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  • Reduction of Output Common Mode Voltage Using a Novel SVM Implementation in Matrix Converters for Improved Motor Lifetime

     Espina, Jordi; Ortega, Carlos; De Lilo, Liliana; Empringham, Lee; Balcells Sendra, Josep; Arias Pujol, Antoni
    IEEE transactions on industrial electronics
    Date of publication: 2014-11-01
    Journal article

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    This paper presents the study of an alternative space vector modulation (SVM) implementation for matrix converters (MCs), which reduces the output common mode (CM) voltage. The strategy is based on replacing the MC zero vectors with rotating ones. In doing this, the CM voltage (CMV) can be reduced, which, in turn, reduces the CM leakage current. By reducing the CM current, which flows inside the motor through the bearings and windings, the induction motor (IM) deterioration can be slowed down. This paper describes the SVM pattern and analyzes the CMV and the leakage current paths. Simulation and experimental results based on an MC-IM drive are provided to corroborate the presented approach.

    This paper presents the study of an alternative Space Vector Modulation (SVM) implementation for Matrix Converters (MC) which reduces the output Common Mode (CM) voltage. The strategy is based on replacing the MC zero vectors by the rotating ones. In doing this, the CM voltage can be reduced which in-turn reduces the CM leakage current. By reducing the CM current, which flows inside the motor through the bearings and windings, the Induction Motor (IM) deterioration can be slowed down. The paper describes the SVM pattern and analyses the CM voltage and the leakage current paths. Simulation and experimental results based on a MC-IM drive are provided to corroborate the presented approach.

  • Hybrid sensorless permanent magnet synchronous machine four quadrant drive based on direct matrix converter

     Arias Pujol, Antoni; Ortega, Carlos; Zaragoza Bertomeu, Jordi; Espina, Jordi; Pou Felix, Josep
    International journal of electrical power and energy systems
    Date of publication: 2013-02
    Journal article

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    Permanent Magnet Synchronous Machines (PMSMs) have several advantages, such as high ef¿ciency and low volume and weight, which make them attractive for aerospace applications and high performance servo drives. Matrix Converters (MCs) are an all-silicon alternative, with no bulky reactive elements, to the standard voltage source inverter. The most common control technique for such PMSM MC-fed drives is the so-called Field-Oriented Control (FOC), which requires the permanent magnet ¿ux position to achieve high dynamic performance. Encoders or resolvers are the most common sensing devices used for such a purpose, which not only increases the total cost of the PMSM drive but also adds extra electronics and cabling that may cause failures. This paper investigates and proposes an all range (from zero to full) speed hybrid sensorless FOC. The novelty of this paper relies on the use of a hybrid sensorless four quadrant FOC that averages the needed angle estimation from a model based angle estimator and a voltage pulse test injection angle estimator when feeding the PMSM with an MC instead of a standard voltage source inverter. Speed reversal and load impact simulation results are included, fully supporting the claims made in this paper

  • Estrategias de control de generadores offshore y convertidores multinivel conectados a la red eléctrica en sistemas de transmisión de HVDC

     Pou Felix, Josep; Zaragoza Bertomeu, Jordi; Jaen Fernandez, Carlos; Arias Pujol, Antoni; Hervada Sala, Carme; Jarauta Bragulat, Eusebio; Buenestado Caballero, Pablo; Capella Frau, Gabriel Jose
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    Self-video recording for the integration and assessment of generic competencies  Open access

     Masip Alvarez, Albert; Hervada Sala, Carme; Pamies Gomez, Teresa; Arias Pujol, Antoni; Jaen Fernandez, Carlos; Rodriguez Sorigue, Maria Cristina; Romero Duran, David; Nejjari Akhi-elarab, Fatiha; Alvarez Del Castillo, M. Dolores; Roca Lefler, Marta; Hernández Farràs, Jorge; Montferrer Liñan, Raul
    IEEE Global Engineering Education Conference
    Presentation of work at congresses

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    This document presents the use of a self-video-recording service for the integration and assessment of certain generic competences (oral and written communication, teamwork and third (English) language) in all degree programs related to the Industrial area at the Terrassa School of Engineering (EET). The resulting service allows to carry out the assessment through active and collaborative learning methodologies using ICT as a support, becoming an educational resource where students are encouraged to evaluate their own activity, individually and in groups (co-evaluation), and with which the faculty can enhance certain sections of the syllabus while also evaluating generic competences. This paper outlines the rationale and design of the system based on self-recording-video that assists work on some generic competences. A preliminary experience has taken place and it has been carried out by volunteer students and some professors from the promoting team. It consisted of following all steps to obtain the video-recording as a result and fulfil the further assessment. Preparing the defence of the final project career, explaining the way a problem is faced are examples of use of the service endowed to assist the assessment of some generic competences. A good number of students and professors have participated in this preliminary experiment carried out on some subjects and in which oral effective communication will be assessed. A specific rubric for the assessment of generic competences has been used both for students and faculty. There is a summary of qualitative feedback from both students and instructors, and where several issues related to improving the self-assessment and self-video-recording system, are discussed. Finally, a survey is proposed, whose results will be helpful for its improvement.

    This document presents the use of a self-video-recording service for the integration and assessment of certain generic competences (oral and written communication, teamwork and third (English) language) in all degree programs related to the Industrial area at the Terrassa School of Engineering (EET). The resulting service allows to carry out the assessment through active and collaborative learning methodologies using ICT as a support, becoming an educational resource where students are encouraged to evaluate their own activity, individually and in groups (co-evaluation), and with which the faculty can enhance certain sections of the syllabus while also evaluating generic competences. This paper outlines the rationale and design of the system based on self-recording-video that assists work on some generic competences. A preliminary experience has taken place and it has been carried out by volunteer students and some professors from the promoting team. It consisted of following all steps to obtain the video-recording as a result and fulfil the further assessment. Preparing the defence of the final project career, explaining the way a problem is faced are examples of use of the service endowed to assist the assessment of some generic competences. A good number of students and professors have participated in this preliminary experiment carried out on some subjects and in which oral effective communication will be assessed. A specific rubric for the assessment of generic competences has been used both for students and faculty. There is a summary of qualitative feedback from both students and instructors, and where several issues related to improving the self-assessment and self-video-recording system, are discussed. Finally, a survey is proposed, whose results will be helpful for its improvement.

  • Estudio e implementación de nuevas técnicas de modulación para la reducción de perturbaciones EMI en convertidores matriciales  Open access

     Espina Masramon, Jorge
    Defense's date: 2012-11-07
    Department of Electronic Engineering, Universitat Politècnica de Catalunya
    Theses

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    El procesamiento de la energía mediante convertidores electrónicos conmutados ha tomado una relevancia notable durante la última década, y presumiblemente será uno de los campos de la ingeniería con mayor proyección industrial en el futuro. La evolución continua en el campo de la electrónica de potencia ha hecho posible la fabricación de convertidores conmutados cada vez más compactos, capaces de manejar valores de tensión y corriente mayores, conmutando a frecuencias más elevadas. Estas mejoras provocan, a su vez, la generación de perturbaciones electromagnéticas (EMI) fuera del rango permitido por la legislación vigente. Por otro lado, el diseño convertidores con nuevas topologías y una legislación cada vez más restrictiva en cuanto a emisiones EMI se refiere, hace imprescindible la elaboración de nuevas herramientas capaces de analizar los efectos que de las EMI generadas se puedan derivar. Uno de los convertidores de potencia emergentes y que actualmente está adquiriendo especial relevancia es el Convertidor Matricial (MC). El auge del interés por esta topología durante los últimos años ha sido motivado gracias a prestaciones como la conversión directa AC/AC, su gran densidad de potencia y la ausencia de grandes componentes reactivos para el almacenaje de energía. El trabajo que se presenta en este documento trata de dar cobertura al estudio y la reducción de las EMI generadas por los MC. Esta tesis doctoral se ha dividido en dos líneas de investigación: Estudio de las perturbaciones EMI producidas por los MC y prevención de efectos adversos producidos por dichas EMI. La primera línea de investigación ha tenido como objetivo principal el estudio de las EMIs generadas por los MC de topología directa. En dicho estudio se ha desarrollado un modelo EMI para poder predecir las perturbaciones conducidas generadas por dichos convertidores. Uno de los objetivos principales de dicho modelo es proporcionar aproximaciones suficientemente válidas en un tiempo reducido. La estrategia utilizada ha sido el cálculo de las perturbaciones conducidas clasificando estas en modo común (CM) y modo diferencial (DM). El método utilizado se basa en la extracción de circuitos de impedancias equivalentes que proporcionen una representación fidedigna de la generación y propagación de las perturbaciones sin necesidad de complejos sistemas de cálculo. La segunda línea de investigación ha tenido como objetivo reducir el número de descargas eléctricas que se producen en los cojinetes del motor, las cuales son una de las causas principales de la reducción de su vida útil. Estas descargas son debidas a los niveles de la tensión en modo común (CMV) y sus rápidas variaciones en el tiempo (dv/dt). Para reducir los niveles de la CMV se ha desarrollado una modulación basada en la tradicional Space Vector Modulation (SVM) donde se remplazan los vectores cero, utilizados convencionalmente, por vectores rotativos. Este intercambio de vectores ha demostrado que permite reducir de manera significativa la amplitud del CMV y con ello reducir la probabilidad en la aparición de descargas eléctricas en los cojinetes. Además, en el estudio se analiza la utilización de vectores activos de diferentes amplitudes con el objetivo de mejorar la modulación presentada cuando se utilizan índices de modulación pequeños.

    The energy processing using power converters has taken a remarkable importance in the last decade, and in the future it might become one of the engineering fields with greater projection. The continuous evolution in the field of power electronics has made possible to manufacture more compact switched converters, capable of managing higher voltage and currents levels switching at higher frequency. These improvements, however, lead to the generation of electromagnetic perturbations (EMI) which fail the electromagnetic regulations. On the other hand, the converter design using new layout topologies and a regulation law that is becoming more restrictive about EMI emissions makes essential to develop new tools capable to analyze the effects of the EMI generated. One of the emerging power converters which is currently acquiring special relevance is the matrix converter (MC). The rise of interest on this topology in recent years has been determined by different aspects, such as direct AC/AC conversion, its high power density and the absence of large reactive components for energy storage. The work presented in this document tries to cover the study and the reduction of EMI generated by the MC. This Phd thesis has divided in two research lines: The study of the EMI produced by MC and the prevention of the adverse effects produced by EMI. The first research line has mainly focused on the study of EMI generated by MC of direct topology. In this study, a model to predict the conducted EMI has been developed. One of the main objectives of this model is to deliver good approximation results in short time. The strategy used has been the conducted perturbation calculation using the classification of the EMI as common mode (CM) and differential mode (DM). The method used is based on extraction of the equivalent impedance circuit. This equivalent circuit provides a true representation of the generation and propagation of EMI without the need of complex mathematical methods. The second research line has mainly focused on the reduction of electric discharges which is produced inside of the motor bearings, which are the main cause of motor life time reduction. These electrical discharges are produced by the common mode voltage (CMV) levels and its fast time transitions (dv/dt). In order to reduce those levels, a new modulation based on the traditional Space Vector modulation (SVM) has been developed replacing the zero vectors, normally used, for the rotating ones. This vector exchange has shown a significant reduction of the CMV amplitude, and therefore the probability of electrical discharge appearing inside the motor drops considerably. Furthermore, the study analyzes the use of the active vectors with smaller amplitude to improve the modulation when small modulation index is used.

  • Predictive direct torque control of matrix converter fed permanent magnet synchronous machines

     Ortega García, Carlos; Arias Pujol, Antoni; Espina, Jordi
    Asian journal of control
    Date of publication: 2012-10
    Journal article

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    This work presents a predictive direct torque control method for matrix converters fed permanent magnet synchronous machine drives.A new look-up table for direct torque control using matrix converters has been developed. The new look-up table delivers a set of three different vectors, every sample period, that fulfil the torque and flux demands. Based on a predictive algorithm, the voltage vector from the matrix converter ensuring the minimum torque ripple is selected. The system predicts the torque error for each of the three voltage vectors and selects the one that contributes with the minimum error. Simulation and experimental results, which confirm the good performance of the proposed predictive direct torque control using matrix converters are shown.

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    Sensorless sliding mode control of PMSM drives using a high frequency injection algorithm  Open access

     Repecho Del Corral, Victor; Biel Sole, Domingo; Arias Pujol, Antoni
    Przeglad elektrotechniczny
    Date of publication: 2012
    Journal article

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    A high frequency injection (HF) technique for rotor position estimation using Sliding Mode Control (SMC) in Permanent Magnet Synchronous Machines (PMSMs) is presented. Since SMC is used, instead of the Field Oriented Control (FOC), the injected HF test signals for tracking the machine's saliency are naturally eliminated. Such angle information suppression is tackled using"the equivalent control" principle. Simulation results confirm not only the proper angle estimation but also the sensorless control at low speed reversal and load impact at zero speed.

  • Estudi de viabilitat d'implentació d'energies renovables a través de microxarxes en els pobles del Pirineu (RURALGRID)

     Hervada Sala, Carme; Arias Pujol, Antoni; Jaen Fernandez, Carlos; Capella Frau, Gabriel Jose; Zaragoza Bertomeu, Jordi; Pou Felix, Josep
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    Reducing the sampling frequency for the control of the switched reluctance machine  Open access

     Rain, Xavier; Hilairet, Mickael; Arias Pujol, Antoni
    Annual Conference of the IEEE Industrial Electronics Society
    Presentation's date: 2012-10-26
    Presentation of work at congresses

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    This paper presents two solutions for dramatically reduce the sampling frequency and therefore the CPU demand while keeping the same performance in terms of torque ripple and efficiency on a SRM. The problem of a low sampling frequency with a regular control is first highlighted. Then, two different solutions are proposed for the self switching's function. Such solutions tries to magnetize the stator phase at an accurate instant in order to reduce the inherent torque ripple. Simulations results on a 8/6 SRM corroborate the validity of the proposed solutions and show the improvements of its performance.

    Postprint (author’s final draft)

  • Validation of EMI model for matrix converters

     Espina Masramon, Jorge; Balcells Sendra, Josep; Arias Pujol, Antoni; Ortega García, Carlos; Gonzalez Diez, David; Gago Barrio, Javier
    International Symposium on Electromagnetic Compatibility
    Presentation's date: 2012-09-18
    Presentation of work at congresses

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    This paper is focused on the validation of a previously presented method to obtain conducted EMI in direct matrix converters (MC). Such model is based on a frequency domain equivalent circuit, which is applied to two different prototypes of MC in order to validate such method. This paper starts with a review of the EMI method and follows obtaining the equivalent circuit. The experimental part consists of a comparison between EMI simulation results and measured EMI in two different MC. Finally, the paper includes a discussion on the method generalisation.

  • Study and experimental verification of control tuning strategies in a variable speed wind energy conversion system

     Zaragoza Bertomeu, Jordi; Pou Felix, Josep; Arias Pujol, Antoni; Spiteri, Cyril; Robles Sestafe, Eider; Ceballos Recio, Salvador
    Renewable energy
    Date of publication: 2011-05
    Journal article

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    This paper analyzes and compares different control tuning strategies for a variable speed wind energy conversion system (WECS) based on a permanent-magnet synchronous generator (PMSG). The aerodynamics of the wind turbine (WT) and a PMSG have been modeled. The control strategy used in this research is composed of three regulators, which may be based on either linear or nonlinear controllers. In this analysis, proportional-integral (PI) linear controllers have been used. Two different tuning strategies are analyzed and compared. The main goal is to enhance the overall performance by achieving a low sensitivity to disturbances and minimal overshoot under variable operating conditions. Finally, the results have been verified by an experimental WECS laboratory prototype

  • EMI modeling method of AC-AC power converters

     Espina Masramon, Jorge; Balcells Sendra, Josep; Arias Pujol, Antoni; Ortega, Carlos
    IEICE electronics express
    Date of publication: 2011-01-10
    Journal article

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  • Common mode EMI model for a direct matrix converter

     Espina Masramon, Jorge; Balcells Sendra, Josep; Arias Pujol, Antoni; Ortega, Carlos
    IEEE transactions on industrial electronics
    Date of publication: 2011-11
    Journal article

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    This paper presents an electromagnetic interference (EMI) model to evaluate the conducted common mode (CM) disturbances produced by matrix converters (MCs). The model is based on obtaining a high frequency (HF) equivalent circuit with HF sources representing the switching devices. The circuit resolution in the frequency domain allows the calculation of any EMI parameter with very low computational burden and avoids convergence problems, which are common in time domain methods. The original contribution lies in the source model implementation and placement. The simulation and experimental results for CM leakage currents validate the EMI model.

  • Common mode model of matrix converter

     Espina Masramon, Jorge; Balcells Sendra, Josep; Ortega Garcia, Carlos; Arias Pujol, Antoni; de Lillo, Liliana; Empringham, Lee
    Compatibilty and Power Electronics
    Presentation's date: 2011-06-01
    Presentation of work at congresses

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    This paper deals with the validation of an EMI model to predict electromagnetic interferences (EMI) produced by direct AC/AC matrix converters (MC). The method is based on obtaining a high frequency equivalent circuit, using a combined time and frequency domain approach based on: “EMI source identification→ propagation path impedance→ derived disturbance”. The advantages of the proposed procedure are the computational time reduction and the lack of convergence problems, which may arise when using pure time domain procedures. The paper is focused on the prediction of common mode (CM) EMI of a matrix converter. The simulation results of this case will permit the calculation of currents which leak through the ground connections.

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    Estimación de posición en un motor síncrono de imanes permanentes mediante técnicas de inyección de alta frecuencia con control deslizante  Open access

     Repecho Del Corral, Victor; Arias Pujol, Antoni; Biel Sole, Domingo; Guinjoan Gispert, Francisco
    Seminario Anual de Automática, Electrónica Industrial e Instrumentación
    Presentation's date: 2011-07-06
    Presentation of work at congresses

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    En el presente documento, se muestra el estudio para la estimación de la posición del rotor de un Motor de Imanes Permanentes (PMSM), mediante inyección de señal de alta frecuencia (HF) bajo un control en modo deslizante (SMC). Las técnicas de inyección de alta frecuencia han sido utilizadas con éxito en sistemas de control de campo orientado (FOC), pero no dan buenos resultados en controles no lineales como el control directo de torque (DTC), por su mayor ancho de banda. Estas técnicas se basan en la medición indirecta de las inductancias de estátor, las cuales dependen del valor de la posición de rotor. En el presente estudio se muestra una técnica que permite utilizar técnicas de inyección bajo un control en modo deslizamiento. Para concluir se muestran simulaciones del sistema con los algoritmos de estimación propuestos, confirmando la utilidad del sistema propuesto.

  • Angle estimation using high frequency injection for sliding mode controlled permanent magnet synchronous machines drives

     Repecho Del Corral, Victor; Biel Sole, Domingo; Arias Pujol, Antoni; Guinjoan Gispert, Francisco
    International Conference-Workshop on Compatibility and Power Electronics
    Presentation's date: 2011-06-01
    Presentation of work at congresses

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    In this paper, high frequency injection (HF) technique for rotor position estimation using Sliding Mode Control (SMC) in Permanent Magnet Synchronous Machines (PMSMs) is presented. The novelty of this paper is the fact that the SMC is used instead of the conventional Field Oriented Control (FOC) and therefore the injected HF test signals for tracking the machine’ saliency (difference between Ld and Lq) is naturally eliminated by the SMC. Such suppression is tackled when using the SMC and the position signals are calculated to properly estimate the permanent magnet (PM) position. Finally, some simulation results are presented, confirming the proper angle estimation at low speed reversal and load impact at zero speed.

  • Reduction of the common mode voltage of a matrix converter fed direct torque control

     Ortega, Carlos; Arias Pujol, Antoni; Caruana, Cedric; Apap, Maurice
    IEICE electronics express
    Date of publication: 2010-07-25
    Journal article

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  • Space Vector Modulation strategy to reduce the Common Mode perturbations in Matrix Converters

     Espina Masramon, Jorge; Ortega Garcia, Carlos; Arias Pujol, Antoni; Balcells Sendra, Josep
    IEICE electronics express
    Date of publication: 2010-02-25
    Journal article

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  • Improved Waveform Quality in the Direct Torque Control of Matrix-Converter-Fed PMSM Drives

     Ortega, Carlos; Arias Pujol, Antoni; Caruana, Cedric; Balcells Sendra, Josep; Asher, Greg J.
    IEEE transactions on industrial electronics
    Date of publication: 2010-06
    Journal article

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  • Review of anti-windup strategies for PI speed controllers in field oriented control of permanent magnet synchronous machines

     Espina Masramon, Jorge; Arias Pujol, Antoni; Balcells Sendra, Josep; Ortega García, Carlos
    Przeglad elektrotechniczny
    Date of publication: 2010-10
    Journal article

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    The work presented in this paper addresses the unwanted windup phenomenon reviewing and comparing different PI anti-windup strategies employed in speed control of electric drives. The tuning process of PI controllers is usually carried out considering the system as linear and therefore disregarding its physical limits such as maximum current and voltage. To safeguard the system’s integrity, the PI output is normally limited eventually causing the windup phenomenon characterized by long periods of overshoots which may even result in instability. Firstly, this paper models and tunes the current and speed PI controllers with the root locus method for Field Oriented Control of a Permanent Magnet Synchronous Machines. Secondly, it is shown the mentioned unwanted Windup phenomenon in the speed loop. Finally, the Anti-Windup strategies are simulated and their behavior are compared when driving a Permanent Magnet Synchronous Machine with Field Oriented Control. Finally, some experimental results obtained from a PMSM Matrix Converter-fed set up have been carried out. These results corroborate the mathematical study and simulations presented all over this paper.

  • Consecuencias de la integración de turbinas eólicas en la red de distribución y de transporte eléctricos

     Jaen Fernandez, Carlos; Arias Pujol, Antoni; Zaragoza Bertomeu, Jordi; Hervada Sala, Carme; Gonzalez Diez, David; Capella Frau, Gabriel Jose; Pou Felix, Josep
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  • Modeling conducted EMI of matrix converters

     Espina Masramon, Jorge; Balcells Sendra, Josep; Arias Pujol, Antoni; Berbel Artal, Nestor; Ortega Garcia, Carlos
    European Symposium on Electromagnetic Compatibility
    Presentation's date: 2010-09-13
    Presentation of work at congresses

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  • Reducción y adaptación del cuestionario SEEQ para conocer la opinión del alumnado sobre la docencia que recibe

     Corbalán Fuertes, Montserrat; Aldabas Rubira, Emiliano; Arias Pujol, Antoni; Plaza García, Inmaculada; Garrido Picazo, Piedad; Arcega Solsona, Francisco Javier
    Congrés Internacional de Docència Universitària i Innovació
    Presentation's date: 2010-06-30
    Presentation of work at congresses

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    EMI model of an AC/AC power converter  Open access

     Espina Masramon, Jorge; Balcells Sendra, Josep; Arias Pujol, Antoni; Ortega, Carlos; Berbel Artal, Nestor
    IEEE Vehicle Power and Propulsion Conference
    Presentation's date: 2010
    Presentation of work at congresses

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    This paper deals with the validation of an EMI model to predict electromagnetic interferences (EMI) produced by power converters. A direct AC to AC matrix converter (MC) has been selected as experimental setup for the paper, but the modeling method can be applied to other converter topologies. The method is based on obtaining a high frequency equivalent circuit, using a combined time and frequency domain approach based on: “EMI source identification→ propagation path impedance→ derived disturbance”. The advantages of the proposed procedure are the computational time reduction and the lack of convergence problems, which may arise when using pure time domain procedures. The paper is focused on the prediction of common mode (CM) EMI of a matrix converter. The simulation results of this case will permit the calculation of currents which leak through the ground connections. Two different EMI sources are compared: one based on PWM waveforms obtained from MATLAB® model and a second one where these data are obtained experimentally from a MC prototype. This procedure allows the comparison of EMI spectra when using simulated waveforms or real source waveforms.

  • Auto-aprendizaje de sistemas de generacion eólica. Plataforma de simulación modular basada en el entorno Matlab-Simulink

     Pou Felix, Josep; Zaragoza Bertomeu, Jordi; Arias Pujol, Antoni; Robles Sestafe, Eider; Ceballos Recio, Salvador; Ibáñez, P.; Jaen Fernandez, Carlos; Corbalán Fuertes, Montserrat; Pindado Rico, Rafael
    Eolus
    Date of publication: 2009-07-01
    Journal article

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  • PSE-370000-2009-23 (AVANZA)

     Zaragoza Bertomeu, Jordi; Arias Pujol, Antoni; Pou Felix, Josep
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  • PSE-370000-2009-22 (AVANZA)

     Arias Pujol, Antoni; Zaragoza Bertomeu, Jordi; Jaen Fernandez, Carlos; Pou Felix, Josep
    Participation in a competitive project

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    Speed anti-windup PI strategies review for field oriented control of permanent magnet synchronous machines servo drives with matrix converters  Open access

     Espina Masramon, Jorge; Arias Pujol, Antoni; Balcells Sendra, Josep; Ortega García, Carlos; Galceran Arellano, Samuel
    European Conference on Power Electronics and Applications
    Presentation's date: 2009
    Presentation of work at congresses

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    When facing real systems PI tuning, the plant is modeled disregarding its physical limitations. Consequently, the PI output may increase indefinitely its value; phenomenon called Windup. This paper presents a review and a comparison between different Anti-Windup PI strategies used in speed motion and position control for Matrix Converter PMSM servo drives.

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    Common mode output waveform reduction for matrix converter drives  Open access

     Espina Masramon, Jorge; Arias Pujol, Antoni; Balcells Sendra, Josep; Ortega García, Carlos
    IEEE International Conference on Industrial Electronics
    Presentation's date: 2009-11
    Presentation of work at congresses

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    This paper presents an alternative Space Vector Modulation (SVM) implemented in Matrix Converters (MC) which improves and reduces the Common Mode (CM) voltage and current output waveforms. The strategy is based on replacing the MC zero vectors for the rotating ones, which reduces the CM voltage derivative and therefore the leakage CM current. By reducing this CM current, which might flow inside the motor through the bearings and windings, the Permanent Magnet Synchronous Machine (PMSM) deterioration might be slowed down. The paper describes the novel SVM pattern and analyses the CM voltage and its leakage current. Simulation results based on PMSM drive are provided to corroborate the whole idea.

  • On the use of sun trackers to improve maximum power point tracking controllers applied to photovoltaic systems

     Jaen Fernandez, Carlos; Pou Felix, Josep; Capella Frau, Gabriel Jose; Arias Pujol, Antoni; Lamich Arocas, Manuel
    Compatibilty and Power Electronics
    Presentation's date: 2009-05
    Presentation of work at congresses

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  • Predictive vector selector for direct torque control of matrix converter fed induction motors

     Ortega García, Carlos; Arias Pujol, Antoni; Espina Masramon, Jorge
    IEEE International Conference on Industrial Electronics
    Presentation's date: 2009-11
    Presentation of work at congresses

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  • Access to the full text
    Speed anti-windup PI strategies review field oriented control of permanent magnet synchronous machines  Open access

     Espina Masramon, Jorge; Arias Pujol, Antoni; Balcells Sendra, Josep; Ortega García, Carlos
    International Conference-Workshop on Compatibility and Power Electronics
    Presentation's date: 2009-05
    Presentation of work at congresses

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    The work presented in this paper addresses the unwanted windup phenomenon reviewing and comparing different PI anti-windup strategies employed in speed control of electric drives. The tuning process of PI controllers is usually carried out considering the system as linear and therefore disregarding its physical limits such as maximum current and voltage. To safeguard the system’s integrity, the PI output is normally limited eventually causing the windup phenomenon characterized by long periods of overshoots which may even result in instability. Firstly, this paper models and tunes the current and speed PI controllers with the root locus method for Field Oriented Control of a Permanent Magnet Synchronous Machines. Secondly, it is shown the mentioned unwanted Windup phenomenon in the speed loop. Finally, the Anti-Windup strategies are simulated and their behavior are compared when driving a Permanent Magnet Synchronous Machine with Field Oriented Control. Finally, some experimental results obtained from a PMSM Matrix Converter-fed set up have been carried out. These results corroborate the mathematical study and simulations presented all over this paper.

  • Direct Torque Control of Permanent Magnet Synchronous Machines using Matrix Converters  Open access

     Ortega Garcia, Carlos
    Defense's date: 2008-10-23
    Department of Electronic Engineering, Universitat Politècnica de Catalunya
    Theses

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    La demanda d’aplicacions industrials avançades, fa que el control de màquines elèctriques de corrent altern (AC) sigui una disciplina contínuament creixent per satisfer l’alt nivell d’exigència. Tradicionalment, la màquina d’inducció (IM) ha estat la més utilitzada en aplicacions industrials de velocitat variable, incloent-ne bombes i ventiladors, màquines tèxtils i de paper, vehicles elèctrics, generació eòlica, etc. A més dels requeriments funcionals, l’estalvi energètic és, actualment, un aspecte a tenir en compte en aplicacions de velocitat variable. Una alternativa molt atractiva a la IM és la màquina síncrona d’imants permanents (PMSM). Entre d’altres avantatges, aquest tipus de màquines ofereixen una eficiència més elevada, alta densitat de potència i una resposta dinàmica molt ràpida. La demanda industrial de PMSM es situa en el rang de petita potència, encara que el interès en aquest tipus de màquines està creixent, en particular fins al rang dels 100 kW. Històricament, les màquines utilitzades en aplicacions de velocitat variable han estat alimentades per inversors de potència. En els últims anys, el convertidor matricial ha esdevingut un clar competidor del inversor convencional. Un convertidor matricial és un circuit de topologia avançada capaç de convertir directament AC en AC generant una tensió de càrrega amb amplitud i freqüència variable, amb flux de potència bidireccional, formes d’ona sinusoïdal tant a l’entrada com a la sortida i operant amb factor de potència unitari a l’entrada. A més, degut a que requereix no elements inductius ni capacitius per emmagatzemar energia, el disseny del convertidor matricial és molt compacte. Existeixen molts tipus de control per màquines de AC, essent els basats en control vectorial els més adequats per aplicacions de d’alt rendiment. Entre d’altres, el control de camp orientat i el control directe de parell son els més utilitzats. Tot i essent una de les tècniques emergents en aplicacions industrials, el control directe de parell té implícites una sèrie de limitacions que, encara avui, s’estan investigant. El treball presentat en aquesta tesi, s’endinsa en la investigació del control directe de parell per PMSM alimentats amb convertidors matricials. Aquest, treball considera el reemplaçament del inversor convencional per un convertidor matricial, explotant les característiques d’aquest per tal de reduir el arrissat del parell i del flux en la PMSM, inherent al control directe de parell. Durant el transcurs d’aquest treball s’ha desenvolupat un nou control directe de parell utilitzant vectors curts i llargs del convertidor matricial. Els efectes indesitjats de la tensió en mode comú, relacionada amb la utilització de convertidors de potència, és altre dels aspectes que s’aborden en aquest treball. Un algoritme molt simple que redueix la tensió en mode comú ocasionat pel control directe de parell amb convertidors matricials ha estat desenvolupat i investigat en aquesta tesi. La principal limitació de les tècniques “sensorless” basades en models o observadors és que fallen a baixes velocitats. La necessitat d’operar a baixa velocitat o velocitat zero, ha desencadenat la investigació d’altres tècniques on s’exploren les asimetries de la màquina a partir de la injecció d’un senyal d’alta freqüència per obtenir-ne la posició del rotor. Durant aquesta tesi s’ha desenvolupat un nou algoritme de injecció d’un vector rotatori en el pla  quan s’utilitza el control directe de parell.

    The control of AC machine drives is a continuously advancing subject satisfying increasing high performance applications demands. Induction Motor (IM) drives with cage-type machines has been the workhorses of industrial variable speed drives applications, including pumps and fans, paper and textile mills, electric vehicles, locomotive propulsion, wind generation systems, etc. In addition to performance requirements, energy saving aspects of variable speed drives is gaining attention nowadays. Permanent Magnet Synchronous Machines (PMSM) are becoming a very attractive alternative to IM. Among other advantages, these type of machines offer higher efficiency, high power density and very fast dynamic performance. PMSM, in particular in the low power range, are already widely used in industry and recently, the interest in their application is growing, particularly up to 100 kW. Variable speed drives fed by voltage source inverters has been traditionally employed in industrial applications. In the past few years, matrix converters have emerged to become a close competitor to the conventional inverter. A matrix converter is an advanced circuit topology capable of converting AC-AC, providing generation of load voltage with arbitrary amplitude and frequency, bi-directional power flow, sinusoidal input/output waveforms, and operation under unity input power factor. Furthermore, since no inductive or capacitive elements are required, MC allows a very compact design. There are several methods to control AC machines, vector control methods being the most suitable for high performance demands. Among others, field oriented control and direct torque control are the most widely used. Although being one of the emerging control techniques for industrial applications, the direct torque control has some inherent drawbacks that are still being investigated by researchers. The work reported in this thesis is devoted to the investigation of direct torque control of PMSM drives fed by matrix converters. This work considers the replacement of the conventional voltage source inverter by a matrix converter. The features of matrix converters are exploited to reduce the inherent electromagnetic torque and stator flux ripples arising from the direct torque control driving a PMSM. A new direct torque control using small and large voltage vectors of matrix converters has been developed during the course of this work. The undesirable effects of the common mode voltage related with the utilization of the conventional voltage source inverter, like electromagnetic interferences and the machine early failures, are other issues with which this work is also concerned. A very simple algorithm to reduce the common mode voltage in direct torque control drives using matrix converters is developed and investigated in this work. The main limitation of all sensorless vector control schemes, based on the conventional fundamental frequency models or observers, is that they fail at very low speeds. The desirability to operate continuously at low or zero speed has led to another sensorless approaches where the saliency of the machine is tracked through some form of signal injection to obtain flux or position information. A new algorithm to inject a rotating vector in the a-b frame when employing a direct torque control has been developed in this thesis.

  • Improving Direct Torque Control of Induction Motors by means of Multilevel Inveters.

     DEL TORO GARCIA, XAVIER
    Defense's date: 2008-01-23
    University of Galmorgan. Regne Unit
    Theses

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  • Direct torque control of induction motors utilizing three-level voltage source inverters

     Toro, Del X; Arias Pujol, Antoni; Jayne, M G; Witting, P A
    IEEE transactions on industrial electronics
    Date of publication: 2008-02
    Journal article

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  • Model, design, analysis and state-of-the-art control from the blowing wind to the sinusoidal voltages and currents

     Jarauta Bragulat, Eusebio; Pou Felix, Josep; Pindado Rico, Rafael; Jaen Fernandez, Carlos; Arias Pujol, Antoni; Zaragoza Bertomeu, Jordi; Hervada Sala, Carme; Buenestado Caballero, Pablo; Ortega, C
    Date of publication: 2008-09
    Book chapter

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  • Angle estimation for Sensorless Field Oriented Control with Matrix Converters and Surface Mount Permanent Magnet Synchronous Machines

     Arias Pujol, Antoni; Ortega, C; Pou Felix, Josep; Gonzalez Diez, David; Balcells Sendra, Josep
    39th IEEE Power Electronics Specialists Conference. PESC 2008
    Presentation of work at congresses

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  • Plataforma de simulación modular de auto-aprendizaje de sistemas de generación eólica

     Pou Felix, Josep; Zaragoza Bertomeu, Jordi; Arias Pujol, Antoni; Robles Sestafe, Eider; Ceballos Recio, Salvador; Ibañez, Pedro; Jaen Fernandez, Carlos; Corbalán Fuertes, Montserrat; Pindado Rico, Rafael
    Congreso de Tecnologías Aplicadas a la Enseñanza de la Electrónica
    Presentation's date: 2008-07-04
    Presentation of work at congresses

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  • Reducing the Common Mode Voltage in a DTC-PMSM drive using Matrix Converters

     Ortega Garcia, Carlos; Arias Pujol, Antoni; Cedric, C; Apap, M
    14th International Symposium on Industrial Electronics
    Presentation of work at congresses

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  • Un nuevo enfoque para introducir los códigos de Hamming en la ingeniería electrónica

     Aldabas Rubira, Emiliano; Corbalán Fuertes, Montserrat; Arias Pujol, Antoni; Plaza García, Inmaculada; Medrano Pizarro, Carlos; Arcega Solsona, Francisco Javier
    Congreso de Tecnologías Aplicadas a la Enseñanza de la Electrónica
    Presentation's date: 2008-07-03
    Presentation of work at congresses

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    En el presente trabajo se presenta una introducción al algoritmo publicado por el profesor Richard Wesley Hamming en 1950 para detectar y corregir un bit erróneo dentro de una palabra binaria de datos. En primer lugar se definen los conceptos previos necesarios para comprender el alcance del problema, a continuación se describe paso a paso la forma en que trabajan los ya denominados códigos de Hamming. Para finalizar se comentan unos ejemplos prácticos y se propone un circuito de Hamming (11,7) desarrollado en GNU Octave.

  • THE 15th IEEE INTERNATIONAL CONFERENCE ON ELECTRONICS, CIRCUITS AND SYSTEMS

     Arias Pujol, Antoni; Aldabas Rubira, Emiliano; Ortega, C
    IEEE International Conference on Electronics, Circuits and Systems
    Presentation of work at congresses

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  • Amplitude Control of the Neutral-Point Voltage Oscillations in the Three-Level Converter

     Zaragoza Bertomeu, Jordi; Pou Felix, Josep; Arias Pujol, Antoni; Ceballos Recio, Salvador; Robles Sestafe, Eider; Ibañez, P; Gabiola Antxustegi, Igor
    39th IEEE Power Electronics Specialists Conference. PESC 2008
    Presentation of work at congresses

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  • Model, design, analysis and state-of-the-art ontrol from the blowing wind to the sinusoidal voltages and currents

     Pou Felix, Josep; Pindado Rico, Rafael; Jaen Fernandez, Carlos; Arias Pujol, Antoni; Zaragoza Bertomeu, Jordi; Hervada Sala, Carme; Buenestado Caballero, Pablo; Ortega, C; Jarauta Bragulat, Eusebio
    10TH WORLD RENEWABLE ENERGY CONGRESS
    Presentation of work at congresses

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  • Del reto al proyecto una nueva experiencia docente en el marco del Espacio Europeo de Educacion Superior

     Jaen Fernandez, Carlos; Hervada Sala, Carme; Lamich Arocas, Manuel; Corbalán Fuertes, Montserrat; Pou Felix, Josep; Arias Pujol, Antoni
    Congreso de Tecnologías Aplicadas a la Enseñanza de la Electrónica
    Presentation's date: 2008-07-02
    Presentation of work at congresses

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  • Del reto al proyecto: una nueva experiencia docente en el marco del Espacio Europeo de Educación Superior

     Jaen Fernandez, Carlos; Hervada Sala, Carme; Lamich Arocas, Manuel; Corbalán Fuertes, Montserrat; Joseph, Pou; Arias Pujol, Antoni
    Congreso de Tecnologías Aplicadas a la Enseñanza de la Electrónica
    Presentation's date: 2008-07-02
    Presentation of work at congresses

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  • Sensorless field orinted control with matrix converters and surface mount permanent magnent synchronous machines

     Arias Pujol, Antoni; Pou Felix, Josep; Zaragoza Bertomeu, Jordi; Balcells Sendra, Josep; Ortega, C
    IEEE International Conference on Electronics, Circuits and Systems
    Presentation of work at congresses

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  • Common mode voltage in dtc drives using matrix converters

     Ortega, C; Arias Pujol, Antoni; Caruana, C; Apap, M
    IEEE International Conference on Electronics, Circuits and Systems
    Presentation of work at congresses

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  • Permanent Magnet Synchronous Motor Sensorless Control using pulse test shorter voltages Matrix Converters vectors

     Arias Pujol, Antoni; Aldabas Rubira, Emiliano; Ortega Garcia, Carlos; Zaragoza Bertomeu, Jordi; Pou Felix, Josep; Jaen Fernandez, Carlos
    14th International Symposium on Industrial Electronics
    Presentation of work at congresses

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  • Permanent-magnet wind turbines control tuning and torque estimation improvements

     Robles Sestafe, Eider; Ceballos Recio, Salvador; Pou Felix, Josep; Arias Pujol, Antoni; Martin, J L; Ibañez, P
    IEEE International Conference on Electronics, Circuits and Systems
    Presentation of work at congresses

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  • Tracking method for the hybrid modulation to minimize neutral-point voltage oscillations in three-level converter

     Zaragoza Bertomeu, Jordi; Pou Felix, Josep; Ceballos Recio, Salvador; Arias Pujol, Antoni; Ibañez, Pedro
    IEEE International Conference on Electronics, Circuits and Systems
    Presentation of work at congresses

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