199 results about "Arc voltage" patented technology

The invention discloses a gradient welding strength control method and system for a welded galvanized steel pipe for fire fighting, particularly relates to the technical field of welding automation control, and aims to solve the problem of abnormal welding seam strength gradient caused by instantaneous unbalance of an electric field and a thermal field during dynamic parameter switching in the prior art. Electromagnetic distortion characteristic quantity is extracted through frequency domain energy analysis, and thermodynamic offset state quantity is deduced in combination with a thermal diffusion trend; on the basis of frequency band correlation mapping of electromagnetic and thermodynamic parameters, thermoelectric cooperative imbalance levels are divided through mutual information entropy evolution, and a self-adaptive harmonic attenuation weight tuning instruction is generated; analyzing a mismatching relation between transient disturbance of an environment magnetic field and arc voltage modulation distortion in real time, dynamically generating a magnetic field compensation factor and reversely superposing the magnetic field compensation factor to a control instruction; and in combination with the matching degree of molten pool oscillation energy and a harmonic frequency spectrum, correcting wire feeding rate calibration, reconstructing a multi-band harmonic energy proportion spectrum, outputting an anti-interference welding control signal, and realizing dynamic balance between arc stability and molten pool heat input.

The invention relates to the technical field of metal welding automation control, in particular to a metal welding seam automatic tracking welding system based on machine vision. Comprising a data acquisition module used for acquiring initial three-dimensional geometric parameters of a welding seam and monitoring welding process parameters including welding current, arc voltage and welding speed; the thermal deformation prediction module is used for solving a weld joint thermal deformation displacement vector; the dynamic deviation evaluation module is used for calculating a dynamic deviation index; the risk grading module is used for judging the trajectory deviation risk as safety, first-level risk or second-level risk; the defect tendency prediction module is used for calculating an incomplete fusion index and a hot crack index; the comprehensive risk assessment module is used for determining a comprehensive process risk factor; and the track correction module is used for generating a corrected welding gun target track so as to carry out closed-loop correction control on the welding process. According to the method, the problem of trajectory deviation caused by thermal hysteresis and dynamic deformation is solved, and the tracking precision and stability of the welding path are remarkably improved.

The invention discloses a welding robot self-adaptive wire feeding control method, a platform and a medium, relates to the technical field of welding automation process control, and is suitable for welding process management under complex working conditions. According to the method, an arc voltage sequence and a molten pool characteristic parameter sequence in the welding process are collected, a welding state characteristic value is obtained through calculation, a reference database containing welding process parameters, welding working condition parameters and the welding state characteristic value is constructed based on historical experimental data, and corresponding preset reference indexes are generated through a mapping relation function; and in real-time welding, the welding state characteristic value of the current wire feeding control period is obtained and compared with a preset reference index, the deviation value is calculated, the welding state is judged according to the grading threshold value interval, the wire feeding speed is dynamically adjusted, and self-adaptive matching of the wire feeding speed and the welding state is achieved. According to the method, instability caused by traditional adjustment depending on experience can be overcome, dynamic control over the welding process is achieved, and the stability of a welding pool and the welding seam forming quality are improved.

The invention relates to the technical field of welding automation, and discloses an intelligent welding system for an electric pole steel reinforcement framework. The system comprises a welding execution module, a multi-mode sensing module, an edge calculation module, a real-time regulation and control module and a system control center. Synchronous collection and real-time analysis of images, temperature and sound signals of a welding pool area are achieved, so that defects such as air holes, slag inclusion and incomplete fusion can be recognized online in a key time window when the welding pool is not solidified, and time delay caused by a traditional off-line detection mode is thoroughly eliminated. Through a real-time regulation and control module, on the basis of a multi-target optimization decision and parameter self-adaptive adjustment mechanism, the system can dynamically adjust key process parameters such as welding current, arc voltage and welding speed at the moment of identifying defect germination or process deviation, and real-time intervention and closed-loop control on welding quality are achieved; therefore, the final formation of defect welding seams is avoided fundamentally, and the rework rate and the material waste are remarkably reduced.

The invention relates to the technical field of ammeter fault detection, and provides an intelligent ammeter series arc fault detection method, system and device, a medium and equipment, and the method comprises the steps: firstly obtaining an ammeter data set of an intelligent ammeter, which comprises a pre-ammeter voltage, a post-ammeter voltage and a total loop current in a continuous power frequency period, and then carrying out the division through a sliding time window, obtaining a plurality of ammeter data windows; for each window, calculating a voltage difference sequence and a dynamic loss impedance sequence; when the absolute value of the total loop current is smaller than a preset threshold value, determining the current zero-break interval of each power frequency period and the current zero-break time corresponding to the window; determining an arc voltage estimation value according to a voltage difference between non-zero-break intervals in the zero-break interval; and finally, integrating the current zero break time, the arc voltage estimated value and the dynamic loss impedance of each window to judge whether a series arc fault exists, and if so, triggering a protection action. According to the embodiment of the invention, high-reliability identification of the series arc fault is realized.

The invention discloses a laser-assisted helium arc penetration fusion welding method, and belongs to the technical field of welding. The problems that according to an existing paraxial laser-electric arc composite structure, the welding track is difficult to control, the energy coupling efficiency is low due to laser energy loss, and weld joint partial melting and undercut defects are caused due to uneven distribution of a welding temperature field due to a generated asymmetric heat source are solved. The welding method comprises the steps of 1, pretreatment; 2, after being focused by a focus lens, the laser is divided into three laser beams through a spectroscope, then the three laser beams are converged again through a plurality of reflectors, three fan-shaped light spots are formed on the surface of the to-be-welded plate after convergence, and finally the focal plane position of the laser is adjusted to be located on the surface of the to-be-welded plate; 3, setting welding current and arc voltage; and fourthly, laser is used for assisting helium arc penetration fusion welding. The method is used for laser-assisted helium arc penetration fusion welding.

The invention belongs to the technical field of smelting furnace intelligent control, and particularly relates to an intelligent smelting furnace for titanium alloy heating, which comprises a data acquisition module, an arc stability judgment module, a position adjustment control module and a feedback adjustment module. And the voltage and current variation coefficient weight design is dynamically adjusted based on the electrode consumption height, the change of the current fluctuation sensitivity after electrode consumption is adapted, real-time accurate quantitative evaluation of the arc stability is realized, the abnormal state of the consumable electrode can be timely and accurately identified, and through the morphological characteristics of the molten pool and the arc deviation characteristics, the arc quality is improved. According to the method, an adjustment vector containing height and transverse displacement is generated, the smelting defects such as molten pool writhing, local overheating and component segregation caused by insufficient adjustment pertinence are avoided, finally, weight distribution and adjustment coefficients are dynamically optimized through a feedback mechanism, and the electric arc stability control and adjustment accuracy is remarkably improved.

The invention discloses a modeling method and system for a vehicle network field circuit coupling model under a contact line short-circuit working condition, and relates to the technical field of modeling, and the method comprises the following steps: constructing a short-circuit arc equivalent model under the contact line short-circuit working condition based on an isolation switch equivalent model, one end of the short-circuit arc equivalent model is connected with a contact line in sliding connection with a pantograph in the chain type lumped tau-shaped network model through a switch element, the other end of the short-circuit arc equivalent model is connected with a steel rail in the chain type lumped tau-shaped network model, and a vehicle network circuit model under the contact line short-circuit working condition is obtained; and taking the short-circuit arc current at any short-circuit phase obtained through simulation of the vehicle network circuit model as a current excitation source of the three-dimensional model, and obtaining a vehicle network field model under the contact line short-circuit working condition. The rise rate, peak value and attenuation process of the short-circuit current can be accurately simulated by adding the short-circuit arc, the arc voltage drop is reflected, and the authenticity and practicability of simulation are remarkably improved.

A converter station AC filter group circuit breaker abnormal arcing modeling analysis method comprises the following steps: firstly, carrying out time mark alignment, amplitude calibration and filtering de-noising on wave recording signals such as AC bus voltage and filter branch current to obtain high-quality input data; then, combining a primary wiring diagram, enabling an alternating current system to be equivalent to an ideal power supply and series impedance, enabling circuit breaker arcing to be equivalent to arc resistance changing along with time, and constructing an equivalent circuit model comprising the power supply, the impedance, a capacitor, an electric reactor and dynamic arc resistance; establishing a state space equation according to a voltage and current constraint relation, and performing time domain solution by adopting a two-step two-order or three-order diagonal implicit Runge-Kutta method to obtain voltage and current responses of the whole process of the fault; on this basis, the arc resistance change is inversed according to the ratio of arc voltage to current, the current zero passage is identified through the resistance symbol change at adjacent moments, and the zero passage section is smoothed; and finally, the inversion result is verified again by means of the simplified equivalent model.

The invention provides a circuit breaker contact ablation evaluation method and device, electronic equipment and a storage medium, and the method comprises the steps: collecting a test current and a mechanical stroke curve of a pull rod of a hydraulic mechanism of a to-be-tested circuit breaker in a breaking test process of the to-be-tested circuit breaker; collecting a first arc voltage waveform of a main contact and a second arc voltage waveform of an arc contact of the circuit breaker to be tested; evaluating the ablation state of the main contact by using the test current and the first arc voltage waveform; and evaluating the ablation state of the arc contact by using the first arc voltage waveform, the mechanical stroke curve and the second arc voltage waveform. According to the scheme, the ablation states of the main contact and the arc contact are evaluated through the test current, the mechanical stroke curve and the arc voltage waveform, the ablation states can be evaluated without enabling the circuit breaker to be separated from a normal working state or a test state, and the evaluation efficiency is improved.

The invention discloses a surface arcing voltage prediction method based on an electric field feature set and a terminal. The method comprises the following steps: measuring a voltage data set of surface arcing voltage of an insulating material under different environmental factors through tests; constructing an electric field distribution simulation model of surface arcing based on the test parameters, outputting an electric field distribution original data set by the electric field distribution simulation model, and extracting a corresponding electric field feature set from each electric field distribution original data; and carrying out model training based on the voltage data set and the corresponding electric field feature set, and carrying out surface arcing voltage prediction by using a surface arcing voltage prediction model obtained by training, so that accurate and rapid prediction of the surface arcing voltage of the insulating material in the wet and dirty environment can be realized. And an effective technical support is provided for external insulation design and state evaluation of the electrical equipment.

The invention discloses a pulse welding droplet transition control method, system and device and a storage medium, and the method comprises the steps that a first pulse parameter of a main pulse and a second pulse parameter of a micro pulse for welding are initialized, and the micro pulse is used for being superposed on a peak stage of the main pulse to form a target pulse sequence; a pulse current waveform of the target pulse sequence is determined according to the first pulse parameter and the second pulse parameter, and target welding current is generated according to the pulse current waveform; the target metal material is welded according to the target welding current, and a real-time molten drop image and a real-time arc voltage are collected; determining the diameter deviation of the molten drop according to the real-time molten drop image, determining the arc voltage deviation according to the real-time arc voltage, and optimizing the first pulse parameter and the second pulse parameter according to the diameter deviation of the molten drop and the arc voltage deviation. The method improves the welding seam forming quality and the metal welding quality, and can be widely applied to the technical field of metal welding.

The invention discloses a welding power supply extension module integrating arc voltage tracking and welding machine control functions and a welding control method, and belongs to the technical field of electric arc welding. In order to solve the problems that arc voltage tracking and welding machine control are mutually independent and cannot cooperate in real time in the existing TIG welding process, so that the welding process is tedious in operation and unstable in quality, the system comprises a core processor for executing an arc voltage tracking control algorithm and a welding parameter adjusting algorithm; the signal conditioning circuit is used for collecting and conditioning a current signal and a voltage signal output by the welding power supply; the welding power supply control module is provided with a plurality of interface circuits used for being connected with welding power supplies of different interface types; the core processor receives state information of the welding process through the high-speed communication module and generates a first control instruction used for adjusting output parameters of a welding power source and a second control instruction used for adjusting the height of a welding gun according to the state information and current signals and voltage signals collected by the signal conditioning circuit. The method is used for electric arc welding.

The invention provides a CRDM middle omega welding seam automatic welding control system and method, and relates to the technical field of CRDM middle welding seam automatic welding. The automatic welding control system comprises a molten pool image module used for collecting molten pool images and obtaining the real-time width-depth ratio R of a molten pool; the arc voltage acquisition module is used for acquiring real-time arc voltage information; the wire feeding control module is used for controlling the wire feeding speed; the main control module is in signal connection with the molten pool image module, the data acquisition module and the wire feeding control module; wherein the main control module adjusts the height of the welding gun according to the real-time arc voltage information and the preset arc voltage information; the current is adjusted according to the real-time width-depth ratio R of the molten pool and the preset width-depth ratio Rmin of the molten pool; and controlling the wire feeding control module to adjust the wire feeding speed according to the adjusting current. High-precision adjustment of arc voltage, welding current, wire feeding speed and the like is achieved through closed-loop control, welding precision and welding quality are effectively improved, and high-precision welding of CRDM middle welding seams is achieved.

A unit pole of a double-breakpoint switch belongs to the technical field of low-voltage electric appliances. Comprising a shell, static contacts, a bridge-type moving contact, an arc extinguish chamber and a rotating shaft, the static contacts, the bridge-type moving contact, the arc extinguish chamber and the rotating shaft are located in the shell, the bridge-type moving contact is installed in the rotating shaft and comprises a pair of moving contact arms which extend out of the rotating shaft in a back-to-back mode, the static contacts are in a flat plate shape and are arranged on the top wall and the bottom wall in the shell respectively, and the arc extinguish chamber is arranged in the shell. The arc extinguish chambers are arranged in the shell and are in contact fit with the movable contact arms respectively, the movable contact arms form a < shape when making contact with the static contact, and the arc extinguish chambers are located on the left side and the right side in the shell respectively. The arc extinguish chamber has the advantages that the space occupied by the static contact in the shell is reduced, so that the space for placing the arc extinguish chamber can be increased, the arc extinguish chamber can obtain a larger space in the array direction of the grid sheets, more grid sheets can be stacked, the arc voltage can be improved, and the arc can be extinguished quickly; and meanwhile, the requirement of high-voltage breaking is met.

The invention relates to a high-voltage SF6 circuit breaker asymmetric short-circuit current breaking result prediction method, equipment and a medium. The method comprises the following steps: acquiring a plurality of groups of arc voltage and arc current test data obtained by performing a T100a test on a target circuit breaker under a first time constant; based on the test data, establishing a black box arc model, and fitting to obtain arc dissipation power and arc time constant corresponding to each group of test data through numerical solution and parameter optimization algorithms, thereby obtaining an on-off critical value; fitting is carried out in an arc breaking critical parameter fitting model, and values of a first parameter, a second parameter, a third parameter and a fourth parameter are determined; and obtaining a predicted value of an on-off value under the working condition through an arc on-off critical parameter fitting model, if the predicted value is greater than an on-off critical value, determining that on-off is successful, otherwise, determining that on-off is failed. Compared with the prior art, the method has the advantages of high accuracy, high practicability, simple process and the like.

The invention relates to the technical field of welding quality detection, and discloses an online detection system for welding quality. A welding area monitoring device of the system is arranged around a working area of welding equipment and used for capturing an optical radiation signal and a heat distribution signal in the welding process; the multi-source data acquisition device is connected with the welding area monitoring device and synchronously acquires welding current fluctuation data, arc voltage change data and wire feeding speed data; the real-time feature extraction device receives the multi-source data and constructs a welding process dynamic feature set; the dynamic analysis device generates welding quality evaluation parameters according to the dynamic feature set; and the output control device generates a welding process parameter adjusting instruction based on the welding quality evaluation parameter. The system realizes real-time detection and dynamic control of welding quality, improves welding production efficiency and quality stability, and is suitable for various industrial welding scenes.

The invention discloses a contact ablation assessment method and system in an SF6 circuit breaker breaking test, and relates to the field of contact ablation assessment, and the method comprises the steps: connecting an arc voltage divider in parallel at two ends of an SF6 circuit breaker, deploying a displacement sensor, and starting a main contact and arc contact breaking test; in the test process, arc voltage, current magnitude, contact displacement and voltage waveform data are acquired in real time through a high-frequency data acquisition system, denoising processing is performed on the voltage waveform data, and starting time, duration time and peak voltage of the arc are extracted; establishing a regression relation model between the arc duration time and the current magnitude according to the arc duration time and the current magnitude; and evaluating the ablation degree of the main contact through the regression relation model between the arc duration and the current magnitude, evaluating the ablation degree of the arc contact through the contact displacement, and generating a real-time contact health evaluation report according to the ablation evaluation result. And the evaluation efficiency is effectively improved.

The invention relates to the technical field of welding control, in particular to a welding control method and system for a tank body welding machine. The method comprises the steps that in the arc starting stage, the change rate of contact resistance is calculated in real time, when the change rate is larger than a preset change rate threshold value, main welding current is switched, a welding wire is drawn back to complete arc starting, and in the steady-state welding stage, the reference height of a welding gun is calculated based on the rotation angle of a tank body and pre-stored weld joint contour data; performing fast Fourier transform on the arc voltage, calculating an arc form factor, weighting deviation between the target arc voltage and the arc voltage by using the arc form factor to obtain a welding gun height compensation amount, generating a wire feeding speed regulation factor based on the arc form factor, and regulating a reference wire feeding speed to obtain a welding gun height compensation value; and the welding gun reference height and the welding gun height compensation amount are superposed to generate a welding gun height instruction. According to the scheme, arcing can be accurately controlled, the reliability of height tracking of the welding gun and the self-adaptive wire feeding speed are improved, and the welding seam quality is improved.

This application provides a wire feeding control method and apparatus. The method and apparatus acquire the voltage feedback value of the welding arc during welding, determine the speed difference between the wire pusher motor and the wire drawer motor based on this voltage feedback value, a preset voltage threshold, and the wire pusher motor's speed, and then determine the wire drawer motor's speed. That is, the wire drawer motor's speed is adjusted simultaneously based on the wire pusher motor's speed and the voltage feedback value. This not only achieves synchronous control of the wire pusher and drawer motors, ensuring a smooth and stable wire feeding process, but also adjusts the wire drawer speed in real time according to the arc voltage of the welding arc, ensuring a stable and vibration-free wire feeding speed into the welding torch, thereby ensuring the stability of the welding arc and improving welding quality. Furthermore, this application can also perform variable-speed wire feeding control of the wire pusher motor based on a preset first wire pusher speed and a calculated second wire pusher speed. This application also provides a welding control system applying the above method or apparatus.

This invention discloses a plasma generator, including a rear electrode assembly and an output electrode assembly. The output electrode assembly includes an output electrode connected to the rear electrode assembly. The inner cavity of the output electrode includes a first compression section, a throat straight section, and a first expansion section connected sequentially at their ends along the medium flow direction. Along the medium flow direction: the cross-sectional area of ​​the first compression section gradually decreases, the cross-sectional area of ​​the throat straight section remains constant, and the cross-sectional area of ​​the first expansion section gradually increases. In the plasma generator provided in this application, by first compressing and then expanding the medium within the inner cavity of the output electrode, under the same power conditions, the electrode ablation rate is reduced by increasing the arc voltage and decreasing the operating current. Therefore, the service life of the plasma generator provided in this application is extended.

The invention discloses a molded case circuit breaker on-off process dynamic simulation method based on a heterogeneous simulation system, and relates to the technical field of low-voltage electric appliance design and simulation. Loop current calculated by the first simulation subsystem is transmitted to the second simulation subsystem in real time and used for calculating electromagnetic force for driving a mechanism to move, and contact displacement generated by mechanism movement is immediately fed back to the first subsystem and used for dynamically updating resistance characteristics of an arc model, so that calculation of arc voltage is affected, and the simulation effect is achieved. The arc voltage is directly fed back to the circuit model to determine the current value at the next moment, so that a simulation chain for complete dynamic interaction of the circuit current, the electromagnetic force, the mechanical displacement, the arc resistance, the arc voltage and the circuit current is formed; therefore, the simulation model can reflect the dynamic evolution process of each physical quantity in the real on-off process in a self-consistent manner.

The invention relates to an SF6 circuit breaker breaking capacity evaluation method and device based on an arc black box model and a medium. The method comprises the steps that a voltage value and a current value in the breaking process of an SF6 circuit breaker are collected; collecting an arcing interval input charge quantity and gas pressure in an arc extinguish chamber under the current on-off working condition; a fitting arc voltage curve is calculated through the voltage value and the current value in the breaking process, and a set of Mayr model parameters are selected according to the difference value between the fitting arc quenching peak and the actual arc quenching peak of the fitting arc voltage curve; substituting the Mayr model parameters, the input charge quantity and the gas pressure in the arc extinguish chamber into a dimensionless relational expression constructed based on dimensional analysis for solving to obtain an on-off constant, determined by historical on-off test data, of the SF6 circuit breaker; and calculating the predicted arc extinguishing peak voltage of the to-be-evaluated SF6 circuit breaker under each on-off working condition so as to evaluate the on-off capability of the to-be-evaluated SF6 circuit breaker. Compared with the prior art, the method has the advantages of low cost, high efficiency, high universality and the like.

The invention relates to the technical field of disconnecting switches, in particular to a switching device with an arc extinguishing system, which comprises a base, a cover body matched with the base and an enclosed cavity arranged between the base and the cover body, the enclosed cavity comprises shells stacked from top to bottom, and a rotary contact mechanism, a static contact, a medium cover and a transmission mechanism are arranged in the shells; the rotary contact mechanism can rotate around the central axis and is used for being connected with the static contact to achieve closing or being disconnected to achieve opening. According to the switching device with the arc extinguishing system, the core problems that the voltage boosting of a small-size single-pole switch is limited, the arc extinguishing is difficult and the like are effectively solved. Through the synchronous action of the sickle-shaped dielectric cover and the rotary contact mechanism, the static contact is coated and the arc path is cut off during opening, and an arc-resistant gas-generating insulating material is matched, so that the arc voltage can be quickly increased, the disconnection voltage of products with the same volume is increased to more than DC800V from DC400V, and the industrial voltage specification requirements of 400V and more are met.

The invention discloses a resonance type high-capacity direct-current change-over switch, a control method and a direct-current power transmission system. The switch comprises a main through-flow branch, a main on-off branch, a high-frequency resonance branch and a voltage-limiting energy consumption branch which are connected in parallel, the main through-flow branch is composed of an SF6 switch, the main on-off branch is composed of a vacuum trigger gap, the high-frequency resonance branch is composed of a resonance inductor, a resonance capacitor and a resonance excitation source which are connected in series, and the resonance excitation source is composed of a forward thyristor group, a reverse thyristor group and a pre-charging capacitor. And the states of the forward thyristor group and the reverse thyristor group are complementary. The functions of long-term through-flow, high-frequency on-off and resonance excitation are realized by different elements such as the SF6 switch, the vacuum trigger gap and the resonance excitation source, so that the rated current level and the resonance frequency are greatly improved, the capacitor consumption is reduced, the limitation of SF6 arc voltage on the conversion current level is broken, and the miniaturization design of the high-capacity direct-current conversion switch is realized.

The present application relates to the field of intelligent welding technology, and specifically to a multi-mode heat input coordinated control device for an argon arc welding machine based on sheet metal processing. The device includes: a sheet metal welding quality assessment module: obtaining a welding quality score for each sheet metal; a welding heat input range limitation module: dividing all positions of the same thickness in a sheet metal into one category, and determining the appropriate heat input range corresponding to each working mode in each category; a welding heat input optimization module: constructing an objective function based on the heat input difference between adjacent welding positions of the current sheet metal, and determining the optimal heat input for each welding position under each working mode during the current sheet metal welding; a welding arc voltage control module: determining the welding speed characteristic factor for each position in each category and the interference coefficient for each working mode in each category; obtaining the control coefficient for each working mode, and real-time controlling the arc voltage at each moment under each working mode during the current sheet metal welding. The present application improves the welding quality of sheet metal parts.

The application provides a circuit breaker contact ablation evaluation method and device, electronic equipment and a storage medium. The method comprises the following steps: collecting a test current and a mechanical stroke curve of a hydraulic mechanism pull rod of a to-be-tested circuit breaker during a breaking test of the to-be-tested circuit breaker, and collecting a first arc voltage waveform of a main contact of the to-be-tested circuit breaker and a second arc voltage waveform of an arc contact; evaluating an ablation state of the main contact by using the test current and the first arc voltage waveform; and evaluating an ablation state of the arc contact by using the first arc voltage waveform, the mechanical stroke curve and the second arc voltage waveform. The ablation states of the main contact and the arc contact are evaluated by using the test current, the mechanical stroke curve and the arc voltage waveform, so that the ablation state can be evaluated without causing the circuit breaker to be separated from a normal working state or a test state, and the evaluation efficiency is improved.

The invention relates to the technical field of low-voltage switching devices, in particular to an arc extinguishing device and a circuit breaker. The arc extinguishing device provided by the invention comprises a contact system, an arc extinguishing chamber and an arc running piece, the arc extinguish chamber comprises a plurality of grid sheets, and all the grid sheets are sequentially arranged at intervals to form a grid sheet group; the arc running piece is arranged on one side of the notch of the grid piece group along the arrangement direction of the grid pieces, and the arc running piece is electrically connected with the contact system; at least one bending part is arranged on the arc running piece in the arc running direction of the arc running piece, the bending part protrudes towards the notch side of the grid piece set, and the bending part and the grid pieces form breakdown points. The arc running piece is provided with at least one bending part along the arc running direction, the bending part protrudes towards one side of the notch of the grid piece group and is matched with the grid piece in the arc extinguish chamber to form a breakdown point, an electric arc is guided to be broken down and transferred towards the end part on the arc running piece through the breakdown point, and repeated advance and retreat are avoided, so that the arc voltage can be pulled up more quickly, and the product performance is improved.

The present application relates to a kind of medium voltage DC hybrid circuit breaker in vacuum mechanical switch high arc voltage implementation method, based on the basic principle of natural commutation of DC breaking, form arc voltage promotion method, propose the overall technical scheme based on high arc voltage vacuum fast mechanical switch, provide theory and technical basis for the research and development of natural commutation type medium voltage DC circuit breaker, engineering application.Through external transverse magnetic field (external transverse magnetic field, ETMF) to make up for the shortage of its own magnetic field.When vacuum switch is directly used for low voltage DC breaking, external transverse magnetic field control plays a crucial role.The effect of transverse magnetic field on vacuum arc is to improve the voltage of vacuum arc, force the current of DC loop to zero, thereby realizing the DC breaking of vacuum switch.Improve the rapidity and reliability of current transfer, expand the application scenario of natural commutation mode, improve the arc voltage of fast mechanical switch, improve commutation and breaking performance.

The application discloses a kind of switch arc voltage measuring device and measuring method, measuring device includes measurement capacitor unit, signal acquisition unit and data processing unit;Measurement capacitor unit includes high-voltage arm measurement capacitor and low-voltage arm measurement capacitor;Signal acquisition unit is connected with low-voltage arm measurement capacitor, and it is configured to corresponding acquisition and pre-processing of the voltage signal input to low-voltage arm measurement capacitor;Data processing unit and signal acquisition unit are connected, and it is configured to determine the arc voltage of the break of the switch contact end to be measured according to the voltage signal data after pre-processing, and in combination with the voltage division ratio relationship of high-voltage arm measurement capacitor and low-voltage arm measurement capacitor.The switch arc voltage measuring device and measuring method provided by the application can realize real-time measurement of switch arc voltage by using capacitor voltage division principle, and will not affect the normal work and insulation performance of switch device.