DocumentCode :
1615435
Title :
A variable band universal flux/charge modulator for VSI and CSI modulation
Author :
Loh, P.C. ; Holmes, D.G.
Author_Institution :
Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Clayton, Vic., Australia
Volume :
2
fYear :
2001
Firstpage :
999
Abstract :
This paper presents an integrated approach to the closed-loop control of output voltage for a voltage source inverter and output current for a current source inverter, using hysteresis with a rectangular bounding box in the synchronous d-q reference frame, and a simple set of switching rules. The modulator is constrained to only select from the two nearest active space vectors to the target reference, and hence achieves a significantly improved harmonic performance compared to sigma-delta and other stationary frame hysteresis modulators. A further refinement then adjusts the dimensions of the bounding box to restrict the switching process to two active space vectors (and null vectors) only within a constant switching period. This achieves a harmonic performance similar to open loop space vector modulation. Also, since the modulator is a closed loop system, it exhibits excellent robustness to parameter variations and other system disturbances. The performance and practicability of the modulator have been verified both in simulation and experimentally.
Keywords :
closed loop systems; electric current control; invertors; power conversion harmonics; switching circuits; voltage control; CSI modulation; VSI modulation; active space vectors; closed loop system; closed-loop control; constant switching period; current source inverter; harmonic performance; harmonic performance improvement; hysteresis; null vectors; open loop space vector modulation; output current control; output voltage control; rectangular bounding box; switching process restriction; switching rules; synchronous d-q reference frame; target reference; variable band universal flux/charge modulator; voltage source inverter; Delta modulation; Frequency; Hysteresis; Power harmonic filters; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Spectral analysis; Support vector machines; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Conference, 2001. Thirty-Sixth IAS Annual Meeting. Conference Record of the 2001 IEEE
Conference_Location :
Chicago, IL, USA
ISSN :
0197-2618
Print_ISBN :
0-7803-7114-3
Type :
conf
DOI :
10.1109/IAS.2001.955578
Filename :
955578
Link To Document :
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