32results about How to "Play the role of electrical isolation" patented technology

The invention discloses a junctionless silicon nanowire transistor based on a bulk-silicon material and a method for manufacturing the junctionless silicon nanowire transistor. The junctionless silicon nanowire transistor comprises a bulk-silicon substrate, a polycrystalline grid, a drain electrode, a source electrode and a grid electrode, a P-type doped layer or an N-type doped layer is manufactured on the bulk-silicon substrate, an N-type doped layer or a P-type doped layer with a doping type opposite to the first P-type doped layer or first the N-type doped layer is manufactured on the first P-type doped layer or the first N-type doped layer, and a PN junction is formed by the different types of doped layers and realizes an electric isolation effect; a source region, a drain region and a silicon nanowire are manufactured on the second N-type doped layer or the second P-type doped layer, and the source region and the drain region are connected with each other by the silicon nanowire to form conducting channels; an insulating dielectric layer is manufactured on the surface of the integral silicon nanowire, the surface of the source region and the surface of the drain region; the polycrystalline grid is manufactured between the source region and the drain region and completely wraps the silicon nanowire; the drain electrode is manufactured on the drain region of silicon; the source electrode is manufactured on the source region of the silicon; and the grid electrode is manufactured on the polycrystalline grid. The junctionless silicon nanowire transistor and the method have the advantage that the junctionless silicon nanowire transistor can be manufactured on the bulk-silicon substrate.

The invention discloses a medium voltage frequency conversion power circuit system, which belongs to the technical field of electric power systems, and comprises a step-down transformer, a converter array and a step-up transformer which are sequentially connected in series, wherein the input end of the step-down transformer is connected with the output end of a three-phase supply of a medium voltage power grid, and the output end of the step-up transformer is a frequency conversion voltage output. The invention reduces the number of three-phase rectifiers and has balanced power, so the output voltage can be further improved, and the system has the advantages of simple integral structure, improved power grid side power factor and more perfect overall performance.

The invention discloses a low-eddy-current-loss primary structure of a tooth groove type cylindrical linear motor. The low-eddy-current-loss primary structure comprises primary teeth, a primary yoke and a plurality of ring windings; the primary teeth and the primary yoke are separated components and are tightly sleeved together to form a primary iron core; one or more circular ring windings are embedded between every two primary tooth components; each annular primary tooth component is formed by arranging a plurality of tooth iron core blocks of the same specification in an array mode along the side length of an equilateral polygon, and each iron core block is formed by laminating silicon steel sheets in the circumferential direction; and the primary yoke component is formed by laminating silicon steel sheets along the motion direction of the motor, and each lamination is uniformly provided with a plurality of yoke shallow slots along the circumferential direction so as to block an eddy current path along the direction. According to the low-eddy-current-loss primary structure of the tooth groove type cylindrical linear motor of the invention, the primary iron core is combined by adopting a mode of tooth and yoke separation and lamination in different directions, so that the eddy current loss of the tooth groove type cylindrical linear motor can be effectively reduced, the efficiency of the motor is improved, and meanwhile, the motor can maintain relatively high thrust density.

The invention belongs to the technical field of operation power distribution and voltage regulation of a power distribution network, and especially relates to a distributed flexible voltage-regulationcontrol system for a power distribution network. The system provided by the invention can guarantee the qualified rate of the voltage of a user terminal, and improves the power supply quality. The system comprises a power frequency double-splitting transformer, a first double buck / boost AC-AC converter module, a second double buck / boost AC-AC converter module, an inductor L, a capacitor C, a DSP,and a bypass switch S. The structural main points of the system are that a first secondary side of the power frequency double-splitting transformer is connected with the input end of the first doublebuck / boost AC-AC converter module, and a second secondary side of the power frequency double-splitting transformer is connected with the input end of the second double buck / boost AC-AC converter module; one output end of the first double buck / boost AC-AC converter module is connected with one end of the capacitor C and one end of the bypass switch S through the inductor L.

The invention discloses a heat exchange type water-storage electric water heater. A cavity is arranged inside a box body; the upper side of the cavity is rotatably connected with a box cover; two gasexhaust holes are formed inside the box cover for preventing excessively great pressure caused by heating; the box body is mainly used for loading deionized water or heat conduction oil; deionized water or heat conduction oil is heated by a heating tube; and deionized water or heat conduction oil is heated by a spiral tube for conducting and heating through water, so that the risk due to the factthat hot water to be used in direct contact with the heating tube generates water scales to cover an electric heating tube is avoided; moreover, a water path does not apply pressure to the box body, and the box body can be manufactured into various forms according to the needs while a pressure bearing problem does not need to be considered excessively, so that space usage is saved; besides, a flowing water body is heated, so that the problem that a retained water body in the conventional electric water heater breeds bacteria can be avoided, and use health degree of people is improved. Besides,the length and the forms of a water outlet tube and a water inlet tube are arranged, so that the electric isolating effect is improved from the physical layer.

The invention discloses an isolation level circuit for a smart transformer, and the isolation level circuit comprises a half-bridge inverter circuit, a small-sized transformer and a half-bridge rectifier circuit, wherein the half-bridge inverter circuit is used for realizing conversion from DC (Direct Current) to AC (Alternating Current); the small-sized transformer is used for realizing AC-AC transformation conversion; and the half-bridge rectifier circuit is used for realizing AC-DC conversion.

The invention discloses a totally-enclosed type outdoor high-voltage isolation switch which comprises two wiring terminals, two contacts, a disconnecting link and a locking mechanism, wherein the two wiring terminals are respectively and fixedly connected with upper end faces of two insulating supports, two contacts are respectively and fixedly connected to two insulating supports and are conducted with the corresponding wiring terminals, and the disconnecting link is connected with two contacts; the locking mechanism is made of a high-strength polyimide material and the insulating supports are made of alicyclic resin materials with an atmospheric ageing resistance; a fixed end of the disconnecting link is rotatably connected with one contact and throughout contacted with the contact, and a movable end of the disconnecting link is contacted with the other contact and is locked or unlocked through the locking mechanism; and all of the two contacts and the disconnecting link are pre-buried into insulating resin materials. According to the invention, all charged bodies are totally enclosed into outdoor type insulating materials, so that the actual total enclosing is realized and short-circuit faults are effectively avoided.

The invention discloses a primary structure of a low eddy current loss cogging type cylindrical linear motor, which includes primary teeth, primary yokes and multiple circular ring groups; the primary teeth and primary yokes are separate components and are tightly fitted together , forming the primary iron core; one or more circular ring groups are embedded between each two primary tooth assemblies; the ring-shaped primary tooth assembly consists of multiple tooth core blocks of the same specification arranged in an array along the side length of an equilateral polygon Each core block is made of silicon steel sheets laminated along the circumferential direction; the primary yoke assembly is made of silicon steel sheets laminated along the motor moving direction, and each lamination is evenly opened with a number of shallow grooves in the yoke along the circumferential direction to prevent Break the eddy current path along this direction. The invention adopts the method of separating the teeth and yokes and laminating sheets in different directions to form the primary iron core, which can effectively reduce the eddy current loss of the cogged cylindrical linear motor, improve the efficiency of the motor, and at the same time maintain a high thrust density of the motor.

Embodiments of the present application provide an electrical connection socket, an optical module, and an optical module cage. Wherein, the electrical connection socket includes: an insulating base body; the base body includes an upper surface and a lower surface, and a first side connected to the upper surface and the lower surface, the first side is provided with an electrical signal slot, and the electrical signal slot is used to communicate with the The electrical signal terminals of the optical module are coupled; at least two first pins; one end of the at least two first pins is located on the upper surface, and the other end extends from the inside of the base to the lower surface, and the at least two first pins are used for coupling to electronic equipment. The electrical connection socket provided in the embodiment of the present application can be applied to various interface modules, such as optical modules, electrical port modules, etc., and is used to support the interface modules to use Power over Ethernet technology to provide electronic The device is powered, so that the electronic device does not need to be additionally equipped with a POE interface, which is conducive to reducing the size of the electronic device.

The invention discloses an MEMS device and a manufacturing method thereof. The method comprises the following steps: forming a first functional layer; forming a first sacrificial layer on the first functional layer; forming a through hole in the first sacrificial layer, wherein the through hole penetrates through the first sacrificial layer; forming a second sacrificial layer on the first sacrificial layer, wherein a groove is formed in the second sacrificial layer; forming a second sacrificial layer on the first sacrificial layer, and forming a second functional layer on the second sacrificial layer, wherein, grooves in the second sacrificial layer are filled with the second functional layer to form an anti-sticking structure, the first sacrificial layer is made of a low-density silicon oxide material, and the second sacrificial layer is made of a high-density silicon oxide material. According to the manufacturing method of the MEMS device, an anti-sticking structure is formed on the surface of one side, close to a cavity, of a vibrating diaphragm or a back polar plate. The anti-sticking structure is formed by two sacrificial layers and has a smoother morphology. In addition, when the vibrating diaphragm is greatly deformed, the stress concentration of the vibrating diaphragm is reduced, so that the failure of the MEMS device and the cost of the product are reduced.

A formation method of a fin-type field-effect transistor is disclosed. The method comprises the following steps of providing a substrate including an effective area, first edge areas located on two sides of the effective area and a second edge area located on one side of the first edge area, and forming a fin portion on the substrate; forming a first graph layer covering an effective area fin portion and a first edge area fin portion; etching to remove a fin portion with a first thickness of the second edge area; forming a second graph layer covering the effective area fin portion; and taking the second graph layer as a mask layer, and etching to remove the fin portion with a second thickness of the first edge areas, wherein the second thickness is less than the first thickness. In the invention, through reducing an amount of the fin portion which is etched and removed on the substrate of the first edge areas next to the effective area, etching damages of the second graph layer are reduced or avoided so that the fin portion on the substrate of the effective area is prevented from exposing in an etching environment; the fin portion on the substrate of the effective area is prevented from being etched and damaged; and the fin portion on the substrate of the effective area possesses good morphology so that performance of the formed fin-type field-effect transistor is improved.

The invention provides a self-powered wireless hydraulic pressure sensor based on a piezoelectric technology, which comprises a sensor body and a sensor metal head, wherein the sensor body comprises a packaged shell with a cavity; the cavity of the packaged shell is internally provided with a transition film; the transition film separates the cavity to an oil liquid cavity and an insulation cavity; the insulation cavity is internally provided with a circuit board and a piezoelectric module; the piezoelectric module is cylindrical and is transversely arranged in the insulation cavity; one end of the cylindrical piezoelectric module is tightly attached to the transition film; the oil liquid cavity is internally provided with a filter element; a damping hole is arranged in the sensor metal head; the damping hole is communicated with the cavity of the packaged shell through the filter element; the circuit board is provided with an energy management module, a signal processing module and a wireless transmission module; and the piezoelectric module comprises a pressure sensor unit and a piezoelectric energy harvester unit. The self-powered wireless hydraulic pressure sensor based on the piezoelectric technology is applicable to the pressure sensor field, no signal line is required for signal transmission, and no power line is required for power supply.

The invention discloses a Micro-LED array device based on group III nitride semiconductors, which is etched to form an array fan-shaped mesa structure that penetrates the p-type GaN layer, the quantum well active layer, and reaches the n-type GaN layer, and the p-type array The electrodes are vapor-deposited on the p-type GaN layer of the fan-shaped array, and the n-type array electrodes are vapor-deposited on the n-type GaN layer, and the n-type array electrodes form barriers to isolate the fan-shaped mesas from each other. And discloses its preparation method. In the present invention, a retaining wall made of n-type electrodes is added between the light-emitting units of the Micro-LED fan-shaped table array. The problem of crosstalk between units is beneficial to realize individual control; the use of n-type electrode metal as a retaining wall and the use of p-type electrodes with a mesh structure increases the current expansion range and effectively improves luminous efficiency.

The invention relates to an all-fiber current transformer and an all-fiber current transformer unit. The all-fiber current transformer comprises a sensing ring, a first cylinder body, a second cylinder body and an insulating ring arranged between the first cylinder body and the second cylinder body, the insulating ring plays a certain role in supporting the fixed installation of the first cylinder body and the second cylinder body and also plays a role in electrical isolation, and the first cylinder body and the second cylinder body are prevented from forming a conductive loop. The interference of the induction current on the all-fiber current transformer is effectively avoided, and the precision of the all-fiber current transformer is improved. According to the all-fiber current transformer, the sensing ring containing cavity is defined after the first cylinder body and the second cylinder body are in butt joint, and the sensing ring is directly arranged in the sensing ring mounting cavity, so that the mounting steps are reduced, the structure of the all-fiber current transformer is simplified, and the technical problem that the assembling efficiency of an all-fiber current transformer unit is low due to the fact that an existing current transformer is complex in structure is solved.

The invention discloses an on-load tap-changer single-resistor symmetrical transition circuit and a voltage regulation method. The transition circuit comprises a first main contact, a second main contact, a main vacuum contact, a first auxiliary vacuum contact, a second auxiliary vacuum contact, a first isolation switch, a second isolation switch, a change-over switch and a transition resistor. Two auxiliary switch elements exist in the transition circuit, interpolar ring current in the on-load switching process is switched on and off in turn, the switching process is symmetrical, the two auxiliary switch elements are consistent in current switching-on and switching-off tasks, the switching loss of the auxiliary switch elements is reduced, and the switching capacity of the main switch element and the switching capacity of the auxiliary switch elements can be balanced; only one transition resistor is used in the transition circuit, so that design and installation are facilitated, and the insulation distance is ensured; the two isolation switches are designed, so that an electrical isolation effect can be achieved, the isolation switches can be used as protection switches of auxiliary switch elements, and the fault that current cannot be cut off after the auxiliary switch elements fail is prevented.

The invention belongs to the technical field of operation power distribution and voltage regulation of a power distribution network, and especially relates to a distributed flexible voltage-regulationcontrol system for a power distribution network. The system provided by the invention can guarantee the qualified rate of the voltage of a user terminal, and improves the power supply quality. The system comprises a power frequency double-splitting transformer, a first double buck / boost AC-AC converter module, a second double buck / boost AC-AC converter module, an inductor L, a capacitor C, a DSP,and a bypass switch S. The structural main points of the system are that a first secondary side of the power frequency double-splitting transformer is connected with the input end of the first doublebuck / boost AC-AC converter module, and a second secondary side of the power frequency double-splitting transformer is connected with the input end of the second double buck / boost AC-AC converter module; one output end of the first double buck / boost AC-AC converter module is connected with one end of the capacitor C and one end of the bypass switch S through the inductor L.