Search Results - "Sasa, Hiromasa"

Electromagnetic Design of a REBCO Four-Pole Full-Pitched Armature Coil Composed of Trapezoidal Windings for Fully Superconducting Synchronous Motors by Emori, Yuki, Miyazaki, Hiroshi, Miura, Shun, Sasa, Hiromasa, Iwakuma, Masataka

“…An electric propulsion system is one of the solutions to achieve low carbon dioxide emissions from aircraft. In this regard, a superconducting motor is being…”
Get full text

Current Distributions in Armature Coils Comprising Two Sizes of Racetrack Double-Pancakes with REBCO Striated Tapes by Takashima, Atsushi, Miyazaki, Hiroshi, Miura, Shun, Yoshida, Koichi, Sato, Seiki, Sasa, Hiromasa, Iwakuma, Masataka

“…We propose transposed parallel conductors that can equalize the current distribution in the coils of a superconducting motor with an armature winding imitating…”
Get full text

Effectiveness of REBCO Trapezoidal Armature Coils Used in Superconducting Induction Motors by Tsumori, Masahiko, Yamasaki, Ryoto, Okade, Yuta, Miyazaki, Hiroshi, Miura, Shun, Sasa, Hiromasa, Yoshida, Koichi, Iwakuma, Masataka

“…Armature coils that use REBa2Cu3Oy (REBCO) wires are typically racetrack shaped owing to the tape shape of the wires. It is difficult to improve the motor…”
Get full text

REBCO Trapezoidal Armature Windings for Superconducting Induction Motors by Okade, Yuta, Miyazaki, Hiroshi, Sasa, Hiromasa, Yoshida, Koichi, Miura, Shun, Sasayama, Teruyoshi, Yoshida, Takashi, Kawagoe, Akifumi, Iwakuma, Masataka

“…For extensive use in electric vehicles, electric airplanes, and other such applications, superconducting motors are designed to be lightweight and have a high…”
Get full text

Experimental Evaluation of Current Distribution in Three-Strand Transposed Parallel Conductors Composed of REBCO Superconducting Tapes by Omanyuda, Yuki, Sasa, Hiromasa, Miyazaki, Hiroshi, Miura, Shun, Iwakuma, Masataka

“…We investigated current distribution in three-strand transposed parallel conductors consisting of REBa 2 Cu 3 O y (REBCO, RE = rare earth) superconducting…”
Get full text

Evaluation of the AC Loss Characteristics of Multifilamentary REBCO Tapes by the Mechanical Scratching of MgO Areas by Oishi, Ryoma, Jingami, Kodai, Miyazaki, Hiroshi, Iwakuma, Masataka, Miura, Shun, Sasa, Hiromasa, Yoshida, Koichi, Daibo, Masanori, Fujita, Shinji

“…AC loss is a common challenge in superconducting AC applications that increases the temperature and causes quenching, and therefore, it is crucial to reduce…”
Get full text

Current Sharing Among Three-Strand Parallel Conductors Composed of REBCO Tapes in Three-Phase Armature Coil Conditions by Miura, Shun, Nakamura, Kazuki, Masuda, Yohei, Kawasaki, Goki, Miyazaki, Hiroshi, Kawagoe, Akifumi, Sasa, Hiromasa, Yoshida, Koichi, Sato, Seiki, Iwakuma, Masataka

“…Fully superconducting synchronous motors are very interesting for mobile applications such as aviation, thanks to their high output power density (kW/kg). In…”
Get full text

Electromagnetic-Thermal Coupled Analysis Considering AC Losses in REBCO Windings of 10 MW Fully Superconducting Synchronous Generators Cooled by Subcooled Liquid Nitrogen for Electric Aircraft by Sasa, Hiromasa, Miura, Shun, Miyazaki, Hiroshi, Sasayama, Teruyoshi, Yoshida, Takashi, Yamamoto, Kaoru, Iwakuma, Masataka, Hase, Yoshiji, Sasamori, Yuichiro, Honda, Hirokazu, Konno, Masayuki, Izumi, Teruo

“…A large AC loss is generated in armature windings composed of a REBa 2 Cu 3 O y (REBCO, RE = rare earth, Eu, Gd, etc.) wire in a fully superconducting…”
Get full text

Design Study of 10 MW REBCO Fully Superconducting Synchronous Generator for Electric Aircraft by Komiya, Masataka, Aikawa, Takuya, Sasa, Hiromasa, Miura, Shun, Iwakuma, Masataka, Yoshida, Takashi, Sasayama, Teruyoshi, Tomioka, Akira, Konno, Masayuki, Izumi, Teruo

“…Future aircraft are expected to have low noise pollution, low emission, and low fuel consumption. A fully turbo-electric propulsion system was proposed by NASA…”
Get full text

Basic Concept for Uniform Current Distribution in Parallel Conductors by Introducing a Small Number of Transpositions in REBCO Armature Coils by Kobun, Asato, Masuda, Yohei, Miura, Shun, Miyazaki, Hiroshi, Yoshida, Koichi, Sato, Seiki, Sasa, Hiromasa, Iwakuma, Masataka

“…We propose the concept of uniform current between groups (CUCG) in superconducting armature coils composed of two or more strands of transposed parallel…”
Get full text

Current Sharing among Transposed Three-parallel REBa2Cu3Oy Tapes in Single-phase Armature Coils by Miura, Shun, Kobun, Asato, Masuda, Yohei, Nakamura, Kazuki, Miyazaki, Hiroshi, Kawagoe, Akifumi, Sasa, Hiromasa, Yoshida, Koichi, Sato, Seiki, Iwakuma, Masataka

“…To realize a large current capacity in REBa 2 Cu 3 O y superconducting coils, we have proposed a cabling design for the transposed multi-strand parallel…”
Get full text

Current Distribution of Armature Coils Combining Two Different Sizes of REBCO Racetrack Double Pancakes by Takashima, Atsushi, Onamyuda, Yuki, Kobun, Asato, Miyazaki, Hiroshi, Kawagoe, Akifumi, Miura, Shun, Yoshida, Koichi, Sato, Seiki, Sasa, Hiromasa, Iwakuma, Masataka

“…We are currently developing superconducting electric propulsion armature coils which utilize REBa2Cu3Oy (REBCO) strands. To implement the REBCO coils in…”
Get full text

Conceptual Design and Numerical Analysis of 10 MW Fully Superconducting Synchronous Generators Installed With a Novel Casing Structure by Komiya, Masataka, Sugouchi, Ryota, Sasa, Hiromasa, Miura, Shun, Iwakuma, Masataka, Yoshida, Takashi, Sasayama, Teruyoshi, Yamamoto, Kaoru, Tomioka, Akira, Konno, Masayuki, Izumi, Teruo

“…Currently, feasibility studies on fully turboelectric propulsion systems for electric aircrafts are being conducted worldwide. A fully superconducting rotating…”
Get full text

Experimental Evaluation of 1 kW-class Prototype REBCO Fully Superconducting Synchronous Motor Cooled by Subcooled Liquid Nitrogen for E-Aircraft by Sasa, Hiromasa, Iwakuma, Masataka, Yoshida, Koichi, Sato, Seiki, Sasayama, Teruyoshi, Yoshida, Takashi, Yamamoto, Kaoru, Miura, Shun, Kawagoe, Akifumi, Izumi, Teruo, Tomioka, Akira, Konno, Masayuki, Sasamori, Yuichiro, Honda, Hirokazu, Hase, Yoshiji, Syutoh, Masao, Lee, Sergey, Hasuo, Shinya, Nakamura, Miyuki, Hasegawa, Takayo, Aoki, Yuhji, Umeno, Takahiro

“…For the development of electric propulsion aircrafts with light weight, low emission and high efficiency, MW-class fully superconducting synchronous machines…”
Get full text

Estimation Method for AC Loss of Perpendicularly Stacked REBa2Cu3O Superconducting Tapes under Magnetic Field by Sasa, Hiromasa, Miura, Shun, Iwakuma, Masataka, Izumi, Teruo, Machi, Takato, Ibi, Akira

Get full text

Thermal-Electromagnetic Coupled Analysis Considering AC Losses in REBCO Windings at 65 K of 10 MW Fully-Superconducting Synchronous Generators for Electric Aircraft by Sasa, Hiromasa, Miura, Shun, Miyazaki, Hiroshi, Sasayama, Teruyoshi, Yoshida, Takashi, Yamamoto, Kaoru, Iwakuma, Masataka, Hase, Yoshiji, Sasamori, Yuichiro, Honda, Hirokazu, Konno, Msayuki, Izumi, Teruo

Get full text

Estimation Method for AC Loss of Perpendicularly Stacked REBa2Cu3Oy Superconducting Tapes under Magnetic Field by Sasa, Hiromasa, Miura, Shun, Iwakuma, Masataka, Izumi, Teruo, Machi, Takato, Ibi, Akira

“…•The AC loss property of stacked REBCO tapes was explained quantitatively from the viewpoint of the demagnetizing coefficient.•The AC loss curve can be scaled…”
Get full text

Current Distribution Among Transposed Eight- and 16-Parallel REBa2Cu3Oy Wires in Single-Phase Armature Coils by Miura, Shun, Kobun, Asato, Masuda, Yohei, Kawasaki, Goki, Miyazaki, Hiroshi, Kawagoe, Akifumi, Sasa, Hiromasa, Yoshida, Koichi, Sato, Seiki, Iwakuma, Masataka

“…Fully superconducting synchronous motors employing superconducting armature and field coils, have a great possibility for electric propulsion systems in…”
Get full text

Current Distribution Among Transposed Eight- and 16-Parallel REBa 2 Cu 3 O y Wires in Single-Phase Armature Coils by Miura, Shun, Kobun, Asato, Masuda, Yohei, Kawasaki, Goki, Miyazaki, Hiroshi, Kawagoe, Akifumi, Sasa, Hiromasa, Yoshida, Koichi, Sato, Seiki, Iwakuma, Masataka

Get full text

Current Distribution Among Transposed Eight- and 16-Parallel REBa2Cu3O y Wires in Single-Phase Armature Coils by Miura, Shun, Asato Kobun, Masuda, Yohei, Kawasaki, Goki, Miyazaki, Hiroshi, Kawagoe, Akifumi, Hiromasa Sasa, Yoshida, Koichi, Sato, Seiki, Iwakuma, Masataka

“…Fully superconducting synchronous motors employing superconducting armature and field coils, have a great possibility for electric propulsion systems in…”
Get full text