Open AccessSingle‐phase hybrid discontinuous conduction mode SEPIC rectifiers integrated with ladder‐type switched‐capacitor cells
Author(s) -
Kremes William de J.,
Costa Paulo J.S.,
Illa Font Carlos H.,
Lazzarin Telles B.
Publication year - 2019
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2019.0119
Subject(s) - rectifier (neural networks) , inductor , capacitor , switched capacitor , voltage , pulse width modulation , topology (electrical circuits) , control theory (sociology) , computer science , electronic engineering , electrical engineering , engineering , control (management) , stochastic neural network , machine learning , artificial intelligence , recurrent neural network , artificial neural network
In this study, a set of new single‐phase pulse‐width modulation (PWM) Single‐ended primary‐inductor converter (SEPIC) rectifiers are proposed, which integrates conventional SEPIC rectifier, three‐state switch (TSS) and switched‐capacitor (SC) concepts. A conventional ladder‐type SC cell is modified so that it can be integrated with the SEPIC rectifier operating in discontinuous conduction mode. The set of new single‐phase PWM SEPIC rectifiers are able to provide: (i) lower‐voltage stress on the semiconductors; (ii) higher‐output voltage; and (iii) a split‐capacitor output voltage. The structure employs a TSS and three different implementations are proposed. Two of them are bridgeless versions, which can provide higher efficiencies. Hence, the proposed structures can support using the SEPIC rectifiers as step‐up in many applications and thus it can broaden its field of use. The topologies and their topological states, a theoretical steady‐state analysis, a theoretical analysis of the ladder‐type SC cell integrated with the SEPIC rectifier, a dynamic model for the control and a design example are discussed herein. Furthermore, a 500 W prototype with a 220 V input voltage, two 200 V split‐output voltages, 400 V total output voltage and 50 kHz switching frequency was designed to corroborate the theoretical study.