Abstract: A wind turbine generator includes: a main shaft; a generator having a rotor and a stator; and a sleeve coupled to the rotor and inserted onto the main shaft. The stator includes: stator magnetic poles arrayed circumferentially of the main shaft; and first and second stator plates rotatably coupled to the main shaft to support the stator magnetic poles. The rotor includes: rotor magnetic poles and at least one magnetic pole supporting structure coupled to the main shaft to support the rotor magnetic poles and provided between the first and second stator plates such that the rotor and stator magnetic poles are detachable from the sleeve. Positions at which the rotor and stator magnetic poles are detachable from the sleeve are closer to the main shaft from a closer end of the main shaft to the generator.

Abstract: Provided is a photoelectric conversion device fabrication method that realizes both high productivity and high conversion efficiency by rapidly forming an n-layer having good coverage. The fabrication method for a photoelectric conversion device includes a step of forming a silicon photoelectric conversion layer on a substrate by a plasma CVD method. In the fabrication method for the photoelectric conversion device, the step of forming the photoelectric conversion layer includes a step of forming an i-layer formed of crystalline silicon and a step of forming, on the i-layer, an n-layer under a condition with a hydrogen dilution ratio of 0 to 10, inclusive.

Abstract: A load is based calibrate on data collected under wide observation conditions and promptly calibrate loads of a plurality of wind turbine blades. A load measuring apparatus is applied to a wind turbine in which a pitch angle of a wind turbine blade is variable. The apparatus includes a sensor for obtaining a distortion of the wind turbine blade; a load calculating unit having a function expressing a relation between the distortion of the wind turbine blade and a load on the wind turbine blade, for obtaining the load on the wind turbine blade by applying to the function the distortion based on measurement data of the sensor; and a calibration unit for calibrating the function based on the measurement data of the sensor obtained in a pitch angle range and a rotational speed range of the wind turbine blade in which a variation between maximum and minimum aerodynamic torques is equal to or less than a predetermined value.

Abstract: A control method for a wind turbine generator and storage battery unit connected to a power grid in parallel, includes calculating total active power and total reactive power, and switching between: a first mode in which the generator outputs turbine required active power and reactive power that can be outputted by the generator and the battery unit outputs battery required active power and battery required reactive power which correspond to a difference between the total active power and the turbine required active power and a difference between the total reactive power and the turbine required reactive power respectively; and a second mode in which the battery required active power is maintained and the battery required reactive power is reduced while the turbine reactive power is increased by an amount of the reduction of the battery required reactive power wherein apparent power exceeds a set battery unit apparent power.

Abstract: A wind turbine generator is provided with a generator which is provided with a stator and a stator casing accommodating a generator rotor and the stator; a main shaft having one end coupled to a wind turbine rotor and the other end coupled to the generator rotor; a first bearing which rotatably supports the main shaft; a second bearing which is provided on the main shaft to support the stator casing such that the main shaft and the stator casing are rotatable relative to each other; a base to which the first bearing is attached; and a torque support including a coupling member which couples the base portion and a front plate of the stator casing. The load center of force acting between the coupling member and the front plate in a case that torque acts on the stator casing in the circumferential direction of the main shaft is positioned in a range between the front and back surfaces of the front plate.

Abstract: It is an object to make it possible to completely or partially eliminate a yaw driving device and to reduce power consumption in a nacelle. A moment around a wind-turbine tower axis is calculated; an angle command value around the wind-turbine tower axis is calculated by adding a yaw-control command value to a reference command value for canceling out the moment; and a pitch angle command value of each wind turbine blade is set on the basis of the angle command value around the wind-turbine tower axis.

Abstract: A guided vehicle transportation system is described in the application. The system includes guard wheels and a guard rail positioned along a center line of a guide track. The guard rail has a groove in which the guard wheels are received with a predetermined clearance between the periphery of the guard wheels and side walls of the groove. The guard rail has a flange extending toward the groove at the top of each side wall. The vehicle has first arms extending in longitudinal direction and being attached rotatably at a central part of an axle provided for suspending each pair of front wheels and rear wheels, and the guard wheels are attached rotatably and directly to the both end parts of the first arms or attached rotatably to both end parts of second arms each of which is attached to a corresponding end part of the first arms.

Abstract: A wind turbine generator is provided in which a gear having a large diameter is not required in a yaw drive device (30) of a yaw system (10A). The yaw drive device (30) of the yaw system (10A), which revolves a nacelle (3) depending on the wind direction, includes a electric motor (31) which is fixedly provided on a nacelle base plate (12), with an output shaft (31a) substantially aligned with a pivot of the nacelle (3). The output shaft (31a) and a fixed-side support member (2b) provided in the vicinity of an upper end of the tower (2) are coupled by a coupling shaft (33) having couplings (32) provided at both ends thereof.

Abstract: Provided is a wind power generation system intending to suppress an increase of torque when a voltage in a utility grid is restored, and to reduce a load to devices due to the torque. The blade control unit controls the pitch angle of the wind turbine blades such that a rotation speed of the power generator becomes equal to or greater than a synchronous rotation speed when the power control unit de-actuates the operations of the converter and the inverter, and controls the pitch angle of the wind turbine blades such that the pitch angle matches a target pitch angle that is determined based on one of a wind speed, a rotation speed of the power generator, and a requested output power when the power control unit re-actuates the operations of the converter and the inverter.

Abstract: A speed-varying device (10A) that can give a high gear ration with a small number of stages and that can be reduced in weight is provided. The speed-varying device (10A) is configured by combining parallel gears, and an input gear (11) provided on an input shaft (Si) and an output gears (12A, 12B) provided on an output shaft (So) are coupled to each other via a plurality of pinion shafts (Sv) that are arranged in the circumferential direction. The pinion shafts (Sv) are each provided with gears (13, 14A to 14D) having teeth different in number at both ends thereof. The gears (14A to 14D) disposed on the output shaft (So) side of the plurality of pinion shafts (Sv) are engaged with the plurality of output gears (12A, 12B) alternately in the circumferential direction. The output gears being arranged so as to be shifted from one another in the axial direction of the output shaft (So).

Abstract: The essential feature of the present invention is the provision of a track transportation system in which a vehicle runs on a predetermined track, being automatically steered, having a simplified and lightweight structure so as to surely ensure a safety, and to be capable of carrying out efficient and high-speed operation. The track transportation system according to the present invention incorporates a steering mechanism for automatic steering by means of an M actuator, a protection guide rail laid on the track, protection guide wheels which travel together with the vehicle along the protection guide rail without making contact with the latter, and a control means for controlling automatic steering in accordance with a result of determination by a track data determining means for determining a straight portion, a curved portion, a turnout portion or the like of the track in view of vehicle position data, and steering caused by the protection wheels making contact with the protection guide rail.

Abstract: In a wind generator, which effectively utilizes an opening of a door opening and a shell plate, and in which an outside air-circulation flow path for introducing outside air into a cooling heat exchanger in a tower is formed, a cooling medium that cools a heating element disposed in the tower circulates through a cooling heat exchanger, and heat is absorbed by exchanging heat with outside air, an outside air-circulation flow path of a closed space having an outside-air inflow opening and an outside-air discharge opening that are in communication with a door opening of a shell plate is formed in an interior space in the tower, and the cooling heat exchanger is disposed in the outside air-circulation flow path.

Abstract: The present invention provides a technique for rapidly removing frost accumulated in air-refrigerant cooling apparatuses. An air-refrigerant cooling apparatus in accordance with the present invention includes a bypass line for directly supplying a defroster with refrigerant air having an increased temperature from a compressor, avoiding temperature drop by a heat exchanger and an expansion turbine. Moisture of the frost melted in the defroster is externally exhausted by a fan.

Abstract: A wind turbine generator includes a tower, a nacelle mounted on the tower, at least one cable suspended downward from the nacelle inside the tower, a protective tube attached to the cable to surround the cable, and a cable swing restraint support attached to the tower and provided in a position opposed to the protective tube to surround the protective tube. The protective tube is relatively movable with respect to the cable swing restraint support.

Abstract: An object is to improve the operating rate. A first switch is provided in a power line connecting a power generator to a power system, and a second switch that can be opened and closed by remote control is provided in the power line between the power generator and the first switch. In the second switch, a withstand current capability is set that allows current flowing in a low-voltage event and that withstands current having a value equal to or less than a current value specified by the thermal setting of the power generator. In the first switch, a withstand current capability is set that is superior to the withstand current capability of the second switch and that withstands current having a value equal to or less than the current value specified by the thermal setting of the power generator.

Abstract: There is provided a wind turbine generator that includes an improved grease supply and discharge system of lubricant oil used in a blade rotating ring bearing of a wind turbine blade, and can reliably recover discharged grease. The wind turbine generator includes a pitch control mechanism that can adjust a pitch angle of the wind turbine blade via the blade rotating ring bearing provided between the wind turbine blade and a rotor head, a grease supply and discharge device is provided in the rotor head, and the grease supply and discharge device includes a grease supply device that pumps lubricant oil in a supplied grease tank with a grease supply pump and supplies the lubricant oil to the blade rotating ring bearing, and a grease discharge device that forcibly sucks and recovers the discharged grease from the blade rotating ring bearing.

Abstract: A rotor turning device for a wind turbine generator which can be used without having to modify the existing wind turbine generator. A rotor turning device includes, on the inner periphery, a first member acting as a fixing member for fixing to a coupling hub, and on the outer periphery, a second member acting as an operating member to which operational force for rotating a rotation axis of the wind turbine generator. A pair of the first members embracingly fixes to the coupling hub of a coupling, while the second member attaches to the pair of first members to form a handle-like shape.

Abstract: The present invention provides a wind turbine generator in which an oil seal structure provided in a blade rotating ring bearing of a wind turbine blade is improved and leakage of lubricant oil to outside is prevented or suppressed.

Abstract: According to a steering control method, before starting, a pattern steering angle table on which pattern steering angles for the front and rear wheels at respective change points of the track are listed is prepared in view of a track condition, etc. from a departure point to a destination point, a vehicle is steered in accordance with a pattern steering angle read from the table, a track widthwise position of the vehicle on running is detected so as to calculate correcting steering angles by which the track widthwise position of the vehicle coincides with a desired position, and the correcting steering angles are added to pattern steering angles so as to obtain desired steering angles by which the front wheels are steered. The pattern steering angle, the corrected steering angle and the desired steering angle are calculated for each of the front and rear wheels, independent from each other.

Abstract: A wind turbine generator tower is configured by arranging and connecting a plurality of approximately cylindrical tower sections in their axial direction. Each of the tower sections includes an approximately cylindrical tower section main body, and a plurality of approximately flat-plate protruding parts that are formed so as to protrude along the axial direction at at least an axis-wise end portion of the tower section main body on an outer circumferential surface and/or an inner circumferential surface of the tower section main body. The plurality of tower sections are connected when the protruding parts of one of the tower sections and the protruding parts of another one of the tower sections are friction-jointed with fastening means.