33results about How to "Extend switch life" patented technology

The invention relates to a short-circuit current zero prediction method. The method comprises the steps that according to obtained offline data of an electric power transmission line, a support vector machine model is obtained through training, wherein the offline data includes performance parameters and single-phase earth fault parameters; the corresponding relation between time and current data is obtained according to the current data obtained when a single-phase earth fault happens in an online real-time collecting circuit, and the starting moment when the single-phase earth fault happens is determined; according to the correspondence, the starting moment, a preset predicted data window length and the support vector machine model, a short-circuit current zero is obtained through calculation. The zero prediction precision is improved, the purposes of shortening the circuit breaker on-off arc blowout transition process and reducing contact electric erosion are achieved, and the safety operation level of a power grid is increased.

The invention provides an intelligent emergency lamp for nuclear environment. The intelligent emergency lamp comprises a casing, a liner assembly, a lamp holder, an indicator lamp light passing assembly, a handle, a support plate, a wire inlet mouth, a wire outlet mouth and a circuit device, wherein the liner assembly mainly includes a liner, a rubber sealing strip, a storage battery protection cover, and a circuit board protection cover; the casing and the liner form a double-layer protection structure; the lamp holder and the handle are fixedly mounted on the support plate; the indicator lamp light passing assembly and the wire inlet mouth are mounted on the casing and the liner; and the circuit device is mounted in the liner. The circuit device includes an illuminating lamp, an on-off power supply, a storage battery, an alarm, a test button, an indicator lamp and a circuit board, wherein the an intelligent control circuit is arranged on the circuit board; and the circuit device can provide continuous emergency lighting for 8 hours or more through the illuminating lamp when the normal lighting is interrupted. The intelligent emergency lamp provided by the invention is resistant to impact, voltage, radiation, shake, moisture, and corrosion, has high on-off switching speed, and is convenient in detection and test by using a combined test button.

A T-type dual-cantilever beam-type single-pole double-throw switch is mainly formed by a structure, a microwave transmission line, a driving electrode, an upper electrode, a lower electrode, a mooring anchor and an air bridge. The microwave transmission line and the driving electrode are arranged on the substrate, the upper electrode is a dual-cantilever beam, a middle anchor supports two cantilever beam structures respectively arranged at left and right sides, and the lower electrode employs a single contact, double contacts and three contacts which have elastic beams. At the aspect of mechanical aspects, the impact force for the lower electrode can be reduced caused by rapidly pulling the upper electrode due to the electrostatic force effect to play a buffer effect so as to protect the contacts and the upper electrode so as to enhance the effective contact and avoid ablation and adhesion caused by weak contact. When driving voltage is applied on a first driving electrode, the upper electrode is pulled down under the effect of the electrostatic force and then is contacted with the contacts, the switch is located in a conduction state, the upper electrode at the upper portion of a second driving electrode is warped so as to increase the isolation of the switch, avoid the self actuation between the upper electrode and the lower electrode and enhance the switch life and the microwave performance.

An on-load voltage regulating and capacitance regulating tapping switch comprises three operating mechanisms, three capacitance regulating switches and two voltage regulating switches, each operating mechanism is provided with a bi-stable state permanent magnet assembly and a poking rod of the bi-stable state permanent magnet assembly, each switch comprises a sealed vacuum insulating cylinder, and the switching surfaces of movable contacts and static contacts are located in vacuum cylinder cavities of the insulating cylinders; the width of the switching surface of the static contacts on the high voltage sides of the three capacitance regulating switches is smaller than that of the switching surface of the static contacts on the low voltage sides. As the switching surfaces of the movable contacts and the static contacts are located inside the vacuum cylinder cavities, the on-load voltage regulating and capacitance regulating tapping switch has the advantages that the arc extinguishing performance is reliable, the service life is long and oil of a transformer is not polluted by electric arcs; besides, the technology that a high-voltage winding is cut off firstly, then a low-voltage winding is cut off, the low-voltage winding is switched on, and then the high-voltage winding is switched on is adopted, so that the electric arcs are small, residual magnetism inside an iron core of the transformer is eliminated conveniently, flashy flow and overvoltage generated when the high-voltage winding is switched on again are avoided, and the voltage fluctuation amplitude is effectively reduced in the switching process.

The invention provides a combined valve. The combined valve can be free of leakage for a long time under severe working conditions. The combined valve comprises a combined valve body, wherein a medium inlet and a ball valve cavity communicated with the medium inlet are formed in one side of the combined valve body, a medium outlet and a stop valve cavity communicated with the medium outlet are formed in the other side of the combined valve body, the ball valve cavity is communicated with the stop valve cavity, a stop valve element arranged in the stop valve cavity a is connected with stop valve rod, a handle is connected to one end of the stop valve rod, a ball valve ball body arranged in the ball valve cavity is connected with a ball valve rod, the ball valve rod is connected with an output shaft at one end of a speed reduction mechanism, the other end of the speed reduction mechanism is connected with a driving gear for driving the speed reduction mechanism to rotate, the driving gear is meshed with a transition gear, and the stop valve rod drives the transition gear to rotate. The combined valve is integrally designed, has few leakage points, and is more reliable in pipeline installation, and more convenient to operate.

The invention relates to a T-shaped four-cantilever beam type electronic calibration member switch comprising a substrate for providing brace foundation, a microwave transmission component arranged onthe substrate, and a packaging component for packaging the microwave transmission component; the microwave transmission component comprises signal wire units arranged in a symmetric way, ground wireunits arranged at the peripheral sides of the signal wire units, an air bridge unit conducting to the ground wire units and a driving electrode arranged below the signal wire units. Compared with conventional single-pole double-throw switches, the T-type four-cantilever beam type electronic calibration member switch has obvious advantages, and a radio frequency MEMS switch has four cantilever beams to form a symmetric structure, so that insertion loss is reduced, return loss is promoted, and the isolation of the switch is excellent. Therefore, the life and the microwave performance of the switch are promoted. Electronic calibration of DC-40GHz can be realized, circuit complexity is reduced, calibration process is simplified, calibration efficiency and calibration accuracy are improved, andapplication of the radio frequency MEMS switch in the field of calibration of a vector network analyzer of a higher frequency band is realized.

The invention relates to the field of manufacturing an MEMS (micro-electromechanical system) device, and in particular relates to a preparation method of a millimeter wave RF-MEMS switch. The method mainly comprises the following steps: growing polycrystalline silicon and silicon dioxide on the surface of a high-resistant silicon wafer, washing the silicon wafer, manufacturing a CPW (carotid pulse wave) figure, manufacturing a silicon nitride insulating layer on an RF (radio frequency) transmission line, manufacturing a conductor layer on the silicon nitride insulating layer of the RF transmission line, manufacturing a sacrificial layer, manufacturing a film microbridge, releasing the sacrificial layer, annealing and testing performance. The millimeter wave RF-MEMS switch prepared by adopting the technical scheme provided by the invention is relatively high in rate of finished product and relatively long in the switch life, the insertion loss is low and the isolation degree is high in the millimeter wave frequency band, and the planarization method of the sacrificial layer in the manufacturing process is simple.

A thermally driven micromechanical switch for blocking or switching optical fibre signals in optical network is disclosed. 4 optical fibres perpendicular to each other are fixed on silicon board with a central pit for arranging a reflector in it. The said reflector with 45 deg of included angle relative to said optical fibres is fixed to one end of a cantilever whose another end is fixed to said silicon board. Its preparingp rocess includes corroding deep slots on the back of silicon board, corroding the silicon film at the position of cantilever, growing insulating film and metal film for making heating resistor, etching resistor bars, photoetching cantilever with reflector and optical fibre slots pattern, and corroding on front surface to form optical fibre slots, cantilever and microreflector.

The invention relates to a switch for an automobile brake lamp. The switch comprises a shell, a shell cover, a pushing rod, a positive electrode pin and a negative electrode pin, wherein the shell and the shell cover are correspondingly matched; one end of the positive electrode pin and one end of the negative electrode pin are respectively connected with electrodes; one end of the pushing rod extends out of the pushing rod hole of the shell, and the other end of the pushing rod is a U-shaped end, and two sides in the U-shaped end are respectively provided with a magnetic block; the two ends of the U-shaped rod of the pushing rod are respectively connected with a spring, and the other end of each spring is connected with the inner side of the shell cover; the positive electrode pin and the negative electrode pin are respectively arranged on the shell cover, and the electrode ends of the positive electrode pin and the negative electrode pin are respectively positioned in the shell cover, wherein one pin is of an L shape, thus the contact points of the electrodes of the positive electrode pin and the negative electrode pin are corresponding up and down, contact point ends of the positive electrode pin and the negative electrode pin are respectively positioned in a seal protection body, and the seal protection body is corresponding to the middle part of the U-shaped end of the pushing rod. The contact points of the switch provided by the invention are isolated from atmosphere, contact oxidation invalidity is avoided, and the service life of the switch is prolonged so as to meet the automobile using requirements; and the switch is suitable for various different automobiles.

The invention provides an intelligent emergency lamp for nuclear environment. The intelligent emergency lamp comprises a casing, a liner assembly, a lamp holder, an indicator lamp light passing assembly, a handle, a support plate, a wire inlet mouth, a wire outlet mouth and a circuit device, wherein the liner assembly mainly includes a liner, a rubber sealing strip, a storage battery protection cover, and a circuit board protection cover; the casing and the liner form a double-layer protection structure; the lamp holder and the handle are fixedly mounted on the support plate; the indicator lamp light passing assembly and the wire inlet mouth are mounted on the casing and the liner; and the circuit device is mounted in the liner. The circuit device includes an illuminating lamp, an on-off power supply, a storage battery, an alarm, a test button, an indicator lamp and a circuit board, wherein the an intelligent control circuit is arranged on the circuit board; and the circuit device can provide continuous emergency lighting for 8 hours or more through the illuminating lamp when the normal lighting is interrupted. The intelligent emergency lamp provided by the invention is resistant to impact, voltage, radiation, shake, moisture, and corrosion, has high on-off switching speed, and is convenient in detection and test by using a combined test button.

The invention discloses a knittable full-carbon memory storage device, a preparation method therefor, and an application. The storage device comprises carbon nano tube fibers wrapped by acidic thermal reduction graphene, and an electrode. The preparation method comprises the steps: taking oxidized graphene as a raw material, forming acidic oxidized graphene aqueous solution through adjusting a pH value, wrapping the surfaces of flexible carbon nano tube fibers with the oxidized graphene through employing a method of solution immersion, carrying out the reduction of the oxidized graphene through thermal treatment, weaving the obtained functional carbon nano tube fibers in an intersected manner, connecting an upper electrode, and forming the storage device. The storage device provided by the invention is high in switch ratio, is high in switching speed, is long in switch service life, is good in flexibility, is easy to machine and form various types of braided fabrics, is especially suitable to serve as wearable electronic equipment, and is simple in manufacturing technology. The raw material is easy to obtain, and the device is simple. Moreover, the device is low in cost, and is suitable for large-scale production.

The invention provides a control method of a novel medium and high-voltage power distribution network controller. The method includes the specific steps of enabling a controller to perform system feedback according to electric signals; receiving discharge switch 15V closing pulse signals transmitted from a fast controller, when a discharge switch is determined to be closed about 10-15 ms later and the voltage at both ends of a capacitor is detected to be zero, issuing a closing instruction to a bypass switch one closing time earlier, and after the bypass switch is determined to be closed, issuing a discharge switch opening instruction; when the line current exceeds 10 A and after a bypass switch energy-storage capacitor is completely charged delayed 2 minutes later, issuing a bypass switch opening instruction; when the instantaneous value of the line current exceeds 1.459 A for 0.4 ms continuously, immediately starting an 'exit system' operation.

The invention discloses a control switch based on a magnetic liquid first-order buoyancy principle, and belongs to the field of mechanical engineering. The device comprises insulated magnetic liquid,an insulating container, a plurality of conducting balls, static contact pieces, a magnetic field unit and a circuit part, wherein the static contact pieces comprise a left static contact piece and aright static contact piece; and the conducting balls comprise a left conducting ball, a right conducting ball, a middle conducting ball group and a compensating conducting ball group. Through the adoption of the control switch based on the magnetic liquid first-order buoyancy principle, the on and off of the switch are controlled by applying the magnetic field unit, and the wearing capacity of thestatic contact pieces is compensated automatically by the conducting balls through buoyancy, so that the switch-on reliability of the switch is strengthened greatly, and the service life of the switch is prolonged. The control switch based on the magnetic liquid first-order buoyancy principle disclosed by the invention has the advantages of novel structure, convenient control, stable performanceand the like, and a new choice is provided for controlling circuit on-off equipment.

The invention relates to a load knife switch for a direct current circuit and belongs to the application field of direct current circuits. The load knife switch consists of two sets of knife switchesin series, and the breaking times of the two sets of knife switches are different. A group of knife switches which are first cut off are connected in parallel with a module, which has the functions ofcontrolling the knife switch to cross zero cut off and low-voltage cut off. When the knife switch which is first cut off is cut off, the knife switch which is later cut off has the function of automatic cut-off, so that the knife switch which is later cut off has no arc cut-off. The invention realizes the long service life of the DC load knife switch.

The invention discloses a high-current direct-current switch for a surface treatment production line, which comprises an anode heat dissipation confluence copper plate, an aluminum radiator, a PCB (Printed Circuit Board), a cathode confluence copper plate, a cathode confluence copper plate mounting piece and a high-power packaging MOS (Metal Oxide Semiconductor) tube, the PCB is connected with the negative electrode confluence copper plate through the negative electrode copper sheet installation piece, the positive electrode heat dissipation confluence copper plate is arranged on the other side of the high-power packaging MOS tube, and the aluminum radiator is fixedly installed on the other side face, opposite to the high-power packaging MOS tube, of the positive electrode heat dissipation confluence copper plate. The invention has the beneficial effects that a large-current switch control effect is realized by connecting a plurality of high-power MOS tubes in parallel, and meanwhile, the drain heat dissipation surfaces of the MOS tubes are tightly combined with the positive heat dissipation confluence copper plate through a low-temperature tin soldering process, so that the thermal resistance value and the resistance value at a welding and attaching part are reduced; therefore, the large-current direct-current switch has the advantages of accurate control on the conduction time and longer switch service life.

An on-load voltage and capacitance regulation transformer comprises a tap switch and other components. The tap switch is composed of three operating mechanisms, three capacitance regulation switches and two voltage regulation switches. Each operating mechanism is provided with a bistable permanent magnet assembly and a poking rod of the bistable permanent magnet assembly. Each switch comprises a sealed vacuum insulating cylinder. All switching surfaces of movable contact pieces and static contact pieces are located inside vacuum cylinder cavities of the insulating cylinders. The width of the switching surfaces of the high-voltage side static contact pieces in the three capacitance regulation switches is smaller than the width of the switching surfaces of the low-voltage side static contact pieces in the three capacitance regulation switches. Due to the fact that the switching surfaces of the movable and static contact pieces are located inside the vacuum cylinder cavities, the on-load voltage and capacitance regulation transformer has the advantages that arc extinguishing performance is reliable, the service life is long and transformer oil is not polluted by electric arcs; in addition, after the technology that a high-voltage winding and a low-voltage winding are cut off in sequence, and the low-voltage winding and the high-voltage winding are connected in sequence is adopted, the small electric arcs are obtained, residual magnetism inside an iron core of the transformer is eliminated, inrush current and overvoltage formed when the high-voltage winding is connected again are avoided, and the voltage fluctuation amplitude in the switching process is effectively reduced.

The invention discloses a high-speed switch type superconducting current-limiting transformer and a working method thereof. The superconducting current-limiting transformer comprises a low-temperature Dewar, a high-voltage winding, a low-voltage winding, a leading-out terminal of a superconducting winding, a first high-speed switch, a second high-speed switch and a third high-speed switch, the high-voltage winding and the low-voltage winding are soaked in the cooling liquid in the low-temperature Dewar flask and are led out through the lead-out taps; each phase of the low-voltage winding is divided into a main through-flow winding and a main current-limiting winding, the main through-flow winding is connected in series with a first high-speed switch through a leading-out tap, the main current-limiting winding is connected in series with a second high-speed switch through a leading-out tap, and the main through-flow winding and a branch where the main current-limiting winding is located are connected in parallel; the low-voltage winding is provided with a group of mutually insulated leading-out terminals at intervals; and the third quick switch is arranged in an upper gas area of the Dewar and is connected with a leading-out terminal or a neutral gear of the low-voltage winding. Under a short-circuit fault, the length of the superconducting tape cut off when the first quick switch is switched off is changed through the action of the third quick switch, the current-limiting impedance of the superconducting winding is increased, and variable-impedance current limiting is realized.

The invention discloses a circuit breaker phase control suppression method for operating overvoltage of a transmission line, which is characterized in that the circuit breaker is turned on or off at the best phase angle of a reference signal to suppress the line side operating overvoltage; specifically comprising: Through the control unit, the accurate zero-crossing point of the voltage is obtained as the time reference for control, combined with the time when the dielectric recovery strength drops to α times the system power supply voltage level and the delay time of the circuit breaker command operation (α>1), calculate the time reference point and The delay time for a certain phase to issue a closing command, and at the same time, according to the three-phase electrical characteristics of the power grid, calculate the delay time for closing the other two-phase circuit breakers. The invention solves the technical problem of how to suppress the operating overvoltage at the line side by obtaining the optimal phase angle of the control switch in the reference signal, and closing or breaking at the phase angle.

The invention belongs to a vacuum circuit breaker field and especially relates to a disc-type overlapping gyromagnetic vacuum arc extinguish chamber. The vacuum arc extinguish chamber comprises: a conducting rod (1), a contact cup bottom (2) and a contact cup (3). The contact cup bottom (2), the contact cup (3) and the conducting rod (1) are successively matched. The contact cup (3) is provided with an iron core (7) which is equipped with winding slots (6) with equal intervals. Coil windings (8) are placed in the winding slots (6). The coil windings (8), which are distributed along a radial direction and are in a radiation shape, form a disc structure. A contact blade (4) is fixedly arranged on an end of the contact cup bottom (2). More than two groups of the coaxial coil windings (8) are stacked into the winding slots (6) and the coaxial coil windings are staggered with a certain angle theta. According to the invention, a transverse magnetic field can be provided and simultaneously a vertical magnetic field effect can be generated. Using the chamber of the invention helps the loss of the arc energy. The arc can be cooled quickly. An insulating property is good. A breaking capacity is good. Installation and maintenance is convenient. Operation reliability is high.

The invention provides a circuit breaker capable of automatically calibrating closing force, and the circuit breaker comprises a processor, an opening driver, an opening actuator, a closing driver, a closing actuator, a zero-cross detection circuit, a release and a voltage acquisition circuit, wherein the opening driver is respectively connected with the processor and the opening actuator; the switch-on driver is connected with the switch-on actuator and the processor; the zero cross detection circuit, the voltage acquisition circuit and the release are all connected with the processor, the switch-off actuator and the switch-on actuator are connected with a zero line of alternating current power supply voltage, and the switch-off driver and the switch-on driver are connected with a live line of the alternating current power supply voltage. The technical problems of short service life and low reliability of automatic opening and closing in the prior art are solved.

The invention provides a circuit breaker with automatic zero-crossing switching, which comprises a processor, an opening driver, an opening actuator, a closing driver, a closing actuator, a zero-crossing detection circuit and a release, and is characterized in that the opening driver is respectively connected with the processor and the opening actuator, the closing driver is respectively connected with the closing actuator and the processor, and the zero-crossing detection circuit is connected with the processor. The zero cross detection circuit and the release are both connected with the processor, the opening actuator and the closing actuator are connected with a zero line of alternating current power supply voltage, and the opening driver and the closing driver are connected with a live line of the alternating current power supply voltage. The technical problems that in the prior art, a circuit breaker is large in size, low in execution speed and low in reliability are solved.

The invention discloses a capacitive micromechanical switch used in a microelectromechanical system, which comprises: a semiconductor substrate, on which a bridge pier, a coplanar waveguide signal line, a ground plane and a flat membrane beam are arranged; An insulating dielectric layer is provided on the coplanar waveguide signal line below the beam, and concave gaps are provided at both ends of the flat membrane beam, and the pier is connected to the notch end of the flat membrane beam through a "T"-shaped support beam. The present invention utilizes the support beam of "T" shape structure to reduce the equivalent elastic coefficient of the flat membrane beam, and at the same time releases the residual stress in the beam to achieve the purpose of stepping down the threshold voltage of the switch, so the present invention has a low threshold and a long switch life advantages; and since the switch structure adopted in the present invention can be manufactured by a planar manufacturing process, the present invention can simplify the manufacturing process.

The invention discloses a cruciform single-pole triple-throw switch. A main structure of the switch consists of a substrate, microwave transmission lines, drive electrodes, an upper electrode, a lower electrode, fixed anchor points and air bridges. The microwave transmission lines and the drive electrodes are arranged on the substrate. The upper electrode is a T-shaped straight-plate-type structure. Single, double and triple contacts with elastic beams are used in the lower electrode. In an aspect of mechanics, impact force generated by the upper electrode, which is in rapid pull-down caused by the action of electrostatic force, on the lower electrode can be reduced, a cushioning effect is provided, and thus the contacts and the upper electrode are protected; and in an aspect of electricity, effective contacting can be enhanced, and ablation and adhesion due to weak contacting are avoided. When drive voltage is applied to the first drive electrode, the upper electrode under the action of the electrostatic force is pulled down to contact the contacts, the switch is currently in a conduction state, the upper electrode above the second drive electrode is tilted, an isolation degree of the switch is increased, self-actuation between the upper and lower electrodes is prevented, and the switch life and the microwave performance are also enhanced at the same time.

The invention discloses a hidden circuit knob switch device of a lamp and a control mode thereof. The lamp comprises a lamp body and a lamp holder assembly, the lamp holder assembly comprises a lampshade assembly and a lamp panel, the lampshade assembly comprises a lampshade body and a lampshade base, and the lampshade base is rotationally connected with the lamp body; the lamp panel is fixed at the bottom end of the lampshade base, the side face of the lampshade base is exposed, the lamp panel forms the bottom face of the lampshade base, a first electrode is arranged at the bottom of the lamp panel, a plurality of second electrodes are arranged on the side edge of the lamp panel, and the first electrode and the second electrodes are connected with a positive electrode and a negative electrode of a control circuit of the lamp panel and used for controlling on or off of a lamp panel circuit. The hidden circuit knob switch device has the advantages that the lamp is turned on and off by rotating the lamp holder, a brand-new switching mode is achieved, and the hidden circuit knob switch device has the advantages of being simple in structure and long in switch service life.

The invention relates to an automobile interior lamp based on a capacitive touch switch. A shell is detachably installed on a lampshade. A reflecting mirror arranged between the lampshade and the shell is divided into two reading lamp reflecting areas and two backlight reflecting areas along the center line in the length direction, a circuit board with reading LEDs and backlight LEDs is vertically installed on the back of the reflecting mirror, switch panels with markers are installed in backlight lampshades on the two sides of the lampshade, light guide plates with the capacitive sensors on the upper portions are installed on the upper portions of the switch panels, the light emitting faces of the backlight LEDs are opposite to light guide posts vertically arranged on the light guide plates, the capacitive sensors are connected with the circuit board through flexible flat cables, and the backlight lampshades are touched to control the corresponding reading LEDs to be turned on and off. According to the automobile interior lamp, the structure is reasonable, the switch service life can be prolonged by arranging the capacitive sensors in the lampshades, the markers on the switch panels can be displayed through backlight sources, operation is convenient and accurate, reading LEDs are controlled to be turned on and off, and installation and maintenance are convenient.