CN108267659A - A kind of frequency converter test platform and frequency converter test method - Google Patents
A kind of frequency converter test platform and frequency converter test method Download PDFInfo
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- CN108267659A CN108267659A CN201810195396.8A CN201810195396A CN108267659A CN 108267659 A CN108267659 A CN 108267659A CN 201810195396 A CN201810195396 A CN 201810195396A CN 108267659 A CN108267659 A CN 108267659A
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Abstract
The present embodiments relate to frequency converter testing fields, disclose a kind of frequency converter test platform and frequency converter test method.The frequency converter test platform includes：Host computer, power grid, interface board circuit and test circuit；Interface board circuit connects respectively with host computer and test circuit communication；Interface board circuit includes first input port and the first output port, and test circuit includes tested frequency converter, multiple test cases are provided in host computer；Power grid is used to provide power supply for test circuit；Wherein, host computer obtains test case to be tested, during testing results use-case, analog parameter is input to tested frequency converter by the first input port of interface board circuit, is run by tested frequency converter according to analog parameter；After tested frequency converter operation operation result is given to the host computer by the first output port of interface board circuit.In the present invention so that the test process of frequency converter is simple, easy to operate, and can simulate operating mode and carry out error protection class testing.
Description
Technical field
The present embodiments relate to frequency converter testing field, more particularly to a kind of frequency converter test platform and frequency converter test
Method.
Background technology
Frequency converter has been widely used in various industrial automation necks as a kind of electric energy control device of voltage regulation and frequency modulation
Domain.Detection before dispatching from the factory is required for special frequency converter, ensures that its is up-to-standard, thus needs the function to frequency converter
Carry out a series of test.
Inventor has found that at least there are the following problems in the prior art：The existing Function detection to frequency converter is usually logical
Remarkable working medium inspection, and the test platform is complicated for operation.Frequency converter function is complicated, and test event is various, and artificial detection not only causes
Heavy workload, labor intensity is high, and detection leakage phenomenon easily occurs, in addition, since the data after manual testing are required for filling in manually,
Management is extremely inconvenient.Although the system of existing automatic test frequency converter can test the frequency converter of part, there are still
Following problem：1) to the more demanding of tester, the design requirement of current embedded automatization test system platform is all
Tester is configured according to all kinds of software and hardwares and environment, ensures that stablizing for test system is transported by entering data to thereto
Row, and the result of output is analyzed.Software test some also needs to write test script, and this requires tester has
Certain knowledge on testing and professional ability need to be familiar with the application environment of frequency converter and be respectively configured also to be familiar with opening for test platform
Language is sent out, there is certain Software Coding ability.2) existing test platform is the performance of test frequency converter and most basic function,
Test event is limited.Existing frequency converter test platform is mostly used PLC (programmable logic controller (PLC), Programmable Logic
Controller it) controls, operating mode cannot be simulated when the error protection class function to frequency converter is tested, and event cannot be carried out
The functional test of barrier protection class.3) device used in existing test system is complicated, and cost of testing system is higher.
Invention content
Embodiment of the present invention is designed to provide a kind of frequency converter test platform and frequency converter test method so that becomes
The test process of frequency device is simple, easy to operate, and can simulate operating mode and carry out error protection class testing.
In order to solve the above technical problems, embodiments of the present invention provide a kind of frequency converter test platform, including：It is upper
Mechanical, electrical net, interface board circuit and test circuit；Interface board circuit respectively with host computer and test circuit communication connect, power grid with
Test circuit is electrically connected；
Interface board circuit includes first input port and the first output port, and test circuit includes tested frequency converter, upper
Multiple test cases are provided in machine；Power grid is used to provide power supply for test circuit, the first input port of interface board circuit and
The control signal mouth connection of tested frequency converter, the first output port of interface board circuit and the control output end of tested frequency converter
Mouth connection；
Wherein, host computer obtains test case to be tested, during testing results use-case, by analog parameter by connecing
The first input port of oralia circuit is input to tested frequency converter, is run by tested frequency converter according to analog parameter；Tested frequency conversion
Operation result is returned to by host computer by the first output port of interface board circuit after device operation.
Embodiments of the present invention additionally provide a kind of frequency converter test method, flat applied to above-mentioned frequency converter test
Platform includes the following steps：
Host computer determines test case according to test inventory to be tested；
Control command in test case is sent to interface board circuit by host computer；
The corresponding analog parameter of control command is output to test circuit by interface board circuit；
Host computer obtains the output data of test circuit by interface board and generates test report.
In terms of existing technologies, in test, host computer determines test case to embodiment of the present invention, does not need to survey
Examination personnel write test case on the spot so that and the frequency converter test platform can realize automatic detection, reduce human interference factor,
And then improve the reliability and operational efficiency of test platform.By setting interface board circuit test circuit that can receive mould
Intend signal, the analog signal is convenient that error protection class function is tested for simulating operating mode, since interface board circuit can
It realizes that frequency converter and host computer are communicated, and then realizes and frequency converter function is tested, reduce matching electric elements, drop
The low cost of test platform, simplifies the electrical connection of test platform.
In addition, interface board circuit further includes the second input port, second output terminal mouth, input power control port and output
Power control terminal mouth；Second input port is connect with the state output terminal mouth of tested frequency converter, and second output terminal mouth becomes with tested
The state output port connection of frequency device, input power control port are used to control the input power of tested frequency converter, out-put supply
Control port is used to control the out-put supply of tested frequency converter.In the embodiment, when the function to frequency converter is tested,
The state control information of frequency converter can be received by the second input port, so that the operating status to frequency converter controls,
Ensure that frequency converter is run in corresponding state.
In addition, test circuit further includes to dragging motor and to dragging frequency converter；To the first end for dragging motor and tested frequency converter
Out-put supply connection, the second end for dragging motor is connect with to the first end for dragging frequency converter, to drag frequency converter second end and
Power grid connects, and host computer to frequency converter is dragged to establish communication with connecting；Wherein, host computer is by communicating connection control to dragging frequency converter
Operating status and/or to being written and read to the parameter information for dragging frequency converter.
In addition, test circuit further includes input current sensor and output current sensor, interface board circuit further includes defeated
Enter electric current and obtain port and output current acquisition port；Input current sensor is serially connected between tested frequency converter and power grid, defeated
Enter the control terminal of current sensor and input current obtains port and is electrically connected；Output current sensor be serially connected in tested frequency converter and
Between dragging motor, control terminal and the output current of output current sensor obtain port and are electrically connected.In the embodiment, pass through
Current sensor, which can be realized, is detected the current value that outputs and inputs of frequency converter, improves the accuracy of test data.
In addition, host computer is connected by serial communication bus and interface board circuit communication；Interface board circuit is by serially leading to
The operation result of collected tested frequency converter is sent to host computer by news bus；And/or interface board circuit passes through serial communication
The port connection state of the tested frequency converter of test is sent to host computer by bus.
It is connect in addition, host computer carries out communication by communications protocol with tested frequency converter, host computer is obtained by communicating connection
Take the operating status of tested frequency converter and/or the parameter value of the operation of the tested frequency converter of control and/or the tested frequency converter of modification；Its
In, communications protocol includes：MODBUS communications protocol, TCP/IP transmission control/internet communication protocols.
In addition, host computer further includes emergency stop switch；It is cut in time when emergency stop switch is abnormal for frequency converter test platform
Power-off source.In the embodiment, can in time it be cut off the power by emergency stop switch when urgent or unusual condition occurs, guarantor
Body safety.
In addition, a test inventory includes at least a test case, wherein, test case is compiled by host computer
It writes.
It is specifically included in addition, host computer obtains the output data of test circuit and generate test report by interface board：
Host computer obtains the output data of test circuit after each test case performs；
Host computer determines that the test case in test inventory is performed both by finishing；
Host computer generates test report according to the corresponding output data of each test case；
Wherein, test report is stored in the database of host computer, and test report includes at least：It tests inventory title, survey
One in examination person, testing time, tested frequency converter model, test case, test result.
Description of the drawings
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not formed to embodiment, the element for having same reference numbers label in attached drawing are expressed as similar element, remove
Non- have a special statement, and composition does not limit the figure in attached drawing.
Fig. 1 is the structure diagram of frequency converter test platform in first embodiment of the invention；
Fig. 2 is another structure diagram of frequency converter test platform in first embodiment of the invention；
Fig. 3 is the structure diagram of frequency converter test platform in second embodiment of the invention；
Fig. 4 is frequency converter test method flow chart in third embodiment of the invention；
Fig. 5 is frequency converter test method flow chart in four embodiment of the invention；
Fig. 6 is another flow chart of frequency converter test method in four embodiment of the invention；
Fig. 7 is the implementation procedure figure of DC injection braking function in four embodiment of the invention.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with attached drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, it can also realize the application technical solution claimed.
The first embodiment of the present invention is related to a kind of frequency converter test platforms.Its structure is as shown in Figure 1.Including：It is upper
Machine 10, power grid 20, interface board circuit 30 and test circuit 40；Interface board circuit 30 is logical with host computer 10 and test circuit 40 respectively
News connection, power grid 20 are electrically connected with test circuit 40.
Interface board circuit 30 includes first input port D1 and the first output port D2, and test circuit 40 includes tested frequency conversion
Device 41 is provided with multiple test cases in host computer 10；Power grid 20 is used to provide power supply, interface board circuit 30 for test circuit 40
First input port D1 connect with the control signal mouth of tested frequency converter 41, the first output port D2 of interface board circuit 30
It is connect with the control output end mouthful of tested frequency converter 41；Wherein, host computer 10 obtains test case to be tested, and testing results are used
During example, analog parameter is input to tested frequency converter 41 by the first input port D1 of interface board circuit 30, by quilt
Frequency converter 41 is surveyed to run according to analog parameter；Tested frequency converter 41 will by the first output port of interface board circuit 30 after running
Operation result returns to host computer 10.
It should be noted that since first input port D1 is used to the analog parameter in test case being sent to tested change
Frequency device 41 so that tested frequency converter 41 can carry out error protection class functional test, avoid tested frequency converter 41 and only counting
The problem of cannot carrying out error protection class testing under the control of word amount input signal.
Specifically, interface board circuit 30 further includes the second input port A1, second output terminal mouth A2, input power control terminal
Mouth S1 and out-put supply control port S2；Second input port A1 is connect with the state output terminal mouth of tested frequency converter 41, and second
Output port A2 is connect with the state output port of tested frequency converter 41, and input power control port S1 is used to control tested frequency conversion
The input power of device 41, out-put supply control port S2 are used to control the out-put supply of tested frequency converter 41.
In a concrete implementation, the voltage of the tested frequency converter 41 of access is can control by input power control port S1
The number of phases, as being both provided with contactor, the conducting of input power control port S1 control contactors in the input voltage circuit per phase
Or disconnect, by contactor control the phase whether input voltage.For example, in open-phase protection test, any contactor is set to break
It opens, detects the default-phase protection function of the tested frequency converter 41.
It should be noted that above-mentioned first input port D1, the first output port D2, the second input port A1 and second are defeated
The port number of exit port A2 is all higher than 1.In a concrete implementation, which includes first input on 8 tunnels
Port D1, the first output port D2 on 3 tunnels, the second input port A1 on 6 tunnels, the second output terminal mouth A2 on 14 tunnels and some other
Communication interface.For example, tested frequency converter only has 3 first input ports and is connect with the first input port on interface board circuit,
Remaining first input port on interface board can be connect with other devices in test circuit.In another concrete implementation,
Second input port can be the digital quantity input port of multichannel, and host computer 10 exports digital quantity signal control by interface board circuit
The operating status of the tested frequency converter of system.For example, after circuit connection is completed, Multipath digital quantity port input high level is namely opened
Test circuit is opened, determines that each port has correctly connected.
Interface board circuit 30 is the primary communications device that PC control is tested frequency converter, wherein, have in interface board circuit
Multiple communication interfaces lead to for host computer and tested frequency converter to be facilitated to be communicated for example, being provided with RS232 on interface board circuit
Communication interface, RS485 communication interfaces, controller local area network (Controller Area Network, CAN) communication interface,
Profibus-DP (Profibus-Decentralized Periphery, distributed peripheral equipment) communication interface.
Specifically, host computer 10 is connected by serial communication bus and the communication of interface board circuit 40, interface board circuit 40 is logical
It crosses serial communication bus and the operation result of collected tested frequency converter 41 is sent to host computer.For example, host computer and interface
Serial communication bus between plate circuit is RS232 communication interfaces and the communication interface established by MODBUS communications protocol, side
Just the information of the tested frequency converter of acquisition is sent to host computer by interface board circuit.
It is connect specifically, host computer 10 carries out communication by communications protocol with tested frequency converter 41, host computer 10 passes through logical
News connection obtains the operating status of tested frequency converter 41 and/or the operation of the tested frequency converter of control.Wherein, communications protocol includes：
MODBUS communications protocol, TCP/IP (Transmission Control Protocol/Internet Protocol, transmission control
Agreement/Internet Protocol processed) communications protocol.
In a concrete implementation, host computer 10 can get the fortune of tested frequency converter 41 by interface board circuit 30
Row is as a result, can also pass through the direct operating status that tested frequency converter is obtained with the communication connection of tested frequency converter 41.As shown in Fig. 2,
Host computer 10 is connect with tested frequency converter 41 by serial communication bus, and interface board circuit 30 is also to pass through with tested frequency converter 41
Serial communication bus connects, and host computer 10 can directly acquire the operating status of tested frequency converter.
Specifically, being provided with various communication interfaces on interface board circuit 30, the test device of nonstandard protocol is selected
Communication connection is realized using the mode of plug-in card configuration.
Specifically, after frequency converter test platform electrical connection is completed, interface board circuit 30 also is able to sweep into line interface
It retouches, the port for determining to connect with tested frequency converter and host computer can carry out signal transmission, and output circuit connection is correctly reported
It accuses.That is after by frequency converter access circuit to be tested, determine that circuit connection is correct, then after first powering on,
Interface board circuit can first determine the connection of each port, and export a test report, the connection status of display circuit.
It should be noted that tested frequency converter 41 is connected to after circuit, each interface of interface board circuit all correctly connects
Connect, host computer can obtain all parameter informations of tested frequency converter, e.g., be tested the power supply mode of frequency converter, load current value,
The parameter informations such as power factor.The frequency converter test platform can support the frequency converter of 200V grades and 400V grades, support unidirectional
220V is inputted and three-phase 380V inputs.
Specifically, interface board circuit 30 is additionally provided with programmable chip, such as STM32 microcontrollers, in programmable chip
Program is inside provided with, the communication state and interface conversion of control interface plate circuit facilitate the frequency converter test platform to be upgraded.
In terms of existing technologies, in test, host computer determines test case, does not need to tester and writes on the spot
Test case so that the frequency converter test platform can realize automatic detection, reduce human interference factor, and then it is flat to improve test
The reliability and operational efficiency of platform.By setting interface board circuit test circuit that can receive analog signal, the simulation
Signal is convenient that error protection class function is tested for simulating operating mode, due to interface board circuit can realize frequency converter and
Host computer is communicated, and then realizes and frequency converter function is tested, and is reduced matching electric elements, is reduced test platform
Cost simplifies the electrical connection of test platform.
Second embodiment of the present invention is related to a kind of frequency converter test platform.Second embodiment and first embodiment
It is roughly the same, it is in place of the main distinction：In second embodiment of the invention, the structure of test circuit is illustrated.Such as Fig. 3 institutes
Show, test circuit is further included to dragging motor 42 and to dragging frequency converter 43 in the frequency converter test platform.
The first end for dragging motor 42 is connect with the out-put supply of tested frequency converter 41, to drag the second end of motor 42 with it is right
The first end of frequency converter 43 is dragged to connect, the second end for dragging frequency converter 43 is connect with power grid 20, it is illustrated that in do not mark.Host computer 10
With being connected to frequency converter 43 is dragged to establish communication；Wherein, host computer 10 is by communicating the operation shape for connecting and controlling to dragging frequency converter 43
State and/or to being written and read to the parameter information for dragging frequency converter 43.
It should be noted that it is synchronous motor or asynchronous machine to dragging motor 42 so that the frequency converter test platform can
Support tested Frequency Converter Control synchronous motor and asynchronous machine.In Fig. 3, tested frequency converter 41 runs and controls to dragging motor 42
Operation carries out load testing to dragging 42 reverse direction operation of motor to frequency converter 43 is dragged to control to be tested frequency converter.
Specifically, being really two motors to dragging motor 42, the main shaft of two motors is connected with shaft coupling, two motors point
Not by tested frequency converter 41 and to frequency converter 43 is dragged to control.It should be noted that dragging frequency converter 43 generally using direct torque
Pattern, to dragging the motor that frequency converter connects opposite with the motor rotation direction that tested frequency converter connects.
Specifically, test circuit 40 further includes input current sensor 44 and output current sensor 45, interface board circuit
30, which further include input current, obtains port L1 and output current acquisition port L2；Input current sensor 44 is serially connected in tested frequency conversion
Between device 41 and power grid 20, control terminal and the input current of input current sensor 44 obtain port L1 and are electrically connected；Output current
Sensor 45 be serially connected in tested frequency converter and to dragging motor between, the control terminal of output current sensor 45 is obtained with output current
Port L2 is electrically connected.
It should be noted that output current sensor all the way is corresponded to per input current sensor all the way, if this is tested
Frequency converter is unidirectional 220V control sources, then input current sensor is concatenated between power grid and tested frequency converter, is tested and becomes
Frequency device concatenates output current sensor between motor with to dragging.For another example, the 380V control sources that frequency converter is three-phase are tested, then only
Current sensor need to be accessed between the input terminal of two-phase, due to the fixed value of carrier phase shift between three-phase current,
The current value of another phase can be calculated according to biphase current value.Three-phase input end is respectively U phases, V phases and W phases, if in U phases and
Input current sensor is concatenated between V phases, then three-phase output end also concatenates output current sensor between U phases and V phases respectively.
Herein by way of example only, specifically the position of concatenation input current sensor can be according to practical sets itself.
In a concrete implementation, input current sensor and output current sensor are Hall current sensor,
Hall current sensor can be threaded through between tested frequency converter and the cable of power grid according to the structure of Hall current sensor or
Person is threaded through between tested frequency converter and cable to dragging motor so that Hall current sensor can be cut according to where flowing through its
The electric current and changes of magnetic field in face determine the value of electric current on circuit.The response time fast measurement accuracy of Hall current sensor is higher,
Host computer can be made to recognize the current value of tested frequency converter in time, do not limit the type of current sensor in present embodiment,
It is merely illustrative of herein.
In terms of existing technologies, circuit-under-test can coordinate tested frequency converter to carry out the test of various functions, meet
Tested frequency converter makes test result more reliable the various requirement of load.
Third embodiment of the invention is related to a kind of frequency converter test method, applied to above-mentioned first or second embodiment
Described in frequency converter test platform, idiographic flow is as shown in figure 4, include the following steps：
Step 401：Host computer determines test case according to test inventory to be tested.
Specifically, host computer obtains test inventory, and corresponding test case is determined according to test inventory, need what is illustrated
It is that test case is write with host computer.One test inventory includes multiple test cases, when there is multiple test cases
When, host computer can perform sequence according to what the sequence of addition test case determine multiple test cases.It is formed in test inventory
Afterwards, tester can start then to have changed again after execution to the content of inventory into edlin and modification, but in test.
It should be noted that host computer includes input unit and display unit, test case is carried out by developing tester
It writes and is stored in host computer, when tester tests tested frequency converter, it is only necessary to by function number to be tested
Enter host computer, host computer can show execution state in implementation of test cases on the display unit, and host computer is according to acquisition
The test function arrived forms test inventory.In addition, being stored with the test case template of part in host computer, tester can be direct
Write test case using test case template so that write test case and carry out tested frequency converter test can separate into
Row.Host computer if it is determined that there is no test case that can then send out prompting in a certain test inventory, tester receive the prompting it
Afterwards, it may be selected to remove this test or a test case write by host computer.
Specifically, before this step, tester needs to obtain the parameters information of tested frequency converter, and joining this into
Number information input host computer, host computer are modified or are adjusted to the parameter in test case according to the parameter information of tested frequency converter
It is whole.
In a concrete implementation, when having multiple inventories to be tested, host computer is selected according to the priority of testing sequence
The inventory to be tested first tested, is tested one by one.Alternatively, when needing to test multiple functions, being tested at one can on inventory
Multiple test functions are added, each test function corresponds to respective test case, it is possible to it is more that completion on inventory is tested at one
The test of a function.
Step 402：Control command in test case is sent to interface board circuit by host computer.
Specifically, host computer is implementation of test cases one by one, host computer is by the control in currently performed test case
Order is sent to interface board circuit, the control determining test case execution completion and then by next test case
Order is sent to interface board circuit.
Step 403：The corresponding analog parameter of control command is output to test circuit by interface board circuit.
Specifically, test case includes controlling the state for being tested frequency converter.For example, in output open-phase protection test
In, the voltage that S2-U phases are set in test case is 0, and the control command in test case is sent to interface board circuit by host computer
In, the S2-U phase power control terminal mouths in interface board circuit then export cut-off signal so that S2-U phase contacts disconnect, and carry out defeated
Go out open-phase protection test.
Step 404：Host computer obtains the output data of test circuit by interface board circuit and generates test report.
Specifically, in each test case implementation procedure, host computer obtains the output data of test circuit in real time, and will
Output result is shown on test inventory, after the completion of all testing cases in an inventory, automatically according to the output number
According to generation test report.
One based on above-mentioned frequency converter test method in the specific implementation, by taking tested frequency converter module overcurrent protection as an example,
It should be noted that test case of the host computer according to test function selecting module overcurrent protection, is carried out using the test case
The basic process of test：For IGBT in tested frequency converter, (Insulated Gate Bipolar Transistor, insulated gate are double
Bipolar transistor) module hardware overcurrent protection, when the rated current of tested frequency converter is more than instantaneous protection value, it is connected to brake pipe
The circuit of foot will provide a brake signal, which is blocked PWM (Pulse Width Modulation, pulse width tune
System) pulse, frequency converter test platform output fault message, directly shutdown.Current value, busbar electricity when the test circuit is by failure
Pressure value, given frequency and feedback frequency etc. feed back to host computer.The specific test process of the function is：The frequency converter test platform
After electrifying startup, host computer obtains the parameter acquiring function to be tested of tested frequency converter, this is tested by generation test inventory
In the parameter configuration to test case of frequency converter, the control command in the test case is input to by interface board circuit tested
Circuit, circuit-under-test record the fluctuation range of output current, stop load motor when quoting failure immediately, terminate test.Test
Host computer provides the halt command and reset command to dragging frequency converter after end.
It should be noted that interface board circuit is needed to export analog parameter in above-mentioned test, pass through the analog parameter control
Make a certain phase current values more than frequency converter protect threshold values, and then ensure the frequency converter in overcurrent protection can power themselves down, example
Such as, in start recording current value fluctuating change, it is overcurrent protection failure that failure is quoted in 5s seconds and is confirmed, then is successfully tested；
If start recording current fluctuation does not all quote failure, test crash after changing 10s seconds.
In terms of existing technologies, test case is directly stored in host computer, tester is avoided to carry out every time
Also test case is write according to port numbers during test, simplify test process, improve testing efficiency.
It is not difficult to find that present embodiment be with the corresponding embodiment of the method for first embodiment, present embodiment can be with
First embodiment is worked in coordination implementation.The relevant technical details mentioned in first embodiment still have in the present embodiment
Effect, in order to reduce repetition, which is not described herein again.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in
In first embodiment.
Four embodiment of the invention is related to a kind of frequency converter test method.4th embodiment and third embodiment are big
It causes identical, is in place of the main distinction：In four embodiment of the invention, specifically illustrate in above-mentioned third embodiment
The specific implementation procedure of step 404, implementing procedure are as shown in Figure 5.Including step is implemented as follows：
Step 501：Host computer determines test case according to test inventory to be tested.
Step 502：Control command in test case is sent to interface board circuit by host computer.
Step 503：The corresponding analog parameter of control command is output to test circuit by interface board circuit.
It should be noted that step 501 is identical to step 403 with step 401 in third embodiment to step 503, this
Place repeats no more.
Step 504：Host computer obtains the output data of test circuit after each test case performs.
Specifically, host computer obtains the output data of the test circuit after each test case performs, according to the output
Data determine whether each test case runs succeeded, and determine the executive condition of this test function.
Step 505：Host computer determines that the test case in test inventory is performed both by finishing.
Specifically, when starting to perform test, host computer can first determine that the number of the test case in test inventory, often
One test case performs complete after, subtract one to the number of test case, until all test cases are performed both by finishing,
When being exactly that the number of test case becomes 0, determine that test inventory executed finishes.
Step 506：Host computer generates test report according to the corresponding output data of each test case.
Specifically, test report is stored in the database of host computer, which includes at least：Test inventory name
One in title, test man, testing time, tested frequency converter model, test case, test result.
Complete that record later performs as a result, further including every it should be noted that host computer is performed in each test case
Whether a test case runs succeeded, number of the successful number of test case and test case failure etc..In addition, host computer exists
After each test case performs completion, the configuration parameter of system can be also obtained, is tested busbar voltage, the three-phase current of frequency converter
Value, the running frequency of tested frequency converter and running frequency to dragging frequency converter etc..
In a specific description, using the work flow diagram of the frequency converter test platform as shown in fig. 6, from starting to survey
It tries to test to terminate, include the following steps：
Step 601：Host computer obtains tester's information and test inventory；
Step 602：Host computer determines test case according to test inventory to be tested；
Step 603：Judge whether to proceed by test；If it has, then perform step 604；Otherwise, step is continued to execute
603, that is, continue to send out inquiry.
Step 604：Judge whether interface board circuit communication connection is normal；If it has not, perform step after then performing step 605
Rapid 603；If it has, then perform step 606；
Step 605：Host computer sends out prompting and checks interface board circuit communication connection；
Step 606：Judge to dragging frequency converter communication connection whether normal；If it has not, perform step after then performing step 607
Rapid 603；If it has, then perform step 608；
Step 607：Host computer sends out prompting and checks to frequency converter is dragged to communicate to connect；
Step 608：Judge whether tested frequency converter communication connection is normal；If it has not, perform step after then performing step 609
Rapid 603；If it has, then perform step 610；
Step 609：Host computer sends out prompting and checks tested frequency converter communication connection；
Step 610：Start to perform test inventory；
Step 611：Judge whether pending test case number is more than 0；If it has, then step 612 is performed, otherwise,
Perform step 617；
Step 612：Perform test command；
Step 613：Judge whether operation result meets setting condition；If it has, then perform step 614；Otherwise, step is performed
Rapid 615；
Step 614：Record the success of this item test case；
Step 615：Record the failure of this item test case；
Step 616：Test case number subtracts one；It needs to perform step 611 after this step, until determining test case number
It is 0, performs step 617；
Step 617：Output test listing result simultaneously generates test report.
In a concrete implementation, for starting the test of DC injection braking function, which is：Xiang Jiang
DC current is input in test circuit, with to motor is dragged to carry out continuous current excitation and direct current band-type brake, the time of direct current injection and
The size of direct current input is tested frequency converter as shown in fig. 7, the direct current time reaches and then run from startup keep frequency, passes through
After starting the retention time, tested frequency converter is made to accelerate to setpoint frequency.Then need to be written in test case：Start and keep frequency
Rate starts the retention time, starts direct current input current value and starts direct current input time.It is mainly wrapped in the test of the function
It includes：Confirm parameter read-in test case, specially start keep frequency, start the retention time, start direct current input current value and
Start direct current input time；Electrifying startup test circuit, the electric current that host computer obtains tested frequency converter by interface board circuit are defeated
Go out value, DC injection braking time and completion DC injection braking time；Shut down tested frequency converter.
The step of various methods divide above, be intended merely to describe it is clear, when realization can be merged into a step or
Certain steps are split, are decomposed into multiple steps, as long as including identical logical relation, all in the protection domain of this patent
It is interior；To inessential modification is either added in algorithm in flow or introduces inessential design, but do not change its algorithm
Core design with flow is all in the protection domain of the patent.
It will be appreciated by those skilled in the art that all or part of the steps of the method in the foregoing embodiments are can to pass through
Program is completed to instruct relevant hardware, which is stored in a storage medium, is used including some instructions so that one
A equipment (can be microcontroller, chip etc.) or processor (processor) perform each embodiment the method for the application
All or part of step.And aforementioned storage medium includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of frequency converter test platform, which is characterized in that including：Host computer, power grid, interface board circuit and test circuit；Institute
It states interface board circuit to connect with the host computer and test circuit communication respectively, the power grid is electrically connected with the test circuit
It connects；
The interface board circuit includes first input port and the first output port, and the test circuit includes tested frequency converter,
Multiple test cases are provided in the host computer；The power grid is used to provide power supply, the interface board for the test circuit
The first input port of circuit is connect with the control signal mouth of the tested frequency converter, the interface board circuit it is described
First output port is connect with the control output end mouthful of the tested frequency converter；
Wherein, the host computer obtains the test case to be tested, and during running the test case, simulation is joined
Number is input to the tested frequency converter by the first input port of the interface board circuit, is pressed by the tested frequency converter
It is run according to the analog parameter；It will by first output port of the interface board circuit after the tested frequency converter operation
Operation result returns to the host computer.
2. frequency converter test platform according to claim 1, which is characterized in that it is defeated that the interface board circuit further includes second
Inbound port, second output terminal mouth, input power control port and out-put supply control port；
Second input port is connect with the state output terminal mouth of the tested frequency converter, the second output terminal mouth with it is described
The state output port connection of tested frequency converter, the input power control port are used to control the input of the tested frequency converter
Power supply, the out-put supply control port are used to control the out-put supply of the tested frequency converter.
3. frequency converter test platform according to claim 1, which is characterized in that the test circuit is further included to dragging motor
With to dragging frequency converter；
Described pair is dragged the first end of motor to be connect with the out-put supply of the tested frequency converter, the described pair of second end for dragging motor with
Described pair is dragged the first end of frequency converter to connect, and described pair is dragged the second end of frequency converter to be connect with the power grid, the host computer with
Described pair is dragged frequency converter to establish communication connection；
Wherein, the host computer drags the operating status of frequency converter and/or to described right by described pair of the communication connection control
The parameter information of frequency converter is dragged to be written and read.
4. frequency converter test platform according to claim 3, which is characterized in that the test circuit further includes input current
Sensor and output current sensor, the interface board circuit further include input current and obtain port and output current acquisition end
Mouthful；
The input current sensor is serially connected between the tested frequency converter and the power grid, the input current sensor
Control terminal obtains port with the input current and is electrically connected；The output current sensor is serially connected in the tested frequency converter and institute
Between stating to dragging motor, control terminal and the output current of the output current sensor obtain port and are electrically connected.
5. frequency converter test platform according to claim 1, which is characterized in that the host computer passes through serial communication bus
It communicates and connects with the interface board circuit；
The interface board circuit is sent the operation result of the collected tested frequency converter by the serial communication bus
To the host computer；And/or
The interface board circuit is sent out the port connection state of the tested frequency converter of test by the serial communication bus
It is sent to the host computer.
6. frequency converter test platform according to claim 1, which is characterized in that the host computer passes through communications protocol and institute
It states tested frequency converter and carries out communication connection, the host computer obtains the operation shape of the tested frequency converter by the communication connection
The operation of state and/or the control tested frequency converter and/or the parameter value of the modification tested frequency converter；
Wherein, the communications protocol includes：MODBUS communications protocol, TCP/IP transmission control/internet communication protocols.
7. frequency converter test platform according to claim 1, which is characterized in that the host computer further includes emergency stop switch；
The emergency stop switch is cut off the power in time when being abnormal for the frequency converter test platform.
8. a kind of frequency converter test method, which is characterized in that surveyed applied to frequency converter as described in any one of claim 1 to 7
Platform is tried, the frequency converter test method includes：
Host computer determines test case according to test inventory to be tested；
Control command in the test case is sent to interface board circuit by the host computer；
The corresponding analog parameter of the control command is output to test circuit by the interface board circuit；
The host computer obtains the output data of the test circuit by the interface board and generates test report.
9. frequency converter test method according to claim 8, which is characterized in that a test inventory includes at least one
A test case, wherein, the test case is write by the host computer.
10. frequency converter test method according to claim 8 or claim 9, which is characterized in that the host computer passes through the interface
Plate obtains the output data of the test circuit and generates test report and specifically includes：
The host computer obtains the output data of the test circuit after each test case performs；
The host computer determines that the test case in the test inventory is performed both by finishing；
The host computer generates the test report according to each corresponding output data of test case；
Wherein, the test report is stored in the database of the host computer, and the test report includes at least：Test inventory
One in title, test man, testing time, tested frequency converter model, test case, test result.
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| CN201810195396.8A CN108267659A (en) | 2018-03-09 | 2018-03-09 | A kind of frequency converter test platform and frequency converter test method |
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| CN201810195396.8A CN108267659A (en) | 2018-03-09 | 2018-03-09 | A kind of frequency converter test platform and frequency converter test method |
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| CN109490675A (en) * | 2018-12-27 | 2019-03-19 | 上海辛格林纳新时达电机有限公司 | Method for early warning, electronic equipment and test macro |
| CN111175601A (en) * | 2020-01-03 | 2020-05-19 | 云南电网有限责任公司电力科学研究院 | Modular functional test system |
| CN111337765A (en) * | 2020-02-19 | 2020-06-26 | 上海辛格林纳新时达电机有限公司 | Frequency converter parameter testing system and testing method |
| CN111722620A (en) * | 2020-07-16 | 2020-09-29 | 上海辛格林纳新时达电机有限公司 | Drive-control integrated board testing device and method |
| CN111766466A (en) * | 2020-06-28 | 2020-10-13 | 北京合康新能变频技术有限公司 | High-voltage inverter complete machine test tool system |
| CN112346429A (en) * | 2019-08-06 | 2021-02-09 | 天津光电通信技术有限公司 | Testing method and device of variable frequency control equipment and storage medium |
| CN113970675A (en) * | 2021-09-29 | 2022-01-25 | 深圳市禾望电气股份有限公司 | Automatic test method and device for performance index of frequency converter |
| CN114217178A (en) * | 2021-11-04 | 2022-03-22 | 深圳市海浦蒙特科技有限公司 | Method and system for voltage withstand test of frequency converter and computer readable storage medium |
| CN115047371A (en) * | 2022-06-09 | 2022-09-13 | 济南航进电子科技有限公司 | Partial discharge-free variable frequency power supply operation detection system based on transformer detection |
| CN115389906A (en) * | 2022-08-17 | 2022-11-25 | 深圳十分到家服务科技有限公司 | Fault detection device and fault detection method |
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| CN113970675A (en) * | 2021-09-29 | 2022-01-25 | 深圳市禾望电气股份有限公司 | Automatic test method and device for performance index of frequency converter |
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| CN115047371A (en) * | 2022-06-09 | 2022-09-13 | 济南航进电子科技有限公司 | Partial discharge-free variable frequency power supply operation detection system based on transformer detection |
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