摘要:
A connection structure for connecting a plurality of semiconductor switches in parallel includes a pressed contact for a semiconductor switch. The pressed contact includes a layered structure which connects a drain conductor to a plurality of drain electrodes, a source conductor to a plurality of source electrodes, a gate conductor to a plurality of gate electrodes, and an insulating film between the gate conductor and the source conductor. The gate electrodes are a plurality of resilient elastic wings which are pressed upward against the gate conductor, thereby ensuring a good electrical connection.
摘要:
An inverter unit of the invention converts a DC current to a high frequency AC current. The inverter unit is formed of a metal conductor base plate connected to a positive terminal of a DC power supply; and switching elements arranged on both surfaces of the base plate. Each switching element situated on each surface of the base plate includes an upper arm and a lower arm of the inverter unit to form an arm pair. The arm pairs formed on both surfaces of the base plate constitute a single phase bridge circuit.
摘要:
In a conductive contact structure for two conductors, a lower electrode also serves as a cooling element, and two grooves are formed in the lower surface of an electrode. A grease-like insulating material high in thermal conductivity is applied to the lower surface of the electrode except the middle region thereof which is defined by the two grooves; that is, it is applied only to the right and left regions of the lower surface which are located on both sides of the middle region. A pressurizing force is applied through an upper conductor to an electrode whose lower surface is fixed through an insulating board to the upper surface of the electrode. The middle region of the lower surface of the electrode is in contact with the surface of the lower conductor, and the right and left regions are elastically deformed in such a manner that they are slightly raised above the surface of the lower conductor, thus forming spaces therebetween. The spaces thus formed are filled with the insulating material. Thermal conduction; i.e., heat radiation is effected through the right and left regions to which the insulating material have been applied, and electrical conduction is ensured through the middle region to which the insulating material is not applied.
摘要:
An angle sensor can be re-mounted properly. This angle sensor includes a detecting sensor that detects a turned volume of a rotary shaft, and a governor connected to the detecting sensor. The governor includes a comparator that compares a turned angle data obtained before the angle sensor is detached with a turned angle data obtained after the angle sensor is re-mounted. This angle sensor produces a remarkable advantage when it is used in cars which are governed using the data about a turned volume of the steering wheel or the shaft.
摘要:
A coil sheet has an insulative substrate which bends and has the first surface and the second surface on the opposite side of the first surface, a first conductor forming a first spiral conductive pattern and formed on the first surface of the insulative substrate, and a second conductor forming a second spiral conductive pattern and formed on the second surface of the insulative substrate. The width of the tip portion of the second conductor of the second spiral conductive pattern is set narrower than the width of the base end portion of the first conductor of the first spiral conductive pattern.
摘要:
Problems on catalyst production and catalyst performance with respect to conventional 8-oxygen-membered ring micropore-containing crystalline silicoaluminophosphate molecular sieves as non-equilibrium methylamine synthesis catalysts, are resolved. A chabazite type crystalline silicoaluminophosphate molecular sieve having high purity and high crystallinity and having, on a crystal grain surface, an amorphous oxide layer whose Si/Al atomic ratio is greater than that of the whole crystal grain can be stably produced with high yield with the use of a small amount of structure directing agents by the present method characterized in that hydrothermal treatment conducted in the production of 8-oxygen-membered ring micropore-containing crystalline silicoaluminophosphate sieves is controlled under specified treating conditions. The thickness and composition of the amorphous oxide layer, which exert marked influence on the yield of dimethylamine synthesis, can be easily controlled and reproduced under the conditions of catalyst synthesis according to the invention. Thus, the catalyst of high performance can be stably supplied by the present invention at a low cost with reduced output of waste.
摘要:
The photovoltaic device is provided with a photovoltaic element on the surface of a substrate, and a light diffuse transmission filter, which diffuses light passing through it, over the surface of the photovoltaic element. The light diffuse transmission filter is separated from the surface of the photovoltaic element via spacers or via a light transmitting gap layer.
摘要:
A control system for a transistor inverter comprising a circuit for detecting the load current or the output voltage from the inverter to produce a detection output; a circuit for outputting a control instruction for adjusting the load current; a leading angle forming circuit for combining the detection output with the control instruction to form a control signal corresponding to a leading angle at which the inverter output voltage is controlled with a leading phase relative to the load current; and a circuit receiving the control signal from the leading angle forming circuit and for forming a switching control signal, which is supplied to the switching devices in the inverter. The load current is not controlled directly by controlling the frequency of the inverter, but by changing the phase difference .gamma. between the load current and the inverter output voltage.
摘要:
A rotation angle detector provided with a spring to thrust a rotary body against protrusions formed on an inner wall of an opening via a detector body in a manner to keep the rotary body rotatable without any play in a linked motion with a steering shaft. As a result, the detector can detect rotation angles of the steering shaft with high accuracy.
摘要:
A rotation angle detector includes a rotor, first and second detecting elements which rotate according to a rotation of the rotor, first and second detecting units for detecting rotations of the first and second detecting elements, respectively, and a control unit for detecting a rotation angle of the rotor based on a first signal when a difference between the first and second signals output from the first and second detecting units ranges within a predetermined range. The rotation angle detector has a simple structure and detects the rotation angle of the rotor accurately