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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) TEKNIK Jurnal Teknik Elektro Indonesian Journal of Electrical Engineering and Informatics (IJEEI) PROtek : Jurnal Ilmiah Teknik Elektro Sistemasi: Jurnal Sistem Informasi Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING Praxis : Jurnal Sains, Teknologi, Masyarakat dan Jejaring CYCLOTRON JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) Journal of Robotics and Control (JRC) Indonesian Journal of Electrical Engineering and Computer Science Jurnal Litbang Provinsi Jawa Tengah Jurnal Nasional Teknik Elektro dan Teknologi Informasi Jurnal Rekayasa elektrika Jurnal INFOTEL
Slamet Riyadi
Program Studi Teknik Elektro, Universitas Katolik Soegijapranata
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Public Health Social Sciences

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Controlling the Output Voltage of a Step Up-Down Five-Level Inverter Leonardus Heru Pratomo; Slamet Riyadi; Agengkarunia Cahyadi Wibawa
Jurnal Teknik Elektro Vol 15, No 1 (2023): Jurnal Teknik Elektro
Publisher : Jurusan Teknik Elektro, Fakultas Teknik, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v15i1.43877

Abstract

The increasing demand for electrical energy must be balanced with using renewable energy. However, the use of renewable energy requires a system to maximize the conversion of renewable energy into electrical energy. Various topologies have been studied to achieve maximum energy conversion. Two types of inverters, namely step up-down, have been widely used but have their respective limitations. Step-down inverters can only be used in lower output voltage than input voltage conditions with simple control, while step-up inverters can only operate in higher output voltage than input voltage conditions. This paper aims to combine these two converters to have both step-up-down voltage functions, with the goal of expanding the operating range and maintaining the advantages of each type. Thus, a topology called a step-up-down five-level inverter with a simple voltage-controlled capacitor balancing system is proposed in this paper. Finally, the simulation and laboratory tests were done. This inverter operates in step-up-down voltage, and the voltage in capacitors is always balanced to reach the desired level. The voltage control was done to get the constant voltage event the load was changed.
Design and Implementation of Boost Voltage Doubler for Maximum Power Point Tracker Application Using STM32F1038CT Laras Triefena; Leonardus H. Pratomo; Slamet Riyadi; F. Budi Setiawan
JURNAL INFOTEL Vol 12 No 4 (2020): November 2020
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v12i4.545

Abstract

Photovoltaic is an absolute device in the solar power plant system. A DC-DC converter with a maximum power point tracker (MPPT) algorithm is required to obtain the maximum power of photovoltaic. In general, solar power plant applications used a two-stage converter: the first stage is boosting DC-DC converter, and the second stage is the multilevel Inverter. Boost DC-DC converter is usually implemented singly, which causes many boost DC-DC converters to be implemented in a solar power plant application. The voltage doubler type boost DC-DC converter proposed in this paper is to simplify the circuit so that there is only one converter in a solar power plant application. This converter principle combines two conventional boost converters, which are integrated into one so that the power circuit and control circuit form become simpler. This proposal is verified through computation simulation and hardware design using the STM32F1038CT microcontroller for the final verification. The efficiency algorithm of the simulation is 99.7%, and the hardware experimental is 85.65%
Implementation of line detection self-driving car using HSV method based on raspberry pi 4 Florentinus Budi Setiawan; Eric Pratama Putra; Leonardus Heru Pratomo; Slamet Riyadi
JURNAL INFOTEL Vol 14 No 4 (2022): November 2022
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v14i4.801

Abstract

With the development of technology, especially in the field of robotics, daily human activities can be carried out with artificial intelligence. One of the artificial intelligence technologies that help ease the burden on humans, especially in terms of driving, is self-driving cars. In this case, self-driving cars have several methods with GPS systems, radar, lidar, or cameras. In this study, a self-driving car system was designed on a navigation path model using a street mark detector with an intermediary sensor, namely a camera as a vision sensor. This self-driving car system uses a prototype called an autonomous car to walk on a path which is a self-driving car navigation direction based on the detected line to be able to detect camera sensors that process line images from the camera using HSV. method. In this study, a self-driving car system has been successfully designed using a microcontroller, namely Raspberry Pi 4 as a programmer and L298n motor driver, BTS7960 as a driver for a self-driving car. The Raspberry Pi 4 sends real-time images through the camera as a vision sensor which then detects a line to navigate the movement of this self-driving car. By using image processing, the resulting level of precision can reach the average value according to the direction of the self-driving car.
Perancangan Automated Guided Vehicle Menggunakan Penggerak Motor DC dan Motor Servo Berbasis Raspberry Pi 4 Florentinus Budi Setiawan; Yosia Yovie Christian Wibowo; Leonardus Heru Pratomo; Slamet Riyadi
Jurnal Rekayasa Elektrika Vol 18, No 2 (2022)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v18i2.25863

Abstract

The influence of the industrial revolution 4.0 resulted in very significant changes. Many companies compete to produce robots that facilitate human work, in terms of energy and time in the process of producing goods. One of the robots being developed is the Automated Guided Vehicle (AGV), a vehicle with automatic control. AGV has high accuracy, easy maintenance, and a long operating time. This study discusses the design and implementation of AGV using 2 motors. The front motor using a servo motor is used for steering to turn right and turn left, while the rear motor in the form of a DC motor is used to regulate the speed of the AGV. The AGV movement system is controlled by computer vision. The AGV problem encountered is that the camera reading distance is close, which makes it less efficient in industrial use. This problem can be solved with a camera connected to a raspberry pi capable of capturing text and images from a distance of 100 cm. The use of computer vision makes the AGV robot easy to move. In this study, the accuracy of the movement of the AGV robot to the trajectory pattern has an average angle difference of 3.09°. The difference in the angle indicates a small error so that the AGV can operate optimally. Infield applications, this AGV is used in the manufacturing industry to move goods. Therefore, the use of AGV is needed because it has high accuracy and small error.
Penerapan Algoritma HSV pada Autonomous Car untuk Sistem Self-Driving Berbasis Raspberry Pi 4 Florentinus Budi Setiawan; Padang Ufqi Sutrisno; Leonardus Heru Pratomo; Slamet Riyadi
Jurnal Rekayasa Elektrika Vol 18, No 4 (2022)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v18i4.27495

Abstract

Perkembangan teknologi di sektor transportasi di masa ini semakin krusial. Sehingga perusahaan berinovasi menciptakan mobil yang dapat berjalan sendiri dengan tingkat keamanan yang tinggi. Pada penelitian ini, kami merancang sistem self-driving untuk mobil RC skala 1:10 menggunakan komponen utama berupa Raspberry Pi 4 sebagai pengolahan citra untuk kendali otomatis pada autonomous car. Untuk mengatur pergerakan roda belakang dan steering menggunakan motor DC. Penelitian ini menerapkan computer vision yang dipakai untuk sistem navigasi agar dapat berjalan sesuai dengan lintasan. Permasalahan yang dijumpai pada penelitian sebelumnya adalah masih mengambil sampel lintasan terlebih dahulu yang dirasa kurang efisien karena pada jalan yang belum diambil sampelnya tidak dapat dilalui robot tersebut. Untuk memecahkan permasalahan ini maka peneliti menerapkan algoritma HSV agar dapat mengikuti lintasan secara real-time. Algoritma HSV(hue, saturation, value) merupakan sistem untuk mendeteksi tepi garis lintasan dengan memproses gambar dari kamera Raspberry Pi.  Dari hasil kalibrasi nilai threshold yang digunakan adalah sebesar Hmin = 135 dan Hmax = 179, Smin = 70 dan Smax = 255, dan nilai V sebesar Vmin = 53 dan Vmax = 106 agar dapat mendeteksi jalur lintasan secara jelas, baik di dalam ruangan maupun diluar ruangan,  dan HSV toleran terhadap perubahan intensitas cahaya. Itulah keuntungan dari algoritma HSV. Berdasarkan hasil pengujian dan implementasi robot ini dengan menggunakan kecerdasan buatan dapat bekerja sesuai dengan algoritma yang sudah dibuat dengan tingkat akurasi deteksi jalur yang cukup tinggi.
Peningkatan Efisiensi Kinerja Switched Reluctance Motor dengan Metode Pergeseran Sudut Fasa Agata Dita Wardani; Slamet Riyadi; Leonardus Heru Pratomo; Florentinus Budi Setiawan
TEKNIK Vol 42, No 3 (2021)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v42i3.33970

Abstract

Penggerak listrik banyak digunakan pada kendaraan listrik, sebagai contoh adalah switched reluctance motor (SRM). SRM memiliki keunggulan seperti: kontruksi sederhana, perawatan mudah, performa tinggi, dan ramah lingkungan. Pengoperasian SRM membutuhkan kendali dan sensor. Deteksi posisi rotor umumnya menggunakan sensor hall effect yang akan menentukan interval eksitasi. Proses ini memiliki banyak kelemahan salah satunya adalah kepresisian. Peletakan sensor hall effect secara geometris memiliki kelemahan mencakup akurasi serta membatasi dalam pemberian eksitasi. Kelemahan peletakan sensor hall effect diantisipasi dengan rotary encoder sebagai deteksi posisi rotor. Alat tersebut memiliki tingkat kepresisian yang tinggi dan dapat mengatur sudut yang diperlukan agar lebih akurat dalam operasi SRM. Pemberian sudut eksitasi dapat dilihat dari karakteristik induktansi SRM. Sudut eksitasi yang tepat dapat menghasilkan torka optimum dan memaksimalkan kinerja SRM. Tujuan penilitian ini guna meningkatan efisiensi SRM menggunakan pergeseran sudut fasa eksitasi stator. Untuk mendukung hasil kajian dilakukan simulasi dan divalidasi dengan pengujian laboratorium. Hasil kajian menunjukkan kondisi optimal pada sudut θon= 5° θoff =20° menghasilkan arus puncak 1,2 A dan kecepatan 1650 RPM. Dari hasil tersebut diperoleh peningkatan efisiensi kinerja dengan pergeseran sudut fasa SRM terhadap torka, kecepatan dan arus yang dihasilkan.
Co-Authors Agata Dita Wardani Agengkarunia Cahyadi Wibawa Agutinus Fidelis Wibisono Alvin Martanio Arifin Wibisono Arifin Wibisono Eric Pratama Putra F. Budi Setiawan Farrel Adriantama Florentinus Budi Setiawan Florentinus Budi Setiawan Florentinus Budi Setiawan Florentinus Budi Setiawan Franciska Amalia Kurnianingsih Guntur Sumartin Laras Triefena Leonardus H. Pratomo LEONARDUS HERU PRATOMO Leonardus Heru Pratomo Leonardus Heru Pratomo Leonardus Heru Pratomo Lies Teddy Galang Ramadhan Nelson Roberto Duarte Padang Ufqi Sutrisno Phoa Marcellino Siva Rachmat Hidayat Shandy Jenifer Matitaputty Sulaiman Sulaiman Wibisono, Arifin Yanuarsyah Haroen Yosia Yovie Christian Wibowo