Abstract: A rotor may be provided with a rotor core that is fixed to a shaft and includes a plurality of through holes along an axial direction of the shaft. The rotor may be provided with a permanent magnet disposed in each of the plurality of through holes. The rotor may be provided with a functional fluid having a magneto rheological effect of fixing the permanent magnet in each of the plurality of through holes.

Abstract: (Solution) A determination apparatus configured to determine deterioration of a fluid to be used in circulation includes: a power index acquisition section configured to acquire information indicating a value of a power index, which is an index that represents a state of a pump for circulating the fluid and that is correlated with magnitude of power consumption of the pump; and a determination section configured to, based on the value of the power index acquired by the power index acquisition section, determine (i) whether the fluid has deteriorated, (ii) a degree of the deterioration of the fluid, and/or (iii) necessity of replacement of the fluid. The power index acquisition section may acquire the information indicating the value of the power index in each of one or more periods.

Abstract: A magnet material producing method includes demagnetizing, by thermal demagnetization in an irreversible manner, a molded permanent magnet, by heating the permanent magnet in a presence of a reducing substance having a reducing property stronger than nitrogen molecules, and cooling the demagnetized permanent magnet to create a molded magnet material. A magnet material with a thickness of 30 µm or more contains, as main components, a rare earth element and a transition metal element. In the above described magnet material, a ratio of (b) a carbon concentration in a surface layer region that is a region within 10 µm from a surface of the magnet material to (a) a carbon concentration in an interior region that is a region arranged in a position away from the surface of the magnet material by more than 10 µm and having a thickness of 10 µm is 1.1 or more.

Abstract: A diagnosis apparatus that is mounted on equipment and diagnoses a state of the equipment includes a timing decision section configured to decide timing at which the diagnosis apparatus diagnoses the state of the equipment. The timing decision section is configured to decide the timing such that a length of a time interval for a diagnosis during a first time period is equal to or less than a first reference value, and a length of a time interval for a diagnosis during a second time period is greater than the first reference value. The first time period and the second time period do not temporally overlap.

Abstract: A reuse determination system of a power unit for propelling a vehicle includes an acquisition section configured to acquire operation history data including torque data and number of rotations data of the rotating electrical machine, an estimation section configured to estimate a load of each of a plurality of components constituting the power unit, based on at least one of the torque data or the number of rotations data, and a determination section configured to compare, for each of the plurality of components constituting the power unit, each load estimated by the estimation section with a threshold set for each of the plurality of components and determine that the power unit is to be reused, when the load of each of the plurality of components estimated by the estimation section is equal to or less than the threshold set for each of the plurality of components.

Abstract: A rotor structure of an electric motor includes a rotor and a stator. The rotor is fixed to a motor shaft and rotates integrally with the motor shaft. The stator is fixed around the rotor. The rotor includes a cylindrical rotor core coaxially press-fitted and fixed to the motor shaft, a pair of ring-shaped end surface plates disposed facing two axial end surfaces of the rotor core, and permanent magnets respectively housed in slots penetrating an outer peripheral portion of the rotor core in an axial direction. A plurality of openings in which the permanent magnets are exposed are formed in a circumferential direction in an outer peripheral portion of one of the end surface plates, and a ring-shaped cover that covers the openings is detachably attached to an outer end surface of the outer peripheral portion of the end surface plate.

Abstract: A part management apparatus may include an acquisition unit configured to acquire part information indicating a part having a symptom of a failure among a plurality of parts configuring a drive mechanism mounted to a vehicle. The part management apparatus may include an identification unit configured to refer to a storage unit that is configured to store a material configuring each of the plurality of parts to identify a material of the part indicated by the part information. The part management apparatus may include a notification unit configured to notify a material management apparatus configured to manage an inventory of a material of a part, of information related to the material of the part.

Abstract: A vehicle management apparatus may include a collection unit configured to collect data indicating a state of a vehicle based on a detection result of a sensor configured to detect the state of the vehicle from a plurality of vehicles. The vehicle management apparatus may include a classification unit configured to classify the plurality of vehicles into a plurality of group according to a predetermined algorithm based on the data of each of the plurality of vehicles. The vehicle management apparatus may include an identification unit configured to identify, when a faulty vehicle in which a failure has occurred is present among the plurality of vehicles, another vehicle belonging to a group to which the faulty vehicle belongs from among a plurality of groups as a failure symptom vehicle having a symptom of occurrence of a failure.

Abstract: A rotor may be provided with a rotor core that is fixed to a shaft and includes a plurality of through holes along an axial direction of the shaft. The rotor may be provided with a permanent magnet disposed in each of the plurality of through holes. The rotor may be provided with a functional fluid having a magneto rheological effect of fixing the permanent magnet in each of the plurality of through holes.

Abstract: A rotor structure of an electric motor includes a rotor and a stator. The rotor is fixed to a motor shaft and rotates integrally with the motor shaft. The stator is fixed around the rotor. The rotor includes a cylindrical rotor core coaxially press-fitted and fixed to the motor shaft, a pair of ring-shaped end surface plates disposed facing two axial end surfaces of the rotor core, and permanent magnets respectively housed in slots penetrating an outer peripheral portion of the rotor core in an axial direction. A plurality of openings in which the permanent magnets are exposed are formed in a circumferential direction in an outer peripheral portion of one of the end surface plates, and a ring-shaped cover that covers the openings is detachably attached to an outer end surface of the outer peripheral portion of the end surface plate.

Abstract: In a hybrid drive apparatus, a first planetary gear mechanism transmits rotation of a first main shaft to which the engine driving force is inputted to a main speed-changing part at an equal speed due to engagement of a first clutch, and transmits the rotation of the first main shaft to the main speed-changing part and a first motor/generator at an increased speed due to engagement of a second clutch. This enables the range of gear ratios of the transmission to be extended and the degree of freedom in setting a gear ratio or a step ratio to be increased, and enhances the power generation efficiency by rotating the first motor/generator at a high speed without using a special speed increase device.

Abstract: A hybrid drive apparatus is provided in which a first planetary gear mechanism transmits rotation of a first main shaft to which the driving force of an engine is inputted to a main speed-changing part at an equal speed due to engagement of a first clutch, and transmits the rotation of the first main shaft to the main speed-changing part and a first motor/generator at an increased speed due to engagement of a second clutch. This enables the range of gear ratios of the transmission to be extended and the degree of freedom in setting a gear ratio or a step ratio to be increased, and moreover, it is possible to enhance the power generation efficiency by rotating the first motor/generator at a high speed without using a special speed increase device.