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AC-DC-AC Three-Phase Converter Based on Three Three-Leg Converters Connected in Series

AC-DC-AC Three-Phase Converter Based on Three Three-Leg Conv...

引用

IEEE Energy Conversion Congress and Exposition

作者： Nustenil S. M. L. Marinus Cursino B. Jacobina Nady Rocha Euzeli C. dos Santos Federal Institute of the Ceara Campus Cedro Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Electrical Engineering Department (DEE) Federal University of Campina Grande (UFCG) 58109-970 Campina Grande - PB - Brazil Electrical Engineering Department (DEE) Federal University of Paraiba (UFPB) 58051-900 Cidade Universitaria - Joao Pessoa - PB - Brazil Indiana University-Purdue University Indianapolis

ISBN: (纸本)9781479957774

An unidirectional three-phase to three-phase dc-link converter is proposed, in this paper. It is composed of three unidirectional ac-dc-ac three-leg converters with a shared-leg. The three-leg converter is composed of a non-controlled leg, two controlled legs and a dc-link. A suitable model and control strategy of the systems, including a synchronization method, are proposed. The synchronization method, associated with the PWM strategy allow the grid currents and load voltages have the same phase angle of the input converter voltages. This method ensures sinusoidal grid currents and mitigate the zero-crossing distortions normally caused by the use of diodes. Simulation and experimental results are also presented for validation purposes.

关键词： Topology Capacitors Voltage control Synchronization Legged locomotion Harmonic analysis Load modeling

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Open-end multi-level six-phase machine drive system with three three-phase DC-link converters

Open-end multi-level six-phase machine drive system with thr...

引用

Annual Conference of Industrial Electronics Society

作者： A. C. N. Maia C. B. Jacobina N. B. Freitas Post-Graduate Program in Electrical Engineering – PPgEE Federal University of Campina Grande (UFCG) Campina Grande PB Brazil Federal Institute of Alagoas (IFAL) Palmeira dos Indios AL Brazil

A novel multi-level AC six-phase motor drive is developed in this paper. The scheme is based on three conventional 2-level three-phase voltage source inverters (VSIs) supplying the open-end windings of a dual three-phase motor (six-phase induction machine). The proposed inverter is capable of supply the machine with multi-level voltage waveforms. The developed system is compared with the conventional solution and it is demonstrated that the drive system permits to reduce the harmonic distortion of the machine currents, to reduce the total semiconductor losses and to decrease the power processed by converter switches. The system model and the Pulse-Width Modulation (PWM) strategy are presented. The experimental verification was obtained by using IGBTs with dedicated drives and a digital signal processor (DSP) with plug-in boards and sensors.

关键词： Topology Inverters Pulse width modulation Harmonic distortion Switching loss Motor drives Switching frequency

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Distributed approach for channel quality estimation using dedicated nodes in industrial WSN

Distributed approach for channel quality estimation using de...

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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Ruan D. Gomes Gláucio B. Rocha Abel C. Lima Filho Iguatemi E. Fonseca Marcelo S. Alencar Informatic Coordination Federal Institute of Paraíba Guarabira Paraíba Brazil Informatic Center Federal University of Paraíba João Pessoa Paraíba Brazil Mechanical Engineering Department Federal University of Paraíba João Pessoa Paraíba Brazil Post-Graduate Program in Electrical Engineering - PPgEE - Copele Campina Grande Paraíba Brazil

ISBN: (纸本)9781479949113

A way to deal with the variations in the link quality of Wireless Sensor Networks (WSN) is the use of strategies for Dynamic Channel Allocation (DCA). The first step to perform DCA is estimating the channel quality, so that the network nodes can decide if a channel change is needed, and the best channel to be used. This paper proposes a distributed approach with nodes dedicated to monitor channel quality, by using the Received Signal Strength Indication (RSSI) and the Link Quality Indicator (LQI) to identify low quality channels. This approach is acceptable in industrial WSN, since the network deployment can be performed with adequate planning. Furthermore, the sensor nodes do not need to stop their operation for monitoring the channel quality. As a first step, experiments were performed in a real industrial environment to identify the relation between RSSI and LQI traces, and the Packet Error Rate for different channels, by using IEEE 802.15.4 radios operating in the 2.4 GHz band.

关键词： Interference Wireless sensor networks Channel estimation Measurement Transceivers Monitoring IEEE 802.15 Standards

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AC-DC-AC nine-phase machine drive system based on H-bridges and three-leg converters

AC-DC-AC nine-phase machine drive system based on H-bridges ...

引用

Annual Conference of Industrial Electronics Society

作者： Victor F. M. B. Melo Cursino B. Jacobina Edgar R. Braga-Filho Rodolpho M. Cavalcanti Isaac S. de Freitas Roberto S. Macena Gregory A. de A. Carlos Post-Graduate Program in Electrical Engineering PPgEE - COPELE - UFCG Federal University of Campina Grande UFCG Campina Grande Paraíba Brazil Federal University of Paraiba UFPB Joao Pessoa Paraíba Brazil Federal Institute of Technology of Sergipe IFSE Estancia Sergipe Brazil Universidade Federal de Campina Grande Campina Grande PB BR

This paper presents an ac-dc-ac reversible nine-phase machine drive system. The grid side converter is composed of Y-connected single-phase bridges. As the machine is composed of three three-phase groups, a three-leg converters are connected separately to each group. The topology does not make use of input isolation transformers and reduces the power processed by converter switches when compared to that of conventional two-level converter. Moreover, harmonic distortion in voltages generated by the grid side converter is reduced when compared to conventional two-level converter. The model and the control strategy have been developed. Simulation and experimental results are also presented.

关键词： Inverters Topology Harmonic distortion Pulse width modulation Voltage control Rotors Capacitors

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Three-Phase shunt active power filter based on the interconnection of single-Phase and three-Phase converters

Three-Phase shunt active power filter based on the interconn...

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2013 12th Brazilian Power Electronics Conference, COBEP 2013

作者： Maciel, A.M. Jacobina, C.B. Melo, V.B. Dos Santos, E.C. Fabricio, E.L.L. Post-Graduate Program in Electrical Engineering -PPgEE -COPELE Brazil 58429-900 Campina Grande -PB Brazil -PB Brazil Department of Electrical and Computer Engineering Purdue School of Engineering and Technology IUPUI United States

ISBN: (纸本)9781479902729

This paper presents a topology based on the interconnection of single-phase H-bridge converters and a three-phase converter acting as a shunt active power filter. Contributions for the model, PWM approach and control strategies are presented to the studied converter. As compared to the conventional solution by using just H-bridges converters, the proposed one reduces the number of semiconductor and storage devices while keeping the same characteristics of high number of levels. A comprehensive THD analysis will be considered followed by simulated and experimental outcomes. © 2013 IEEE.

关键词： Bandpass filters

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SIX-PHASE MACHINE DRIVE SYSTEM BASED ON THREE THREE-LEG CONVERTERS

SIX-PHASE MACHINE DRIVE SYSTEM BASED ON THREE THREE-LEG CONV...

引用

Brazilian Power Electronics Conference

作者： A. C. N. Maia C. B. Jacobina Federal University of Campina Grande (UFCG) Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Electrical Engineering Department (DEE)

ISBN: (纸本)9781479902712

In this paper, a six-phase machine drive system fed by a nine-leg converter is proposed. The drive system is composed of a three three-leg inverters feeding a six-phase induction motor, which is adequate to develop a high power system with voltage rating restrictions. The studied system is compared to the conventional solution and it is demonstrated that the nine-leg converter permits to reduce the harmonic distortion of the machine currents and to decrease the power processed by converter switches. The system model and the PWM strategy are presented. Experimental results demonstrate the feasibility of the proposed system.

关键词： Harmonic Distortion Motor Drive System Ratings of Switches Semiconductor Losses Six-Phase Machine Three-leg Converters

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AC-DC-AC Six-Phase Machine Drive System Based on Single-Phase Bridge Converters

AC-DC-AC Six-Phase Machine Drive System Based on Single-Phas...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Victor F. M. B. Melo Cursino B. Jacobina Nady Rocha Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Electrical Engineering Department - Federal University of Campina Grande - UFCG Federal University of Paraiba - UFPB

ISBN: (纸本)9781479902255

This paper presents an ac-dc-ac reversible six-phase machine drive system. It is composed of single-phase bridge converters connected in series in the grid side and single-phase bridge converters connected at the machine phase terminals. The proposed topology eliminates the input isolation transformers and reduces the power processed by converter switches and the harmonic distortion in the grid side. The model and the control strategy have been developed. Simulation and experimental results are presented.

关键词： Ac-dc-ac converters Six-phase machine drive Series-connected converters

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Modeling and control of the modular multilevel cascade converter based on chopper-cells

Modeling and control of the modular multilevel cascade conve...

引用

Brazilian Power Electronics Conference, COBEP

作者： B. E. O. B Luna C. B. Jacobina A. C. Oliveira Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Electrical Engineering Department (DEE) Federal University of Campina Grande (UFCG) PB Brazil

This paper presents the modular multilevel cascade converter (MMCC) based on chopper-cells suitable to medium and high voltage systems without line-frequency transformers. This converter is characterized by a modular arm structure composed by cascaded chopper-cells with floating dc capacitors. The arm structure requires average voltage control and voltage-balancing control of the dc capacitors. This paper proposes a continuous model and a control method to achieve rigid and stable voltage control of all the floating dc capacitors under common operating conditions. The validity of the theory is confirmed by computer simulation and experiment.

关键词： Capacitors Voltage control Power harmonic filters Harmonic analysis Equations Pulse width modulation Mathematical model

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A fast space-vector algorithm for common-mode voltage elimination in multilevel converters

A fast space-vector algorithm for common-mode voltage elimin...

引用

Brazilian Power Electronics Conference, COBEP

作者： Luis G. G. P. de Castro Maurício B. R. Corrêa Cursino B. Jacobina Post-Graduate Program in Electrical Engineering - PPgEE- COPELE Electrical Engineering Department (DEE) Federal University of Campina Grande Campina Grande PB Brazil

This paper presents an approach that allows to apply space-vector modulation strategy to eliminate common-mode voltage in multilevel inverters. The strategy is based on the reduction of the space vector diagram and on the choice of switching states in which the common-mode voltage is zero. Results were obtained with a real-time simulator and an experimental platform of a cascaded inverter up to 11-level shows its effectiveness. The influence of dead-time over the algorithm performance is investigated too.

关键词： Inverters Vectors Switches Modulation Equations Mathematical model Switching frequency

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OPEN-END WINDING PERMANENT MAGNET SYNCHRONOUS GENERATOR SYSTEM WITH REDUCED CONTROLLED SWITCH COUNT

OPEN-END WINDING PERMANENT MAGNET SYNCHRONOUS GENERATOR SYST...

引用

Brazilian Power Electronics Conference

作者： Cursino B. Jacobina Nady Rocha Nustenil S. M. L. Marinus Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Electrical Engineering Department (DEE) Federal University of Campina Grande (UFCG) Electrical Engineering Department (DEE) Federal University of Paraiba (UFPB)

ISBN: (纸本)9781479902712

This paper presents an open-end winding permanent magnet synchronous generator system with reduced controlled switch count, which may be applied to Wind Energy Conversion Systems (WECS). The configuration is obtained from the blend of a three-phase controlled rectifier (composed only of controlled switches), a non-controlled rectifier (composed only of diodes) and an open-end winding machine. A detailed model and a PWM control strategy of the systems, including the synchronism technique are presented to ensure the elimination of zero-crossover distortion normally caused by the use of diodes. Simulation and experimental results are also presented.

关键词： Control Power Converter Synchronous Generator

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