Interleaved buck converters based on winner-take-all switching

Saito, Toshimichi; Tasaki, Seiji; Torikai, Hiroyuki

doi:10.1109/tcsi.2005.851676

Cited by 32 publications

(38 citation statements)

References 28 publications

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“…The regulation performances were only illustrated through simulations. In Saito, Tasaki, and Torikai, (2005), a winner-take-all switching technique was used to control the converter switches, and a chaos analysis was presented. It was shown that current ripples can be reduced by making a judicious choice of the switching rule.…”

Section: Introductionmentioning

confidence: 99%

Robust nonlinear adaptive control of multiphase synchronous buck power converters

Fadil¹,

Giri²

2009

Control Engineering Practice

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a b s t r a c tThe problem of controlling multiphase synchronous buck power converters is considered. The aims are to regulate the output voltage of the converter and to ensure adequate current sharing between its different channels. Using the backstepping technique, an adaptive controller is designed based on a large-signal bilinear model of the whole multi-channel converter. A parameter projection is used to ensure that the obtained adaptive controller is robust to parasitic resistances. The controller is formally shown to meet the objectives of closed-loop asymptotic stability, output reference tracking, and equal load sharing. The attraction region depends on the uncertain parasitic impedance size, with the attraction region being larger for smaller parasitic impedances. In the ideal case of no parasitic impedances, the closed-loop asymptotic stability is global. These theoretical results are confirmed by simulation.

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Section: Introductionmentioning

confidence: 99%

Robust nonlinear adaptive control of multiphase synchronous buck power converters

Fadil¹,

Giri²

2009

Control Engineering Practice

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“…The paralleled dc-dc converters have been studied extensively due to several reasons. First, they can realize current sharing with low ripple that is a key operation for lower voltages with higher current capabilities in the next generation micro-processors [4] - [7]; . Second, they are is basic for multi-input systems relating to clean energy supply and so on [8] - [11].…”

Section: Introductionmentioning

confidence: 99%

“…These results can contribute not only as a basic information to realize desired operation but also as a trigger to develop novel bifurcation theory based on multi-phase synchronous phenomena. Note that the single/parallel SDSs are studied in our previous papers [7], [11], [12], however, they consider either one switching rule only or different switching rules. Note that the diode D is assumed to operate inversely to S [7].…”

Section: Introductionmentioning

confidence: 99%

“…Note that the single/parallel SDSs are studied in our previous papers [7], [11], [12], however, they consider either one switching rule only or different switching rules. Note that the diode D is assumed to operate inversely to S [7]. The circuit dynamics on each state is described by where J u and J l are the upper and lower thresholds of the inductor current i, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Stability analysis of switched dynamical systems for effective switching strategy of DC/DC converters

Kimura

Saito

2008

2008 34th Annual Conference of IEEE Industrial Electronics

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This paper studies simple switched dynamical systems based on simplified models of single/parallel dc-dc converters in current mode control. The systems are characterized by several switching rules depending on both periodic clock and state variables. The systems have piecewise constant vector field and piecewise linear solutions: they are well suited for precise analysis. We can clarify parameters conditions for stability of desired operations and for generation of chaotic behavior. These results can contribute not only as basic information to design efficient dc-dc converters but also as a trigger to develop novel bifurcation theory.

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“…Paralleling of standardized converters is an approach used widely in distributed power systems for both front-end and load converters. In parallel converter systems, mandatory control is needed to ensure proper current sharing, and many effective control schemes have been proposed [4][5][6][7][8][9][10]. One widely used method for balancing the currents among the modules is the master-slave current sharing method.…”

Section: Introductionmentioning

confidence: 99%

Boundaries between fast‐ and slow‐scale bifurcations in parallel‐connected buck converters

Huang

Tse

2007

Circuit Theory & Apps

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SUMMARYThis paper studies a system of parallel-connected dc/dc buck converters under master-slave current sharing and proportional-integral (PI) PWM control. Two distinct types of bifurcations can be identified. Depending on the value of the integral control time constant, the system exhibits either a slow-scale bifurcation (Neimark-Sacker bifurcation) or a fast-scale bifurcation (period doubling). Extensive simulations are used to capture the behaviour. Trajectories and Poincaré sections before and after these bifurcations are shown. The boundaries between these two types of bifurcations are located. In particular, the parameter spaces of the controllers for these bifurcations are totally different. A detailed analysis is performed, based on examining the Jacobian and characteristic multipliers of the describing discrete-time map.

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Interleaved buck converters based on winner-take-all switching

Cited by 32 publications

References 28 publications

Robust nonlinear adaptive control of multiphase synchronous buck power converters

Robust nonlinear adaptive control of multiphase synchronous buck power converters

Stability analysis of switched dynamical systems for effective switching strategy of DC/DC converters

Boundaries between fast‐ and slow‐scale bifurcations in parallel‐connected buck converters

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