258 results about "Electrical isolation" patented technology

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.

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 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.

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.

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.

This invention discloses a circuit board processing method and circuit board processing equipment, comprising: processing a first through hole on a multilayer circuit board, the multilayer circuit board including a first solder mask layer and a second solder mask layer respectively disposed on two adjacent circuit boards, the first solder mask layer and the second solder mask layer being disposed opposite to each other, and the first through hole penetrating the first solder mask layer and the second solder mask layer; performing a desmearing process on the multilayer circuit board to form a first space on the first solder mask layer and a second space on the second solder mask layer; depositing a first metal layer on the inner wall of the first through hole, the first space and the second space; removing the first solder mask layer and the second solder mask layer, and electroplating a second metal layer on the first metal layer on the inner wall of the first through hole to obtain a target circuit board including a target metallized hole, so as to completely remove the low-density first metal layer deposited in the first solder mask layer and the second solder mask layer, so as to achieve complete electrical isolation between the two adjacent circuit boards with the first solder mask layer and the second solder mask layer, and achieve zero residual solder.

A multiple inverter generator and operating method thereof. A first inverter generator delivers AC) power through a first power line to a power output and a second inverter generator delivers AC power through a second power line. A low current coupler selectively couples the first power line and the second power line with limited electrical current. A parallel power switch selectively couples the first power line and the second power line. A controller activates, while the parallel power switch electrically isolates the first power line from the second power line, the low current coupler for a synchronization time period to form a limited current electrical connection. The controller also configures, within a time out period after activation of the low current couple for the synchronization time period, the parallel power switch to electrically connect the first power line and the second power line.

This application discloses an energy storage converter and energy storage system, belonging to the field of power electronics technology. The energy storage converter includes: a DC bus; at least one isolated switching power supply circuit, the input terminal of which is electrically connected to the energy storage element, and the output terminal of which is electrically connected to the DC bus; and an inverter unit, the DC side of which is electrically connected to the DC bus, and the AC side of which is electrically connected to the power grid. The inverter unit is configured to convert the DC power transmitted from the DC bus into AC power. When the isolated switching power supply circuit is placed between the energy storage element and the DC bus, high- and low-voltage isolation between the energy storage element and the DC bus can be achieved. Using an isolated switching power supply circuit allows for electrical isolation between high and low voltages while achieving DC-DC conversion, improving the safety of the energy storage converter. Furthermore, only one stage of isolated switching power supply circuit is needed to achieve electrical isolation, resulting in lower cost.

This application relates to the field of electrical connection device technology, and more particularly to a double-break circuit breaker. The double-break circuit breaker provided by this application includes a housing and a contact system and an arc-extinguishing system located within the housing. The arc-extinguishing system includes a first sub-arc-extinguishing structure, a second sub-arc-extinguishing structure, and a partition. The first sub-arc-extinguishing structure is used to extinguish the arc generated when the first stationary contact separates from the first moving contact, and the second sub-arc-extinguishing structure is used to extinguish the arc generated when the second stationary contact separates from the second moving contact. The partition extends from the arc-initiating zone to the arc-extinguishing zone, providing electrical isolation between the first and second sub-arc-extinguishing structures in the arc-initiating and arc-extinguishing zones. Thus, during the arc-extinguishing process, the arc generated by the first contact group and the second contact group is less likely to cross-contact. The first sub-arc-extinguishing structure is only used to extinguish the arc generated by the first contact group, and the second sub-arc-extinguishing structure is only used to extinguish the arc generated by the second contact group, which helps to improve arc-extinguishing efficiency.

This utility model relates to the field of circuit board technology, specifically a circuit board with a moisture-proof structure, including a circuit board body, a mounting frame that fits into the inner wall of a sealed box, a fixed connection between the circuit board body and the mounting frame, fins fixedly connected to the side of the mounting frame facing away from the circuit board body, a thermally conductive pad fixedly connected to the fins, and an insulating pad fixedly connected to the side of the circuit board body near the fins. First, a layer of thermally conductive pad is pasted on the upper surface of the fins, and then the fins are fixed to the outer wall of the mounting frame with screws. An insulating pad is pasted on the back of the circuit board body. The insulating pad can electrically isolate the fins from the circuit board body, ensuring safe and stable circuit operation, and at the same time, the insulating pad can block moisture, thus achieving a moisture-proof effect.

Techniques for forming an integrated circuit with fin isolation structures formed from the back side of the structure. FETs (field-effect transistors) each have semiconductor material extending in a first direction between source and drain regions, and gate structures extending in a second direction around the semiconductor material of each FET. A fin isolation structure can extend along the second direction between the FETs to provide electrical isolation between them. The fin isolation structure can include one or more dielectric materials deposited within a trench formed from the back side of the structure. In one example, an etch stop layer is present over the semiconductor devices, and the backside fin isolation structure can contact a bottom surface of the etch stop layer.The fin insulation structure may exhibit an inverse tapered profile compared to etched features formed on the front side.

The invention relates to a high-sensitivity MEMS flow sensor and a manufacturing method thereof.The high-sensitivity MEMS flow sensor comprises a sensor chip, a metal base and a measuring runner, the sensor chip comprises a substrate, and a porous silicon area is formed in the substrate; the first dielectric layer is formed on the substrate and the upper surface of the porous silicon region; the heating resistor array is formed on the upper surface of the first dielectric layer and is positioned right above the porous silicon region; the thermopile array is formed on the upper surface of the first dielectric layer and located over the porous silicon area, and the thermopile array and the heating resistor array are alternately arranged in the direction of the gas flow channel; the electric isolation layer covers the heating resistor array and the thermopile array; the metal interconnection structure is formed on the upper surface of the electric isolation layer and is connected with the thermopile array; the electrode is connected with the metal interconnection structure; and the second dielectric layer covers the electrical isolation layer and the metal interconnection structure. A multi-pair symmetrical distribution structure in which the thermopiles and the heaters are alternately arranged is adopted, so that the measurement sensitivity of the flowmeter is remarkably improved.

This invention provides a compact high-voltage measuring device and system. By employing at least one pair of high-voltage input terminals, at least one pair of measuring terminals, at least one pair of resistive components, and a voltage measuring circuit fixedly mounted on a substrate, each resistive component has a series circuit consisting of at least one high-resistance resistor and at least one low-resistance resistor, thus reducing the size of the high-resistance and low-resistance resistors. Furthermore, in addition to the voltage measuring circuit, the applied voltage is also distributed across the high-resistance and low-resistance resistors in each resistive component, achieving high-voltage measurement functionality with a compact high- and low-resistance component. This invention provides sufficient electrical isolation between resistors and between resistors and the voltage measuring circuit without increasing the substrate size for mounting the circuit; it reduces the size of the high-resistance and low-resistance resistors, shortens the distances between high-resistance resistors, between low-resistance resistors, and between resistors and the voltage measuring device, and further reduces the substrate size.

This invention discloses a PCS energy storage inverter cabinet, comprising: a cabinet body, an arc-extinguishing circuit breaker, a PCS inverter assembly, and an input busbar assembly and an output busbar assembly fixed inside the cabinet body. A first electrode and a second electrode are fixedly installed on the inner side of the cabinet body, located at both ends of the arc-extinguishing circuit breaker and electrically connected to both ends of the circuit breaker, respectively. Both ends of the PCS inverter assembly are electrically connected to the second electrode and the ends of the output busbar assembly, respectively. The input busbar assembly includes: a first busbar assembly and, sequentially connected to it, an electrical isolation device, an overcurrent protector, and a filter module. In this invention, by setting an arc-extinguishing circuit breaker structure, the contact head and electrode ears deflect under the mechanical pressing action of the circuit pressure rod to engage the electrodes, improving the closing and opening speed and establishing an effective and stable connection. That is, the distance between the contacts increases significantly within the same time frame, and the electric field strength decreases, which helps to establish a strong arc-extinguishing capability in a shorter time.

The application discloses a combined photovoltaic energy storage system, and belongs to the technical field of solar power generation and energy storage. The system comprises a photovoltaic input module, a high-frequency isolation power conversion module, an energy storage battery module, a grid-connected inverter output module and a control module. The high-frequency isolation power conversion module internally comprises a three-winding high-frequency transformer, realizing magnetic coupling power transmission and electrical isolation between three ports of photovoltaic input, energy storage battery and grid-connected output. The three-winding transformer has preset leakage inductance between each winding, and forms LC filter circuits with corresponding capacitors, filtering high-frequency ripples and suppressing harmonics. The control module monitors the state of each module in real time and dynamically adjusts the switching frequency and phase shift angle. The application fundamentally solves the power coupling interference and fault propagation problem in the traditional DC coupling scheme through the three-port high-frequency isolation topology, and has the advantages of high integration, high efficiency and good safety.

A flexible conductive assembly includes a flexible shielded high-current circuit having first and second circuit portions, each with conductive layers and an electromagnetic shield. Contacts are mechanically and electrically coupled to the conductive layers and extend into a connector housing. The housing incorporates electromagnetic shield portions electrically joined to the circuit shields, and a wire seal that protects against environmental ingress while maintaining electrical isolation. By combining flat conductor layers, integrated shielding, and sealed connector structures, the assembly provides a compact, lightweight, and reliable flexible shielded circuit for transmitting high currents with reduced electromagnetic emissions.

The application provides a kind of chip testing device, comprising: base including seat body and installation platform being arranged on seat body, installation platform is used to place chip to be tested;Top cover is movably arranged with base;Test circuit board includes first conductive part, second conductive part and third conductive part, first conductive part, second conductive part and third conductive part are sequentially stacked and are electrically isolated with each other;Probe assembly includes output sub-probe, first input sub-probe and second input sub-probe, output sub-probe is electrically connected with second conductive part, first input sub-probe is electrically connected with first conductive part, second input sub-probe is electrically connected with third conductive part, wherein, second conductive part is used to connect one of positive and negative of power supply, first conductive part and third conductive part are used to connect the other of positive and negative of power supply.The technical scheme of the application can effectively solve the problem of inaccurate detection in related art.

The present disclosure provides a side functional structure for a back contact crystalline silicon solar cell, which is arranged on at least one sidewall of a silicon substrate, and comprises, in sequence from top to bottom, a boron inner diffusion layer, a first silicon oxide layer, a P-type doped polysilicon layer, a borosilicate glass layer, a second silicon oxide layer and an N-type doped polysilicon layer, which are arranged on the surface of the sidewall of the silicon substrate in sequence from top to bottom in the horizontal direction of the crystalline silicon; wherein the reference plane of the region of the sidewall of the silicon substrate where the side functional structure is arranged is higher than the reference plane of a non-side functional structure region which is not provided with the side functional structure; and the non-side functional structure region forms a pyramid light-trapping structure on the surface of the crystalline silicon substrate. The present disclosure also provides a back contact crystalline silicon solar cell having the side functional structure and a preparation method thereof. The side functional structure of the present disclosure can achieve effective electrical isolation between the P region and the N region, thereby reducing the risk of side short circuit.

This invention discloses a battery safety management method and device based on a dual-battery architecture. The invention employs a dual-circuit physical and electrical isolation architecture between the main battery and the auxiliary battery. The auxiliary battery independently constitutes a monitoring and control power supply circuit, enabling the monitoring and control circuit to operate uninterruptedly under normal conditions without relying on the main battery. This invention comprehensively covers five core operating conditions: pre-power-on pre-inspection, ultra-low power consumption monitoring during shutdown, abnormal power-off during screen-off and static operation, real-time protection during normal use, and dedicated charging protection. It constructs a unified three-level state judgment and layered handling integrated closed-loop system for normal, mild to moderate, and severe anomalies. In the shutdown state, only audible and visual warnings are provided. During high-risk anomalies under screen-off and static operation, the main battery power supply circuit is automatically cut off. During high-risk charging anomalies, both the power supply and charging circuits are simultaneously cut off. This invention solves the problems of traditional single-battery power supply equipment, such as easy monitoring failures, blind spots in safety protection, incomplete operating condition coverage, lack of active charging protection, and fragmented and unsystematic protection systems.

Systems, methods, devices, and assemblies for electrically insulating lower controls of a low voltage aerial device. The lower controls may include two or more electrically insulating components working concurrently to provide electrically insulating capabilities to electrically isolate one or more electrical cables or other electrically conductive components associated with the lower controls. For example, one or more electrical cables may communicate with an upper portion of the low voltage aerial device, such that the electrically insulating components break an electrical path to ground from the upper portion of the low voltage aerial device.

This application relates to a self-starting negative temperature coefficient current source and its starting method. The self-starting negative temperature coefficient current source of this application includes: a high-level current mirror module, a self-starting module, a low-level current mirror module, and a negative temperature current generating module sequentially coupled between a power supply terminal and a ground terminal; and an output module coupled to the high-level current mirror module and the self-starting module respectively, for replicating and outputting a negative temperature coefficient current; the control terminal of the self-starting module is electrically isolated and coupled to the output terminal of the low-level current mirror module, so that during the power-on process of the self-starting negative temperature coefficient current source, the self-starting module is turned on under the control of the low voltage at the output terminal of the low-level current mirror module, thereby causing the self-starting negative temperature coefficient current source to complete the startup and causing the negative temperature current generating module to generate a first negative temperature current corresponding to the negative temperature coefficient current. The self-starting negative temperature coefficient current source of this application does not require an external startup circuit, can start automatically, greatly reduces chip area, and lowers power consumption.

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 p 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.

This application provides a side-opening electrically operated disconnect switch, comprising: a mounting plate installed in a disconnect switch cabinet; two disconnect switch bodies, one of which is disposed on the upper surface of the mounting plate, and the other of which is disposed directly above the first disconnect switch body and connected by an insulating block; and an electrically operated device disposed below the mounting plate relative to the two disconnect switch bodies, with its drive end connected to the transmission end of the two disconnect switch bodies via a connector and used to control the opening or closing of the two disconnect switch bodies. This application can quickly disconnect the circuit in case of a fault, while avoiding the expansion of the fault due to mechanical jamming. Thus, while ensuring electrical isolation, it simplifies the mechanical structure, improves the reliability and service life of the disconnect switch cabinet, and provides an important guarantee for the safe operation of the subway power supply system.

The application relates to the field of high-density power integration, in particular to a PCB embedded power module with a buried planar Rogowski coil. The PCB embedded power module provided by the application comprises a power PCB board, a laminated structure, the laminated structure having a plurality of conductive layers and a plurality of insulating layers which are alternately stacked; a power chip which is embedded in the laminated structure of the power PCB board and is electrically connected with at least part of the conductive layers; and a planar Rogowski coil which is embedded in the laminated structure of the power PCB board and is used for sensing the current of the power chip; wherein at least part of the conductive layers of the laminated structure form a containing space through a connecting structure, and the planar Rogowski coil is buried and integrated in the containing space and is electrically isolated from the conductive layers. The application replaces the traditional spiral coil with the planar Rogowski coil by adopting the PCB buried integration method, and high-precision detection of the chip switching transient current of the PCB embedded power module is realized.