• 430 Citations
  • 11 h-Index
20052020

Research output per year

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Research Output

  • 430 Citations
  • 11 h-Index
  • 55 Conference contribution
  • 36 Article
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Article
2020

Effects of secondary leakage inductance on the LLC resonant converter

Noah, M., Shirakawa, T., Umetani, K., Imaoka, J., Yamamoto, M. & Hiraki, E., Jan 2020, In : IEEE Transactions on Power Electronics. 35, 1, p. 835-852 18 p., 8691610.

Research output: Contribution to journalArticle

2019

Receiving-coil structure reducing stray AC resistance for resonant coupling wireless power transfer

Umetani, K., Honjo, T., Koyama, T., Ishihara, M. & Hiraki, E., Aug 7 2019, In : IET Power Electronics. 12, 9, p. 2338-2344 7 p.

Research output: Contribution to journalArticle

2018
9 Citations (Scopus)
2 Citations (Scopus)

Lagrangian dynamics model and practical implementation of an integrated transformer in multi-phase LLC resonant converter

Noah, M., Umetani, K., Imaoka, J. & Yamamoto, M., Feb 20 2018, In : IET Power Electronics. 11, 2, p. 339-347 9 p.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Magnetic Design and Experimental Evaluation of a Commercially available Single Integrated Transformer in Three-phase LLC converter

Noah, M., Kimura, S., Imaoka, J., Martinez, W., Endo, S., Yamamoto, M. & Umetani, K., Jul 14 2018, (Accepted/In press) In : IEEE Transactions on Industry Applications.

Research output: Contribution to journalArticle

8 Citations (Scopus)
5 Citations (Scopus)

Proposal for the new control method having high responsiveness and robustness for the boost-type DC-DC converter

Kawakami, T., Harada, T., Yamamoto, M. & Umetani, K., Jan 1 2018, In : IEEJ Transactions on Electronics, Information and Systems. 138, 4, p. 395-404 10 p.

Research output: Contribution to journalArticle

Winding orientation method to minimise the secondary leakage of a gapped transformer utilised in LLC resonant converter

Noah, M., Umetani, K., Yamamoto, M. & Imaoka, J., Feb 8 2018, In : Electronics Letters. 54, 3, p. 157-159 3 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
2017

A Current Sharing Method Utilizing Single Balancing Transformer for a Multiphase LLC Resonant Converter with Integrated Magnetics

Noah, M., Endo, S., Ishibashi, H., Nanamori, K., Imaoka, J., Umetani, K. & Yamamoto, M., Nov 23 2017, (Accepted/In press) In : IEEE Journal of Emerging and Selected Topics in Power Electronics.

Research output: Contribution to journalArticle

11 Citations (Scopus)
10 Citations (Scopus)

Total volume evaluation of high-power density non-isolated DC-DC converters with integrated magnetics for electric vehicles

Martinez, W., Cortes, C., Yamamoto, M., Imaoka, J. & Umetani, K., Nov 17 2017, In : IET Power Electronics. 10, 14, p. 2010-2020 11 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)
2016
11 Citations (Scopus)
5 Citations (Scopus)

Magnetic analysis, design, and experimental evaluations of integrated winding coupled inductors in interleaved converters

Imaoka, J., Umetani, K., Kimura, S., Martinez, W., Yamamoto, M., Arimura, S. & Hirano, T., 2016, In : IEEJ Journal of Industry Applications. 5, 3, p. 276-288 13 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Quasi-duality between SS and SP topologies of basic electric-field coupling wireless power transfer system

Ishihara, M., Umetani, K., Umegami, H., Hiraki, E. & Yamamoto, M., Dec 8 2016, In : Electronics Letters. 52, 25, p. 2057-2059 3 p.

Research output: Contribution to journalArticle

11 Citations (Scopus)

Time evolution of an urban heat island from high-density observations in Kyoto city

Iizawa, I., Umetani, K., Ito, A., Yajima, A., Ono, K., Amemura, N., Onishi, M. & Sakai, S., 2016, In : Scientific Online Letters on the Atmosphere. 12, 1, p. 51-54 4 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2015

A magnetic structure integrating differential-mode and common-mode inductors with improved tolerance to DC saturation

Umetani, K., Tera, T. & Shirakawa, K., 2015, In : IEEJ Journal of Industry Applications. 4, 3, p. 166-173 8 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Evaluation of the lagrangian method for deriving equivalent circuits of integrated magnetic components: A case study using the integrated winding coupled inductor

Umetani, K., Imaoka, J., Yamamoto, M., Arimura, S. & Hirano, T., Jan 1 2015, In : IEEE Transactions on Industry Applications. 51, 1, p. 547-555 9 p., 6828711.

Research output: Contribution to journalArticle

22 Citations (Scopus)

Lagrangian-based derivation of a novel sliding-mode control for synchronous buck converters

Umetani, K., Yamamoto, M. & Hiraki, E., 2015, In : IEEJ Journal of Industry Applications. 4, 6, p. 728-729 2 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
6 Citations (Scopus)

Simple flux-based Lagrangian formulation to model nonlinearity of concentrated-winding switched reluctance motors

Umetani, K., Yamamoto, M. & Hiraki, E., Nov 19 2015, In : Electronics Letters. 51, 24, p. 1984-1986 3 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
2014

A unidirectional boost chopper with snubber energy regeneration using a coupled inductor

Umetani, K., Iwamoto, F. & Yagyu, K., May 2014, In : IEEJ Transactions on Electrical and Electronic Engineering. 9, 3, p. 315-323 9 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2013
8 Citations (Scopus)
2012
20 Citations (Scopus)
2009

A practical pyrgeometer using the representative angle

Sakai, S., Ito, A., Umetani, K., IIzawa, I. & Onishi, M., May 15 2009, In : Journal of Atmospheric and Oceanic Technology. 26, 3, p. 647-655 9 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

都市気象観測実験システムの開発研究 (共著)

Umetani, K., 2009, In : 天気. 56, 5, p. 337-351 15 p.

Research output: Contribution to journalArticle

2007

局地気象のための微気圧計の開発

Umetani, K., 2007, In : 天気. 54, 3, p. 215-224 10 p.

Research output: Contribution to journalArticle

2005

A new technique of radiation thermometry using a consumer digital camcorder: Observations of red glow at Aso volcano, Japan

Saito, T., Sakai, S., Iizawa, I., Suda, E., Umetani, K., Kaneko, K., Furukawa, Y. & Ohkura, T., 2005, In : Earth, Planets and Space. 57, 2, p. e5-e8

Research output: Contribution to journalArticle

Open Access
12 Citations (Scopus)