CN111337765A - Frequency converter parameter testing system and testing method - Google Patents
Frequency converter parameter testing system and testing method Download PDFInfo
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- CN111337765A CN111337765A CN202010101788.0A CN202010101788A CN111337765A CN 111337765 A CN111337765 A CN 111337765A CN 202010101788 A CN202010101788 A CN 202010101788A CN 111337765 A CN111337765 A CN 111337765A
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Abstract
The invention discloses a frequency converter parameter testing system and a testing method, wherein the system comprises an upper computer, and the upper computer comprises: the communication configuration module is used for configuring communication settings between the upper computer and the frequency converter; the parameter acquisition module is used for acquiring parameters and standard values of the frequency converter, generating a parameter list and storing the parameter list in the test selection module for later use; the test selection module is used for receiving a parameter selection instruction of a user to generate a parameter set to be tested; the test list module is used for generating a test parameter standard value list according to the parameters and the standard values thereof; and the test execution module is used for performing parameter test on the frequency converter according to the parameter set to be tested, comparing and judging whether the parameters are consistent or not, sending a comparison result to the test report generation module, and generating a test report. The testing system and the testing method are more ingenious and reasonable, and can quickly and accurately automatically detect and judge various parameters of the frequency converter, so that the testing efficiency of the frequency converter is greatly improved.
Description
Technical Field
The invention relates to a debugging technology of a frequency converter, in particular to the technical field of parameter testing of the frequency converter.
Background
With the continuous improvement of the industrial automation degree, the frequency converter is being widely applied, and the debugging technology of the frequency converter is required to be higher and finer. At present, the test of the frequency converter mainly realizes the test of a hardware interface and related performance of the frequency converter, and some automatic test systems can realize the test of specific functions of the frequency converter.
The frequency converter mainly comprises a rectifying unit, a filtering unit, an inverting unit, a braking unit, a driving unit, a detecting unit micro-processing unit and the like. The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off an internal IGBT, provides the required power supply voltage according to the actual requirement of the motor, and further achieves the purposes of energy saving and speed regulation.
The parameters of the frequency converter are indispensable important components of the frequency converter, and based on various units and functions of the frequency converter, the parameters of the current mainstream frequency converter are often as many as four or five hundred, however, in the prior art, each time a new program is issued to the frequency converter, the new program needs to be manually checked, including parameter codes, values of the parameters, parameter ranges, units of the parameters and the like, the workload of each time is huge, the time consumption is long, the efficiency is low, and due to artificial uncontrollable factors, the error rate is difficult to control, so that the production efficiency and the production quality are greatly influenced and limited.
The utility model discloses a "converter parameter setting system" (CN 20172720300903) has proposed a converter parameter setting system, and this system can realize once setting for a plurality of converter parameters, simplifies the parameter modification, reduces the error rate. The utility model discloses a need a parameter setting device and a programmable logic controller, programmable logic controller contains first communication unit, latches register, diagnostic unit, execution unit etc. and is with high costs. The utility model discloses a can only realize the function of a plurality of converter parameters of one-way write in of converter, the function singleness. The frequency converter has more parameters, the parameter attributes comprise Chinese and English notes, maximum values, minimum values, default values, decimal points, units, online modification, EEPROM storage and the like, and when the frequency converter parameters need to be tested manually, a large amount of manpower and time are consumed, the efficiency is low, and the error rate is high.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a more ingenious and reasonable frequency converter parameter testing system and a testing method, which can quickly and accurately automatically detect and judge various parameters of the frequency converter, thereby greatly improving the efficiency of frequency converter testing.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows:
a frequency converter parameter testing system comprises an upper computer which can be in communication connection with a frequency converter; the upper computer comprises a communication configuration module, a parameter acquisition module, a test selection module, a test list module, a test execution module and a test report generation module;
the communication configuration module is used for configuring communication settings between the upper computer and the frequency converter;
the parameter acquisition module is used for acquiring the parameters of the frequency converter and the standard values thereof, and is also used for generating a parameter list and storing the parameter list into the test selection module for later use;
the test selection module is used for receiving a parameter selection instruction of a user and generating a parameter set to be tested according to the parameter selection instruction;
the test list module is used for generating a test parameter standard value list according to the parameters of the frequency converter and the standard values thereof acquired by the parameter acquisition module;
the test execution module is used for performing parameter test on the frequency converter according to the parameter set to be tested generated by the test selection module, comparing test data with corresponding data of the test parameter standard value list, judging whether the test data are consistent with the corresponding data, obtaining a comparison result, and then sending the comparison result to the test report generation module;
the test report generation module generates a test report.
The frequency converter parameter testing system is ingenious and unique, solves the problem of frequency converter parameter testing with huge workload, realizes comprehensive and automatic frequency converter parameter testing, and is quick and high in accuracy; not only can a plurality of frequency converter parameters be modified, but also the correctness of all the parameters can be detected.
Further, the communication setting includes: the device comprises a frequency converter type, a protocol type, a device address, a communication mode, a port number, a baud rate, a verification mode and a data length.
Further, the parameter acquisition module specifically acquires the parameters of the frequency converter and the standard values thereof by importing in a file form.
Further, the test selection module is also used for providing an interactive interface for receiving user instructions.
Meanwhile, the invention provides a method for testing the parameters of the frequency converter, which is applied to the system for testing the parameters of the frequency converter and comprises the following steps:
a frequency converter parameter testing method is applied to the frequency converter parameter testing system, and comprises the following steps:
the communication configuration module configures communication settings between the upper computer and the frequency converter; finishing the communication connection between the upper computer and the frequency converter;
the parameter acquisition module acquires the parameters of the frequency converter and the standard values thereof, and generates a parameter list to be stored in the test selection module for later use;
the test selection module receives a parameter selection instruction of a user and generates a parameter set to be tested according to the parameter selection instruction;
the test list module generates a test parameter standard value list according to the parameters of the frequency converter and the standard values thereof acquired by the parameter acquisition module;
the test execution module performs parameter test on the frequency converter according to the parameter set to be tested generated by the test selection module, compares the obtained test data with corresponding data of the test parameter standard value list, judges whether the test data are consistent or not, obtains a comparison result, and then sends the comparison result to the test report generation module;
the test report generation module generates a test report.
Further, the communication setting includes: the device comprises a frequency converter type, a protocol type, a device address, a communication mode, a port number, a baud rate, a verification mode and a data length.
Further, the specific method for the test execution module to perform the parameter test on the frequency converter is as follows:
when the test parameter is a character string type variable, the test execution module reads the related character string type variable in the frequency converter, and then compares the related character string type variable with the corresponding parameter standard value in the test parameter standard value list to judge whether the related character string type variable is consistent with the corresponding parameter standard value in the test parameter standard value list;
when testing the default value, firstly resetting the relevant parameters of the frequency converter, then reading the numerical value of the parameters in the frequency converter, then comparing the numerical value with the corresponding parameter standard value in the test parameter standard value list, and judging whether the numerical value is consistent with the parameter standard value;
when testing the maximum value and the minimum value, firstly reading the maximum value or the minimum value of the parameter in a testing parameter standard value list, writing the standard value into the parameter of the frequency converter, if the writing is successful, adding a unit value or subtracting a unit value from the maximum value or the minimum value, writing the maximum value or the minimum value into the corresponding parameter, if the writing is successful, judging that the maximum value or the minimum value is inconsistent, and if the writing is unsuccessful, judging that the maximum value or the minimum value is consistent;
when the decimal point is tested, reading out related parameter values in the frequency converter, judging the decimal number, comparing the decimal number with the corresponding parameter standard value in the test parameter standard value list, wherein the decimal number is the same as the decimal number, and the decimal number is different if the decimal number is the same;
when the test of parameter reading, writing and online modification is carried out, and when the frequency converter does not run, parameter values are read, written and modified; sending an operation command, and respectively sending commands of reading, writing and modifying parameter values after the frequency converter operates; comparing the attribute data with attribute data in the test parameter standard value list, and judging whether the attribute data are consistent with the attribute data;
when the signed test is carried out, writing positive and negative numbers into corresponding parameters of the frequency converter to judge whether the number is signed or not by the success of the writing, comparing the number with data in the test parameter standard value list and judging whether the number is consistent or not;
when the reset test is carried out, after the parameters of the frequency converter are modified and successfully confirmed, a parameter reset command is sent, then the parameter values of the frequency converter are read, whether the parameter reset is finished or not is judged, and whether the parameter reset is consistent or not is judged by comparing the parameter reset command with the data in the test parameter standard value list;
when the EEPROM test is carried out, the parameters of the frequency converter are written and modified and are confirmed to be successful, and then a user is reminded to power off and restart the frequency converter; and the user selects 'power-off restart completion' after power-off restart, then the system sends an instruction for reading the parameter value of the frequency converter, compares the later read parameter value with the value written before power-off, compares the comparison data with the data in the test parameter standard value list, and judges whether the comparison data is consistent with the data in the test parameter standard value list.
Further, the parameter acquisition module specifically acquires the parameters of the frequency converter and the standard values thereof by importing in a file form.
Further, the test selection module is used for receiving a user instruction and providing an interactive interface, specifically displaying the selectable parameters on the interactive interface, checking by the user, and generating a parameter set to be tested according to the parameters checked by the user.
Further, the string-type variables are chinese notes, english notes, or units.
The frequency converter parameter testing method can efficiently finish the test of mass parameters of the frequency converter, the test contents comprise Chinese notes, English notes, parameter default values, minimum values, maximum values, decimal points, units, the readability and the writeability of the parameters, whether the parameters can be modified on line, whether the parameters are signed numbers, the parameter resetting condition and whether the parameters can be stored in the EEPROM for judgment, and the test result is output, thereby realizing the comprehensive and automatic test of the correctness of the parameters of the frequency converter. The method adopts a machine to replace manual automatic testing, and has the advantages of high testing speed, high efficiency and low error rate; and the operation is simple, and the cost is saved.
Drawings
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, wherein:
FIG. 1 is a schematic diagram of a frequency converter parameter testing system according to the present invention connected to a frequency converter.
FIG. 2 is a schematic structural diagram of a frequency converter parameter testing system according to the present invention.
Fig. 3 is a schematic flow chart of a method for testing parameters of a frequency converter according to the present invention.
In the figure:
100. upper computer 200 and frequency converter
1. Communication configuration module 2 and parameter acquisition module
3. Test selection module 4 and test list module
5. Test execution module 6 and test report generation module
Detailed Description
The invention is explained in more detail below with reference to the figures and examples:
fig. 1 and 2 show a transducer parameter testing system, which includes an upper computer 100 capable of being connected to a transducer 200 in communication; the upper computer 100 comprises a communication configuration module 1, a parameter acquisition module 2, a test selection module 3, a test list module 4, a test execution module 5 and a test report generation module 6.
The communication configuration module 1 is configured to configure communication settings between the upper computer 100 and the frequency converter 200. The communication setting includes: the frequency converter type, the protocol type, the equipment address, the communication mode, the port number, the baud rate, the verification mode, the data length and the like; the testing system can test frequency converters with various types and various communication modes, such as COM and TCP/IP modes; the frequency converter parameter testing system supports various communication protocols, is compatible with various frequency converter devices, is convenient to expand and is easy to iterate and upgrade.
The parameter obtaining module 2 is configured to obtain the parameters of the frequency converter 200 and the standard values thereof, and further configured to generate a parameter list and store the parameter list in the test selection module 3 for standby. The parameter obtaining module 2 obtains the parameters of the frequency converter 200 and the standard values thereof, which may be manually input by a user; or, the parameter obtaining module 2 may be a parameter importing module, and the parameters of the frequency converter 200 and the standard values thereof are imported and obtained in a file form.
The parameters described in the present invention include various variable values and also functional attribute values such as chinese notes, english notes, maximum values, minimum values, default values, decimal points, units, online modifications, EEPROM storage, and the like.
And the test selection module 3 is used for receiving a parameter selection instruction of a user and generating a parameter set to be tested according to the parameter selection instruction. The test selection module 3 also provides an interactive interface, specifically displays the selectable parameters on the interactive interface, is selected by the user, and generates a parameter set to be tested according to the parameters selected by the user. Of course, the parameter set to be measured can also be determined by the way of user self-input, preset parameter group and the like.
And the test list module 4 is configured to generate a test parameter standard value list according to the parameters of the frequency converter and the standard values thereof acquired by the parameter acquisition module.
The test execution module 5 is configured to perform parameter testing on the frequency converter 200 according to the parameter set to be tested generated by the test selection module, compare test data with corresponding data of the test parameter standard value list, determine whether the test data is consistent with the corresponding data, obtain a comparison result, and send the comparison result to the test report generation module 6.
The test report generation module 6 generates a test report.
The frequency converter parameter testing system solves the problem of frequency converter parameter testing with huge workload, realizes comprehensive and automatic frequency converter parameter testing, and is quick and high in accuracy; not only can a plurality of frequency converter parameters be modified, but also the correctness of all the parameters can be detected.
Fig. 3 shows a frequency converter parameter testing method, which is applied to the frequency converter parameter testing system, and the method includes:
102, acquiring the parameters and standard values of the frequency converter 200 by the parameter acquisition module 2, generating a parameter list and storing the parameter list into the test selection module 3 for later use;
the parameter obtaining module 2 obtains the parameters of the frequency converter 200 and the standard values thereof, and the parameters may be manually input by a user or may be called from a database. The parameter obtaining module 2 may be a parameter importing module, and the parameters of the frequency converter 200 and the standard values thereof may be imported and obtained in a file form.
The test selection module 3 also provides an interactive interface, specifically displays the selectable parameters on the interactive interface, is selected by the user, and generates a parameter set to be tested according to the parameters selected by the user. Of course, the parameter set to be measured can also be determined by the way of user self-input, preset parameter group and the like.
The test list module 4 generates a test parameter standard value list according to the parameters and the standard values of the frequency converter 200 acquired by the parameter acquisition module 2.
The specific method for the test execution module to perform the parameter test on the frequency converter 200 is as follows:
when the test parameter is a character string type variable, the test execution module 6 reads the related character string type variable in the frequency converter 200, and then compares the related character string type variable with the corresponding parameter standard value in the test parameter standard value list to judge whether the related character string type variable is consistent with the corresponding parameter standard value in the test parameter standard value list; the character string type variables are Chinese notes, English notes or units and the like.
When testing the default value, firstly resetting the relevant parameter of the frequency converter 200, then reading the value of the parameter in the frequency converter 200, then comparing the value with the corresponding parameter standard value in the test parameter standard value list, and judging whether the values are consistent;
when testing the maximum value and the minimum value, firstly reading the maximum value or the minimum value of the parameter in a testing parameter standard value list, writing the standard value into the parameter of the frequency converter, if the writing is successful, adding a unit value or subtracting a unit value from the maximum value or the minimum value, writing the maximum value or the minimum value into the corresponding parameter, if the writing is successful, judging that the maximum value or the minimum value is inconsistent, and if the writing is unsuccessful, judging that the maximum value or the minimum value is consistent;
for example, the parameter P52.00 to be tested (the number of motors, the maximum value is 10, and the minimum value is 1) is read out, the maximum value of the P52.00 in the standard value list of the test parameters is 10, then 10 is written into the P52.00 parameter of the frequency converter 200, if the writing is successful, then 11 is tried to be written into the P52.00 parameter of the frequency converter 200 (if 1 is the unit increment of the P52.00 parameter), if the writing is successful, the maximum values are determined to be inconsistent, and if the writing is unsuccessful, the maximum values are determined to be consistent;
when the decimal point is tested, the related parameter values in the frequency converter 200 are read out, the decimal number is judged and compared with the corresponding parameter standard value in the test parameter standard value list, the decimal number is the same as the decimal number, and the decimal number is inconsistent if the decimal number is the same as the decimal number;
when the test of parameter reading, writing and online modification is carried out, the parameter values are read, written and modified when the frequency converter 200 does not run; sending an operation command, and respectively sending commands of reading, writing and modifying parameter values after the frequency converter 200 operates; comparing the attribute data with attribute data in the test parameter standard value list, and judging whether the attribute data are consistent with the attribute data;
when the signed test is carried out, writing the positive and negative numbers into the corresponding parameters of the frequency converter 200 to judge whether the signed numbers are written successfully or not, comparing the signed numbers with the data in the test parameter standard value list and judging whether the signed numbers are consistent or not;
when the reset test is carried out, after the parameters of the frequency converter 200 are modified and successfully confirmed, a parameter reset command is sent, then the parameter values of the frequency converter 200 are read, whether the parameter reset is finished or not is judged, and whether the parameter reset is consistent or not is judged by comparing the parameter reset command with the data in the test parameter standard value list;
when the EEPROM test is carried out, the parameters of the frequency converter 200 are written and modified and are confirmed to be successful, and then a user is reminded to power off and restart the frequency converter; and the user selects 'power-off restart completion' after power-off restart, then the system sends an instruction for reading the parameter value of the frequency converter 200, compares the later read parameter value with the value written before power-off, compares the comparison data with the data in the test parameter standard value list, and judges whether the comparison data is consistent with the data in the test parameter standard value list.
Specifically, the generated test report is stored in the database, can be viewed in the system, and can also be exported in a document form, specifically, through a list or a list display, or in other forms, which are not limited herein.
The frequency converter parameter testing method can efficiently complete the test of mass parameters of the frequency converter, and output the test result, thereby realizing the comprehensive and automatic test of the correctness of the parameters of the frequency converter. The method adopts a machine to replace manual automatic testing, and has the advantages of high testing speed, high efficiency and low error rate; and the operation is simple, and the cost is saved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A frequency converter parameter testing system is characterized in that: the device comprises an upper computer which can be in communication connection with a frequency converter; the upper computer comprises a communication configuration module, a parameter acquisition module, a test selection module, a test list module, a test execution module and a test report generation module;
the communication configuration module is used for configuring communication settings between the upper computer and the frequency converter;
the parameter acquisition module is used for acquiring the parameters of the frequency converter and the standard values thereof, and is also used for generating a parameter list and storing the parameter list into the test selection module for later use;
the test selection module is used for receiving a parameter selection instruction of a user and generating a parameter set to be tested according to the parameter selection instruction;
the test list module is used for generating a test parameter standard value list according to the parameters of the frequency converter and the standard values thereof acquired by the parameter acquisition module;
the test execution module is used for performing parameter test on the frequency converter according to the parameter set to be tested generated by the test selection module, comparing test data with corresponding data of the test parameter standard value list, judging whether the test data are consistent with the corresponding data, obtaining a comparison result, and then sending the comparison result to the test report generation module;
the test report generation module generates a test report.
2. The frequency converter parameter testing system of claim 1, wherein: the communication setting includes: the device comprises a frequency converter type, a protocol type, a device address, a communication mode, a port number, a baud rate, a verification mode and a data length.
3. The frequency converter parameter testing system of claim 1, wherein: the parameter acquisition module specifically acquires the parameters of the frequency converter and the standard values thereof by importing in a file form.
4. A frequency converter parameter testing system according to any one of claims 1 to 3, characterized in that: the test selection module is also used for providing an interactive interface for receiving user instructions.
5. A method for testing parameters of a frequency converter is characterized by comprising the following steps: the frequency converter parameter testing system applied to any one of claims 1 to 4, the method comprises the following steps:
the communication configuration module configures communication settings between the upper computer and the frequency converter; finishing the communication connection between the upper computer and the frequency converter;
the parameter acquisition module acquires the parameters of the frequency converter and the standard values thereof, and generates a parameter list to be stored in the test selection module for later use;
the test selection module receives a parameter selection instruction of a user and generates a parameter set to be tested according to the parameter selection instruction;
the test list module generates a test parameter standard value list according to the parameters of the frequency converter and the standard values thereof acquired by the parameter acquisition module;
the test execution module performs parameter test on the frequency converter according to the parameter set to be tested generated by the test selection module, compares the obtained test data with corresponding data of the test parameter standard value list, judges whether the test data are consistent or not, obtains a comparison result, and then sends the comparison result to the test report generation module;
the test report generation module generates a test report.
6. The frequency converter parameter testing method of claim 5, wherein: the communication setting includes: the device comprises a frequency converter type, a protocol type, a device address, a communication mode, a port number, a baud rate, a verification mode and a data length.
7. The frequency converter parameter testing method of claim 5, wherein: the specific method for the test execution module to perform the parameter test on the frequency converter comprises the following steps:
when the test parameter is a character string type variable, the test execution module reads the related character string type variable in the frequency converter, and then compares the related character string type variable with the corresponding parameter standard value in the test parameter standard value list to judge whether the related character string type variable is consistent with the corresponding parameter standard value in the test parameter standard value list;
when testing the default value, firstly resetting the relevant parameters of the frequency converter, then reading the numerical value of the parameters in the frequency converter, then comparing the numerical value with the corresponding parameter standard value in the test parameter standard value list, and judging whether the numerical value is consistent with the parameter standard value;
when testing the maximum value and the minimum value, firstly reading the maximum value or the minimum value of the parameter in a testing parameter standard value list, writing the standard value into the parameter of the frequency converter, if the writing is successful, adding a unit value or subtracting a unit value from the maximum value or the minimum value, writing the maximum value or the minimum value into the corresponding parameter, if the writing is successful, judging that the maximum value or the minimum value is inconsistent, and if the writing is unsuccessful, judging that the maximum value or the minimum value is consistent;
when the decimal point is tested, reading out related parameter values in the frequency converter, judging the decimal number, comparing the decimal number with the corresponding parameter standard value in the test parameter standard value list, wherein the decimal number is the same as the decimal number, and the decimal number is different if the decimal number is the same;
when the test of parameter reading, writing and online modification is carried out, and when the frequency converter does not run, parameter values are read, written and modified; sending an operation command, and respectively sending commands of reading, writing and modifying parameter values after the frequency converter operates; comparing the attribute data with attribute data in the test parameter standard value list, and judging whether the attribute data are consistent with the attribute data;
when the signed test is carried out, writing positive and negative numbers into corresponding parameters of the frequency converter to judge whether the number is signed or not by the success of the writing, comparing the number with data in the test parameter standard value list and judging whether the number is consistent or not;
when the reset test is carried out, after the parameters of the frequency converter are modified and successfully confirmed, a parameter reset command is sent, then the parameter values of the frequency converter are read, whether the parameter reset is finished or not is judged, and whether the parameter reset is consistent or not is judged by comparing the parameter reset command with the data in the test parameter standard value list;
when the EEPROM test is carried out, the parameters of the frequency converter are written and modified and are confirmed to be successful, and then a user is reminded to power off and restart the frequency converter; and the user selects 'power-off restart completion' after power-off restart, then the system sends an instruction for reading the parameter value of the frequency converter, compares the later read parameter value with the value written before power-off, compares the comparison data with the data in the test parameter standard value list, and judges whether the comparison data is consistent with the data in the test parameter standard value list.
8. The frequency converter parameter testing method according to any one of claims 5 to 7, characterized in that: the parameter acquisition module specifically acquires the parameters of the frequency converter and the standard values thereof by importing in a file form.
9. The frequency converter parameter testing method according to any one of claims 5 to 7, characterized in that: the test selection module provides an interactive interface for receiving user instructions.
10. The frequency converter parameter testing method according to any one of claims 5 to 7, characterized in that: the character string type variables are Chinese notes, English notes or units.
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| CN104155972A (en) * | 2014-08-21 | 2014-11-19 | 广西柳工机械股份有限公司 | Mechanical engineering electronic controller parameter debugging method |
| CN104331017A (en) * | 2014-11-12 | 2015-02-04 | 深圳市英威腾电气股份有限公司 | Method and device for realizing programmable logic control function of frequency converter as well as frequency converter |
| WO2017036068A1 (en) * | 2015-08-28 | 2017-03-09 | 中兴通讯股份有限公司 | Method and system for realizing software automatic test |
| CN108363375A (en) * | 2017-12-13 | 2018-08-03 | 中冶南方（武汉）自动化有限公司 | A kind of electric machine controller tests realization method and system automatically |
| CN108267659A (en) * | 2018-03-09 | 2018-07-10 | 上海辛格林纳新时达电机有限公司 | A kind of frequency converter test platform and frequency converter test method |
| CN108919100A (en) * | 2018-07-19 | 2018-11-30 | 珠海格力电器股份有限公司 | A kind of debugging system and method for frequency-changeable compressor driving |
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| CN113534711A (en) * | 2021-07-14 | 2021-10-22 | 珠海格力电器股份有限公司 | Debugging method and device of frequency converter, storage medium and frequency converter |
| 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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