34results about How to "Reduce contact voltage" patented technology

The invention discloses a method for growing an ultraviolet LED epitaxy structure. A new structural layer and a new surface contact layer are adopted for being doped, light can be prevented from being absorbed through surface materials when ultraviolet light is grown, and contact voltage can be further lowered. According to the method, a traditional magnesium-doped p-type GaN surface contact layer is replaced by the silane-doped n++-type AlzInwGa1-z-wN surface contact layer, the w is larger than 0 and smaller than 0.05, the z is larger than 0 and smaller than 0.9, absorption of GaN materials of the surface contact layer to the ultraviolet light is reduced, and the light emitting efficiency of an epitaxial wafer is improved; meanwhile, low-In-component n++-type AlzInwGa1-z-wN can be in good contact with an ITO current expanding layer of a chip manufacturing technology, heavy doping of n-type silane can be further easily achieved, good ohmic contact with the ITO layer can be formed, and the contact voltage can be reduced.

The invention discloses a low-capacitance high-speed transmission semiconductor surge protection device. The PN (P-type/N-type) junction is a flat PN junction equilibrium junction. Transmitting areas of the semiconductor surge protection device are filled for two times; the thickness of the P-area is increased by 10-20%; the thickness of the N-area is reduced by 10-20%; the N+substrate is a silicon wafer of which the two sides are polished; the thickness of the wafer ranges from 200-300 micrometers; and the resistivity is 20-22%. By adopting a flat PN junction equilibrium junction structure, the density distribution of the current is improved; by adopting the technology of increasing the thickness of the P-area, filling the transmitting area for two times, adopting a field plate and the like, a reverse breakdown voltage of a control tube EB (electron beam) is increased, and the contradiction between the reverse breakdown voltage of an EB junction and beta is solved; through the control to the beta of NPN (N-P-N type) of a quadruple structure thyristor, the problem of controlling the maintaining current and the breakover current is solved; and by decreasing the contact voltage and thinning the N-area, the minor carrier lifetime is increased.

A microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device relates to the technical field of arc extinguishing and harmonic eliminating of an electric power system. The microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device comprises a high-voltage current-limiting fuse, a voltage transformer, a three-phase combined type overvoltage protector, a vacuum contactor, a microcomputer arc-extinguishing controller, a high-voltage fuse and a zero-sequence current transformer, wherein three-phase ports of the three-phase combined type overvoltage protector are connected with a three-phase high-voltage isolation switch; a grounding terminal of the three-phase combined type overvoltage protector is connected with the voltage transformer and then grounded; the high-voltage fuse is connected in series between three-phase ports of the voltage transformer and the three-phase high-voltage isolation switch; a voltage transformer control terminal of the microcomputer arc-extinguishing controller is connected with the voltage transformer; a vacuum contactor control terminal of the microcomputer arc-extinguishing controller is connected with the vacuum contactor; three-phase ports of the high-voltage current-limiting fuse are respectively connected with the three-phase high-voltage isolation switch, while the other ends of the high-voltage current-limiting fuse are connected with the vacuum contactor; a grounding terminal of the vacuum contactor is grounded; and the zero-sequence current transformer is arranged between the grounding terminal of the vacuum contactor and a grounding point. The overvoltage-protecting device is high in action speed and capable of arc-extinguishing and harmonic-eliminating.

A microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device relates to the technical field of arc extinguishing and harmonic eliminating of an electric power system. The microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device comprises a high-voltage current-limiting fuse, a voltage transformer, a three-phase combined type overvoltage protector, a vacuum contactor, a microcomputer arc-extinguishing controller, a high-voltage fuse, and a zero-sequence current transformer, wherein three-phase ports of the three-phase combined type overvoltage protector are respectively connected with a three-phase high-voltage isolation switch; a grounding terminal of the three-phase combined type overvoltage protector is connected with the voltage transformer and then grounded; the high-voltage fuse is connected in series between three-phase ports of the voltage transformer and the three-phase high-voltage isolation switch; a voltage transformer control terminal of the microcomputer arc-extinguishing controller is connected with the voltage transformer; a vacuum contactor control terminal of the microcomputer arc-extinguishing controller is connected with the vacuum contactor; three-phase ports of the high-voltage current-limiting fuse are respectively connected with the three-phase high-voltage isolation switch, while the other ends of the high-voltage current-limiting fuse are connected with the vacuum contactor; a grounding terminal of the vacuum contactor is grounded; and the zero-sequence current transformer is arranged between the grounding terminal of the vacuum contactor and a grounding point. The overvoltage-protecting device is high in action speed and capable of arc-extinguishing and harmonic-eliminating.

The invention relates to a microcomputer arc harmonic elimination and overvoltage protection device and belongs to the arc harmonic elimination field of an electrical power system. The protection device comprises a high voltage current limit fuse, a voltage transformer, a three-phase combined overvoltage protection device, a vacuum contactor, a microcomputer arc elimination controller, a high voltage fuse and a zero sequence current transformer, wherein three-phase ports of the three-phase combined overvoltage protection device are respectively connected with a three-phase high voltage isolation switch, a ground end is connected with the voltage transformer and is then in ground connection, the high voltage fuse is connected between three-phase ports of the voltage transformer and the three-phase high voltage isolation switch, a voltage transformer control end of the microcomputer arc elimination controller is connected with the voltage transformer, a vacuum contactor control end is connected with the vacuum contactor, three-phase ports of the high voltage current limit fuse are respectively connected with the three-phase high voltage isolation switch, the other end is connected with the vacuum contactor, a ground end of the vacuum contact is in ground connection, and the zero sequence current transformer is arranged between the ground end and a ground point. The protection device is advantaged in that the motion speed is fast, and arc harmonic elimination effects can be realized.

The invention relates to the field of electrolytic powder processing, in particular to a connector for electrolytic powder processing, an electrolytic powder processing device and a manufacturing method. The connector comprises a flexible conductive body, a first fixing end and a second fixing end, wherein the first fixing end is used for connecting the flexible conductive body with a conductive busbar of the electrolytic powder processing device; and the second fixing end is used for connecting the flexible conductive body with a polar plate of the electrolytic powder processing device. The polar plate and the conductive busbar are connected together by using the connector comprising the flexible conductive body and a fixing piece. The mounting is simple and convenient, the contact is good, the contact voltage can be reduced by 20-95%, and the energy consumption of electrolysis can be reduced by 1-10%. The electrolytic powder processing device is suitable for all electrolytic powder processing and electrolytic refining.

The invention relates to the field of a lightning-protection grounding geographic pole and particularly relates to a graphite lightning-protection grounding module and a preparation method thereof. The graphite lightning-protection grounding module is made from graphite powder, granular graphite and asphalt. The preparation method comprises the steps of material preparing, kneading, blank preparing, roasting, post processing, and the like. The graphite lightning-protection grounding module disclosed by the invention is low in electrical resistivity, relatively high in mechanical strength, resistant to corrosion and long in service life.

The invention discloses an arc extinction, harmonic elimination and overvoltage protection device of a microcomputer, and relates to the technical field of arc extinction and harmonic elimination of a power system. The arc extinction, harmonic elimination and overvoltage protection device comprises high-voltage current-limiting fuses, a voltage transformer, a three-phase combined overvoltage protector, vacuum contactors, a microcomputer arc extinction controller, high-voltage fuses and a zero sequence current transformer, wherein three phase ports of the three-phase combined overvoltage protector are separately connected with three phase high-voltage isolation switches, a ground end is connected with the voltage transformer and then is grounded, the high-voltage fuses are connected in series between three phase ports of the voltage transformer and the three phase high-voltage isolation switches, a voltage transformer control end of the microcomputer arc extinction controller is connected with the voltage transformer, vacuum contactor control ends are connected with the vacuum contactors, the three phase ports of the high-voltage current-limiting fuses are separately connected with the three phase high-voltage isolation switches, the other ends of the high-voltage current-limiting fuses are connected with the vacuum contactors, vacuum contactor ground ends are grounded, and the zero sequence current transformer is arranged between the ground end and a ground point. The overvoltage protection device has the advantages of fast action speed and can be used for arc extinction and harmonic elimination.

Electric resistance stone materials and a method for manufacturing the same are provided to reduce a step voltage and a contact voltage and to maintain high electric resistance for a long period of time by securing water repellent characteristic and non-repairing characteristic based on a silicon water repellent layer. A method for manufacturing electric resistance stone materials(1) includes the following: A composition containing (A) components and (B) components is prepared. The composition is attached to the surface of dry natural stone(2) of 5-50mm diameters. A heat treating process is implemented at a temperature between 50 and 250 degrees Celsius. The (A) components are organopolysiloxane containing at least three Si-H bonds in one molecule, and the (B) components are platinum catalysts.

A trigger switch comprises a moving contact, a pre-closing contact, a fixed contact, a fixed contact binding post, an elastic insulation support, a capacitor A side lead, a capacitor, a capacitor B side lead, a moving contact binding post, a moving contact shell hinged hole, a hinged support, a button, a button insulation connecting rod, a button connecting rod movable hole, a shell, a spring, a button connecting rod hinged hole, a moving contact connecting body, a moving contact middle hinged hole, a load, a lead from a power source to the moving contact binding post, a lead from the fixed contact binding post to a load B side, a lead from the load A side to the power source, a power source A binding post and a power source B binding post. According to the trigger switch, on the basis of the capacitor capacitive reactance formula that Xc=1/2 pi fc, by means of the voltage reduction current limitation principle of the capacitor, the contact voltage of the contacts is lowered fundamentally, so that the contact electric spark strength is lowered, and contact points are protected.