DocumentCode :
1194474
Title :
Nonlinear-controlled strategy for soft-switched series-resonant DC/AC inverter without auxiliary switches
Author :
Wang, Chien-Ming
Author_Institution :
Dept. of Electron. Eng., Lunghwa Univ. of Sci. & Technol., Taoyuan, Taiwan
Volume :
18
Issue :
3
fYear :
2003
fDate :
5/1/2003 12:00:00 AM
Firstpage :
764
Lastpage :
774
Abstract :
A nonlinear control for soft-switched series-resonant DC/AC inverter without auxiliary switches is presented. The inverter is configured by a full-bridge series-resonant inversion (FB-SRI) without cycloconversion and auxiliary switches. The inverter is a series resonator with four main switches to configure adaptively the output current suitable for impedance load. The output sinusoidal voltage is synthesized by a series of equal-amplitude quasisinusoidal pulses (QSPs) and the corresponding current is formed by unequal QSPs and adaptively phase-shifts to the impedance load. The nonlinear control strategy is designed against the input DC perturbation and achieves good dynamic regulation. The presented FB-SRI is operated by frequency modulation with a constant-on time control. Waveform syntheses for the output sinusoidal voltage and its current are clearly derived. A typical design example of a 500W FB-SRI inverter is examined to assess the system performance. The power efficiency is over 90% when the inverter output is above 200 W. The total harmonic distortions (THDs) for various impedance loads are all within 6%.
Keywords :
bridge circuits; control system synthesis; electric current control; invertors; nonlinear control systems; resonant power convertors; switching convertors; voltage control; 500 W; 90 percent; adaptive phase-shifting; dynamic regulation; equal-amplitude quasisinusoidal pulses; full-bridge series-resonant inversion; impedance load; nonlinear-controlled strategy; output current; output sinusoidal voltage; power efficiency; soft-switched series-resonant DC/AC inverter; total harmonic distortions; Circuits; Frequency modulation; Impedance; Nonlinear dynamical systems; Pulse width modulation inverters; Resonance; Switches; Total harmonic distortion; Voltage; Zero current switching;
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/TPEL.2003.810859
Filename :
1198055
Link To Document :
بازگشت