Metodologia de projeto de filtros de emissão conduzida aplicada a conversores CA/CC monofásicos Maicon W. M. de Carvalho 1,* , Djonny Weinzierl 1 , Sérgio V. G. Oliveira 1,2 1 Universidade do Estado de Santa Catarina, Programa de Pós-Graduação em Engenharia Elétrica, Santa Catarina, Brasil 2 Universidade Regional de Blumenau, Departamento de Engenharia de Telecomunicações, Elétrica e Mecânica, Santa Catarina, Brasil

Metodologia de projeto de filtros de emissão conduzida aplicada a conversores CA/CC monofásicos Maicon W. M. de Carvalho1,*, Djonny Weinzierl1, Sérgio V. G. Oliveira1,2 1

 Universidade do Estado de Santa Catarina, Programa de Pós-Graduação em Engenharia Elétrica, Santa Catarina, Brasil 2 Universidade Regional de Blumenau, Departamento de Engenharia de Telecomunicações, Elétrica e Mecânica, Santa Catarina, Brasil 

 ABSTRACT Electromagnetic interference filter design specifies circuit topology and elements, inductors, and capacitors of an electrical network whose purpose is to reduce interferential signals. This work presents an iterative methodology of EMI filter design for switched power supplies based on the sequential element theorem and the concept of the dominant effect in electromagnetic compatibility. This design methodology was proposed based on experiments with three commercial off-the-shelf power supplies and knowledge about common, differential, and mixed-mode emissions, as well as the non-idealities of the elements and the power supply's input impedance characteristics. In practical tests, the effect of the EMI filter resonance and the power supply's mixed-mode input impedance was observed, which served as a guideline for determining which component should be included or whether its value should be increased in the EMI filter structure. The most restrictive requirements were met with a few iterations and fewer components than the original filters, demonstrating that the concepts used as a reference are valid and valuable.

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 https://www.scielo.br/j/epot/a/jv5BnWGMCmZ9DGkDxR9Gcbq/?format=pdf&lang=pt

Electronic Load for Parameter Characterization in Equivalent Circuit Models of Lithium-Ion Batteries-Suelen Bampi 1,* , Gierri Waltrich 1 , Anderson Vaccari 2 1Federal University of Santa Catarina, Postgraduate Program in Electrical Engineering, Florianopolis - SC, Brasil. 2Vale S.A, Development and Innovation Sector, Vila Velha - ES, Brasil.

 Electronic Load for Parameter Characterization in Equivalent Circuit Models of Lithium-Ion Batteries Suelen Bampi1,*, Gierri Waltrich 1, Anderson Vaccari2 1 Federal University of Santa Catarina, Postgraduate Program in Electrical Engineering, Florianopolis - SC, Brasil. 2 Vale S.A, Development and Innovation Sector, Vila Velha - ES, Brasil. 

 ABSTRACT The applications and implemented volume of lithium-ion batteries have been gaining momentum each year. Aiming to contribute to the development of research in this area, this paper presents the design and implementation of an electronic load focused on characterizing parameters inherent to equivalent circuit models (ECM). ECMs are commonly applied for estimating the State of Charge (SoC), State of Health (SoH), and Remaining Useful Life (RUL) of lithium batteries. In this paper, an electrical design of an electronic load was implemented and validated through laboratory instrumentation to obtain characteristic data from a lithium titanate cell. The data from the tests performed on the cell were used as input for a SoC estimation algorithm based on the Extended Kalman Filter (EKF) to help corroborate the prototype's performance. The results comprise the performance of the electronic load, the results associated with the parameterization tests of the lithium cells, and the results obtained for the cell’s SoC estimation using the EKF.

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https://www.scielo.br/j/epot/a/ZShrcqBM9QL6k33XyFSLSFj/?format=pdf&lang=en

Analysis and Implementation of a Single-Phase Bridgeless Hybrid Switched-Capacitor Rectifier in Discontinuous Conduction Mode for Power Factor Correction-

 

Analysis and Implementation of a Single-Phase Bridgeless Hybrid Switched-Capacitor Rectifier in Discontinuous Conduction Mode for Power Factor Correction

 Chrystian Mumic 1,∗, Marcus V. Soares 2, Yales R. de Novaes 1, Alan J. Watson 3 1Santa Catarina State University, Dept of Electrical Engineering, Joinville, Brazil. 2Silicon Austria Labs, Division Power Electronics, Graz, Austria. 3University of Nottingham, Dept. Electrical and Electronic Engineering, Nottingham, United Kingdom.

ABSTRACT 

This work presents the quantitative and qualitative analysis, as well as the experimental results of a practical implementation of the Single-Phase Bridgeless Hybrid Switched Capacitor Rectifier operating in discontinuous conduction mode (DCM) to achieve a high input power factor. Operating in DCM provides several advantages, including natural power factor correction (PFC) behavior of the input current and reduced semiconductor switching losses. The paper begins with a literature review on key studies of hybrid switched-capacitor converters with a high power factor. Subsequently, the converter analysis, including its modulation scheme, operational stages and design methodology, is detailed. The proposed approach is validated with results from a practical prototype implementation, achieving an output voltage of 1200 V and an output power of 315 W from an input voltage of 220 V. The converter demonstrated an efficiency of 97.3%, a power factor of 0.99, and harmonic distortion levels within the limits specified by IEC61000-3-2.

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https://www.scielo.br/j/epot/a/5y7jTFXzM53WrZB7W5zKdWP/?format=pdf&lang=en

UAPFs topologies with UPS features for low and medium voltage applications-Welflen Ricardo Nogueira Santos1 , Eisenhawer de Moura Fernandes2, Edison Roberto Cabral da Silva2, Marcus Andre Barros Nogueira Carneiro1, Antonio Airton Carneiro de Freitas1, Patryckson Marinho Santos3

 

UAPFs topologies with UPS features for low and medium voltage applications 

 Welflen Ricardo Nogueira Santos1 , Eisenhawer de Moura Fernandes2, Edison Roberto Cabral da Silva2, Marcus Andre Barros Nogueira Carneiro1, Antonio Airton Carneiro de Freitas1, Patryckson Marinho Santos3 1Electrical Engineering Department, Federal University of Piauí, Campus Universitário Ministro Petrônio Portella, s/n Bairro Ininga, 64049-550, Teresina – PI, Brazil 2Mechanical Engineering Department, Federal University of Campina Grande, R. Aprígio Veloso, 882 – Universitário, 58429-900, Campina Grande – PB, Brazil 3Electrical Engineering Department, Federal University of Maranhão, Av. dos Portugueses, 1966 – Vila Bacanga, 65080-805, São Luís – MA, Brazil

 Abstract: Some configurations of universal active power filter (UAPF) with uninterruptible power supplies (UPSs) features for single-phase applications are proposed in this study focus on a reduced number of power electronic switches. All proposed configurations, composed by two-leg converters, compensate for current and voltage harmonics and provide power factor control close to one. Comparisons between the structures are made in terms of converters voltage capabilities, shared-leg, and capacitor currents. The model of the systems, including the equations and control system, is detailed described. Steady-state analysis of the proposed configurations demonstrates the existence of a load angle, which reduces the converters current, increasing the efficiency of the proposed systems. A complete set of simulated and experimental results are presented. 

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https://www.academia.edu/27448011/A_Novel_AC_UPS_With_High_Power_Factor_and_Fast_Dynamic_Response?email_work_card=view-paper 

YAKOVLEV,Streklov, El'stin, Khaikin - Problems in Undergraduate Physics Volume II Electricity and Magnetism

 

This set of four books of problems is based on a translation of a Russian collection which has been in use by students in physics at Moscow State University and the Moscow Physico-Technical In­stitute for a number of years. Where appropriate, answers and solutions to the problems are given in the second part of each volume.

VIEW BOOK : https://archive.org/details/problems-in-undergraduate-physics-volume-ii-electricity-and-magnetism