摘要:
A power converter apparatus has at least two converters CONV1 and CONV2. The DC side of each of the converters CONV1 and CONV2 is connected to a filtering capacitor Cd which serves as a DC power source for a load device LOAD. The AC side of the converter CONV1 is connected to the secondary winding of a first transformer TR1. The AC side of the converter CONV2 is connected to the secondary winding of a second transformer TR2. The primary winding of transformer TR1 is connected in series to the primary winding of transformer TR2. The series circuit of the primary windings of transformers TR1 and TR2 is coupled to an AC power supply SUP via a single AC reactor Ls. A control method of the invention is adapted to the power converter apparatus in which plural PWM converters are used. The phase of a modulating wave (carrier) of one PWM converter differs by a predetermined degree from that of another PWM converter.
摘要:
An automatic running work vehicle adapted to repeatedly work on the ground while automatically changing its running direction and provided with means for controlling the vehicle body so that the vehicle body will be automatically positioned, upon a change of direction after finishing one course, for the next course with its orientation and position in match with the boundary of the course.
摘要:
An automatic running work vehicle in which both front wheels and rear wheels can be steered and which is provided with a follower sensor for detecting the boundary between an unworked area and a worked area and an orientation sensor for detecting the running direction so as to run automatically along the boundary. Based on the result of detection of the boundary by the follower sensor and on the result of detection of the orientation of the vehicle body by the orientation sensor, the front and rear wheels are steered automatically to correct the running direction automatically.
摘要:
An AC current detection circuit is intended to detect whether an AC induction current for the rotor of the rotating anode X-ray tube flows or not. A current transformer is employed in the rotor supply circuit to generate a lower voltage at its output circuit by utilizing its magnetic-electric conversion effect. A transistor will switch on-off by receiving the generated voltage and produce a series of output pulse signals. A retriggerable monostable multivibrator will detect a missing pulse from the output pulse signals, which indicates a failure of the rotor supply operation.
摘要:
A wire-twisting machine for twisting individual wire-like structures into a cable, having a plurality of bobbins around which are wound the wire-like substance to be twisted, the bobbins being mounted on individual cradles which are supported at either end by disks secured to a common spindle, comprising: a drive mechanism having prime movers which are external to the bobbin-cradle assembly for controlling the speed of feeding the wire-like structure from its respective bobbin, thus resulting in constant wire-like structure tension, and another drive mechanism for controlling cradle rotation for fixing or adjusting the amount of twisting-back in said cable.
摘要:
A circulating current of a cycloconverter in each phase is distributed and controlled in such a way that a circulating current in a phase having a large absolute value of a load current is small, and the circulating current of a phase having a small absolute value of the load current is large. Therefore, the reactive power is so compensated that the sum of lagged reactive powers of the phases and advanced reactive power of a phase advancing capacitor cancel out each other.
摘要:
Novel 4-(2-oxo-1-cycloalkylidenemethyl)phenylacetic acid derivatives and non-toxic pharmaceutically acceptable salts thereof are useful as anti-inflammatory agents.The compounds may be prepared by reacting a p-formylphenylacetic acid ester derivative with an enamine of cycloalkanone and hydrolyzing the resulting product, or with a cycloalkanone in the presence of a base.
摘要:
A generation control apparatus for a vehicle generator detects the output voltage of an excitation current supplying rectifier circuit of the generator. When the output voltage is lower than a predetermined value, a switching element is turned on and a current for operating an indicator lamp is caused to flow through a resistor connected to the switching element, thus detecting a break in the generator circuit.
摘要:
A spinal joint distraction system for treating a facet joint including articular surfaces having a contour is disclosed and may include a delivery device including a generally tubular structure adapted to engage a facet joint, an implant adapted to be delivered through the delivery device and into the facet joint, the implant comprising two members arranged in opposed position, and an implant distractor comprising a generally elongate member adapted to advance between the two members of the implant causing separation of the members and distraction of the facet joint, wherein the implant is adapted to conform to the shape of the implant distractor and/or the articular surfaces of the facet upon being delivered to the facet joint. Several embodiments of a system, several embodiments of an implant, and several methods are disclosed including a method for interbody fusion.
摘要:
An image forming apparatus includes an image bearing member for carrying an electrostatic latent image; a developing device, containing a developer including a toner and a carrier, for developing the electrostatic latent image carried on the image bearing member into a toner image with the developer; a supplying device for supplying the toner to the developing device; a first detecting portion for detecting information on a temperature of the developing device; a second detecting portion for detecting information on a temperature of the supplying device; and a correcting portion for correcting, when detection results of the first and second detecting portions are different from each other, an image forming condition with increase of a supply amount of the supplying device.