NDLI: Fully digital hysteresis modulation with switching time prediction

Content Provider	IEEE Xplore Digital Library
Author	Mattavelli, P. Stefanutti, W.
Copyright Year	2004
Description	Author affiliation: DIEGM, Udine Univ., Italy (Mattavelli, P.; Stefanutti, W.)
Abstract	This paper proposes a digital hysteresis modulation technique based on switching time prediction. Sampling controlled variables several times within a switching period, it ensures a dynamic performance comparable to that obtainable with an analog hysteresis modulation. Compared to conventional digital hysteresis modulation, it avoids frequency jitter since it predicts switching transitions. Compared to hysteresis modulation based on the detection of the zero-crossing of current errors, it avoids external analog circuits. Compared to PWM techniques, it ensures faster dynamic response. These advantages are obtained at the expense of an increased signal processing requirements and of control complexity. Switching frequency stabilization and synchronization with an external clock can be achieved extending the techniques proposed in the past for analog hysteresis modulations. The proposed predictive algorithm does not require knowledge of load parameters and only a rough estimation of the inductor filter, which can be easily self-adjusted. The proposed solution is suited for high-performance current (or sliding-mode) control where the digital hardware has enough computational power to allow multiple samples within a switching period. The proposed modulation technique has been applied to a sliding-mode control of a single-phase uninterruptible power supply (UPS). Experimental results confirm the effectiveness of the proposed approach.
Sponsorship	IEEE Power Sources Manufacturers Association PELS IEEE Industry Applications Soc
Starting Page	493
Ending Page	499
File Size	1512949
Page Count	7
File Format	PDF
ISBN	0780382692
DOI	10.1109/APEC.2004.1295853
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-02-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Hysteresis Digital modulation Pulse width modulation Signal processing algorithms Sliding mode control Uninterruptible power systems Sampling methods Frequency modulation Jitter Analog circuits
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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