I. Barbi

Federal University of Santa Catarina, Nossa Senhora do Destêrro, Santa Catarina, Brazil

Are you I. Barbi?

Claim your profile

Publications (277)373.44 Total impact

  • L.F. Costa, S.A.Mussa, I.Barbi
    IEEE Transactions on Industry Applications 11/2014; DOI:10.1109/TIA.2014.2313715 · 2.05 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents the derivation, the analysis, and the experimentation of a family of unidirectional three-level PFC rectifiers, based on pulse-width-modulated hybrid switched capacitor principle. The topologies feature reduced voltage stress across the switches, low number of switches, control of the output voltage, and high-voltage gain without the utilization of transformers. Experimental results for a laboratory prototype of 220 ${bf V}_{{bf rms}}$ to 1600 ${bf V}_{{bf dc}}$ voltages and nominal power of 2500 W are included in the paper, to validate the theoretical analysis, where the measured maximum efficiency reached 97.91%. The proposed converters are suitable for applications that require rectification with unity power factor and high-voltage gain.
    IEEE Transactions on Power Electronics 09/2014; 30(8). DOI:10.1109/TPEL.2014.2360173 · 5.73 Impact Factor
  • Gleyson Luiz Piazza, Ivo Barbi
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper introduces a new dc–ac converter with the feature that it produces an instantaneous output voltage higher or lower than the input dc voltage without an intermediate power stage or transformers. This feature is provided by using one switching cell including two switches, two diodes, one inductor, and one capacitor on each inverter leg. Validating the theoretical analysis, a prototype was designed, built, and tested for an output rated power of 1 kW, a dc input voltage of 96V$_{rm dc}$, and output voltage of 110 V$_{rm rms}$. Furthermore, the fundamental output frequency was established at 60 Hz and the switching frequency at 20 kHz.
    IEEE Transactions on Power Electronics 09/2014; 29(9):4512-4520. DOI:10.1109/TPEL.2013.2277961 · 5.73 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Automotive embedded electronic systems have been increasing in power and complexity and, therefore, more advanced power electronic converters are necessary in these vehicles. Several dual voltage (42V/14V) bidirectional converter architectures have been proposed for automotive systems in recent years. However, most of them, or have low efficiency or are based in series and parallel configurations with large number of semiconductors and magnetics devices. Therefore, in this paper is proposed a bidirectional highefficiency converter with lower number of components. This converter was created by merging a switched capacitor converter and a conventional bidirectional converter, resulting in a hybrid topology. The voltage across the semiconductors of the proposed converter is equal to half of the highest voltage source value. Furthermore, the topology is composed of only one inductor to control the power flow between the two voltage sources. To verify all the mentioned features, a prototype was implemented experimentally, reaching a maximum efficiency of 97.5%.
    IEEE Transactions on Industrial Electronics 08/2014; PP(99). DOI:10.1109/TIE.2014.2350454 · 6.50 Impact Factor
  • Source
  • Gabriel Tibola, Ivo Barbi
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents the analysis and design of a three-phase high power factor rectifier, based on the dc-dc single-ended primary-inductance converter (SEPIC) operating in discontinuous conduction mode, with output voltage regulation and high frequency isolation. The input high power factor is naturally attained through the operational mode without the use of current sensors and a current control loop. To validate the theoretical analysis, a design example and experimental results for a 4-kW, 380-V line-to-line input voltage, 400-V output voltage, 0.998 power factor, 40-kHz switching frequency, and 4% input current total harmonic distortion laboratory prototype are presented, considering two distinct modulators. In addition, experimental results for the output voltage closed-loop control are presented.
    IEEE Transactions on Power Electronics 11/2013; 28(11):4962-4969. DOI:10.1109/TPEL.2013.2247775 · 5.73 Impact Factor
  • Adriano Ruseler, Ivo Barbi
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper proposes an isolated bidirectional dc-dc converter, based on the duality between Zeta and SEPIC converters. Active-clamping is used to recycle the energy trapped in the transformer leakage inductance and to protect the power semiconductors against over-voltages. Theoretical analysis, modulation strategy and experimental results are included in the paper. A laboratory prototype, rated at 1kW, with an input voltage of 100 V, an output voltage of 133 V and 50 kHz of switching frequency validates the predicted theoretical results. The proposed converter is suitable for several practical applications such UPS, electric vehicle, energy storage end smart grids.
    Power Electronics Conference (COBEP), 2013 Brazilian, Gramado, Brazil; 10/2013
  • [Show abstract] [Hide abstract]
    ABSTRACT: Switched-capacitor (SC) converters - mainly non-isolated DC-DC converters - have been a very important research topic for many years. Recently, switched capactitors have also been applied in direct AC-AC conversion, and studies have presented two different bidirectional SC ac-ac converters, which intended to replace the conventional auto-transformer in commercial and residential applications. The analysis of one of the presented converters shows that, by sacrificing the bidirectionality, the circuit can be shortened, resulting in a reduction of its overall cost and size. The proposed change modifies the behavior of the converter in each operational stage, thus a new analysis is needed. Therefore, this paper studies, describes, analyzes, designs and tests the proposed new topology. The paper also compares the new converter with the previous topology and presents its advantages, disadvantages and applications. In order to demonstrate the performance of that converter, the design example and experimental results of a prototype of 1 kW, 220/110 V input/output voltages, and switching frequency of 100 kHz, are reported herein. The maximum and nominal efficiencies shown by the prototype were 97.6% and 96.1%, respectively.
    2013 Brazilian Power Electronics Conference (COBEP 2013); 10/2013
  • [Show abstract] [Hide abstract]
    ABSTRACT: This work approaches the subject of Active Power Filtering for the cases where the current stress of the semiconductor devices is a point of major concern. Instead of the classic parallelism of inverters, a topology with coupled inductors is proposed to address this problem. In addition this topology provides advantages from the point of view of the output current ripple, providing more flexibility on the design of the filter inductors. A more simple and cost-effective control strategy based on the sensing of the AC source currents is implemented using the Park transformation. Simulation and practical experiments are presented in order to prove the correct behavior of the system. The experimental set-up consists on a non-linear load rated for 8 kVA connected to a 380 V (line-to-line) AC grid, trough an isolation transformer. A Four States Commutation Cell, DC-AC Converter is connected as a shunt Active Power Filter with a DC link voltage of 600 V. The control algorithm is programmed on a DSP board TMS320F28335 from Texas Instruments.
    Power Electronics Conference (COBEP), 2013 Brazilian; 10/2013
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents an complete investigation of an active capacitor voltage balancing strategy for multilevel dc-dc converter. The proposed technique may be applied to various dc-dc converters, such as the well-known flying-capacitor converter. The voltage balancing analysis is carried out for a five level dc-dc converter, in which the small-signal modeling is realized. The obtained converter mathematical model presents cross-coupling among the variables, as well as the dependence of the load current. Thus, a control strategy is proposed in this paper, in which incorporates a decoupling action. Besides that, a feedforward technique is used to eliminate the dependence of load current of the converter model, improving the performance of the closed loop system in light load. In order to demonstrate the performance of proposed capacitor voltage balancing control loop, it was applied to a 5-level dc-dc converter and experimental results are reported herein. The results attest the advantages of the proposed capacitor voltage balancing control.
    2013 Brazilian Power Electronics Conference (COBEP 2013); 10/2013
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents the study of a single-stage, single-phase, unity power factor converter, isolated by a high frequency transformer, based on a Zeta converter operating in discontinuous conduction mode (DCM). The main feature of the proposed converter is its ability to naturally emulate an apparent resistance to the ac input source, without current sensor or current controller. Circuit operation, theoretical analysis and design example are included in this paper, along with experimental results taken from a laboratory prototype rated at 400W, input voltage equal to 127 V, output voltage equal to 200 V, switching frequency of 25 kHz and efficiency of 92%. In order to reduce the commutation losses and limit the peak voltage across the power semiconductors, a non-dissipative snubber has been included in the laboratory prototype. With the advent of new power semiconductor technologies, such as SiC and GaN, power converters operating in DCM will become very attractive, due to their simplicity and robustness, even for high power applications. This is the main motivation of the study presented hereafter.
    2013 Brazilian Power Electronics Conference (COBEP 2013); 10/2013
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper proposes a new ac-ac static power converter based on the switched-capacitor (SC) principle, intended to replace the conventional autotransformer in commercial and residential applications. The principle of operation, a qualitative and quantitative analysis, the design methodology, and an example are described in this paper. The main advantages of the proposed ac-ac converter are the absence of magnetic elements, the stress voltages in all components being equal to half of the high-side voltage, the common reference between input and output voltages, the employment of a single SC leg, the ability to be bidirectional, the high efficiency, and the high power density. In order to demonstrate the performance of this converter in the laboratory, a prototype of 1-kW, 220-Vrms high-side voltage, 110-Vrms low-side voltage, and switching frequency of 100 kHz was designed and fabricated. The relevant experimental results are reported herein. The maximum and rated power efficiencies obtained in the laboratory were 98% and 96%, respectively.
    IEEE Transactions on Power Electronics 07/2013; 28(7):3329-3340. DOI:10.1109/TPEL.2012.2222674 · 5.73 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper describes a theoretical and experimental study on a control strategy for the parallel operation of single-phase voltage source inverters (VSI), to be applied to uninterruptible power supply. The control system for each inverter consists of two main loops, which both use instantaneous values. The first (parallelism control) employs the feedback of the inductor current from the output filter to modify the input voltage of the same filter and, therefore, to control the power flow of each inverter to the load. Additionally, the second loop (voltage control) is responsible for controlling the output voltage of the LC filter, which coincides with the output voltage of the VSI. Due to the fact that there is no exchange of information among the VSIs regarding their operation points, it is easier to obtain redundant systems. Furthermore, the connection (or disconnection) of inverters in a parallel arrangement is carried out directly, without connection impedance, and can occur at any operation point of the system. The proposed control strategy ensures the proper sharing of the load current and avoids current circulation among the inverters during transient and steady-state operation. Moreover, its design and implementation are very simple. The control technique was verified through experimental results with a maximum load of 10 kVA supplied by three parallel-connected inverters.
    IEEE Transactions on Industrial Electronics 06/2013; 60(6):2194-2204. DOI:10.1109/TIE.2012.2193856 · 6.50 Impact Factor
  • T.B. Lazzarin, Ivo Barbi
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper describes a theoretical and experimental study on a control strategy for the parallel operation of three-phase voltage source inverters (VSI), to be applied to UPS. The proposed control system for each inverter consists of two main loops, which both use instantaneous values. The first (parallelism control) employs the feedback of the inductor currents from the output filter to modify the input voltages of the same filter and thereby control the power flow of each VSI to the load. Additionally, the second loop (voltage control) is responsible for controlling the output voltages of the LC filter, which coincides with the output voltages of the VSI. The proposed control strategy ensures the proper sharing of the load current and avoids current circulation among the inverters during transient and steady-state operation. The VSI and the proposed control strategy are analyzed in an orthogonal (αβ) stationary frame, and as a result, simple and effective models were achieved. The proposed control system was digitally implemented in a TMS320F2812 DSP and was verified through experimental results with a 10 kVA prototype, which has the parallel operation of two three-phase VSIs.
    IEEE Transactions on Industrial Informatics 05/2013; 9(2):749-759. DOI:10.1109/TII.2012.2223477 · 8.79 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper a step-up/step-down isolated dc–dc converter referred to as a three-phase flyback push–pull dc–dc converter is presented. The power circuit is constituted by a pair of coupled inductors, a three-phase transformer, a capacitor, three switching transistors and three power diodes. The proposed converter offers the advantages of compact passive devices, low conduction power losses, full duty cycle range (0–100%), and inherent protection against transformer saturation. Furthermore, filter sizes are minimized to duty cycles of around 1/3 and 2/3. These characteristics makes this converter suitable for many applications, especially in low-voltage high-power applications such as telecommunications power supply, battery chargers, and renewable power systems. The operating principle and the idealized mathematical analysis in continuous conduction mode are presented. Experimental data were obtained from a laboratory prototype with an input voltage of 125 V, output voltage of 100 V, load power of 1000 W, and switching frequency of 42 kHz. The measured prototype efficiency was 94% for full load and 96% for 400 W.
    IEEE Transactions on Power Electronics 04/2013; 28(4):1961-1970. DOI:10.1109/TPEL.2012.2211037 · 5.73 Impact Factor
  • L.F. Costa, S.A. Mussa, I. Barbi
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents a nonisolated multilevel step-up dc-dc converter suitable for high power and high output voltage application. The main features of proposed converter are: reduced voltage across the semiconductors; low switching losses; and reduced volume of input inductor. This paper focuses on the five-level structure of the proposed converter, in which the theoretical analysis is carried out and discussed. The five-level proposed dc-dc converter has four capacitors and their voltages should be balanced for its correct operation. Therefore, a capacitor voltage balancing active control is presented and analyzed in detail herein. In order to demonstrate the performance of this converter, experimental results were obtained for an output power of 5kW. The results attest the advantages of the proposed dc-dc topology and it is reported herein.
    Power Electronics and Applications (EPE), 2013 15th European Conference on; 01/2013
  • L.F. Costa, S.A. Mussa, I. Barbi
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents a nonisolated multilevel buck+boost dc-dc converter suitable for high voltage and high power application. It is composed by a Buck-type and a Boost-type converters, both multilevel and bidirectional. The main features of proposed converter are: reduced voltage stress across the semiconductors, allowing its use in high voltage; bidirectional power flow; frequency operation of the inductor is a multiple of the switching frequency, reducing the volume of magnetic component. This paper focuses on the five-level structure of the proposed converter, in which the theoretical analysis is carried out and discussed. In order to validate the theoretical analysis, a prototype with 10 kW output power capability, 1 kV to 750 V input-to-output voltage and 20 kHz of switching frequency was constructed and experimented. The results attest the advantages of the new dc-dc topology and it is reported herein.
    Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE; 01/2013
  • [Show abstract] [Hide abstract]
    ABSTRACT: This letter proposes an ac-ac converter based on the switched-capacitor principle. The new topology is described, analyzed, designed, and tested in the laboratory. The converter characteristics at the frequency of the input voltage and at the switching frequency are described herein. The absence of magnetic elements and the stress voltages in all components equal to half the input voltage are the main advantages of the proposed ac-ac converter. In order to demonstrate the performance of this converter a design example and experimental results for a prototype of 600 W, 220 Vrms high-side voltage, 110 Vrms low-side voltage, and switching frequency of 50 kHz are reported herein. The maximum and nominal efficiencies obtained were 95.6% and 90.6%, respectively.
    IEEE Transactions on Power Electronics 12/2012; 27(12):4821-4826. DOI:10.1109/TPEL.2012.2203318 · 5.73 Impact Factor

Publication Stats

4k Citations
373.44 Total Impact Points

Institutions

  • 1989–2013
    • Federal University of Santa Catarina
      • • Departamento de Engenharia Elétrica
      • • Instituto de Eletrônica de Potência (INEP)
      Nossa Senhora do Destêrro, Santa Catarina, Brazil
  • 1999–2011
    • Universidade Regional de Blumenau
      Blumenau, Santa Catarina, Brazil
    • Federal University of Juiz de Fora
      Juiz de Fora, Minas Gerais, Brazil
  • 2010
    • University of Antofagasta
      Antofagasta, Antofagasta, Chile
  • 2007
    • École Polytechnique Fédérale de Lausanne
      • Industrial Electronics Laboratory
      Lausanne, Vaud, Switzerland
  • 2006
    • FEPI - Centro Universitário de Itajubá
      Itajubá, Minas Gerais, Brazil
    • CEP America
      Emeryville, California, United States
  • 2005
    • Centro Universitário - Católica de Santa Catarina
      Joinville, Santa Catarina, Brazil
  • 1999–2005
    • Universidade Federal do Ceará
      • Departamento de Engenharia Elétrica
      Ceará, Ceará, Brazil
  • 1991–2004
    • São Paulo State University
      San Paulo, São Paulo, Brazil
    • Universidade Federal da Bahia
      Bahia, Estado de Bahía, Brazil
  • 2003
    • Instituto Nacional de Estudos e Pesquisas Educacionais Anísio Teixeira Página Inicial
      Brasília, Federal, Brazil
  • 2002
    • Instituto Tecnólogico Superior de Teziutlán
      Teziutlán, Puebla, Mexico
  • 1997–2002
    • Universidade Católica de Pelotas (UCPel)
      São Francisco de Paula, Rio Grande do Sul, Brazil
    • University of the West of Santa Catarina
      Nossa Senhora do Destêrro, Santa Catarina, Brazil
  • 2001
    • University of São Paulo
      San Paulo, São Paulo, Brazil
    • Sociedade Educacional de Santa Catarina (SOCIESC)
      Joinville, Santa Catarina, Brazil
    • Pontifical Catholic University of Argentina
      Buenos Aires, Buenos Aires F.D., Argentina
  • 1999–2001
    • Eawag: Das Wasserforschungs-Institut des ETH-Bereichs
      Duebendorf, Zurich, Switzerland
  • 1995–1999
    • Los Andes University (Colombia)
      Μπογκοτά, Bogota D.C., Colombia
  • 1998
    • Centro Universitário do Espírito Santo
      Collatina, Espírito Santo, Brazil
    • University of the Free State
      Bloemfontein, Orange Free State, South Africa
  • 1996–1997
    • Universidade Federal do Paraná
      • Departamento de Engenharia Elétrica
      Curitiba, Estado do Parana, Brazil
    • University of the Andes (Venezuela)
      Mérida, Mérida, Venezuela
  • 1993–1995
    • Universidade Federal de Santa Maria
      Santa Maria da Boca do Monte, Rio Grande do Sul, Brazil
  • 1991–1993
    • Universidade Federal do Espírito Santo
      Victoria, Espírito Santo, Brazil