CN106772015A - A kind of low capacity contactor electric life test system and method - Google Patents

A kind of low capacity contactor electric life test system and method Download PDF

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Publication number
CN106772015A
CN106772015A CN201611251984.6A CN201611251984A CN106772015A CN 106772015 A CN106772015 A CN 106772015A CN 201611251984 A CN201611251984 A CN 201611251984A CN 106772015 A CN106772015 A CN 106772015A
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China
Prior art keywords
contactor
voltage
test
contact
load
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Pending
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CN201611251984.6A
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Chinese (zh)
Inventor
林旭光
刘彦彤
周博
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CRRC Changchun Railway Vehicles Co Ltd
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CRRC Changchun Railway Vehicles Co Ltd
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Priority to CN201611251984.6A priority Critical patent/CN106772015A/en
Publication of CN106772015A publication Critical patent/CN106772015A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327Testing of circuit interrupters, switches or circuit-breakers

Abstract

A kind of low capacity contactor electric life test system, including control loop power supply, main circuit power, load, an industrial computer is connected with load, industrial computer connects a voltage-current sensor and drive circuit respectively again, drive circuit connects control loop power supply again, voltage-current sensor is connected with main circuit power again, and main circuit power and control loop power supply are each connected with industrial computer respectively again;Contactor is arranged on test item erecting bed, contactor is connected with voltage-current sensor, drive circuit, main circuit power, load respectively, the main integrated all power supply outputs of test item erecting bed and the input interface of load, while being internally integrated various respective sensors;Test system automatic capability is high, electric life is tested by the decision method of various redundancies is more accurately judged, improves the accuracy rate of test and the reliability of test result.

Description

A kind of low capacity contactor electric life test system and method
Technical field
The invention belongs to contactor electric life test system technical field, it is related to a kind of low capacity contactor electric life to test System and method.
Background technology
Contactor is a kind of very strong self-action device for switching of versatility, is one kind in Electric Traction and automatic control system Important low-voltage electrical apparatus.It can be frequently switched on and disconnect AC and DC main circuit and Large Copacity control circuit.Contactor should With widely, such as the application on high speed motor car.Statistics shows, in current EMUs failure cause, because of electrical equipment unit Part is aging, work is unreliable and causes the system failure to occupy ratio very high.Contactor is using very wide on high speed motor car One important additional device, therefore, in-depth study is carried out to its electric life, to the operation stability and safety of its high speed motor car Property has very important significance.Contactor experiment is the important means for checking contactor quality, wherein, electrical endurance test is weight One of pilot project wanted, the electric life index of contactor can be not only obtained by electric life, and contributes to analysis to contact The reason for device fails, for improve product quality provides important evidence.Therefore, the pilot system of contactor electric life and test side Method is always the key areas of domestic and international electrical equipment academia research.
In contactor life test technology related fields, traditional contactors electric life test system it is main by controlling switch, Pulse signal generator, low capacity relay, counter, load etc. constitute, in this test system control switching electricity the time and The action such as number of times is required for artificial operation, and test operation process is cumbersome.The regulation of load is also required to regulation, the work(of load manually The test parameters such as rate factor, time constant cannot also be directly obtained.Contactor electric life tests traditional scheme also by monolithic Machine integrated technology is controlled to carry out data acquisition with PLC technology, and this scheme is in terms of data acquisition using circulation surface sweeping side Formula, when main circuit goes wrong and needs the program of scanning a lot, main circuit can not timely be protected.Using PLC boards are gathered, and not enough fully, easily by external interference, it is impossible to adopt and pass, data volume is less for isolation, in mass data treatment It is inapplicable with more complicated application treatment aspect.At testing scheme involved by the scheme of existing contactor electric life test Reason job order one, arithmetic speed is slow, is all not carried out in detection a period of time, and major loop two is measured during adhesive and release End and the voltage and current value at main noddle on contactor two ends, it is impossible to obtain corresponding steadying resistance value.It is right in existing method of testing The decision method of electric life is also only a kind of, it is impossible to more accurately judge the failure feelings of contactor test product during electrical endurance test Condition.
The content of the invention
It is an object of the invention to provide a kind of low capacity contactor electric life test system and method, the test system is automatic Change degree is high, experiment process can be automatically performed by industrial computer, halfway without Human disturbance.Using various redundancies Decision method, electric life is tested by voltage decision procedure and resistance and electric current decision procedure is more accurately sentenced It is fixed, improve the accuracy rate of test and the reliability of test result.
For achieving the above object, the present invention provides a kind of low capacity contactor electric life test system, including control Ring current, main circuit power, load, it is characterised in that:An industrial computer is connected with load, industrial computer connects a voltage respectively again Current sensor and drive circuit, drive circuit connect control loop power supply, voltage-current sensor and and main circuit power again It is connected, main circuit power and control loop power supply are each connected with industrial computer respectively again;Contactor is arranged on test item erecting bed On, contactor is connected with voltage-current sensor, drive circuit, main circuit power, load respectively, and test item erecting bed mainly collects The input interface for being exported into all power supplys and being loaded, while being internally integrated various respective sensors;Industrial computer is by bus to master Ring current, control loop power supply and load send and set instruction, are automatically performed the bar of voltage, the setting of electric current and load impedance Part, required to meet the test of contactor electric life, load refers to according to the control that the demand and industrial computer of specific test event send Order carrys out the resistance and inductance value of adjust automatically major loop, obtains different bearing powers and power factor, time constant;Industrial computer The command signal of transmission adhesive or release is supplied by drive circuit to drive circuit, control loop power supply to contactor coil Electricity, the low and high level digital quantity that drive circuit exports industrial computer is converted into the switching value of coil, carrys out the adhesive of control contactor And release;The voltage x current value that voltage-current sensor is gathered between main circuit power voltage and contactor main contacts passes to work The test data of passback is analyzed and processed by control machine, industrial computer, and most result of the test shows and preserves at last.
Described load for manually with intelligent two ways, the aptitude manner of wherein AC load has two kinds, and one kind is straight Connected setting voltage, electric current and power factor to select inductance and resistance value, second is by setting voltage, resistance and electricity Feel calculating power factor;Manual mode is to need to calculate the current value of loading according to test, the electric current for loading as needed Corresponding impedance and induction reactance value are calculated with power factor, corresponding resistance value is then selected.
Present invention also offers a kind of low capacity contactor electric life method of testing, it is characterised in that comprise the following steps:
All parameters required for the 1st, major loop and control loop test are set, starting load, main circuit power, control loop electricity Source;
2nd, main circuit power and control loop power supply and corresponding contactless contactor, all touching of detection circuit docking tentaculum are closed Head is detected that by the way of various judgement redundancies, main criterion is:(1)The contact drop of contact when contact Whether the 5% of contact ring current voltage is exceeded;(2)Whether voltage during contact disjunction between contact is less than contact ring current electricity The 90% of pressure;(3)Detect that the voltage and current at main contacts two ends calculates its contact resistance during contact, whether contact resistance is big Transfinited setting in contact resistance;4)Whether the electric current at contact two ends is more than 0.5mA during contact disjunction.When the contact to contactor enters When any of the above situation occurs during row detection is "Yes", that is, think that the contactor breaks down, repeat detection, when reaching " the expected number of stoppages ", disconnects contactor, records current cycle time, and record data completes test, generation report.
The present invention has following main beneficial effect compared with prior art:
1. the test judgement method of the low capacity contactor electric life test system that the present invention is applied uses various judgement redundancies Decision method.Test of the method that redundancy judges to electric life is accurate, improves the accuracy rate of test.
2. the low capacity contactor electric life test system that the present invention is applied, can be according to experiment by industrial computer control Personnel's pre-sets automatic execution experiment process, halfway without Human disturbance.Industrial computer has good man machine operation interface, The make-and-break time and break-make number of times of contacts of contactor can be automatically controlled, also can directly be sent out to power-supply system and load by industrial computer Send setting to instruct, can automatically, accurately complete the electric life test of AC/DC contactor.
Brief description of the drawings
Fig. 1 is pilot system frame diagram of the present invention;
Fig. 2 is experimental test flow chart of the present invention.
Specific embodiment
Reference picture 1, the present invention includes control loop power supply, main circuit power, industrial computer, drive circuit, load, voltage electricity Flow sensor.Contactor is arranged on test item erecting bed, and voltage sensor and current sensor in test system Binding post is arranged on the backboard inside test item erecting bed, and experiment every time can need to be connected to holding wire according to pilot project Specify binding post.The main integrated all power supply outputs of test item erecting bed and the input interface of load, while being internally integrated voltage Sensor, current sensor, temperature sensor, humidity sensor etc. need for system testing.It is loaded with manual and intelligence two The mode of kind, load is internal control circuit, and inside has contactor and communication device;Work control machine is sensed with voltage x current respectively Device, drive circuit, main circuit power, control loop power supply, load are connected.Voltage-current sensor and contactor, major loop electricity Source, industrial computer are connected.Drive circuit is connected with contactor, industrial computer and control circuit power.Contactor is sensed with voltage x current Device, drive circuit, main circuit power, load are connected.Main circuit power is connected to form survey with the main contacts of contactor and load The major loop of examination.Industrial computer is sent to main power source, control loop power supply and load by bus and sets instruction, is automatically performed electricity The condition of pressure, the setting of electric current and load impedance, it is required to meet the test of contactor electric life, load according to specific test event Demand and the control instruction that sends of industrial computer come the resistance and inductance value of adjust automatically major loop, obtain different bearing powers With power factor, time constant.The command signal of adhesive or release is passed to drive circuit, control loop power supply by industrial computer The instruction for obtaining industrial computer transmission is powered by drive circuit to contactor coil, the height electricity that drive circuit exports industrial computer Flat digital quantity, is converted into the switching value of coil, that is, high level is open-minded, low level shut-off, come control contactor adhesive and Release.Voltage-current sensor gathers the voltage x current value between main circuit power voltage and contactor main contacts and passes to work Control machine, industrial control computer returns the test data of distal end, and benefit reason is analyzed on this basis, and most experiment is tied at last Fruit shows and preserves.Experiment can be suspended in contactor electric life test process or experiment is exited, when the experiment for reaching setting is followed Ring number of times meets " life expectancy device " or the number of stoppages meets " the expected number of stoppages ", and experiment stops, and industrial computer disconnects contact Device simultaneously stops cumulative number, and the numerical value is electric life.If electric life test is time-consuming more long, it may appear that test has to half faces The demand of Shi Jinhang other performance tests, can now suspend experiment, after waiting the interim performance test of completion, continue life test, survey Examination data can continue.
The selection mode of load that the present invention is applied in low capacity contactor electric life test system has manually and intelligence Can two ways, can according to the demand of specific test event to control instruction that industrial computer sends come the electricity of adjust automatically major loop Resistance and inductance value, obtain different bearing powers and power factor, time constant.Compared to the load linearity degree that traditional test is used Good, time control high precision substantially increases operating efficiency, can save the operating time and can meet cycle count requirement. Wherein intelligent load is operated by PC softwares, the resistance of impedance, and inductance is automatically switched using contactor etc., between resistance Replace air switch with contactor.Intelligence has two ways, and for AC load, the first is directly to set voltage x current and work( Rate factor is tested, it is not necessary to calculated.Second is to set voltage resistance and inductance, seeks power factor.Wherein second side Formula is directed to that circuit is long, in system resistance it is more can cause to be applied when measurement result deviation is big, it is necessary to calculate power because Number, the system of choosing can automatically distribute electric current and be loaded, and the parameter for loading calculates very accurate and efficient and convenient.
The operation of main circuit power is man-machine interface in the low capacity contactor electric life test system that the present invention is applied, Display is comprehensive, simple to operate, is interacted using touch screen, with good man-machine interface, can intuitively monitoring device fortune Market condition and fault alarm situation, can check the parameters of power supply, failure logging etc., support remote monitoring.
Reference picture 2, carries out contactor life test under industrial computer control, and its test run process is as follows:
1. main circuit voltage, current-order are set, i.e. " voltage of major loop, electric current are set ";
2. voltage, the electric current of control coil power supply are set, i.e. " control loop voltage, electric current are set ";
3. configuration load parameter, main test parameters includes:Coil control voltage, contact power supply overcurrent protection value, loop electricity Pressure, loop current, the series of contact, pickup time, release time, life expectancy setting, expected failure setting, contact resistance surpass Limit is set;
4. starting load, starts main circuit power, starts control loop power supply;
5. closure main circuit power and the corresponding contactless contactor of control loop power supply, i.e. input power _ enable DO are electric with control Source _ enable DO;
6. sealing voltage sensing switch DO, i.e. voltage detecting _ enable DO;
7. the switch S1, i.e. AC/DC contactor _ control DO of control contactor coil are closed;
8. time delay, length is " pickup time setting ";
9. all contacts of detection circuit docking tentaculum are detected that this test system can at most be detected to 9 groups of contacts;
10. in 40% time of the " on " phase circulated every time in contactor, 9 groups of contact voltages of contact when detection contact is contacted Drop;
11., if the contact drop of contact exceedes the 5% of contact ring current voltage during contact, the number of stoppages adds 1, Perform step 20;
The voltage and current at 12. detection 9 groups of contacts two ends, calculates 9 contact resistances;
More than " contact resistance transfinite settings ", then the number of stoppages adds 1 to 13. contact resistances, execution step 20;
14. disconnect contactor _ control DO;
15. time delays, length is " release time setting ";
In 40% time of 16. " disjunction " phases circulated every time in contactor, voltage during detection contact disjunction between 9 groups of contacts;
If less than the 90% of contact ring current voltage, the number of stoppages adds 1 to voltage during 17. contact disjunction between contact, Perform step 20;
The electric current at 18. detection 9 groups of contacts two ends;
If 19. electric currents are more than 0.5mA, the number of stoppages adds 1;
20. repeat step 7-19, until cycle-index meets " life expectancy setting " or number of stoppages satisfaction " expected failure time Number ";
21. off voltages detect _ enable DO;
22. record current cycle times.Record data;
Complete test, generation report.

Claims (3)

1. a kind of low capacity contactor electric life test system, including control loop power supply, main circuit power, load, its feature It is:An industrial computer is connected with load, industrial computer connects a voltage-current sensor and drive circuit respectively again, and drive circuit is again Connection control loop power supply, voltage-current sensor is connected with main circuit power again, and main circuit power and control loop power supply are again Difference is each connected with industrial computer;Contactor be arranged on test item erecting bed on, contactor respectively with voltage-current sensor, drive Dynamic circuit, main circuit power, load are connected, the input interface of the main integrated all power supply outputs of test item erecting bed and load, It is internally integrated various respective sensors simultaneously;Industrial computer is sent by bus to main circuit power, control loop power supply and load Instruction is set, the condition of voltage, the setting of electric current and load impedance is automatically performed, it is required to meet the test of contactor electric life, The control instruction according to the transmission of the demand and industrial computer of specific test event is loaded come the resistance and inductance of adjust automatically major loop Value, obtains different bearing powers and power factor, time constant;Industrial computer transmits the command signal of adhesive or release to drive Dynamic circuit, control loop power supply is powered by drive circuit to contactor coil, the height electricity that drive circuit exports industrial computer Flat digital quantity is converted into the switching value of coil, comes the adhesive and release of control contactor;Voltage-current sensor gathers major loop Voltage x current value between supply voltage and contactor main contacts passes to industrial computer, and industrial computer carries out the test data of passback Analysis and treatment, most result of the test shows and preserves at last.
2. a kind of low capacity contactor electric life test system according to claim 1, it is characterised in that:Described load For manual with intelligent two ways, the aptitude manner of wherein AC load has two kinds, and one kind is directly by setting voltage, electric current Inductance and resistance value are selected with power factor, second is to calculate power factor by setting voltage, resistance and inductance;Hand Flowing mode is to need to calculate the current value of loading according to test, and the electric current and power factor for loading as needed are calculated accordingly Impedance and induction reactance value, then select corresponding resistance value.
3. a kind of low capacity contactor electric life method of testing according to claim 1, it is characterised in that including following step Suddenly:
(1)Major loop is set with all parameters required for control loop test, starting load, main circuit power, control loop Power supply;
(2)Closure main circuit power and control loop power supply and corresponding contactless contactor, detection circuit dock all of tentaculum Contact is detected that by the way of various judgement redundancies, main criterion is:(1)The contact voltage of contact when contact Whether drop exceedes the 5% of contact ring current voltage;(2)Whether voltage during contact disjunction between contact is less than contact ring current The 90% of voltage;(3)Detect that the voltage and current at main contacts two ends calculates its contact resistance during contact, whether is contact resistance Transfinited setting more than contact resistance;4)Whether the electric current at contact two ends is more than 0.5mA during contact disjunction;When the contact to contactor When any of the above situation occurs when being detected is "Yes", that is, think that the contactor breaks down, repeat detection, when reaching " the expected number of stoppages ", disconnects contactor, records current cycle time, and record data completes test, generation report.
CN201611251984.6A 2016-12-30 2016-12-30 A kind of low capacity contactor electric life test system and method Pending CN106772015A (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN108362955A (en) * 2017-11-30 2018-08-03 中国航空综合技术研究所 A method of dynamic contact element is tested under vibration, load-up condition
CN109828198A (en) * 2019-01-15 2019-05-31 哈尔滨工业大学 A kind of A.C. contactor life prediction module
CN110031756A (en) * 2019-05-30 2019-07-19 西北工业大学青岛研究院 A kind of method of D.C. contactor performance test conversion circuit and life test
CN110678763A (en) * 2017-09-29 2020-01-10 株式会社Lg化学 Contactor failure rate prediction system and method

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110678763A (en) * 2017-09-29 2020-01-10 株式会社Lg化学 Contactor failure rate prediction system and method
CN108362955A (en) * 2017-11-30 2018-08-03 中国航空综合技术研究所 A method of dynamic contact element is tested under vibration, load-up condition
CN108362955B (en) * 2017-11-30 2020-04-07 中国航空综合技术研究所 Method for testing movable contact element under vibration and load conditions
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CN109828198B (en) * 2019-01-15 2021-04-20 哈尔滨工业大学 Service life prediction module of alternating current contactor
CN110031756A (en) * 2019-05-30 2019-07-19 西北工业大学青岛研究院 A kind of method of D.C. contactor performance test conversion circuit and life test
CN110031756B (en) * 2019-05-30 2021-05-18 西北工业大学青岛研究院 DC contactor performance test conversion circuit and service life test method

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