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All Journal ELPOSYS: Jurnal Sistem Kelistrikan
Anang Dasa Nofvowan
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Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering

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Uji Performa Trafo E-I dengan Variasi Rapat Fluks pada Sumber Tegangan Non-Sinusoidal Slamet Nurhadi; Anang Dasa Nofvowan; Ika Noer Syamsiana; Yanik Lailinas Sakinah; Masramdhani Saputra; Mochammad Nur Rochman
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 3 (2023): ELPOSYS vol. 10 no. 3 (2023)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v10i3.4547

Abstract

In the industrial field, transformers are used as a step-up voltage and are used as a step-down level. In a loaded transformer, the power that comes out of the transformer (transformer output power) is not always 100% because there are losses when channeling to the load. Both losses caused by current flowing in the copper wire, losses caused by alternating flux in the iron core, and losses caused by Eddy current in the iron core which result in the outgoing power (output power) from the transformer to the load is not the same as the incoming power (input power) to the transformer. This is known as the efficiency of the transformer. From these problems, the solution offered is to design and implement a transformer using an EI-shaped iron core which is arranged alternately which aims to prevent the occurrence of Eddy Current what happens in the coresolid by applying to the inverter. From the test results of the transformer, it can be concluded that the difference in flux density in the transformer when it is loaded will affect efficiency. The smaller the flux density of the transformer, the better the efficiency, while the greater the flux density of the transformer, the lower the efficiency.
Pengaruh Variasi Proses Annealling Pada Performa Core Losses Trafo 1 Fasa E-I Nurhadi, Slamet; Anang Dasa Nofvowan; Satria Luthfi Hermawan; Binar Surya Gumilang
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 2 (2025): ELPOSYS vol. 12 no. 2 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i2.7291

Abstract

Transformers have key role in converting voltage level to suit several applications, ranging from industries to residential areas. As part of the local content product production initiated by the government, it is essential to identify the material quality to yield good performance. Therefore, developing a well-designed core material is substantial to prevent excessive transformers core losses during operation. The core losses performance due to the annealing process of the silicon steel core is presented in this research. The E-I core shape is chosen to imitate the existing distribution transformers. The design aims for the optimal core losses of the EI transformers. The design process involves the selection of the iron core and calculating the number of coil turns on the primary and secondary sides. Based on experimental results, under the same number of winding turns, no significant change in transformers impedance due to the annealing process duration. Testing with a nichrome wire load shows that Transformers 1, with a flux density of 1, achieves efficiency and voltage regulation close to 100%. The second test with the addition of a rectifier indicates a decrease in efficiency and regulation, with Transformers 3 and a flux density of 1,6 providing the best results. The research findings show that a smaller flux density in transformer results in better efficiency and regulation for AC output, while a larger flux density supports better efficiency and voltage regulation for DC output. These findings can serve as a guide in designing EI Transformers for optimal battery charging systems.
Co-Authors Binar Surya Gumilang Masramdhani Saputra Mochammad Nur Rochman Nurhadi, Slamet Satria Luthfi Hermawan Slamet Nurhadi Yanik Lailinas Sakinah