Assessment of a Universal Reconfiguration-less Control Approach in Open-Phase Fault Operation for Multiphase Drives

Multiphase drives have been important in particular industry applications where reliability is a desired goal. The main reason for this is their inherent fault tolerance. Di erent nonlinear controllers that do not include modulation stages, like direct torque control (DTC) or model-based predictive control (MPC), have been used in recent times to govern these complex systems, including mandatory control reconfiguration to guarantee the fault tolerance characteristic. A new reconfiguration-less approach based on virtual voltage vectors (VVs) was recently proposed for MPC, providing a natural healthy and faulty closed-loop regulation of a particular asymmetrical six-phase drive. This work validates the interest in the reconfiguration-less approach for direct controllers and multiphase drives

Acercamiento a una metodología científica en cursos de energía eólica para ingenieros electrónicos

La docencia y la investigación son actividades que se realizan de manera simultánea en la práctica universitaria, pero cuya conexión suele ser débil. Mientras que el método científico se basa en etapas bien conocidas, ésta metodología y el know-how asociado raramente se integran en cursos a nivel de grado. Este trabajo describe la integración de teoría, simulación, experimentación a escala de laboratorio y desarrollos industriales dentro de cursos de energía eólica para ingenieros eléctricos. La metodología propuesta reutiliza el conocimiento adquirido en la faceta investigadora y acerca al estudiante a los últimos desarrollos industriales y tendencias científicas usando una metodología científica en cursos de multidisciplinares de energía eólic

A PBL Experience in an Electronic Engineering Introductory Course

The adaptation of the traditional Engineering degrees to the European Higher Education Area creates many challenges in the implementation of recent educational paradigms. This is the case of the Engineering Degree in Industrial Technologies at the University of Seville, Spain, which has been teaching since 1964, and has been adapted to be started in the 2010/2011 academic year. This new degree includes a second year one-semester introductory course in electronic engineering, which has been taught for the first time in the 2011/2012 academic year with 400 enrolled students. Most of these students will not continue studying electronic technology, and an important effort has been done to improve the student’s progress, attitude and perception of the course. This paper presents the new course teaching approach, where an up-bottom methodology has been designed and a PBL teaching/learning experience has been included. The obtained results and students’ feedback are also detailed

Impact of post-fault flux adaptation on six-phase induction motor drives with parallel converters

The redundancy of multiphase drives provides an inherent fault-tolerant capability that is appreciated in applications with a complicated corrective maintenance or safety-critical requirements. Fault restrictions however force the system to be reconfigured to operate in a smooth and efficient manner. Previous works have been focused on the optimization of current waveforms to generate an undisturbed operation but still maintaining the pre-fault rated flux settings. This work shows that efficient controllers can improve the post-fault performance in six-phase induction machines supplied by parallel- connected converters if offline optimization is used to obtain a variable reference flux. Theoretical and experimental results confirm that the proposed flux adaptation method provides higher torque/power capability, lower degree of imbalance in the current sharing between windings and efficiency improvementMinisterio de Ciencia e Innovación ENE2014-52536-C2-1-R DPI2013- 44278-RJunta de Andalucía P11-TEP-755

Aplicación de tecnologías multimedia para el aprendizaje asíncrono de instrumentación electrónica

El Congreso TAEE'06, organizado por la Universidad Politécnica de Madrid,tuvo lugar entre el 12 de julio y el 15 de julio de 2006El avance de las TIC y el empleo de herramientas hipermedia para el aprendizaje asíncrono adquieren un nuevo significado dentro del nuevo marco del Espacio de Europeo de Educación Superior. Éste introduce un cambio en el paradigma organizativo y educativo de la universidad con la incorporación de la nueva filosofía de crédito europeo. Este hecho nos motiva a crear un bloque de herramientas educativas que se adapten a la nueva filosofía y, entre ellas, una herramienta multimedia para aprendizaje asíncrono de instrumentación electrónic

Sistema de gestión de conocimiento basado en Moodle como herramienta de apoyo a la docencia de una asignatura práctica

El Congreso TAEE'06, organizado por la Universidad Politécnica de Madrid,tuvo lugar entre el 12 de julio y el 15 de julio de 2006El nuevo contexto social, político y educativo en el que nos vemos inmersos hoy día está mayormente impulsado por las TIC, imperando la necesidad de innovación en los modelos que tradicionalmente conocemos, especialmente en el contexto universitario. El nuevo Espacio Europeo de Educación Superior no es una excepción, y nuestra adaptación pasa por la creación de herramientas como la que aquí presentamos, un entorno Web de gestión de conocimiento empleado en la enseñanza práctica de un laboratorio de instrumentación electrónica.Ministerio de Educación y Ciencia (TSI2005-24 068-E)

A simple braking method for six-phase induction motor drives with unidirectional power flow in the base-speed region

Induction motor drives supplied from diode front-end rectifiers are commonly used in industrial applications due to their low cost and reliability. However, the two-quadrant operation of such a topology makes the regenerative braking impossible. Braking resistors can be used to dissipate the braking power and provide enhanced braking capability, but additional hardware is then necessary. Alternatively, the braking power can be dissipated within the inverter/motor by control software reconfiguration. In this scenario, the additional degrees of freedom of multiphase drives can be used to increase the system losses without disturbing the flux and torque production. Experimental results confirm the possibility to enhance the braking capability of six-phase drives with only few changes in the control scheme

Application of DSP in Power Conversion Systems — A Practical Approach for Multiphase Drives

Digital Signal Processing is not a recent research field, but has become a powerful technology to solve engineering problems in the last few decades due to the introduction by Texas Instruments in 1982 of the Digital Signal Processor. Fast digital signal processors have quickly become a cornerstone of high-performance electrical drives, where power electronic conversion systems have heavy online computation burdens and must be controlled using complex control algorithms. In this sense, multiphase drives represent a particularly interesting case of study, where the computational cost highly increases with each extra phase. This technology has been recognized in recent times as an attractive electrical drive due to its usefulness in traction, more-electric aircraft applications and wind power generation systems. However, the complexity of the required control algorithms and signal processing techniques notably increases in relation with conventional three-phase drives. This chapter makes a revision of the necessities of a high-performance multiphase drive from the digital signal processing perspective. One of the most powerful Texas Instruments’ digital signal processor (TMS320F28335) is used, and specific control algorithms, electronic circuits and acquisition processing methods are designed, implemented and analyzed to show its interest in the development of a high-performance multiphase drive

An open-phase fault detection method for six-phase induction motor drives

Malaga (Spain), 4th to 6th April, 2017 Comunicaciones del Congreso Publicadas en: Renewable Energy and Power Quality Journal (RE&PQJ) ISSN 2172 038X, No.15 April 2017Induction machines (IM) with multiple sets of three-phase windings are a real alternative in safety- critical applications due to their inherent redundancy and extra number of freedom degrees. These properties can be used to devel op a fault-tolerant system without extra hardware. The fault detection is mandatory in the creation of a fault tolerant system. Since, the fault localization allows to adapt the control scheme of this anomalous mode of operation. Nowadays, open-phase faults (OPFs) and six-phase IMs are hot topics in the literature of fault-tolerant drives. Thus, this paper presents an open-phase fault detection method for a six-phase IM drive . The detection method is based o n the vector space decomposition (VSD), taking the components of the secondary orthogonal subspace to localize the open-phase fault. The goodness of the proposed method is validated with simulation resultsMinisterio de Ciencia e Innovacion ENE2014-52536-C2–1-

Multiphase Current Imbalance Localization Method Applied to Natural Fault- Tolerant Strategies

Multiphase machines are interesting options for high-reliability applications due to their inherent fault tolerance against open-circuit faults (OCFs). Moreover, if the regulation of the x-y currents is realized in open-loop mode using virtual voltage vectors (VVs), the mandatory post-fault control reconfiguration is avoided. The new reconfiguration-less approach was recently defined as a natural/passive fault-tolerant strategy, offering good prospects for industry applications. This work extends the idea to the fault detection (FD) procedure and suggests new settings for the current imbalance localization (CIL) method. The proposal is based on the vector space decomposition (VSD) approach that allows the joint detection of OCFs and stator resistances dissymmetry (RDs). Experimental results in a five-phase induction motor (IM) drive using VVs confirm the viability of the technique