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Reseacher

Name HIJIKATA Kimio
Official Title Lecturer
Affiliation Depertment of Mechanical Systems Enginnering
E-mail khijikat@tcu.ac.jp
Web
  1. http://www.eml.mse.tcu.ac.jp/
  2. https://www.risys.gl.tcu.ac.jp/Main.php?action=profile&type=detail&tchCd=5001925
Profile We are interested in developing high-value-added electric machinery and magnetic levitation systems. We had proposed and developed new structures such as cylindrical shape thrust magnetic bearings and bearingless vernier motors. Cylindrical shape thrust magnetic bearings that suitable for high-speed rotating applications are very compact and very easy to manufacture compared to conventional thrust magnetic bearings with rotors that have large diameter disk shapes. Bearingless vernier motors are developed for magnetic levitation systems for high-torque and low-speed operation. Bearingless motors have less torque compared to normal motors because these motors cannot use mechanical gears. Proposed bearingless vernier motors have improved torque by magnetic gear effect applying the magnetic modulation technique. Furthermore, recently, We proposed a new synchronous motor that rotates its rotor faster than its rotating magnetic field by applying the magnetic modulation technique.
Research Field(Keyword & Summary)
  1. (1) Bearingless motors

    Bearingless motors are a kind of magnetic levitation system, and which combined both of function of torque generation and suspension force generation with a single stator core. Bearingless motors are suitable for systems that require high-speed rotation, high-clearness environments such as food processing, medical applications, and semiconductor manufacturing because without mechanical friction and lubrication. The current main research topics are simplifications of the system for putting into practical use, improving levitation stability, and analyze a new electromagnetic structure with vernier effect.

  2. (2) Speed-up type vernier motor

    This new type of synchronous motor that I proposed is the only motor that has the feature that the rotor rotates at a speed faster than the rotating magnetic field. This new type of motor has an inherent aptitude for high-speed rotating applications. Additionally, this type of motor enables to minimize the volume and to improve power density compared to conventional synchronous motors. The current main research topics are analyzing motor characteristics and making optimally designed prototypes.
Representative Papers
  1. (1) Keigo Sekita, Kimio Hijikata, Yasuhiro Tanaka, "Reluctance Motor rotate at a Faster Rate than Rotating Magnetic Field", Journal of the Japan Society of Applied Electromagnetics and Mechanics, ※In progress, accepted.
  2. (2) Kanako Minami, Takahiro Sekine, Kimio HIjikata, Yasuhiro Tanaka, "Study of Relationship Magnetic Poles and Motor Winding Poles of PM type Bearingless Vernier motor", Journal of the Japan Society of Applied Electromagnetics and Mechanics, Vol. 26, No. 1, pp. 71-76, 2018.
  3. (3) Tatsuya Matsuzaki, Kimio Hijikata, Kazuya Miyamoto, Masatsugu Takemoto, Satoshi Ogasawara, Masao Hiragushi, "Experiments for a Prototype Machine with Proposed High Power Structure in a 5-axis Active Control Type Bearingless Canned Motor Pump", Journal of the Japan Society of Applied Electromagnetics and Mechanics, Vol. 21, No. 2, pp. 196-202, 2013.
  4. (4) K. Hijikata, M. Takemoto, S. Ogasawara, A. Chiba, and T. Fukao, "Behavior of a Novel Thrust Magnetic Bearing with a Cylindrical Rotor on High Speed Rotation", IEEE Transaction on Magnetics, Vol. 45, No. 10, pp. 4617-4620, 2009.
  5. (5) K. Hijikata, S. Kobayashi, M. Takemoto, A. Chiba, and T. Fukao, "A Proposal of an Active Thrust Magnetic Bearing with a Cylindrical Rotor Core", Journal of the Japan Society of Applied Electromagnetics and Mechanics, Vol. 17, No. 1, pp. 96-101, 2009.
  6. (6) K. Hijikata, S. Kobayashi, M. Takemoto, Y. Tanaka, A. Chiba, and T. Fukao, "Basic Characteristics of an Active Thrust Magnetic Bearing with a Cylindrical Rotor Core", IEEE Transaction on Magnetics, Vol. 44, No. 11, pp. 4167-4170, 2008.
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS) https://nrid.nii.ac.jp/ja/nrid/1000070710507/
Recruitment of research assistant(s) No
Affiliated academic society (Membership type) (1) IEEE (Member)
(2) IEEJ (Member)
(3) JSAEM (Member)
Education Field (Undergraduate level) Electric machinery, Power electronics, Electric circuit
Education Field (Graduate level) Electric machinery, Power electronics,

Affiliation