Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Yutaka Higashimura is active.

Publication


Featured researches published by Yutaka Higashimura.


IEEE Transactions on Electrical Insulation | 1987

An Analysis of Multi-Factor Aging of Mica-Epoxy Insulation Systems by the Infinite Sequential Stress Method

Yasuhiko Kako; Kenzo Kadotani; Yutaka Higashimura

In most cases the infinite sequential stressing method can be applied in the analysis of multi-factor aging of insulation systems. Although the simultaneous multi-factor aging characteristics cannot be reproduced strictly by sequential stress tests, the characteristic equation for multi-factor aging can be derived by combining all single-factor aging characteristics in sequential stress aging. Generally, such characteristic equations can be represented only in numerical form, but in the case of mica-epoxy insulation systems in which the value of n in the inverse n-th power law remains unchanged during thermal aging, and also the value of thermal aging rate remains unchanged during voltage aging, the characteristic equations for multi-factor aging can be derived in an analytical form. The mechanical aging characteristics determined by repeated bending tests seem to be of two types, uniform degradation, similar to thermal aging, and local degradation, similar to voltage aging. The ratio of these two types depends on the mica (mica-paper or mica-splitting). Characteristic equations for simultaneous thermal, voltage, and mechanical aging also can be derived by the infinite sequential stressing method. This method assumes an infinite repetition of the four kinds of aging: thermal, voltage, uniform mechanical, and local mechanical.


international symposium on electrical insulating materials | 2008

Insulation technology of newly developed generators

Kinya Kobayashi; Ryozo Takeuchi; Yutaka Higashimura

Insulation technology is important for supporting the reliability of basic generators, so continuous development of the technology is needed, and various new products may be developed based on this technology.


Archive | 1983

Stator of submerged motor

Keiji Fukushi; Yutaka Higashimura; Shinei Huzioka; Syuzou Iwaasa; Kenzo Kadotani


Archive | 1995

Semiconductor device having power semiconductor elements

Kazuji Yamada; Akira Tanaka; Ryuichi Saito; Yasutoshi Kurihara; Tadao Kushima; Takashi Haramaki; Yoshihiko Koike; Takashi Hosokawa; Mamoru Sawahata; Masahiro Koizumi; Jin Onuki; Kazuhiro Suzuki; Isao Kobayashi; Hideo Shimizu; Yutaka Higashimura; Shigeki Sekine; Nobuya Koike; Hideya Kokubun


Archive | 2007

ROTATING ELECTRICAL MACHINE WINDING, ROTATING ELECTRICAL MACHINE, AND SEMICONDUCTIVE INSULATING COMPONENT USED THEREIN

Yutaka Higashimura; Yoshimi Kurahara; Hiroshi Miyao; Keiji Suzuki; Mitsuru Onoda; Nobuaki Tanaka


Electrical Engineering in Japan | 1992

A new test method for internal partial discharge resistance of insulating materials

Yasuhiko Kako; Shigetaka Watanabe; Yutaka Higashimura


Archive | 1983

Stator of submerged pump

Keiji Fukushi; Yutaka Higashimura; Shinei Huzioka; Syuzou Iwaasa; Kenzo Kadotani


Archive | 1995

Semiconductor device comprising a plurality of semiconductor elements

Kazuji Yamada; Akira Tanaka; Ryuichi Saito; Yasutoshi Kurihara; Tadao Kushima; Takashi Haramaki; Yoshihiko Koike; Takashi Hosokawa; Mamoru Sawahata; Masahiro Koizumi; Jin Onuki; Kazuhiro Suzuki; Isao Kobayashi; Hideo Shimizu; Yutaka Higashimura; Shigeki Sekine; Nobuya Koike; Hideya Kokubun


Archive | 1998

High temperature conductive coil and insulating sheet and manufacture thereof

Yutaka Higashimura; Koji Ohata; Ryozo Takeuchi; 功治 尾畑; 東村 豊; 良三 武内


Archive | 1995

Sheet material for electrical insulation, prepreg and electrically insulated coil using the same

Hiroshi Miyao; Yutaka Higashimura; Makoto Takamura; Takanori Satoo; Hiroyuki Kamiya; Mitsuru Onoda

Collaboration


Dive into the Yutaka Higashimura's collaboration.

Researchain Logo
Decentralizing Knowledge