摘要:
A disk-shape portion of a surface mount connector housing or a separate cap member provides an upwardly facing surface adherable by suction to a suction nozzle of a conventional, automatic, vacuum type pick-and- place assembly tool and are, respectively, either integrally joined to the connector at the mating face, by a frangible or severable portion, or releasably attached to the connector housing by resilient legs which grip the housing between them, enabling the connector to be carried into position on a circuit board by the tool.
摘要:
A method of fabricating a photovoltaic panel is disclosed which is formed by arranging a number of granular photovoltaic devices in an array and forming the array into the shape of a panel from a transparent resin and includes each photovoltaic device having a part protruding from the resin. The method includes filling an escape recess of a receiver with a plastic sealing material, setting a forming die on the receiver, accommodating the photovoltaic devices in bowl-shaped recesses of the forming die respectively, pressing the photovoltaic devices accommodated in the bow-shaped recesses from above so that lower portions of the photovoltaic devices are fitted into the through holes of the bowl-shaped recesses thereby to be thrust inside the plastic sealing material substantially by a predetermined amount, respectively, pouring a liquid phase of the transparent resin into the forming cavity of the forming die, hardening the liquid resin in the forming cavity of the forming die so that the photovoltaic devices are integrated by the transparent resin into a photovoltaic panel, and taking the photovoltaic panel out of the forming cavity of the forming die.
摘要:
A method of fabricating a photovoltaic panel is disclosed which is formed by arranging a number of granular photovoltaic devices in an array and forming the array into the shape of a panel from a transparent resin and includes each photovoltaic device having a part protruding from the resin. The method includes filling an escape recess of a receiver with a plastic sealing material, setting a forming die on the receiver, accommodating the photovoltaic devices in bowl-shaped recesses of the forming die respectively, pressing the photovoltaic devices accommodated in the bow-shaped recesses from above so that lower portions of the photovoltaic devices are fitted into the through holes of the bowl-shaped recesses thereby to be thrust inside the plastic sealing material substantially by a predetermined amount, respectively, pouring a liquid phase of the transparent resin into the forming cavity of the forming die, hardening the liquid resin in the forming cavity of the forming die so that the photovoltaic devices are integrated by the transparent resin into a photovoltaic panel, and taking the photovoltaic panel out of the forming cavity of the forming die.
摘要:
An output voltage regulator for an engine-driven generator that can satisfactory suppress fluctuation in output voltage, even when an output waveform of the generator is distorted. An engine revolution period that represents a period of output voltage is detected by use of an ignition signal. Data that represents an output waveform is obtained by squaring and adding up an instantaneous value of the output voltage for one period of engine revolution. Furthermore, a square root of the data is extracted as an effective value. An operation duty of a transistor Q1 provided in an output circuit of an excitation winding L2 that supplies a field current “if” is determined based on a difference between the effective value and a target voltage. The field current “if” changes according to the difference, and the output voltage is thereby regulated according to a load.
摘要:
An output voltage regulator for an engine-driven generator that can satisfactory suppress fluctuation in output voltage, even when an output waveform of the generator is distorted. An engine revolution period that represents a period of output voltage is detected by use of an ignition signal. Data that represents an output waveform is obtained by squaring and adding up an instantaneous value of the output voltage for one period of engine revolution. Furthermore, a square root of the data is extracted as an effective value. An operation duty of a transistor Q1 provided in an output circuit of an excitation winding L2 that supplies a field current “if” is determined based on a difference between the effective value and a target voltage. The field current “if” changes according to the difference, and the output voltage is thereby regulated according to a load.
摘要:
A system of mounting a plurality of electric components on a circuit substrate and thereby producing an electric circuit including a system for performing the following steps of taking, immediately before each of the electric components is mounted on the circuit substrate, a first image of a first portion of the circuit substrate on which the each electric component is to be mounted and a second portion of the circuit substrate that is adjacent to the first portion, mounting the each electric component on the circuit substrate, taking, immediately after the each electric component is mounted on the circuit substrate, a second image of the mounted electric component, and inspecting, by comparing the first and second images with each other, a state in which the each electric component is mounted on the circuit substrate.
摘要:
A power unit is provided which can perform stable feedback control by reducing a feedback gain, and sufficiently cope with fluctuations in the output voltage occurring according to fluctuations in the input voltage caused by fluctuations in the rotational speed of an engine. A pair of variable control bridge circuits are connected to three-phase output windings of a three-phase generator driven by the engine, and connected in an antiparallel manner to each other to form a cycloconverter for generating a single-phase alternating current to be supplied to a load. An effective voltage value-detecting circuits detects an effective value of a voltage of the alternating current. A reference effective voltage value-generating circuit generates a reference effective voltage for controlling the single-phase alternating current. A target wave-forming circuit forms a target wave for making the effective value of the voltage closer to a value of the reference effective voltage. A firing angle control device performs switching control of the variable control bridge circuits, based on the target wave, such that the variable control bridge circuits are alternately switched to operate every half a repetition period of the alternating current. A rotational fluctuation-detecting circuit detects fluctuations in a rotational speed of the engine in a rotation cycle thereof. A gain-adjusting circuit generates a reverse characteristic signal having a characteristic reverse to a characteristic of the fluctuations in the rotational speed of the engine. A comparator corrects amplitude of the target wave based on the reverse characteristic signal.
摘要:
An apparatus for positioning each of a plurality of electronic component holder heads each for holding an electronic component, at a selected one of a plurality of positions of at least one stop station, including a plurality of rotary members each of which is rotatable about a common axis line and is stoppable at the at least one stop station, the electronic component holder heads being carried by the rotary members, respectively, such that each of the holder heads is movable relative to a corresponding one of the rotary members in a direction parallel to the common axis line, and (a) a circumferential position selecting device which selects, for the stop station, one of a plurality of circumferential positions which are spaced from each other in a direction of rotation of the rotary members about the common axis line, so that at least one of the rotary members is stopped at the selected circumferential position and accordingly the electronic component holder head carried by the one rotary member is positioned at the selected one position, and/or (b) an axial position selecting device which selects, for the stop station, one of a plurality of axial positions which are spaced from each other in the direction parallel to the common axis line, so that at least one of the head holders is positioned at the selected axial position as the selected one position.
摘要:
A circuit-component feeder, including an endless belt having an outer surface a portion of which provides a component-carry surface, a stopper disposed adjacent to the component-carry surface, a component lining-up device which lines up, on the component-carry surface, a plurality of circuit components in a lengthwise direction of the component-carry surface such that the lined-up components are close to each other, and a belt driving device which circulates the belt in one of opposite directions thereof by a first predetermined amount sufficient for a leading one of the lined-up components to be moved and stopped by the stopper, and subsequently circulates the belt in the other direction thereof by a second predetermined amount smaller than the first predetermined amount.
摘要:
An apparatus for transferring a circuit component is presented that includes a plurality of component holders each of which includes an axial portion and a component holding portion which is provided at a lower end of the axial portion and which holds a circuit component, a rotatable body which is rotatable about an axis line thereof and which has, at respective equal distances from the axis line, a plurality of holding holes in which the respective axial portions of the component holders are fitted, respectively, such that each of the component holders is rotatable about an axis line thereof and is movable in an axial direction thereof, a drive gear which is concentric with the rotatable body and which is rotated by a desired angle by a drive source, a plurality of driven gears which are fixed to the component holders, respectively, such that each of the driven gears is concentric with a corresponding one of the component holders, the each driven gear being meshed with the drive gear, and an elevating and lowering device which elevates and lowers the component holding portion oft he each component holder, by moving the each component holder in the axial direction thereof, the meshing of the driven gear fixed to the each component holder with the drive gear being maintained while the elevating and lowering device moves the each component holder in the axial direction thereof.