Sliding mode controller for buck DC-DC Converter
20 Mar 2012-pp 1-6
TL;DR: A new control strategy by compromising both schemes advantages and avoiding their drawbacks is proposed, analyzed and simulated.
Abstract: This paper is a simple and systematic approaches to the design of sliding mode controller for buck DC-DC Converters. Various aspects of the design, including the practical problems and the proposed solutions, are detailed. However, these control strategies can't compensate for large load current and input voltage variations. In this paper, a new control strategy by compromising both schemes advantages and avoiding their drawbacks is proposed, analyzed and simulated.
Citations
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01 Jan 2019
TL;DR: The simulation results have been implemented in MATLAB/Simulink to validate fast estimation of load current, output voltage and disturbance rejection in a closed-loop process.
Abstract: The evolution of the modern technologies and the development of power electronics has led to the extensive use of DC-DC Buck-Boost converters in the application of power amplifier, battery management system, self-regulating power supplies etc, as they have higher output voltage and low operating duty cycle. The problem of degradation in adeptness of the Buck-Boost converters in presence of a load and lumped parameter uncertainties are analyzed. An Extended High Gain Observer is formulated to estimate the output voltage, load current, and its first derivative which is considered to be nonlinear and bounded. The reference current is compared with the estimated load current, forming a sliding surface. Sliding Mode Controller ensures convergence of estimated load current trajectories to reference current trajectories in finite time. Finally, an inner control loop generates a duty ratio resulting in output voltage which tracks the required reference voltage. The simulation results have been implemented in MATLAB/Simulink to validate fast estimation of load current, output voltage and disturbance rejection in a closed-loop process.
11 citations
Cites background from "Sliding mode controller for buck DC..."
...In this approach a high speed switching control law is designed which forces trajectories to move to a predetermined path in state variable space called sliding surface and to stay in the surface thereafter [17]....
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...Extended high gain observer is proposed to estimate output voltage, load current and its first derivative along with sliding-mode [17] controller with nested current control mode to perform disturbance rejection....
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23 Feb 2017
TL;DR: In this paper, two different MPP tracking methods, fuzzy logic control (FL) and sliding mode control (SMC), were compared using Matlab tools Simulink, considering their efficiency in solar energy production.
Abstract: Solar panels have a nonlinear voltage-current characteristic, with a distinct maximum power point (MPP), which depends on the environmental factors, such as temperature and irradiation. In order to continuously harvest maximum power from the solar panels, they have to operate at their MPP despite the inevitable changes in the environment. Various methods for maximum power point tracking (MPPT) were developed and finally implemented in solar power electronic controllers to increase the efficiency in the electricity production originate from renewables. In this paper we compare using Matlab tools Simulink, two different MPP tracking methods, which are, fuzzy logic control (FL) and sliding mode control (SMC), considering their efficiency in solar energy production.
4 citations
Patent•
22 Nov 2013
TL;DR: In this article, a pulse width modulation DC-DC converter with a proportional integral derivative controller and a compensation unit operating point was proposed. But the compensation unit was not designed to provide a uniform predetermined node during the initial driving period.
Abstract: A pulse width modulation DC - DC converter. A pulse width modulation DC - DC converter comprising: a switch unit, the switch unit converting an input voltage into an output voltage; proportional integral derivative controller, the PID controller generates a voltage proportional integral derivative control; comparator which comparator generates a control voltage switch; the switch control switch controller, the switch controller provides the switching control signal to the switching unit, turns on the charge switch in the oN period of the switching control voltage and switches off the discharge at the same time, and in the voltage-off period of switch off the charging and discharging switches are simultaneously turned on; and a compensation unit operating point, the operating point in response to the operating point compensation unit operates the compensation signal and to provide a uniform predetermined node during the initial driving period electrical initialization voltage levels.
1 citations
Dissertation•
01 Jan 1991
TL;DR: In this article, le travail de cette these porte sur la synthese de systemes de commande robuste for convertisseurs electriques, en utilisant le principe des modes glissants (commande a structure variable).
Abstract: Le travail de cette these porte sur la synthese de systemes de commande robuste pour des convertisseurs electriques, en utilisant le principe des modes glissants (commande a structure variable). Les convertisseurs electriques sont par nature des systemes dont la structure varie (commutation d'interrupteurs), par consequent la technique des modes glissants s'adapte bien au fonctionnement de ces convertisseurs. Dans un premier temps, ce type de commande est synthetise pour un onduleur realise a partir d'un abaisseur reversible en courant et en tension. Des resultats de simulation et experimentaux confirment le bien fonde de la theorie developpee. Dans un deuxieme temps, une extension du champ d'application de la technique des modes glissants a ete effectuee sur un convertisseur serie resonnant pont complet. Celui-ci presente des caracteristiques non lineaires. Cependant, sous certains conditions de fonctionnement du convertisseur serie resonnant et avec un choix approprie des variables d'etat, le convertisseur serie resonnant se comporte comme un abaisseur conventionnel. Par les resultats de simulation, nous montrons l'interet de cette technique de commande pour ce type de convertisseur. Le bilan de ce travail permet de proposer la technique de commande par modes glissants pour des convertisseurs electriques, car il a ete montre en particulier, la robustesse de cette commande meme en presence des fortes perturbations, tant sur la charge que sur la tension source
1 citations
TL;DR: Olatunji Obalowu Mohammed, Mohd Wazir Mustafa, Sani Salisu, Ahsanullah Memon, Saddam Hussain, Abdulrahaman Okino Otuoze, Oladimeji Ibrahim School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Johor Bahru, Malaysia Department of Electrical and Electronics Engineering as mentioned in this paper .
Abstract: Olatunji Obalowu Mohammed, Mohd Wazir Mustafa, Sani Salisu, Ahsanullah Memon, Saddam Hussain, Abdulrahaman Okino Otuoze, Oladimeji Ibrahim School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Johor Bahru, Malaysia Department of Electrical and Electronics Engineering, Faculty of Engineering and Technology, University of Ilorin, Kwara, Nigeria Department of Electrical Engineering, Faculty of Engineering, Ahmadu Belo University (ABU), Kaduna, Nigeria
References
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Book•
01 Jan 1999
TL;DR: Sliding mode control (SMC) is gaining increasing importance as a universal design tool for the robust control of linear and nonlinear systems as mentioned in this paper, and is particularly useful for electro-mechanical systems because of its discontinuous structure.
Abstract: Sliding Mode Control (SMC) is gaining increasing importance as a universal design tool for the robust control of linear and nonlinear systems. The strengths of sliding mode controllers result from the ease and flexibility of the methodology for their design and implementation. They provide inherent order reduction, direct incorporation of robustness against system uncertainties and disturbances, and an implicit stability proof. They also allow for the design of high performance control systems at low costs. SMC is particularly useful for electro-mechanical systems because of its discontinuous structure. In fact, since the hardware of many electro-mechanical systems (such as electric motors) prescribes discontinuous inputs, SMC has become the natural choice for direct implementation. The book is intended primarily for engineers and establishes an interdisciplinary bridge between control science, electrical and mechanical engineering.
2,593 citations
Additional excerpts
...kref is chosen so that the field of sliding mode contains the desired operating region [10]....
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TL;DR: This paper presents a simple and systematic approach to the design of a practical sliding mode voltage controller for buck converters operating in continuous conduction mode.
Abstract: This paper presents a simple and systematic approach to the design of a practical sliding mode voltage controller for buck converters operating in continuous conduction mode. Various aspects of the design, including the associated practical problems and the proposed solutions, are detailed. A simple and easy-to-follow design procedure is also described. Experimental results are presented to illustrate the design procedure.
310 citations
"Sliding mode controller for buck DC..." refers background or methods in this paper
...This feature can be easily incorporated into the sliding mode controller by a suitable modification of the sliding line [5]....
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...Controller Design The basic idea of SM control is to design a certain sliding surface in its control law that will direct the trajectory of the state variables towards a desired origin when coincided [5]....
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...It was previously derived in [5] that:...
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TL;DR: A simple unified approach to the design of fixed-frequency pulsewidth-modulation-based sliding-mode controllers for dc-dc converters operating in the continuous conduction mode is presented.
Abstract: This paper presents a simple unified approach to the design of fixed-frequency pulsewidth-modulation-based sliding-mode controllers for dc-dc converters operating in the continuous conduction mode. The design methodology is illustrated on the three primary dc-dc converters: buck, boost, and buck-boost converters. To illustrate the feasibility of the scheme, an experimental prototype of the derived boost controller/converter system is developed. Several tests are performed to validate the functionalities of the system
289 citations
"Sliding mode controller for buck DC..." refers background in this paper
...Pulse Width Modulation (PWM) and the sliding regime [13][14]....
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20 Jun 1993
TL;DR: In this paper, a general-purpose sliding-mode controller is described, which can be applied to most DC-DC power converter topologies and provides extreme robustness and speed of response against supply, load, and parameter variations.
Abstract: A general-purpose sliding-mode controller is described, which can be applied to most DC-DC power converter topologies. It has the same circuit complexity as standard current-mode controllers, but provides extreme robustness and speed of response against supply, load, and parameter variations. Moreover, contrary to other sliding-mode techniques, the proposed solution features constant switching frequency in the steady state, synchronization to external triggers, and absence of steady-state errors in the output voltage. >
260 citations
"Sliding mode controller for buck DC..." refers background in this paper
...System Modeling To illustrate the underlying principal, the state space description of the buck converter under sliding mode voltage control, where the control parameters are the output voltage, output voltage error dynamic, inductor current and reference voltage (in phase canonical form) [6], is first discussed....
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TL;DR: It is demonstrated that, with the proposed controller, the boost converter has a faster response and a lower voltage overshoot over a wide range of operating conditions as compared to that under the widely used peak current-mode controller.
Abstract: This paper proposes a fast-response sliding-mode controller for controlling boost-type converters requiring a fast dynamical response over a wide range of operating conditions. The various aspects of the controller, which include the method of generating the reference-current profile, the choice of sliding surface, the existence and stability properties, and the selection of the control parameters, are discussed. Experimental results are presented to validate the theoretical design and to illustrate the strength of the proposed controller. It is demonstrated that, with the proposed controller, the boost converter has a faster response and a lower voltage overshoot over a wide range of operating conditions as compared to that under the widely used peak current-mode controller. Moreover, it is easily realized with simple analog circuitries.
210 citations