Abstract: A motor rotor structure for an electric turbo charger is manufactured at low cost with good quality by fixedly fitting, over a shaft, a rotor core having electromagnetic steel sheets pre-formed as an integrated stack. The rotor structure includes a rotor core which is rotated by a magnetic field formed by a stator in a housing; a shaft configured to rotate a compressor impeller and the rotor core together; and a bearing supporting the shaft. The rotor includes the rotor core including the electromagnetic steel sheets; a stopper portion formed at an intermediate portion of the shaft to restrict axial movement of the rotor core; and a pressing unit which presses the rotor core fitted over the shaft against the stopper portion. The pressing unit prevents a circumferential phase shift between the shaft and the rotor core by a pressing force thereof.

Abstract: In a wind turbine generator, the rotation of the rotor is speeded up by a hydraulic pump and a hydraulic motor and is transferred to a synchronous generator. In a state in which the wind turbine generator is interconnected to a utility grid, and the synchronous generator reaches a synchronous speed, if no mechanical power is transferred to the synchronous generator, a wind-turbine control system operates the synchronous generator as a synchronous condenser, thus controlling the magnitude of the field current of the synchronous generator. Thus, the wind turbine generator can supply reactive power to the utility grid without adding new equipment, such as a reactive power compensator using a semiconductor switch.

Abstract: In a wind turbine generator, the rotation of the rotor is speeded up by a hydraulic pump and a hydraulic motor and is transferred to a synchronous generator. In a state in which the wind turbine generator is interconnected to a utility grid, and the synchronous generator reaches a synchronous speed, if no mechanical power is transferred to the synchronous generator, a wind-turbine control system operates the synchronous generator as a synchronous condenser, thus controlling the magnitude of the field current of the synchronous generator. Thus, the wind turbine generator can supply reactive power to the utility grid without adding new equipment, such as a reactive power compensator using a semiconductor switch.

Abstract: A rotation shaft supporting structure for an electric supercharger is provided with: a rotation shaft to which a compressor wheel is attached, the compressor wheel being a wheel of a supercharging side; an electric motor including a motor rotator securely installed to the rotation shaft, and a stator for applying torque to the motor rotator; a bearing provided on a bearing side closer to the compressor wheel than the motor rotator so as to support the rotation shaft; and a damper unit for absorbing shaft vibration of the rotation shaft, the damper unit being provided at a shaft end on an opposite side to the bearing side.

Abstract: In a power generation facility, there are provided a plurality of diesel engines, a plurality of turbochargers driven by exhaust gas of these diesel engines, a plurality of power generators connected to the plurality of turbochargers, a plurality of converters for converting AC power generated by the plurality of power generators to DC power, one inverter for converting the DC power outputted from the plurality of converters to AC power, and a main controller for controlling the converters in accordance with the AC power from the inverter, by which stable electric power can be generated.

Abstract: A turbo charger generator (1) generates power with a generator (7) by driving a gas turbine (3) and a compressor (6) with exhaust gas from an internal combustion engine (2). The generated AC power is supplied to an electric power system (12) via a power conversion unit (8). The power conversion unit (8) has a converter (13) for converting AC power into DC power, a unit (18) for estimating a rotor rotation angle ? based on a rotor magnetic flux, and a control unit (15) for coordinate-converting AC current into DC current by using the rotor rotation angle ? as the reference, and controlling the output DC power of the converter (13) such that the magnitude of the DC current is maintained at a target DC current value.

Abstract: Rotational speed of an electric turbocharger controlled so that the actual temperature of the motor does exceed the allowable level even over a long time span. A speed control device for the turbocharger, includes a temperature sensor, a speed limitation device which limits the speed of the motor in response to the temperature level detected by the temperature sensor wherein the speed limitation device is provided with a limit control start temperature correction device which decreases the limit control start temperature when the increase rate of the detected temperature exceeds a threshold. A speed limitation setting device sets a speed limit based on the temperature difference between the limit control start temperature and the detected temperature T on a rate of increase of the detected temperature.

Abstract: A wind-turbine control device controls a wind turbine generator in which a rotor having a plurality of blades receives wind and rotates. The generator generates electrical power through the rotation of the rotor. The electrical power is supplied to a utility grid, and electric energy to be supplied to the utility grid can be changed according to a change in the frequency of the utility grid. The wind-turbine control device includes a subtracter to calculate a frequency change, which is the difference between a measurement value of the frequency of generated output power of the wind turbine generator and a set value of the frequency of the generated output power of the wind turbine generator. The wind-turbine control device further includes a limiter to limit a change in the electrical power corresponding to the frequency change calculated by the subtracter, based on the rotational speed of the generator.

Abstract: Inside of a gas-tight housing, an electric motor, an inverter and a compressor are housed. Further, an intake air pipe is connected to the gas-tight housing. Inside of the gas-tight housing, an intake air flow passage is formed. Further, a connection opening of an outside air induction pipe provided with a flow rate regulating valve is arranged so as to face a suction opening of a compressor. When the delivery air flow rate as well as the delivery air pressure of the compressor is reduced due to the pressure loss and the like of the intake air ‘a’ which passes through the air flow passage and cools the electric motor and the inverter, an outside air ‘o’ of low temperature is induced so that: the capacity shortage as well as the performance deterioration of the compressor is constrained; and the over-heating of the compressor is constrained.

Abstract: Two-ply films 23, 24 are sent and heat-fused in a longitudinal direction and a transverse direction on a heat drum-roller 30, furthermore, hollow bubble portions 63 with an air-leading groove 32 and bubble-forming depressions 33, provided on a circumferential surface of the heat drum-roller, and a communicating portion 62 going through sealed portions in the direction transverse to the longitudinal direction to make communication between the bubbles, are formed on the film, in order that each bubble is expanded by feeding into the hollow bubble portion 63 with air, sent from an air-blowing nozzle 40 through the communication portion 62, and then, the communicating portion 62 communicating the expanded bubbles is sealed with a point-seal 50. Therefore, an air cushion sheet 60 having plural independent bubbles 65 which are each formed in a large long type in the transverse direction is easily and certainly produced.

Abstract: A method for producing a color filter involves (A) forming a photosensitive coating film on a transparent electrically conductive layer of a transparent substrate having the transparent electrically conductive layer on its surface, and exposing the photosensitive coating film to light in a first irradiation amount through a mask having a predetermined pattern of a certain light transmittance and at least once displacing the mask to another position on the photosensitive coating film and exposing the photosensitive coating film to light in a second irradiation amount different from the first irradiation amount through the mask; and (B) developing and removing a photosensitive coating film portion exposed to light in one of the smallest and largest irradiation amounts for exposing the transparent electrically conductive layer and electrodepositing a colored coating on the exposed electrically conductive layer for forming a colored layer thereon, operation of developing and removing the photosensitive coating fi

Abstract: A crusher-is disposed at a distal end of an operating boom of a construction vehicle. The crusher permits the breaking of a crushed mass of natural stone by means of a breaking force occurring between a stationary jaw body and a movable jaw body as the movable jaw body is closed toward the stationary jaw body. A flat auxiliary member is replaceably disposed on the stationary jaw body opposing the movable jaw body so as to break the crushed mass into smaller pieces. The distal end of the stationary jaw body projects longer than the distal end of the movable jaw body to facilitate the raking out of the crushed masses obtained in a blasting operation.

Abstract: A system for inspecting a forward end portion in a tunneling machine including cutter bits and a chamber such as a tunnel boring machine or a shield tunneling machine. The system includes an apparatus for inspecting a forward end portion comprising at least one through hole provided on the partition wall for defining a chamber, an elongate member slidably and rotatably inserted into the through hole, an image sensor positioned at a forward end of the elongate member for observing a cutter bit or the inside of the chamber, an image display provided in the main body for displaying an image from the image sensor, and a connection for connecting the image sensor and the image display. The system also includes a method for inspecting a forward end portion comprising the steps of defining a cavity in the chamber or in the vicinity of the cutter bits by supplying compressed air, inserting an image sensor into the cavity, and observing the inside of the chamber or the cutter bits using the image sensor.

Abstract: A quartz crystal oscillator device including a quartz crystal resonator supported on a base via a support member and hermetically sealed by a cap wherein the support member comprising a pair of upper and lower disc-shaped connection sections, a through section which is provided between the two connection sections, and bent legs. This quartz crystal oscillator device has high resistance against impact and thermal shock and its resonance frequency is not affected by sealing stress. Furthermore, it can be assembled efficiently and made small.

Abstract: This invention comprises a device for automatically dropping mold goods in an injection molding machine instantaneously when the mold is opened.

Abstract: In a plug mill, the plug is contained in a container supported by a carriage which is moved from the plug recovering position to the inlet guide provided in front of the mill along a straight transfer rail positioned at an angle with respect to the pass line of the mill and at a speed sufficient to impart a predetermined moment of inertia to the plug. When the carriage is advanced to a position near the inlet guide, the carriage is rapidly stopped to eject and supply the plug to the front end of the mandrel bar by utilizing the moment of inertia.