Modeling of one-cycle controlled switching converters

Santi, Enrico; Cuk, S.

doi:10.1109/intlec.1992.268451

Cited by 27 publications

(18 citation statements)

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“…which represents the desired relation amongd 3 The PSIM numerical simulations clearly show that the one-cycle-controlled buck converter is approximately a second-order system with the resonant frequency placed at about 850 Hz. Since the DCM small-signal model [14] of the buck converter is widely used and accepted in the literature, the discrepancy existing between the results obtained by adopting the theoretical model and the results of the numerical simulations is clearly due to the strong approximations made in deriving the dynamic model of OCC in DCM.…”

Section: Dynamic Analysis Of One-cycle-controlled Switching Convertersmentioning

confidence: 94%

“…Such values have been chosen since they are equal to those used in [2,3] where OCC was introduced for the first time. In the case of buck converter under study, the DCM occurs when the load resistance R exceeds the following value [15]:…”

Section: Static Analysis Of One-cycle-controlled Switching Convertersmentioning

confidence: 99%

“…One-cycle control (OCC) is a non-linear control technique based on the integration of a switched variable (voltage or current) in order to force its average value to be equal to some control reference [2][3][4][5][6]. The one-cycle-controlled ideal buck converter, shown in Figure 1, has been chosen as an example in order to explain the proposed model; other one-cycle-controlled converter topologies can be easily studied in a similar manner.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic model of one‐cycle control for converters operating in continuous and discontinuous conduction modes

Femia

Fortunato

Petrone

et al. 2008

Circuit Theory & Apps

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SUMMARYIn this paper a new dynamic model of one-cycle-controlled converters operating either in continuous or in discontinuous conduction mode (DCM) is introduced. The static and dynamic behaviour is analysed by using sampled-data modelling combined with the small-signal linearization of the average model of the converter's power stage. The proposed model is valid for frequencies up to half the switching frequency and, while the other dynamic models presented in the literature cover continuous conduction mode only, it also gives an accurate prediction of the system's dynamic behaviour in the DCM. The model allows to determine the closed-form expression of the reference-to-output transfer function G v ref of the system, which is a fundamental prerequisite for the design of a conventional output feedback control circuit aimed at improving the dynamic behaviour of the system in response to load variations.In this paper it is also shown that one-cycle control does not work properly in switching converters operating in deep DCM if some specific design constraints are not fulfilled.The theoretical predictions are confirmed by the results of suitable numerical simulations and laboratory experiments on a one-cycle-controlled buck-switching converter.

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Section: Dynamic Analysis Of One-cycle-controlled Switching Convertersmentioning

confidence: 94%

Section: Static Analysis Of One-cycle-controlled Switching Convertersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic model of one‐cycle control for converters operating in continuous and discontinuous conduction modes

Femia

Fortunato

Petrone

et al. 2008

Circuit Theory & Apps

View full text Add to dashboard Cite

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“…1 a buck converter with its nodes' waveforms has been sketched. At the input of the filter there is a pulse train with a magnitude that is equal to the input voltage and its average is determined by the following relation [1]- [8].…”

Section: A Buck Convertersmentioning

confidence: 99%

“…Its main advantages over duty ratio programming, such as better linenoise reduction, automatic overload protection, effective first order transfer function for buck converters and the fact that it is easy to parallel by using a common control, has made it a very popular controll method [5]- [8].…”

Section: Introductionmentioning

confidence: 99%

Improvement of One-Cycle Controller Response with a Current Mode Controller

Ruzbehani¹,

Zhou²,

Mirzaei³

2010

Journal of Power Electronics

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The most important feature of the one-cycle control method is its excellent ability in line disturbance rejection. However, when it is used as a controller in dc-dc converters, it has an undesirable transient response. The voltage overshoot at the transient time, which usually exists in one-cycle controlled converters, is unwanted in many applications and it is sometimes hazardous. In this paper, it is shown that the combination of a one-cycle controller with a current mode controller, can improve the transient response and consequently the overshoot can be controlled. Therefore, the combined controller has the excellent line disturbance rejection of a one-cycle controller and the output current limiting capability of current mode controllers. Because in this scheme a one-cycle controller is the master controller, the problem of instability of current mode control, will not happen. By simulation and a practical prototype, the capability of the method is shown.

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