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Reseacher

Name TANAKA Yasuhiro
Official Title Professor
Affiliation Mechanical Systems Engineering, Science and Engineering
E-mail ytanaka@tcu.ac.jp
Web
  1. http://www.risys.gl.tcu.ac.jp/Main.php?action=profile&type=detail&tchCd=5001345
Profile Currently, I am researching and developing various types of measurement systems for space charge distributions formed in various solid dielectric materials at high temperature, under ultra-high electric field or under irradiation of electron-beam in vacuum. Using the developed measurement systems, I have revealed the relationship between a charge accumulation and electric breakdown in polyethylene and other polymeric materials. Especially, I am a specialist to research characteristics of so-called, “packet-like charge”, which is observed in polymeric materials under dc high electric field, and it significantly affects the breakdown strength of the polymeric materials. I also found that the adding of inorganic nano-size filler to polyethylene was effectively prevent the generation of the packet-like charge. The result contributed to develop an insulating material for dc power transmission cable. Furthermore, I have investigated the space charge accumulation characteristics in various materials at relatively high temperatures under relatively high electric fields, and the obtained results were effective to evaluate the insulating materials for power electric equipment.
Research Field(Keyword & Summary)
  1. (1) Space charge accumulation characteristics in various polyethylene-based materials for power cables

    Space charge accumulation characteristics in various polyethylene-based materials for DC power cables have been investigated using some originally developed measurement systems based on PEA (pulsed electro-acoustic) method. Using the systems, we could show that some newly developed insulating materials were available as a DC power cable. The research work has contributed to develop a DC power cable.

  2. (2) Space charge accumulation characteristics in various epoxy-based materials for power devices

    Space charge accumulation characteristics in various epoxy resin-based materials for power electronic devices have been investigated at relatively high temperature using some originally developed measurement systems based on PEA (pulsed electro-acoustic) method. Using the systems, we could show that some newly developed insulating materials were available as an insulating material for power electronic devices. The results are expected to be helpful to develop power electronic devices.

  3. (3) Space charge accumulation characteristics in various imide-based materials for motor windings

    Space charge accumulation characteristics in various imide-based materials for motor windings have been investigated using some originally developed measurement systems based on PEA (pulsed electro-acoustic) method. Using the systems, it is expected to evaluate a newly developed insulating material as an insulating material for motor windings under high voltage. The results are expected to be helpful to develop a motor driven under high voltage.

  4. (4) Evaluation of insulating performance at high temperature under high electric field using a direct current integrated charge (Q(t)) method.

    Evaluation of electric insulating material under high electric field at high temperature is tried using a direct current integrated charge (Q(t)) method. Using this system, we can estimate an available range of electric field and temperature for insulating materials. It is helpful to select a suitable insulating material for high voltage power devices.
Representative Papers
  1. K. Matsui, Y. Tanaka, T. Takada, T. Fukao, K. Fukunaga, T. Maeno and J.M. Alison, “Space Charge Behavior in Low-density Polyethylene at Pre-breakdown”, IEEE Trans. DEI, Vol. 12, No. 3, pp. 406-415, 2005 Citation 167 (2018.11.29) (Scopus) IF 1.774
  2. K. Matsui, Y. Tanaka, T. Takada and T. Maeno, “Numerical Analysis of Packet-like Charge Behavior in Low-density Polyethylene under DC Electric Field”, IEEE Trans. DEI, Vol. 15, No. 3, pp. 841-850, 2008 Citation 46 (2018.11.29)(Scopus) IF 1.774
  3. Y. Hayase, H. Aoyama, K. Matsui, Y. Tanaka, T. Takada and Y. Murata, “Space Charge Formation in LDPE/MgO Nano-composite Film under Ultra-high DC Electric Stress”, IEEJ Trans. FM, Vol. 126, No. 11, pp. 1084-1089, 2006 Citation 60 (2018.11.29)(Scopus)
  4. Y. Tanaka, T. Fujitomi, T. Kato, H. Miyake, H. Mori, S. Kikuchi, Y. Yagi, “Packet-like Charge Formation in Cable Insulating Materials at Polarity Reversal”, IEEE Trans. DEI, Vol. 24, No. 3, pp.1372-1379, June 2017 Citation 3 (2018.11.29)(Scopus) IF 1.774
  5. J. Li, X. Kong, B. Du, K. Sato, S. Konishi, Y. Tanaka, H. Miyake, T. Takada, "Effects of High Temperature and High Electric Field on the Space Charge Behavior in Epoxy Resin for Power Modules", IEEE Trans. DEI, Vol. 27, No. 3, pp. 832-839, 2020
  6. Y. Kishi, T. Hashimoto, H. Miyake, Y. Tanaka and T. Takada, "Breakdown and Space Charge Formation in Polyimide Film under DC High Stress at Various Temperatures", Journal of Physics Conference Series Vol. 183, 012005, 2009
  7. T. Ishii, T. Takiwaki, H. Miyake, T. Tanaka, T. Takada and T. Tanaka, "Space Charge Formation in Polyimide Film under High DC Voltage at High Temperatures", IEEJ Trans. FM, Vol. 133, No. 3, pp. 105-110, 2013
  8. T. Takada, T. Fujitomi, T. Mori, T. Iwata, T. Ono, H. Miyake, Y. Tanaka, "New Diagnostic Method of Electrical Insulation Properties based on Current Integration", IEEE Trans. DEI, Vol. 24, No. 4 , pp. 2549-2558, 2017
Award ･Excellent Paper Award from the IEE of Japan in 2009 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　･the IEC1906 Award in 2013　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　･Liu Ziyu Memeorial Lecture Award in 2018　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　･IEEE Caixin Sun and Stan Grzybowski Lifetime Achievement Award in 2018　　　　　　　　　　　　　　　　　　　　　　　　　　　　　･Academic Contribution Award from the Society of Fundamental and Materials in IEE of Japan in 2019　　　　　　　　　　　　　　　　　　　　　　　　　　　　　･IEEJ Outstanding Contribution Award in 2021
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS) https://nrid.nii.ac.jp/ja/nrid/1000030227186/
Research Grants/Projects including subsidies, donations, grants, etc. We have many experiences of collaborations with many manufacturing companies for materials and devices. (It is too many to show all here.)
Recruitment of research assistant(s) Yes (one people)
Affiliated academic society (Membership type) ･IEEE (Member) 　　　　　　　　　　　　　　　　･IEE of Japan (Senior Member) 　　　　　　　　　　　　　　　　　　　　　　　　･IEC (Convener of a working groupe) ･CIGRE (Member) ･IEED in Japan (Chair)
Education Field (Undergraduate level) ･ Physics of Electronics and Exercise (a)
･ Physics of Electronics and Exercise (b)
･ SD-PBL(2)
･ Electric Circuits and Exercise
･ Electronic Circuits
･ Measurement and Instrumentation
･ Experiments on Mechanical System Application
･ Engineering and Ethics
Education Field (Graduate level) ･ Electronic Measurement, Adv.

Affiliation