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

The embodiment of the invention provides an electric connection socket, an optical module and an optical module cage. The electric connection socket comprises an insulating base body and at least twofirst pins, wherein the base body includes an upper surface, a lower surface and a first side surface connected with the upper surface and the lower surface, and an electric signal slot is arranged inthe first side surface and used for being coupled with an electric signal terminal of the optical module; and one ends of the at least two first pins are located on the upper surface, the other endsof the at least two first pins extend from an internal portion of the base body to the lower surface, and the at least two first pins are coupled to electronic equipment. The electric connection socket provided in the invention can be applied to various interface modules, such as the optical module, an electric port module and the like, and is used for supporting an interface module to supply power to the electronic equipment by utilizing an Ethernet power supply technology while having an original signal transmission function so that the electronic equipment does not need to be additionally provided with a POE interface, and a size of the electronic equipment is reduced.

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 provides a circuit structure of a single-stage boosting three-phase flyback inverter applied to solar energy grid-connected power generation. The inverter comprises a high-frequency flyback converter, a primary switching element, six secondary switching elements, six diodes and a filter part, and therefore three-phase currents meeting grid connection requirements are provided. A single-stage structure is adopted in the circuit of the inverter, direct-current electricity is directly transmitted to a power grid through a DC / AC converter, primary DC / DC conversion is reduced, and therefore efficiency of the converter is improved. The flyback inverter operates under a current intermittent mode, a direct-current side switching original element can conveniently control and output three-phase voltage through a PWM mode, and meanwhile, under the current intermittent mode, an alternating-current switching original element can also achieve a zero-current soft switching target.

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 broadband coupling circuit for multicarrier communication. The circuit comprises a coupling transformer and an LC series-resonant circuit, wherein the LC series-resonant circuit is connected with a power amplifier output end which is used for amplifying a to-be-transmitted band-pass signal, a primary side of the coupling transformer is connected with a capacitor of the LC series-resonant circuit in parallel so as to obtain the amplified band-pass signal, and a secondary side of the coupling transformer is connected with an AC power line. The broadband coupling circuit for multicarrier communication meets smooth transmission of the band-pass signals of all frequency points in a multicarrier frequency point power line carrier communication system, and the amplitude-frequency characteristic of the circuit is flat; the circuit plays an excellent role in attenuation of low-frequency noise signals; and simultaneously, the circuit provides release loop protection in a case of surging.

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 mushroom type artificial magnetic conductor structure. The magnetic conductor structure comprises two center metal strips intersecting in a cross shape and equal in length, and the intersecting position of the two center metal strips is grounded through a metal via hole; each center metal strip is provided with a plurality of vertical metal strips with one ends perpendicular to the center metal strip making contact with the vertical metal strips, the length of the vertical metal strips is one second that of the center metal strips, and the vertical metal strips on the center metal strips are equal in number and distributed in a central symmetry mode. The mushroom type artificial magnetic conductor structure is compatible with a CMOS technology, plays an electrical isolation role between an on-chip antenna and a silicon substrate, has the characteristic of restraining surface waves within a specific frequency band and then improves the irradiation efficiency of the on-chip antenna. The mushroom type artificial magnetic conductor structure can improve the irradiation efficiency of the on-chip antenna, isolate vortex currents of on-chip spiral passive elements and improve the quality factor of the on-chip spiral passive elements.

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-type flexible voltage regulation topological structure for a power distribution network based on an AC-DC converter. The structure provided by the invention can guarantee the qualified rate of the voltage of a user terminal, and improves the power supply quality. The structure comprises a power frequency double-split transformer, a first double-step-down / step-up AC-AC transformer module, a second double-step-down / step-up AC-AC transformer module, an inductor L, a capacitor C, and a bypass switch S. the main points of the structure are that a first primary side of the power frequency double-split transformer is connectedwith the input end of the first double-step-down / step-up AC-AC transformer module, and a secondary side of the power frequency double-split transformer is connected with the input end of the second double-step-down / step-up AC-AC transformer module.

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 a segmentation and phase-split insulator. The segmentation and phase-split insulator comprises a primary insulation structure, a slide board and a fixed clamping board, wherein the primary insulation structure comprises an upper insulating rod and a lower insulating rod, the slide board comprises a primary slide board and an assistant slide board, the outer sides of the two ends of the lower insulating rod are provided with contact wire connector cable clamps, the primary slide board and the contact wire connector cable clamps are all fixedly connected to the fixed clamping board, the primary slide board is provided with an arc-striking rod, the arc-striking rod and the primary slide board are integrally formed, the length of the upper insulating rod is smaller than that of the lower insulating rod, and the cross section of the upper insulating rod is larger than that of the lower insulating rod. According to the segmentation and phase-split insulator, the overall stability and bending resistance of the segmentation and phase-split insulator are improved, the overall weight is reduced, and parts which are prone to damages and consumption are conveniently replaced; meanwhile, the arc-striking rod and the primary slide board are integrally formed, thus smooth transition of pantographs can be guaranteed, and thus the security and reliability of the segmentation and phase-split insulator are improved and the service life of the segmentation and phase-split insulator is prolonged.

The invention discloses a busbar electrical isolation assembly, which comprises a first plate and a second plate, wherein the first plate and the second plate are made of insulating materials, the second plate is fixedly arranged on the first plate, the second plate is perpendicular to the first plate, the second plate is located between two adjacent busbars, and the first plate is located on thesides, which are close to a battery cell, of the busbars. The second plate is arranged on the first plate corresponding to a gap between the two adjacent busbars, and is located between the two adjacent busbars, so that the second plate can play a role in electrically isolating the two adjacent busbars. The busbar electrical isolation assembly is only composed of two insulating plates, and the occupied space of the assembly is relatively small; and in the installation process, only the first plate needs to be inserted between the busbar and the battery cell, and the second plate is located between the two adjacent busbars, so that the installation process is relatively simple and convenient.

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 12kV high-voltage switchgear. The switchgear comprises a cabinet (1), wherein a switch operating mechanism (4) located on the left side of a front door is arranged on the cabinet (1); a mechanical interlocking mechanism (20) is arranged on the back side of the switch operating mechanism (4); the mechanical interlocking mechanism (20) comprises a support (33), a crank arm (25), a connecting rod (24), an upper rotating arm (32), a lower rotating arm (22) and a locking plate (21); the locking plate (21) is parallel with a rotating shaft of an operation positioning handle (2) and can slide in a support (28); a hinge pin (3) is arranged on the locking plate (21); one end of the crank arm (25) is mounted on a circuit breaker drive shaft (26) of a vacuum circuit breaker (18). The 12kV high-voltage switchgear has the benefits as follows: the 12kV high-voltage switchgear is compact in structure, simple to operate and safe and reliable to use and has a complete mechanicalinterlocking function.

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.

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 belongs to the technical field of on-load tap-changers, and discloses an on-load tap-changer single-resistor transition circuit and a voltage regulation method, and the on-load tap-changer single-resistor transition circuit comprises a first main through-flow switch, a second main through-flow switch, a first switch element, a second switch element, a third switch element, a fourth switch element, a change-over switch and a transition resistor. The first switch element and the fourth switch element are used as load current breaking elements, the second switch element and the third switch element are used as circulating current on-off elements, load current is broken by turns through the two load current on-off elements, interstage circulating current in the on-load switching process is broken by turns through the two circulating current on-off elements, the switching program is symmetrical, the working loss degrees of the two circulating current on-off elements are consistent, so that the switching loss of the circulating current on-off elements is reduced, and the electrical life of the on-load tap-changer is greatly prolonged.

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 discloses a safe and reliable electric shaver. The safe and reliable electric shaver comprises a shaver body, and a charging system is arranged inside the shaver body. The charging system comprises a charging circuit. The charging circuit comprises a transformer, a motor, a battery, a switch, a first diode and a third diode. The battery is a direct current battery. The third diode is a light emitting diode. The primary side of the transformer serves as the input end of the charging circuit. According to the safe and reliable electric shaver, the charging circuit is simple in structure, the functions are complete, and use is safe and convenient.

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 relates to a resonant DC-DC converter, which comprises a first inverter circuit, a second inverter circuit, a first resonant circuit, a second resonant circuit, a first high-frequency transformer, a second high-frequency transformer, a first rectifying circuit and a second rectifying circuit, wherein the input end is respectively connected with the direct current input ends of the first inverter circuit and the second inverter circuit; the output ends of the first rectifying circuit and the second rectifying circuit are connected in parallel and then connected with the output end; the output end of the first inverter circuit is connected with the input end of the first resonant circuit, the output end of the first resonant circuit is connected with a primary winding of the first high-frequency transformer, and a secondary winding of the first high-frequency transformer is connected with the first rectifying circuit; and the output end of the second inverter circuit is connected with the input end of the second resonant circuit, the output end of the second resonant circuit is connected with the primary winding of the second high-frequency transformer, and the secondary winding of the second high-frequency transformer is connected with the second rectifying circuit. The converter is composed of the two resonant converters which are connected in parallel in an interleaving mode and serve as redundant backups of each other, and reliability and safety of the converter are improved.

The invention discloses a high-voltage AC vacuum circuit breaker, which comprises an operating system control box, a protection housing, a first pole column, a second pole column and a third pole column. The surface of the operating system control box at one side of an observation window is equipped with an energy storage operation handle; and the surface of the operating system control box at the other side of the observation window is equipped with a manual open-close control knob. The surfaces of the first pole column, the second pole column and the third pole column are respectively provided with a first insulation umbrella skirt. The surface of a vacuum arc-extinguishing chamber is equipped with the current transformer through a second metal installation flange. The top portion of the vacuum arc-extinguishing chamber is equipped with a wiring porcelain column through a bolt. The top portion of the operating system control box at the outer side of the first pole column, the second pole column and the third pole column is provided with the protection housing through long-neck bolts. The high-voltage AC vacuum circuit breaker has the advantages of being convenient to operate, high in safety and long in service life and the like through a series of structures.

The invention provides a transparent and open two-stage bidirectional multi-functional converter display platform which comprises an upper monitoring layer and a device layer. The upper monitoring layer includes a monitoring unit and a measuring instrument, and the device layer includes a chopper converter unit and an AC and DC converter unit. The technical scheme provided by the invention allowspeople who are in contact with the electric power technology in the early stage to quickly understand the equipment composition and working principle of a power electronic converter, people engaged inrelated technological development can carry out secondary development and research based on a display platform provided by the invention and the working efficiency is improved.

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.