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All Journal Journal of Physics and Its Applications Jurnal Pengabdian Masyarakat Teknik Advance Sustainable Science, Engineering and Technology (ASSET) Journal of Innovation and Community Engagement PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Tanra, Ivan
Krida Wacana Christian University (UKRIDA)
Arts Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics Social Sciences Other

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Journal : Journal of Physics and Its Applications

 1 
Transduction matrix to enable sensor-less application of DC motor Ivan Tanra; Shih-fu Ling
Journal of Physics and Its Applications Vol 1, No 2 (2019): May 2019
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v1i2.4627

Abstract

Sensorless technology is one of the popular topic in motor industry. The aim is to reduce number of sensor and sensor size in the system. One of the method to achieve this sensor-less application of a motor is thru transduction matrix method. Transduction matrix is a 2x2 matrix that show the relationship between electrical input and mechanical output  of the motor. By obtaining the transduction matrix of a chosen motor, the mechanical output of the motor can be calculated from its electrical input. This paper explains the theory behind and the method to obtain the transduction matrix of a DC motor. The DC motor is chosen because it is the common motor in industry.
Enhancement of Laser-Induced Breakdown Spectroscopy (LIBS) Sensitivity Using Electric Fields: A Study on Non-Metal Samples Tanra, Ivan; Limanto, Agus; Hadiyanto, Marvin Yonathan; Karnadi, Indra
Journal of Physics and Its Applications Vol 7, No 2 (2025): May 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i2.25558

Abstract

Laser-induced breakdown spectroscopy (LIBS) has proven to be a versatile and effective technique for elemental analysis across a variety of fields, including geology, archaeology, materials science, nuclear power, and medicine. This study focuses on the application of an external electric field to enhance the performance of LIBS, specifically for non-metal samples such as black coral. By introducing an electric field and varying laser energy levels, the effects on plasma generation and emission intensities were investigated. The experimental results demonstrate that applying an electric field significantly enhances spectral intensity, with notable improvements in the Carbon (C I) emission line at 247.8 nm. The enhancement was observed to be nonlinear, with significant increases only when the electric field strength exceeded 200 V/cm. Laser energy was also found to play a critical role, with carbon signals only detectable at energies above 20 mJ, and optimal results achieved at 50 mJ. These findings highlight the combined effect of laser energy and electric field strength in enhancing LIBS sensitivity, particularly for detecting trace elements in organic samples. This approach offers a simple, efficient, and effective method to improve LIBS performance, with potential applications in fields such as fossil age determination and other analytical studies requiring high sensitivity.
Co-Authors Agus Limanto Alfianto, Ade Septian Anggi Eka Safitri Budi Harsono Florensa Rosani Purba Hadiyanto, Marvin Yonathan Hanggara, Pramudita Hasudungan, Aswin Oktavian Indra Karnadi Iwan Aang Soenandi Johansah Liman Karnadi, Indra Nani Djohan Purnama, Louis Putra Shih-fu Ling Sutikno, Yusak