36results about How to "High rated voltage" patented technology

A boost converter for high power and high output voltage applications includes a low voltage controller integrated circuit and a high voltage, vertical, discrete field effect transistor, both of which are packed in a single package.

The full-scale fuse element assembly includes an insulative bobbin having opposing first and second ends and a conductive connector coupled to the ends of the bobbin. A plurality of fuse elements extend around the insulating bobbin between the first connector and the second connector, and each fuse element includes a weak current interrupting fuse element portion extending from the first connector and a fuse element portion extending from the second connector. The part of the high current limiting fuse element that extends from the connector. An insulating bushing surrounds each part of the fuse element that interrupts the weak current, and each bushing includes an end portion adjacent to the high-current limiting fuse element. Each weak current interrupting fuse element portion includes a weak melting point adjacent the second end of the respective bushing.

A transient voltage collapse circuit provides a reference voltage for an SRAM (static random access memory). The SRAM receives a first reference voltage and a second reference voltage higher than the first reference voltage. The transient voltage collapse circuit provides the first reference voltage to the SRAM via a voltage supply line. The transient voltage collapse circuit maintains the voltage supply line at a first voltage level during a power save mode of the SRAM. The transient voltage collapse circuit increases the voltage of the voltage supply line during a write operation of the SRAM. The increase in the voltage of the supply line reduces the gap between first reference voltage and the second reference voltage, thereby assisting with the write operation of the SRAM.

An electric double layer capacitor is composed of a pair of current collectors, a positive polarizable electrode provided on one of the pair of current collectors, a negative polarizable electrode provided on the other of the pair of current collectors, a separator between the positive and negative polarizable electrodes, and an organic electrolytic solution which impregnates at least the positive and negative polarizable electrodes and the separator. The capacitor has a theoretical amount of ions Q_t defined as

Q_t (moles)=C×V÷96,500,

wherein C is the rated capacitance (farads) of the capacitor and V is the rated voltage (volts), and an amount of ions Q_e in the organic electrolytic solution, such that Q_e/Q_t=1.7 to 3.5. The capacitor has a high voltage rating, excellent cycle characteristics during high-current charging and discharging, and a low internal resistance in low-temperature environments.

Disclosed in the invention is a method for manufacturing a high-voltage solid tantalum capacitor dielectric oxide film. An anode tantalum block that has been sintered and molded is immersed into a 10% to 50% of ethylene glycol solution and a dielectric oxide film is formed at the anode tantalum block by using an electrochemical oxidation way; the anode tantalum block is immersed into an organic solvent like benzene, dichlorobenzene, trichloro-benzenes, toluene, xylene, and propylene carbonate and the like for 10 to 20 seconds and then is taken out, wherein the organic solvent has a high boiling point that is over 100 DEG C and low viscosity and is insoluble in water; and after the residual solvent at the surface of the anode tantalum block is cleaned, the anode tantalum block is immersed into a 10% to 50% of ethylene glycol solution again and secondary forming is carried out by applying a voltage that is 10V to 50V higher than the voltage of the primary forming. After the primary and secondary forming, the dielectric oxide films with different thickness are formed at the inside and the surface of the anode tantalum bloc. On the premise that the volume is not reduced, the product forming voltage is improved, thereby improving the voltage-withstanding value of the product.

This invention relates to new type of safe fuse and its process method, which forms Monolithic structure by more than three layers of glass to ceramics layer and the metal film on each layer with two end prove on the conductive layer with inner metal film conducted. The method to process the fuse comprises the following steps: covering one layer of metal film on glass to ceramics layer; then covering one layer of ceramics layer and repeating the above steps to get the designed layer number to get the crude film slice of the monolithic structure; then cutting the film slice into single fuse to burst into ceramics and finally sealing and coating.

The invention discloses a high-voltage direct current gas breaker which can cut off fault currents under high nominal voltage classes. The high-voltage direct current gas breaker comprises a superconducting current limiter and a hydrogen breaker which are connected in series. The working principle is that the fault currents are limited by the superconducting current limiter first and then are cut off by the hydrogen breaker, so that the purpose of cutting of the fault currents is achieved. The high-voltage direct current gas breaker has advantages of being fast in response speed, low in current overload coefficient, simple in structure, small in size, low in overvoltage, safe and reliable, the short circuit current value of a circuit cannot exceed the quench current value of the superconducting current limiter, and other equipment can be protected.

The invention provides an electrode material and a preparation method thereof, and an aluminum electrolytic capacitor. The electrode material comprises an electrode foil, and a surfactant layer, a polymer layer A, a polymer layer B and a polymer layer C which are attached onto the electrode foil in order, wherein the polymer layer C is the outermost layer far away from the electrode foil; the polymer layer A is obtained by reacting monomers under the action of an oxidant and a catalyst, and the polymer layer B is mainly obtained by mixing and drying one or more of LV, LVN and LVNS; the polymerlayer C comprises a polymer layer C1 and a polymer layer C2 which are sequentially alternated, wherein the polymer layer C1 is mainly obtained by mixing and drying one or more than one of W5, W5N, W8and W8N, and the polymer layer C2 is mainly obtained by mixing and drying one or more than one of KV2 and KV2N. According to the invention, the electrode foil is attached with multiple layers of materials, so that the electric properties such as rated voltage (more than or equal to 10V), capacitance and the like of the product are improved.

The invention relates to the technical field of medical treatment auxiliary equipment, in particular to an automatic pressing device of an artificial respiration air bag. The automatic pressing device comprises an installation plate, wherein the right side of the bottom of the installation plate is provided with a driver; on the bottom of the installation plate, the left side of the driver is provided with a controller; on the bottom of the installation plate, the left side of the controller is provided with a lithium battery; the middle of the left side of the base surface of the installation plate is provided with a stepping motor; on the base surface of the installation plate, the left side of the stepping motor is provided with an installation division plate; the end part of the left side of the installation plate is provided with a bottom fixing plate; the middle of the left side of the installation division plate is provided with a coupling; the edge of the base surface of the bottom fixing plate is provided with a side surface fixing plate; the left side of the side surface fixing plate is symmetrically provided with gear shafts; and the left side of each gear shaft is symmetrically provided with swinging arms. The whole equipment can be conveniently carried, is simple in operation, has rich functions, has high stability and practicability and has a certain popularization value.

The invention discloses a 1500V cable of a charging pine of a new energy electric automobile. The cable comprises a cable core. A waterproof tape isolation layer is extruded out of the cable core. A jacket made of a 125 degrees centigrade anti-flaming thermoplastic elastomer is extruded out of the outmost layer of the cable. The cable core is composed of a Kevlar tensile rope arranged at a center, four power wires arranged around the Kevlar tensile rope, a ground wire, and detection signal wires which are symmetrically arranged at two sides of the ground wire. According to the cable, the rated voltage of the new energy source electric automobile charging cable is improved; moreover, the flexibility of the cable is ensured; through selection of a nylon insulation inner sheath, the insulation resistance among the voltage wires is improved, and the leakage current is reduced; moreover, through addition of the waterproof tape, the water vapour in the air is prevented from permeating into the cable; the new energy source electric automobile charging voltage is increased; the new energy source electric automobile charging time is shortened; the usage frequency is improved; and the usage inconvenience resulting from the long charging time is reduced.

The invention relates to a semiconductor device, including: a first conductive type semiconductor substrate; a grid; a second conductive type source and leaking diffused layer formed on the substrate at two corresponding sides of the grid; a second conductive type low concentration diffused layer, a second conductive type moderate concentration diffusion layer is further formed in the low concentration diffused layer as a relaxation layer of electric field in the semiconductor device of the invention.

The invention discloses a third harmonic injection method and device suitable for current converter circulation control. The method comprises the following steps: acquiring the amplitude and phase of a power frequency modulation wave of a current converter and the amplitude and phase angle of a second harmonic modulation voltage introduced by the current converter circulation control; and determining the amplitude and the phase of the third harmonic injection voltage when the maximum value of the positive peak value and the negative peak value of the alternating current modulation wave of the converter is minimum according to the relationship between the amplitude and the phase angle of the second harmonic modulation voltage introduced by the circulating current control of the converter and the amplitude and the phase of the power frequency modulation wave of the converter. According to the invention, the consistency of the positive and negative peak values of the modulation wave of the converter can be improved, so that the rated voltage of the transformer valve side of the converter can be further improved, the converter valve and related current are reduced, and the system loss is reduced.

The invention discloses a surface-mounted thick film fuse structure and a manufacturing method thereof, and belongs to the field of electronic components. Comprising a substrate, a back electrode, a surface electrode, a heat insulation layer, a fuse link layer, an encapsulation layer, an end electrode, a fuse link body, a fuse wire isolation through hole and a fuse wire, the substrate is made of a high-temperature-resistant insulating material, the back electrodes are located at the two ends of the back face of the substrate, the surface electrodes are located at the two ends of the surface of the substrate, the heat insulation layer is located on the surface of the substrate, the fuse-link layer is located on the surface of the heat insulation layer, the encapsulation layer is located on the surface of the fuse-link layer, and the end electrodes cover the back electrodes, the surface electrodes and the two ends of the substrate. The fuse isolation through holes penetrate through the fuse link body, the shape, the number, the size and the arrangement mode of the isolation through holes are set according to the specific performance of the fuse, and the fuse is manufactured by adopting a thick film integrated process technology. The problem of contradiction between rated voltage improvement and electric arc reduction in the prior art is solved. The fuse is widely applied to the field of miniaturized, high-working-voltage, low-arc and high-reliability fuses.

A dry-type self-healing high-voltage capacitor element includes a reel cell comprising of metallized capacitor and aluminium-foil capacitor, a sprayed golden layer and electrode wire connected in series with inner-fuse put in the element and is put in a casing filled with resin between them. The metallized capacitor has the metal film multiple-series stracture, and the said inner-fuse is surrounded with the quartz sand. The element features that low wastage, long service life and while voltage breakdown it can reliably extinguish arc and fast run down.

The invention is related to an on-load tap-changer (10, 40, 60, 80) for dry transformers, comprising an electric insulating hollow casing (12, 62) extending around a virtual axis (14, 70), wherein several electric contact sections (16, 18, 20, 22) are foreseen along a path on the inner surface of the hollow casing (12, 62), which are electrically joined through the wall of the hollow casing (12, 62) and a selector contact in the inner of the cylinder which is moveable along the path and that's outer end is selectively connectable with one of the contact sections by a respective movement. Respective cables (32, 42, 68) are foreseen to electrically connect the contact sections (16, 18, 20, 22) from the radial outer side of the hollow casing (12, 62), wherein at least some of the cables (32, 42, 68) comprise a respective surrounding outer insulation (34, 44) at least at their respective connected end.

This invention relates to a new type of slice voltage-sensitive resistors and a manufacturing method, in which, the resistor is composed of a glass-ceramic material layer, a voltage-sensitive resistor film and end-electrodes covering on both ends, the glass-ceramic material layer includes three or more layers adhered with a voltage-sensitive resistor film on each layer to comprise a monolithic structure, and the parallel arrayed voltage-sensitive resistor films in it are conducted to the end electrodes. The manufacturing method includes: preparing a glass-ceramic material layer as the base layer, adhering a layer of voltage-sensitive resistor film on the base layer, covering a layer of backings and repeating the above mentioned operations till getting the designed layers and raw membranes to be cut to voltage-sensitive resistors and sintered and sealing the end electrodes and plating it. Advantage: rated voltage and rated current are increased with consistency of resistance value and durability of solvent.

A switch for a medium or high voltage traction line testing device includes a plurality of normally-opened pairs of contacts connected in series, wherein each pair of contacts is equipped with a separate control coil. The switch further comprises a wireless power transfer supply module being on ground potential for supplying cascaded wireless power transfer receivers comprising the transmitting coil, high frequency inverter and microcontroller, a plurality of cascaded wireless power transfer receivers for supplying control coil of pairs of contacts. Each of the wireless power transfer receivers is referenced to the floating potential and comprises a receiving coil. Each of the control coils is connected to one of the wireless power transfer receivers. The receiving coils of the wireless power transfer receivers are magnetically coupled, and a wireless power transfer supply module is located in the middle of the cascaded wireless power transfer receivers.