The simulation of a new high frequency transformer

Year 2022, Volume: 6 Issue: 2, 322 - 337, 30.06.2022

Sude Hatem , Erol Kurt

https://doi.org/10.30521/jes.1123925

Cited By: 1

Abstract

Core losses of transformers motivate many engineers and scientists to design and implement different transformers for their specific aims. Since there exists a growing interest on high frequency applications in today’s world, design and optimization studies of a magnetic fluid core transformer (MFCT), having an easy and cheap production approach in high frequency applications, are considered in the present paper. The desired design should operate in a more efficient way within a wide frequency band. The MFCT considered here can be a solution to the eddy currents and core losses encountered in the conventional transformers with its low conductivity, oil-based magnetic fluid and super paramagnetic characteristic. The magnetic fluid in the proposed work consists of a combination of ferromagnetic particles made by iron in an averaged diameter of 70 µm with an adjustable magnetism compared to the traditional magnetic fluids and an engine oil, thereby the magnetic permeability of the overall fluid core can be fully adjustable by the variation of mass proportion between the oil and iron powder as an easy process without any chemical process. A COMSOL Multi-Physics design is performed via a finite element package in three dimensions. It is proven that the iron particles exhibit a complicated pattern inside the engine oil and produce a well-defined high frequency output at the secondary windings in a wide range of frequency.

Keywords

Core, Ferrofluid, High frequency, Magnetic fluid, MHz, Power, Transformer

References

• [1] Erickson, RW. Fundamentals of Power Electronics, 2nd Edition. Norwell, Massachusetts USA: Springer International Edition, 2001.
• [2] Colonel, W, McLyman, T. Transformer and Inductor Design Handbook, 3rd edition. New York U.S.A: Marcel Dekker, 2004.
• [3] Balcı, S. Nanokristal nüve malzemesi ile orta frekans güç transformatörünün analizi, tasarımı ve gerçekleştirilmesi [Analysis, design and realization of medium frequency power transformer with nanocrystalline core material] (PhD). Gazi Üniversitesi, Ankara, Turkey, 2016.
• [4] Kul, S, Iskender I, Balci, S. FEA Simulation of the Electromagnetic Effects on the Flux Distribution of the Joints in the Transformer Core Structure. In: ISMSIT 2018 2nd International Symposium on Multidisciplinary Studies and Innovative Technologies; 2018: IEEE, pp. 1-5, doi: 10.1109/ISMSIT.2018.8566684.
• [5] Isa, M Z, Kadir, A, Gomes, C, Azis, N, Izadi, M, Alyozbaky, OSH. Analysis on magnetic flux density and core loss for hexagonal and butt-lap core joint transformers. In: SPEC 2016 IEEE 2nd Annual Southern Power Electronics Conference; 5-8 Dec 2016: IEEE, Auckland, New Zealand, pp. 1-4.
• [6] Tomczuk, B, Koteras, D. Magnetic flux distribution in the amorphous modular transformers. Journal of Magnetism and Magnetic Materials 2011; 323(12): 1611-1615. DOI:10.1016/j.jmmm.2011.01.007.
• [7] Yıldırız, E, Aydemir, MT. Küçük güçlü bir rüzgar jenaratöründe kullanım için eksenel akıllı bir sürekli mıknatıslı motorun analizi, tasarımı ve gerçekleştirilmesi [Analysis, design and realization of an axial intelligent permanent magnet motor for use in a small powerful wind generator]. Gazi Üniv.Müh.Mim.Fak.Dergisi 2009; 24 (3): 525-531.
• [8] Hasegawa, R, Azuma, D. Impacts of amorphous metal-based transformers on energy efficiency and environment, Journal of Magnetism and Magnetic Materials 2008; 320 (20): 2451-2456. DOI: 10.1016/j.jmmm.2008.04.052
• [9] Hasegawa, HWNg, Lee, RAC, Lowdermilk, LA. Amorphous alloy core distribution transformers. In: Proceedings of the IEEE 1991; 79 (11):1608-1623. DOI: 10.1109/5.118984.