摘要:
Provided is an insulated oxide superconducting cable conductor having a high critical current and a high critical current density. The insulated oxide superconducting cable conductor comprises an elongated former, a plurality of tape-shaped multifilamentary oxide superconducting wires which are wound on the former at a bending strain factor of not more than 0.5%, and a spirally wound tape-shaped insulating material covering the tape-shaped multifilamentary oxide superconducting wires. The tape-shaped multifilamentary superconducting wires are superposed on the former in layers, whereby stabilizing materials of the superposed superconducting wires are in contact with each other. The tape-shaped insulating material consists essentially of a material which is contracted at a thermal contraction rate of at least three times that of the tape-shaped multifilamentary wires by cooling from a temperature of 298 K to that of 77 K. The tape-shaped insulating material can apply a pressure to the superposed multifilamentary superconducting wires toward the former while improving electrical contact between the superposed multifilamentary superconducting wires by cooling in employment. The former can be formed of a flexible tube.
摘要:
A DC power supply apparatus includes an input-side rectifier which rectifies an input AC voltage and supplies the rectified voltage to a voltage-boosting converter. The voltage-boosting converter converts the supplied voltage to a voltage of a predetermined magnitude. The predetermined magnitude voltage is, then, converted to a high-frequency voltage by an inverter and applied to a primary winding of a transformer. An output-side rectifier rectifies a high-frequency voltage induced in a secondary winding of the transformer. The inverter includes IGBTs and diodes, which are connected in a full-bridge configuration. A capacitor is connected in parallel with each IGBT. When the IGBTs are rendered conductive by the charging and discharging of the capacitors, no current flows through the IGBTs, and when the IGBTs are rendered nonconductive, the voltages applied to the IGBTs are made to become zero.
摘要:
An automatic photosensitive material developing machine supplies a solid processing solution to be dissolved according to consumption of processing solution for a silver halide photosensitive material to be treated. The developing machine includes a solid processing solution supplying section for supplying the solid processing solution from a solid processing solution cartridge containing the solid processing solution, and a solid processing solution transferring section for receiving the solid processing solution supplied by the solid processing solution supplying section in a bucket, and for transferring the bucket upward.
摘要:
In an apparatus for supplying a solid processing agent to a processing tank of a photographic material processing apparatus, there is provide a put-back mechanism for putting a solid processing agent back into an accommodation container when the accommodation container is moved from a operating position to a maintenance position on which the accommodation container can be replaced with a new one.
摘要:
An apparatus for processing a photosensitive material includes a device to replenish a tablet of a solid processing agent into a processing tank in which a cross-section of the tablet is shaped in a circle. A container in which plural tablets are accommodated is detachably mounted on the device. The plural tablets are accommodated in such a manner that an outer circumference of each tablet is contacted with that of the others.
摘要:
The method and apparatus for manufacturing an artificial tooth crown which involves the formation of a metal crown, coating the crown with porcelain materials and subjecting the coated crown to high frequency vibrations of the order of 15 to 50 Hz to condense the porcelain materials and remove air and liquid therefrom prior to firing.
摘要:
The semiconductor device is included in the LED driving circuit (current regulator) of driving the LED array (with series-connected number m×parallel-connected number n), and is formed of a plurality (n pieces) of LED driving devices of controlling a current (constant-current driving) flowing in each string. A vertical semiconductor device, for example, a vertical MOSFET is used as the LED driving device. Both of a main device functioning as a constant-current driving device and a subsidiary device functioning as a circuit-breaking switch during dimming are formed inside a chip of the device, which are formed of the vertical semiconductor devices. In a first surface of the device, each source region of the main device and the subsidiary device is formed so as to be insulated from each other through an isolation region.
摘要:
A step down convertor with a distributed driving system. In one embodiment, an apparatus is disclosed that includes an inductor coupled to an output node. The apparatus also includes first and second circuits. The first circuit can transmit current to the output node via the inductor, and the second can transmit current to the output node via the inductor. The apparatus also includes a third circuit for modifying operational aspects of the first circuit or the second circuit based on a magnitude of current flowing through the inductor.
摘要:
A method can include obtaining a voltage across a first transistor as an obtained voltage. The method can also include multiplying the obtained voltage by a predetermined multiple M to yield a multiplied voltage. The method can further include applying the multiplied voltage to a second transistor, wherein the second transistor is N times smaller than the first transistor. The method can additionally include providing an output current of the second transistor as an M/N scaled estimate of an output current of the first transistor.