摘要:
A generator (100) includes a generator winding (103) and an excitation winding (104), and a field winding (102). To converge an output voltage of the generator winding (103) to a target, a field current is varied by increasing/decreasing an energization duty ratio of a switching device (110) connected to the field winding (102). In a duty ratio zero determination unit (2) and a duty ratio zero continuation determination unit (3), when an output duty ratio continues for a predetermined time with duty ratio zero, a duty ratio increase amount restriction unit (4) restricts an upper limit of the duty ratio to a predetermined upper limit when the field current increases. A duty ratio restriction unit (21a) for restricting the duty ratio by a maximum value determined based on a voltage of a smoothing capacitor (113) in place of the determination of the duty ratio being zero may be provided.
摘要:
A generator (100) includes a generator winding (103) and an excitation winding (104), and a field winding (102). To converge an output voltage of the generator winding (103) to a target, a field current is varied by increasing/decreasing an energization duty ratio of a switching device (110) connected to the field winding (102). In a duty ratio zero determination unit (2) and a duty ratio zero continuation determination unit (3), when an output duty ratio continues for a predetermined time with duty ratio zero, a duty ratio increase amount restriction unit (4) restricts an upper limit of the duty ratio to a predetermined upper limit when the field current increases. A duty ratio restriction unit (21a) for restricting the duty ratio by a maximum value determined based on a voltage of a smoothing capacitor (113) in place of the determination of the duty ratio being zero may be provided.
摘要:
A steam turbine 3 includes: a turbine rotor 4; a rotor blade 5 implanted to the turbine rotor 4; a stator blade 6 provided at an upstream side of the rotor blade 5; and a turbine casing 13 supporting the stator blade 6 and including the turbine rotor 4, the rotor blade 5 and the stator blade 6, and have a constitution in which a stage 7 is formed by a pair of the rotor blade 5 and the stator blade 6, and a steam passage 8 is formed by arranging plural stages 7 in an axial direction of the turbine rotor 4. A surface treatment to suppress an increase of a surface roughness caused by oxidation is performed for at least a part of a surface of the stator blade 6 and a surface of the rotor blade 5.
摘要:
A choke valve is controlled finely suited to the running state of an engine. A throttle valve 8 and a choke valve 9 are provided in series on an intake pipe 6, and the opening degree of the choke valve 9 is controlled by a stepping motor 11. A choke valve opening degree upon start of engine (start opening degree) and a driving pulse rate of a stepping motor 11 are determined depending on the engine temperature. When lower than the engine temperature TL, the pulse rate is set at first rate, or the lowest rate in a specified range. Depending on the engine temperature, the pulse rate is set higher gradually up to second rate TH. When releasing the choke gradually in warm-up operation, the pulse rate is lowered so as to obtain a choke opening degree of high precision by a high torque.
摘要:
An information recording apparatus for recording tracks includes: a rotation drive section (RDS) that supports and rotates a master disk with a resist layer; an exposure beam emitting section (EBES) deflectably applying an exposure beam to the disk to form a spot thereon; a relative movement drive section (RMDS) translating the RDS relatively to the spot in a radial direction of the disk; an emission controller supplying the EBES with an instruction for modulating an intensity of the exposure beam according to data to be recorded; and a movement controller supplying the RMDS with an instruction for moving the RDS with the rotating disk by a predetermined moving amount for each disk rotation. The apparatus also includes a deflection controller supplying the EBES with instructions for deflection operations for deflecting the exposure beam in a manner that the spot is successively moved from a first exposure start position in either the opposite or the same direction to a moving direction of the RDS and then, at a point in time when the spot has moved up to an exposure stop position of the disk in predetermined rotation thereof, the spot is intermittently moved to a second exposure start position in the moving direction of the RDS, and wherein the spot is periodically returned to the first exposure start position.
摘要:
The present invention relates to a polishing apparatus for polishing a workpiece, such as a semiconductor wafer, to a flat mirror finish. The polishing apparatus comprises a polishing table having a polishing surface, and a top ring, and the workpiece is interposed between the polishing table and the top ring and pressed at a predetermined pressure to polish the workpiece. The polishing apparatus comprises at least two dressing units for dressing the polishing surface by being brought into contact with the polishing surface, which is a surface of a polishing cloth.
摘要:
It is an object of the invention to provide the operability of an engine power generator having a remote controller. A starting switch 90 of a remote controller 9 and a starting switch on a power generator body's side can be operated in parallel. A stopping switch 91 of the remote controller 9 and a stopping switch on the body's side can be operated in parallel. The stopping switch 91 and an oil level switch 26 are connected to each other in parallel. The starting switch 90 and the stopping switch 91 can be operated when a combination switch 12 is in ON position. An engine 2 can be started and stopped by switching operation on the body's side in parallel to remote control operation.
摘要:
A steering control system for calculating straight lines connecting reference points which are set at at least three positions around a work area, detecting the advance direction of a moving vehicle placed at a travel start position and the relative angles thereof with respect to the respective straight lines, and selecting as a reference line a particular one of the respective straight lines for which the relative angle is close to a preset particular angle. The moving vehicle is caused to travel a plurality of straight courses extending in a predetermined direction relative to the reference line and placed at predetermined intervals, and to travel transfer courses for moving from one to another of the straight courses.
摘要:
A position detecting system of a moving vehicle wherein a light beam scanned around the vehicle to be reflected by reference retroreflective means is received on the vehicle, the azimuth of each retroreflective means to be detected in the next scan is predicted, the azimuth of a particular incident light which forms the smallest angle with the predicted azimuth and is detected between two reference point discrimination azimuths preset at both sides of the predicted azimuth is judges to be that of an expected reflecting means and utilized for the position detection of the moving vehicle. When the expected retroreflective means is missed in a turning course, a previously known included angle which is formed by two straight lines connecting a turn center to said missing retroreflective means and another retroreflective means disposed just before, respectively, is added to the azimuth of the another retroreflective means in the next scan, and the resultant sum angle is used as the azimuth for the missing retroreflective means.
摘要:
A steering control system wherein a light receiving means rotating integrally with a light scanning means is mounted on a moving vehicle, and a light beam is scanned around the moving vehicle in the circumferential direction and the light beams reflected by at least three light reflecting means are sequentially detected by the light receiving means to detect the position of the moving vehicle on the basis of the reflected light beams so as to travel the vehicle along a predetermined traveling course. The reference direction of a photosensor used for the light beam scanning is maintained between predetermined adjoining two light reflecting means and the steering control is performed in dependance upon the positional information of the moving vehicle calculated on the basis of the detected azimuths of the reflected light beams if the number of reflected light beams detected during one revolution of the light beam is equal to the number of the disposed light reflecting means.