EPE Association: EPE 2005 - Topic 18-2

EPE 2005 - Topic 18-2 - DS: Education
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 18: EDUCATION > EPE 2005 - Topic 18-2 - DS: Education

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   A hardware tool for explained power electronics control of induction motors
By TEIXEIRA Henrique; ARAUJO Rui Esteves; BARBOSA Jose; LEITE Vicente [View]
[Download]

Abstract: This paper presents a digital controller suitable for an instructional laboratory in electric drives. A prototype has been designed specifically to meet the requirements of low cost and motivating education tool, and it contains all of the active functions required to implement the open loop control of induction motors. This approach develops the concept of “grey box” module where the details are built for convenience, but not hidden inside as a “black box”. Introductory laboratory experiments are presented to demonstrate how this hardware can be integrated in laboratory classes to present the most important concepts as regards adjustable speed drives.

   A laboratory test bed for PM brushless motor control
By SUDRIA Antoni; GOMIS Oriol; GALCERAN Samuel; MONTESINOS Daniel [View]
[Download]

Abstract: There has been tremendous growth in the use of modern digital signal processors (DSP) in control and other applications in the past few years. While courses offered in the electrical and computer engineering disciplines cover such topics as mobile and digital communications, image and sound encoding and decoding, few courses focus on the use of DSP in real-time control of electrical machinery. On the other hand, there is a growing need in industry for engineers who can perform control design and system integration for various applications in motor control. This paper describes a laboratory test bed for PM motor control for a new course on Control of Electrical Machinery offered at School of Industrial Engineering of Barcelona ETSEIB, Polytechnic University of Catalonia, Barcelona, Spain.An outline of the course structure, laboratory setup, and the design aspects for implementing modern real-time motor control applications are presented.

   A NEW EDUCATIONAL SET-UP FOR POWER ENGINEERING LABORATORY
By KUZNIETSOV Alexander [View]
[Download]

Abstract: This paper presents a new educational set-up for using in industrial electronics laboratory. The presented system consists of a precision power meter, an autonomous data logging unit as well as application software. It helps students to understand the concepts of electrical appliances, machines and drives by measurement the typical signals with different filtering and synchronisation tools, visualisation of the data as well as an implementation of results in analytical models created with Matlab/Simulink. The education kit can present typical waveforms, phasor diagrams, real, active and reactive power and spectral diagrams, as well as to be used for improved laboratory practice, like investigation of transformers, PWM devices and rotating machines. Additionally there is a possibility to evaluate power quality with statistical and regression analysis.

   AN EXPERIMENTAL AND TRAINING PLATFORM FOR UNINTERRUPTED POWER IN ISOLATED LOCATIONS: WIND TURBINE – ELECTRIC GENERATOR – BATTERY BANK (TP-WT-UPS)
By MARTINEZ Abelardo; GIMENEZ MariA Isabel; GUZMAN ViCtor; FERNANDEZ Herman [View]
[Download]

Abstract: A new modular platform that can be used to combine different energy sources and power electronics conversion blocks in a training environment is presented. The proposed equipment, called Training Platform for Wind Turbine Uninterruptible Power Supply (TP-WT-UPS) models a wind driven uninterruptible power supply feeding a critical load in an isolated location. Two energy sources are emulated (a wind turbine and a combustion engine driven AC generator), the three basic power electronic blocks (DC/DC, DC/AC AC/DC) and control electronics (microprocessor and data gathering subsystems) are provided in a modular architecture that can be modified to suit a particular configuration. Wherever possible, standard off-the-shelf car parts such as alternators and AVR are used. TP-WT-UPS can be used both in the training of engineers, giving them hands-on experience on these topics, and also as a design tool to expedite the development of new projects.

   Calculation and display of influences on field-oriented control of three-phase induction machines with interactive parameter modification by using LabVIEW
By GIEssMANN Andreas; KUss Hans; BRENNER Eberhard [View]
[Download]

Abstract: The use of graphical software tools has a favorable effect on imparting technical facts in fields of education. In order to profit by the visual effect the principle of interactive parameter modification is used in this work. Besides a cyclical program execution the knowledge of the system-describing equations is required. The graphical programming system LabVIEW [1], [2] meets these requirements and it has been used to visualize the field-oriented control principle. This work desribes two software tools, which were developed to improve the understanding of the field-oriented control.These visual tools are particularly focused on students but also on engineers in fields of education including lectures, exercises, practical trainings and through self-tudy, too.

   Comparison of university level study methods and laboratory equipment for teaching of electrical drives
By LAUGIS Juhan; LEHTLA Tonu [View]
[Download]

Abstract: The paper deals with teaching problems on the university level. Integration of different study fields like mechatronics, electrical drives and industry automation is under discussion. The article compares different classical and modern study methods and laboratory equipment: classical lecture and laboratory courses, virtual Internet-based training and virtual laboratories, project-based learning by doing, self-made stands for experiments, standardized teaching laboratory systems, and industrial component-based laboratories.

   DEVELOPMENT OF THE EDUCATIONAL DATABASE ON THREE-PHASE POWER FACTOR CORRECTORS
By ZIMIN A.M.; WEISS Helmut; ZINOVIEV Gennady S.; STRZELECKI Ryszard; ZIMIN N.M. [View]
[Download]

Abstract: Three-phase power factor correctors exist in a wide variety. A large step in improving the education on this important field is accomplished by integrating a detailed cognitive part (all circuit structures, basic properties, operation) and a practical part (mathematical analysis, structural synthesis, design, simulation) into an Microsoft © Access® database environment. The data base exhibits the opportunity to select by query the corresponding topologies and circuits of pre-defined properties, and to have full access to the original publications of all included circuits and the variations and improvements. Selecting the most suitable circuit for a specific demand is supported by integrating standard and advanced power quality factors and numerical parameters on cost and performance. The data base allows a favourable overview on power factor correction circuits during learning and also for developers of industrial circuits.

   ESD laboratory for power electronics students
By SCHUH Stephan; KUEBRICH Daniel; ALBACH Manfred; KUGLER Felix [View]
[Download]

Abstract: Since the usage of microelectronic components and IC’s in electronic systems is growing year by year and reliability is always an issue, the designer has to be aware of possible failures of the components. The ESD (electrostatic discharge) phenomenon arouses more and more interest as these parts are sensitive to short time over voltages. Simulations to predict the effect of ESD in the actual power electronics circuitry are not possible as sufficient models for the components and the complete circuit configuration are not available. Experiments with ESD in conjunction with power electronic devices should make students aware of possible impacts of ESD pulses and methods to protect devices and circuitry. In this paper four experiments together with simple test circuits are presented, which show different aspects of ESD stress like the typical current and voltage wave forms of ESD pulses, system malfunction, pre deterioration and total damage of components.

   MODERN TECHNOLOGIES FOR EXPERIMENTAL EDUCATION IN INDUSTRIAL ELECTRONICS AND ELECTRIC DRIVES
By FARIA Jose; PALMA JoãO; MARGATO Elmano; GAMBOA Paulo; FERREIRA Luisa [View]
[Download]

Abstract: Abstract: This paper describes the methods used by the teaching group of power electronics and electrical drives of Electrical Engineering and Automation Department of Instituto Superior de Engenharia de Lisboa (Portugal) to increase the efectiveness of experimental training in the areas of industrial electronics and electric drives.It is well known that the interest of new students for electrical engineering courses has decreased, all over the world, and some proactive actions have to be done by engineering schools in order to increase their attractiveness.The approaches followed by this teaching group were intended to improve the student enrollment and to develop sustained competences in the electrical engineer profile by a fair balance between didactic tools and industrial equipment. A judicious introduction of industrial material in laboratory work can be both stimulating as well as a valuable link to the real world.The versatility and moderate cost of modern integrated power electronics modules, the capacities of modeling and control dedicated software, modern digital signal processors and also the judicious use of industry grade equipment, opened new challenges in experimental training. This set of equipment allows to build a variety of configurable open systems, with more or less complexity, that can be explored at different levels of power electronics and electrical drives, from the power stage to the control functions, as exemplified in this paper.

   NEW E-LEARNING TOOLS FOR DC-DC CONVERTERS
By NAGY Istvan; OGASAWARA Satoshi; FUNATO Hirohito; HAMAR Janos [View]
[Download]

Abstract: The paper gives an overview of the Yoto project, a novel e-learning initiative to build up an electrical engineering knowledge base. It also presents a new e-module of the project relating to the steady-state operation of dc-dc converters. The multimedia rich module contains numerous interactive tools promoting the high level education in the academy sector and the vocational trainings in the industry. The interactive tools also highly support the circuit design process by enabling fast calculation and access to relevant circuit quantities and waveforms (voltages and currents) in steady-state without long simulations.

   New Facilities for Teaching and Research with Decentralized Electric Drive Systems
By BUECHNER Peter [View]
[Download]

Abstract: University education has to be continuously modernized in using latest research results. On the other hand teaching of increasing numbers of groups of students needs a modularised conception with a step by step increasing level of drive and motion control tasks. These ideas have been realised in the year 1992 with four equal laboratory stands using a two-machine stand with a dc-motor coupled with an ac-asynchronous motor with slip-rings. Both motors were fed by digitally controlled converters. The positive experience of the teaching principle with always the same technique and growing tasks for the students was the reason for a re-design of the laboratory with the state of the art converter technology of the year 2004. The paper describes new facilities designed with the support of industry allowing various investigations of drive components, drive control, communications with field bus systems and the operation of the drives under real industrial network conditions in the sense of a scale model with a rated power of 7.5 kW. The re-design was based on the traditional education in Electrical Power Engineering as well as in the new five years course of Mechatronics at the Dresden University of Technology.

   Power Electronics Laboratory combined with Digital Regulators
By HOFF Erik; FUGLSETH Thomas; UNDELAND Tore; KULKA Arkadiusz [View]
[Download]

Abstract: Power electronics laboratory for 4th year masters students has been combined with digital voltage regulator design. This has been done to let the students get practical experience with the interactions between hardware and software. Relational and instrumental understandings are compared as methods of introducing the lab. A questionnaire surprisingly shows least learning effect for relational understanding, probably because it pulled focus away from inductive teaching which is important for student motivation.

   REMOTE SYSTEM FOR THE STUDY OF DC-DC CONVERTERS
By MARTINE; EGUIZABAL GANDARA Luis; LAGO Alfonso [View]
[Download]

Abstract: The solution that is shown in this paper allows to students of different subject of Power Electronics, the accomplishment of a complete study of DC/DC converters, by means of two different exercises: 1.Design. The students must evaluate the behavior of the power circuit in open loop, chosen between different components for the implement of the studied topology. The software facilities tools for the measure of the main waveforms of the topology, such as: inductor current, control signal to the switch, output voltage…2.Test. After the study of the power circuit, the software allows analyzing response of the power converter in close loop, by means of a set of test: line regulation, load regulation… The developed system is based on a test bench manufactured by Hewlett-Packard. Taking this one as starting point, a software application has been developed using the visual programming language “LabVIEW”. This programming tool combined with CGI (Common Gateway Interface), allows the remotely execution using a web browser, increases the versatility and utility of the system.

   Training Platform for Teaching Power Electronics Using PIC Microcontrollers
By WALTER Julio; FERNANDEZ QUEVEDO Juan; CESAR Orellana; GUZMAN Victor; CEGLIA Gerardo; GIMENEZ Maria [View]
[Download]

Abstract: This paper presents a low cost, high efficiency, power electronics training platform of modular architecture for educational purposes, based on the PIC family of microcontrollers. It can operate both as a stand-alone system or connected to a standard PC. It is design to be programmed with Microchip freeware MPLAB. The platform supports laboratory work in the study of the power stages and the study of power electronics controls in real time. A digital light dimmer is developed as one introductory application for the training platform.

EPE 2005 - Topic 18-2 - DS: Education
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 18: EDUCATION > EPE 2005 - Topic 18-2 - DS: Education
	[return to parent folder]

	A hardware tool for explained power electronics control of induction motors By TEIXEIRA Henrique; ARAUJO Rui Esteves; BARBOSA Jose; LEITE Vicente	[View] [Download]
Abstract: This paper presents a digital controller suitable for an instructional laboratory in electric drives. A prototype has been designed specifically to meet the requirements of low cost and motivating education tool, and it contains all of the active functions required to implement the open loop control of induction motors. This approach develops the concept of “grey box” module where the details are built for convenience, but not hidden inside as a “black box”. Introductory laboratory experiments are presented to demonstrate how this hardware can be integrated in laboratory classes to present the most important concepts as regards adjustable speed drives.

	A laboratory test bed for PM brushless motor control By SUDRIA Antoni; GOMIS Oriol; GALCERAN Samuel; MONTESINOS Daniel	[View] [Download]
Abstract: There has been tremendous growth in the use of modern digital signal processors (DSP) in control and other applications in the past few years. While courses offered in the electrical and computer engineering disciplines cover such topics as mobile and digital communications, image and sound encoding and decoding, few courses focus on the use of DSP in real-time control of electrical machinery. On the other hand, there is a growing need in industry for engineers who can perform control design and system integration for various applications in motor control. This paper describes a laboratory test bed for PM motor control for a new course on Control of Electrical Machinery offered at School of Industrial Engineering of Barcelona ETSEIB, Polytechnic University of Catalonia, Barcelona, Spain.An outline of the course structure, laboratory setup, and the design aspects for implementing modern real-time motor control applications are presented.

	A NEW EDUCATIONAL SET-UP FOR POWER ENGINEERING LABORATORY By KUZNIETSOV Alexander	[View] [Download]
Abstract: This paper presents a new educational set-up for using in industrial electronics laboratory. The presented system consists of a precision power meter, an autonomous data logging unit as well as application software. It helps students to understand the concepts of electrical appliances, machines and drives by measurement the typical signals with different filtering and synchronisation tools, visualisation of the data as well as an implementation of results in analytical models created with Matlab/Simulink. The education kit can present typical waveforms, phasor diagrams, real, active and reactive power and spectral diagrams, as well as to be used for improved laboratory practice, like investigation of transformers, PWM devices and rotating machines. Additionally there is a possibility to evaluate power quality with statistical and regression analysis.

	AN EXPERIMENTAL AND TRAINING PLATFORM FOR UNINTERRUPTED POWER IN ISOLATED LOCATIONS: WIND TURBINE – ELECTRIC GENERATOR – BATTERY BANK (TP-WT-UPS) By MARTINEZ Abelardo; GIMENEZ MariA Isabel; GUZMAN ViCtor; FERNANDEZ Herman	[View] [Download]
Abstract: A new modular platform that can be used to combine different energy sources and power electronics conversion blocks in a training environment is presented. The proposed equipment, called Training Platform for Wind Turbine Uninterruptible Power Supply (TP-WT-UPS) models a wind driven uninterruptible power supply feeding a critical load in an isolated location. Two energy sources are emulated (a wind turbine and a combustion engine driven AC generator), the three basic power electronic blocks (DC/DC, DC/AC AC/DC) and control electronics (microprocessor and data gathering subsystems) are provided in a modular architecture that can be modified to suit a particular configuration. Wherever possible, standard off-the-shelf car parts such as alternators and AVR are used. TP-WT-UPS can be used both in the training of engineers, giving them hands-on experience on these topics, and also as a design tool to expedite the development of new projects.

	Calculation and display of influences on field-oriented control of three-phase induction machines with interactive parameter modification by using LabVIEW By GIEssMANN Andreas; KUss Hans; BRENNER Eberhard	[View] [Download]
Abstract: The use of graphical software tools has a favorable effect on imparting technical facts in fields of education. In order to profit by the visual effect the principle of interactive parameter modification is used in this work. Besides a cyclical program execution the knowledge of the system-describing equations is required. The graphical programming system LabVIEW [1], [2] meets these requirements and it has been used to visualize the field-oriented control principle. This work desribes two software tools, which were developed to improve the understanding of the field-oriented control.These visual tools are particularly focused on students but also on engineers in fields of education including lectures, exercises, practical trainings and through self-tudy, too.

	Comparison of university level study methods and laboratory equipment for teaching of electrical drives By LAUGIS Juhan; LEHTLA Tonu	[View] [Download]
Abstract: The paper deals with teaching problems on the university level. Integration of different study fields like mechatronics, electrical drives and industry automation is under discussion. The article compares different classical and modern study methods and laboratory equipment: classical lecture and laboratory courses, virtual Internet-based training and virtual laboratories, project-based learning by doing, self-made stands for experiments, standardized teaching laboratory systems, and industrial component-based laboratories.

	DEVELOPMENT OF THE EDUCATIONAL DATABASE ON THREE-PHASE POWER FACTOR CORRECTORS By ZIMIN A.M.; WEISS Helmut; ZINOVIEV Gennady S.; STRZELECKI Ryszard; ZIMIN N.M.	[View] [Download]
Abstract: Three-phase power factor correctors exist in a wide variety. A large step in improving the education on this important field is accomplished by integrating a detailed cognitive part (all circuit structures, basic properties, operation) and a practical part (mathematical analysis, structural synthesis, design, simulation) into an Microsoft © Access® database environment. The data base exhibits the opportunity to select by query the corresponding topologies and circuits of pre-defined properties, and to have full access to the original publications of all included circuits and the variations and improvements. Selecting the most suitable circuit for a specific demand is supported by integrating standard and advanced power quality factors and numerical parameters on cost and performance. The data base allows a favourable overview on power factor correction circuits during learning and also for developers of industrial circuits.

	ESD laboratory for power electronics students By SCHUH Stephan; KUEBRICH Daniel; ALBACH Manfred; KUGLER Felix	[View] [Download]
Abstract: Since the usage of microelectronic components and IC’s in electronic systems is growing year by year and reliability is always an issue, the designer has to be aware of possible failures of the components. The ESD (electrostatic discharge) phenomenon arouses more and more interest as these parts are sensitive to short time over voltages. Simulations to predict the effect of ESD in the actual power electronics circuitry are not possible as sufficient models for the components and the complete circuit configuration are not available. Experiments with ESD in conjunction with power electronic devices should make students aware of possible impacts of ESD pulses and methods to protect devices and circuitry. In this paper four experiments together with simple test circuits are presented, which show different aspects of ESD stress like the typical current and voltage wave forms of ESD pulses, system malfunction, pre deterioration and total damage of components.

	MODERN TECHNOLOGIES FOR EXPERIMENTAL EDUCATION IN INDUSTRIAL ELECTRONICS AND ELECTRIC DRIVES By FARIA Jose; PALMA JoãO; MARGATO Elmano; GAMBOA Paulo; FERREIRA Luisa	[View] [Download]
Abstract: Abstract: This paper describes the methods used by the teaching group of power electronics and electrical drives of Electrical Engineering and Automation Department of Instituto Superior de Engenharia de Lisboa (Portugal) to increase the efectiveness of experimental training in the areas of industrial electronics and electric drives.It is well known that the interest of new students for electrical engineering courses has decreased, all over the world, and some proactive actions have to be done by engineering schools in order to increase their attractiveness.The approaches followed by this teaching group were intended to improve the student enrollment and to develop sustained competences in the electrical engineer profile by a fair balance between didactic tools and industrial equipment. A judicious introduction of industrial material in laboratory work can be both stimulating as well as a valuable link to the real world.The versatility and moderate cost of modern integrated power electronics modules, the capacities of modeling and control dedicated software, modern digital signal processors and also the judicious use of industry grade equipment, opened new challenges in experimental training. This set of equipment allows to build a variety of configurable open systems, with more or less complexity, that can be explored at different levels of power electronics and electrical drives, from the power stage to the control functions, as exemplified in this paper.

	NEW E-LEARNING TOOLS FOR DC-DC CONVERTERS By NAGY Istvan; OGASAWARA Satoshi; FUNATO Hirohito; HAMAR Janos	[View] [Download]
Abstract: The paper gives an overview of the Yoto project, a novel e-learning initiative to build up an electrical engineering knowledge base. It also presents a new e-module of the project relating to the steady-state operation of dc-dc converters. The multimedia rich module contains numerous interactive tools promoting the high level education in the academy sector and the vocational trainings in the industry. The interactive tools also highly support the circuit design process by enabling fast calculation and access to relevant circuit quantities and waveforms (voltages and currents) in steady-state without long simulations.

	New Facilities for Teaching and Research with Decentralized Electric Drive Systems By BUECHNER Peter	[View] [Download]
Abstract: University education has to be continuously modernized in using latest research results. On the other hand teaching of increasing numbers of groups of students needs a modularised conception with a step by step increasing level of drive and motion control tasks. These ideas have been realised in the year 1992 with four equal laboratory stands using a two-machine stand with a dc-motor coupled with an ac-asynchronous motor with slip-rings. Both motors were fed by digitally controlled converters. The positive experience of the teaching principle with always the same technique and growing tasks for the students was the reason for a re-design of the laboratory with the state of the art converter technology of the year 2004. The paper describes new facilities designed with the support of industry allowing various investigations of drive components, drive control, communications with field bus systems and the operation of the drives under real industrial network conditions in the sense of a scale model with a rated power of 7.5 kW. The re-design was based on the traditional education in Electrical Power Engineering as well as in the new five years course of Mechatronics at the Dresden University of Technology.

	Power Electronics Laboratory combined with Digital Regulators By HOFF Erik; FUGLSETH Thomas; UNDELAND Tore; KULKA Arkadiusz	[View] [Download]
Abstract: Power electronics laboratory for 4th year masters students has been combined with digital voltage regulator design. This has been done to let the students get practical experience with the interactions between hardware and software. Relational and instrumental understandings are compared as methods of introducing the lab. A questionnaire surprisingly shows least learning effect for relational understanding, probably because it pulled focus away from inductive teaching which is important for student motivation.

	REMOTE SYSTEM FOR THE STUDY OF DC-DC CONVERTERS By MARTINE; EGUIZABAL GANDARA Luis; LAGO Alfonso	[View] [Download]
Abstract: The solution that is shown in this paper allows to students of different subject of Power Electronics, the accomplishment of a complete study of DC/DC converters, by means of two different exercises: 1.Design. The students must evaluate the behavior of the power circuit in open loop, chosen between different components for the implement of the studied topology. The software facilities tools for the measure of the main waveforms of the topology, such as: inductor current, control signal to the switch, output voltage…2.Test. After the study of the power circuit, the software allows analyzing response of the power converter in close loop, by means of a set of test: line regulation, load regulation… The developed system is based on a test bench manufactured by Hewlett-Packard. Taking this one as starting point, a software application has been developed using the visual programming language “LabVIEW”. This programming tool combined with CGI (Common Gateway Interface), allows the remotely execution using a web browser, increases the versatility and utility of the system.

	Training Platform for Teaching Power Electronics Using PIC Microcontrollers By WALTER Julio; FERNANDEZ QUEVEDO Juan; CESAR Orellana; GUZMAN Victor; CEGLIA Gerardo; GIMENEZ Maria	[View] [Download]
Abstract: This paper presents a low cost, high efficiency, power electronics training platform of modular architecture for educational purposes, based on the PIC family of microcontrollers. It can operate both as a stand-alone system or connected to a standard PC. It is design to be programmed with Microchip freeware MPLAB. The platform supports laboratory work in the study of the power stages and the study of power electronics controls in real time. A digital light dimmer is developed as one introductory application for the training platform.