A Novel Modeling Method of Nonideal Buck-Boost Converter in DCM

Gong, Renxi; Xie, Liang-Liang; Wang, Kuang; Cui, Ningren

doi:10.1109/icic.2010.230

Cited by 12 publications

(8 citation statements)

References 11 publications

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“…10), and repeated for example in [14,15]) the values of currents and voltages in particular subintervals (ON or OFF) are in some points mistaken with averaged values over a switching period. In derivation of averaged models for DCM [1,2,[11][12][13]16] the treatment of average voltage on an inductor is incoherent (assumed to be zero in one part of considerations and nonzero in another). As a result, some inaccuracies in averaged models of converters with parasitic resistances or working in DCM are obtained, as discussed in [9].…”

Section: Introductionmentioning

confidence: 99%

Equivalent circuits for averaged description of DC-DC switch-mode power converters based on separation of variables approach

Janke¹

2013

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. Large-signal and small-signal averaged models of basic switch-mode DC-DC power converters: BUCK (step-down) and BOOST (step-up) are presented. Models are derived with the separation of variables approach and have the form of equivalent circuits, suitable for a circuit simulation. Apart from equivalent circuits, small-signal transmittances of converters for CCM and DCM modes are discussed. Parasitic resistances of all components of converters are taken into account. A few examples of simulations and measurement results of selected converter characteristics are also presented. It is shown, that neglecting parasitic resistances (often met in works of other authors) may lead to serious errors in an averaged description of converters.

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Section: Introductionmentioning

confidence: 99%

Equivalent circuits for averaged description of DC-DC switch-mode power converters based on separation of variables approach

Janke¹

2013

Bulletin of the Polish Academy of Sciences: Technical Sciences

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“…[12]. This model has been next discussed and modified in some papers, for example [38][39][40][41][42][43][44]. The basic structure of the model shown in Figure 9 corresponds to Figure 3, in accordance with general method of switch averaging.…”

Section: Small-signal Transmittances Resulting From Models Given In [1]mentioning

confidence: 99%

Small-signal transmittances of DC-DC step-down PWM converter in various operation modes

Janke¹

2015

Archives of Electrical Engineering

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Small-signal transmittances: input-to-output and control-to-output of BUCK converter power stage working in CCM or DCM mode are discussed. Ideal converter case and converter with parasitic resistances are considered separately. Derivations of small-signal transmittances, based on different approaches to finding the converter averaged models, are presented and the results are compared. Apart from theoretical considerations, some results of numerical calculations are presented. θ -small-signal representation of duty ratio in s-domain, CCM -continuous conduction mode, DCM -discontinuous conduction mode.

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“…(6). Several modifications of averaged models obtained by switch averaging technique may be found in the literature [5][6][7][11][12][13][14][15][16][17]. The common feature of these models is a two-pole form of main transmittances.…”

Section: Averaged Models Of Buck Convertermentioning

confidence: 99%

Comparison of transient states in step-down power converter (BUCK) in continuous and discontinuous conduction mode

Janke¹,

Walczak²

2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The object of this paper is a step-down (BUCK) power converter working in the continuous conduction mode (CCM) or discontinuous conduction mode (DCM). Two types of transient states in a converter have been analyzed and observed experimentally: slow transients, described by averaged models of a converter and fast transients, in the course of a single switching period. The averaged models of converter working in CCM, presented in various sources are similar, with some differences concerning only the description of parasitic effects. The averaged models for DCM depend on the adopted modeling method. Models obtained by the switch averaging approach are second-order models (containing two reactive elements in equivalent circuit representation). Models obtained by the separation of variables approach are first-order models. The experimental results given in this paper show the first-order type of transients. Another group of experiments concern fast transients in the course of a single switching period. The oscillations of inductor voltage in the part of a switching period are observed for DCM.

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A Novel Modeling Method of Nonideal Buck-Boost Converter in DCM

Cited by 12 publications

References 11 publications

Equivalent circuits for averaged description of DC-DC switch-mode power converters based on separation of variables approach

Equivalent circuits for averaged description of DC-DC switch-mode power converters based on separation of variables approach

Small-signal transmittances of DC-DC step-down PWM converter in various operation modes

Comparison of transient states in step-down power converter (BUCK) in continuous and discontinuous conduction mode

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