CN104062521A - Arc motion generating device - Google Patents
Arc motion generating device Download PDFInfo
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- CN104062521A CN104062521A CN201410125121.9A CN201410125121A CN104062521A CN 104062521 A CN104062521 A CN 104062521A CN 201410125121 A CN201410125121 A CN 201410125121A CN 104062521 A CN104062521 A CN 104062521A
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Abstract
The invention relates to an arc motion generating device. The arc motion generating device comprises a monitoring device, a control device, an acquiring device and a charge-discharge body; the charge-discharge body is arranged to be a single-frequency oscillation circuit composed of an LC (inductor and capacitor); the acquiring device consisting of a charge acquiring unit and a discharge acquiring unit is connected with the charge-discharge body and used to acquire the instantaneous charge and discharge waveforms of the charge-discharge body; the control device is connected with the charge-discharge body and used to control charge and discharge of the charge-discharge body; the monitoring device is connected with the control device and the acquiring device and used to monitor and control the control device and the acquiring device. According to the technical scheme, the arc motion generating device is able to observe the arc motion, and thus the study on arc features can be deepened, and the performance of a low-voltage electric appliance can be improved.
Description
Technical field
The present invention relates to a kind of arc motion generating means, particularly a kind of generating means that is used for observing arc motion.
Background technology
The generation of electric arc has a significant impact the safe operation of low-voltage electrical apparatus.First, electric arc has extended the time that circuit cut-offs short-circuit current.In the time of switch disjunction short-circuit current, the electric arc on switch contact has just extended short-circuit current by the time of circuit, makes the time lengthening of short-circuit current harm, and this may cause larger damage to circuit arrangement.Meanwhile, the high temperature of electric arc may burn out the contact of switch, burns electrical equipment and leader cable, even may cause fire and explosion accident.In addition, strong electric arc may damage people's eyesight, and serious may cause people blind.Therefore when switchgear will ensure its operation in structural design, arc energy is promptly extinguished.The design of arc quenching system just be unable to do without the research and analysis to arc characteristic so, and the arc motion generator that this project is designed, just has sizable meaning to the research of arc characteristic.
In low-voltage electrical apparatus interrupting process, in the time breaking down electric current in circuit, the contact of low-voltage electrical apparatus is promptly opened, between contact, produce electric arc, electric arc is slightly stagnated, under the effect of external magnetic field and aerodynamic force, move to grid sheet along guide rail, electric arc is divided into several short arcs by grid sheet subsequently, causes arc voltage sharply to raise, and electric arc extinguishes thereupon.Can be that electric arc arrives grid sheet rapidly, being extinguished be reliably a major criterion evaluating low-voltage electrical apparatus performance.And the motion of electric arc directly affects the break performance of low-voltage electrical apparatus.If can electric arc be observed, just can more in depth study arc characteristic and improve the performance of low-voltage electrical apparatus.The motion process of electric arc in arc-chutes, is that airflow field, electric field, magnetic field and a thermal field intercouple, coefficient complicated phenomenon.If can arc motion be observed in reality, just can more in depth study arc characteristic and improve the performance of low-voltage electrical apparatus.
Summary of the invention
The deficiency existing for prior art, the object of the present invention is to provide one to observe arc motion, more in depth to study arc characteristic and to improve the arc motion generating means of the performance of low-voltage electrical apparatus.
For achieving the above object, the invention provides following technical scheme: a kind of arc motion generating means, comprise supervising device, control device, harvester and discharge and recharge body, described in discharge and recharge the single-frequency oscillation circuit that body is set to be made up of LC; Described harvester comprises charging collecting unit and electric discharge collecting unit, and discharges and recharges body and is connected, to discharging and recharging this bulk charging, the waveform acquisition of the moment of discharging; Described control device with discharge and recharge body and be connected, charge to discharging and recharging body, control of discharge; Described supervising device is connected with control device and harvester respectively, and control device and harvester are carried out to monitoring and controlling.
The present invention further arranges: described control device comprises PLC controller, D/A modular converter, proportional integral circuit, pressure regulator and transformer, described PLC controller is connected with supervising device, described D/A modular converter is connected with PLC controller, described proportional integral circuit is connected with D/A modular converter, described pressure regulator is connected with proportional integral circuit, and described transformer is connected with described pressure regulator.
The present invention further arranges: described charging collecting unit comprises bleeder circuit, differential amplifier circuit, negater circuit and A/D change-over circuit, described bleeder circuit is connected with described differential amplifier circuit, described negater circuit is connected with described differential amplifier circuit, described A/D change-over circuit is connected with negater circuit, and described supervising device is connected with described A/D change-over circuit.
The present invention further arranges: described electric discharge collecting unit comprises impulse current generator, load, vacuum switch, Luo-coil, high-speed data acquisition terminal, and described high-speed data acquisition terminal is connected with described supervising device.
The present invention further arranges: described supervising device comprises KingView monitoring and LabVIEW monitoring interface.
The present invention further arranges: between described supervising device and harvester, be provided with photoelectricity isolated location between supervising device and control device.
Technical solution of the present invention, an arc motion generating means that adopts LC oscillation circuit to design, the electric arc of generation energy constraint at the volley, can not burn test product, ensures the operability of arc motion experiment; This device utilizes LC oscillation circuit to produce pulse current, when test, electrical network is not impacted, and applies more convenient.Arc motion generator technology is applied in big-and-middle-sized low-voltage electrical apparatus manufacturer, will be conducive to the transfer and upgrade of low-voltage electrical apparatus.
Below in conjunction with accompanying drawing, the invention will be further described.
Brief description of the drawings
Fig. 1 is embodiment of the present invention overall block-diagram;
Fig. 2 is embodiment of the present invention main circuit schematic diagram;
Fig. 3 is the control of embodiment of the present invention charging voltage and charging voltage Acquisition Circuit block scheme;
Fig. 4 is embodiment of the present invention proportional integral circuit diagram;
Fig. 5 is embodiment of the present invention dividing potential drop, low pressure adjusting, differential amplification and negater circuit figure;
Fig. 6 is embodiment of the present invention electric discharge collecting unit circuit diagram;
Fig. 7 is that the embodiment of the present invention discharges and recharges body schematic diagram.
Embodiment
Referring to accompanying drawing 1 to 7, arc motion generating means disclosed by the invention comprises supervising device, control device, harvester and discharges and recharges body.Supervising device is made up of KingView monitoring and LabVIEW monitoring interface, realizes the monitoring and controlling to slave computer; Control device is by PLC composition of the control system, realizes the control that discharges and recharges of paired pulses generator; Harvester is made up of charging collecting unit and electric discharge collecting unit, realizes the paired pulses generator waveform acquisition of generating moment, and is shown and stored by LabVIEW; Discharge and recharge the single-frequency oscillation circuit that body is made up of LC, realize charging energy-storing and electric capacity and the electric discharge of inductance composition oscillation circuit of electric capacity.Between LabVIEW man-machine interface and PLC and between LabVIEW and Acquisition Circuit, all adopt photoelectricity isolation, this makes control system have good interference free performance, and has avoided earth potential the device damage that factor may cause such as to raise.
Arc motion generating means can be divided into two processes of charging and discharging, charging process: first host computer sends charging instruction to PLC, PLC controls charge switch closure after receiving instruction, make low-voltage alternating current power supply after bridge rectifier is filtered into low-voltage dc power supply, start that storage capacitor is started to charging after transformer boosts, storage capacitors starts storage power.Discharge process: in the time that charging voltage reaches setting value, PLC first controls charge switch and disconnects, and stops charging, then controls vacuum switch closure is that the single-frequency oscillation circuit of storage capacitor and inductance composition is to load discharge.The waveform of electric discharge, after Acquisition Circuit and waveform processing circuit, is stored by LabVIEW.
Referring to accompanying drawing 2, the main circuit of arc motion generating means is through 40A circuit breaker Q S by 380V three-phase alternating current, pass through again 40A fuse, pass through again 40A contactor KM, pass through again the novel contact type voltage regulator of TSGC2-20KVA 380/0 ~ 420V 30/27.5A of 1KT, make its voltage adjustable continuously between 0 ~ 420V, and then the dry-type transformer of the ZSG-21KVA 400/1500V 30.3/8.08A of process 1T, make the three-phase alternating current of 400V boost to the three-phase alternating current of 1500V, and then through three-phase bridge rectification filtering, becoming direct current charges to capacitor group C2, in the time being flushed to the voltage setting, disconnect K1, closed K2, make capacitor group C2 and inductance L composition single-frequency oscillation circuit to load discharge.
Referring to accompanying drawing 3, set charging voltage numerical value by LabVIEW man-machine interface, LabVIEW sends charging instruction to PLC, PLC controls D/A modular converter, through D/A modular converter, to proportional integral circuit, proportional integral circuit control pressure regulator, makes pressure regulator export suitable voltage, make transformer boost to suitable voltage, charging acquisition system comprises voltage divider, differential amplifier circuit, A/D change-over circuit and negater circuit.Voltage in charging circuit in capacitor group through voltage divider dividing potential drop, differential amplifier circuit amplify, again by A/D change-over circuit, the magnitude of voltage on capacitor is presented on the monitoring interface of LabVIEW.Charging acquisition system adopts the scheme of close-loop feedback to eliminate the deviation of charging voltage and charging function.
Referring to accompanying drawing 4, DAC7611 is 12 D/A conversion chips of a high-performance.DAC7611 is serial, takies I/O mouth less, and low in energy consumption, performance meets the demands.DAC7611 is connected with PLC, and the amplifying circuit of outputting analog signal, and concrete connection is: CS(2 pin) be connected and do chip selection signal with PLC; CLK(3 pin) be connected and do clock signal with PLC; SDI(4 pin) be connected with PLC and do serial signal input port; LD(5 pin) be connected with PLC and do download gating signal; CLR(6 pin) be connected with PLC and do asynchronous resetting signal.DAC7611 output voltage signal is amplified to potentiometer through amplifying circuit and regulates ratio and integrating amplification circuit.Resistance R 26, R28, R30, C15 and amplifier U9B proportion of composing integrating circuit, resistance R 31, R32 and amplifier U9C proportion of composing amplifying circuit.
Referring to accompanying drawing 5, arc motion generating means adopts RC divider as bleeder circuit, and according to RC divider project organization, R24 is high-voltage arm resistance, and R25 is low-voltage arm resistance, with capacitor C 24 and C25 and be unified into RC network and realize a point compression functions.Low pressure regulating circuit adopts linear dividing potential drop to regulate DC low-voltage, the linear bleeder circuit that resistance R 1, R2 and R3 composition intrinsic standoff ratio are adjustable, and the series network of R4, C1 and R5, C2 composition two-way voltage signal, for suppressing the series mode interference of circuit.R6, R7 and C3 form symmetrical parallel network, for suppressing the common mode interference of circuit.U1, U2 adopt voltage isolation amplifier AD202, in the reverse place in circuit of diode V1, V2, V3 and V4, for preventing surge voltage damage amplifier.Differential amplifier circuit is realized by differential amplifier AD629.The input voltage of negater circuit is from the output voltage of differential amplifier circuit, for changing the polarity of charging feedback voltage, for proportional integral circuit provides feedback signal.
Referring to accompanying drawing 6, electric discharge collecting unit is made up of 9215 and 9162 high-speed data acquisition terminals and the LabVIEW of pulse producer, load, vacuum switch, Luo-coil, NI company.PLC is by Electric Machine Control vacuum switch, and before electric discharge, pulse producer is in charged state, and PLC controls motor disconnects vacuum switch, and capacitor group is in charged state; After charging finishes, PLC controls motor and makes vacuum switch closure, and the voltage in capacitor group is by conductor abrupt release; Discharge off, PLC controls vacuum switch again disconnects loop.Electric discharge acquisition system realizes collection and the demonstration to discharge signal.To the collection of voltage signal, system adopts the scheme of step-down, decay, collection, and high pressure will be first low pressure through voltage divider, and low pressure is being gathered by 9215 and 9162 high-speed data acquisition terminals of NI company after decay.To the collection of current signal, system adopts the method for indirectly measuring: the precision resistance (shunt) that resistance is very little of connecting in Acquisition Circuit.9215 and 9162 high-speed data acquisition terminals of NI company, there are 16 Bit Data Acquisition Systems, can carry out time scale to voltage and current waveform, and waveforms amplitude, polarity, time etc. are carried out translation, the operation such as move up and down, also can carry out waveform comparison, can also read in real time the measurement data of each passage, and on computer interface display waveform curve.
Referring to accompanying drawing 7, utilize metallization film capacitor 2500 μ F/2000V, composition capacity 0.5F/2000V, natural inductance is less than 100nH, the impulse capacitor group that loss is less than 0.15%.Capacitor adopts the fixing mode in both sides rack-mount, adopts bolt to be fixedly connected with between adjacent stent.Device is made up of 4 group framves, and each group of frame assembled by 45 MKMJ2-2500 capacitors, three layers of point upper, middle and lowers, and device amounts to 180 products.Holding circuit adopts fastp-acting fuse, carries out distributed protection and ground connection, and protective device arranges overvoltage and overcurrent protection, and condenser voltage stops charging after exceeding setting voltage.Bilateral electric discharge device can be revealed capacitor residual charge by stake resistance extremely or after off-test in charging process, one group of earthing device for every group capacitor; The equal position sensor of earthing device, stake resistance: 200
/ group, power 20kW, improves equipment safety in operation and reliability.4 groups of reactors, every group of inductance 10 μ H, version: hollow reactance, insulation against ground voltage 10kVDC, rated current 50kA/50ms, fastening structure reinforcement is carried out at two ends, can bear 50ms50KA alternating current stress impact, reactor can move by serial or parallel connection, combination different induction value.
Claims (6)
1. an arc motion generating means, is characterized in that: comprise supervising device, control device, harvester and discharge and recharge body, described in discharge and recharge the single-frequency oscillation circuit that body is set to be made up of LC; Described harvester comprises charging collecting unit and electric discharge collecting unit, and discharges and recharges body and is connected, to discharging and recharging this bulk charging, the waveform acquisition of the moment of discharging; Described control device with discharge and recharge body and be connected, charge to discharging and recharging body, control of discharge; Described supervising device is connected with control device and harvester respectively, and control device and harvester are carried out to monitoring and controlling.
2. arc motion generating means according to claim 1, it is characterized in that: described control device comprises PLC controller, D/A modular converter, proportional integral circuit, pressure regulator and transformer, described PLC controller is connected with supervising device, described D/A modular converter is connected with PLC controller, described proportional integral circuit is connected with D/A modular converter, described pressure regulator is connected with proportional integral circuit, and described transformer is connected with described pressure regulator.
3. arc motion generating means according to claim 2, it is characterized in that: described charging collecting unit comprises bleeder circuit, differential amplifier circuit, negater circuit and A/D change-over circuit, described bleeder circuit is connected with described differential amplifier circuit, described negater circuit is connected with described differential amplifier circuit, described A/D change-over circuit is connected with negater circuit, and described supervising device is connected with described A/D change-over circuit.
4. arc motion generating means according to claim 3, it is characterized in that: described electric discharge collecting unit comprises impulse current generator, load, vacuum switch, Luo-coil, high-speed data acquisition terminal, described high-speed data acquisition terminal is connected with described supervising device.
5. according to the arc motion generating means described in claim 1 or 2 or 3 or 4, it is characterized in that: described supervising device comprises KingView monitoring and LabVIEW monitoring interface.
6. arc motion generating means according to claim 5, is characterized in that: between described supervising device and harvester, be provided with photoelectricity isolated location between supervising device and control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410125121.9A CN104062521A (en) | 2014-03-31 | 2014-03-31 | Arc motion generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410125121.9A CN104062521A (en) | 2014-03-31 | 2014-03-31 | Arc motion generating device |
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| CN104062521A true CN104062521A (en) | 2014-09-24 |
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| CN201410125121.9A Pending CN104062521A (en) | 2014-03-31 | 2014-03-31 | Arc motion generating device |
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Citations (7)
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| CN102253293A (en) * | 2011-05-30 | 2011-11-23 | 南京航空航天大学 | Detection method and device of direct current arc faults |
| CN102435800A (en) * | 2011-11-07 | 2012-05-02 | 四川中物海通特种电源有限责任公司 | High-voltage pulse generator |
| CN102967826A (en) * | 2012-11-05 | 2013-03-13 | 中国电力科学研究院 | Test method for electric endurance of switching capacitor set beaker of extra-high voltage project |
| US20140084827A1 (en) * | 2011-05-26 | 2014-03-27 | Robert Bosch Gmbh | Method and apparatus for operating a power output stage |
| CN203858307U (en) * | 2014-03-31 | 2014-10-01 | 温州大学 | Arc motion generating device |
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2014
- 2014-03-31 CN CN201410125121.9A patent/CN104062521A/en active Pending
Patent Citations (7)
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| US20080238594A1 (en) * | 2005-09-09 | 2008-10-02 | Jinping Liu | Low-Power Numerically Controlled Contactor and Control System Made of the Contactors |
| CN101556306A (en) * | 2009-05-07 | 2009-10-14 | 西安交通大学 | Switch apparatus back-arc medium recovery strength nanosecond continuous pulse measuring device and method thereof |
| US20140084827A1 (en) * | 2011-05-26 | 2014-03-27 | Robert Bosch Gmbh | Method and apparatus for operating a power output stage |
| CN102253293A (en) * | 2011-05-30 | 2011-11-23 | 南京航空航天大学 | Detection method and device of direct current arc faults |
| CN102435800A (en) * | 2011-11-07 | 2012-05-02 | 四川中物海通特种电源有限责任公司 | High-voltage pulse generator |
| CN102967826A (en) * | 2012-11-05 | 2013-03-13 | 中国电力科学研究院 | Test method for electric endurance of switching capacitor set beaker of extra-high voltage project |
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Non-Patent Citations (1)
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| 郑秋辰: "基于labview与PLC的合成回路试验系统智能化研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
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Application publication date: 20140924 |
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