Autonomous tuning method for realizing optimal adaptive voltage positioning scheme

Chih Wei Liu, Le Ren Chang-Chien

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, an autonomous tuning method is proposed to realize optimal adaptive voltage positioning (AVP) scheme for the buck converter. The optimal AVP scheme can perform linearly fast transient response with less output capacitors compared to the traditional buck converter. The conventional wisdom of realizing the optimal AVP is to make the current sensing resistor (R i) equal to the equivalent series resistor (Rc) of the output capacitor. However, such approach usually requires on-line system-identification algorithms or sensors that are complex and costly. Alternatively, this paper proposes a novel approach to implement the optimal AVP using a linear transition approximation (LTA) algorithm. Without using any parameter identification technique, the LTA algorithm only observes the output voltage response to adaptively adjust controller for realizing optimal linear transition during transient. The result of the proposed approach is very close to the effect of approximating Ri to Rc for an optimal AVP scheme. A buck converter using a FPGA controller that embeds the proposed algorithm is implemented. Experiment results show that the linear transient response is achieved in response to a 1-5 A step load change within 20μs. A comparative result also shows that the optimal AVP performance is superior to the case without using the proposed algorithm.

Original languageEnglish
Title of host publication2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2449-2452
Number of pages4
ISBN (Print)9781479934324
DOIs
Publication statusPublished - 2014 Jan 1
Event2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014 - Melbourne, VIC, Australia
Duration: 2014 Jun 12014 Jun 5

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)0271-4310

Other

Other2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014
CountryAustralia
CityMelbourne, VIC
Period14-06-0114-06-05

Fingerprint

Tuning
Electric potential
Approximation algorithms
Transient analysis
Resistors
Identification (control systems)
Capacitors
Controllers
Online systems
Field programmable gate arrays (FPGA)
Sensors
Experiments

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Liu, C. W., & Chang-Chien, L. R. (2014). Autonomous tuning method for realizing optimal adaptive voltage positioning scheme. In 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014 (pp. 2449-2452). [6865668] (Proceedings - IEEE International Symposium on Circuits and Systems). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISCAS.2014.6865668
Liu, Chih Wei ; Chang-Chien, Le Ren. / Autonomous tuning method for realizing optimal adaptive voltage positioning scheme. 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014. Institute of Electrical and Electronics Engineers Inc., 2014. pp. 2449-2452 (Proceedings - IEEE International Symposium on Circuits and Systems).
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Liu, CW & Chang-Chien, LR 2014, Autonomous tuning method for realizing optimal adaptive voltage positioning scheme. in 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014., 6865668, Proceedings - IEEE International Symposium on Circuits and Systems, Institute of Electrical and Electronics Engineers Inc., pp. 2449-2452, 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014, Melbourne, VIC, Australia, 14-06-01. https://doi.org/10.1109/ISCAS.2014.6865668

Autonomous tuning method for realizing optimal adaptive voltage positioning scheme. / Liu, Chih Wei; Chang-Chien, Le Ren.

2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014. Institute of Electrical and Electronics Engineers Inc., 2014. p. 2449-2452 6865668 (Proceedings - IEEE International Symposium on Circuits and Systems).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Liu CW, Chang-Chien LR. Autonomous tuning method for realizing optimal adaptive voltage positioning scheme. In 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014. Institute of Electrical and Electronics Engineers Inc. 2014. p. 2449-2452. 6865668. (Proceedings - IEEE International Symposium on Circuits and Systems). https://doi.org/10.1109/ISCAS.2014.6865668