Matrix converter is a good choice for Permanent Magnet Synchronous Motor (PMSM) drives, because it has high power density and does not require dc-link energy storage. the disadvantages of conventional matrix converter is using 18 active switches, so it becomes expensive and the modulation method becomes more complicated than back to back converter. To minimize this problem, this paper proposes variable speed drive of PMSM using Ultra Sparse Matrix Converter (USMC) based on Direct Torque Control (DTC) methods. This converter uses only 9 active switches, making it cheaper than conventional matrix converter. DTC is designed based on Space Vector Modulation (SVM) to reduce torque and flux ripples due to the hysteresis control in conventional DTC. The simulation results show that DTC based SVM using USMC effectively controls the rotor speed with low torque and flux ripples.
Electrical Lighting Installation is a training course that is studied by class XI students in the Electrical Power Installation Engineering skill competency of SMK. In the learning process students find it difficult to learn the material provided by the teacher. In connection with the current situation, namely the Corona or Covid-19 Pandemic. The government makes social distancing policies. To that end, several schools stopped the face-to-face learning process. As a substitute for students having to take part in distance learning or online, it is important to have online or distance learning media that students use independently and maintain their enthusiasm for learning. This study aims to produce a product in the form of an e-module using the Sigil software in a valid and practical IPL training course. The research subjects were IPL E-Module class XI TITL in SMK. The research method used is Research and Development with reference to the Borg and Gall model. Based on the research results, the validity of the e-module of the Electrical Lighting Installation from three validators consisting of 1 media expert lecturer, 1 material expert and 1 IPL training subject teacher obtained an average achievement level of 93% with the very valid category. Practicality Test with respondents consisting of two IPL training subject teachers obtained an average achievement level of 90% with the category very practical. From the research data described, it can be concluded that the e-module learning in the IPL training course is valid and practical.
Abstrak Kecepatan generator dikendalikan dengan PI-fuzzy logic controller (PI-FLC) berbasis direct field oriented control (DFOC). Sudut pitch turbin dikendalikan dengan recurrent Elman neural network (RENN). Hasil simulasi dengan simulink Matlab menunjukkan bahwa aplikasi kedua pengendali ini sukses meregulasi daya output ketika kecepatan angin di atas rating turbin dan daya output generator dapat maksimum ketika kecepatan angin di bawah rating turbin. Kata kunci: MOPT, turbin angin, PI-FLC, RENN, DFOC Abstract Generator speed is controlled using PI Fuzzy Logic Controller (PI-FLC) based Direct Field Oriented Control (DFOC). Pitch angle of wind turbine is controlled using Elman Recurrent Neural Network (RENN).The simulation results with Matlab Simulink shows that the both controller was successfully regulates the output power when the wind speed above the wind turbine rated and the output power can be maximum when the wind speed below the wind turbine rated.
One of the practical subjects in the Electrical Power Installation Engineering department of SMK Negeri 2 Sawahlunto is the installation of an electric motor. One of the factors that support the smooth implementation of the practicum is the availability of a jobsheet as a guide in practice. In this study, a jobsheet was developed to obtain a valid and practical jobsheet in the subject of Electrical Motor Installation. Jobsheet development is carried out based on the 4D development research method, which includes defining, designing, developing and disseminating stages. The validity of the jobsheets is evaluated through media and material experts, while the practicality of the jobsheets is evaluated through users. The validity and practicality of the jobsheets were tested using a questionnaire. The results showed that the jobsheets developed for electrical motor installation subjects were feasible to use. This can be seen from the results of practicality tests and validity tests that have been carried out. The results of the validity test of the three validators obtained an average score of 90% in the valid category, while the results of the Practicality test from the teacher obtained a score of 84% in the very practical category, and the practicality test of students obtained an average score of 86% with a very practical category.
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