Java applets para um software educacional distribuído em eletrônica de potência

This paper presents a comparison analysis between two engineering software platforms, Matlab/Simulink & PSIM, which are used as major educational tools in the teaching of power electronics and electrical drive courses, in additional to conducted research in these fields. The comparison analysis is based on studying the design simplicity of the module, time consumed in building of the module, accuracy, functionality, simulation time, and the acceptability of obtained results. Various power electronic simulation circuits are illustrated and the results are processed and displayed. The simulation results states that Matlab/Simulink is a suitable platform for control and regulation of the simulation processes, in additional to its dominant role in conducting research tasks. Conversely, PSIM is dedicated to power electronic circuits and machine simulation tasks with fast and robust algorithms and suitable for educational purposes. It is recommended that both packages be used in teaching power electronics courses.

The present teaching content of the power electronics course is insufficient to cover the power electronics technology used in building electrical engineering. This paper analyzes the relationship between building electrical engineering and power electronics technology, investigates the main power electronics technology used in building electrical engineering, introduces the teaching content of current power electronics course, analyzes the insufficiency of current teaching content related to the practice of electrical engineering, and proposes the principles and directions for the reformation and innovation of the teaching content of the course of power electronics for the major of building electricity and intelligence.

The power electronics course is a rather challenging subject for instructors and undergraduate students pursuing Bachelor’s Degree in Electrical Engineering. To enhance teaching effectiveness and motivate self-learning capabilities of the students, this paper presents a pedagogical approach for mathematical modeling and simulation of switching mode DC-DC converters. The Buck and Boost converters are analyzed as benchmark systems to study the power converter modeling methodologies. And a comparative analysis using digital simulation from Matlab/Simulink and ATP/EMTP is presented. A summary of student survey is also presented, which shows a high level of satisfaction. The presented pedagogical approach would be useful for classroom teaching for the power electronics course and similar engineering courses. DOI: http://dx.doi.org/10.11591/telkomnika.v10i6.1361 Full Text: PDF

We have developed power electronics course in electrical engineering class for university students in teacher training faculty who have not background of physics and advanced mathematics at high school. The purpose of this course is to let students understand that power electronics is one of vital and realistic solutions for environmental and energy problem. An educational induction heating machine has been designed and developed for the class. Features of the inverter for this machine are simple circuit configuration with self-oscillation using magnetic saturable core, soft-switching scheme, and safety at classroom. Finally, this course was evaluated by questionnaires and interview.

Laboratory exercises to accompany an undergraduate power electronics course are discussed. Topics include inductors, periodic steady state, drive circuits, PWM control, average switch models, and startup. These laboratories present an evolutionary sequence of increasingly difficult, design-oriented power electronics laboratories.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Simulation based approach to teach the Power Electronic course is proposed in this paper. The simulation tool is oriented towards Electrical and Electronics Engineering (EEE) students at the undergraduate level, enrolled in courses such as Power Electronics, Power Semiconductor drives or the like. The proposed teaching methodology is demonstrated by simulation example of a realistic converter system. The paper discusses the MATLAB/SIMULINK tool and the implementation of simulation for enhancing student learning ability of complex power electronic systems.

While the past decade has seen a widespread adoption of power electronics curriculum at various university electrical engineering programs, authentic laboratory experiences for students remains to be a challenge for inclusion in the programs. This paper discusses a modular power electronics learning platform called PEGO. PEGO consists of self-contained two terminal modular building blocks for power converters which may be cascaded stage by stage to achieve an overall functional objective. The system has been developed to complement a lecture based design oriented theory course in power electronics. The theory course and the laboratory platform are designed to lead to a system level project experience for the students. A primitive UPS system consisting of a battery charger, high frequency isolated dc-dc converter and a low frequency pulse width modulated inverter is illustrated as a candidate project experience. A detailed description of the system along with sample results from the hardware/software exercises are presented in the paper.

In this paper, PSpice is used to deepen the student understanding of power electronics and to serve as a design tool for power converter circuits. A library that includes automated versions of dc/dc converters and rectifiers is built in PSpice using ideal switches. The automated version permits students to design converter circuits that meet a set of design criteria. The performance of various designs are tested by plotting the current and voltage waveforms using the graphics postprocessor Probe. The library was introduced to students in a power electronics course, and they have been asked to augment its contents through mini-design projects. The response was positive, which will encourage the extension of the approach to other subjects.

This paper presents the results and acquired experience from the Project-Oriented Teaching (POT) of the undergraduate students in Power Electronics course at the Faculty of Electrical Engineering and Computer Science in Maribor, based on using a boost converter test-board. In the project task, the students are asked to calculate the main boost converter circuit parameters capacitor C and inductor L; they are additionally required to design the inductor L in order to meet the project goals. The whole project design is based on the ideas from the CDIO (Conceive, Design, Implement, Operate) framework in which the students are encouraged to consider the whole system process to obtain hands-on experience. Finally, students have to design a PI-voltage controller to connect their newly obtained knowledge with their prior knowledge.

In order to keep a periodic maintenance for the laboratories of electrical & electronic engineering and prolong the lifespan of their equipment, these labs must be periodically updated. Nowadays, due to the unstable situation of the country, the cost of the laboratories equipment increases and sometimes spare parts are not available. However, most of these labs are out of date and do not follow the rapid development of the electrical systems. In addition, they contain a lot of non-operational equipment, devices, parts, and measurement units. Therefore, because of these reasons, modeling and simulation tools for electrical systems have emerged to enable users building up, observing, analyzing, modifying and designing various operational systems without the actual need to order components and assembling. This paper presents a simulations packet for educational and training purposes. The simulations package deals with power electronics converters and their applications. This developed tool version is improved for electrical and electronic engineering students at the undergraduate level and is covering the practical part of power electronics courses. The proposed simulations package is based on libraries of Matlab/Simulink software. The methodology is demonstrated by realizing numerous simulation examples of converter circuits.

The paper presents a study for comparing boost converters for single cell Li-ION battery boosting circuit used in power-bank devices. A comparison is made with a synchronous internal switch boost converter against an external switch non-synchronous converter. Efficiency, load-and line-regulation characteristics are presented alongside the operating regimes of both converters. The study can be useful for field applications engineers to determine the choice between an internal switch or external switch topology and synchronous against non-synchronous converter. On the other hand, the research is useful from a methodological point of view in studying the basic circuits of power electronic converters with different applications in power electronics courses, as they aid and support the development of analytical thinking and the accumulation of the students' practical experience during the different courses.

This DVD-ROM contains digital high resolution sidescan-sonar data collected during USGS cruise SEAX 96004 aboard the R/V Seaward Explorer. The coverage lies along New York Bight. This DVD-ROM (Digital Versatile Disc-Read Only Memory) has been produced in accordance with the UDF DVD- ROM Standard and is therefore capable of being read on any computing platform that has appropriate DVD-ROM driver software installed. Access to the data and information contained on this DVD-ROM was developed using the HyperText Markup Language (HTML) utilized by the World Wide Web (WWW) project. Development of the DVD-ROM documentation and user interface in HTML allows a user to access the information by using a variety of WWW information browsers (i.e. NCSA Mosaic, Netscape) to facilitate browsing and locating information and data. To access the information contained on this disc with a WWW client browser, open the file 'index.htm' at the top level directory of this DVD-ROM with your selected browser. The HTML documentation is written utilizing some HTML 4.0 enhancements. The disc should be viewable by all WWW browsers but may not properly format on some older WWW browsers. Also, some links to USGS collaborators are available on this DVD-ROM. These links are only accessible if access to the Internet is available during browsing of the DVD-ROM. Software is available on this DVD-ROM for viewing and processing the individual swaths using computer systems running the UNIX operating system.

최근 들어, WWW(World Wide Web)의 급속한 보급으로 많은 양의 정보가 생성되고 있다. 이로 인하여 웹은 이제 정보 교환의 도구로서 뿐 아니라 정보의 저장소로 인식되게 되었다. 현재 웹상의 많은 문서들은 HTML(Hypertext Markup Language)을 사용하여 제작되었다. HTML은 간단하고 배우기가 쉬운 반면, 데이터에 대한 기술을 명확하게 하지 못하는 단점으로 인해 정보 검색에 있어서 효율성을 제공하지 못한다. 이를 보완하기 위한 방법 중에 하나가 구조적인 언어로 부상하고 있는 XML(eXtensible Markup Language) 문서로 변환하는 것이다. XML은 웹 상에서 데이터 교환을 위해 제안된 표준 메타 언어이다. 효과적인 데이터의 교환을 위해, XML은 DTD(Document Type Definition)를 통하여 문서의 구조를 기술할 수 있고 사용자가 원하는 대로 정의할 수 있다. 이러한 구조적 유동성은 웹에서 운용되는 모든 데이터를 통합, 저장, 처리할 수 있는 기반을 제공한다. 본 논문에서는 특히 유사한 패턴을 갖는 HTML 문서의 구조를 분석하고 그에 관련된 경로 정보를 인식하는 방식을 이용하여 XML 문서로의 변환을 자동적으로 수행할 수 있는 XML 변환기를 구현하였다. Recently, WWW(World Wide Web) has become a source of a large amount of information, and is now recognized not only as an information-sharing tool, but also as an information repository. Currently, the majority of documents on the web were created using HTML(Hypertext Markup Language). Although HTML is simple and easy to learn, its inherent lack of describing document structure makes it difficult to retrieve information effectively. One possible solution would be to convert such HTML documents into XML (extensible Markup Language) documents. This is a standard markup language for exchanging data on the web. It can describe a document structure freely by defining its own DTD (Document Type Definition). This makes it possible to integrate, store, and retrieve data on the web efficiently In this paper, we will propose a converter that automatically converts HTML documents with similar pattern into XML documents by analyzing the document structure and recognizing its path information.

A Novel Approach to HTML Page Creation Using Neural Network

Washington Accord process of accreditation as adopted by National Board of Accreditation (NBA, India) plays a vital role in making policy and for implementation of Outcome Based Education (OBE). Implementation of OBE is based entirely on the evaluation of the students for different graduate attributes. These graduate attributes are nothing but the programme outcomes and its attainment through course outcomes is a major tool used for assessment. While the analysis of the attainment gives a measure of the outcome, the corrective measures taken (after each assessment) shows how the student progresses and improves towards the end of the course. This paper shows that analysis of the Power Electronic course outcomes for assessment of Programme Outcomes as one of the tool. It also shows that improvements, in the assessment of the students who do not meet the pre-defined target, reported after corrective measures taken that reflects in the attainment of course outcomes.