Kabushiki Kaisha Toshiba

Tooru Ootaka

Tetsushi Okamoto

Shigeru Harada

Yukio Suzuki

Susumu Nagano

Akihiko Suzuki

Hideyuki Nakamura

Mikio Kakiuchi

Fumio Sato

Hiroshi Hatano

Yoshiyuki Inoue

Noriyuki Iwata

Satoru Asai

Takashi Harakawa

Akio Sumita

Ken Nagakura

Fumio Sawa

Masashi Kobayashi

Makoto Takanezawa

Makoto Kawahara

Hiroyoshi Tsuchiya

Mitsuhiko Koyama

Shigehito Ishii

Masamitsu Sakuma

Wataru Nakamura

Ryosuke Ohirabaru

Toshihiko Shinoda

Kazuya Segawa

According to an embodiment, there is provided an apparatus which quantitatively evaluates a braze bonding length. A radiation emission unit emits radiation to each of a plurality of partial specimens which are obtained by cutting a specimen in a plane perpendicular to a braze bonding length direction. A light generator generates light of an amount corresponding to an intensity of transmissive radiation. An imaging unit photographs this light. A calculator calculates a braze bonding length of each of the partial specimens, from a light amount obtained with respect to each of the partial specimens, based on a correlation between a braze bonding length and a light amount. The calculator further calculates the braze bonding length of the specimen by totaling the braze bonding lengths of the respective partial specimens.

Apparatus and method for quantitative evaluation of braze bonding length with use of radiation

According to one embodiment, there is provided a rotating electrical machine including a core, a coil extending from the core, and an electromagnetic shield which is provided outside the core, and has a plurality of shoulders projecting toward the coil. The coil includes an insulator covering outside of a conductor, a resistance layer formed on a surface of the insulator and contacting the core, and at least one potential grading layer formed on a surface of the insulator adjacent to the resistance layer. A boundary between the resistance layer and potential grading layer is provided at a position farther from the core than a point on a surface of the coil, where a distance between the coil and a shoulder of the electromagnetic shield closest to the core is the shortest.

Rotating electrical machine and coil

The present invention provides a solution to the above-described drawbacks, and more specifically, as the tape-like or sheet-like insulation member, the resin matrix in which the first particles having a heat conductivity of 1 W/mK or higher and 300 W/mK or lower, that are diffused in the resin matrix, and the second particles having a heat conductivity of 0.5 W/mK or higher and 300 W/mK or lower, are diffused, is employed.

Highly heat conductive insulating member, method of manufacturing the same and electromagnetic device

Growing community of inventors

Kawasaki, Japan

Tooru Ootaka