Marc Kanzian, Matteo Agostinelli, Mario Huemer,
"Digital hysteresis sliding mode control for interleaved DC?DC converters"
, in Control Engineering Practice, Vol. 90, Elsevier, Seite(n) 148-159, 9-2019, ISSN: 0967-0661
Digital hysteresis sliding mode control for interleaved DC?DC converters
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This paper presents a digital constant frequency sliding mode control (SMC) law for interleaved DC?DC converters. Constant switching frequency and interleaving are achieved by dynamically adjusting the hysteresis of the control signals generating comparators. The interleaving method neither imposes constraints on the number of required phases to obtain a specific output voltage nor uses quasi-SMC. Hence, the control scheme
achieves high flexibility, robustness, and performance. Furthermore, a sliding mode observer (SMO) for reconstructing the inductor currents is proposed. Experimental results for a two-phase buck converter are reported. The control concept accomplishes an improved dynamic performance in comparison with quasi-SMC.