DocumentCode :
28213
Title :
Distortion Analysis and Duty Ratio Correction Algorithm for Asymmetric Modulation of Two-Stage Matrix Converter
Author :
Xianhui Qin ; Bo Zhou ; Jiadan Wei ; Jiaxing Lei ; Xiaoyu Liu ; Na Han
Author_Institution :
Jiangsu Key Lab. of New Energy Generation & Power Conversion, Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Volume :
62
Issue :
1
fYear :
2015
fDate :
Jan. 2015
Firstpage :
351
Lastpage :
362
Abstract :
When applying the two-stage matrix converter (TSMC) to the aero variable-speed constant-frequency generation system, the high input frequency varying between 360 and 800 Hz becomes a great challenge to its control. One of the most commonly used modulation methods for TSMC is the dual space vector modulation (DSVM). Simulation and experiments show that despite its advantages such as simplicity and low switching loss, the asymmetric DSVM causes distortion both in the output voltages and input currents of the TSMC. In this paper, the conception of “pulse orthocenter” (PO) is introduced via a BUCK model, and the influence of PO´s fluctuation upon the actual output is revealed. Based on the PO theory, the spectra of TSMC´s output voltages and input currents are then analyzed, indicating that asymmetric modulation causes $3nomega_{rm in}pm(3mpm 1)omega_{o}$ harmonics in the output voltages and $(3npm 1)omega_{rm in}$ harmonics in the input currents. In order to suppress these harmonics, a duty ratio correction (DRC) algorithm is proposed to improve the waveform quality without increasing switching loss. The DRC formula is provided and the available range of related parameters discussed. The correctness of distortion analysis is testified via simulation, and the validity and feasibility of the DRC algorithm is verified via experiments.
Keywords :
harmonics suppression; matrix convertors; power conversion harmonics; DRC algorithm; PO fluctuation; PO theory; TSMC asymmetric DSVM modulation; aero variable-speed constant-frequency generation system; distortion analysis; dual space vector modulation; duty ratio correction algorithm; frequency 360 Hz to 800 Hz; harmonics suppression; pulse orthocenter; switching loss; two-stage matrix converter buck model; Algorithm design and analysis; Frequency modulation; Harmonic analysis; Power conversion; Rectifiers; Vectors; Distortion analysis; duty ratio correction (DRC); two-stage matrix converter (TSMC); variable-speed constant frequency (VSCF);
fLanguage :
English
Journal_Title :
Industrial Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0046
Type :
jour
DOI :
10.1109/TIE.2014.2327567
Filename :
6823698
Link To Document :
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