Engineering education can reach the desired level if practical laboratory works are given together with the theory. In electrical engineering education, if foundation costs are considered the electrical machine labs become very important. Due to the increasing number of students accessing the university educational structures, the cost of laboratories for didactical electric machine applications is going to be very high. In this study, virtual laboratory, which is found to have wide application field in recent years, is introduced. For this purpose, a virtual electrical machine lab for electrical engineering lab courses is developed. An example of application was presented for the control of synchronous motor and no-load and blocked rotor test of synchronous generator. Moreover, this study explores the learning effect related to different learning styles of web-based virtual lab that has developed in electric engineering students.
Engineering education requires theoretical backgrounds to be supported by practical experience. Traditional laboratory practices are the supplementary parts of an education program which provide students practical skills and prepare them for professional life. However, since the real experiments are not always possible to carry out due to the limitations in equipments, suitable places, and sometimes limited time, alternative teaching means are needed. In this study, virtual application of asynchronous machine in a constant reference frame is given by a practical and functional interface, which can be a supportive tool for electrical engineering education. Asynchronous motor is generally modeled assuming constant parameters and linear inductance in transient analysis. However, many motors are designed for running in saturation region. In this application, magnetic saturation effect is also considered. All controls and variables of virtual application can be observed and saved in real time. An educational approach is adopted here to develop a virtual lab which can be used as a tool for education and demonstrative purposes. ß
Abstract:In this study, a new approach that is closer to the real turbine without abandoning the advantages of nonlinear modeling simplicity compromising the simplicity of the nonlinear model is proposed. The purpose of the study is to contribute to making theoretical studies of microhydroelectric power plants (MHPPs) more realistic. Studies on their control, especially frequency control, have increased with the expansion of grid-connected power plants. However, some problems have occurred when converting simulation studies of the frequency control to practical studies. The reasons for these problems are that the systems cannot be modeled completely. In this study, first, the nonlinear model equations of a Pelton turbine are primarily constituted. The efficiency curve of the turbine is then obtained experimentally and added to the nonlinear model. The simulation results are compared with the data obtained from the prototype MHPP with a Pelton turbine developed in the laboratory. Finally, it is seen that the proposed method is successful. Thus, with the help of the proposed method, theoretical studies that researchers do can be easily converted into practical applications.
Bu çalışmada, Tek Fazlı Matris Dönüştürücünün (TFMD) frekans değiştirici olarak çalışması incelenmiştir. TFMD'nin devre topolojisi ve çalışması ele alınmış ve frekans değiştirici olarak çalışması için güvenli komutasyon anahtarlama stratejisi verilmiştir. Bu çalışmanın modellenmesi ve simülasyonu MATLAB/Simulink de yapılarak belirtilen çıkış frekansı değerleri için çıkış gerilimi dalga şekilleri elde edilmiştir.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.