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Application of sliding-mode control to the design of a buck-based sinusoidal generator

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5 Author(s)
Biel, D. ; Dept. de ingenieria Electron, Escuela Univ. Politecnica de Bilanova i la Geltru, Spain ; Fossas, E. ; Guinjoan, F. ; Alarcon, E.
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This paper is devoted to the design of a sliding-mode control scheme for a buck-based inverter, with programmable amplitude, frequency, and DC offset, with no external sinusoidal reference required. A general procedure for obtaining an autonomous (time independent) switching surface from a time-dependent one is presented. For this surface, the system exhibits a zeroth-order dynamics in sliding motion. On the other hand, from the sliding-domain analysis, a set of design restrictions is established in terms of the inverter output filter Bode diagram and the output signal parameters (amplitude, frequency and DC offset), facilitating the subsequent design procedure. The control scheme is robust with respect to both power-stage parameter variations and external disturbances and can be implemented by means of conventional electronic circuitry. Simulations and experimental results for both reactive and nonlinear loads are presented

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Industrial Electronics, IEEE Transactions on  (Volume:48 ,  Issue: 3 )