AC-DC converters with high power factor by employing the Three-state switching cell

• Grant number: 19/18020-4
• Support Opportunities: Regular Research Grants
• Start date: December 01, 2019
• End date: May 31, 2022
• Field of knowledge: Engineering - Electrical Engineering - Power Systems
• Principal Investigator: Falcondes José Mendes de Seixas
• Grantee: Falcondes José Mendes de Seixas
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil
• Associated researchers: Douglas Carvalho Morais ; Lucas Carvalho Souza ; Luis Armando de Oro Arenas

Abstract

In this project, the main objective is to present the AC-DC converter structures acting as a power factor correction stage by using the three-state switching cell. This research has been slightly explored in the literature, allowing it to be combined with control strategies and/or techniques such as interleaving or bridgeless. The bridgeless technique has already been successfully explored by this research group in several boost converter topologies. In this manner, in this proposal, AC-DC converter structures are presented by using the three-state switching cell with regard to the active power factor correction. Firstly, the canonical cell concept and its operating characteristics are presented. Afterward, the three-state switching cell and its operating characteristics are studied, emphasizing the B configuration. The use of the three-state switching cell in power electronics converter has been very attractive in many applications, because of the stress current division in all semiconductors, equivalent to the half of the inductor current. Moreover, the ripple frequency of passive elements is equivalent to twice switching frequency established. Consequently, the design of input and output filters is simplified and, the weight and the volume of the structure are reduced. In addition, it is intended to construct prototypes to better detail the experimental results for CC-CC and power factor correction stages by using the three-state switch cell configurations type A and B. These prototypes would be built within the dissertation of the master student Lucas Souza, and the thesis of the student Douglas Carvalho, both researchers associated in this project. Finally, applications such as electric vehicle battery chargers, variable speed drives, aircraft rectification systems, among others, might be explored with the three-state switching cell concept. (AU)