Abstract: The system has an imaging unit configured to image a work space at a viewpoint position in a visual line direction of a worker together with a workpiece on which a component is mounted, a position attitude information obtaining unit configured to obtain a position attitude information which indicates a relative position attitude relation between the viewpoint of the worker and the workpiece in the work space, a virtual image generating unit configured to generate a three-dimensional virtual image indicating the component after being mounted at the viewpoint position in the visual line direction, an image composing unit configured to generate a composite image by superimposing the virtual image on a real image of the work space, and a display unit configured to display the composite image. According to the system, efficiency of the component mounting work can be considerably improved by using the mixed reality technology.

Abstract: The system includes imaging unit configured to image a work space at a viewpoint position in a visual line direction of a worker together with a workpiece, a position attitude information obtaining unit configured to obtain a position attitude information which indicates a relative position attitude relation between a viewpoint of the worker and the workpiece in the work space, a virtual image generating unit configured to generate a three-dimensional virtual image which indicates a completed shape of the workpiece in the viewpoint position and the visual line direction of the worker based on the position attitude information, an image composing unit configured to generate a composite image by superimposing the virtual image on a real image of the work space, and a display unit configured to display the composite image. According to the system, efficiency of workpiece machining work can be considerably improved by using the mixed reality technology.

Abstract: It is disclosed that novel polypeptides which has enhanced expression levels in the synovial tissues of human chronic rheumatoid arthritis (RA) patients compared with the synovial tissues of human osteoarthritis (OA) patients, polynucleotides encoding the polypeptides, vectors comprising the polynucleotides, transformant cells comprising the vectors and an antibody against the polypeptide. It is also disclosed that polynucleotides specifically hybridizing with the polynucleotides and having at least 15 nucleotides, a detection method which is useful for RA diagnosis, and a detection kit which is useful for RA diagnosis.

Abstract: In order to keep constant an outlet temperature of a refrigerant for cooling a semiconductor power device, continuous and variable control of flow rate of the refrigerant is performed. At the same time, a variable speed fan is continuously and variably controlled in response to a temperature control so that an inlet temperature of the refrigerant is kept constant.

Abstract: A power semiconductor switching device comprises a mounting board (110) on which a reverse bias driving circuit (20) for applying a reverse bias between the control electrode and one of two main electrodes of a GTO element (11) housed in a flat package is contained. The mounting board (110) has a through hole through which the main electrode of the GTO element (11) penetrates so that the flat package is located in the proximity of the through hole and the perimeter of the through hole partially surrounds the flat package, and a conducting member formed on one surface of the mounting board (110) and electrically connected to the control electrode of the GTO element (11).

Abstract: A power conversion apparatus includes a current component control section which outputs q axis and d axis negative-sequence components and q axis and d axis positive-sequence components based on a detected current value or a voltage value, a current component control which compares a current component with the current instruction value from an instruction value generator and outputs to an adder/subtractor the result, a converter converting a control signal output from the adder/subtractor into three-phase components, and an adder adding these three-phase components to respective phases and outputting the result to a power conversion section.

Abstract: A compensation control device for a power system includes a switched capacitor connected in series with a transmission line, a voltage applying control connected in series with the transmission line, and a ganged control for controlling on/off operation of the switched capacitor and a linearizing voltage generated by the voltage applying control. The control ensures that a sum voltage of a stepped voltage generated across the switched capacitor and the linearizing voltage produced by the voltage applying control and that is applied to the transmission line is continuous. The control device realizes controllability of the total impedance of the transmission line and reduces the capacitance of the parts employed in the ganged control.

Abstract: A voltage source type power converting apparatus having voltage source type power converter units and phase-shifting transformers. The transformers have either a common multiple-phase primary winding or a group of parallel connected multiple-phase primary windings, either of which being connected in parallel or series to a multiple-phase AC system. The transformer further include a group of multiple-phase secondary windings with phase differences with respect to each other and which are connected to voltage source type power converter units. The voltage source type power converter units are operated with the phase differences. Accordingly, the construction of the multiplexing phase-shifting transformer is simple, and fundamental electric variables can be controlled by a simple phase controlling operation. In addition, a higher harmonic defect of the AC system can be reduced, and the DC voltage can be easily raised.

Abstract: A power system compensator apparatus comprising a power converter unit that works in series with the transmission of a power system and switching control means for controlling the link voltage (V.sub.LINK) of the non-power system side. The switching control means controls the phase of, at least, the fundamental frequency of the power system. The power converter unit contains a static power converter transformer with phase differences taking place the secondary windings of the power converter unit. The static power converter unit is operated in non-PWM or fixed pulse width ratio. Switching rate is minimized. Loss is lowered while economy of operation is improved. Since the voltage that works in series with the power transmission line is controlled, direct compensation of system reactance voltage and direct control of line current are performed. Improved performance thus results.

Abstract: A power converter apparatus has a solid-state switching device 11 for cutting off a current flowing from a DC power supply 1 to a bridge circuit 2 when reverse-biasing thyristors in the bridge circuit 2, and an inductance element 12 and an auxiliary solid-state switching device 13 connected in series between positive and negative DC lines interconnecting the DC power supply 1 and the bridge circuit 2 through the solid-state switching device 11. A magnetic energy is stored in the inductance element 12 during an interval of time in which the solid-state switching device 11 and the auxiliary solid-state switching device 13 are rendered conductive. The magnetic energy is discharged to reverse-bias the thyristors.

Abstract: A self-turn-off type semiconductor switch comprising a gate-reverse biasing thyristor and a transistor connected in parallel to each other wherein the load current is shunted to the transistor, thus causing the thyristor to be turned off.

Abstract: A semiconductor switch device is disclosed with a main current passing through a main current path and a main semiconductor switch which has control electrode and a main electrode inserted into the path. A first winding is inserted into the electric path and a second winding is magnetically coupled to the first winding through a core and is connected between the control electrode and one main electrode of the main semiconductor switch. A third winding having a number of turns greater than the second winding is likewise magnetically coupled to said first winding.

Abstract: A power semiconductor switching device comprises a first transistor which has semiconductor layers whose conductive types are alternately different in a first pattern and has an emitter connected to one end of a main circuit including a load; a second transistor which has a collector connected to the base of the first transistor, a base connected to the collector of the first transistor, an emitter connected to the other end of the main circuit, and semiconductor layers whose conductive types are alternately different in a second pattern; and a control transistor which has a paired main electrodes connected in parallel between the base and the emitter of at least one transistor in the first and second transistors to control load current passing between the emitter of the first transistor and the emitter of the second transistor by control of the base.

Abstract: A semiconductor element comprises the first conductive type first semiconductor layer (11) which has an exposed surface at the first surface side to contact with the first contact (21);the second conductive type second semiconductor layer (12) which forms the first PN junction J.sub.1, with the first semiconductor layer (11) and has an exposed surface at the first surface side to contact with the first contact (21);the first conductive type third semiconductor layer (13) which forms the second PN junction J.sub.2 with the semiconductor layer (12) and has an exposed surface at the second surface side; and the fourth semiconductor layer (14) which forms the third PN junction J.sub.

Abstract: A system for driving an inductor type synchronous motor for minute control thereof which includes an inductor type synchronous motor having a circuit for driving m phases of driving windings and first magnetic teeth. A second group of magnetic teeth is provided facing the first group of magnetic teeth. Apparatus is provided for feeding electric current from a DC power source to the driving windings of the respective phases. The driving winding for one phase intersects the flux of a partial set of first magnetic teeth or at least two magnetic teeth to provide a flux-interlink. A group of solid state switches are interposed between the source for producing the electric current and the driving windings of the respective phases. A distribution pattern generator generates patterns in response to a command signal and controls the on-off states of the solid-state switches with the noted patterns to thereby form the electric current into trigonometric-functional-patterns.

Abstract: A synchronous machine drive apparatus is provided with a first exciting winding or windings having a first axis and second exciting windings having a second axis. A DC current responsive to the current of the armature windings is applied to the second DC exciting winding. A fundamental exciting current component I.sub.FO and an additional exciting component .DELTA.I.sub.F responsive to the current of the armature windings are applied to the first DC exciting winding or windings, whereby with respect to the current distribution around the gap of the synchronous machine, the armature reaction is correctly compensated.

Abstract: A variable frequency power supply device supplies an AC power to a squirrel-cage motor through an AC parameter control. The control receives a command active current resulting from a command torque and a command exciting current to generate a resultant current and its phase. The command torque is produced from the actual and command motor speeds and the exciting current is caused from the actual motor speed. The control also receives a command frequency determined by the actual motor frequency and a command slip frequency also resulting from the command torque. The control controls the firing phases of thyristors in the power supply device in response to the command current, phase and frequency. The control may generate a voltage for supplying the active current and an exciting voltage to similarly control the firing phases of the thyristors. In the latter case, the exciting voltage may be added with its differential to compensate for a rapid change in active current.

Abstract: An AC motor having AC windings with an internal electromotive force is driven by an electric valve feeding apparatus having electric valves commutated by the internal electromotive force of the AC windings. The commutation of the electric valve is carried out under the condition of U>.pi./m where m designates the number of commutation times per AC cycle of the electric valve feeding apparatus and U designates a commutation overlapping angle of the electric angle to feed the current to the AC windings whereby the motor is driven by the electric valve feeding apparatus.

Abstract: A transformer device comprises a saturable magnetic core having control and controlled windings, the saturable magnetic core being controlled in a feedback mode through switch means such as transistor switch means. The transformer device may comprise two magnetic cores and changes in magnetic resistance between the two magnetic cores are differentially fed back and amplified to cause an oscillative switch means to be turned on and off. A current to be detected flows in the control winding and detected by the controlled winding. The detected output corresponds to the polarity and the absolute value of the current supplied to the control winding. The transformer device not only can detect or measure the primary current but can identify the polarity thereof, differing from prior art dc current or potential transformers. The transformer device of the invention operates substantially free of slot-ripple inherent in the prior art transformer.

Abstract: A semiconductor switch device comprising: a main power source for supplying main current; a load connected to one side of said main power source; a semiconductor switch having first and second main current electrodes and a control electrode, the first main current electrode being connected to the other side of the main power source, the semiconductor switch being rendered conductive across the main current electrodes when a forward current is supplied to the control electrode; a current transformer having a core, a primary winding and a secondary winding, the primary winding being connected between the second main current electrode of the semiconductor switch and the load, and the secondary winding being connected at one end to the control electrode of the semiconductor switch, whereby a forward current responsive to the main current flowing in the primary winding is supplied from the secondary winding to the control electrode; and an auxiliary power supply connected between the other end of the secondary win