Decentralized Interleaving of Parallel-connected Buck Converters

Mohit Sinha; Jason Poon; Brian B. Johnson; Miguel Rodriguez; Sairaj V. Dhople

doi:10.1109/TPEL.2018.2868756

Decentralized Interleaving of Parallel-connected Buck Converters

Mohit Sinha, Jason Poon, Brian B. Johnson, Miguel Rodriguez, Sairaj V. Dhople

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

We present a decentralized control strategy that yields switch interleaving for parallel-connected dc-dc buck converters. Compared to state-of-the-art methods that are distributed at best, the proposed architecture requires no communication, and hence, presents a variety of advantages with regard to reliability, modularity, and cost. The method is based on the digital implementation of the dynamics of a Liénard-type oscillator circuit as the controller for the converters. Each controller only requires the locally measured output current to synthesize the pulsewidth modulation (PWM) carrier waveform. The intrinsic electrical coupling between converters drives the nonlinear-oscillator-based controllers to converge to an interleaved state with uniform phase spacing across PWM carriers, independent of the number of converters, the load, and initial conditions. We provide analytical guarantees for existence and stability of the interleaved state as well as extensive hardware results for a system of five 120 W 48 V-to-12 V dc-dc buck converters that demonstrate convergence to the interleaved state in the face of a variety of large-signal disturbances.

Original language	English (US)
Article number	8454505
Pages (from-to)	4993-5006
Number of pages	14
Journal	IEEE Transactions on Power Electronics
Volume	34
Issue number	5
DOIs	https://doi.org/10.1109/TPEL.2018.2868756
State	Published - May 2019

Bibliographical note

Funding Information:
Dr. Johnson was a recipient of the National Science Foundation Graduate Research Fellowship in 2010. He is an Associate Editor for the IEEE TRANS-ACTIONS ON ENERGY CONVERSION.

Funding Information:
Manuscript received May 4, 2018; revised July 22, 2018; accepted August 20, 2018. Date of publication September 3, 2018; date of current version March 29, 2019. This work was supported in part by the U.S. Department of Energy Solar Energy Technologies Office under Contract DE-EE0000-1583 and in part by the National Science Foundation under Grant ECCS-1509277. Recommended for publication by Associate Editor W. Huang. (Corresponding author: Sairaj V. Dhople.) M. Sinha and S. V. Dhople are with the Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA (e-mail:, sinha052@umn.edu; sdhople@umn.edu).

Publisher Copyright:
© 1986-2012 IEEE.

Keywords

Decentralized control
multiphase converters
nonlinear control
switch interleaving

Access

10.1109/TPEL.2018.2868756

OpenUrl availability

Full text

Cite this

@article{d9156052939640e8832a78082fa15378,

title = "Decentralized Interleaving of Parallel-connected Buck Converters",

abstract = "We present a decentralized control strategy that yields switch interleaving for parallel-connected dc-dc buck converters. Compared to state-of-the-art methods that are distributed at best, the proposed architecture requires no communication, and hence, presents a variety of advantages with regard to reliability, modularity, and cost. The method is based on the digital implementation of the dynamics of a Li{\'e}nard-type oscillator circuit as the controller for the converters. Each controller only requires the locally measured output current to synthesize the pulsewidth modulation (PWM) carrier waveform. The intrinsic electrical coupling between converters drives the nonlinear-oscillator-based controllers to converge to an interleaved state with uniform phase spacing across PWM carriers, independent of the number of converters, the load, and initial conditions. We provide analytical guarantees for existence and stability of the interleaved state as well as extensive hardware results for a system of five 120 W 48 V-to-12 V dc-dc buck converters that demonstrate convergence to the interleaved state in the face of a variety of large-signal disturbances.",

keywords = "Decentralized control, multiphase converters, nonlinear control, switch interleaving",

author = "Mohit Sinha and Jason Poon and Johnson, {Brian B.} and Miguel Rodriguez and Dhople, {Sairaj V.}",

note = "Funding Information: Dr. Johnson was a recipient of the National Science Foundation Graduate Research Fellowship in 2010. He is an Associate Editor for the IEEE TRANS-ACTIONS ON ENERGY CONVERSION. Funding Information: Manuscript received May 4, 2018; revised July 22, 2018; accepted August 20, 2018. Date of publication September 3, 2018; date of current version March 29, 2019. This work was supported in part by the U.S. Department of Energy Solar Energy Technologies Office under Contract DE-EE0000-1583 and in part by the National Science Foundation under Grant ECCS-1509277. Recommended for publication by Associate Editor W. Huang. (Corresponding author: Sairaj V. Dhople.) M. Sinha and S. V. Dhople are with the Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA (e-mail:, sinha052@umn.edu; sdhople@umn.edu). Publisher Copyright: {\textcopyright} 1986-2012 IEEE.",

year = "2019",

month = may,

doi = "10.1109/TPEL.2018.2868756",

language = "English (US)",

volume = "34",

pages = "4993--5006",

journal = "IEEE Transactions on Power Electronics",

issn = "0885-8993",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "5",

}

TY - JOUR

T1 - Decentralized Interleaving of Parallel-connected Buck Converters

AU - Sinha, Mohit

AU - Poon, Jason

AU - Johnson, Brian B.

AU - Rodriguez, Miguel

AU - Dhople, Sairaj V.

N1 - Funding Information: Dr. Johnson was a recipient of the National Science Foundation Graduate Research Fellowship in 2010. He is an Associate Editor for the IEEE TRANS-ACTIONS ON ENERGY CONVERSION. Funding Information: Manuscript received May 4, 2018; revised July 22, 2018; accepted August 20, 2018. Date of publication September 3, 2018; date of current version March 29, 2019. This work was supported in part by the U.S. Department of Energy Solar Energy Technologies Office under Contract DE-EE0000-1583 and in part by the National Science Foundation under Grant ECCS-1509277. Recommended for publication by Associate Editor W. Huang. (Corresponding author: Sairaj V. Dhople.) M. Sinha and S. V. Dhople are with the Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA (e-mail:, sinha052@umn.edu; sdhople@umn.edu). Publisher Copyright: © 1986-2012 IEEE.

PY - 2019/5

Y1 - 2019/5

N2 - We present a decentralized control strategy that yields switch interleaving for parallel-connected dc-dc buck converters. Compared to state-of-the-art methods that are distributed at best, the proposed architecture requires no communication, and hence, presents a variety of advantages with regard to reliability, modularity, and cost. The method is based on the digital implementation of the dynamics of a Liénard-type oscillator circuit as the controller for the converters. Each controller only requires the locally measured output current to synthesize the pulsewidth modulation (PWM) carrier waveform. The intrinsic electrical coupling between converters drives the nonlinear-oscillator-based controllers to converge to an interleaved state with uniform phase spacing across PWM carriers, independent of the number of converters, the load, and initial conditions. We provide analytical guarantees for existence and stability of the interleaved state as well as extensive hardware results for a system of five 120 W 48 V-to-12 V dc-dc buck converters that demonstrate convergence to the interleaved state in the face of a variety of large-signal disturbances.

AB - We present a decentralized control strategy that yields switch interleaving for parallel-connected dc-dc buck converters. Compared to state-of-the-art methods that are distributed at best, the proposed architecture requires no communication, and hence, presents a variety of advantages with regard to reliability, modularity, and cost. The method is based on the digital implementation of the dynamics of a Liénard-type oscillator circuit as the controller for the converters. Each controller only requires the locally measured output current to synthesize the pulsewidth modulation (PWM) carrier waveform. The intrinsic electrical coupling between converters drives the nonlinear-oscillator-based controllers to converge to an interleaved state with uniform phase spacing across PWM carriers, independent of the number of converters, the load, and initial conditions. We provide analytical guarantees for existence and stability of the interleaved state as well as extensive hardware results for a system of five 120 W 48 V-to-12 V dc-dc buck converters that demonstrate convergence to the interleaved state in the face of a variety of large-signal disturbances.

KW - Decentralized control

KW - multiphase converters

KW - nonlinear control

KW - switch interleaving

UR - http://www.scopus.com/inward/record.url?scp=85052884817&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85052884817&partnerID=8YFLogxK

U2 - 10.1109/TPEL.2018.2868756

DO - 10.1109/TPEL.2018.2868756

M3 - Article

AN - SCOPUS:85052884817

SN - 0885-8993

VL - 34

SP - 4993

EP - 5006

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

IS - 5

M1 - 8454505

ER -

Decentralized Interleaving of Parallel-connected Buck Converters

Abstract

Bibliographical note

Keywords

Access

OpenUrl availability

Other files and links

Fingerprint

Cite this