714 results about "Electrical isolation" patented technology

The invention provides a direct-current group charging control system and a power switching method thereof, and relates to the technical field of electric vehicle charging, and the control system comprises a data interaction controller, a charging module group, a switch module group, a plurality of charging terminals, a direct-current loop module and a direct-current loop controller. According to the method, a data interaction controller controls a switch module group to realize'full matrix 'type dynamic connection between any charging module and any charging terminal according to the real-time requirement of each terminal, and an idle terminal is electrically isolated by combining a direct current loop module; and power switching is carried out by adopting safety strategies such as double-threshold hysteresis control, voltage pre-synchronization and zero-current breaking. According to the invention, the problems of inflexible power scheduling and insufficient idle terminal safety of the existing group charging system are solved, safe, efficient, stable and dynamic distribution of the charging power in a global range is realized, and the utilization rate and the operation safety of the system are improved.

The invention discloses a vehicle-mounted CAN bus anti-interference communication system and method based on photocoupling, and the system comprises an anti-interference communication system frame, the anti-interference communication system frame comprises a CAN bus receiving and transmitting module, a photocoupling isolation module, and a signal processing and separating module, the CAN bus receiving and transmitting module is used for receiving and transmitting CAN bus signals, and the photocoupling isolation module is used for receiving and transmitting the CAN bus signals. The photoelectric coupling isolation module is used for realizing transparent conversion of data between an optical signal and an electric signal and realizing electrical isolation of a physical layer while maintaining the integrity of a CAN protocol, and the signal processing and separation module is used for constructing a cooperative processing mechanism of time sequence calibration, differential judgment, logic reconstruction and signal synthesis. According to the invention, based on a physical layer signal isolation mechanism of optoelectronic isolation, a bidirectional independent transmission path of a CAN bus TXD / RXD channel data stream is established, and TXD mapping data and CAN bus effective data in an RXD channel are accurately separated, so that the system reliability in an industrial-grade communication scene can be obviously improved.

The invention discloses a thermal management hierarchical linkage safety control method for an energy storage loop, and relates to the technical field of safety control of an electric energy storage system, and the method comprises the steps: an energy storage loop control system continuously and synchronously monitors a multi-dimensional operation state parameter set of an energy storage battery plug-in box in a battery module in the energy storage loop, the method comprises the following steps: constructing an operation feature vector of an energy storage battery subrack, performing correlation analysis processing on the operation feature vector to obtain abnormal state judgment information, performing abnormal state evolution analysis on the operation feature vector according to the abnormal state judgment information to obtain a thermal runaway risk identifier, and performing hierarchical coordination control on a battery module. And after the hierarchical coordination control is executed, continuously monitoring the operation feature vector, generating an out-of-control signal of the battery module, then executing electrical isolation processing on an energy storage loop corresponding to the battery module, and executing directional immersion processing according to the active fire-fighting logic after the electrical isolation processing is executed. The thermal runaway diffusion probability is effectively reduced, and the overall operation safety of the energy storage system is improved.

The invention discloses a CAN bus activity detection and wake-up circuit and method, and belongs to the technical field of CAN bus communication, the CAN bus activity detection and wake-up circuit comprises a CAN bus interface circuit, a signal detection and processing circuit and a controller, the input end of the CAN bus interface circuit is connected with a CAN bus; the signal detecting and processing circuit comprises a voltage comparator, the non-inverting input end and the inverting input end of the voltage comparator respectively receive a CANH signal and a CANL signal which are electrically isolated by the CAN bus interface circuit, and the output end of the voltage comparator is connected to a wake-up pin of the controller; the controller is used for monitoring the level state of the wake-up pin, and when the level of the wake-up pin is in an effective state, the electronic equipment is controlled to be switched from the sleep mode to the normal working mode. By introducing an electrical isolation and voltage difference detection mechanism, the problem of false wake-up caused by common-mode interference or bus noise in the prior art is solved, and reliable wake-up under low power consumption is realized.

The invention discloses a time interference double-target electrical stimulation system, which comprises a signal generation unit used for generating multiple paths of carrier signals and adjusting the frequency, amplitude and / or phase of the carrier signals; the current output unit is used for converting the multiple paths of carrier signals into multiple paths of carrier currents, and electrical isolation and intermodulation suppression are provided between the multiple paths of carrier currents; the electrode unit is electrically connected with the current output unit and comprises a plurality of electrodes and a position subunit, the plurality of electrodes are used for receiving the multi-channel carrier current so as to discharge in an attached target area, and the position subunit is used for determining the attaching position of each electrode; and the control unit is used for controlling the discharge of the plurality of electrodes, detecting the impedance and carrier current at the plurality of electrodes to assist the position subunit in determining the fitting position and detecting the frequency and / or phase of the plurality of carrier current to control the signal generation unit to adjust the frequency and / or phase of each path of carrier signal. The system realizes independent stimulation of two target spots in a hardware-level time interference mode, has signal output with high stability and low mutual interference, and can perform real-time feedback regulation and safety protection.

The invention provides an intermediate-frequency electrotherapy waveform control method and device, electronic equipment and a medium, and the method comprises the steps: determining a treatment waveform signal at the current moment according to a treatment parameter set by a user and an adjustment signal at the current moment, and enabling the adjustment signal to be used for adjusting the amplitude of the treatment waveform signal; determining a treatment current generated after performing power amplification and electrical isolation on the treatment waveform signal at the current moment, outputting the treatment current to a treatment electrode through an electrical isolation circuit, and simultaneously collecting a current signal flowing through the treatment electrode so as to extract a characteristic value representing the magnitude of the output current from the current signal; and determining an adjusting signal at the next moment according to the characteristic value and the target current value. According to the invention, the treatment current acting on the human body can be kept constant under the conditions of load impedance change and complex modulation, the fluctuation and overshoot of the output current are effectively avoided, the treatment somatosensory and safety are optimized, and the overall precision and response speed of system control are improved at the same time.

The invention relates to the technical field of electric switches, in particular to an electric disconnecting switch interlocked with a pole-mounted circuit breaker and a control method thereof, and the method comprises the steps: obtaining standard coil current data, actual coil current data, main loop three-phase current data, power side voltage data and load side voltage data, and carrying out the preprocessing; determining time division points by using the wave crest and wave trough distribution characteristics so as to divide stage intervals; the health coefficient of the pole-mounted circuit breaker is obtained through stage interval similarity analysis; calculating an electrical isolation coefficient by combining the main loop current level difference and the bilateral voltage amplitude phase difference; and performing hierarchical interlocking control on the electric isolation switch based on the health coefficient and the electrical isolation coefficient. According to the invention, a two-dimensional evaluation system of mechanism health pre-judgment and electrical isolation hard criteria is constructed through multi-source data fusion, and the safety and reliability of distribution network operation are improved through a hierarchical interlocking control strategy.

The disclosure relates to a semiconductor die with a semiconductor body. The semiconductor die includes: a vertical transistor device with a first load region and a second load region at opposite sides of the semiconductor body; an additional transistor device with a source region at a first side of the semiconductor body, a gate trench, a body region aside the gate trench, and a drain region below the body region; an electrical isolation in the semiconductor body; and a vertical contact element extending from the first side into the semiconductor body. The electrical isolation is arranged laterally between the vertical transistor device and the additional transistor device. The vertical contact element makes electrical contact to the drain region of the additional transistor device and connects the drain region to the first side of the semiconductor body.

The invention relates to the technical field of switching power supplies, and discloses a gallium nitride charger based on a 494 PWM chip, which comprises a power panel, a rectification circuit module, a half-bridge gallium nitride driving module, a transformer, a 494 chip control module, a totem pole driving module, an isolation driving transformer, a full-wave rectification module, a filter circuit module and a conversion circuit module, the core is that the 494 chip control module generates a PWM signal, and the PWM signal sequentially passes through the totem pole driving module for current amplification and the isolation driving transformer for electrical isolation and signal coupling to drive the two gallium nitride transistors in the half-bridge topology for high-frequency alternate switching. According to the invention, the high-speed switching characteristic of the gallium nitride device is fully exerted, and the charger can work at a higher frequency, thereby reducing the switching loss, reducing the size of a magnetic element, and achieving the high power density and high overall conversion efficiency while improving the power level to a kilowatt level.

In a method of manufacturing a semiconductor device a fin structure is formed in which first semiconductor layers and second semiconductor layers are alternately stacked over a substrate. A sacrificial gate structure is formed over the fin structure. A source / drain region of the fin structure that is not covered by the sacrificial gate structure is etched to form a source / drain space. An isolation region is formed at a bottom portion of the source / drain space. A source / drain epitaxial layer is formed over the isolation region in the source / drain space, and a void region in the isolation region is produced between the source / drain epitaxial layer and the substrate to cause electrical isolation between the source / drain region and the substrate.

The present application provides a temperature measuring device comprising: a metal housing comprising a first metal portion and a second metal portion, the second metal portion having a tip for insertion into a food; an intermediate electrical isolation portion for connecting the first metal portion and the second metal portion, the intermediate electrical isolation portion being configured to electrically isolate the first metal portion and the second metal portion when the first metal portion and the second metal portion are connected to the intermediate electrical isolation portion; the circuit board unit is at least located in the second metal part, and the circuit board unit is connected with an antenna unit; wherein the first metal portion and the second metal portion serve as electrodes of the temperature measurement device, respectively, and the first metal portion serves as a part of an antenna unit of the temperature measurement device.

The embodiment of the invention provides a three-dimensional semiconductor memory which comprises a substrate, a plurality of active layers located on the substrate and arranged on the substrate in an array mode, a plurality of bit lines connected to one ends of the active layers respectively, extending in the second direction and stacked on the substrate in the third direction, and a plurality of memory units arranged on the substrate in a stacked mode. The plurality of bit lines are respectively connected to the other end of the active layer, the shielding structure comprises a main body part and a plurality of shielding parts, the shielding parts extend along the second direction, the main body part and the shielding parts are made of conductive materials, the main body part is electrically connected with the shielding parts, and at least one shielding part is arranged between adjacent bit lines along the third direction. In the embodiment of the invention, the shielding part is formed between the stacked bit lines, the shielding part is electrically connected to the main body part, and the main body part is connected to the fixed potential end, so that the electrical isolation between the stacked bit lines is realized, the parasitic capacitance between the bit lines is reduced, and the electrical performance of the stacked device is improved.

The invention discloses a high-frequency high-voltage power supply system, and relates to the technical field of high-frequency high-voltage power supplies. An energy conversion assembly in the high-frequency high-voltage power supply system is used for converting input alternating current into high-voltage electric energy; the energy conversion assembly is arranged in the insulating part, and the insulating part is used for electrically isolating the energy conversion assembly; the detection device is arranged in the insulating part and is adjacent to the energy conversion assembly; the detection device is used for detecting parameters of the energy conversion assembly; the control device is connected with the energy conversion assembly and the detection device, and the control device is configured to regulate and control working parameters of the energy conversion assembly based on at least one of the temperature parameter, the current parameter and the voltage parameter. By applying the high-frequency high-voltage power supply system disclosed by the invention, a closed-loop control system for controlling and adjusting based on the detection result can be constructed, the adjusting capability of the high-frequency high-voltage power supply system is improved, the problems caused by partial discharge or local temperature rise are reduced, the stability of the system is improved, and the service life of the system is prolonged.

The utility model belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing, which comprises an external powder blocking module and a dynamic sealing module, the external powder blocking module consists of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate, the first powder blocking plate is fixed at the top of a plasma gun body to form an arc-shaped shielding surface, and the dynamic sealing module is fixed at the top of the plasma gun body. The powder retaining ring coaxially sleeves the positive electrode of the plasma gun body and forms an annular gap type powder blocking structure with the insulating powder retaining plate; the dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the utility model has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

A method of reducing leakage current from a patient to a ground potential through an applied part of a medical device includes defining a maximum permissible leakage current Amax from the patient to the ground potential when the patient is energized to an electric potential V and supplying the medical device with water having a resistivity value ρ through a fluid line having a length L and an inner diameter ID. The value of L and ID is selected to cause the fluid conduit filled with water of resistivity ρ to have a resistance of R high enough to maintain the leakage current from the patient to the ground potential below Amax.

The present invention concerns a laminated glass, comprising first and second glass sheets and a ply of interlayer material therebetween; a heating element arranged on a surface of the second glass sheet adjacent the ply of interlayer material; a circumference of the heating element spaced from an edge of the second glass sheet forming a circumferential region between the circumference and the edge of the second glass sheet where conductive material of the heating element has been at least partly removed; a conductive ring configured in the circumferential region spaced from the circumference and spaced from the edge of the second glass sheet and electrically isolated from the heating element wherein conductive materials of the heating element and the conductive ring are different.

The utility model provides a voltage sampling circuit based on electric field coupling and a radio frequency matcher. The voltage sampling circuit based on electric field coupling comprises a voltage sampling probe and an adjustable voltage dividing unit. The voltage sampling probe is used for acquiring a high-frequency high-voltage signal output by the radio frequency matcher through electric field coupling based on a distributed capacitor formed by the voltage sampling probe and sampling points of the radio frequency matcher, and outputting the acquired high-frequency high-voltage signal to the adjustable voltage dividing unit; and the adjustable voltage division unit is used for performing voltage division on the high-frequency and high-voltage signal by using the adjusted voltage division multiple after being triggered and adjusted, and outputting the high-frequency and high-voltage signal after voltage division to the processing module. According to the utility model, based on a distributed capacitor formed by the voltage sampling probe and the sampling points of the radio frequency matcher, an output voltage signal is obtained through electric field coupling, voltage sampling with electrical isolation is realized, and the problem of long installation and debugging time of the voltage sampling probe and the radio frequency matcher is solved by adjusting the voltage division multiple of the adjustable voltage division unit.

The embodiment of the present specification provides a synchronization trigger system and method for a pulse wind tunnel, the system comprising: a signal trigger module, a light source control module and a device control module; the signal trigger module is used for receiving a reference signal; the sending device and the receiving device for the reference signal are electrically isolated based on a circuit structure; the reference value of a trigger signal is set according to the isolated reference signal; whether the light source and the device are turned on or not is indicated according to the trigger signal and the reference value; the light source control module is used for controlling the flicker frequency of the light source based on a MOSFET and a triode; the device control module is used for controlling the start and stop of the device according to a preset delay. The technical scheme provided in the present application is used to solve the problem that the risks among the sub-circuits are related to each other and the performance applicability is not strong.

The utility model discloses a four line kelvin measurement accessory of banana head connecting probe, including measuring instrument main part, four banana head jacks are equipped with to measuring instrument main part, four banana heads are inserted respectively in banana head jack, four connecting wires, one end is connected banana head respectively, and the other end is connected corresponding measurement probe, four measurement probes are connected with connecting wire electricity respectively, and are used for contacting the both ends of measured device, the inside of banana head jack is provided with insulating baffle and banana head, and the baffle is used for carrying out electrical isolation to each banana head insertion site, to avoid mutual interference between measurement signal. The utility model discloses adopting probe to replace traditional kelvin clamp structure, and the probe has good flexibility and controllable contact pressure, can realize accurate contact to paster device or surface pin device, and effectively solve the problem of traditional clip clamping difficulty.

The invention discloses a power module and a solid-state transformer, belongs to the field of solid-state transformers, and considers that the power module can be divided into a medium-voltage circuit and a low-voltage circuit, and electric energy required by the low-voltage circuit and the medium-voltage circuit can be uniformly obtained based on low voltage provided externally. Therefore, the low-voltage auxiliary source can supply power to the low-voltage circuit based on the electric energy provided by the system auxiliary power supply, and the medium-voltage auxiliary source obtains the electric energy from the low-voltage auxiliary source in an electrical isolation mode and supplies power to the auxiliary circuit in the medium-voltage circuit, so that the system auxiliary power supply can supply the electric energy to the low-voltage auxiliary source through the low-voltage cable. The level requirement of protection design is reduced, and the cost is reduced; and the medium-voltage auxiliary source and the low-voltage auxiliary source are electrically isolated, so that the system control module can directly send a system control instruction to the low-voltage circuit through a low-cost cable, and the cost is further reduced.

The invention provides a hybrid switch device, and relates to the technical field of electrical equipment. The hybrid switch device comprises a mechanical switch unit, an electronic switch unit, an isolation switch and a protection element. The electronic switch unit and the mechanical switch unit are connected in parallel, the isolation switch is arranged in a loop where the mechanical switch unit is located in parallel and arranged in a loop where the electronic switch unit is located in series, or the isolation switch is arranged in the mechanical switch unit in series and arranged in a loop where the electronic switch unit is located in series; the protection element is connected in parallel with the electronic switch unit; in the switching-on process, the isolating switch, the electronic switch unit and the mechanical switch unit are sequentially switched on, and the electronic switch unit is switched off; and in the opening process, the electronic switch unit is closed, and the mechanical switch unit, the electronic switch unit and the isolating switch are sequentially disconnected, so that the isolating switch ensures the electrical isolation safety, and the reliability, controllability and connection layout rationality of the hybrid switching device are improved.

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 utility model provides an insulating shockproof foot, include: including shockproof foot body, shockproof foot body has opposite first end and second end, the first end surface has insulating material and is used for installing in equipment ground pin to prevent the first end with the equipment ground pin interval forms the conductive path, the second end is used for installing fixedly to shockproof foot body. The utility model discloses through using insulating material on the first end surface, and insulating material has high resistivity, can effectively prevent the current through, namely effectively blocked the current conduction between equipment ground pin and shockproof foot, reached the effect of electrical isolation, make the current unable to flow through shockproof foot to the ground, avoided equipment secondary grounding phenomenon, thereby avoided the influence equipment's work performance.

The application relates to the technical field of electrical connection, in particular to a wiring module and an electrical isolation switch, which comprises a module main body, a common conductive assembly and first and second wiring terminals arranged on the two sides of the module main body respectively. The first wiring terminal comprises an elastic assembly which can press the first external conductor against the common conductive assembly to form an electrical connection. The structure of the second wiring terminal can be combined with that of the first wiring terminal in multiple ways according to actual requirements. The application adopts the elastic assembly for wiring on at least one side, thereby simplifying the wiring operation and improving the installation efficiency. Meanwhile, the continuous pressing force provided by the elastic assembly helps to improve the long-term reliability of the connection. The modular different terminal combinations enhance the application flexibility and market compatibility of the product.

Active semiconductor devices in an integrated circuit are provided lateral electrical isolation by surrounding narrow deep trench isolation regions that are merged at shared portions of the narrow deep trench isolation regions. A wide deep trench isolation region laterally surrounds the merged narrow deep trench isolation regions.

This invention discloses a plug-in independent power supply hybrid power system for aircraft, which can be installed in situ without altering the original aircraft's core structure. The system employs an external independent power battery module, a small-power engine generator, and a small battery module to form a "three-level independent redundant power architecture," with each unit's power supply circuit electrically isolated from the others. The external independent power battery only charges on the ground and discharges unidirectionally during flight, without energy recovery or reverse charging. It only replaces all functions of the flight control system and electronic control system when the engine and small battery fail. The small-power engine does not participate in takeoff and climb, but is dedicated to cruise power supply. The small battery is responsible for powering the flight control system, electronic control system, and engine starter, sharing a high-voltage DC bus with the generator to achieve bus voltage stabilization and short-term power compensation. Ground charging simultaneously performs a full system self-check. When the battery power is insufficient or the test fails, there is no manual bypass, and the electronic control system is forcibly locked, prohibiting engine starting and ensuring absolute flight safety.

The invention provides an anti-electric-shock and dustproof low-voltage branch box, and relates to the technical field of low-voltage power distribution equipment, the anti-electric-shock and dustproof low-voltage branch box comprises a box body, a box door and a box cover, the box body comprises an outer-layer insulation shell, an inner-layer insulation shell and an interlayer, and the interior of the box body is divided into a branch box main body cavity, an electrical isolation cavity, a heat dissipation and dust removal channel and an independent wire duct cavity; a wiring terminal set, an insulation positioning frame, an adjustable supporting column, an electric leakage detection module and a grounding terminal are fixed in the branch box body cavity, a power controller and an airflow dustproof assembly are arranged in the electrical isolation cavity, the upper end and the lower end of the heat dissipation and dust removal channel correspond to the airflow dustproof assembly and the diversion opening and closing mechanism, and the box door is provided with an electromagnetic lock and a wire groove plugging plate. The beneficial effects of the invention are that the double-layer insulation structure is combined with the electric leakage detection module to realize linkage of electric leakage, power failure and door locking, so that the anti-electric shock safety is improved; through the sealing design of the active airflow barrier and the multi-stage filter screen, the synergistic interaction of dust prevention and heat dissipation is realized, the maintenance cost is reduced by a modularized convenient structure, and the reliability and the practicability are greatly improved.

1. Name of the product in this design: Transformer. 2. Purpose of this design: It is used for voltage conversion, electrical isolation and voltage stabilization of equipment to ensure the stable and safe operation of small electrical circuits. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

This invention belongs to the field of arc heater technology and discloses a testing device and method for testing the arc spot position and rotation speed of an arc heater. During the test, a wireless data acquisition device, powered by a battery, is installed on the high-voltage rear electrode of the arc heater. The wireless data acquisition device is electrically isolated from other components and the ground. Several thermocouples are installed at equal intervals along the axis on the cathode wall of the inner shell of the electrode. The thermocouple wires are connected to the wireless data acquisition device through a cooling channel. After acquiring the temperature value, the wireless data acquisition device transmits it to the wireless AP in the test hall via a wireless transmitter, and then to the industrial control computer. Based on the obtained temperature value, the operator determines the axial coordinate of the arc spot, determines the rotation speed of the arc spot, calculates the heat flux value of the arc spot, and captures motion images of the arc spot. The testing device and method provide data support for the control of the arc spot position and rotation speed of the arc heater, thereby improving electrode lifespan and reducing the operating cost of the arc heater.

The invention provides an electronic wire harness anti-interference optimization method and system, and the method comprises the steps: S2, blocking a DC component and low-frequency interference through employing a band elimination filter according to the initial spectrum distribution, and extracting a core frequency band of high-frequency signal transmission from a filtered signal; s4, acquiring demand data of voltage grade separation from the signal output, designing an electrical isolation layer through a multi-layer shielding structure, and determining isolation boundaries among different voltage grades; s5, according to the isolation boundary, a space optimization algorithm is adopted to adjust wire harness arrangement in the compact layout, and structural parameters considering isolation and coupling balance are obtained; and S8, according to the final scheme, a time domain reflection method is adopted to detect the distortion rate in signal transmission, the actual effect of improving the anti-interference capability is judged from the detection result, and optimized operation parameters are obtained. The anti-interference capability and the signal transmission quality of the electronic wire harness in a complex electromagnetic environment are effectively improved.