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All Journal Mesin Bulletin of Islamic Research
Indra Nurhadi
Unknown Affiliation
Religion Humanities Education Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering

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CIRI GETARAN MEKANIK DAN ARUS CATU PADA MOTOR LISTRIK INDUKSI 3-FASA AKIBAT EKSENTRISITAS CELAH UDARA Indra Nurhadi; Andi Isra Mahyuddin; M Ahmarudin
Mesin Vol. 16 No. 1 (2001)
Publisher : Mesin

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Abstract

This paper discusses theoretical and experimental study to determine the signature of stator supply current and stator vibration of 3-phase induction motor resulting from airgap eccentricity. Based on the theoretical study it can be formulated that the signature due to eccentricity is affected by number of slots on the rotor and the stator as well as slip, defined as "Principal Slot Harmonics (PSH)" and "Dynamics Eccentricity Components (DEC)". To study its feasibility for practical use a set of experiments was performed and the predicted signature was identified. Using the test rig, it was demonstrated that the magnitude of PSH and DEC in stator current and body vibration increase due to eccentricity.
PREDIKSI TINGKAT KERUSAKAN BATANG ROTOR PADA MOTOR INDUKSI BERDASAR ANALISIS CIRI ARUS CATU DAN CIRI GETARANG Indra Nurhadi; Zainal Abidin; Haris Darmawan
Mesin Vol. 16 No. 3 (2001)
Publisher : Mesin

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Typically, mechanical vibration signature analysis is one of the essential steps in predictive maintenance activity for rotating machines. This paper discusses a study on the use of motor current signature analysis as a complement to the vibration signature analysis in identifying broken rotor bar in 3-phase induction motors. From literature study[5, 6, 7, 8, 9, 10, 11], it was summarized that the presence of rotor bar faults can be detected through the increase in (1x rpm ± Fs x p) side-bands amplitude of mechanical vibration. In addition, this type of fault is also signified by the increase in (1 ± 2s)Fl side-bands amplitude of motor current. Furthermore, the amplitude of the left side-band of supply current spectra can be used to estimate fault severity.To prove the validity of the theory and to study its feasibility for practical use, experimentation was conducted using a small 2-pole motor of ¼ hp, coupled with a generator. Spectral analysis performed on motor current and body vibration shows results as predicted by the theory.
Bibliometric Analysis of Social Support for Children's Mental Health in the Perspective of Islamic Education Arfan, Fahmi; Muhammad Raffa; Indra Nurhadi
Bulletin of Islamic Research Vol. 1 No. 2 (2023)
Publisher : Educational Foundation for Qur'anic Exegesis and Hadith Studies (Yayasan Pendidikan Tafsir Hadis)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69526/bir.v1i2.340

Abstract

This study aims to find out about social support for children's mental health in the perspective of Islamic education in publications indexed by the Scopus database. This study uses bibliometric analysis techniques to explore all publications indexed in the scopus database on social support for children's mental health in the perspective of Islamic education from 1976 to 2023. The data obtained by the analysis used excel and R/R studio. VOSviewer is used to perform a visual analysis of the appearance of keywords and document citations in a stimulating manner. The researchers found 569 publications that corresponded to the subject's function and the criteria set. The results of this study show an annual growth rate of 8.2% with the most publications in 2020. Iran is the country that contributes the most publications with the Iranian Ministry of Health and Medical Education affiliated. The bibliometric analysis carried out was limited to scopus data. Other national and international databases were not taken into account in this research. This study presents a brief overview of the literature accessible to researchers working in the fields of education and psychology and provides recommendations for future research.
Co-Authors Abd. Rasyid Syamsuri Arfan, Fahmi Haris Darmawan M Ahmarudin Muhammad Raffa Zainal Abidin