Small-signal modelling and analysis of switching converters using MATLAB

Duarte, JL Jorge

doi:10.1080/002072198134283

Cited by 14 publications

(6 citation statements)

References 10 publications

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“…In this paper, the power stage is modeled and analyzed using the sampled-data approach [23,24,25,26,27,28]. This work complements the authors' work [27,29] which develops sampled-data models and analysis for the closed-loop PWM DC-DC converter.…”

mentioning

confidence: 70%

Sampled-Data Modeling and Analysis of the Power Stage of PWM DC-DC Converters

Fang¹,

Abed²

1999

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ISR develops, applies and teaches advanced methodologies of design and analysis to AbstractThe power stage of the PWM DC-DC converter is modeled and analyzed using the sampleddata approach. The work addresses continuous and discontinuous conduction mode under voltage mode control, and continuous conduction mode under current mode control. For each configuration, nonlinear and linearized sampled-data models, and control-to-output transfer function are derived. Using this approach, both current mode control and discontinuous conduction mode can be handled systematically in a unified framework, making the modeling for these cases simpler than with the use of averaging. The results of this paper are similar to results of Tymerski, but they are presented in a simpler manner tailored to facilitate immediate application to specific circuits. It is shown how sampling the output at certain instants improves the obtained phase response. Frequency responses obtained from the sampled-data model are more accurate than those obtained from various averaged models. In addition, a new ("lifted") continuous-time switching frequency-dependent model of the power stage is derived from the sampled-data model. Detailed examples illustrate the modeling tools presented here, and also provide a means of comparing results obtained from the sampled-data approach with those obtained from averaging.

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confidence: 70%

Sampled-Data Modeling and Analysis of the Power Stage of PWM DC-DC Converters

Fang¹,

Abed²

1999

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“…State space techniques are employed to derive an equivalent non-linear discrete time model of the buck and boost cell [1]. For a continuous time description of circuit operation of the cells the system is characterized as follows.…”

Section: Sampled Data Modelmentioning

confidence: 99%

Dynamic capacitor for HV applications

Dijkhuizen

Gödde

2010

2010 IEEE Energy Conversion Congress and Exposition

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Dynamic capacitive VARs are becoming more important in the modern power system. This paper gives an examination of the behavior of a dynamic capacitor based on buck and boost cells. The principle of operation and the characteristics are explained. The basic principle is extended to the series connection of cells to reach higher voltages. A simulation case is provided to demonstrate the effectiveness of the concept. Design issues and principle of control are briefly discussed.

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“…Discrete time models for switched linear systems are usually created by means of state averaging [9] or zeroorder-hold modelling [10].…”

Section: Discrete Time Modellingmentioning

confidence: 99%

Disturbance Observer-Based Control of a Dual-Output LLC Converter for Solid-State Lighting Applications

Roes

Duarte

Hendrix

2011

IEEE Trans. Power Electron.

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Abstract-Feedback sensor isolation is often an expensive necessity in power converters, for reasons of safety and electromagnetic compatibility. A disturbance observer-based control strategy for a dual-output resonant converter is proposed to overcome this problem. Current control of two LED loads is achieved through estimation rather than measurement. Robustness against temperature changes, which have significant impact on the behaviour of the LEDs, is achieved through estimation of offsets in the forward voltages of the LED-strings. The power converter and LEDs are modelled accurately to obtain a good estimation accuracy. The whole implementation is steered towards a low cost solution.

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Small-signal modelling and analysis of switching converters using MATLAB

Cited by 14 publications

References 10 publications

Sampled-Data Modeling and Analysis of the Power Stage of PWM DC-DC Converters

Sampled-Data Modeling and Analysis of the Power Stage of PWM DC-DC Converters

Dynamic capacitor for HV applications

Disturbance Observer-Based Control of a Dual-Output LLC Converter for Solid-State Lighting Applications

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