Title :
Modeling and implementation of sigma-delta modulation controller for DC/AC inverter
Author :
Hsieh, Guan-Chyun ; Chen, Hung-Liang ; Li, Jug-Chien
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Abstract :
A sigma-delta modulation controlled DC/AC inverter is proposed. Modeling and analysis of sigma-delta modulation (SDM) controller are explored. The pulse width of the SDM formed by cycle-by-cycle integration loop is clearly described. System stability is studied by root-locus and Bode plot techniques. An approach to reducing the THD is conducted by Fourier analysis. A prototype of 1 kVA SDM controlled DC/AC inverter is designed and examined. Simulation and experiment are close to the theoretical predictions. The proposed inverter can provide high efficiency up to 90% under the rated power and still keep the total harmonic distortion (THD) without EMI filter within 2%.
Keywords :
Bode diagrams; Fourier analysis; harmonic distortion; invertors; root loci; sigma-delta modulation; 1 kVA; Bode plot technique; DC-AC inverter; Fourier analysis; THD; cycle-by-cycle integration loop; root-locus; sigma-delta modulation controller; stability; total harmonic distortion; Delta modulation; Delta-sigma modulation; Frequency; Open loop systems; Power harmonic filters; Pulse amplifiers; Pulse width modulation; Pulse width modulation inverters; Stability; Switches;
Conference_Titel :
Industrial Electronics Society, 2004. IECON 2004. 30th Annual Conference of IEEE
Print_ISBN :
0-7803-8730-9
DOI :
10.1109/IECON.2004.1433276
