Abstract: A wind driven electrical power generating apparatus includes a rotor rotating by receiving wind force, a gear assembly having an input shaft connected to the rotor, a generator connected to an output shaft of the gear assembly, a sensor for detecting generating capacity of the generator and a controller for varying gear ratio of the gear assembly based on a signal from the sensor. In this construction, the controller controls so that the generator keeps rotating at around the lowest rotational speed within a range of rotational speed, the range being determined so as to include a maximum power operation region of the generator. Alternatively, the controller controls so that rotational speed of the output shaft of the gear assembly is adjusted to at around the lowest rotational speed within a range of rotational speed, the range being determined so as to include a rated power region as an upper operational limit.

Abstract: A wind driven electrical power generating apparatus includes a rotor rotating by receiving wind force, a gear assembly having an input shaft connected to the rotor, a generator connected to an output shaft of the gear assembly, a sensor for detecting generating capacity of the generator and a controller for varying gear ratio of the gear assembly based on a signal from the sensor. In this construction, the controller controls so that the generator keeps rotating at around the lowest rotational speed within a range of rotational speed, the range being determined so as to include a maximum power operation region of the generator. Alternatively, the controller controls so that rotational speed of the output shaft of the gear assembly is adjusted to at around the lowest rotational speed within a range of rotational speed, the range being determined so as to include a rated power region as an upper operational limit.

Abstract: A wind driven electrical power generating apparatus includes a rotor rotating by receiving wind force, a gear assembly having an input shaft connected to the rotor, a generator connected to an output shaft of the gear assembly, a sensor for detecting generating capacity of the generator and a controller for varying gear ratio of the gear assembly based on a signal from the sensor. In this construction, the controller controls so that the generator keeps rotating at around the lowest rotational speed within a range of rotational speed, the range being determined so as to include a maximum power operation region of the generator. Alternatively, the controller controls so that rotational speed of the output shaft of the gear assembly is adjusted to at around the lowest rotational speed within a range of rotational speed, the range being determined so as to include a rated power region as an upper operational limit.

Abstract: A wind driven electrical power generating apparatus includes a rotor rotating by receiving wind force, a gear assembly having an input shaft connected to the rotor, a generator connected to an output shaft of the gear assembly, a sensor for detecting generating capacity of the generator and a controller for varying gear ratio of the gear assembly based on a signal from the sensor. In this construction, the controller controls so that the generator keeps rotating at around the lowest rotational speed within a range of rotational speed, the range being determined so as to include a maximum power operation region of the generator. Alternatively, the controller controls so that rotational speed of the output shaft of the gear assembly is adjusted to at around the lowest rotational speed within a range of rotational speed, the range being determined so as to include a rated power region as an upper operational limit.

Abstract: The constant velocity joint comprises an outer joint member 1 in which eight linear guide grooves 1b are axially formed on an inner cylindrical surface 1a thereof, an inner joint member 2 in which eight linear guide grooves 2b are axially formed on an outer spherical surface 2a thereof and serrations 2c for connecting a shaft are formed on an inner surface thereof, eight torque transmitting balls 3 disposed in the ball tracks formed by cooperation of the guide grooves 1b of the outer joint member 1 and the guide grooves 2b of the inner joint member 2, and a cage 4 for retaining the torque transmitting balls 3. The spherical center B of the outer spherical surface 4b and the spherical center A of the inner spherical surface 4a of the cage 4 are respectively offset equidistantly to the opposite side in the axial direction with respect to the center 0 of the pocket 4c.

Abstract: Relief portions 1c1, 1c2 are formed at the boundary regions between the guide groove 1a and the inner peripheral surface 1b, and are respectively positioned at the inner side and the inlet side taking a joint center position 0 as a reference. The relief portions 1c1, 1c2 are gradually increased toward the end portions of the guide groove 1a. Groove depths ( .theta.1, .theta.2) of the guide groove 1a at the left region and the right region are identical to each other in all cross-sections orthogonal to the groove bottom line L, and the groove depth is the largest (.theta.2) at the center region including the joint center position 0, and is gradually decreased from the center region toward the both ends. (.theta.1: .theta.2>.theta.1).

Abstract: A cross-groove type homokinetic joint which requires no boot adaptor and is thus less expensive and which is provided with an arrangement for preventing the balls from dropping out while keeping a large working angle of the shaft. The cross-grooved homokinetic joint has an inner ring having grooves in its outer surface, balls received in the grooves of the inner ring, a cage retaining the balls, and an outer ring having grooves in its inner surface. The balls are guided by the grooves of the outer ring. This joint has no boot adaptor. The boot is directly fixed to the outer ring. A circlip is fitted on the inner surface of the outer ring near its open end to prevent the balls from dropping out.