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All Journal BERNAS: Jurnal Pengabdian Kepada Masyarakat Andalas Journal of Electrical and Electronic Engineering Technology Jurnal ELTEK
Rifa'i, Muhamad
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Religion Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Control & Systems Engineering Dentistry Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Neuroscience Nursing Public Health Social Sciences Veterinary Other

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Pengaruh waktu ton SPWM terhadap tegangan inverter sinusoida Luqman, Mohammad; Rifa'i, Muhamad; Radianto, Donny
JURNAL ELTEK Vol. 22 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/eltek.v22i1.4911

Abstract

Kendaraan listrik selain membutuhkan daya berbentuk sinusoida dengan daya besar dan frekuensi variable, juga membutuhkan pengaturan tegangan atau tegangan yang stabil. Alat untuk mengubah daya dc menjadi daya ac disebut dengan inverter. Penelitian ini merupakan kelanjutan dari penelitian yang terdahulu, Pada penelitan ini dicoba untuk mencari hubungan antara panjang waktu t-on pada sinyal SPWM dengan besaran tegangan sinusoida yang dihasilkan, yang akan digunakan untuk membuat rangkaian kontrol agar tegangan relatif stabil pada nilai tertentu pada rentang daya yang lebih lebar. Cara yang dilakukan adalah dengan menambah lebar pulsa pada sinyal SPWM, artinya memperpanjang waktu ON pulsa PWM (t-on) sebagai fungsi luaran tegangan inverter. Jika tegangan inverter menurun maka sistem akan maenambah waktu t-on sebagai fungsi sudut sinyal sinusoida. Penambahan besaran sudut adalah sebesar 0o sampai dengan 10o untuk rentang tegangan 220V sampai 190V. Hasil yang diperoleh adalah pengaturan tegangan inverter akan akan meningkat sebesar 6% dibandingkan jika tanpa menggunakan sistem ini.   ABSTRACT Electric vehicles require stable voltage or voltage regulation, as apart from requiring sinusoidal power with large power and variable frequency.  A device for converting DC power into AC power is called an inverter. This research is a continuation of previous research. In this research, an attempt is made to find a relationship between the length of the t-on time on the SPWM signal and the magnitude of the resulting sinusoidal voltage, which will be used to create a control circuit so that the voltage is relatively stable at a certain value in the specified power range wider. The method used is to increase the pulse width of the SPWM signal, which means extending the ON time of the PWM pulse (t-on) as a function of the inverter voltage output. If the inverter voltage decreases, the system will increase the t-on time as a function of the sinusoidal signal angle. The additional angle magnitude is 0o to 10o for the voltage range 220V to 190V. The results obtained are that the inverter voltage setting will increase by 6% compared to without using this system.
Penerapan IPTEK dalam Upaya Peningkatan Penjualan Kuliner melalui Digitalisasi Sertifikat Halal dan E-Commerce Lestari, Elly; Sa'diyah, Ana Arifatus; Rifa'i, Muhamad
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 4 (2024)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v5i4.10642

Abstract

Usaha Mikro Kecil dan Menengah (UMKM) merupakan suatu usaha yang dilakukan oleh perorangan atau badan usaha milik perorangan. UMKM Kuliner berkembang cukup pesat saat ini. Hasil penjualan produk yang dilakukan mengalami peningkatan setiap bulannya. Pelaksanaan program ini berdampak terhadap meluasnya nama brand UMKM di mata masyarakat dengan digitalisasi sertifikat halal dan e-commerce. Digitalisasi sertifikat halal dan e-commerce meningkatkan angka penjualan mitra dan meningkatkan perekonomian mitra
Performance Enhancement of Liquid Filling Process Using Feedforward-Feedback PID Control under DCS Environment Dwi Risdhayanti, Anindya; Ayu Permatasari, Dinda; Rifa'i, Muhamad; Sandra Asti, Irfin
Andalas Journal of Electrical and Electronic Engineering Technology Vol. 5 No. 2 (2025): November 2025
Publisher : Electrical Engineering Dept, Engineering Faculty, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/ajeeet.v5i2.185

Abstract

This study presents the implementation of a Feedforward-Feedback Control method on a Distributed Control System (DCS) Siemens SIMATIC PCS7-based liquid filling process to enhance system stability, response speed, and control accuracy. One of the main challenges in industrial process control is disturbances that cause deviations from the desired setpoint. To address this, a control strategy combining feedforward and feedback actions was developed to anticipate and correct process variations in real time. The system adopts a Multi-Input Multi-Output (MIMO) architecture with two main control variables: liquid level and reactor temperature. Flow rate and liquid level measurements were obtained using the Waterflow YF-S401 and Ultrasonic HC-SR04 sensors, both demonstrating a linear relationship between output voltage and the measured physical quantities, with stable real-time responses displayed on the HMI. The PID controller parameters were tuned using the built-in PID Tuner, yielding Kp = 50, Ki = 150.329, and Kd = 0. Experimental results show that the feedforward-feedback approach reduced the settling time from 78 seconds to 50 seconds and decreased the steady-state error from ±3.8% to ±1.2%. In temperature control, the system successfully reached the operating point of 50 °C with less than 1% steady-state error and a settling time of approximately 60 seconds. The system was configured with AI, AO, DI, DO modules and PROFINET communication, programmed using Sequential Function Chart (SFC) and Continuous Function Chart (CFC). The results demonstrate that the feedforward-feedback control significantly improves process performance and offers strong potential for application in larger-scale industrial automation systems.
Co-Authors Anang Lubis, Mohammad Agustinus Saputra Audiana, Virna Umro Dwi Risdhayanti, Anindya Elfrida Ratnawati Elly Lestari Indrazno Siradjuddin Luqman, Mohammad PERMATASARI, DINDA AYU Radianto, Donny Sadiyah, Ana Arifatus Sandra Asti, Irfin