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Dynamic modeling and analysis of PCM-controlled DCM-operating buck converters-A reexamination

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Dynamic modeling and analysis of PCM-controlled DCM-operating buck converters-A reexamination. / Suntio, Teuvo.

julkaisussa: Energies, Vuosikerta 11, Nro 5, en11051267, 2018, s. 1-18.

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@article{2b64b32b2e1440b1971ac3b59cb92a5e,
title = "Dynamic modeling and analysis of PCM-controlled DCM-operating buck converters-A reexamination",
abstract = "Peak-current-mode (PCM) control was proposed in 1978. The observed peculiar behavior caused by the application of PCM-control in the behavior of a switched-mode converter, which operates in continuous conduction mode (CCM), has led to a multitude of attempts to capture the dynamics associated to it. Only a few similar models have been published for a PCM-controlled converter, which operates in discontinuous conduction mode (DCM). PCM modeling is actually an extension of the modeling of direct-duty-ratio (DDR) or voltage-mode (VM) control, where the perturbed duty ratio is replaced by proper duty-ratio constraints. The modeling technique, which produces accurate PCM models in DCM, is developed in early 2000s. The given small-signal models are, however, load-resistor affected, which hides the real dynamic behavior of the associated converter. The objectives of this paper are as follows: (i) proving the accuracy of the modeling method published in 2001, (ii) performing a comprehensive dynamic analysis in order to reveal the real dynamics of the buck converter under PCM control in DCM, (iii) providing a method to improve the high-frequency accuracy of the small-signal models, and (iv) developing control-engineering-type block diagrams to facilitate the development of generalized transfer functions, which are applicable for PCM-controlled DCM-operated buck, boost, and buck-boost converters.",
keywords = "Discontinuous conduction mode, Duty-ratio constraints, Dynamic modeling, Peak-current-mode control",
author = "Teuvo Suntio",
year = "2018",
doi = "10.3390/en11051267",
language = "English",
volume = "11",
pages = "1--18",
journal = "Energies",
issn = "1996-1073",
publisher = "MDPI",
number = "5",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Dynamic modeling and analysis of PCM-controlled DCM-operating buck converters-A reexamination

AU - Suntio, Teuvo

PY - 2018

Y1 - 2018

N2 - Peak-current-mode (PCM) control was proposed in 1978. The observed peculiar behavior caused by the application of PCM-control in the behavior of a switched-mode converter, which operates in continuous conduction mode (CCM), has led to a multitude of attempts to capture the dynamics associated to it. Only a few similar models have been published for a PCM-controlled converter, which operates in discontinuous conduction mode (DCM). PCM modeling is actually an extension of the modeling of direct-duty-ratio (DDR) or voltage-mode (VM) control, where the perturbed duty ratio is replaced by proper duty-ratio constraints. The modeling technique, which produces accurate PCM models in DCM, is developed in early 2000s. The given small-signal models are, however, load-resistor affected, which hides the real dynamic behavior of the associated converter. The objectives of this paper are as follows: (i) proving the accuracy of the modeling method published in 2001, (ii) performing a comprehensive dynamic analysis in order to reveal the real dynamics of the buck converter under PCM control in DCM, (iii) providing a method to improve the high-frequency accuracy of the small-signal models, and (iv) developing control-engineering-type block diagrams to facilitate the development of generalized transfer functions, which are applicable for PCM-controlled DCM-operated buck, boost, and buck-boost converters.

AB - Peak-current-mode (PCM) control was proposed in 1978. The observed peculiar behavior caused by the application of PCM-control in the behavior of a switched-mode converter, which operates in continuous conduction mode (CCM), has led to a multitude of attempts to capture the dynamics associated to it. Only a few similar models have been published for a PCM-controlled converter, which operates in discontinuous conduction mode (DCM). PCM modeling is actually an extension of the modeling of direct-duty-ratio (DDR) or voltage-mode (VM) control, where the perturbed duty ratio is replaced by proper duty-ratio constraints. The modeling technique, which produces accurate PCM models in DCM, is developed in early 2000s. The given small-signal models are, however, load-resistor affected, which hides the real dynamic behavior of the associated converter. The objectives of this paper are as follows: (i) proving the accuracy of the modeling method published in 2001, (ii) performing a comprehensive dynamic analysis in order to reveal the real dynamics of the buck converter under PCM control in DCM, (iii) providing a method to improve the high-frequency accuracy of the small-signal models, and (iv) developing control-engineering-type block diagrams to facilitate the development of generalized transfer functions, which are applicable for PCM-controlled DCM-operated buck, boost, and buck-boost converters.

KW - Discontinuous conduction mode

KW - Duty-ratio constraints

KW - Dynamic modeling

KW - Peak-current-mode control

U2 - 10.3390/en11051267

DO - 10.3390/en11051267

M3 - Review Article

VL - 11

SP - 1

EP - 18

JO - Energies

JF - Energies

SN - 1996-1073

IS - 5

M1 - en11051267

ER -