Low-frequency sampled-data models of switched mode DC-DC converters

Huliehel, F.A.; Ben‐Yaakov, S.

doi:10.1109/63.65003

Cited by 61 publications

(12 citation statements)

References 12 publications

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“…It is possible to carry out all steps of the paper using instead a model which assumes that the control input is updated every switching periods, where represents the integer ratio of switching frequency to control frequency. The conflicting requirements of relatively fast switching with relatively slow control computation could then be resolved by selecting an appropriate See [13] for details.…”

Section: Modelingmentioning

confidence: 99%

Digital tracking control for PWM systems with unacceptable zeros

Al-Numay

Taylor

1998

IEEE Trans. Circuits Syst. I

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Perfect output tracking, which requires inversion of the input-output dynamics, is not always a practical control objective. Difficulties are encountered for systems with zeros which are unstable, or stable but lightly damped. When the zeros are unacceptable in the above sense, perfect output tracking would require the control to be either unbounded, or bounded but highly oscillatory. In this paper, an approximate output tracking control design method is introduced for pulsewidth modulated (PWM) systems with unacceptable zeros. The design method is applied to the nonlinear sampled-data model of the PWM system, and is based on output redefinition. Although the new approach leads to approximate rather than perfect output tracking, it guarantees bounded and nonoscillatory responses.

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Section: Modelingmentioning

confidence: 99%

Digital tracking control for PWM systems with unacceptable zeros

Al-Numay

Taylor

1998

IEEE Trans. Circuits Syst. I

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“…[3], where, transistor and diode are replaced by a three-terminal component in converter. The equivalent circuit approach was put forward in Ref.…”

Section: Modeling Analysis Of Quasi-resonant Convertermentioning

confidence: 99%

A computer-aided unified approach to modeling PWM and resonant converters

Gao

2005

J. of Electron.(China)

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This letter puts forward a method of modeling for the steady-state and small signal dynamic analysis on PWM, quasi-resonant and series/(parallel) resonant switching converters based on pulse-waveform integral approach. As an example~ PWM and quasi-resonant converters are used to discuss the principle of the approach. The results are compared with those in the relative literatures. Computer aided analysis are made to confirm the correctness.

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“…Moreover, the discontinuous effect of switchings is ignored and the resulting waveform may generate undesirable subharmonics or interharmonics of the cutting frequency (Mo¨llerstedt and Bernhardsson 2000). On the other hand, the sampled linear methods use tangent approximations to the non-linear sampled model (Mahabir, Verghese, Thottuveil, and Heyman 1990;Huliehel and Ben-Yaakov 1991). The recurrence is not easily obtained and it does not prevent high ripples between switching instants.…”

Section: Introductionmentioning

confidence: 98%

Practical optimal state feedback control law for continuous-time switched affine systems with cyclic steady state

Patiño

Riedinger

Iung

2009

International Journal of Control

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In this article, a method for computing an optimal state feedback control law for continuous-time switched affine systems exhibiting cyclic behaviour in steady state is presented. The hybrid solutions are deduced from the Fillipov solutions. It is shown that the optimal trajectory synthesis implies to determine singular arcs. Algebraic conditions are given to obtain these particular arcs of the trajectory. A numerical procedure is then proposed to generate optimal trajectories on a given state space area avoiding the classical two-point boundary value problem occurring in optimal control synthesis. The interpolation of the solutions set, through a neural network, yields a state feedback control law. Several examples in the power converters field show the feasibility and the efficiency of the method.

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Low-frequency sampled-data models of switched mode DC-DC converters

Cited by 61 publications

References 12 publications

Digital tracking control for PWM systems with unacceptable zeros

Digital tracking control for PWM systems with unacceptable zeros

A computer-aided unified approach to modeling PWM and resonant converters

Practical optimal state feedback control law for continuous-time switched affine systems with cyclic steady state

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