摘要:
An optical module comprises a substrate (2), formed with wiring patterns for electrical signals and having a mounting surface (2b) mounted with one or more semiconductor optical elements (4), and a package (7, 8) in which the substrate (2) is located. The substrate (2) is formed with at least one first positioning section (2c), the package (7) is formed of a synthetic resin and includes a disposition section (7e) in which one or more optical waveguide components are opposed to the semiconductor optical elements (4), and a second positioning section (7g) adapted to engage the first positioning section, thereby positioning the semiconductor optical elements and the disposition section.
摘要:
An N-phase electric machine, N being an integer ≥3, includes a housing; i×N stator windings arranged in a fixed manner in the housing, i being an integer ≥2; and a rotatable rotor surrounded by the i×N stator windings in the housing. The stator windings are consecutively divided into i subgroups in a circumferential direction, each subgroup having N stator windings. The electric machine further comprises i current control modules and i temperature measurement devices, each current control module being correspondingly electrically connected to the N stator windings in one corresponding subgroup, so that when the stator windings in the i subgroups are supplied with power by the i current control modules, a rotating magnetic field is generated around the rotor. Each temperature measurement device is configured to measure the temperature of one corresponding subgroup in the i subgroups during operation of the electric machine.
摘要:
Disclosed is a method of producing an insulated electric wire, in which a primary coating layer including at least an enamel-baking layer is formed on a metallic conductor to form a primary coated electric wire, and a secondary coating layer is extrusion-formed on the primary coating layer of the primary coated electric wire. The method includes an electric wire pre-heating process where a surface of the primary coating layer is pre-heated using an electric wire pre-heating unit, and a resin extrusion process where a secondary coating layer is extrusion-formed on the pre-heated primary coating layer using a resin extrusion unit. Further disclosed is an apparatus for producing an insulated electric wire.
摘要:
In a method of fabricating a semiconductor device having a MISFET of trench gate structure, a trench is formed from a major surface of a semiconductor layer of first conductivity type which serves as a drain region, in a depth direction of the semiconductor layer, a gate insulating film including a thermal oxide film and a deposited film is formed over the internal surface of the trench, and after a gate electrode has been formed in the trench, impurities are introduced into the semiconductor substrate of first conductivity type to form a semiconductor region of second conductivity type which serves as a channel forming region, and impurities are introduced into the semiconductor region of second conductivity type to form the semiconductor region of first conductivity type which serves as a source region.
摘要:
A manufacturing apparatus for multi-fiber optical ferrule includes a spacer whose hardness is equivalent to or higher than the hardness of pins for forming fiber holes. Further, corner portions with respect to the arrangement direction of the pins for forming fiber holes of the spacer are formed as inclined surfaces or rounded surfaces.
摘要:
An optical waveguide chip assembly in which a plurality of optical waveguide patterns and two positioning grooves are laterally arranged is prepared by forming a plurality of optical waveguide patterns and two positioning grooves on a wafer in parallel to each other and cutting the wafer. Separately from this, an optical fiber array assembly having a plurality of optical fiber array cables and two guide pin holes is prepared. The optical waveguide chip assembly and the optical fiber array assembly are joined while aligning by the guide pins and then divided into units of individual optical waveguide modules. A large number of optical waveguide modules can be made with a good efficiency, and the mass productivity is improved. Since a plurality of optical waveguide modules are made by the same positioning, variations among products can be reduced.
摘要:
An optical fiber end portion (10) which has a ferrule (11) which comprises a butting end face (11e) opposed to or butted against an optical device (20), and a single fiber hole or a plurality of fiber holes formed in parallel at predetermined intervals, into which one end of optical fiber (13a) is inserted, the optical fiber being optically connected to said optical device, a method for manufacturing the optical fiber end portion, and a construction for connecting the end portion to the optical device. The ferrule is formed of a molded product of synthetic resin, and is provided with at least one connecting member (12) on the side of butting end face connected to the optical device. The connecting member (12) has a linear expansion coefficient set at a value smaller than the linear expansion coefficient of a synthetic resin forming the ferrule.
摘要:
A method of molding a ferrule of plastic resin provided with at least one hole having a small diameter and positioned at a predetermined position by a mold having a pair of associated molding ferrule halves, including the steps of arranging a molding core having at least one pin for defining the hole in a cavity defined by the pair of molding ferrule halves, holding the molding ferrule halves by a clamping force, the molding ferrule halves having inner members for positioning the pin and being free from the clamping force, supplying plastic resin into said cavity and pressing the inner members of the molding ferrule halves by a force separate from the mold clamping force.
摘要:
A torque variation in an internal combustion engine due to the combustion variations is detected at each predetermined period. An average torque variation to be compared with the detected torque variation is predetermined experimentally based on the engine speed and the intake manifold pressure and is stored in a memory. The number of the detected torque variations which exceed the average torque variation multiplied by a predetermined constant is counted, and if the ratio of the counted number to the total number of the detected torque variations is larger than a predetermined reference value, then the presence of a torque variation is determined.
摘要:
Disclosed is a method of producing an insulated electric wire, in which a primary coating layer including at least an enamel-baking layer is formed on a metallic conductor to form a primary coated electric wire, and a secondary coating layer is extrusion-formed on the primary coating layer of the primary coated electric wire. The method includes an electric wire pre-heating process where a surface of the primary coating layer is pre-heated using an electric wire pre-heating unit, and a resin extrusion process where a secondary coating layer is extrusion-formed on the pre-heated primary coating layer using a resin extrusion unit. Further disclosed is an apparatus for producing an insulated electric wire.