52results about How to "High current" patented technology

A temperature control device includes a temperature detector, a difference operation unit, a controller, a saturation processing circuit unit, a rewritable storage unit, and a conversion unit. The difference operation unit operates a digital value corresponding to a difference value between a detected temperature value and a target temperature. The controller calculates a manipulated variable using the digital value operated by the difference operation unit. The saturation processing circuit unit includes a digital circuit to limit an output value of the controller to a pre-set upper limit value. The rewritable storage unit stores the upper limit value read from a storage area of the rewritable storage unit and input into the saturation processing circuit unit. The conversion unit converts the output value of the saturation processing circuit unit into an analog signal to output the converted value as a control command value to the heater.

The invention discloses a braille point display device. According to the Braille point display, the shape memory alloy material is used as the lifting structure, and the lifting structure is controlled to deform under the power-on condition, so that the point display part is driven to extend or retract relative to the mounting main body. Compared with piezoelectric driving and electromagnetic driving equipment, the shape memory alloy material can adjust the deformation quantity through the power-on state, large deformation quantity can be generated through a small structural material, the size of a lifting structure does not need to be increased, the driving structure of the braille convex points is effectively simplified, the size of the equipment is reduced, and the production cost of the equipment is reduced. And meanwhile, the locking mechanism is arranged, so that the telescopic state of the point display part is kept, the situation that the lifting structure is always kept in a power-on state is avoided, and the power consumption of equipment is reduced.

The invention discloses a power semiconductor device continuous switch test circuit and method, and relates to the field of power electronics, and the test circuit comprises a current generator which is used for generating a test current; the voltage balance module is used for generating test voltage; the auxiliary module is connected with the current generator and the voltage balance module and is used for providing test voltage and test current required in a continuous switching state for the power semiconductor device T1 to be tested; the capacitor discharging module is used for controlling the magnitude of voltage connected to the two ends of the power semiconductor device T1 to be tested; wherein the voltage balance module comprises a power semiconductor device Tc2 and a capacitor C1; the power semiconductor device Tc2 controls the capacitor C1 to apply voltage to the inductor L in the auxiliary module, and the voltage at the two ends of the inductor L is balanced. According to the application, the continuous switching condition simulation of the power semiconductor device T1 to be tested is met, and voltage and current stress decoupling is realized, so that a voltage source does not need higher voltage stress, and the requirement on a power supply is reduced.

The invention discloses a P-type gallium oxide horizontal diode device structure and a preparation method thereof, and mainly solves the problems of small current and poor voltage endurance capability of the existing similar device. The device structure comprises a gallium oxide insulating substrate (1), a gallium oxide P-type layer (2), cathode metal (3) and anode metal (4). Wherein the nickel oxide P-type layer is realized by performing ion implantation and annealing activation processes on the surface of the gallium oxide insulating substrate, and compared with the existing heterogeneous material deposition process, the implantation process has no interface defect, and the voltage endurance capability of the device can be improved. As the extension performance improvement of the device structure, a nickel oxide layer (5) can be additionally arranged between the gallium oxide P-type layer and the cathode to improve the conductivity of the device, or a field plate structure (6) is additionally arranged on the anode metal to further improve the voltage endurance capability of the device. The invention has the advantages of good conductivity and strong voltage endurance capability, and can be used for high-voltage high-power circuits such as high-voltage power grids, current inverters and data center power.

The invention discloses a nonlinear time-delay regulation and control device, which solves the problem that an electric appliance is unstable when the electric appliance is connected into a circuit when the current in the circuit is nonlinear and has large fluctuation, and comprises a box body, a control panel is arranged on the front surface of the box body, and wiring terminals are symmetrically arranged on the two sides of the box body. A power connection adjusting assembly is installed in the box body and used for controlling and adjusting, a top adjusting and controlling assembly is installed at the top end of the box body and used for adjusting non-linear current, the power connection adjusting assembly comprises a transverse plate movably installed in the box body, and end contacts are symmetrically installed at the two ends of the transverse plate. A normal power connection unit is installed on the transverse plate and used for power connection adjustment. In the working process, when the arranged transverse plate is located on the lower portion, a circuit can be normally connected into an electric appliance, after the transverse plate moves upwards, the circuit can be connected into regulation and control equipment, and the circuit can be conveniently regulated and controlled.

The invention relates to an outdoor communication cabinet which comprises a cabinet body and further comprises a bearing box, a gas storage part, a gas spraying pipe and a driving part. An air storage part is installed above the bearing box, an opening in the right end of the bearing box communicates with the cabinet, and a dustproof net is fixed in the bearing box; the air storage part comprises a shell and a piston plate, an elastic cylinder is connected between the piston plate and a rear side plate of the shell, an air inlet valve is arranged on the rear side plate of the shell, a first sliding hole is formed in the top plate, on the right side of the dustproof net, of the bearing box, and the upper end of the air spraying pipe penetrates through the first sliding hole and extends into the piston plate. The elastic cylinder is communicated with the upper end of the gas ejector pipe through a one-way gas outlet valve arranged on the piston plate; the driving part comprises a connecting box and a rotating shaft, the interior of the connecting box is divided into an upper cavity and a lower cavity through a partition plate, the rotating shaft is rotationally arranged in the upper cavity, the upper portion of the rotating shaft is connected with a pull rope, and the other end of the pull rope backwards penetrates through the shell to be connected with the piston plate. According to the invention, the problem that the dustproof net of the outdoor communication cabinet for isolating dust is easily blocked by dust is solved.

The invention belongs to the technical field of optical detection, and particularly relates to a broadband self-driven photoelectric detector which sequentially comprises a metal In point electrode, a metal Pd front electrode, a PdTe2 modified Sb2O3 two-dimensional thin film layer, a Si single crystal substrate and a metal In back electrode from top to bottom. The Sb2O3 two-dimensional thin film layer prepared through modification of PdTe2 is prepared through magnetron sputtering, chemical vapor deposition and other methods. Test results show that the prepared thin film device shows good self-driven light detection performance under illumination from deep ultraviolet to infrared light, and has the advantages of stable performance and the like.

The invention discloses a transformer power-saving device for efficient power production equipment, which comprises a box body and a power supply mechanism, a cooling plate and a grid plate are arranged in the box body, the power supply mechanism is electrically connected with the cooling plate, the grid plate is arranged on the upper side of the cooling plate, the inner side wall of the box body is also fixedly connected with a permeable plate, and the permeable plate is fixedly connected with the box body. The ventilation plate is arranged on the upper portion of the box body, a space formed by the upper portion of the box body and the ventilation plate is communicated with the outside, a plurality of ventilation openings are formed in the ventilation plate, and a control device is arranged in each ventilation opening. The device has the advantages that when the temperature in the box body is low, the memory spring is in a contraction state, so that the sealing block seals the air outlet, impurities such as dust, rainwater and liquid in external air cannot enter the box body, and a good isolation effect between the box body and the outside is guaranteed; the inside of the box body is communicated with the outside, so that ventilation and heat dissipation are realized, and the temperature inside the box body is reduced.

A disconnector to reduce considerably high voltage and high frequency current generated during the service no-load opening and closing, the disconnector comprising a first main contact (10), a second main contact (20), a sliding contact (50) and an arcing horn (60) having a length (70), the disconnector having a connected state, an intermediate state and a disconnected state, wherein in the connected state a first electrical contact is established between the first main contact and the second main contact, in the intermediate state the first electrical contact is interrupted while a second electrical contact exists between the sliding contact and a contact position (160) on the length of the arcing horn, and in the disconnected state the first electrical contact and the second electrical contact are interrupted, wherein at least a part of the length of the arcing horn comprises an electrical filter (180) configured to provide a resistance and an inductance to an electrical current.

The utility model discloses a kind of welding strip stretching devices, including guide seat and multiple clamping structures, multiple clamping structures are evenly spaced clamped on welding strip, and multiple clamping structures are all slidably connected with guide seat;Multiple clamping structures are suitable for moving in the same direction under external force, and the distance of each clamping structure relative to guide seat is an arithmetic sequence.The tolerance between the adjacent two numbers in the arithmetic sequence is a constant value, that is, the distance of each clamping structure is a constant value, because multiple clamping structures are evenly spaced distributed on welding strip, so the stretching of each part on welding strip is the same, thereby realizing the uniform stretching of each part of welding strip.

The utility model discloses a display panel and a display terminal. The display panel comprises a substrate and a thin film transistor, the thin film transistor comprises an active part, a gate insulating layer and a gate electrode, and the active part comprises a main body part and an edge part; the gate insulating layer is arranged on one side of the active part and comprises a first insulating part aligned with the main body part and a second insulating part aligned with the edge part; the gate is arranged on the surface of the gate insulating layer away from one side of the active part; wherein the orthographic projection of the second insulating part on the substrate at least covers the orthographic projection of the edge part on the substrate, and the capacitance of the gate oxide layer corresponding to the second insulating part is smaller than that of the gate oxide layer corresponding to the first insulating part. The capacitance of the gate oxide layer corresponding to the second insulating part is set to be smaller than the capacitance of the gate oxide layer corresponding to the first insulating part, so that the thin film transistor corresponding to the edge part is more difficult to open, the influence of a hump effect is reduced, the current of the thin film transistor in a working interval is increased, and the charging capability of the thin film transistor is improved.

The invention relates to a method for producing a material connection, in particular a welded connection, between an upper joining part (52) and a lower joining part (54), in which the following method steps are carried out: first, the upper joining part (52) is connected to the lower joining part (54); an upper engagement part (52) having a substantially flat first contact surface (66) is arranged above a lower engagement part (54) having a projection or projection (56). The arrangement is then supported by a load-bearing or support structure (50). A punctiform, flat welding head (64) is then positioned above the contact area (70) between the upper joining part (52) and the lower joining part (54). Finally, a material connection, in particular a welded connection, is produced in the contact region (70).

This utility model discloses a water-cooled vacuum capacitor, comprising: an insulating shell and two electrode groups. Each electrode group includes an electrode disk and an electrode ring group fixed to the electrode disk. The insulating shell is sealed and connected to the two electrode disks to form a vacuum chamber. The two electrode ring groups are coupled and housed within the vacuum chamber. At least one electrode disk has a water-cooling chamber inside, and also has an inlet and an outlet communicating with the water-cooling chamber. By incorporating a water-cooling chamber within at least one electrode disk, this utility model can directly cool the electrode group from the heat source, significantly improving heat dissipation efficiency, enhancing the voltage withstand stability of the vacuum capacitor, reducing the impact of high temperature on capacitance, thereby ensuring impedance matching of the equipment, improving the electrical performance stability of the vacuum capacitor under high-frequency conditions, and meeting users' requirements for high current and voltage withstand stability of vacuum capacitors.

The invention provides a high electron mobility transistor and a preparation method thereof, and relates to the technical field of transistor design. Comprising a substrate, a nucleating layer, a buffer layer and an electrode layer which are stacked in sequence, at least one set of multi-channel structure is arranged between the buffer layer and the electrode layer, the multi-channel structure comprises a plurality of heterojunction structure layers and a cap layer, all the heterojunction structure layers are stacked, and the cap layer is located on the upper surface of the uppermost heterojunction structure layer; each heterojunction structure layer comprises a GaN channel layer and an AlScN barrier layer which are arranged in a stacked mode, the GaN channel layers and the AlScN barrier layers of every two adjacent heterojunction structure layers are alternately stacked, and the GaN channel layers and the AlScN barrier layers are connected to form a heterojunction and form an interface with a two-dimensional electron gas channel. According to the high-electron-mobility transistor, the performance of the transistor is improved by changing the material forming the heterojunction and designing a multi-communication structure, so that the requirements of high frequency and high power are better met.

The invention discloses a field reflection plasma dynamic forming device and method, and belongs to the technical field of plasma. The device comprises a collision fusion area and two forming areas at the two ends of the collision fusion area, the forming area comprises a vacuum chamber, a main discharge coil, a bias coil and an ionization coil; the main discharge coil is wound on the outer surface of the vacuum chamber; the bias coil is wound on the outer side of the main discharge coil; the ionization coil is perpendicular to the main discharge coil and the bias coil; the bias circuit simultaneously introduces reverse current into the plurality of bias coils, and the bias coils generate a reverse magnetic field in the vacuum chamber; the ionization coil forms a rotating magnetic field to ionize gas in the vacuum chamber to generate plasma; the main discharge branch introduces forward current into the main discharge coil, the main discharge coil generates an axial gradient forward magnetic field, field reverse plasmas are dynamically formed, and collision fusion occurs in the collision fusion area. The working reliability and stability of the power supply are improved, and the repeatability of dynamically formed field reflection plasma is improved.

This scheme belongs to the field of prefabricated building design and construction, and specifically relates to a prefabricated concrete foundation for temporary enclosures at construction sites, including: fence poles and prefabricated fence foundations; the prefabricated fence foundation includes: a fixing hole is provided on the prefabricated fence foundation; the fence pole cooperates with the fixing hole; a slot is provided on the fence pole; and also includes: a first spring, a connecting rod, a positioning shaft, and a second spring; the first spring is set in the fixing hole; the positioning shaft is fixedly connected to the prefabricated fence foundation; the connecting rod is rotatably connected to the positioning shaft; the connecting rod contacts the first spring; one end of the second spring is fixedly connected to the prefabricated fence foundation, and the other end is fixedly connected to the connecting rod. This scheme uses the gravity of the fence pole itself, as well as its cooperation with the prefabricated fence foundation, to achieve automatic locking, thereby reducing manual operation. The prefabricated fence foundation is manufactured in a factory, which can not only be mass-produced, but also prefabricated in advance, ensuring quality, saving time, simplifying construction and installation steps, and improving assembly efficiency.

The utility model discloses a heavy current common mode choke of splayed pin mode, including magnet ring, first coil, second coil and bottom plate, first pin and second pin are respectively provided on the two sides of first coil, third pin and fourth pin are respectively provided on the two sides of second coil, and the bottom plate is provided with the first pin and the second pin. The bottom plate is provided with a first plug hole matched with the first pin, a second plug hole matched with the second pin, a third plug hole matched with the third pin, a fourth plug hole matched with the fourth pin, a third plug hole matched with the first pin, a third plug hole matched with the second pin, a fourth plug hole matched with the third pin and a fourth plug hole matched with the fourth pin. The first plug-in hole and the second plug-in hole incline upwards by 13 degrees along the center of the bottom plate, and the third plug-in hole and the fourth plug-in hole incline upwards by 13 degrees along the center of the bottom plate, so that a splayed pin outlet mode is formed, the space is saved, the installation and welding difficulty is reduced, and the situation that the heat dissipation performance of the inductor is possibly affected due to the fact that the distance between pins is small is avoided.

The present invention belongs to the field of energy storage, and specifically provides a voltage balancing control method, system, device and medium for a cascade energy storage system, comprising: step 1, obtaining a total starting current of a target cascade energy storage system; step 2, obtaining an initial distribution current of each level of a converter unit in the target cascade energy storage system according to the total starting current of the target cascade energy storage system; step 3, starting each converter unit in the target cascade energy storage system in sequence based on the initial distribution current and in combination with a predetermined time interval; during the starting process of each converter unit, adjusting the initial starting current of the next converter unit to be started according to the output voltage information of the currently started converter unit; the present invention can ensure that the starting process of the converter unit meets the power grid demand and takes into account the actual operating state of the system, thereby realizing voltage balancing control of each converter unit during the starting process.

The present invention relates to the field of display technology, and proposes a pixel driving circuit, a pixel structure and a display panel. The pixel driving circuit includes a plurality of driving transistors, each of which has a first end connected to a first power supply end, a second end connected to a first node, and a control end connected to a second node, and is used to input current to the first node under the action of a second node voltage. The pixel driving circuit can be applied to a low pixel density area of ​​a display panel, thereby avoiding a brightness difference between a low pixel density area and a high pixel density area.

The remote power supply voltage regulation and control device comprises an inverter, an input reactor, an output reactor, a dry-type transformer, an input contactor, an output contactor and an isolating switch, and is characterized in that the dry-type transformer is arranged close to a motor load; the output end of the inverter is connected with the input end of the output reactor, the output end of the output reactor is connected to a primary winding of the dry-type transformer, one end of a secondary winding of the dry-type transformer is connected with a three-phase power supply, and the other end of the secondary winding of the dry-type transformer is connected with a motor load through the output contactor. According to the remote power supply voltage regulation and control device, the inverter and the dry-type transformer are used for compensating the voltage signal input to the motor load, the phenomenon that the voltage of the motor load is too low is avoided, the situation that the current in a power supply line between the power supply equipment and the motor load is too large is avoided, the electric energy loss of the power supply line is reduced, and the service life of the power supply line is prolonged. And the electricity utilization cost is saved for coal mine enterprises.

The invention relates to a dual-active bridge type conversion circuit, a converter and an energy storage power supply. The dual-active bridge type conversion circuit comprises a primary side full-bridge module, a reference conversion module, at least one group of additional conversion modules and a control module, the at least one group of additional conversion modules is connected in parallel with the reference conversion module, and each group of additional conversion modules comprises a switch unit; the primary side full-bridge module, the reference conversion module, the at least one group of additional conversion modules and each switch unit are connected with the control module; the control module is used for controlling the switch unit to be in an off state under the condition that the dual-active bridge type conversion circuit is in first load or no-load operation, and performing phase shift control on power devices in the primary side full-bridge module and the reference conversion module; the first load is smaller than or equal to a preset light load threshold. By adopting the dual-active bridge type conversion circuit, the efficiency of the DAB converter can be improved.

The utility model discloses a novel large-current via hole wiring terminal, which comprises an insulating base and a conductive assembly, and one end of the insulating base is provided with a plug hole; the conductive assembly is located in the insulating base and comprises a conductive piece and a double-layer metal elastic piece, a wire harness or a copper bar in the power box is clamped through the double-layer metal elastic piece so that the power box can be fixedly connected with the wiring terminal, and insertion connection is achieved through the double-layer metal elastic piece to replace traditional bolt connection. The connection between the power box and the wiring terminal is convenient and fast, and the operation difficulty is reduced; and secondly, the metal elastic sheet adopts a double-layer design, so that the strength and the stability of the metal elastic sheet are enhanced, the conductivity of the metal elastic sheet is also improved, and the metal elastic sheet can bear larger current and is suitable for being applied to a high-power and large-current power box.

A current peak value measurement apparatus (100), a high voltage generator (200), and a therapeutic device for vascular calcification. The current peak value measurement apparatus (100) comprises a PCB Rogowski coil (10), a sampling resistor (11), a signal amplification circuit (12), an integration and voltage retaining circuit (13) and a micro-controller (14), wherein the PCB Rogowski coil (10) is used for sensing a current signal in a line to be tested, and for obtaining a corresponding induced electromotive force; the sampling resistor (11) is connected to the PCB Rogowski coil (10); the signal amplification circuit (12) is connected to the sampling resistor (11); the integration and voltage retaining circuit (13) is connected to the signal amplification circuit (12); and the micro-controller (14) is connected to the integration and voltage retaining circuit (13), and is used for performing ADC sampling on the maximum value of a voltage signal, and for obtaining a current peak value of the current signal in the line to be tested according to ADC sampling data and preset current rating data. The apparatus (100) can realize real-time monitoring over a pulse current and accurately measure a current peak value of the pulse current, which does not affect an original high-voltage discharge loop, and the apparatus has the advantages of a high safety, a fast response speed, a stable process, a high consistency and a low cost.

The invention discloses a low reverse threshold voltage gallium nitride HEMT (High Electron Mobility Transistor) device based on a discrete gate. The device comprises an epitaxial layer of a convex structure or a stepped structure; wherein the protruding part of the epitaxial layer, namely the upper table top, is called an active region, the upper surface of the active region is provided with a source electrode, a top gate electrode and a drain electrode, the source electrode and the drain electrode are located at the two ends of the upper surface of the active region respectively, and the top gate electrode is located between the source electrode and the drain electrode; one or more discrete side gate electrodes are arranged on the upper surface of the lower table top of the epitaxial layer of the stepped structure, and one or more discrete side gate electrodes are arranged on the upper surfaces of the lower table tops on the two sides of the epitaxial layer of the convex structure respectively. According to the GaN HEMT power electronic device, the discrete side gate electrode structure is introduced, so that the device realizes lower reverse conduction threshold voltage under the condition that the forward threshold voltage is not reduced, and the GaN HEMT power electronic device can be used for solving the problems of overlarge dead time loss and the like when the GaN HEMT power electronic device works reversely.

The application relates to the technical field of optical fiber connectors, and discloses an anti-loosening optical fiber connector which comprises a connector main body, a transmitting end fixedly connected to the side surface of the connector main body, a connecting block fixedly connected to the side surface of the connector main body away from the transmitting end, a clamping mechanism fixedly connected to the side surface of the connecting block away from the connector main body, a protective sleeve fixedly connected to the side surface of the clamping mechanism away from the connector main body, a self-locking mechanism movably connected to one side of the protective sleeve close to the clamping mechanism, and a detection mechanism movably connected to the other side of the protective sleeve away from the clamping mechanism. The optical fiber cable is placed in the limiting block and the lower half screw rod, the upper half screw rod and the lower half screw rod are in contact with each other, the optical fiber cable is fixed between the upper half screw rod and the lower half screw rod, finally the threaded sleeve is turned into the outside of the upper half screw rod and the lower half screw rod, the upper half screw rod and the lower half screw rod are fixed, the position of the optical fiber cable is fixed, and the installation is more firm.

The object of the present invention is to provide a thermal power generation battery with excellent battery characteristics. The above problem can be solved by a thermal power generation element that does not require a temperature gradient, wherein a first part comprising a semiconductor which produce thermally excited electron and hole, a second part comprising an electrolyte in which an charge transport ion pair can be moved therein, and a third part comprising a substance that is an electrode, are in contact with each other in this order, and wherein a valance band potential of the semiconductor of the first part is positive with respect to a redox potential of a charge transport ion pair; and an ion which is more susceptible to oxidation among the two ions is oxidized at an interface between the first part and the second part; and an ion which is more susceptible to reduction among the two ions is reduced at an interface between the third part and the second part; and wherein the thermal power generation element satisfies the following formula (I): L / IDT=1−20 wherein L is a "shortest distance between the first part and the third part", and IDT is "ion diffusion thickness."

The present application provides a preparation method and application of a crystalline silicon solar cell having a shallow junction diffusion emitter. The preparation method comprises a diffusion process and a chain oxidation process, the diffusion process comprises low temperature diffusion and high temperature propulsion, and the chain oxidation process comprises high-temperature chain oxidation. According to the present application, firstly, a low-doped diffusion shallow junction having a depth of 0.15 um is prepared by means of optimization of the diffusion process, and doping with a certain dose concentration is formed on the surface of a diffusion layer by using photon thermal activation radiation energy of high-temperature chain oxidation, so as to solve the mismatch problem of alloy ohmic contact subsequently formed with silver paste, and finally, the photoelectric conversion efficiency is improved to a high degree.

Embodiments of the present disclosure provide a display panel and a display device, and relate to the technical field of display, and are used for improving the display effect of the display panel. The display panel comprises a substrate and a plurality of sub-pixels. The sub-pixel comprises a pixel circuit, and the pixel circuit comprises a driving sub-circuit, a coupling sub-circuit, a data writing sub-circuit and a first control sub-circuit. The coupling sub-circuit is connected with the driving sub-circuit. The data writing sub-circuit is connected with the coupling sub-circuit. The first control sub-circuit is connected with a first control signal line, a first reference voltage signal line and the coupling sub-circuit respectively. Wherein, the plurality of sub-pixels comprise a first color sub-pixel and a second color sub-pixel, the first reference voltage signal line comprises a first sub-signal line and a second sub-signal line, the first sub-signal line is connected with the first control sub-circuit of the pixel circuit in the first color sub-pixel, and the second sub-signal line is connected with the first control sub-circuit of the pixel circuit in the second color sub-pixel. The display panel is used for displaying an image.

An object of the present invention is to provide a semiconductor element capable of being manufactured in small size, easily and at a low cost and obtaining a large on-current, a semiconductor integrated circuit, and a production method for the semiconductor element. A semiconductor element 10 has an element structure of a tunnel field-effect transistor. A channel part 13 formed of an indirect transition-type semiconductor is formed as a plate-like shaped portion having one end connected to a source part 14 and the other end connected to a drain part 15. Of two pairs of opposing surfaces of first opposing surfaces and second opposing surfaces which constitute the channel part 13 and are opposed in a direction perpendicular to the direction in which a current flows from the source part 14 to the drain part 15, at least one pair of the opposing surfaces selected from the two pairs is formed by arranging at a facing interval of 15 nm at the longest between the opposing surfaces, electron confinement surfaces in which a band structure of a direct transition-type semiconductor is capable of being simulatively given to the indirect transition-type semiconductor by regulation of electron motion.