Abstract: Provided are a magnetic gear device and a rotating electrical machine having intermediate cylindrical portions with increased rigidity against radial-direction external forces. In a magnetic gear device and a rotating electrical machine according to the present disclosure, an intermediate cylindrical portion includes: magnetic-pole portions arranged in a circumferential direction; frame-shaped spacers penetrating in the radial direction, arranged in the circumferential direction alternately with the magnetic-pole portions, and each having two side-wall portions contacting with the adjacent magnetic-pole portions; end plates provided at both ends of the magnetic-pole portions and the spacers in an axial direction of a rotary shaft; and reinforcement portions placed inside the spacers while being pressed to inner surfaces of the side-wall portions in the circumferential direction, to apply forces in the circumferential direction to the adjacent magnetic-pole portions via the spacer.

Abstract: 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.

Abstract: 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.

Abstract: The deformation calculation device includes: a deformation calculation unit which obtains a simply-calculated deformation of a measurement region by digital image correlation; a viewpoint change elimination unit which obtains a provisional deformation by subtracting, from the simply-calculated deformation, an apparent strain that is back-calculated on an assumption that there is no deformation in the measurement region; and a uniting unit which outputs, as a deformation of the measurement region from the first image-taking period to the second image-taking period, a deformation resulting from averaging the provisional deformations obtained by applying the deformation calculation unit and the viewpoint change elimination unit through sequential selection of different first images from the first image group and sequential selection of different second images from the second image group.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: This crack estimation device includes: a data determination unit which determines a shape model of a target structure to be inspected, and a crack occurrence plane and an observation plane in the shape model; an estimation data calculation unit which outputs an estimation model for estimating a state of the crack occurrence plane from a state of the observation plane, on the basis of a matrix that associates, with each other, the state of the crack occurrence plane and the state of the observation plane, obtained through numerical analysis of a structural analysis model generated from the shape model; and a crack estimation unit which estimates a state of a crack at the crack occurrence plane on the basis of the estimation model and a measurement value for the target structure actually measured at the observation plane.

Abstract: Provided is an inspection device for a rotating electric machine, the inspection device including a photographing device, a drive mechanism, a display, and a controller. The photographing device photographs a pattern formed on a surface of a wedge constituting part of an armature. The drive mechanism moves the photographing device with respect to a stator functioning as the armature. The controller detects strain of the wedge by comparing image data of the pattern photographed by the photographing device with reference data of the pattern. In this manner, the inspection device for a rotating electric machine can easily detect the strain of the wedge. Further, the controller estimates loosening of the wedge based on the strain of the wedge, and informs an operator of the rotating electric machine through the display that the loosening of the wedge has occurred.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An image processing method for measuring displacement of an object comprising is provided. The method includes acquiring first sequential images and second sequential images, wherein two adjacent images of the first sequential images include first overlap portions, wherein two adjacent images of the second sequential images include second overlap portions, wherein the first sequential images correspond to a first three dimensional (3D) surface on the object at a first state and the second sequential images correspond to a second 3D surface on the object at a second state.

Abstract: 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.

Abstract: 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.

Abstract: In a rotary electric machine, a rotor including a rotor shaft and a rotor main body provided to the rotor shaft. A baffle plate, which is fixed at a plurality of positions to an end portion of the rotor main body in the axial direction, and is configured to define an airflow passage for cooling gas. Further, the baffle plate is segmented into a plurality of baffle segments which are arrayed in a circumferential direction of the rotor. The baffle segments each include an overlapping portion which overlaps an adjacent baffle segment in an axial direction of the rotor.

Abstract: In a rotary electric machine, a rotor including a rotor shaft and a rotor main body provided to the rotor shaft. A baffle plate, which is fixed at a plurality of positions to an end portion of the rotor main body in the axial direction, and is configured to define an airflow passage for cooling gas. Further, the baffle plate is segmented into a plurality of baffle segments which are arrayed in a circumferential direction of the rotor. The baffle segments each include an overlapping portion which overlaps an adjacent baffle segment in an axial direction of the rotor.

Abstract: A power generator for which assembly work can be performed under a state in which a separable body is separated from a first frame portion and a first partition plate portion when a stator is assembled inside a frame. Therefore, an end bell to be integrated with a second partition plate portion has a small diameter, and can be arranged close to a rotor. As a result, the end bell made of an insulating resin can be arranged only in a portion in which a flux-loss reduction effect is significant.

Abstract: A power generator for which assembly work can be performed under a state in which a separable body is separated from a first frame portion and a first partition plate portion when a stator is assembled inside a frame. Therefore, an end bell to be integrated with a second partition plate portion has a small diameter, and can be arranged close to a rotor. As a result, the end bell made of an insulating resin can be arranged only in a portion in which a flux-loss reduction effect is significant.