摘要:
Provided is a test apparatus that tests a device under test, including a vector expanding section that sequentially generates a plurality of test vectors; a predicting section that calculates a predicted value for each test vector by simulating an operation of the device under test, the predicted value indicating a prescribed characteristic value of the device under test to be measured while the device under test is supplied with a test signal corresponding to the test vector; a measuring section that obtains a measured value for each test vector by measuring the prescribed characteristic value of the device under test each time the device under test is supplied with a test vector; and a judging section that judges whether the device under test is defective based on a ratio between the predicted value and the measured value corresponding to each test vector.
摘要:
A circuit board for supplying therethrough an electric current to a stator including windings arranged to generate magnetic fields includes a body portion having a rectangular shape when seen in a plan view and mounted with electronic parts, and an extension portion protruding from the body portion substantially along a circumferential direction around a rotation axis of the motor when seen in a plan view. The extension portion includes a distal end extension opposed to the body portion through a gap when seen in a plan view. The transverse width of the extension portion is smaller than the gap. The body portion includes an outward connector portion connected to an external power source or an external circuit board. The extension portion includes a winding connection portion connected to the outward connector portion through a wiring portion. The windings are soldered to the winding connection portion.
摘要:
A suspension apparatus includes a single-phase linear motor, a state detecting sensor and a controlling portion. The single-phase liner motor includes a coil and a permanent magnet. The coil is adapted to be provided at one of a vehicle body-side member and a wheel-side member of a vehicle. The permanent magnet is adapted to be provided at the other of the vehicle body-side member and the wheel-side member of the vehicle. The state detecting sensor detects a relative moving state between the vehicle body-side member and the wheel-side member and an absolute moving state of the vehicle body-side member. The controlling portion controls a load outputted by the single-phase linear motor on the basis of a result detected by the state detecting sensor.
摘要:
A process for preparing a fluoropolymer by polymerizing one or more radically polymerizable monomers comprising at least one fluoroolefin monomer in the presence of a radical polymerization initiator and as case demands, an inactive fluorocarbon and chain transfer agent in a reaction field where at least one of components forming the reaction field is in a supercritical state. According to the preparation process, generation of unstable end groups of the polymer, a decrease in a purity and complicated post-treatment can be eliminated.
摘要:
A process for preparing a fluoropolymer by the batchwise polymerization of a monomer mixture containing tetrafluoroethylene, in which, after the initiation of a reaction, the monomers are reacted under conditions such that the monomer mixture is supplemented to a polymerization system in an amount more than the amount of the monomers consumed and simultaneously the excessive unreacted monomers are discharged from the polymerization system to maintain the monomer composition in the polymerization system substantially the same as that of the composition of the monomer mixture initially charged, and the monomer mixture supplemented to the polymerization system contains a compound suppressing the autoexplosion of the monomers.
摘要:
An optical device equipped with a mirror which reflects light, include a plurality of first receiving parts that touch one face of one of ends in a lengthwise direction of the mirror; a plurality of first pressing parts that touch a face opposing to the face to which the first receiving parts touch, and press the mirror with elastic force toward the first receiving parts.
摘要:
A brushless motor driven by a sensorless driving circuit includes a rotating body capable of being rotated about a center axis; a rotor magnet arranged coaxially with the rotating body; a stator disposed opposite the rotor magnet; and at least one coil wound around the stator. The brushless motor is driven according to a signal containing a third harmonic component relative to a fundamental wave component in an induced electromotive force. Further, an amplitude ratio of the third harmonic component to the fundamental wave component in the induced electromotive force generated in the coil preferably is about 1% or higher.
摘要:
A linear motor coil includes a first coil portion, a second coil portion, the first coil portion and the second coil portion being arranged across a partition wall, a first connecting portion provided between the first coil portion and the second coil portion and by means of which the conductive wire crosses to the first coil portion from the second coil portion while a winding direction of the conductive wire is reversed, and a second connecting portion by means of which the conductive wire crosses to the second coil portion from the first coil portion while the winding direction of the conductive wire is reversed. The conductive wire is formed by a single wire and of which a winding start point and a winding end point are provided at an end portion of the first coil portion at a side opposite from a side where the partition wall is provided.
摘要:
Machine tool with: a bed furnished with a base and two side walls provided standing along respective left and right sides of the base; a first saddle composed of a rectangular frame, with vertical sides provided perpendicularly and transverse sides provided sideways, and both ends of the frame sideways being supported on rear faces of the side walls so as to be perpendicularly movable; a second saddle arranged within the first-saddle frame and provided to be movable sideways, and having a front-to-rear penetrating through-hole; a spindle head arranged in the second-saddle through-hole and provided to be movable back-and-forth; a tool-retaining spindle supported, by the spindle head, with its axis paralleling the front-to-rear orientation and rotatable about its axial center; and, arranged on the bed, a table on which workpieces are set.
摘要:
There are provided a pressure intensifying cylinder 2a for allowing a pressure intensifying chamber 31 to communicate with a head-side cylinder chamber 22 of a working cylinder 1 and its control hydraulic circuit. When a load and a rated pressure Pp of a hydraulic pump 25 are balanced with each other at the time of inserting and setting a core 41, a check valve 21 is closed and a sequence valve 34 is opened to move the pressure intensifying cylinder 2a forward, so that the pressure of the head-side cylinder chamber 22 is increased. A pressure intensifying ratio of the pressure intensifying cylinder 2a is set such that the pressure of the head-side cylinder chamber 22 is higher than pressure occurring with molding pressure.