LLC resonance power transformers using magnetoplated wire

Article type: Research Article

Authors: Bu, Yinggang^{a; *} | Nishiyama, Masahiro^a | Yamamoto, Tatsuya^a | Mizuno, Tsutomu^a | Tsuchiya, Shigeaki^b

Affiliations: [a] Faculty of Engineering, Shinshu University, Nagano, Japan | [b] TOTOKU Electric Co., Ltd., Shinbashi 6-Chome, Minato-ku, Tokyo, Japan

Correspondence: [*] Corresponding author: Yinggang Bu, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano, Japan. Tel.: +81 26 269 5181; Fax: +81 26 269 5215; E-mail: buyinggang@shinshu-u.ac.jp

Abstract: The use of magneto-plated wire (MPW) allows for reduction of winding loss component from the proximity effect. compared with a copper wire (COW). A MPW is a COW with a circumference that is plated with a magnetic thin film. In this paper, we clarify the basic characteristics and the efficiency characteristics of a transformer using a MPW and a COW. We found that the resistances of a primary coil made of COW and MPW at a frequency f=500 kHz are 1.56 Ω and 1.12 Ω, respectively, and decreased 28%. The short circuit inductances of the COW and the MPW at a frequency f=500 kHz are 26 μH and 29.6 μH, respectively, and increased 13.8%. The efficiencies of an LLC resonant converter using the COW and the MPW at a frequency f=500 kHz are 90.2% and 92.2%, respectively, and increased 2%.

Keywords: Magnetoplated wire, copper wire, AC resistance, LLC resonance, transformer

DOI: 10.3233/JAE-140070

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 47, no. 3, pp. 719-727, 2015