Implementing sliding mode control for buck converter

Ahmed, M.; Kuisma, Mikko; Tolsa, K.; Silventoinen, Pertti

doi:10.1109/pesc.2003.1218129

Cited by 56 publications

(18 citation statements)

References 2 publications

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“…In all cases, the use of postfilter feedback generally serves to lessen the negative effects of the output filter. Many very similar solutions have appeared in the somewhat wider context of single-phase buck dc/dc converters, where PD-based capacitor voltage feedback is richly represented [20]- [23] along with capacitor current feedback [24], [25] and direct inductor current feedback [26]. It has also been shown that the equivalent series resistance of the output capacitor can be usefully incorporated into the capacitor current estimation system [27], relaxing the demands on the differentiation circuitry.…”

Section: Hysteresis-based So Controllersmentioning

confidence: 99%

Carrier Distortion in Hysteretic Self-Oscillating Class-D Audio Power Amplifiers: Analysis and Optimization

Hoyerby¹,

Andersen

2009

IEEE Trans. Power Electron.

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Abstract-An important distortion mechanism in hysteretic selfoscillating (SO) class-D (switch mode) power amplifiers--carrier distortion--is analyzed and an optimization method is proposed. This mechanism is an issue in any power amplifier application where a high degree of proportionality between input and output is required, such as in audio power amplifiers or xDSL drivers. From an average-mode point of view, carrier distortion is shown to be caused by nonlinear variation of the hysteretic comparator input average voltage with the output average voltage. This easily causes total harmonic distortion figures in excess of 0.1-0.2%, inadequate for high-quality audio applications. Carrier distortion is shown to be minimized when the feedback system is designed to provide a triangular carrier (sliding) signal at the input of a hysteretic comparator. The proposed optimization method is experimentally proven in an audio power amplifier leading to THD figures that are comparable to the state of the art. Experimental hardware is a hysteretic SO bandpass current-mode-controlled single-ended audio power amplifier capable of 45 W into 8 Ω or 80 W into 4 Ω from a ±34 V supply with less than 0.03% THD from 100 Hz to 6.7 kHz. Carrier distortion is shown to account for this limitation in THD performance.

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Section: Hysteresis-based So Controllersmentioning

confidence: 99%

Carrier Distortion in Hysteretic Self-Oscillating Class-D Audio Power Amplifiers: Analysis and Optimization

Hoyerby¹,

Andersen

2009

IEEE Trans. Power Electron.

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“…The main objective of the converter controller is to regulate the capacitor (output) voltage to a desired value V ref . A sliding mode controller for such converter can be obtained by considering a sliding manifold consisting of a linear combination of the inductor current, weighted by a constant k 1 , and the integral of the output voltage error, weighted by a constant k 2 [11]. By choosing as state variables the time integral of the error between the output voltage and the reference voltage, say η 1 , the capacitor voltage, say η 2 , and the inductor current, say ξ, the controlled converter model can be represented as followṡ…”

Section: A Converter Controllermentioning

confidence: 99%

Experimental validation of dithered sliding mode control for switched systems

Frasca

Iannelli

Vasca

2006

2006 American Control Conference

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Boundary layer approach represents a classical solution for chattering mitigation in the implementation of sliding mode control systems. Dithering is here proposed as a technique for the regulation of the boundary layer in switched systems for which the natural on-off behaviour must be preserved. Power converters represent an interesting class of such systems. Experimental results on a DC/DC buck converter show that dither can play an important role for stability and robustness of the controlled converter. It is shown that dithering maintains the state of the system close to the ideal sliding manifold and that boundary layer and practical stability depend on the dither amplitude, period and shape.

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“…Over the past decade a large amount of literature has presented relevant research works on DC-DC converter controllers using the sliding mode algorithm [13][14][15][16][17][18][19][20][21][22][23][24]. The results have confirmed the strong robustness of the sliding mode control over the traditional linear PI control.…”

Section: Introductionmentioning

confidence: 97%

Super-Twisting Differentiator-Based High Order Sliding Mode Voltage Control Design for DC-DC Buck Converters

et al. 2016

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This paper aims to focus on the smooth output of DC-DC buck converters in wireless power transfer systems under input perturbations and load disturbances using the high-order sliding mode controller (HOSM) and HOSM with super-twisting differentiator (HOSM + STD). The proposed control approach needs only measurement of converter output voltage. Theoretical analysis and design procedures, as well as the super-twisting differentiator of the proposed controller are presented in detail with the prescribed convergence law of high-order sliding modes. Comparisons of both simulation and experimental results among conventional proportional-integral (PI) control, traditional sliding mode control (SMC), HOSM and HOSM + STD under various test conditions such as steady state, input voltage perturbations and output load disturbances, are presented and discussed. The results demonstrate and validate the effectiveness and robustness of the proposed control method.

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Implementing sliding mode control for buck converter

Cited by 56 publications

References 2 publications

Carrier Distortion in Hysteretic Self-Oscillating Class-D Audio Power Amplifiers: Analysis and Optimization

Carrier Distortion in Hysteretic Self-Oscillating Class-D Audio Power Amplifiers: Analysis and Optimization

Experimental validation of dithered sliding mode control for switched systems

Super-Twisting Differentiator-Based High Order Sliding Mode Voltage Control Design for DC-DC Buck Converters

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