The 2nd Prize Paper Award at IPEC2026

Tamura Corporation (Headquarters: Nerima-ku, Tokyo; President and COO: Mitsutaka Nakamura; hereinafter referred to as "the Company") announces that a paper presented by a researcher from its Sendai Advanced Laboratory has received the 2nd Prize Paper Award at the IEEE International Power Electronics Conference (Integration of Power conversion, Electric machine, and Control ASIA, hereinafter "IPEC 2026") (Note 1).

The award-winning paper, titled “Development of Low Leakage Inductance Transformer Using Multilayer Flexible Printed Circuit Folding Coil,” presents the results of Japan’s MEXT “Innovative Power Electronics Creation Core Technology Research and Development Project” (Note 2), led by Tohoku University, in which the Company participates. A researcher from the Sendai Advanced Laboratory served as the first author and the paper was presented at IPEC 2026, held in Nagasaki, Japan, from May 31 to June 4, 2026. The multi-layer flexible printed circuit board coil presented in this study incorporates the Company’s proprietary board lamination technology, and the paper was highly recognized for the following achievements:

  1. １．Achieved a reduction in leakage inductance to one-thirtieth that of conventional wound planar transformers with comparable characteristics by employing a planar coil.
  2. ２．Reduced substrate area by 20% through layer interconnection using folded flexible printed circuit boards without through-hole vias.
  3. ３．uccessfully reduced switching surge voltage to 250 V—well below the 650 V withstand voltage limit of GaN-HEMT devices—by applying the developed low-leakage-inductance transformer in a 1.6 kW single-phase AC/DC direct converter equipped with GaN-HEMT devices.

20260619_01.webp 20260619_02.webp
The awards ceremony (left) and the certificate of commendation (right)


The Sendai Advanced Laboratory is engaged in collaborative research with Tohoku University to develop differentiated magnetic passive components and power module insulation materials at the material level, aiming for high efficiency, high power, and high-frequency operation compatible with wide bandgap (WBG) semiconductors. Under the 14th Medium-Term Management Plan, “One TAMURA for Next 100”, the Company positions the clean energy market as a key focus area. Aiming to realize a carbon-neutral society, the Company will continue striving to establish a solid technological foundation to support its next 100 years and to create new pillars of business.
  1. 　Note1:　 IPEC 2026 was held at Dejima Messe Nagasaki from May 31 to June 4, 2026.
  2. IPEC2026 Website
  3. 　Note2:　 Part of this research was conducted with support from the Tohoku University CIES Consortium.


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【About Tamura Corporation】

Tamura Corporation began as a manufacturer and seller of radios and electronic components and has since expanded its offerings to include transformers and reactors, solder pastes, solder mask, automatic soldering systems, and audio mixing consoles for broadcasting stations.
Tamura Corporation is listed on the Tokyo Stock Exchange Prime Market (StockCode:6768).
Contact：Corporate Communications

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