Articles
<![CDATA[Direct Torque Control Strategy of PMSM Employing Ultra Sparse Matrix Converter ]]>
<![CDATA[Muldi Yuhendri]]>;
<![CDATA[Ahyanuardi Ahyanuardi]]>;
<![CDATA[Aswardi Aswardi]]>
<![CDATA[ International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 9, No 1: March 2018 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijpeds.v9.i1.pp64-72
<![CDATA[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.]]>
<![CDATA[Maximum Output Power Tracking of Wind Turbine Using Intelligent Control ]]>
<![CDATA[Muldi Yuhendri]]>;
<![CDATA[Mochamad Ashari]]>;
<![CDATA[Mauridhi Hery Purnomo]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 2: August 2011 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v9i2.690
<![CDATA[ The Output power of wind turbine is determined by wind speed. The Output power can be adjusted by controlling the generator speed and pitch angle of wind turbine. When the wind speed below the wind turbine rated, the output power of generator can be maximized by controlling the generator speed at point of maximum power coefficient. When the wind speed above the wind turbine rated, output power of wind turbine will exceed the power generators rated. In this condition, the output power of wind turbine needs to be regulated to conform to the generator power rate. Output power of wind turbine can be regulated by adjusting the pitch angle of wind turbine. In this paper is developed the control strategies based intelligent control for controlling the generator speed and pitch angle of wind turbine, so the maximum output power tracking (MOPT) of wind turbine can be obtained at any wind speed variations. 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. ]]>
<![CDATA[A novel optimum tip speed ratio control of low speed wind turbine generator based on type-2 fuzzy system ]]>
<![CDATA[Muldi Yuhendri]]>;
<![CDATA[Mukhlidi Muskhir]]>;
<![CDATA[Taali Taali]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 4: December 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i4.1450
<![CDATA[Variable speed control of wind turbine generator systems have been developed to get maximum output power at every wind speed variation, also called Maximum Power Points Tracking (MPPT). Generally, MPPT control system consists of MPPT algorithm to track the controller reference and generator speed controller. In this paper, MPPT control system is proposed for low speed wind turbine generator systems (WTGs) with MPPT algorithms based on optimum tip speed ratio (TSR) and generator speed controller based on field oriented control using type-2 fuzzy system (T2FS). The WTGs are designed using horizontal axis wind turbines to drive permanent magnet synchronous generators (PMSG). The simulation show that the MPPT system based optimum TSR has been able to control the generator output power around the maximum point at all wind speeds.]]>
<![CDATA[Pengembangan Jobsheet Trainer Motor Listrik di Sekolah Menengah Kejuruan ]]>
<![CDATA[Romi Fadli]]>;
<![CDATA[Muldi Yuhendri]]>
<![CDATA[ Jurnal Pendidikan Teknik Elektro Vol 1 No 1 (2020): Jurnal Pendidikan Teknik Elektro ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang ]]>
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<![CDATA[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.]]>
<![CDATA[Pengembangan Modul Kerja Bengkel dan Gambar Teknik untuk Sekolah Menengah Kejuruan ]]>
<![CDATA[Shandy Oktafianto Pratama]]>;
<![CDATA[Muldi Yuhendri]]>
<![CDATA[ Jurnal Pendidikan Teknik Elektro Vol 1 No 1 (2020): Jurnal Pendidikan Teknik Elektro ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang ]]>
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<![CDATA[Distance learning carried out during the COVID 19 pandemic requires learning materials that students can use independently. One of the learning sources that can be used independently is the learning module. This study proposes the development of a workshop work subject module and technical drawings for class X Audio Video Engineering students at the State Vocational High School (SMKN) 1 Koto XI Tarusan. Module development is carried out using the 4D method (define, design, develop, and disseminate). Using the 4D development method can make students better understand and know how to use workshop work learning modules and technical drawings. To see the feasibility of the module, a validity test was carried out by an expert and a practicality test by the user. The test results gave the validity value carried out by the validator of 0.89 in the valid category, while the practicality test carried out by the teacher of workshop work subjects and technical drawings gave a value of 87.14% with the practical category. The results of this study indicate that the learning modules made for workshop work subjects and technical drawings are suitable for use as learning resources.]]>
<![CDATA[Media Pembelajaran dengan Powerpoint Sebagai Instrumen Pembelajaran untuk Sekolah Menengah Kejuruan ]]>
<![CDATA[Muldi Yuhendri]]>;
<![CDATA[Simon Padri P]]>
<![CDATA[ Jurnal Pendidikan Teknik Elektro Vol 1 No 1 (2020): Jurnal Pendidikan Teknik Elektro ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang ]]>
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<![CDATA[This study aims to produce valid and practical Powerpoint media in basic electricity and electronics subjects in class X (SMKN) 5 Padang. To achieve this goal, the authors develop the media using research and development methods with the following steps : (1) analyzing the need to determine the problem, (2) determining KD in determining material needs, (3) defining concepts, (4) analyzing students which is an analysis of student characteristics, (5) sketching, (6) collecting media objects, (7) making media designs, (8) expert validation stage, (9) revision based on expert validation, (10) trial phase. The development results show that Powerpoint media is proven to be very valid. The test results gave the validity value carried out by the validator of 0.91 from the expected score to be in the valid category, while the practicality test carried out by the subject teacher gave a value of 94.2% of the score which was expected to fall into the very practical category. The results of this study indicate that learning media with Powerpoints made for basic electricity and electronics subjects are suitable for use as learning resources.]]>
<![CDATA[Pengembangan E-Modul Mata Pelajaran Instalasi Penerangan Listrik untuk Pembelajaran Daring ]]>
<![CDATA[Luthfil Hirzan]]>;
<![CDATA[Muldi Yuhendri]]>
<![CDATA[ Jurnal Pendidikan Teknik Elektro Vol 1 No 1 (2020): Jurnal Pendidikan Teknik Elektro ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang ]]>
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<![CDATA[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.]]>
<![CDATA[Pengembangan Lembar Kerja Peserta Didik Berbasis Masalah pada Pembelajaran Pemograman Mikroprosesor dan Mikrokontroler ]]>
<![CDATA[Selfi Harowanti]]>;
<![CDATA[Muldi Yuhendri]]>
<![CDATA[ Jurnal Pendidikan Teknik Elektro Vol 2 No 1 (2021): Jurnal Pendidikan Teknik Elektro ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang ]]>
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<![CDATA[This research is motivated by several things, namely the limitations of supporting books for student books, students still have difficulty mastering the learning material well. This study aims to develop a valid and practical student worksheet for Microprocessor and Microcontroller Programming in SMKN 1 Koto XI Tarusan. The research method uses the type of research R & D (Research & Development) with the 4D development model (Define, Design, Develop and Disseminate). Data were collected using the LKPD validation and practicality instrument sheet, the LKPD validity questionnaire and the LKPD practicality questionnaire. The subjects of this study were problem-based microcontroller and microprocessor programming LKPD, with research respondents as class XI TAV 2 students and PMM subject teachers at SMKN 1 Koto XI Tarusan. The questionnaire used in the study was in the form of a Likert scale with a score of 1 to 5. The results of the research on the development of problem-based Student Worksheets on the distribution of the mediation validation questionnaire obtained the average percentage results on valid criteria, the material validation questionnaire distribution obtained the average percentage result On the valid criteria, the teacher practicality questionnaire got the average percentage result on the very practical criteria and the students' practicality questionnaire got the average percentage results on the practical criteria. The results of this study indicate that the development of problem-based Student Worksheets made for Microprocessor and Microcontroller Programming subjects has been criticized as valid and practical.]]>
<![CDATA[Analisis Kelengkapan Peralatan Praktek Dasar Listrik Elektronika di SMK ]]>
<![CDATA[Agung Satria]]>;
<![CDATA[Muldi Yuhendri]]>
<![CDATA[ Jurnal Pendidikan Teknik Elektro Vol 2 No 1 (2021): Jurnal Pendidikan Teknik Elektro ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang ]]>
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<![CDATA[Education is a systematic process to increase the dignity of human development in a holistic manner, which enables the full potential of individuals so that the aspirations of developing Indonesian people as a whole can be achieved. Completeness of equipment or facilities is the level of achievement in the form of the number of facilities that are directly used for practical learning by Electrical Installation and Power Engineering students with the standard number that should be owned by the school or department. This research is a descriptive study which aims to analyze the completeness of workshop practice equipment using quantitative descriptive method. The research was conducted with data starting from several methods (observation, portfolio, questionnaire, and documentation) which were then adjusted to the research instruments that had been prepared. The results of the research conducted show that the completeness of practical equipment at Muhammadiyah 1 Padang Vocational School with student learning outcomes in Basic Electrical and Electronics subjects is proven by 25 students categorized as complete, and proposing 10 approximate aspects, then the appropriate answer is found, the number of students who complete more number of students who did not complete.]]>
<![CDATA[Pengembangan E-Modul Dasar Listrik dan Elektronika di Sekolah Menengah Kejuruan ]]>
<![CDATA[Reni Putri Mayenti]]>;
<![CDATA[Muldi Yuhendri]]>
<![CDATA[ Jurnal Pendidikan Teknik Elektro Vol 2 No 1 (2021): Jurnal Pendidikan Teknik Elektro ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang ]]>
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<![CDATA[Basic Electrical and Electronics Subjects are basic subjects that must be studied by students. In the implementation of learning, there is a lack of handle modules for students, so that students' learning motivation is low which has an impact on learning outcomes. The availability of adequate teaching materials will certainly increase learning motivation and make it easier for students to understand lessons. Therefore, it is necessary to have teaching materials that support the learning process in utilizing technology, one of which is by using e-modules. This research aims to produce a valid and practical e-module in the subject of basic electricity and electronics for class X TITL at SMKN 1 West Sumatra. This study uses a 4-D development model, with four stages, namely Define, Design, Develop and Disseminate. The subjects of this research trial were students of class X TITL at SMKN 1 West Sumatra. The data were collected using a validity and practicality questionnaire in the form of a Likert scale that was validated by an instrument expert lecturer. The results of the e-module development research on the distribution of the e-module validity questionnaire obtained the average percentage results on the valid criteria. In distributing the e-module practicality questionnaire, teacher respondents got the average percentage result on the practical criteria and the e-module practicality questionnaire, the students' respondents got the average percentage results on the practical criteria. The results of this study indicate that the development of e-modules made for Basic Electrical and Electronics subjects has been criticized as valid and practical.]]>
