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This paper presents an improved direct power control (DPC) strategy based on sliding mode control (SMC) with dual-closed-loop for the Vienna-type rectifiers to improve dynamic response during both start-up and load step change periods and guarantee better performances in steady state. The SMC based DPC methodology can directly regulate the instantaneous active and reactive powers without transforming...
This paper presents an improved nonlinear voltage outer-loop and current inner-loop control scheme for three phase Vienna-type rectifier, which adopted the sliding mode controller (SMC) for the outer dc voltage loop and utilized the predictive current controller (PCC) for the current inner-loop. Compared with the conventional PI, the SMC can highly enhance the dynamic performance and robustness of...
This paper presents a simplified SVM for Vienna-type rectifier which is based on the space vector modular of a three-level converter into a two-level converter, the dwelling time calculation and switching sequence selection are easily done like conventional two-level rectifier, which is discussed in detail in this paper. Meanwhile, based on inherent correlation between carrier-based PWM and SVM for...
With the development of electronic technology, multi-output power supplies with different output voltage levels and load capacities are required, and using multi-output DC/DC converters is an effective and economical method. In this paper, the cross regulation of multi-output converters is analyzed in theory, and the coupling relations of different outputs are also deduced, and then a kind of post...
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