Experimental validation with a control point of view analysis of the SEPIC converter

“…1a) is a strongly nonlinear fourth order system whose behavior depends on the operating point [12]. It is known for the complexity of its equations and model unlike other fourth order converters like the Ćuk.…”

Section: Introductionmentioning

confidence: 99%

“…are respectively the min and max singular , we state the overall stability condition:If the observer gains K 1 and K 2 and the Lyapunov matrix P are chosen such that the system(12) is stable and…”

mentioning

confidence: 99%

Nonlinear sliding mode observer and control of high order DC-DC converters

Jaafar¹,

Godoy²,

Lefranc³

et al. 2010

IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society

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In this paper, the application of the Sliding Mode Theory, in terms of observer and control design, to the DC-DC Single-Ended Primary Inductor Converter (SEPIC) is investigated. The choice and influence of the sliding surface regarding the state vector is presented. Usual sliding surfaces chosen to control other high order DC-DC converters are found not to work on the SEPIC. Thus, other surfaces are proposed here and which require the presence of more than one state variable. Also, an extended sliding mode observer is proposed to estimate the state vector. Results are experimentally validated.

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“…The output voltage for the Boost converter is above the input, while for the Buck converter is below. The output of the Buck-Boost converter can be either higher or lower than the input signal, but the polarity will be inverse with respect to the input signal [4]. On the other hand, a Sepic (Single-Ended Primary-Inductor Converter) converter is a type of converter that regardless of variations in the input signal or loads variations maintains a constant output.…”

Section: Introductionmentioning

confidence: 99%

Analysis and non-linear control of SEPIC dc-dc converter in photovoltaic systems

Salazar-Duque

Ortiz-Rivera

González-Llorente

2015

2015 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)

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SEPIC dc-dc converter has multiple applications as a power conditioning system because it has a nonpulsating input current and its voltage ratio is both step-down and step-up. However, due to the non-linear characteristics of a SEPIC converter, a non-linear control is more suitable to attain better performance in voltage regulation. We designed a Sliding-Mode control and a passivity-based control for controlling both the output voltage of the SEPIC converter and the input voltage to reach the maximum power of a photovoltaic module. This paper presents the stability analysis and the design of the two non-linear controllers. The simulation results show a good performance of both controllers with fast transient responses and zero steady errors. However, the Sliding-Mode control shows less inductor current than the Passivity-Based control. These results confirm the good performance of non-linear control for a SEPIC converter in photovoltaic systems; we expect experimental validations in future work.

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Experimental validation with a control point of view analysis of the SEPIC converter

Cited by 16 publications

References 8 publications

Design and experimental validation of a hybrid optimal control for DC-DC power converters

Design and experimental validation of a hybrid optimal control for DC-DC power converters

Nonlinear sliding mode observer and control of high order DC-DC converters

Analysis and non-linear control of SEPIC dc-dc converter in photovoltaic systems

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