UPS inverter design using discrete-time sliding-mode control scheme
Tsang-Li Tai
Jian-Shiang Chen
Dept. of Power Mech. Eng., Nat. Tsing Hua Univ., Hsinchu;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Feb 2002
Volume: 49,
Issue: 1
On page(s): 67-75
ISSN: 0278-0046
References Cited: 14
CODEN: ITIED6
INSPEC Accession Number: 7177964
Digital Object Identifier: 10.1109/41.982250
Current Version Published: 2002-08-07
Abstract
This paper presents a novel discrete-time sliding-mode control
algorithm for an uninterruptible power supply (UPS) inverter design. The
approach offers a dual-loop design, in which a current predictor
utilizes the tracking error of output voltage to estimate the desired
inductor current, while a current controller is adopted to regulate the
inductor current and, thus, produces a control command to the pulsewidth
modulation inverter. An explicit condition for stable controller design
is derived. The efficacy of this scheme is validated via a successful
implementation on a digital-signal-processor-based UPS inverter. The
proposed scheme has shown its robustness on low output voltage
distortion, excellent voltage regulation, and it is insensitive to load
variation, even under nonlinear loads. Experimental studies were
performed to further validate the effectiveness of this scheme
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