454 results about "Electrical protection" patented technology

The invention relates to a reverse polarity protected electronic circuit with a negative and a positive supply voltage line and with an electrical application circuit. The electrical application circuit has a positive and a negative power supply terminal. The reverse polarity protected electronic circuit comprises a reverse polarity protection circuit (1). The reverse polarity protection circuit (1) has a first and a second N-channel enhancement transistor as part of a reverse polarity protection transistor group (17). The first and second N-channel enhancement transistors are electrically connected in anti-series via a center terminal (86) of the reverse polarity protection circuit (1). The reverse polarity protection circuit (1) includes a control device (4) which is connected to the positive and negative supply voltage lines.Only when connected with the correct polarity does the control device (4) switch the first and second N-channel enhancement transistors of the reverse polarity protection transistor group (17) on. The control device (4) includes its own additional control reverse polarity protection circuit (81) which prevents damage to the control device (4) if connected with incorrect polarity, so that the control device (4) does not switch on the first and second N-channel enhancement transistors if connected with incorrect polarity.

The invention relates to a reverse polarity protected electronic circuit with a negative and a positive supply voltage line and with an electrical application circuit. The electrical application circuit has a positive and a negative power supply terminal. The reverse polarity protected electronic circuit comprises a reverse polarity protection circuit (1). The reverse polarity protection circuit (1) has a first and a second N-channel enhancement transistor as part of a reverse polarity protection transistor group (17). The first and second N-channel enhancement transistors are electrically connected in anti-series via a center terminal (86) of the reverse polarity protection circuit (1). The reverse polarity protection circuit (1) includes a control device (4) which is connected to the positive and negative supply voltage lines.Only when connected with the correct polarity does the control device (4) switch the first and second N-channel enhancement transistors of the reverse polarity protection transistor group (17) on. The control device (4) includes its own additional control reverse polarity protection circuit (81) which prevents damage to the control device (4) if connected with incorrect polarity, so that the control device (4) does not switch on the first and second N-channel enhancement transistors if connected with incorrect polarity.

The invention provides a high-reliability high-density three-dimensional integrated multichannel millimeter wave transceiving integrated radio frequency micro module, which adopts three-dimensional ceramic packaging as a packaging body and comprises an amplitude-phase unit and a transceiving unit, and the two units and a cover plate realize electrical vertical interconnection and airtight packaging through three-dimensional stacking. The micro module receives an input signal, the input signal enters a receiving channel after being selected by a switch, an amplitude-limiting low-noise chipset in the micro module carries out amplitude-limiting amplification on the received signal, then the received signal is output to an amplitude-phase multifunctional chip, and the received signal is synthesized and output after amplitude-phase adjustment and amplification. A transmitting input signal is input to the amplitude-phase multifunctional chip after being subjected to power division, is subjected to power amplification after being subjected to amplitude-phase adjustment and amplification, is selected by the transmitting-receiving switch, and is radiated and output through the antenna. A negative electricity protection circuit and a pulse modulation circuit are integrated in the micro module, and pulse control of transmitting and receiving work of the micro module is achieved. The micro module adopts a stepped heat dissipation technology of the chip, the substrate, the functional unit and the micro module, and has very strong practicability.

The utility model discloses an umbrella-shaped electrical protective sleeve, and particularly relates to the field of electrical protective sleeves, the umbrella-shaped electrical protective sleeve comprises two protective clamping plates, the two ends of the protective clamping plates are symmetrically and fixedly connected with limiting ring plates, the two sides of the two ends of the protective clamping plates are symmetrically and fixedly connected with fastening screw plates, and the middle parts of the fastening screw plates are provided with clamping grooves; a clamping column is arranged in the middle of the fastening screw plate, and the two ends of the clamping column are symmetrically and fixedly connected with anti-skid clamping plates. According to the utility model, the protective clamping plates are clamped to clamp and protect the connection part of an electrical element or a cable, and the telescopic pipe is telescopically moved by pulling the annular plate, so that the protection length can be adjusted, and adjustment and use can be conveniently carried out according to needs; the connecting position of the telescopic pipe and the protective clamping plate is heated and wrapped through the thermoplastic umbrella cover, the connecting protective effect of the telescopic pipe and the protective clamping plate is improved, the connecting strength of the telescopic pipe and the protective clamping plate is improved through the connecting ring, the use effect is improved, and adjustment, installation and use are convenient.

An electrical protection device capable of operating without auxiliary electrical power supply includes a control module configured to detect an electrical fault and a switching module, a first circuit including at least two normally-on JFET transistors and a switching member including a first contact. The switching module is configured so that, upon a switchover of the first contact when the current circuits, an electric arc is formed and so that the appearance of the electric arc generates an electrical signal transmitted to at least one of the transistors, the electrical signal driving the switching of the transistor.

The invention relates to the technical field of electrical protection, and discloses an electrical equipment protection device with a fault early warning function, which comprises a shell, a circuit board, a sensor group, an alarm component, a main control unit, an early warning execution module and a protection execution module. A cover plate with a visible glass window is arranged in front of the shell, and a display and control buttons are arranged on the circuit board. The sensor group collects operation parameters of electrical equipment, and the main control unit compares a preset threshold value, analyzes historical data, identifies abnormity, predicts fault risks and generates an early warning or protection instruction. And the early warning execution module triggers sound-light alarm and remote communication according to the instruction, and the protection execution module executes operations such as power failure. The electrical equipment protection device with the fault early warning function has the advantages that the operation parameters of the electrical equipment are monitored in real time, the advanced fault analysis algorithm is used for carrying out risk pre-judgment, and an early warning and protection mechanism is triggered in time.

The invention relates to the technical field of electrical protection devices, in particular to a service life early warning method and system for a surge protection device, and the method comprises the steps: carrying out the leakage current detection of the surge protection device, and recording the change condition of the detected leakage current as A; performing temperature detection on the surge protection device, and recording the detected temperature value as T; carrying out temperature detection on the environment where the surge protection device is located; when A is smaller than A1 and / or T is smaller than T1, the service life early warning grade is low; when A1 is smaller than or equal to Alt; a2 and / or when T1 is smaller than or equal to Tlt; t2 and Tgt; when t1, the service life early warning grade is middle; when A2 is less than or equal to Alt; a3 and / or when T2 is less than or equal to Tlt; t3 and Tgt; when t2, the service life early warning grade is high; when A > = A3 and / or when T > = T3 and Tgt; when t3, the service life is judged to be invalid; a3gt; a2gt; a1, T3gt; t2gt; t1, t3gt; t2gt; t2gt; t1. Therefore, the service life condition of the SPD is judged by detecting the leakage current, the temperature and the environment temperature of the SPD, and an accurate service life early warning level is given.

The invention relates to the technical field of electrical safety protection devices, in particular to a branching buckle type new energy fuse. The fuse comprises a tube body which is provided with a through accommodating space; the branching buckle assembly comprises a first branching buckle and a second branching buckle which are embedded into the two ends of the pipe body respectively; the fuse assembly comprises a plurality of fuse parts and supporting parts which are in one-to-one correspondence, the fuse parts are wound on the supporting parts and penetrate through the accommodating space, and the two ends of the fuse parts and the two ends of the supporting parts are fixed to the first branching buckle and the second branching buckle together; and the end cap assemblies are arranged at the two ends of the pipe body in a sleeving manner so as to cover the first branching buckle and the second branching buckle. According to the invention, the arc energy is shared by designing a plurality of fuse pieces, the overall performance and stability of the fuse can be improved, and a reliable electrical protection effect is realized.

The invention belongs to the technical field of power supply and distribution of a data center, and provides an electrical protection method and system for power supply and distribution of the data center, aiming at the data center of a 2N power distribution architecture, electric energy parameters of two paths of external mains supply are collected and transmitted to an EMS of an energy storage system, and system charging and discharging power is controlled and adjusted through the EMS. According to the fact that the sum of the power on the two alternating current buses is larger than a set protection threshold value, the first switch device is controlled to cut off the connection between the energy storage system and the second alternating current bus, overload of a superior line or a transformer during charging or power supply switching is prevented, and in addition, through the measures of a reverse power detection device, first-path voltage loss linkage and the like, the energy storage system can be effectively protected. An external electrical protection system independent of the energy storage system is added to form dual protection, so that a dual fault superposition scene of energy storage system faults or power grid faults is effectively isolated, and the reliability of an originally designed power supply network of the data center is guaranteed.

A self-healing battery pack includes a plurality of battery modules connected in series. When a faulty battery module is detected, an electrical protective device connected in parallel with the faulty battery is caused to operate and thereby bypass the faulty battery module. The self-healing battery pack can additionally report the detection of the faulty battery module. When maintenance is scheduled to replace the faulty battery module, the self-healing battery pack can receive instructions to adjust a state-of-charge of the battery modules to reduce an equalization period.

The utility model relates to the technical field of electrical protection devices, in particular to a surge protection device with a temporary overvoltage protection function, which comprises a piezoresistor assembly, an inductor and a switch assembly, the piezoresistor assembly is connected with the switch assembly in parallel, and two ends of the inductor are respectively connected with the piezoresistor assembly and the switch assembly. The switch assembly comprises a conduction switch, a combination switch, a resistor R1 and a capacitor, the conduction switch is in linkage connection with the combination switch, the conduction switch is connected with the capacitor in series, the resistor R1 is connected with the combination switch and the inductor in series, and one end, away from the conduction switch, of the capacitor is connected with the combination switch and the piezoresistor assembly; when the conduction switch is closed and the capacitor is fully charged, the combination switch is conducted. By means of the arrangement, the surge protection device can be prevented from being damaged by impact when overvoltage occurs; when surge voltage occurs, the surge protection device can effectively discharge the surge voltage, and the safety of electric equipment is protected.

The present invention relates to a method of controlling an electrical protection device. When an electrical fault of the short-circuit type is detected during a step b) and when the tripping energy is greater than or equal to the tripping energy threshold in step d), controlling (S118) each switching module to enter the off-configuration. When the reclosing time of the given circuit breaker has elapsed, controlling (S122) each switching module to enter the on-configuration. If a circuit breaker is connected immediately upstream of the given circuit breaker, a test duration (T1) has not elapsed and a short-circuit is detected, performing steps c) to f) again; and if no circuit-breaker is connected immediately upstream of the given circuit-breaker, the test duration (T1) has not elapsed and a short-circuit is detected, controlling (S138) each switching module in the off-configuration.

An inductive sensor is integrated on a printed circuit board assembly (PCBA) of an electrical protective device, such that the inductive sensor is configured to contactlessly measure angular motion of an electrically conductive target mounted on the PCBA corresponding to a component of the electrical protective device. The inductive sensor comprises an integrated circuit, a transmitter coil, and receiver coils spaced apart vertically from the electrically conductive target. The integrated circuit is electrically coupled to the transmitter coil such that the integrated circuit is configured to transmit a high frequency time varying signal into the transmitter coil. The high frequency time varying signal energizes the transmitter coil thereby inducing a magnetic field. The magnetic field induces one or more output signals on the receiver coils and eddy currents in the electrically conductive target. The eddy currents produce a counter magnetic field that alters the output signals responsive to an angular displacement of the electrically conductive target.

An electrical protection device, including a movable contact, connected to an electrical circuit, a switching handle, and an electronic control unit. The device further includes an electrical link element, connecting the movable contact and the electronic control unit, a switch, a mechanical link element, connected to the switching handle. The electronic control unit is configured to measure the first voltage and the second voltage, compare the first voltage and the second voltage to determine the cause of opening of the electrical circuit among manual opening and fault opening, send a first signal if the cause of opening is manual opening and send a second and / or third signal if the cause of opening is fault opening.

The invention relates to the technical field of electrical protection devices, in particular to an intelligent surge protection device, which comprises a remote control tripping module, a leakage current detection module, a temperature detection module and a voltage detection module, and is characterized in that the leakage current detection module, the temperature detection module and the voltage detection module are all connected with the remote control tripping module; when the leakage current detection module detects that the leakage current of the intelligent surge protection device reaches a set threshold value and is maintained for a preset time, the remote control tripping module carries out tripping coil processing; when the temperature detection module detects that the temperature of the intelligent surge protection device reaches a threshold value, the remote control tripping module carries out tripping coil processing; when the voltage detection module detects that the overvoltage of the intelligent surge protection device reaches a set threshold value and is maintained for a certain time, the remote control tripping module carries out tripping coil processing. According to the arrangement, various parameter conditions of the SPD are detected online in real time, remote control tripping actions are made in time, and real-time detection, pre-judgment in advance, tripping protection in advance and fault prevention are achieved.

The invention relates to a high-voltage electrical system (1) for a motor vehicle, comprising: - an electric drive unit (2) with a first high-voltage component in the form of a high-voltage energy storage device (4) and at least one second high-voltage component in the form of a permanently excited electric machine (5a, 5b), wherein the high-voltage components have live parts at least temporarily even in the event of an accident involving the motor vehicle, - at least one auxiliary consumer (3) electrically connected to the electric drive unit (2), - a first protective device (10) for providing an electrical protective measure for the at least one secondary consumer (3), which, in the event of an accident, is designed to separate the at least one secondary consumer (3) from the electric drive unit (2) to prevent the feeding of a voltage induced by the permanent magnet electric machine (5a, 5b) and to discharge it to allow an accident-related mechanical deformation, and - a second protective device (14) for providing a mechanical protective measure for the electric drive unit (2), which is designed to absorb an accident-related force applied to the electric drive unit (2) in order to prevent an accident-related mechanical deformation of the high-voltage components.

The utility model relates to the technical field of electrical protection equipment, and discloses a lightning arrester convenient to assemble and disassemble, a fixing device is composed of a base, a bidirectional threaded rod, a fixed rod, a sliding block, a threaded block, a connecting block, an arc-shaped block, a fixed cylinder, a movable rod, an annular block, a fixed block, a spring and a limiting block, and the two-way threaded rod is rotationally mounted in the base. According to the lightning arrester convenient to mount and dismount, by pulling and rotating a moving rod, a fixed block can enter an arc-shaped groove, the moving rod can be limited, a lightning arrester main body is placed at the top of a connecting block, a bidirectional threaded rod is driven by a rotating handle to rotate, the arc-shaped block can basically limit the lightning arrester main body, the moving rod is rotated, and the lightning arrester main body can be conveniently mounted and dismounted. And under the action of the spring, the fixing block is separated from the arc-shaped groove and enters the sliding groove, so that the limiting block can limit the lightning arrester main body, the fixing effect is good, and the lightning arrester main bodies with different specifications can be fixed.

The utility model discloses a kind of insulation parts of power equipment convenient to install, belong to electrical protection technical field, it includes insulating cover, the insulating cover one side is rotatably connected with insulating baffle by pin shaft, the insulating baffle top is fixedly installed with clamping strip, the insulating cover top one side is fixedly installed with mounting seat, the inside middle fixed mounting of mounting seat is with partition. The insulation part of power equipment convenient to install, two clamping plates are separated from clamping strip, so that insulating baffle can rotate and separate from insulating cover surface, make the air switch inside insulating cover expose and be adjusted control, again insulating baffle is rotated back to insulating cover surface, repeat the above operation, loosen two sliding plates, so that sliding plate is clamped in clamping strip under the action of reset spring reset springback, make insulating baffle be fixed on insulating cover surface, so that after completing adjustment to air switch, continue to carry out insulating protection to air switch.

The utility model discloses a multifunctional electrical protection box, which belongs to the technical field of electrical protection boxes, and is characterized in that a plurality of groups of sliding plates are arranged between vertical sliding chutes in a sliding manner, and the sliding plates are arranged between the sliding chutes in a sliding manner through sliding blocks; the sliding block is further in threaded connection with a locking bolt, and a plurality of sets of installation plates are arranged on the horizontal sliding groove in a sliding mode. A baffle is arranged in the cold air pipeline, the edge of the air outlet plate is connected with the limiting ring through a first reset spring, and multiple sets of second air holes staggered with the first air holes are formed in the air outlet plate. A moisture absorption pump is further arranged on the back of the electrical box, and a shutter fan capable of being opened automatically is installed at an outlet of the moisture absorption pump. The vertical height of the sliding plate can be freely adjusted, and the horizontal position can be adjusted through the mounting plate and the horizontal sliding groove. The air outlet plate moves along the cold air pipeline under the impact of the cold air, and at the moment, the cold air passes through the first air holes and the second air holes and can quickly cool the electrical box under the cooperation of the fan blades. When the humidity in the electrical box needs to be reduced, the moisture can be quickly discharged out of the box through the moisture absorption pump.

Electrical protection device, distribution assembly, and associated electrical switchgear. This electrical protection device (300), configured to electrically connect an electrical load (M) to an electrical power source (S), includes incoming terminals (302), outgoing terminals (304), and switching means (310) actuated by a bistable actuator (324). A microcontroller (320) is provided to generate a fault signal (S320), which triggers the actuator, and an output signal (S321), which is different from the fault signal. The protection device includes a supervisory circuit (500), which is interposed between the microcontroller (320) and the actuator (324) and which includes an oscillator (510) configured to generate a periodic signal (S510).The monitoring circuit is configured to generate a trigger signal (S324) when, alternatively, the output signal (S321) of the microcontroller (320) is absent, or the periodic signal (S510) of the oscillator (510) is absent, or when a fault signal (S320) is emitted. See Figure 6 for abbreviations.

The invention relates to the technical field of power system automation, in particular to a new energy box-type substation state estimation, regulation and control method, which comprises the following steps of: injecting a multi-frequency electrical excitation signal into a box-type substation, acquiring a voltage signal and a current signal, establishing a digital twin model based on primary wiring topology and grounding grid topology, performing combined state estimation and parameter estimation to obtain a comprehensive feature vector representing a degradation state, and inputting the comprehensive feature vector into a fault diagnosis and life evaluation model to obtain a risk index; and constructing a risk weighting objective function taking active output, reactive output and current as independent variables, and solving to obtain a control quantity vector for adjusting power output, reactive compensation and an electric protection device action constant value, thereby reducing the operation risk and prolonging the service life of equipment while ensuring the grid-connected requirement.

This invention relates to the field of electrical protection technology and discloses a fuse and its manufacturing method. The fuse includes: a tube body; a fusible element disposed inside the tube body; inner caps disposed at both ends of the tube body, with the two ends of the fusible element welded to the inner caps at both ends of the tube body; and an external terminal welded to the inner cap. This invention provides a fuse that allows the external terminal and inner cap to be welded together, reducing the impedance caused by the interference fit assembly method in the prior art, thereby reducing its power consumption while ensuring electrical protection capabilities.

The invention discloses an electric shock protection method and device for an electric TN system, and relates to the field of electrical protection, the electric shock protection device comprises installation grooves formed in the two sides of the lower end of a cover plate and used for fixing an air bag, and one-way valve nozzles communicating with the air bag are fixed to the positions, corresponding to the installation grooves, of the upper end of the cover plate in a penetrating mode; upper sealing strips which abut against the outer half shell in a sealing mode are embedded in the positions, close to side lines, of the two sides of the upper end of the cover plate, and the air bag expands to push the cover plate to longitudinally move so that the upper sealing strips abut against the side walls of the outer half shell; the sealing assembly is used for sealing the periphery of the PE mother board and dividing the PE mother board into a plurality of blocks, and meanwhile the interior of the outer half shell is divided into a plurality of independent sealing spaces. By arranging the sealing assemblies, the interior of the outer half shell can be divided into a plurality of independent spaces, even if one space is corroded due to water leakage, other spaces cannot be affected, then the protection effect of the PE mother board is improved, and meanwhile the situation that the PE mother board is corroded, so that resistance is increased, and the safety protection performance is affected is avoided.

The utility model belongs to the technical field of heat dissipation tools, and particularly relates to a heat dissipation assembly and an electrical protection device, and the heat dissipation assembly comprises a water-cooling heat dissipation unit, a heat conduction unit and a liquid inlet control unit. Wherein a liquid cooling flow channel is arranged in the water cooling heat dissipation unit, a liquid inlet and a liquid outlet are formed in the water cooling heat dissipation unit, and the liquid inlet and the liquid outlet are communicated with the liquid cooling flow channel; the heat conduction unit is attached to the water-cooling heat dissipation unit. The liquid inlet control unit is mounted at the liquid inlet; a to-be-cooled body is placed in the water-cooling heat dissipation unit, so that the to-be-cooled body abuts against the heat conduction unit; the water-cooling heat dissipation unit, the heat conduction unit and the fuse are installed, the liquid inlet control unit is connected with the liquid cooling unit refrigerant medium circulation system and the water-cooling heat dissipation unit, heat is taken away by means of a liquid cooling unit refrigerant medium, the temperature of a fuse melt is reduced, the equipment stability is improved, the structure is simple, the cost is low, and the application range is wide. Rapid cooling of the fuse can be realized in the presence of a liquid cooling unit.

A self-healing battery pack includes a plurality of battery modules connected in series. When a faulty battery module is detected, an electrical protective device connected in parallel with the faulty battery is caused to operate and thereby bypass the faulty battery module. The self-healing battery pack can additionally report the detection of the faulty battery module. When maintenance is scheduled to replace the faulty battery module, the self-healing battery pack can receive instructions to adjust a state-of-charge of the battery modules to reduce an equalization period.

This application provides an electric motor, an electric propulsion device, and an aircraft. The electric motor includes: a stator having a cavity; a rotor rotatably connected to the stator via a shaft; and the rotor being insulated from the stator; a conductive component disposed within the cavity, one end of the conductive component being conductively connected to the shaft, and the other end extending to the outside of the electric motor. The electric motor of this application, by incorporating the conductive component, creates a complete low-impedance electrical path between the shaft and the conductive component, allowing current that might be input into the electric motor via the rotor hub to be output to the outside of the electric motor, thus improving the electrical protection performance of the electric motor.

The invention provides a protection control device for an expansion power generation system of a compression control energy storage power station. The protection control device comprises a control module, a plurality of measuring points arranged on the compression control energy storage power station and valves, the control module is in communication connection with each measuring point and the valve; the control module is used for acquiring measurement data of each measurement point, monitoring feedback signals of a plurality of devices in the compression control energy storage power station, applying a preset protection control strategy and controlling a valve according to the measurement data of each measurement point and the feedback signals of each device, and completing protection control of an expansion power generation system in the compression control energy storage power station. The equipment comprises an electrical protection device, an electrical cabinet, a circulating cooling water system, an expansion generator, a heat release system, a cold storage system, measuring points and valves. The reliability and efficiency of protection control of the expansion power generation system can be improved, the safety and reliability of the compressed air energy storage power station are improved, and the supporting capacity for a power grid is guaranteed.

Electrical protection device, associated electrical installation and control method The present invention relates to an electrical protection device comprising: a mechanical switch; an interruption cell (18) comprising N switching modules (32, 42), N being greater than or equal to 2, each switching module (32, 42) comprising a voltage limiting element (39, 49), each voltage limiting element having a different limiting voltage (Ulim1, Ulim2);a control unit comprising a cell control module (66), configured to control each switching module in the blocked configuration, the limiting voltages, alone and / or summed together, form at least 2N-1 distinct steps, and the cell control module is configured to control in the blocked configuration the switching module(s) whose limiting voltages form a step being the largest step less than or equal to a dielectric withstand of the mechanical switch. Figure for the abbreviation: Figure 2;

The invention relates to the technical field of packaging bodies, in particular to a power module packaging body with a self-protection function, which comprises a heat dissipation substrate, the top of the heat dissipation substrate is in threaded connection with a double-sided crimping substrate, and the middle part of the bottom inner wall of the double-sided crimping substrate is fixedly connected with a power chip set. According to the device, through double-sided cooling, the thermal resistance is obviously reduced, the module is allowed to operate under higher power without triggering over-temperature protection, the output capability is improved, through flexible interconnection and spring pressurization, the main failure mode of fatigue of bonding wires and welding layers is eliminated, the service life of the module is matched with the theoretical service life of a chip, the connection reliability is improved, and the service life of the chip is prolonged. The modular design realizes rapid assembly and automatic modular production, the guide structure provides a stable and reliable working platform for the electrical function, the electrical protection ensures that the mechanical structure is not damaged due to abnormal electrical stress, and the special protection control chip and the driving and soft turn-off circuit perform self-protection.