108 results about "Electrically short" patented technology

A thermosensitive wire includes a pair of conductive wires each covered with an insulator that softens at a preset temperature, and the pair of conductive wires are configured to come into contact with each other to be short-circuited in response to the insulator softening. A power supply system includes: a second power source configured to supply power to the pair of conductive wires; a short circuit detector configured to detect that the pair of conductive wires are short-circuited; a disconnection detector configured to detect that the pair of conductive wires are disconnected; and a controller configured to perform, for power supply to a power supply wire, abnormality control that differs between in the case where the short circuit detector detects that the pair of conductive wires are short-circuited and in the case where the disconnection detector detects that the pair of conductive wires are disconnected.

A substrate includes a core layer and one or more metallization layers. The core layer provides stabilization to the substrate to reduce or avoid warpage. The core layer may include a glass material weaved throughout the core to provide stabilization and avoid warpage. A metallization layer adjacent to the core layer in the substate includes an insulation layer and the embedded metal structure(s) that is positioned from the core layer. The thickness of the insulation layer is greater than the embedded metal structure so that a surface of the embedded metal structure is positioned at least at a length from the surface of the glass material. This can avoid or reduce the risk of the embedded metal structure electrically shorting to another metal structure in the substrate through the core layer.

The invention discloses an electric leakage self-checking method based on a residual current protection circuit breaker, and the method comprises the following steps: S1, obtaining a self-checking instruction through an MCU controller in the circuit breaker, and driving a simulation electric leakage circuit to generate a simulation electric leakage signal according to the self-checking instruction; s2, collecting a plurality of analog electric leakage signals in real time through a zero sequence mutual inductor in the circuit breaker, and processing the electric leakage signals to obtain a plurality of sampling voltages; and S3, preprocessing the plurality of sampling voltages to obtain an average sampling voltage, comparing the average sampling voltage with a preset voltage threshold to obtain a comparison result, controlling the running state of the release by the MCU controller according to the comparison result, recording a self-checking result, and outputting the self-checking result. The residual current protection circuit breaker is used for solving the problems that an existing residual current protection circuit breaker lacks a necessary electric leakage self-checking method, faults are prone to occurring in the using process, and the risks of electric leakage, short circuit and even human electric shock exist.

The invention discloses a charging pile with a multi-mode charging function, and particularly relates to the technical field of charging piles, the charging pile comprises a multi-mode charging pile, protective shells are fixedly installed outside charging gun bins on the two sides of the multi-mode charging pile, and the protective shells are arranged on the two sides of the multi-mode charging pile respectively; two mounting frames are fixedly mounted on the side, close to the multi-mode charging pile, of the protective shell, cable storage and standard wiring are achieved through cooperation of the protective shell and the telescopic corrugated pipe, the protective shell shields a cable body, the telescopic corrugated pipe wraps the exposed part, external environment erosion is doubly blocked, and the service life of the multi-mode charging pile is prolonged. The corrugated pipe can be flexibly adjusted along with stretching and retracting of the cable, the cable length requirements in different use scenes are met, the physical damage risk caused by long-term exposure of the cable is reduced, the safety of the charging process is guaranteed, potential safety hazards such as electric leakage and short circuit caused by cable damage can be reduced, and the system reliability is improved.

The invention relates to the technical field of ultra-wideband antennas, and discloses an ultra-wideband wide-angle scanning tight coupling antenna and array, and the antenna comprises an impedance matching layer, an antenna radiation layer, an antenna supporting layer and a metal floor which are stacked from top to bottom. The impedance matching layer comprises three layers of eccentric cross-shaped dielectric plates, and the first eccentric cross-shaped dielectric plate at the top layer and the second eccentric cross-shaped dielectric plate at the middle layer are provided with circular grooves at the intersection center position of the two groups of orthogonal dipoles; the antenna radiation layer is provided with two groups of orthogonally arranged unequal-width pentagonal dipoles; the antenna supporting layer is provided with two groups of feed short circuit columns and two groups of metal rib belts; and the metal floor is provided with a two-section stepped feed through hole. According to the invention, the scanning range is expanded under the condition of ensuring good matching.

An electro acoustic resonator is provided. The resonator has a gap short structure (GSS) to electrically short at least an area of the transversal gap to suppress transversal gap mode excitations. The gap short structure may be provided by a conductive stripe in the gap and parallel to or inclined with respect to the bus bar (BB) shorting adjacent IDT fingers. Additional connectors between the stripe and the bus bar may be provided. The connectors may have different pitch or metallization ratio with respect to the ID fingers. The connectors may be offset from the position of the fingers and my be inclined with respect to the bus bars. Multiple parallel stripes in the gap may provide a transversal reflector. By using a gap short structure a further improved transversal mode suppression of piston mode designs can be achieved.

Aspects disclosed include an integrated circuit (IC) package including two substrates and vertical interconnects coupling the two substrates, the vertical interconnects comprising a metal ball and metal pin combination to address an increased distance between substrates. The vertical interconnects are disposed in a mold layer between the two substrates. The mold layer also includes a die, a plurality of metal pins, and a plurality of metal balls coupled to the plurality of metal pins to form the vertical interconnects. Larger distances between the two substrates are desirable when a die's thickness is increased to increase thermal dissipation from the die. As an example, by utilizing a plurality of metal ball and pin combinations as vertical interconnects, larger distances between the two substrates may be advantageously achieved with reduced risk of electrical shorting between vertical interconnects and without compromising pitch between vertical interconnects.

The invention provides a comprehensive control method for reactive power support and fault ride-through in offshore wind power short-circuit fault, which comprises the following steps of: performing common-mode injection calculation: obtaining a circulating current reference value (izxref, respectively adding a PR controller in each phase to control feedback circulating current (izx to change along with the (izxref, and outputting a result Uzx to an MMC converter by the PR controller; and determining an optimal phase angle difference: introducing a phase angle control variable lambda, and searching the phase angle difference of alternating current components in the voltage of the upper bridge arm and the lower bridge arm, so that the non-fault pole bridge arm transmits half rated power, the fault pole bridge arm does not transmit active power, but reactive power can be provided for a power grid. According to the method, under the condition that the circulating current flowing through the MMC system bridge arms and the submodule capacitor voltage fluctuation can be effectively restrained during the offshore wind power short-circuit fault, the upper bridge arm and the lower bridge arm reach power balance through the phase angle control variable, and fault ride-through and reactive power support during the offshore wind power short-circuit fault are achieved.

The invention belongs to the technical field of energy storage systems, and particularly relates to a battery PACK and an energy storage system. The battery PACK comprises a battery management unit BMU and a plurality of battery cells, each battery cell is integrated with a wireless communication module, the battery management unit is also integrated with a wireless communication module, and each battery cell and the battery management unit BMU perform wireless communication by using the respective wireless communication module. The method has the advantages that hardware such as cables, connectors and wire ducts is omitted, and the cost advantage is remarkable especially in a large-scale system; when part of battery modules are offline due to faults or newly added modules are accessed, a wireless communication network can automatically reconstruct a topological structure to ensure the stability of a communication link, and a wired system needs to manually adjust the wiring topology; wireless communication does not need electrical connection, electrical isolation between the battery pack and the BMU is naturally achieved, and the risks of electric leakage and short circuit in a high-voltage system are reduced.

The invention provides a flexible direct-current transmission short-circuit current control strategy multi-objective optimization solving method, which specifically comprises the following steps of: 1, constructing a receiving end fault two-port model, and solving parallel fault transition impedance in a receiving end power grid fault model; step 2, in combination with parallel fault transition impedance, deriving a minimum reactive current reference value constraint required by AC voltage support in a fault period and an active current constraint allowed by DC side energy balance and DC voltage upper limit; and step 3, obtaining the short-circuit current safety domain under the three-phase short-circuit fault by combining the minimum reactive current required for reducing the voltage drop when the short-circuit fault occurs, the active current which can be provided by the receiving-end converter station MMC and the amplitude constraint condition of the short-circuit current output by the receiving-end converter station MMC. According to the invention, adaptive analysis and optimization are carried out on an existing short-circuit current control strategy, and it is ensured that the optimized control strategy not only can reduce unbalanced power accumulation, but also can be used for supporting alternating-current power grid voltage through reserved capacity.

A method and apparatus are disclosed for an integrated circuit having a high voltage tub including a buried layer of a first conductivity type formed in a substrate of a second conductivity type, a central region of the first conductivity type formed in the substrate in contact with the buried layer, a first floating isolation trench formed in the substrate to surround the central region and to extend down to and surround the buried layer, a second floating isolation trench formed in the substrate around the first isolation trench, a shallow ring region of the first conductivity type formed in the substrate between the first floating isolation trench and the second floating isolation trench, a first conductive interconnect structure for electrically shorting the central region to the shallow ring region, and a second conductive interconnect structure for electrically shorting the first floating isolation trench to the second floating isolation trench.

This invention discloses an extrusion molding device for producing insulated cables, belonging to the technical field of cable production equipment. The proposed solution includes a base and a wire feeding mechanism located on one side of the top of the base for automatically feeding insulated cables. An extrusion molding mechanism is located on the top of the base. This invention not only ensures consistent insulation layer thickness and a smooth surface through the circumferential smoothing design of the scraper in the extrusion molding mechanism, effectively guaranteeing the insulation performance of the cable and reducing safety hazards such as leakage and short circuits caused by uneven insulation layer thickness, but also avoids waste of raw materials caused by unusable solidified residual insulation material through cleaning of the molding chamber's inner wall, reducing insulation material loss. Furthermore, the use of "circumferential spraying + water-cooled liquid circulation" can quickly reduce the insulation layer temperature to the setting temperature, preventing deformation and uneven shrinkage of the insulation layer due to slow cooling, further ensuring the appearance and structural stability of the cable.

This invention proposes a multi-objective optimization solution method for short-circuit current control strategy in flexible DC transmission, specifically including: Step 1, constructing a two-port model of the receiving-end fault and solving for the parallel fault transition impedance in the receiving-end grid fault model; Step 2, combining the parallel fault transition impedance, deriving the minimum reactive current reference value constraint required to support AC voltage during the fault, and the active current constraint allowed by the DC side energy balance and DC voltage upper limit; Step 3, combining the minimum reactive current required to reduce voltage drop during a short-circuit fault, the active current that the receiving-end converter station MMC can provide, and the short-circuit current amplitude constraint condition output by the receiving-end converter station MMC, obtaining the short-circuit current safety domain under three-phase short-circuit faults. This invention adaptively analyzes and optimizes existing short-circuit current control strategies, ensuring that the optimized control strategy can both reduce unbalanced power accumulation and support AC grid voltage through reserved capacity.

The application discloses a power supply management method of a storage system and electronic equipment, relates to the technical field of storage systems, and comprises the following steps: if the power supply state of a power supply unit of the storage system is an abnormal state, the fan rotating speed is reduced; if the power supply unit recovers to a normal state within a first preset time period after the abnormal state, if the power supply state of a hard disk module is an abnormal state, the enable signal of a voltage regulating power supply and the enable signal of a first electronic fuse of the hard disk module are reset, the power supply unit is used for supplying power for the storage system, and the fan rotating speed is recovered; the power supply unit supplies power for the voltage regulating power supply through the first electronic fuse; the voltage regulating power supply is configured in a power supply short-circuit abnormal permanent protection mode, and the first electronic fuse is configured in an overcurrent short-circuit abnormal self-locking permanent protection mode. The power supply link recovery mode in the related art reduces the reliability of the storage system, and the technical effect of improving the reliability of the storage system is achieved.

A semiconductor device wherein a selected subset of bond wires is coated with an electrically insulating polymer to reduce occurrences of electrical shorts caused by wire sweep in the flow of a molding compound during an encapsulation stage of the manufacturing process. In some examples, the bond wires to be coated are selected based on a set of criteria that flag the bond wires exhibiting a relatively high tendency towards forming such electrical shorts. A specialized wire-bonding tool that can be operated to produce both polymer-coated bond wires and bare bond wires is also provided.

The utility model provides a cable bridge corner branching device which comprises a corner wire duct and a branching mechanism, cables are separately arranged and placed through a wire hole plate, the problems of cable winding or electric leakage, short circuit and the like are prevented, and the cables are separately arranged and placed through a layered floor and a vertical partition plate. The sectioned cover plates are convenient for electric power personnel to open to place, install, maintain and inspect the cable, a certain dustproof effect and physical protection are provided, the perforated connecting side plates are arranged in the clamping grooves in the two sides of the corner wire duct, and the corner wire duct and the perforated connecting side plates are provided with round holes with the same diameter, so that the corner wire duct and the perforated connecting side plates are connected through the round holes. Two groups of bridges can be connected through the connecting screws and the opening connecting side plates, the connecting freedom degree of the bridges is improved, the length of a cable current transmission line is increased, the side face of the cross arm hanging bracket is vertically provided with a plurality of groups of round holes for installing support clamping plates, and cable bridges of different heights and sizes can be vertically combined and placed conveniently.

1. The name of the design product: air switch. 2. The use of the design product: used for closing, carrying and breaking circuit, and providing current leakage and short circuit protection for circuit. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

A substrate includes a core layer and one or more metallization layers. The core layer provides stabilization to the substrate to reduce or avoid warpage. The core layer may include a glass material weaved throughout the core to provide stabilization and avoid warpage. A metallization layer adjacent to the core layer in the substate includes an insulation layer and the embedded metal structure(s) that is positioned from the core layer. The thickness of the insulation layer is greater than the embedded metal structure so that a surface of the embedded metal structure is positioned at least at a length from the surface of the glass material. This can avoid or reduce the risk of the embedded metal structure electrically shorting to another metal structure in the substrate through the core layer.

To provide a piezoelectric actuator with a strain gauge capable of compensating the influence of temperature change.SOLUTION: A driving part 111 in which a plurality of piezoelectric ceramic layers 113 and a plurality of internal electrodes 115 and 116 are alternately stacked and which is driven when a voltage is applied to the internal electrodes 115 and 116, and a plurality of second piezoelectric ceramic layers 114 and a plurality of second internal electrodes 117 and 118 which are formed in series in a stacking direction of the driving part 111 and are alternately stacked, A piezoelectric actuator 100 includes a piezoelectric actuator body 105 including a non-driving portion 112 that is not driven even when a voltage is applied, a strain gauge 131 that is connected to a driving portion 111 and detects strain in a displacement direction of the driving portion 111, and a second strain gauge 132 that is connected to the non-driving portion 112 and detects strain in the displacement direction of the non-driving portion 112, in which a second piezoelectric ceramic layer 114 is polarized, and second internal electrodes 117 and 118 are electrically short-circuited.SELECTED DRAWING: Figure 1

A cable termination that helps prevent unwanted, inadvertent electrical shorting between a signal conductor and a cable ground shield, cable serve shield, or cable reference shield of a cable, such as a coaxial or twin axial cable.

The invention provides a strong and weak current automatic plugging connection device, which comprises a frame, a floating device, an explosion-proof connector, a guide pin and an explosion-proof junction box, and is characterized in that the floating device is mounted at the top end of the frame; the anti-explosion connector is installed in the middle of the front face of the floating device, and the guide pins are symmetrically installed on the two sides of the anti-explosion connector. And the explosion-proof junction box is arranged on the side surface of the frame. According to the device, through automatic accurate control, the connection reliability is improved, the device is suitable for various complex assembling scenes and narrow operation spaces, and the problems that traditional manual plugging is low in positioning precision and unstable in force control, contact pins are prone to being damaged or poor in contact, strong current short circuit is caused, and weak current signals are lost are effectively solved.

The present invention discloses a cable branch box that prevents rainwater from penetrating, and the present invention relates to the technical field of electrical equipment, including a box mechanism. The cable branch box that prevents rainwater from penetrating is designed with a box mechanism. When external wind enters the box, the fiberboard is blown to shake appropriately with the wind, and the temperature inside the box rises during operation. When air enters the box and contacts the internal temperature, water vapor is easily generated to form condensation. The fiberboard is made of plant fiber material and has good water absorption, so as to achieve the effect of absorbing water vapor, prevent condensation, avoid equipment from being corroded, reduce the service life and reliability of the equipment, avoid reducing the insulation performance, and increase the risk of leakage, short circuit and other faults. By opening fiber grooves, the slot design can enhance the stability and reliability of the overall structure to a certain extent, and improve the service life of the equipment.

The invention provides an insulating flame-retardant power cable, and relates to the field of power cables. The insulating flame-retardant power cable comprises a conductor, an insulating protection layer is arranged on the outer wall of the conductor, the insulating protection layer comprises a rubber layer and a shielding layer which are sequentially arranged on the outer wall of the conductor in a sleeving mode, an insulating flame-retardant layer is arranged on the outer wall of the insulating protection layer, and the insulating flame-retardant layer comprises a high-temperature-resistant layer. A plurality of cavities are formed in the high-temperature-resistant layer, and flame-retardant dust is arranged in the cavities. According to the power cable, flame spreading can be effectively prevented through the multi-layer flame-retardant design of the power cable, so that the fire risk is reduced, the safety when the power cable is used in a high-temperature and inflammable environment is improved, higher electrical insulation performance is provided through combination of multiple layers of insulating materials, electrical faults such as electric leakage and short circuit can be effectively prevented, and the service life of the power cable is prolonged. Therefore, the safety of equipment and personnel is guaranteed, and the use safety of the power cable is improved.

1. The name of the design product: underground cable tracer (NF-829). 2. The use of the design product: for detecting the direction of underground cable, power failure, short circuit point. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: kit 1 perspective view 1. 5. Kit description: kit 1 is a detection signal transmitter, and kit 2 is a detection signal receiver.

A system and method for improved noise performance of an audio amplifier are provided. In one example, the system includes a multi-stage amplifier including at least a first stage amplifier and a second stage amplifier. The system also includes a plurality of switches disposed within the multi-stage amplifier to configure the multi-stage amplifier. The system also includes a control signal configured to control the multi-stage amplifier to a normal amplification mode or a mute state, wherein the multi-stage amplifier is adapted to amplify an input signal in the normal amplification mode, the multi-stage amplifier is adapted to output a zero signal in the mute state, and an internal amplification stage of the multi-stage amplifier is disabled in the mute state, and an output stage of each of at least the first stage amplifier and the second stage amplifier is electrically shorted and / or shorted to a fixed bias voltage in the mute state.

The invention provides a composite short-circuit current control strategy for an offshore wind power short-circuit fault, and the strategy comprises the steps: forbidding an integral term of outer ring PI control, and coordinating the distribution of reactive power and active power to dynamically adjust an inner ring voltage reference value. And when a serious short-circuit fault occurs in the flexible DC power transmission system, freezing the integrator controlled by PI, retaining the current value of the integral term, and continuing to use the proportional term to maintain the response. In order to maintain voltage stability and reduce voltage difference of driving short-circuit current, on the basis of known active power and reactive power feasible regions, reactive power and active power distribution should adopt a reactive power priority strategy to increase voltage recovery capability, accelerate fault recovery and guarantee system safety. According to the invention, the short-circuit current during the short-circuit fault of the offshore wind power flexible direct-current power transmission system is reduced.

The application discloses a three-dimensional implantable MIMO antenna for biological telemetry, which is suitable for capsule endoscopy and leadless pacemaker. The system is composed of four antenna units, each unit including a radiation patch, a ground plane, a feed port and a short circuit structure. The symmetric topology of the radiation patch and the strategic layout of the feed / short circuit needles realize self-decoupling, which can effectively reduce the mutual coupling without external decoupling elements. The antenna can work stably at 1.3975 GHz and 2.45 GHz frequency bands, and keep good reflection coefficient, gain and radiation pattern under different tissue environments and implantation depth changes. SAR evaluation shows that it meets the IEEE C95.1-2019 standard, ensuring safety. The three-dimensional structure provides multi-directional radiation diversity, realizing isotropic coverage and robust communication. High-speed telemetry experiments show that it can support up to 100 Mbps data transmission within 10-15 m, which is suitable for complex environments such as continuous motion, attitude change and deep implantation, realizing robust communication and efficient energy transmission.

This utility model discloses an indoor power distribution cable wall-penetrating protective installation device, relating to the field of wire installation technology. The device includes a first protective arc plate and a second protective arc plate. The first protective arc plate is hinged to the second protective arc plate. The second protective arc plate has a fixing structure and an adjustment structure, which is located on the first protective arc plate. This device, through the first and second protective arc plates and the first and second telescopic arc plates, forms a complete circular tube structure, completely enclosing the wall-penetrating cable and isolating it from the sharp edges of the wall. Even with long-term use, it effectively protects the cable insulation layer, preventing dangerous situations such as leakage and short circuits. The protective sleeve is fixed by gaskets and locking nuts, allowing for flexible adjustment of the overall length of the protective device to ensure a tight fit to walls of different thicknesses, further improving the ease of installation.

Some implementations include an apparatus configured to, in a wellbore, eliminate voltage on one or more first conductors that are electrically connected to a surface-based power source. The apparatus may include a shorting ring electrically connectable to the first conductors and configured to electrically short the first conductors upon establishing an electrical connection with the first conductors. The apparatus may include a solenoid assembly to actuate in response to power on the first conductors from the surface-based power source. The apparatus may include a pin slider assembly connected to the first conductors and configured to move, in response to actuation by the solenoid assembly, between an electrical connection with the shorting ring and an electrical connection with one or more second conductors that have an electrical connection with a permanent magnet motor winding in the wellbore.

An electro acoustic resonator is provided. The resonator has a gap short structure (GSS) to electrically short at least an area of the transversal gap to suppress transversal gap mode excitations. The gap short structure may be provided by a conductive stripe in the gap and parallel to or inclined with respect to the bus bar (BB) shorting adjacent IDT fingers. Additional connectors between the stripe and the bus bar may be provided. The connectors may have different pitch or metallization ratio with respect to the ID fingers. The connectors may be offset from the position of the fingers and my be inclined with respect to the bus bars. Multiple parallel stripes in the gap may provide a transversal reflector. By using a gap short structure a further improved transversal mode suppression of piston mode designs can be achieved.