Author_Institution :
Dept. of Electr. Eng., Beijing Jiaotong Univ.
Volume :
3
fYear :
2005
fDate :
29-29 Sept. 2005
Firstpage :
2312
Abstract :
Magnetic suspension system is a typical nonlinear system, so the complexity of its control system design can be directly affected by the linearity and response time of every unit in the system, so as the power unit. A method of forming a linear current source controlled by voltage is presented in this paper, with an H-type bridge chopper as its major circuit. It makes use of the pulse width modulation characteristic of voltage-drive modulator TL494, and the bootstrap function of IR2110, generates MOSFET drive pulse signals whose duty cycle can be adjusted, so that the output current value can be changed. Frequency band is broadened and response speed is improved by improving the compensation part of the system. The experiments have indicated that this power circuit has a good linearity. It has not only the simple and stable characteristics but also good performances and practical characteristics
Keywords :
MOSFET; bootstrap circuits; bridge circuits; choppers (circuits); design engineering; electric current control; nonlinear systems; power amplifiers; pulse width modulation; voltage control; H-type bridge chopper; IR2110; MOSFET; TL494; bootstrap function; control system design; linear current source; magnetic suspension system; nonlinear system; power amplifier; power circuit; pulse width modulation; voltage-drive modulator; Circuits; Control systems; Delay; Linearity; Magnetic levitation; Nonlinear control systems; Nonlinear systems; Power amplifiers; Pulse width modulation; Space vector pulse width modulation; H-type bridge chopper; Magnetic suspension system; feedback compensation.; pulse width modulation;
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.2005.202982
Filename :
1575179
Link To Document :
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