Sliding coefficients estimation for fixed frequency sliding mode control of boost converter

Teodorescu, Mihail; Stanciu, Radu D.

doi:10.1109/atee.2015.7133890

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…This method implements directly an ideal equivalent control calculated from a desired switching surface by a PWM at fixed frequency, while an algorithm to estimate the switching surface parameters was recently proposed in [23]. Results were summarized in [22], confirming an overall good performance.…”

mentioning

confidence: 77%

Switching Frequency Regulation in Sliding Mode Control by a Hysteresis Band Controller

Repecho

Biel

Olm

et al. 2017

IEEE Trans. Power Electron.

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Abstract-Fixing the switching frequency is a key issue in sliding mode control implementations. This paper presents a hysteresis band controller capable of setting a constant value for the steady state switching frequency of a sliding mode controller in regulation and tracking tasks. The proposed architecture relies on a piecewise linear modeling of the switching function behavior within the hysteresis band, and consists of a discrete-time integraltype controller that modifies the amplitude of the hysteresis band of the comparator in accordance with the error between the desired and the actually measured switching period. For tracking purposes an additional feedforward action is introduced to compensate the time variation of the switching function derivatives at either sides of the switching hyperplane in the steady state. Stability proofs are provided, and a design criterion for the control parameters to guarantee closed-loop stability is subsequently derived. Numerical simulations and experimental results validate the proposal.

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mentioning

confidence: 77%

Switching Frequency Regulation in Sliding Mode Control by a Hysteresis Band Controller

Repecho

Biel

Olm

et al. 2017

IEEE Trans. Power Electron.

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“…When S1 is OFF the system is represented by the following equations (3,4) (3) (4) Using KVL the loop equations are formed, from that we can write (5) (6) The sliding surface is given by (7) Where x1 is the inductor current and x2 is the output voltage, e1 is the voltage error, e2 is the current error [6,7].…”

Section: Figure 1 Block Diagram Of Smc/dsmcmentioning

confidence: 99%

Qualified Analysis of DSMC over SMC for Boost Converter

Karthikeyan¹,

Kumar²,

Ramrao³

2017

IJCA

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“…The scheme is named as PWM-SMC. In [46,47], a bandwidth based parameter selection of the sliding surface is proposed for PWM-SMC. It is important to emphasize that in SMC, the robustness against unknown disturbances and parameter changes is achieved because of the discontinuous control term.…”

Section: Introductionmentioning

confidence: 99%

A Novel Filter Extracted Equivalent Control Based Fixed Frequency Sliding Mode Approach for Power Electronic Converters

2019

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The key issue in the implementation of the Sliding Mode Control (SMC) in analogue circuits and power electronic converters is its variable switching frequency. The drifting frequency causes electromagnetic compatibility issues and also adversely affect the efficiency of the converter, because the proper size of the inductor and the capacitor depends upon the switching frequency. Pulse Width Modulation based SMC (PWM-SMC) offers the solution, however, it uses either boundary layer approach or employs pulse width modulation of the ideal equivalent control signal. The first technique compromises the performance within the boundary layer, while the latter may not possess properties like robustness and order reduction due to the absence of the discontinuous function. In this research, a novel approach to fix the switching frequency in SMC is proposed, that employs a low pass filter to extract the equivalent control from the discontinuous function, such that the performance and robustness remains intact. To benchmark the experimental observations, a comparison with existing double integral type PWM-SMC is also presented. The results confirm that an improvement of 20% in the rise time and 25.3% in the settling time is obtained. The voltage sag during step change in load is reduced to 42.86%, indicating the increase in the robustness. The experiments prove the hypothesis that a discontinuous function based fixed frequency SMC performs better in terms of disturbances rejection as compared to its counterpart based solely on ideal equivalent control.

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Sliding coefficients estimation for fixed frequency sliding mode control of boost converter

Cited by 7 publications

References 9 publications

Switching Frequency Regulation in Sliding Mode Control by a Hysteresis Band Controller

Switching Frequency Regulation in Sliding Mode Control by a Hysteresis Band Controller

Qualified Analysis of DSMC over SMC for Boost Converter

A Novel Filter Extracted Equivalent Control Based Fixed Frequency Sliding Mode Approach for Power Electronic Converters

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