Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Ishikawajima-harima Heavy Industries Co., Ltd.

Ihi Corporation

Mitsubishi Electric Research Laboratories, Inc.

Mitsubishi Generator Co., Ltd.

Masao Akiyoshi

Akihiro Goto

Mitsutoshi Watanabe

Hiroyuki Ochiai

Yuzuru Kobayashi

Takashi Furukawa

Katsuhiro Matsuo

Norihiko Hana

Yoshihiro Shinosaka

Kazunori Tanaka

Shinichiro Minami

Mikiya Arai

Kentaro Honsho

Shigeru Saburi

Shoji Yamada

Tomoya Fukui

Kiyonori Koga

Satoshi Michihata

Eiji Nakayama

Kenji Amaya

Tatsuto Urabe

Takuji Magara

Kyoko Higashino

Dehong Liu

Masaaki Taruya

Hitoshi Kikuchi

Masayuki Tsuji

Kazuya Hasegawa

Toshio Moro

Takashi Yuzawa

Hisashi Yamada

Seiji Nakashima

Yoshiro Imazawa

Isao Otsuka

Kenichi Sakoda

Kazuhiro Tada

Yosuke Uchida

Nobuaki Uehara

Atsushi Ohashi

Naoki Iwamoto

Takuma Sasai

Akira Takamori

Keisuke Shirai

Dai Yoshii

Yoshihide Kikuichi

Daichi Goto

Shiro Iizuka

Ryogo Koba

Fumikazu Matsuura

Kazuo Souno

Tsuyoshi Yamakawa

Shogo Tsugumi

Jun Sakai

Tsunao Tezuka

Masaki Umeda

Kazuaki Ogura

Shin Uegaki

Tatsuya Kitagawa

Yusuke Tomizawa

Tadanao Sugiura

Provided are a shape model setting circuitry for setting a shape model of a target structure, a crack candidate plane in the shape model, and an observation plane of the shape model, an estimation model generator for generating an estimation model obtained from a numerical analysis of a structural analysis model by sequentially changing a boundary condition of the crack candidate plane in the structural analysis model generated from the shape model, and a crack state analyzer for estimating a position and a size of the crack by obtaining a distribution of load and displacement in the crack candidate plane at the same time by probabilistic inference through the application of an observation plane deformation vector indicating deformation of the observation plane obtained from measurement values, the estimation model, and a latent variable indicating presence or absence of the crack in the crack candidate plane.

Crack estimation device, failure diagnosis device, crack estimation method, and failure diagnosis method for rotating machine

A crack estimation device which accurately estimates a crack inside a structure is provided. The crack estimation device includes: a measurement unit which measures deformation of a measurement plane as a measurement plane deformation vector; a model generation unit which sets deformation of the measurement plane when a crack is generated in a crack generation plane, as a measurement plane estimated change vector for multiple types of crack candidates; and a crack state analysis unit which obtains a similarity between the measurement plane deformation vector and the measurement plane estimated change vector, normalizes the similarity, and estimates the crack generated in the crack generation plane from a result obtained by multiplying a vector of a state quantity indicating a state of the crack generation plane by the normalized similarity for each crack candidate, and adding together results of the multiplication for all the crack candidates.

Crack estimation device and crack estimation method

A coupling bellows includes a first bellows and a second bellows having a higher spring constant than the first bellows. A coupling member is joined to each of the first bellows and the second bellows adjacent to each other, and includes a hole inserted with a movable shaft. A pressing member moves in an axial direction of the movable shaft toward the coupling member along with movement of the movable shaft in the direction in which a movable contactor is separated from a fixed contactor, and presses the coupling member, thereby contracting the second bellows.

Vacuum circuit breaker

This device includes: an input unit for receiving a shape of an inspection target surface of a wedge exposed from a slot with no force applied to the wedge; a relation storage unit which acquires and stores, as a deformation reaction force relation, a relation between a reaction force of a spring at the inspection target surface of the wedge and deformation distribution from the shape of the inspection target surface of the wedge inputted to the input unit; a measurement unit for measuring measurement deformation distribution of the inspection target surface of the wedge; an estimation unit for estimating an estimation reaction force from the measurement deformation distribution and the deformation reaction force relation; and a judgement unit for judging proper/fault about looseness of the wedge from the estimation reaction force.

Inspection device for rotating electrical machines and method for inspecting rotating electrical machines

The semiconductor device includes: a semiconductor element including a body portion formed in a plate shape, a protection film provided at an outer periphery on one surface of the body portion, and a metal thin film provided adjacently to an inner side of the protection film on the one surface of the body portion; a metal member joined to a surface of the metal thin film on a side opposite to the body portion, by solder; and a mold resin sealing the semiconductor element and the metal member, wherein the surface of the metal thin film on the side opposite to the body portion has, on at least a part of an outer periphery thereof, a projection portion projecting from the surface of the metal thin film, and the solder is not provided on an outer peripheral side from a top of the projection portion.

Semiconductor device and manufacturing method therefor

A rotating electric machine includes a stator and a rotor. An imaging device images a test target portion which is a part of the rotor, to generate image data of the test target portion, and transmits the generated image data to an image processing device. The image processing device generates strain change information representing change in the strain distribution in the test target portion by digital image correlation on the basis of the test image data generated by the imaging device. The state of the rotor is tested using the generated strain change information.

Rotating electric machine test method, rotating electric machine test device, and rotating electric machine

Provided is an inspection device for a rotating electric machine, including: a storage unit configured to store tendency information indicating a relationship among a position of damage that occurs in an inspection target portion being a range to be inspected of a rotor included in a rotating electric machine, a scale of the damage, and an amount of deformation that occurs in a measurement target portion set on an outer surface of the rotor; a measurement unit configured to measure the amount of deformation that has occurred in the measurement target portion; and a damage estimating unit configured to estimate the position and the scale of the damage that has occurred in the measurement target portion based on the tendency information and the amount of deformation in the measurement target portion, which has been measured by the measurement unit.

Inspection device for rotating electric machine and method of inspecting rotating electric machine

In a rotor of a rotating electric machine, a slot includes a winding insertion portion and a widened portion. A width dimension of the widened portion is larger than a width dimension of the winding insertion portion. A pair of step portions are formed on both sides of an end portion of the winding insertion portion on the widened portion side. A wedge member is spaced from and opposed to the pair of step portions. An insulation includes: an insulation main body arranged between a rotor winding and a damper bar; and an extended portion, which is arranged in at least a part of a space between the wedge member and the pair of step portions, and is configured to suppress movement of the damper bar in a circumferential direction of a rotor core.

Rotor of rotating electrical machine and repairing method therefor

A measurement device is configured to set an observation surface on a surface of a structure as a measurement surface to measure a change of the measurement surface as a measurement surface change vector. An estimator is configured to generate an estimation model based on a shape model obtained by modeling a shape of the structure. The estimator is configured to acquire a coefficient vector by solving a norm minimization problem by setting, as parameters, a measurement surface change vector and a part of the estimation model. The coefficient vector forms a sparse solution. The estimator is configured to estimate a change of a crack occurrence surface by determining a candidate surface, which is inside the structure and assumed to have a crack, as the crack occurrence surface, based on the coefficient vector and another part of the estimation model.

Estimation device and estimation method

A cover covering a rectifying device includes a cover end wall portion, a cover outer wall portion, and a cover intermediate portion interposed between the cover end wall portion and the cover outer wall portion. The cover end wall portion includes an inner peripheral side intake portion, and the cover intermediate portion includes an outer peripheral side intake portion. The outer peripheral side intake portion includes an axial direction covering portion existing in a position that is closer to a rotary electric machine main body than the cover end wall portion in an axial direction, and a radial direction covering portion that connects the axial direction covering portion to an outer peripheral portion of the cover end wall portion. Intake holes are provided respectively in the inner peripheral side intake portion, the axial direction covering portion, and the radial direction covering portion.

Rotary electric machine including rectifying parts and intake parts

Radial direction outer side sizes of a first rectifying unit, a circuit board, and a second rectifying unit configuring a rectifying device are disposed so as to be sequentially smaller in a direction away from a frame of a rotating electrical machine main body, and at predetermined intervals, a cover covering the rectifying device has a cover end wall portion, a cover outer wall portion, and a cover intermediate portion, an inner peripheral side inlet portion is formed in the cover end wall portion, an outer peripheral side inlet portion is formed in the cover intermediate portion, and the outer peripheral side inlet portion is formed of an axial direction covering portion, and a radial direction covering portion that connects the axial direction covering portion and an outer peripheral portion of the cover end wall portion.

Rotating electrical machine

A circuit board has first rectifying element connecting portions and second rectifying element connecting portions, and is disposed between a first rectifying element holding portion and a second rectifying element holding portion, a plurality of first rectifying elements are each held by the first rectifying element holding portion, and are connected to the first rectifying element connecting portions by extending a first leading electrode axially, a plurality of second rectifying elements are each held by the second rectifying element holding portion, and are connected to the second rectifying element connecting portion by extending a second leading electrode axially, and a radial ventilation channel that passes through the rectifying apparatus in a radial direction is configured by disposing the circuit board so as to be spaced apart from at least one of the first rectifying element holding portion and the second rectifying element holding portion in an axial direction.

Automotive alternator

A rotor of a vehicle AC generator according to the present invention is the rotor of the vehicle AC generator which includes: magnetic pole cores; a field coil wound around the magnetic pole cores; and cooling fans fixed to the magnetic pole cores. In the rotor of the vehicle AC generator, each cooling fan includes: a base portion fixed to the axial end surfaces of the magnetic pole cores; a plurality of blade portions which are each axially arranged in a standing condition from the base portion; and a base rib which is provided in the base portion at a position apart from each root portion of the plurality of the blade portions and arranged in parallel to the extending direction of the blade portion.

Rotor of vehicle AC generator

In the present rectifying apparatus, a circuit board is disposed between a first rectifying element holding portion and a second rectifying element holding portion, and is configured such that only a housing linking portion, a stator winding connecting portion, and a voltage regulator connecting portion protrude from the first rectifying element holding portion and the second rectifying element holding portion when viewed from an axial direction, a plurality of first radially inner fins are formed on a radially inner side of the first rectifying element holding portion, and a plurality of second radially outer fins are formed on a radially outer side of the second rectifying element holding portion.

A configuration of a rectifying device configuring a vehicle-use rotating electric machine is such that when a lead drawn out from a stator winding is inserted into a through hole of a rear bracket forming a casing, a periphery of the lead is enclosed, and the through hole sealed, by a tubular member extended from a main body portion of a terminal block, and the through hole not blocked by the tubular member is sealed by a stopper portion extended in the same way from a main body portion of the terminal block. Even when the number of leads drawn out is reduced, standardization of the rear bracket is carried out by the through hole () of the rear bracket being sealed by the stopper portion.

Vehicle-use rotating electric machine

Growing community of inventors

Tokyo, Japan

Masao Akiyoshi