Indirect Sliding Mode Control for DC–DC SEPIC Converters

Kömürcügil, Hasan; Biricik, Samet; Güler, Naki

doi:10.1109/tii.2019.2960067

Cited by 68 publications

(39 citation statements)

References 27 publications

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“…Hence, the sliding mode is stable if the following condition holds [36], [37] σ k dσ k dt < 0 (26) Now, let us show that the condition in (26) holds for phase a. Substituting the derivative of (23) into (26) gives…”

Section: Line Current Control Using Smcmentioning

confidence: 99%

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Sliding-Mode Control Strategy for Three-Phase Three-Level T-Type Rectifiers With DC Capacitor Voltage Balancing

Bayhan

Kömürcügil

2020

IEEE Access

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A sliding mode control (SMC) strategy with dc capacitor voltage balancing is proposed for three-phase three-level T-type rectifiers. The proposed SMC strategy is designed in the abc frame rather than the dq frame. In this case, the necessity of three-phase current transformations is eliminated. The proposed SMC is based on the errors of the line currents. The amplitude of line current references is generated by controlling the dc voltage using a proportional-integral (PI) controller. In order to obtain unity power factor, the generated reference amplitude is multiplied by the corresponding sinusoidal waveform obtained from the phase locked loop (PLL) operating with grid voltages. The dc capacitor voltage balancing is achieved by adding a proportional control term into the line current reference obtained for each rectifier leg. The performance of the proposed control strategy is validated by simulations and experiments during steady-state, transients caused by load change, and unbalanced grid conditions. The results show that the proposed control strategy offers excellent steady-state and dynamic performances with low THD in the line currents, zero steady-state error in the output voltage, and very fast dynamic response.

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Section: Line Current Control Using Smcmentioning

confidence: 99%

“…Equation 35is a quadratic equation which is written as The expression for I can be obtained by solving (36) as follows…”

Section: Determination Of Line Current Amplitude and Maximum Allowmentioning

confidence: 99%

Sliding-Mode Control Strategy for Three-Phase Three-Level T-Type Rectifiers With DC Capacitor Voltage Balancing

Bayhan

Kömürcügil

2020

IEEE Access

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“…It is evident from (9) that the SMC is not sensitive to the system parameters in the sliding mode, and hence the dynamics of the converter is dependent on λ . The movement of the states is ensured to stay on the S = 0 line by satisfying the following condition 37‐39 :

S \overset{S}{true} < 0

…”

Section: Smc With Maximized Existence Regionmentioning

confidence: 99%

Sliding mode control strategy with maximized existence region for DC–DC buck converters

Kömürcügil

2020

Int Trans Electr Energ Syst

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Summary In this article, a sliding mode control (SMC) strategy with maximized existence region (ER) is presented for DC–DC buck converters. The ERs of the sliding mode are determined from the existence condition of the SMC. It is shown that the ER can be enlarged to its maximum size by an optimum sliding coefficient whose equation is determined analytically. Also, it is pointed out that the enlargement of the ER results in a considerable improvement in the dynamic response of the output voltage. In addition, it is shown that the optimum sliding coefficient is not sensitive to the variations in the DC input voltage and load resistance. Moreover, the capacitor current that is employed in the sliding surface function to avoid the derivative operation does not lead to any steady‐state error in the output voltage in case of an uncertainty in the capacitance value. The correctness of the proposed control approach is validated by computer simulations and experimental results. These results demonstrate that the proposed SMC strategy results in an excellent dynamic response without overshoot and undershoot in the output voltage and inductor current and guarantees a maximized ER for the sake of stronger closed‐loop stability.

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“…The robustness of the algorithm is proved by simulation and practical results under voltage and load disturbance conditions. An indirect SMC method is implemented in [17] to regulate single-ended primary-inductor converters (SEPIC) voltage in which the sliding function is reframed by incorporating the current error. This technique is simple to use and reduces the cost of the controller.…”

Section: Introductionmentioning

confidence: 99%

Input-output linearization of DC-DC converter with discrete sliding mode fuzzy control strategy

Karthikeyan

Tiwari²,

Vedi

et al. 2022

IJECE

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The major thrust of the paper is on designing a fuzzy logic approach has been combined with a well-known robust technique discrete sliding mode control (DSMC) to develop a new strategy for discrete sliding mode fuzzy control (DSMFC) in direct current (DC-DC) converter. Proposed scheme requires human expertise in the design of the rule base and is inherently stable. It also overcomes the limitation of DSMC, which requires bounds of uncertainty to be known for development of a DSMC control law. The scheme is also applicable to higher order systems unlike model following fuzzy control, where formation of rule base becomes difficult with rise in number of error and error derivative inputs. In this paper the linearization of input-output performance is carried out by the DSMFC algorithm for boost converter. The DSMFC strategy minimizes the chattering problem faced by the DSMC. The simulated performance of a discrete sliding mode fuzzy controller is studied and the results are investigated.

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Indirect Sliding Mode Control for DC–DC SEPIC Converters

Cited by 68 publications

References 27 publications

Sliding-Mode Control Strategy for Three-Phase Three-Level T-Type Rectifiers With DC Capacitor Voltage Balancing

Sliding-Mode Control Strategy for Three-Phase Three-Level T-Type Rectifiers With DC Capacitor Voltage Balancing

Sliding mode control strategy with maximized existence region for DC–DC buck converters

Input-output linearization of DC-DC converter with discrete sliding mode fuzzy control strategy

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