Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Yoshihiro Taniyama

Yasuo Kabata

Masafumi Fujita

Mikio Kakiuchi

Norio Takahashi

Katsuya Yamashita

Tadashi Tokumasu

Masanori Arata

Koji Matsuyama

Koji Ando

Atsushi Yamamoto

Tatsuro Uchida

Masahiko Takahashi

Toshio Hirano

Takashi Harakawa

Hidekazu Shiomi

Yutaka Hashiba

Takashi Ueda

Kazuya Yasui

Tetsushi Okamoto

Ken Nagakura

Hiroaki Ishizuka

Fumio Sawa

Yukihiko Kazao

Shozo Abe

Toshio Kitajima

Yo Sasaki

Takaharu Tani

Makoto Mikami

Masayuki Ichimonji

Hidehito Matsuzaki

Kenmei Shimanuki

Ikuo Saito

Takaaki Hirose

Shinji Kubo

Ryo Fuchimoto

Takeshi Hayashi

Junichi Uematsu

Takeo Urita

Miki Nakamura

Yoshinori Torii

According to one embodiment, a rotor includes a coil slot, a sub-slot, and coil airflow paths arranged in the rotor axial direction. At least one coil airflow path among the coil airflow paths includes a first wall surface disposed on a core central portion side of a cooling gas inlet portion of the coil airflow path, a second wall surface disposed on the core central portion side of an inside of the coil airflow path, and located more on the rotor radially outward side and more on a core end portion side than the first wall surface, and a third wall surface configured to connect the first wall surface and the second wall surface, the third wall surface including a surface perpendicular to a rotor radial direction.

Rotor with coil airflow paths

According to the embodiment, a field winding interlayer short-circuit detection apparatus comprises: a field winding resistance calculator to calculate, for a field winding of a rotating electrical machine, a field winding resistance calculated value from a detected value of a field winding current and a detected value of a field winding voltage; a determiner to determine presence or absence of an interlayer short-circuit in the field winding by using a comparison result between the field winding resistance calculated value and the reference resistance value.

Field winding interlayer short-circuit detection apparatus and field winding interlayer short-circuit detection method

In one embodiment, a failure diagnosis apparatus includes a simulation module configured to simulate a target device to output virtual measured data obtained when the target device is in at least any one of one or more failure modes. The apparatus further includes a measured data obtaining module configured to obtain measured data that is measured from the target device. The apparatus further includes a failure mode identifying module configured to identify a failure mode of the target device based on the virtual measured data and the measured data.

Failure diagnosis apparatus, monitoring apparatus, failure diagnosis method and recording medium

According to one embodiment, there is provided a rotating electrical machine coil with a conductor and an insulation layer that is provided around the conductor to cover the conductor, the rotating electrical machine coil including a linear part of the coil and a coil end that is separable from and electrically connectable to the linear part of the coil.

Rotating electrical machine coil

According to one embodiment, there is provided a high pressure bushing arranged through by penetrating a stator frame of a rotating electrical machine in which a cooling gas is sealed. At least a communicating hole is provided in the hollow connecting conductor and at least a reflux hole is provided in the gas circulation pipe, such that the cooling gas flows in both of the first gap and the second gap, passes through an inner side of the gas circulation pipe, and is discharged to the machine inner side.

High pressure bushing of rotating electrical machine and rotating electrical machine

According to one embodiment, there is provided a power-fluctuation reducing apparatus in a power generation system to control a converter connected to the power generation system and connected to secondary batteries. The power-fluctuation reducing apparatus includes adjusting direct current voltages output from the secondary batteries, respectively, detecting the directing current voltages output from the secondary batteries, respectively, controlling to adjust the direct current voltages output from the secondary batteries to make the direct current voltages uniform, based on the detected direct current voltages, and controlling the converter to reduce power fluctuations in the power generation system.

Power-fluctuation reducing apparatus for power generation system

According to one embodiment, a solar heat collecting apparatus comprises a first heat exchanging unit and a second heat exchanging unit. The first heat exchanging unit includes a first pipe through which a heat medium flows and a first heat receiving face which receives heat of sunlight reflected by a plurality of reflecting units. The first heat exchanging unit heats the heat medium flowing through the first pipe by using heat of the first heat receiving face. A second heat exchanging unit includes a second pipe through which the heat medium heated by the first heat exchanging unit flows, a second heat receiving face which receives heat of the sunlight reflected by a plurality of reflecting units, and a nozzle provided to the second pipe to discharge the heat medium flowing through the second pipe toward a back face of the second heat receiving face.

Solar heat collecting apparatus and solar power generation system

According to one embodiment, in a high-voltage bushing of a rotating electric machine, the communicating holes are inclined at least toward a circumferential direction of the hollow conductor or toward a machine external side from a direction vertical to a wall surface of the hollow conductor.

High-voltage bushing of a rotating electric machine

A rotating electric machine is provided, where a generator has an increased capacity and a reduced size achieved by electromagnetically effectively utilizing that parts of a rotor core which are outside the narrowest parts of magnetic poles of the rotor core to permit large field current and suppress an increase in temperature of rotor coils. The rotating electric machine includes a stator constructed by winding armature coils around a stator core (), and a hollow circular cylindrical rotor. The rotor has at least one pair of magnetic poles (), non-polar portions () between the magnetic poles, and interpolar portions () arranged in the non-polar portions. In the non-polar portions (), a plurality of rotor slots () are arranged at predetermined intervals. Field windings are wound in each rotor slot (). The cross-sectional areas (S) of the rotor slots () other than the rotor slots () nearest to the magnetic poles () are gradually increased in the direction from the magnetic poles () to the interpolar portions ().

Rotating electric machine

It is an object of this invention to provide a dynamo-electric machine rotor which effectively and uniformly cools a rotor coil outside a rotor core by forming a ventilating groove in the rotor coil, tolerates large field current, and has high reliability. There is provided a dynamo-electric machine rotor in which spaced core slots are formed in a cylindrical rotor core, rotor coilsof stacked turns are fitted into the core slots to form multiple nested rings around a magnetic pole of the rotor, ends of the rotor coils are fixed by an retaining ring, and a spaceris arranged in each of circumferential gaps between the ends of the rotor coils, wherein each spacerhas a length not more than the lengths of linear portionsat the ends of corresponding ones of the rotor coils, a cut-outfor ventilation of coolant gas is formed across at least one of two sides of the spacer, and the spacer is in contact with the rotor coils at the two sides of the spacer at a position located furthest inside in the radial direction of the rotor and an arbitrary position.

Dynamo-electric machine rotor

A rotary electric machine includes: a stator, a rotor and rotor fans contained in a closed type frame. The cooling gas is circulated in the frame by the rotor fans and warmed as a result of heat exchange with the stator and the rotor is cooled by a gas cooler. A heat pump is adapted to use cooling water or ambient air as high temperature heat source and liquid coolant as low temperature heat source. A liquid coolant circulation system for supplying liquid coolant to the heat exchange section of the gas cooler is provided. The liquid coolant is cooled by the heat pump and is supplied to the heat exchange section of the gas cooler by means of the coolant circulation system.

Rotary electric machine

Hydrogen gas is circulated to cool an electric rotating machine main body, and brush seals are provided to contact a predetermined position on the outer circumferential surface of a rotating shaft. As a result, contact of a sealing oil and the hydrogen gas, contact of a lubricating oil and the sealing oil in the bearing, and leakage of the hydrogen gas outside the machine are prevented.

Electric rotating machine with bearing seals

Growing community of inventors

Tokyo, Japan

Yoshihiro Taniyama