1917 results about "Electrical isolation" patented technology

The invention provides a multi-dimensional electrical equipment insulation analysis and evaluation method, and relates to the technical field of electrical equipment insulation online detection and intelligent diagnosis. According to the method, an electrically isolated direct current detection channel is constructed in a neutral point small resistance grounding system, controllable direct current detection signals are injected, micro direct current leakage response signals are collected, and after zero drift correction, temperature compensation and power frequency ripple suppression are carried out, layered attribution is carried out in combination with primary system topology and an equipment ledger, and a multi-dimensional response matrix is formed. According to the method, environment and working condition normalization is realized through factor rejection and robust pull-back, a mechanism model containing leakage channel equivalent parameters and path constraints is established, multi-working-condition data is fused to calculate equivalent insulation parameters and credibility indication quantity, and a multi-dimensional insulation representation vector is generated. And performing time sequence analysis on the representation vector, extracting degradation and abrupt change characteristics, outputting a health index and a risk level, and realizing quantitative evaluation and intelligent early warning of the insulation state.

The invention relates to the technical field of solar cells, and provides a back contact cell, a cell assembly and a photovoltaic system, a first passivation contact structure of the back contact cell is arranged in a first region, and an insulation region is provided with a first insulation dielectric layer; the first insulating dielectric layer is provided with a body part located on the insulating region and an insulating extension part extending to the first passivation contact structure. The second passivation contact structure is provided with a first contact extension part covering the body part and a second contact extension part covering the insulation extension part, a through groove is formed in a stacked structure formed by the insulation extension part and the second contact extension part in the thickness direction, and the first conductive structure is arranged at the through groove; the second conductive structure is disposed at least on a portion of the second passivation contact structure corresponding to the second region. Therefore, through the optimal design of the first insulating dielectric layer and the second passivation contact structure, the passivation effect can be improved, the electrical isolation effect can be improved, the electric leakage risk can be reduced, and the performance of the back contact battery can be improved.

The invention relates to microwave-free sensor technology with NV centers in diamond. In contrast to the prior art, the intensity of the pump radiation is not PWM-modulated, but monofrequency and sinusoidally modulated. Further measures, such as the use of semiconductor-based pump radiation sources and operation with an offset, prevent the formation of harmonics in the temporal intensity profile of the pump radiation irradiating the NV centers in the sensor element. This allows the sensor system to use the phase shift to determine measured values ​​of external physical parameters such as magnetic flux density, acceleration, temperature, etc., within a recognized and disclosed frequency range of the intensity modulation of the pump radiation, thereby minimizing the influence of noise from the pump radiation source. The galvanic isolation does not need to be compromised by cables from additional sensors.

The invention discloses a hybrid passivation back contact battery and a preparation method thereof, the battery comprises a silicon wafer, the silicon wafer comprises a first surface and a second surface which are oppositely arranged, the second surface comprises a first area and a second area, and the area of the first area is larger than that of the second area; the heterostructure comprises a first passivation layer and a first doping layer which are at least stacked on the first region; the first electrode structure is located on the first doping layer in the heterostructure; the first passivation structure comprises a tunneling oxide layer and a second doping layer which are stacked on the second region; the second electrode structure is located on the second doping layer in the first passivation structure, and the first electrode structure and the second electrode structure are electrically isolated through an isolation groove; and the second passivation structure is located on the first surface of the silicon wafer. The passivation effect of the HTBC battery is good, and the photoelectric conversion efficiency can be remarkably improved; and the preparation process of the battery is simple, few in process steps and low in equipment cost.

The invention discloses a bus duct plugging structure and a bus duct, and the structure comprises a bus duct housing, the end part of the bus duct housing is provided with a protection housing, the two sides of one end of the protection housing are provided with positioning boxes, the two sides of the bus duct housing are provided with limiting assemblies, the positioning boxes are provided with positioning assemblies, and the two sides of the protection housing are provided with protection end covers. An abutting assembly convenient to adjust is arranged on the protective end cover; according to the invention, through the arrangement of the insulating partition plates and the electrical isolation between the abutting blocks and the bus copper bars, the risks of current leakage and short circuit are effectively prevented, the safety of the whole system is improved, and through the limiting clamping design between the protective end covers and the bus duct shell and the cooperative use of the reset springs and the air bags, the connection stability is ensured, and the service life is prolonged. According to the utility model, the structure is simple, the connection looseness caused by vibration or external force is prevented, the design of the rotating handle and the sliding block enables a user to easily adjust the contact pressure between the abutting block and the bus copper bar, meanwhile, the dismounting process becomes simple and rapid, and the operation convenience is improved.

A method includes: forming first bond pads along a wafer; bonding a first die to a first set of the first bond pads, the first die being electrically connected to the wafer; depositing a gap-fill dielectric over the wafer and around the first die; forming openings in the gap-fill dielectric; forming first active through vias in physical contact with the second set of the first bond pads and first dummy through vias in physical contact with the third set of the first bond pads, the first active through vias being electrically connected to the wafer, the first dummy through vias being electrically isolated from the wafer; forming second bond pads along the first die, the first active through vias, and the first dummy through vias; and bonding a second die to the first die and to a first active via of the first active through vias.

The present invention relates to the field of electronic devices of wireless communication systems. Disclosed is an ultra-wideband and high-protection-efficiency filtering energy selective surface, comprising one or more layers of reflecting surfaces; each reflecting surface is mainly composed of a plurality of metal sheets which are located on the same plane, have the same shape and are arranged in central symmetry; a gap for electrical isolation is formed between every two adjacent metal sheets; each gap is provided with a PIN diode; the anodes and cathodes of all the PIN diodes are arranged in a clockwise or counterclockwise direction; and all the gaps form an interconnected gap structure on the plane where the reflecting surface is located. The ultra-wideband and high-protection-efficiency filtering energy selective surface can be achieved by a first-order filtering energy selective surface unit or a second-order filtering energy selective surface unit. The filtering energy selective surface of the present invention has a small surface thickness and a simple structure, can achieve fast roll-off filtering for low-power signals, achieve an ultra-wide suppression stopband, and achieve ultra-wideband and high-efficiency protection for high-power electromagnetic waves.

The utility model provides a ring main unit. The ring main unit comprises a gas tank, a fixed frame fixed on the inner side wall of the gas tank, a circuit breaker switch and a three-position switch, wherein the circuit breaker switch and the three-position switch are positioned in the gas tank. The solid-sealed polar pole of the circuit breaker switch comprises a polar pole body, a movable end shielding seat and a static end shielding seat, the movable end shielding seat and the static end shielding seat are located at the two ends of the polar pole body, the movable end shielding seat and the static end shielding seat can wrap the two ends of the polar pole body respectively, and therefore the electrical connection position of the polar pole body is electrically isolated from the external environment; the pole body, the moving end shielding seat and the static end shielding seat are cast into a whole through insulating resin, so that the consistency of the pole is improved; the grounding shielding seat adopts an integrally formed metal piece, and can uniformly wrap a plurality of grounding contacts in a shielding space, so that the electric field distribution of the grounding contacts is optimized. According to the ring main unit, dry air can be used as insulating gas, miniaturization of the ring main unit is achieved, and the corresponding insulating performance is met.

The invention discloses an anti-interference resistance detection circuit board and system based on four-wire system measurement, and relates to the technical field of industrial automatic detection. Aiming at the problems of low measurement precision, weak interference resistance and limited channel expansion of a traditional two-wire system, a current loop and a voltage sampling loop which are independently and electrically isolated are adopted, and a lead resistance error is eliminated through Kelvin connection; an EMI filter, a photoelectric coupler and a double-layer shielding cable are integrated, so that the influence of electromagnetic interference and a ground loop is inhibited; a single circuit board supports the parallel connection of at least two measuring units, realizes the cascade connection of multiple boards by combining an EtherCAT bus, and supports 384 channels at most. The measuring error is smaller than or equal to + / -0.1%, the single-channel detection time is smaller than or equal to 10 ms, the requirements of high-density and high-beat scenes such as perovskite photovoltaic glass are met, the method is suitable for 100-100 Momega wide-range resistance measurement, the signal transmission error rate in the industrial strong electromagnetic environment is extremely low, and the detection precision and the system reliability are remarkably improved.

The invention discloses an automatic double-pulse test system and method, and the system comprises an upper computer unit, a controller unit, a capacitor charging and discharging loop unit, a load inductance unit, an IGBT power unit, and an oscilloscope unit, the upper computer unit is connected with the controller unit, the controller unit is connected with the IGBT power unit, and the oscilloscope unit is connected with the capacitor charging and discharging loop unit. The control end of the controller unit is connected with the input ends of the capacitor charging and discharging loop unit and the load inductance unit, and the output ends of the load inductance unit, the capacitor charging and discharging loop unit and the oscilloscope unit are respectively connected with the IGBT power unit. The whole operation process can be realized through an upper computer. Full-automatic control and electrical isolation of the whole double-pulse test loop are realized through the controller, so that the test safety is effectively guaranteed; the turn-on and turn-off resistors driven by the IGBT can be adjusted on line, the operation is convenient, and the test efficiency is greatly improved; most IGBT double-pulse test scenes can be met, and the IGBT power module and the capacitor module can be directly and quickly connected with the system for testing.

A power semiconductor module of a power electronic system includes: a power electronic substrate; a power semiconductor die arranged on and electrically coupled to a first side of the substrate; a plastic frame arranged at the first side and defining an interior volume of the module; and a load current contact electrically connected to the first side and partially exposed from the frame. The frame includes a recess above a side of the load current contact facing away from the substrate. A driver board arranged above the module includes circuitry configured to drive power circuitry of the module. A current sensor arranged on and electrically coupled to a side of the driver board facing the module is configured to detect an alternating current flowing through the load current contact. The sensor is arranged at least partially within the recess. The frame electrically isolates the sensor from the load current contact.

The problem of forming a deep trench isolation structure suitable for photodetectors with small pitch is solved by a process in which a grid of trenches is etched from the front side using high energy plasma followed by annealing. The trenches are filled with an oxide followed by etching to recess the oxide. The trench recesses are filled with semiconductor to form a grid-shaped semiconductor structure. After FEOL processing, BEOL processing, attachment to a second substrate, and thinning from the back side, an etch removes the oxide from the back side. The etch stops on the grid-shaped semiconductor structure. The trenches are then lined and filled from the back side. The front side etch allows the trenches to be made narrow and with highly vertical sidewalls. Lining and filling the trenches from the back side provides good optical and electrical isolation.

A semiconductor device includes a plurality of field effect transistors (FET) formed upon semiconductor fins. Each FET includes a gate disposed transversely upon a first portion of the fins of the FET, one or more source / drain regions disposed upon the fins and in contact with the gate, and an electrically isolating layer disposed adjacent to a second portion of the fins above the gate and the source / drain regions, the electrically isolating layer having an interface with the gate. The device further includes a buried power rail (BPR) disposed between otherwise adjacent FETs. The BPR includes a metal rail extending beyond the interface into the gate, and electrically isolating sidewalls separating the metal rail from the gate and the source / drain regions. The device also includes a via-buried power rail contact disposed adjacent to the electrically isolating sidewalls, in contact with the metal rail, and in contact with one source / drain region.

The invention belongs to the technical field of energy storage fire fighting, and particularly discloses an emergency fire fighting system and method for an immersed battery energy storage power station, and the system comprises a battery pack, an immersion liquid storage tank, a fire fighting liquid storage tank, a pumping system and a control system. The battery pack is composed of a plurality of stacked battery packaging units, and a temperature and smoke sensor array and a scattering nozzle are installed above a battery module in each battery packaging unit and used for monitoring fire behavior in real time and spraying fire fighting liquid. The immersion liquid storage tank is connected with the battery packaging unit through a pipeline and is used for battery heat dissipation and insulation protection; the fire-fighting liquid storage tank is connected to the scattering nozzle through a pipeline to provide emergency fire extinguishing support; the pumping system comprises an immersion liquid pump and a fire-fighting liquid pump; the control system is in linkage with the sensor and the pumping system, electrical isolation, immersion liquid emptying and fire-fighting liquid injection operation of a fault module are automatically triggered according to monitoring data, accurate positioning fire extinguishing is achieved, the influence on adjacent normal modules is reduced to the maximum extent, and safety and operation and maintenance efficiency are improved.

Provided are a charging system, an electrical isolation system, a control system, and a shockwave device. The charging system is provided with at least two electrical isolation circuits, thereby improving the frequency of sending charging control signals and further improving the frequency of charging a shockwave generation apparatus. The electrical isolation system can greatly improve the dielectric strength of the electrical isolation system, reduce a leakage current on the surface of a shockwave generator, and ensure the safety performance of the shockwave generator. The shockwave device can effectively monitor the discharge energy of a shockwave emitter, thereby improving treatment safety, controllability, and working efficiency.

The invention discloses a power device driver and a parameter correction method thereof, which are applied to the technical field of power device driving, and are characterized in that a data acquisition module acquires grid voltage and peak current of an IGBT (Insulated Gate Bipolar Translator) in the working process of the IGBT to obtain sampling data; the digital isolation chip realizes electrical isolation among the data acquisition module, the MCU and the grid voltage regulation module; the MCU calibrates the real-time junction temperature data based on the sampling data by using a preset junction temperature calibration formula and outputs calibrated junction temperature data; the gate driving chip outputs a gate voltage capable of driving the IGBT according to the control signal; the second-order short-circuit protection module sends an abnormal signal to the MCU when the IGBT is short-circuited, so that the MCU sends a grid voltage regulation trigger signal to the grid voltage regulation module; the grid voltage adjusting module responds to the grid voltage adjusting trigger signal and controls itself to reduce the grid voltage. Based on the power device driver and the parameter correction method thereof provided by the invention, the junction temperature monitoring precision and reliability are improved.

An electrical transmission safety system for connection of direct current (DC) power from a DC power source to a load comprises: a connection from the power source to the load, the connection comprising a positive terminal and a negative terminal; a first solid state switch electrically connected between the power source and one of the positive terminal and negative terminal; and a switch-control isolation block comprising a first optocoupler, the first optocoupler providing electrical isolation from the power source for generating a first isolated switch-control signal in response to a switch-control input signal, the switch-control isolation block connected to provide the first isolated switch-control signal to the first solid state switch to thereby control an ON or OFF conduction state of the first solid state switch and corresponding current flow between the power source and the load through the one of the positive terminal and negative terminal.

The invention provides an integrated circuit packaging system with an isolation structure. The system comprises an isolation barrier building assembly which divides a function module and a signal path into a plurality of isolation areas; the electrical performance test assembly is responsible for applying an electrical performance test signal of the integrated circuit at the input end of the integrated circuit, collecting an output signal of the integrated circuit at the output end, and analyzing the electrical performance test signal and the output signal to obtain a quality parameter of the electrical performance test signal; and the signal path adjustment component is responsible for providing adjustment suggestions for the signal path of the current integrated circuit according to the analysis result of the quality parameters. According to the invention, electrical isolation and physical protection are ensured; the signal quality and the system performance under the isolation structure are evaluated through analysis of the test signal and the output signal; providing an optimization suggestion according to a test result, and adjusting a signal path and an isolation barrier design; and the integrated circuit packaging system with the isolation structure is ensured to reach the optimal level in the aspects of electrical performance, signal integrity and reliability.

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 high-temperature-resistant flame-retardant carbon fiber cable and an intelligent preparation method thereof, and relates to the technical field of power cables, and the cable is composed of a composite bearing core, a first / second electrical isolation belt, a stranded conductor, an annular composite bearing layer, a high-temperature-resistant main insulator and a low-smoke halogen-free outer sheath. The force bearing core is formed by bundling carbon fiber micro rods, elastic reset layers are arranged between the micro rods, micro-particle friction layers are formed on the outer surfaces of the micro rods, and a stable friction-rebound interface is constructed. A fire-resistant barrier, a phase change microcapsule filling layer and a fiber bragg grating can be arranged, and fire resistance, thermal peak suppression and on-line monitoring are considered. And closed-loop control of pultrusion, surface activation, coating and on-line thickness measurement / friction test is carried out in the manufacturing process. The cable can be operated at 200 DEG C for a long time and at 250 DEG C for a short time, the residual elongation is less than or equal to 0.10%, and light weight, high strength, high temperature resistance, low smoke and flame retardance are realized.

Various embodiments of the present disclosure are directed towards a method for forming a semiconductor structure. The method includes forming a first bond pad isolation structure within a substrate. A second bond pad isolation structure is formed with the substrate. The second bond pad isolation structure is disposed laterally between inner sidewalls of the first bond pad isolation structure. The first bond pad isolation structure and the second bond pad isolation structure are formed concurrently with one another. A bond pad is formed extending through the substrate. The bond pad comprises a conductive body overlying the second bond pad isolation structure and a conductive protrusion extending from the conductive body to below the substrate. The second bond pad isolation structure laterally wraps around the conductive protrusion.

The invention discloses a vehicle BMS high-voltage sampling system based on isolated high-voltage sampling, and the system comprises a voltage dividing module which is used for dividing the voltage collected by a BMS and then outputting the voltage, and an isolated operational amplifier module which is used for inputting the divided voltage to the isolated operational amplifier module, converting the input voltage from a differential-mode voltage to a common-mode voltage and then outputting the common-mode voltage, the isolation operational amplifier module inputs a common-mode voltage to the operational amplifier module, the operational amplifier module converts the input common-mode voltage into a differential-mode AD voltage value and outputs AD voltage value data, and the low-voltage control module is electrically connected with the operational amplifier module. The operational amplification module inputs AD voltage value data to the low-voltage control module, and the low-voltage control module collects an AD voltage value and sends the AD voltage value to a whole vehicle control unit of the vehicle; according to the invention, the architecture of the double-high-voltage sampling system is simplified, and the high-voltage sampling stability is improved; the use of high-low voltage isolation devices is reduced, and the high-low voltage electrical isolation capability is improved.

The embodiment of the invention provides a transformer bushing oil extraction tool system and a control method and device thereof, and the system comprises a multi-degree-of-freedom flexible positioning module, a real-time data collection and feedback control module, an electrical isolation and insulation module, and an intelligent alarm system. Automatic operation of oil extraction of the transformer bushing in an electrified environment can be achieved, the accuracy, the sealing performance and the safety of the oil extraction process are ensured, and the efficiency and the reliability of equipment maintenance are improved. Wherein the flexible positioning module enables the oil taking module to be accurately in butt joint with an oil taking port, the data acquisition and feedback control module monitors and adjusts pressure and flow in real time, and the stability of oil taking is ensured; the electrical isolation module provides necessary insulation protection to avoid high-voltage risks; and the alarm system automatically gives an alarm and stops operation when abnormity occurs, so that multi-layer safety guarantee is provided for system operation.

The invention relates to microwave-free sensor technology with NV centers in diamond. In contrast to the prior art, the intensity of the pump radiation is not PWM-modulated, but monofrequency and sinusoidally modulated. Further measures, such as the use of semiconductor-based pump radiation sources and operation with an offset, prevent the formation of harmonics in the temporal intensity profile of the pump radiation irradiating the NV centers in the sensor element. This allows the sensor system to use the phase shift to determine measured values ​​of external physical parameters such as magnetic flux density, acceleration, temperature, etc., within a recognized and disclosed frequency range of the intensity modulation of the pump radiation, thereby minimizing the influence of noise from the pump radiation source. The galvanic isolation does not need to be compromised by cables from additional sensors.

The utility model relates to a photovoltaic module. The photovoltaic module comprises a plurality of battery strings, a plurality of first bus bars, a plurality of second bus bars, an electrical isolation piece, a plurality of first diodes and a plurality of second diodes, the plurality of first bus bars includes a plurality of intermediate bus bars electrically connected to one of the first electrode and the second electrode of the battery string and a plurality of edge bus bars electrically connected to the other of the first electrode and the second electrode of the battery string. In the thickness direction of the battery string, the electrical isolation piece is arranged between the second bus bar and the battery string. Every two adjacent battery strings are defined as a battery string group, the edge bus bars electrically connected to the two battery strings with the battery string group are connected to a second bus bar in parallel, and in the same battery string group, the two middle bus bars are electrically connected with one end of a first diode and one end of a second diode respectively. And the same second bus bar is electrically connected with the other ends of the first diode and the second diode respectively. And the hot spot temperature of the photovoltaic module can be reduced.

The invention discloses a preparation method and a structure of a photonic integrated device, and the method comprises the steps: sequentially dividing a substrate into a front modulator region, a rear modulator region, a front grating region, a gain region and a rear grating region, and growing a first active layer after manufacturing a selected region epitaxial mask pattern in the gain region, the method comprises the following steps of: growing a first active layer in a front modulator region after mask etching operation, growing a second active layer in a front modulator region after mask etching operation, growing a third active layer in a grating region after mask etching operation, finally performing grating manufacturing, and completing manufacturing of a cladding layer, an electric contact layer, an inverted table shallow ridge waveguide structure, an electric isolation trench and an electrode. According to the method, integration of multiple materials is achieved through one-time selective area epitaxial growth and one-time butt joint growth, the material growth frequency is reduced, and the manufacturing cost is saved; the gain region and the rear modulator region realize forbidden band width offset through selective region epitaxial material growth, and multi-wavelength tuning and efficient modulation are realized through fluorescence wavelength difference design of each region, so that a solution can be provided for integration of a wide-wavelength tunable laser and a double-electro-absorption modulator.

The utility model is suitable for the technical field of main-grid-free back contact cells, and provides a main-grid-free back contact cell, a cell assembly and a photovoltaic system. The main-grid-free back contact battery comprises a main grid line area and a plurality of edge grid line areas, wherein the main grid line area is positioned between two edge grid line areas; the fine grid in the edge grid line area is provided with a plurality of first insulating glue and a plurality of first connecting structures, the first connecting structures electrically connect the fine grid with the welding strip, and the first insulating glue electrically isolates the fine grid from the welding strip; wherein the area of the single first insulation paste is larger than that of the single first connection structure. According to the main-grid-free back contact battery, the area of the first insulation paste in the edge grid line area is larger than the area of the first connection structure, so that larger electrical isolation is provided for the grid lines and the welding strips in the edge grid line area, the short circuit problem is prevented, and the effect of improving the stability of the main-grid-free back contact battery is achieved.

A bidirectional high voltage AC-DC converter includes a primary three-phase three-level T-type power factor correction circuit, a full-bridge switching circuit connected to the primary three-phase three-level T-type power factor correction circuit output, an isolated capacitor-inductor-inductor-capacitor (CLLC) resonant tank connected to the full-bridge switching circuit, a T-type full-bridge output topology circuit connected to the CLLC resonant circuit, and a controller that controls one or more of the components of the bidirectional isolated high voltage AC-DC converter. The primary three-phase three-level T-type power factor correction circuit and the secondary three-level circuit include a split DC-link bus with respective voltages that are actively controlled by the controller. The CLLC resonant converter circuit includes an isolation transformer that electrically isolates the primary side from the secondary side of the bidirectional isolated high voltage AC-DC converter. A control method includes synthesizing, via a modified space vector pulse width modulation (SVPWM) scheme or a variable-amplitude double-carrier sine-triangle PWM with capacitor bank middle point voltage control, one or more output voltages of the front end three-phase three-level T-type PFC circuit, wherein the modified SVPWM scheme is based, at least in part on a nearest four vectors technique.

The invention relates to the technical field of electric energy meter calibration, and provides an intelligent calibration method and system for an electric energy meter. The method comprises the steps that after calibration is triggered, a bus electric energy meter is switched to a bus-level electrical isolation scene through a switching relay; extracting a first group of bus-level metering values after injecting all-condition steady-state signals; comparing the theoretical values to calculate a first group of bus-level errors; judging whether to switch to a branch-level electrical isolation scene or not according to the error distribution characteristics; if switching is carried out, a multi-dimensional disturbance load combination is dynamically loaded on the K branch circuits through the program control load module, and a second group of bus level metering values are synchronously metered; and performing branch-level energy consumption error traceability calculation on the second group of values, and executing closed-loop calibration to solve the technical problems of low calibration precision and incapability of accurately reflecting error distribution caused by incapability of coping with a multi-dimensional disturbance load environment in real time in a traditional electric energy meter calibration process, so as to achieve the purposes of improving the accurate calibration capability of the electric energy meter in multiple scenes and improving the calibration accuracy of the electric energy meter in multiple scenes. And the equipment calibration time is shortened.

The invention relates to the technical field of air purification, and discloses a negative oxygen ion generator and a method thereof.The negative oxygen ion generator comprises an external shell used for providing installation positions for related parts; the power supply input module is mounted in the external shell, is internally provided with a filtering unit, and is used for receiving external direct current; the direct current and alternating current inversion module is electrically connected with the output end of the power supply input module, is internally provided with a switch assembly and is used for converting the direct current into high-frequency alternating current; a primary winding, a secondary winding and a feedback winding are arranged in the boosting transformer. A boosting transformer is arranged between a direct current and alternating current inversion module and a high-voltage double-voltage rectification module, so that the voltage is effectively boosted, more importantly, the magnetic field coupling characteristics of a primary winding and a secondary winding are utilized, reliable electrical isolation is constructed, and a physical path from a high-voltage side circuit to a low-voltage side circuit is blocked.