Search Results - "Electrical engineering in Japan"

Traction Drive Motor for Small EVs Using Mass Producible Amorphous Laminated Cores by Kano, Yoshiaki, Kanekiyo, Hirokazu, Suzuki, Yohei

“…ABSTRACT This study presents the development of a small electric vehicle (EV) traction drive motor using Fe‐based amorphous laminated cores that can be mass…”
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An Experimental Study on Behavior of Power Conditioning System for Photovoltaic Power Generation System Connected to End of Distribution Line by Yamanaka, Hiroki, Yamaguchi, Mayu, Matsuura, Ippei, Shimizu, Hirotaka

“…ABSTRACT Reverse power flow from a photovoltaic (PV) power generation system to distribution system is limited below a certain limit value. The behavior of a…”
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AC breakdown characteristics of ultra violet curable epoxy resin with nitrogen fine bubbles by Araoka, Nobutaka, Takamura, Norimitsu, Inoue, Tsubasa, Hanai, Masahiro

“…We investigated AC breakdown characteristics of ultra violet curable epoxy resin (UV‐EP) with nitrogen fine bubbles (FBs) in order to improve insulating…”
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Evaluation of a vacuum insulated temperature calibration device to calibrate thermistor characteristics for skin cancer diagnosis by Fujita, Homei, Nonaka, Takashi, Hosokawa, Yasushi, Kogawa, Takuma, Guo, Fuhui, Iseki, Yuya, Yokota, Miyo, Okabe, Takahiro, Maruyama, Shigenao

“…Recent methods using thermistors as an early detection of skin cancer require the higher resolution of 5 mK. Previously, the authors developed a vacuum…”
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Development of fatigue prediction system for bogie frame using a dynamic analysis model based on high‐speed and high‐precision stress estimation method by Yamazaki, Yosuke, Fujimoto, Takahiro, Shimokawa, Yoshiyuki, Minami, Hideki, Kondo, Osamu, Iokibe, Gaku, Nakagawa, Junichi

“…Despite ensuring the integrity of bogie frames for railway vehicles via nondestructive inspections during periodic maintenance, the possibility of fatigue…”
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Design and improvement of torque characteristics of half‐wave rectified variable field flux motor with axial gap structure by Yazama, Kentaro, Abe, Takashi, Otomo, Yoshitsugu, Koga, Takahiro, Shimohara, Yuzen

“…The axial gap structure of a half‐wave rectified variable field flux motor (AG‐HVFM) has been proposed, which has a double stator structure and field winding…”
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Centralized control of large‐scale wind farm for system frequency stabilization of the power system by Konno, Yuta, Takahashi, Rion, Alsharif, Faramarz, Umemura, Atsushi

“…In recent years, wind power generation has been promoted as a countermeasure to global environmental problems. However, the introduction of many wind power…”
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Development of low‐torque‐ripple motor with high rotational speed to downsize electrical systems by Hori, Masahiro, Sawahata, Masanori, Hara, Takafumi, Nagata, Minori

“…Electrification is progressing across different fields such as automobiles and construction machinery. Motors for electric systems are required to be compact…”
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Development of a maintenance scheduling method for power generators considering large penetration of variable renewable energy sources and system inertia by Segawa, Shuhei, Ogimoto, Kazuhiko, Azuma, Hitoshi, Isonaga, Akira, Fukutome, Suguru

“…Conventional methods to schedule power generators maintenance aim to secure enough supply reserve margin to the power system when its power generators have to…”
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Demonstration of application of redox flow battery for securing demand‐supply reserve power and improvement of grid resiliency by Omine, Eitaro, Murakami, Shinichi, Kusunose, Nobuhiko, Kitano, Riichi, Ooka, Toshio, Shibata, Toshikazu

“…In order to achieve net‐zero carbon emissions by introducing enormous amount of renewable energy, it is essential to secure the reserve power to improve the…”
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A reference stator flux linkage calculation method for realizing maximum efficiency operation in direct‐torque‐controlled IPMSM drives by Shinohara, Atsushi, Maemura, Takato, Yamamoto, Kichiro

“…In this paper, a reference stator flux linkage calculation method is proposed for realizing maximum efficiency operation in direct‐torque‐controlled interior…”
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Proposal of angle detection method for concentrated winding bearingless motors with less magnetic interference due to current by Miyoshi, Masahito, Nakamura, Yuichiro, Furutani, Shinichi, Kajino, Keita, Sugimoto, Hiroya

“…This paper proposes a method for detecting the angle of a bearingless motor with less magnetic interference due to the current. Bearingless motors have…”
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Experimental verification of isolation power circuit for transformer‐less AC fed electric vehicles by Fukuda, Tenko, Funaki, Tsuyoshi

“…This study aimed to develop a power supply system without a traction transformer for weight reduction and downsizing. Transformer‐less power supply is expected…”
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Demonstration of participation in the German balancing power market using a large‐capacity hybrid battery storage system by Hirose, Keiichi, Tanaka, Hirohide, Dewaki, Masayuki, Hayashi, Kazutaka, Mikami, Yousuke, Hayashi, Yoshiki, Arita, Hiroshi, Hamamura, Saori, Hirai, Naoki

“…As one of NEDO's international demonstration projects, a large‐capacity hybrid battery storage system which consists of two types of battery cells with…”
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Analysis of high‐frequency electromagnetic ringing phenomenon under GaN‐FET inverter excitation by Ogishima, Norihiro, Thao, Nguyen Gia Minh, Fujisaki, Keisuke

“…In this study, the ringing phenomenon of gallium nitride‐field effect transistor (GaN‐FET) and silicon‐insulated gate bipolar transistor (Si‐IGBT) inverter…”
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Experimental verification of voltage boost control in a hybrid system using D‐EPC by Matsuno, Hiroki, Akiyama, Hiromu, Yoshimoto, Kantaro, Yokoyama, Tomoki

“…A novel voltage boost system using DC‐inputs direct electric‐power converter (D‐EPC) is proposed. D‐EPC is an inverter that can control the distribution of…”
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Analysis of interference of electromagnetic noise in an electric compressor for vehicle air‐conditioning systems with an integrated mechanical and electrical structure by Uda, Iori, Ogasawara, Satoshi, Orikawa, Koji, Kobayashi, Koji, Yoshida, Hiroshi, Kashihara, Tatsuki, Takada, Kohei

“…Since a motor drive system contains an inverter (high‐voltage circuit) and gate drive circuits (low‐voltage circit) with a switching regulator, electromagnetic…”
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Development of event‐based centralized excitation control method of synchronous generators for improving the transient stability by Yamaoka, Fumichika, Kawabe, Kenichi

“…Maintenance of transient stability is important for the stable operation of power systems. However, as a large amount of renewable energy sources are concerned…”
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Atmospheric pressure argon plasma jets I – Measurements of spatial distribution for visible emission spectrum and vacuum ultraviolet by Suzuki, Susumu, Teranishi, Kenji, Itoh, Haruo

“…This paper describes the observed position dependent emission spectrum and vacuum ultraviolet (VUV) to clarify the optical structure of argon atmospheric…”
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Fault current limiter principle by switching magnetic circuit by Tsukima, Mitsuru, Hatauchi, Yamato

“…Several types of fault current limiters have been studied so far, including superconductor based one or nonsuperconductor based one. However, it is difficult…”
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