CN202837437U - Test system for carrying out diagnostic test on power unit - Google Patents
Test system for carrying out diagnostic test on power unit Download PDFInfo
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- CN202837437U CN202837437U CN 201220490980 CN201220490980U CN202837437U CN 202837437 U CN202837437 U CN 202837437U CN 201220490980 CN201220490980 CN 201220490980 CN 201220490980 U CN201220490980 U CN 201220490980U CN 202837437 U CN202837437 U CN 202837437U
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Abstract
The utility model discloses a test system for carrying out a diagnostic test on a power unit. According to the technical scheme of the utility model, a 24V low direct current voltage or the like is used as the direct current bus voltage of the power unit, which enables a tester to carry out the test under safe voltage, and ensures safety of the tester. In addition, the test system is simple in structure, adopts an electric reactor as the load of the power unit, is comparatively low in actual power consumption when the dynamic load current is realized, and reduces the test cost.
Description
Technical field
The utility model relates to the industrial drives field, a kind of test macro that power cell is carried out diagnostic test of special design.
Background technology
In the industrial drives field, electric driver is the electrical equipment of widespread use, and torque, speed and the position etc. that are mainly used in motor are controlled, to realize the driving to corresponding plant equipment.Described electric driver includes but not limited to, one or more in frequency converter, the inverter.Therefore, electric driver being diagnosed and tested is to improve the operational reliability of commercial unit and the important means of maintenance efficiency.
In electric driver, power cell is nucleus equipment, also may be the highest part of failure rate.In power cell, mainly comprise power model and corresponding driving circuit such as the IGBT module, also may comprise the capacitance group of direct current intermediate link etc.
Power cell being with when carrying test, because there is higher voltage (for example 600V or 400V) in its DC side, test and maintainer's safety had potential danger.
In the prior art, a kind of mode is operating personnel in the situation of electric driver outage, utilizes multimeter to detect the power cell of electric driver.The manual operations of this method, fairly simple, however because relevant resistance that can only testing power module, and judge the quality of power model with this, so means of testing is limited, can not dynamically be with power cell to carry test.
In addition, in the prior art, the mode that has also proposed a kind of high power constant-current source is come power model is with a year test, and this mode can produce larger electric current in power device.Yet this mode only only limits to the static load testing current, can't realize the dynamic load testing current.
Therefore, expectation proposes a kind of scheme that can carry out the dynamic load testing current under safe voltage to power cell, so that the tester can more safely carry out diagnostic analysis to the trouble spot in the power cell.
The utility model content
In view of this, the utility model proposes a kind of test macro that under safe voltage, power cell is carried out the dynamic load testing current, so that both guaranteed tester's safety, can reduce testing cost again, guarantee the authenticity of dynamic load testing current.
According to an embodiment of the present utility model, a kind of test macro that power cell is carried out diagnostic test has been proposed, comprise frame, it is characterized in that, reserved on the described frame for the position that power cell to be tested is installed, and be furnished with following assembly: the AC/DC rectification unit, its input end is connected to alternating-current voltage source, and its output terminal is connected to the dc bus of power cell to be tested; Control module is connected to power cell to be tested, is configured to export the control signal be used to driving power cell to be tested.
Preferably, according to an embodiment of the present utility model, on described frame, also arrange load unit, be connected to the output terminal of power cell to be tested.
Preferably, according to an embodiment of the present utility model, wherein, described AC/DC rectification unit output 24V DC voltage.
Preferably, according to an embodiment of the present utility model, wherein, described load unit is the load reactance device.
Preferably, according to an embodiment of the present utility model, wherein, described control module is configured to control the variable voltage of the power cell output fixed frequency of testing to described load reactance device.
Preferably, according to an embodiment of the present utility model, wherein, described fixed frequency is 50Hz.
Preferably, according to an embodiment of the present utility model, wherein, be provided with a plurality of draw-in grooves or hole in frame, be convenient to mount and dismount each assembly of arranging in frame.
Preferably, according to an embodiment of the present utility model, wherein, also be furnished with testing cassete on the described frame, be used for exporting the analog quantity control signal to the power cell of testing separately or in conjunction with controller.
Preferably, according to an embodiment of the present utility model, wherein, described power cell to be tested comprises power model and corresponding driving circuit.
Preferably, according to an embodiment of the present utility model, wherein, described control module also disposes one or more cable interfaces, in order to be connected to for the display panel of man-machine interaction and at least one of PC.
Preferably, according to an embodiment of the present utility model, wherein, also be furnished with heat abstractor on the described frame, be used for the heat generating component on the frame is dispelled the heat.
According to technique scheme of the present utility model, utilized such as the low dc voltage of the 24V voltage as the dc bus of power cell, so that the tester tests, guaranteed tester's security under safe voltage.In addition, this test system structure is simple, and adopts reactor as the load of power cell, and when realizing the dynamic load electric current, the actual power consumption amount is relatively less, has reduced testing cost.
In addition, owing to utilize the mode of card or groove and so on to be installed in each assembly of arranging on the frame, so that it is more convenient to change assembly, goes for the test of the power cell of different capacity grade, and improved the work efficiency to batch testing.
Description of drawings
The below will make clearer above-mentioned and other feature and advantage of the present utility model of those of ordinary skill in the art by describe preferred embodiment of the present utility model in detail with reference to accompanying drawing, in the accompanying drawing:
Fig. 1 shows the structural representation for the test macro that power cell is tested according to an embodiment of the present utility model;
Fig. 2 shows the structural representation for the test macro that power cell is tested according to another embodiment of the present utility model;
Fig. 3 shows the block diagram according to the major part of the control module in the test macro of the present utility model;
Fig. 4 shows the exemplary link topology according to the power model to be tested of test macro of the present utility model;
Fig. 5 shows the variable voltage signal according to the control module output of test macro of the present utility model; And
Fig. 6 shows when adopting test macro of the present utility model that the power cell of frequency converter is tested, corresponding voltage current waveform on the load reactance device of collection.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below utilize embodiment that the utility model is further described.
Referring to Fig. 1, according to an embodiment of the present utility model, AC/DC rectification unit 2, control module 3 that test macro mainly comprises frame 1, arranges in frame 1.Wherein, on the frame 1 can be arrange a plurality of draw-in grooves or hole, be convenient to backboard or base plate that each assembly of installing on it is changed, and reserved the installation site for power cell to be tested.As shown in Figure 2, the control module 3 of installing in frame 1 can comprise detection/sampling unit 31, signal processing unit 32, signal output unit 33 etc.The various signals that 31 detections of detection/sampling unit and sampling are relevant with power cell are such as the temperature of power model in the electric current of the DC voltage that is input to dc bus, power cell output, the power cell etc.; The signals such as electric current and voltage of 32 pairs of feedbacks of signal processing unit carry out the various processing such as the A/D conversion process, calculate corresponding steering order, and output it to signal output unit 33; Signal output unit 33 generates various control signals according to corresponding steering order, and to power cell output drive control signal to be tested, such as PWM (width modulation) signal, the operation of power ratio control unit.AC/DC rectification unit 2 also has been installed on frame 1, such as the 380V/24V rectification unit, is provided the 24V DC voltage to the dc bus of power cell to be tested 4.According to embodiment of the present utility model, preferably, on the frame 1 of test macro, can also arrange load unit 5, as shown in Figure 2.Certainly, as the case may be, such as the space layout of frame, also load unit 5 can be arranged in outside the frame separately.Power cell 4 to be tested is installed to the position of reserving on the frame, and its output terminal is connected to load unit 5, the AC voltage after the load unit 5 output inversions.Preferably, power cell can comprise IGBT or power of controlled silicon module and corresponding driving circuit.Consider that some power cell can produce under-voltage and report to the police when dc voltage is low, therefore those skilled in the art can adopt variety of way to shield this warning, for example, can be used to arrange the dry run function, perhaps utilize this under-voltage of hardware shield to report to the police, so that power cell normally moves.
In actual industrial driving situation, the general direct-driving motor operation of power cell.In the test macro of embodiment of the present utility model, preferably adopt the reactor as the load of power cell, the electric current output when not only having simulated the drive motor operation has also avoided drive motor tested the problems such as the stall that may occur, vibrations.
According to embodiment of the present utility model, preferably, control module 3 can be configured to control the power cell 4 of testing and export variable voltages to load unit 5.When adopting reactor as the load of power cell, control module 3 can be configured to control the power cell tested to the variable voltage of the fixed frequency of load unit output such as 50Hz, figure 4 illustrates the synoptic diagram of this situation.Owing to adopted fixed frequency, the output reactance of load reactance device remains unchanged basically, and the electric current that produces mainly is reactive current, and namely the capacitance group of the DC link of power cell and load reactance device constantly exchange quadergy, so the actual power consumption amount is less.
In embodiment of the present utility model, preferably, can also be furnished with testing cassete (not shown in Figure 1) on the frame 1.Described testing cassete can send steering order to power cell to be tested individually or in conjunction with control module, such as utilizing knob on the testing cassete can provide the size of the AC magnitude of voltage of power cell output, or utilize the switch on the testing cassete can provide startup, stop signal, so that corresponding operation is carried out in the power ratio control unit.
In embodiment of the present utility model, preferably, can dispose one or more cable interfaces such as Ethernet interface, USB interface on control module 3 or the frame 1, perhaps wave point, so that wire/wireless is connected on relevant display panel or the PC, so that can show the off status parameter or for the tester relevant controlling parameters is set to the tester.In addition, can also arrange analog or digital display instrument in frame, in order to directly show output current or voltage and other parameters of power model.
According to embodiment of the present utility model, preferably, can arrange heat abstractor in frame, blower fan for example is in order to carry out cooling heat dissipation to the heat generating component on the frame.
Fig. 5 be test macro of the present utility model when test frequency converter's power cell, the relevant voltage of collection, current signal.Because frequency is arranged on 50Hz, the output reactance of load reactance device remains unchanged substantially.When progressively regulation voltage comes the electric current of regulating power unit output, adopting high-power 24V power supply, for example output-current rating is in the situation of 380V/24V AC/DC rectification unit of 40A, practical impedance according to the load reactance device, can export up to the output current more than the 100A, and voltage current waveform and the actual conditions of output are basically identical, have not only realized the dynamic load testing current to power cell, have also guaranteed the authenticity of simulation test.
In sum, the low dc voltage of test macro utilization of the present utility model such as 24V is as the voltage of the dc bus of power cell to be tested, so that the tester can carry out various tests to power cell under the voltage conditions of safety, guaranteed tester's safety; Simultaneously, test macro of the present utility model utilizes the load reactance device as the load of power cell to be tested, can realize the dynamic test of load current, thus running environment that is virtually reality like reality.
In addition, owing to utilize the mode in draw-in groove or hole and so in frame each assembly to be installed, so that the replacing of assembly is more convenient, go for the test of the power cell of different capacity grade, and improved the work efficiency to batch testing.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. the test macro that power cell is carried out diagnostic test comprises frame, it is characterized in that, has reserved on the described frame to be used for the position of power cell to be tested is installed, and has been furnished with following assembly:
The AC/DC rectification unit, its input end is connected to alternating-current voltage source, and its output terminal is connected to the dc bus of power cell to be tested; And
Control module is connected to power cell to be tested, is configured to export the control signal be used to driving power cell to be tested.
2. test macro according to claim 1 is characterized in that, has also arranged load unit on the described frame, is connected to the output terminal of power cell to be tested.
3. test macro according to claim 1 is characterized in that, described AC/DC rectification unit output 24V DC voltage.
4. test macro according to claim 2 is characterized in that, described load unit is the load reactance device.
5. test macro according to claim 4 is characterized in that, described control module is configured to control the variable voltage of the power cell output fixed frequency of testing to described load reactance device.
6. test macro according to claim 5 is characterized in that, described fixed frequency is 50Hz.
7. each described test macro is characterized in that according to claim 1-6, is provided with a plurality of draw-in grooves or hole on the described frame, is convenient to mount and dismount each assembly of arranging in frame.
8. each described test macro is characterized in that according to claim 1-6, also is furnished with testing cassete on the described frame, is used for exporting the analog quantity control signal to the power cell of testing separately or in conjunction with controller.
9. each described test macro is characterized in that according to claim 1-6, and described power cell to be tested comprises power model and corresponding driving circuit.
10. each described test macro is characterized in that according to claim 1-6, and described control module also disposes one or more cable interfaces, in order to be connected to for the display panel of man-machine interaction and at least one of PC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220490980 CN202837437U (en) | 2012-09-24 | 2012-09-24 | Test system for carrying out diagnostic test on power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220490980 CN202837437U (en) | 2012-09-24 | 2012-09-24 | Test system for carrying out diagnostic test on power unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202837437U true CN202837437U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220490980 Expired - Fee Related CN202837437U (en) | 2012-09-24 | 2012-09-24 | Test system for carrying out diagnostic test on power unit |
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|---|---|
| CN (1) | CN202837437U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884941A (en) * | 2014-03-28 | 2014-06-25 | 深圳市英威腾电气股份有限公司 | High-voltage inverter, power unit and method and system for testing power unit |
| CN106597142A (en) * | 2016-11-08 | 2017-04-26 | 许继电气股份有限公司 | Automatic testing apparatus of SVG power module |
| CN107238504A (en) * | 2016-03-28 | 2017-10-10 | 上海华宇电子工程有限公司 | Simulation load box |
-
2012
- 2012-09-24 CN CN 201220490980 patent/CN202837437U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884941A (en) * | 2014-03-28 | 2014-06-25 | 深圳市英威腾电气股份有限公司 | High-voltage inverter, power unit and method and system for testing power unit |
| CN107238504A (en) * | 2016-03-28 | 2017-10-10 | 上海华宇电子工程有限公司 | Simulation load box |
| CN106597142A (en) * | 2016-11-08 | 2017-04-26 | 许继电气股份有限公司 | Automatic testing apparatus of SVG power module |
| CN106597142B (en) * | 2016-11-08 | 2019-11-22 | 许继电气股份有限公司 | A kind of automatic testing equipment of SVG power module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20180924 |
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| CF01 | Termination of patent right due to non-payment of annual fee |