CN1609626A - Testing equipment and control method for electrical endurance (AC-3)of contactor and starter - Google Patents
Testing equipment and control method for electrical endurance (AC-3)of contactor and starter Download PDFInfo
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- CN1609626A CN1609626A CN 200410067753 CN200410067753A CN1609626A CN 1609626 A CN1609626 A CN 1609626A CN 200410067753 CN200410067753 CN 200410067753 CN 200410067753 A CN200410067753 A CN 200410067753A CN 1609626 A CN1609626 A CN 1609626A
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Abstract
The present invention is the electric life test equipment for electromechanical contactor and motor starter and its control method. The test equipment has loop including isolating knife switch, breaker, electromechanical contactor, resistor and reactor, and features that counter parallel thyristors are used as the non-contact switch and that the resistor and the reactor may be regulated to meet the start requirement of the motor. The control process includes the steps of controlling time of CK, controlling time of Cs1, controlling time of CT, controlling time of Cs2, and controlling time of C1.
Description
Technical field
The present invention relates to electric life (AC-3) testing equipment and the control method thereof of a kind of electromechanical treadle and motor starter, belong to low-voltage electrical apparatus experimental technique field.
Background technology
It is the switching device shifter (be commonly called as and accompany test product to claim CK with doffing) of power supply that contactor is adopted in the traditional test loop (as Fig. 1) of the electric life of electromechanical treadle and motor starter (AC-3) test, and its shortcoming is to accompany the breaking capacity of test product to be equivalent to more than 20 times of test product.Yet A.C. contactor development in recent years is very fast, is greatly improved on capacity and operating frequency.Test with the contactor of two 400V 630A is an example, and the manufacturer that has brings up to the frequency of AC-3 1200 times/hour, accompanies the test product will be with the electric current of 2400 times/hour high frequency disjunction 3780A COS=0.35.
The agreement service test of present A.C. contactor is less than ten thousand times also.Will carry out (250A and more than) 600,000 times for what the durability test of an AC-3 had, what have will carry out (250A is following) 1,500,000 times.Above-mentioned AC-3 test just brings the problem of the following aspects: 1, accompany the loss of test product contactor too big, change contactor and bring very big workload.2, the toxic gases such as Agcdo, the taste that produce when disjunction of the contact of contactor is unpleasant and human body had very big injury.3, the noise of the contactor of high frequency action makes the work on the spot ecological deterioration.
With 600,000 times life-spans be example: whenever carry out about 20,000 times test according to present case and change a contactor, add that maintenance can suitably reduce loss, but single test will consume contactor 20-30 platform.If in every contactor is 1500 yuan, the contactor that AC-3 durability test will consume is amounted to Renminbi about 40,000 yuan.In other words, detect in the AC-3 project at present low-voltage electrical apparatus, be equivalent to our test income, therefore do not have the test profit and can say if be invited to be present at a banquet given in honour of a distinguished guest its consumption of test product with contactor, for these reasons, the scrap build of AC-3 high capacity durability test chamber is extremely urgent.
Summary of the invention
The object of the present invention is to provide the electric life AC-3 testing equipment and the control method thereof of a kind of contactor and trigger, this testing equipment and control method thereof are that a kind of test method is easy, testing equipment is difficult for burning, the test method that experimentation cost is low, test efficiency is high.
In order to achieve the above object, technical solution scheme of the present invention is: adopt power electronic element to substitute used contactor as noncontacting switch electrical equipment in the test loop of testing equipment, what this power electronic element is contactless breaker adopted is thyristor, the thyristor trigger pulse adopts the superimposed pulse technology, be equivalent to lasting triggering level is arranged on the door-plate, both guarantee the reliable conducting of thyristor, overcome the voltage glitch phenomenon that zero crossing occurs again, also do not needed the zero passage detection link.To overcome the electrical arc erosion that contactor produces when the big electric current of disjunction, if do AC-3 project when test, just needn't change contactor as before, the experimentation cost of so going down will reduce greatly.The control timing of this invention is represented the control time t of controlled step of the present invention: CK
0, t
1(part), its voltage are Ue, Cs
1Control time t
1, t
2, t
3(part), the control time t of CT
3, t
4, its voltage is 1/6Ue.
Beneficial effect of the present invention: owing in the test loop, adopt the power electronic element thyristor to substitute used contactor as noncontacting switch electrical equipment, to overcome the electrical arc erosion that contactor produces when the big electric current of disjunction, therefore (AC-3) test has overcome contactor and has done problems such as the loss of accompanying test product and causing, poison gas, noise, experimentation cost greatly reduces, the test profit increases substantially, and has bigger economic benefit and social benefit.
Description of drawings
Fig. 1 is a test loop synoptic diagram in the traditional AC-3 testing equipment;
Fig. 2 is a test loop synoptic diagram in the AC-3 testing equipment of the present invention;
Test oscillogram in Fig. 3 AC-3 testing equipment of the present invention;
The control timing figure of Fig. 4 test loop.
Embodiment
Below in conjunction with drawings and Examples to the present invention's detailed description of making comparisons.
With reference to Fig. 1, this is a test loop synoptic diagram in the traditional AC-3 testing equipment.
As shown in Figure 1, the plug-in strip 1 of isolation, isolating switch 2 are arranged in the test loop, what be connected with isolating switch is electromechanical treadle 3,6, and electric life (AC-3) test has two bench teat product usually, and present loop CK CT in one-period will move twice.The operating frequency that is CK is the twice of test product, has so just accelerated the damage of CK.
With reference to Fig. 2, this is a test loop synoptic diagram in the AC-3 testing equipment of inventing.
As shown in Figure 2, in the loop of testing equipment, accompany the position of test product contactor 3,6, adopt the power electronic element thyristor to substitute used contactor as contactless breaker, at the trial, thyristor substitutes used contactor as contactless breaker and will overcome contactor and do problems such as the loss of accompanying test product and causing, poison gas, noise.
Anti-parallel thyristor, to guarantee the all-wave conducting of electric current, with several thyristor parallel connections with the increase capacity.
With reference to Fig. 3, this is to test oscillogram in the AC-3 testing equipment of the present invention.
As shown in Figure 3, a, b, c three-phase voltage, current waveform are as shown in the figure: voltage waveform shown in the Ue, the voltage waveform shown in the 1/6Ue; Current waveform shown in the 6Ie, the current waveform shown in the Ie.
With reference to Fig. 4, this is the control timing figure of test loop of the present invention.
As shown in Figure 4, this control timing is represented the control time t of controlled step of the present invention: CK
0, t
1(part), its voltage are Ue, Cs
1Control time t
1, t
2, t
3(part), C
tControl time t
3, t
4, its voltage is 1/6Ue.The control time t of CT
0, t
1(part), its voltage are Ue, Cs
2Control time t
1, t
2, t
3(part), C
tControl time t
3, t
4, its voltage is 1/6Ue.
Its principle of work of following simple declaration:
The test features of the electrical endurance test of electromechanical treadle and motor starter has two particular points: 1, the starting current of squirrel cage asynchronous motor is bigger.2, squirrel cage asynchronous motor is in operation and significantly decreased by the voltage that influences port of reverse potential when disconnecting.In order to simulate actual situation, adopt test test circuit figure as Fig. 2, regulating load (resistor in series air reactor) make the electric current under the rated voltage be 6Ie (Ie: the rated current of test product), to satisfy the start request of motor.By the switching in loop, make test product disjunction rated current Ie under 0.17Ue voltage, with the situation of the disconnection in service of simulated machine.Under control, can obtain test effect as Fig. 3 as the control timing of Fig. 4.The starting and stopping situation basically identical of motor in this situation and the actual motion.
Claims (5)
1. electric life (AC-3) testing equipment of electromechanical treadle and motor starter, comprise isolate plug-in strip (1), isolating switch (2) in the test loop, accompany test product contactor (3), (6), resistor (4) and reactor (5), it is characterized in that:
Described test product contactor (3), (6) of accompanying are located, adopt power electronic element to substitute as noncontacting switch electrical equipment, this test circuit scalable loading resistor (4) and series connection air reactor (5), make that the electric current under the rated voltage is 6Ie, to satisfy the start request of motor, by the switching in loop, make test product disjunction rated current Ie under 0.17Ue voltage, with the situation of the disconnection in service of simulated machine.
2. electric life (AC-3) testing equipment of electromechanical treadle as claimed in claim 1 and motor starter is characterized in that:
Described power electronic element is a kind of thyristor.
3. as electric life (AC-3) testing equipment of claim 1 or 2 electromechanical treadles and motor starter, it is characterized in that:
Described thyristor adopts inverse parallel, guarantees the all-wave conducting of electric current, with several thyristor parallel connections with the increase capacity.
4. the control method of the electric life (AC-3) of contactor and trigger, this control timing is represented the control time t of controlled step of the present invention: CK
0, t
1(part), its voltage are Ue, Cs
1Control time t
1, t
2, t
3(part), C
tControl time t
3, t
4, its voltage is 1/6Ue.The control time t of CT
0, t
1(part), its voltage are Ue, Cs
2Control time t
1, t
2, t
3(part), C
tControl time t
3, t
4, its voltage is 1/6Ue.
5. electric life (AC-3) testing equipment of electromechanical treadle as claimed in claim 1 and motor starter is characterized in that:
Described thyristor trigger pulse adopts the superimposed pulse technology, and being equivalent to has lasting triggering level on the gate pole, both guaranteed the reliable conducting of thyristor, has overcome the voltage glitch phenomenon that zero crossing occurs again, does not also need the zero passage detection link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067753 CN1609626A (en) | 2004-11-03 | 2004-11-03 | Testing equipment and control method for electrical endurance (AC-3)of contactor and starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067753 CN1609626A (en) | 2004-11-03 | 2004-11-03 | Testing equipment and control method for electrical endurance (AC-3)of contactor and starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1609626A true CN1609626A (en) | 2005-04-27 |
Family
ID=34765115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410067753 Pending CN1609626A (en) | 2004-11-03 | 2004-11-03 | Testing equipment and control method for electrical endurance (AC-3)of contactor and starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1609626A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328591C (en) * | 2005-12-26 | 2007-07-25 | 通领科技集团有限公司 | Earth-fault circuit breaker life termination detecting-protecting method and its circuit |
| CN106872889A (en) * | 2017-03-20 | 2017-06-20 | 北京航天自动控制研究所 | A kind of fault detection method of sequential export device and device |
| CN114217217A (en) * | 2021-12-15 | 2022-03-22 | 极氪汽车(宁波杭州湾新区)有限公司 | Switching dynamic characteristic test circuit and system of inverter |
-
2004
- 2004-11-03 CN CN 200410067753 patent/CN1609626A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328591C (en) * | 2005-12-26 | 2007-07-25 | 通领科技集团有限公司 | Earth-fault circuit breaker life termination detecting-protecting method and its circuit |
| CN106872889A (en) * | 2017-03-20 | 2017-06-20 | 北京航天自动控制研究所 | A kind of fault detection method of sequential export device and device |
| CN106872889B (en) * | 2017-03-20 | 2019-04-09 | 北京航天自动控制研究所 | A kind of fault detection method of sequential export device and device |
| CN114217217A (en) * | 2021-12-15 | 2022-03-22 | 极氪汽车(宁波杭州湾新区)有限公司 | Switching dynamic characteristic test circuit and system of inverter |
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