CN113406948A

CN113406948A - Fault data processing method and device, frequency converter, air conditioning equipment and storage medium

Info

Publication number: CN113406948A
Application number: CN202110688444.9A
Authority: CN
Inventors: 王豪浩; 洪伟鸿; 陈俊桦; 范波
Original assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Current assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2021-09-17
Anticipated expiration: 2041-06-21
Also published as: WO2022267436A1; CN113406948B

Abstract

The application is applicable to the technical field of frequency converters, and provides a fault data processing method, a fault data processing device, a frequency converter, air conditioning equipment and a storage medium, wherein the method comprises the following steps: sampling working parameters of a motor to obtain corresponding first sampling data; if the frequency converter fails, storing fault data of the frequency converter, wherein the fault data is first sampling data obtained when the frequency converter fails; and sending the fault data to a communication device. By the method, convenience of maintenance personnel in maintaining the frequency converter is improved.

Description

Fault data processing method and device, frequency converter, air conditioning equipment and storage medium

Technical Field

The application belongs to the technical field of frequency converters, and particularly relates to a fault data processing method and device, a frequency converter, air conditioning equipment and a storage medium.

Background

The frequency converter is a device adopting a frequency conversion technology, and due to the fact that the frequency converter is complex in operation condition and generally needs to work for a long time, accidental faults are inevitable.

For a frequency converter for controlling a high-speed running motor, an oscilloscope is generally needed to monitor a waveform corresponding to a performance parameter of the motor, and then specific working condition data is combined to judge whether the current running of the motor is normal or not, and when the current running of the motor is abnormal, a corresponding fault reason is analyzed. However, since the oscilloscope has a certain volume, the oscilloscope needs to be carried every time the frequency converter is maintained, thereby bringing great inconvenience to maintenance personnel.

Disclosure of Invention

The embodiment of the application provides a fault data recording method, which can solve the problem of inconvenience caused by the fact that in the prior art, in order to detect the fault of a frequency converter, maintenance personnel need to carry an oscilloscope.

In a first aspect, an embodiment of the present application provides a fault data processing method, which is applied to a frequency converter, and the method includes:

sampling working parameters of a motor to obtain corresponding first sampling data;

if the frequency converter fails, storing fault data of the frequency converter, wherein the fault data is first sampling data obtained when the frequency converter fails;

and sending the fault data to a communication device.

In a second aspect, an embodiment of the present application provides a method for processing fault data, which is applied to a communication device, and includes:

receiving fault data sent by a frequency converter, wherein the fault data is used as fault data to be matched;

determining a fault reason corresponding to the fault data to be matched according to the fault data to be matched and different standard fault data, wherein the standard fault data are fault data corresponding to the frequency converter when the frequency converter fails due to the fault reason;

and outputting the fault reason.

In a third aspect, an embodiment of the present application provides a fault data processing apparatus, which is applied to a frequency converter, and includes:

the first sampling module is used for sampling working parameters of the motor to obtain corresponding first sampling data;

the fault data storage module is used for storing fault data of the frequency converter if the frequency converter fails, wherein the fault data is first sampling data obtained when the frequency converter fails;

and the fault data sending module is used for sending the fault data to the communication equipment.

In a fourth aspect, an embodiment of the present application provides a fault data processing apparatus, which is applied to a communication device, and includes:

the fault data receiving module is used for receiving fault data sent by the frequency converter, and the fault data is used as fault data to be matched;

the fault cause determining module is used for determining a fault cause corresponding to the fault data to be matched according to the fault data to be matched and different standard fault data, wherein the standard fault data are the fault data corresponding to the fault cause;

and the fault reason output module is used for outputting the fault reason.

In a fifth aspect, an embodiment of the present application provides a frequency converter, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method according to the first aspect when executing the computer program.

In a sixth aspect, embodiments of the present application provide an air conditioning apparatus, including the inverter according to the fifth aspect.

In a seventh aspect, an embodiment of the present application provides a communication device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the method according to the second aspect when executing the computer program.

In an eighth aspect, the present application provides a storage medium storing a computer program, which when executed by a processor implements the method according to the first and/or second aspect.

In a ninth aspect, embodiments of the present application provide a computer program product, which, when run on an air conditioning apparatus, causes the air conditioning apparatus to perform the method of the first aspect and/or the second aspect.

Compared with the prior art, the embodiment of the application has the advantages that:

in the embodiment of the application, the working parameters of the motor are collected through the frequency converter, when the frequency converter is judged to have a fault, fault data (namely first sampling data collected when the frequency converter has the fault) are stored, and then the fault data are sent to the communication equipment. Because the frequency converter can acquire fault data, maintenance personnel do not need to carry an oscilloscope when maintaining the frequency converter, the burden of the maintenance personnel is greatly reduced, and the convenience of the maintenance personnel in maintaining the frequency converter is improved. Meanwhile, as the fault data can be sent to the communication equipment by the frequency converter, maintenance personnel can acquire the relevant fault data only through the communication equipment, namely, the fault data of the frequency converter can be acquired without going to the door, so that the selection of more suitable maintenance personnel for going to the door for maintenance is facilitated, and the maintenance efficiency of the frequency converter is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the embodiments or the description of the prior art will be briefly described below.

Fig. 1 is an interaction schematic diagram of a frequency converter and a communication device according to an embodiment of the present application;

fig. 2 is a flowchart of a fault data processing method applied to a frequency converter according to an embodiment of the present application;

fig. 3 is a flowchart illustrating another fault data processing method applied to a frequency converter according to the second embodiment of the present application;

fig. 4 is a flowchart of a fault data processing method applied to a communication device according to a third embodiment of the present application;

fig. 5 is a schematic waveform diagram obtained according to reconstruction of fault data sent by a frequency converter according to a third embodiment of the present application;

fig. 6 is a schematic waveform diagram corresponding to an overcurrent fault displayed by an oscilloscope according to a third embodiment of the present application;

fig. 7 is a schematic structural diagram of a fault data processing apparatus applied to a frequency converter according to a fourth embodiment of the present application;

fig. 8 is a schematic structural diagram of a fault data processing apparatus applied to a communication device according to a fifth embodiment of the present application;

fig. 9 is a schematic structural diagram of a frequency converter according to a sixth embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device according to a seventh embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

Furthermore, in the description of the present application and the appended claims, the terms "first," "second," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise.

The first embodiment is as follows:

fig. 1 shows an interaction diagram of a frequency converter and a communication device provided in an embodiment of the present application. In fig. 1, the frequency converter itself collects and stores fault data. And when the communication equipment receives the fault data sent by the frequency converter, determining a fault reason corresponding to the fault data, and outputting the fault reason. Because the fault data is collected by the frequency converter, maintenance personnel do not need to carry an oscilloscope when maintaining the frequency converter, and the convenience of the maintenance personnel in maintaining the frequency converter is improved. Meanwhile, the fault data can be sent to the communication equipment by the frequency converter, so that maintenance personnel can acquire the related fault data only through the communication equipment, namely, the fault data of the frequency converter can be acquired without going to the door, and therefore, more suitable maintenance personnel can be selected to perform maintenance at the door, and maintenance efficiency is effectively improved.

The following describes a fault data processing method provided in an embodiment of the present application with reference to the drawings.

Fig. 2 shows a flowchart of a first fault data processing method provided in an embodiment of the present application, which is applied to a frequency converter, for example, a Micro Controller Unit (MCU) of the frequency converter performs the following steps, which are detailed as follows:

step S21, sampling the working parameters of the motor to obtain corresponding first sampling data;

the working parameters of the motor are mainly parameters related to the working of the motor.

It is known by those skilled in the art through analysis that the values of the operating parameters of the motor are generally affected when the frequency converter fails. That is, when the frequency converter fails, the corresponding value of the operating parameter of the motor and the frequency converter generally changes.

In some embodiments, because the time point when the frequency converter fails cannot be predetermined, in order to timely acquire the working parameters corresponding to the motor when the frequency converter fails, the working parameters of the motor are sampled cyclically at a preset sampling period.

Step S22, if the frequency converter fails, storing fault data of the frequency converter, wherein the fault data is first sampling data obtained when the frequency converter fails;

in this embodiment, when it is determined that a fault occurs in the frequency converter (for example, a fault code is generated), the currently acquired first sampling data (i.e., fault data) is stored, so that the fault occurring in the frequency converter can be determined and maintained after the fault data is analyzed subsequently.

In some embodiments, the first sampling data from before the frequency converter fails to a period of time after the frequency converter fails is stored, that is, the first sampling data corresponding to before the frequency converter fails (or before the frequency converter will fail and after the frequency converter will fail) is stored, and the failure data is also stored. In this way, the first sampling data corresponding to the data before the fault occurs (or before the fault occurs and after the fault occurs) can be compared with the first sampling data (namely fault data) when the fault occurs, and then the fault reason can be determined according to the comparison result. Due to the fact that the comparison information is added, the accuracy of the determined fault reason can be effectively improved.

Step S23, the failure data is transmitted to the communication device.

In this embodiment, the frequency converter may interact with the communication device through any one of serial communication, Inter-Integrated Circuit (I2C), Controller Area Network (CAN), bluetooth, and the like. For example, if the communication device supports I2C, the frequency converter interacts with the communication device through I2C, i.e., the frequency converter transmits fault data to the communication device through I2C.

Example two:

fig. 3 shows a flowchart of a fault data processing method provided in an embodiment of the present application, where the method is applied to a frequency converter. In this embodiment, in addition to storing fault data, fault information is also stored, which is detailed as follows:

step S31, sampling the working parameters of the motor to obtain corresponding first sampling data;

Step S32, if the frequency converter fails, storing fault data of the frequency converter, wherein the fault data is first sampling data obtained when the frequency converter fails;

in some embodiments, if the frequency converter stores fault data corresponding to multiple faults, in order to distinguish fault data corresponding to different faults, a corresponding unique identifier is set for the fault data. For example, time is used as the unique identifier corresponding to the failure data.

In some embodiments, the frequency converter further stores the first sampled data before and for a period of time after the frequency converter fails. In this way, the failure cause can be determined subsequently by combining the corresponding first sampling data before (or before and after) the failure. Due to the fact that the comparison information is added, the accuracy of the determined fault reason can be effectively improved.

Step S33, the failure data is transmitted to the communication device.

In this embodiment, the frequency converter may interact with the communication device through any one of the communication modes such as serial communication, I2C, CAN, bluetooth, and the like. For example, if the communication device supports I2C, the frequency converter interacts with the communication device through I2C, i.e., the frequency converter transmits fault data to the communication device through I2C.

Step S34, sampling the working parameters of the frequency converter to obtain corresponding second sampling data;

the working parameters of the frequency converter are mainly parameters related to the working of the frequency converter.

In this embodiment, the second sampling data is sampling data obtained by periodically sampling the operating parameters of the frequency converter, or may be sampling data obtained by sampling the operating parameters of the frequency converter only when the frequency converter fails. Specifically, when the second sampling data is sampling data obtained by periodically sampling the operating parameters of the frequency converter, the second sampling data may be corresponding sampling data when the frequency converter fails, may be corresponding sampling data before the frequency converter fails, and may also be corresponding sampling data after the frequency converter fails. And when the second sampling data is sampling data obtained by sampling the working parameters of the frequency converter when the frequency converter fails, the second sampling data is only corresponding sampling data when the frequency converter fails.

Step S35, storing fault information of the frequency converter, wherein the fault information is second sampling data obtained when the frequency converter fails;

in this embodiment, it is considered that a maintenance worker only needs to pay attention to fault information corresponding to a fault of the frequency converter, or pay attention to fault information corresponding to the frequency converter before and after the fault occurs, and the more the stored fault information is, the larger the storage space occupied by the frequency converter is, in this embodiment, only second sampling data (i.e., fault information) corresponding to the fault of the frequency converter is stored, or second sampling data (i.e., second sampling data corresponding to the frequency converter before the fault occurs (e.g., 1 second before the fault occurs) and second sampling data corresponding to the frequency converter after the fault occurs (e.g., 1 second after the fault occurs)) corresponding to the frequency converter before the fault occurs and after the fault occurs are stored, and the rest of the second sampling data do not need to be stored.

Step S36, the failure information is sent to the communication device.

In this embodiment, the frequency converter may interact with the communication device through any one of communication modes such as serial port communication, I2C, CAN, bluetooth, and the like, so as to send the fault information to the communication device.

In the embodiment of the application, the frequency converter stores fault data and fault information, the fault data reflects the work of the motor, and the fault information reflects the work of the frequency converter. Therefore, after the fault data and the fault information are sent to the communication equipment, the communication equipment analyzes the fault data and the fault information together, and a more accurate fault reason can be obtained.

In some embodiments, the fault data and fault information described above are transmitted to the communication device together to reduce the number of transmissions.

In some embodiments, if the fault data is fault data corresponding to different time periods, for example, before the fault data is sent to the communication device, the frequency converter has failed 3 times in 3 time periods, that is, the frequency converter stores the fault data corresponding to 3 time periods, in order to facilitate the subsequent communication device to identify which fault data the fault information corresponds to, the frequency converter further sets a corresponding unique identifier for the fault data and the fault information. It should be noted that the fault data and the fault information of the same fault correspond to the same unique identifier, and the unique identifier may be represented by time.

In some embodiments, in order to obtain sample data that reflects global trends and local details, the operating parameters of the motor are sampled using 2 different sampling periods. For example, assume that 2 sampling periods are a first sampling period and a second sampling period, respectively, and the first sampling period is smaller than the second sampling period. Setting a first sampling period to be determined according to the motor rotating speed of the frequency converter (namely, the sampling period for acquiring first sampling data), wherein the first sampling period is a dynamic value; the second sampling period is set to a fixed value.

The motor speed here refers to the speed of the motor of the frequency converter.

In this embodiment, since the rotation speed of the motor has an influence on the electrical cycle of the frequency converter, in order to obtain waveform data of at least 2 (or more than 5) electrical cycles and ensure that the recovered waveform has an undistorted effect, the first sampling period is set to be related to the rotation speed of the motor.

In some embodiments, in order to obtain more accurate sampling data, a corresponding first sampling period is set according to a range in which a motor rotation speed is located, and at this time, determining the first sampling period according to the motor rotation speed of the frequency converter specifically includes:

a1, if the motor speed of the frequency converter is smaller than the first speed value, setting t1 as a first sampling period. The first rotational speed value here may be 3000 rpm. Assuming that the first rotation speed value is 3000rpm, if the motor rotation speed is less than 3000rpm, data is recorded every 4 carrier periods, i.e., t1 is 4/f1, where f1 is the carrier frequency of the frequency converter, i.e., f1 is calculated according to the motor rotation speed, and then t1 is determined according to f 1.

A2, if the motor speed of the frequency converter is greater than or equal to the first speed value and less than the second speed value, setting t2 as a first sampling period. Wherein the second rotation speed value here may be 6000 rpm. Assuming that the first rotation speed value is 3000rpm and the second rotation speed value is 6000rpm, if 3000rpm < the motor rotation speed <6000rpm, data is recorded every 2 carrier periods, i.e. t2 is 2/f2, where f2 is the carrier frequency of the frequency converter, i.e. f2 is calculated according to the motor rotation speed, and then t2 is determined according to f 2.

A3, if the motor speed of the frequency converter is larger than or equal to the second speed value, setting t3 as a first sampling period. Assuming that the second rotation speed value is 6000rpm, if 6000rpm < the motor rotation speed, data is recorded every 1 carrier period, i.e., t3 is 1/f3, where f3 is the carrier frequency of the frequency converter, i.e., f3 is calculated according to the motor rotation speed, and then t3 is determined according to f 3.

Where t3< t2< t1< second sampling period.

In the above-mentioned a 1-A3, because the corresponding first sampling period is set according to the size of the motor speed, the set first sampling period is more attached to the motor speed, so that it is ensured that more accurate first sampling data is obtained when the working parameters of the motor are collected according to the set first sampling period.

In some embodiments, the operating parameters of the electric machine include at least one of: motor current, bus voltage, motor speed, and motor back electromotive voltage.

The working parameters of the frequency converter comprise at least one of the following parameters: time of occurrence of a fault, Power supply voltage, motor rotation speed, system exhaust pressure, ambient temperature, and temperature of an Intelligent Power Module (IPM); wherein, the time of the fault is the difference between the time of the fault and the time of starting the motor.

In the present embodiment, the "current" may be a phase current of the motor, for example, a U-phase current, a V-phase current, and a W-phase current. When the number of items contained in the working parameters of the motor is more and/or the number of items contained in the working parameters of the frequency converter is more, the amount of information which can be acquired by the subsequent communication equipment according to the working parameters of the motor and the working parameters of the frequency converter is larger, that is, the failure cause determined by the subsequent communication equipment is more accurate.

In some embodiments, after step S21 (or step S31), comprising:

recording N1 data in the first sampling data to a random access memory of the frequency converter at intervals of a preset sampling period, wherein N1 is determined according to the number of the random access memories of the frequency converter and the capacity of a single random access memory, and N1 is a natural number larger than 9;

step S22 (or step S32), including:

and if the frequency converter has a fault, storing fault data recorded in the random access memory into the storage device.

In this embodiment, if the preset sampling period is one sampling period, the ratio of N1 to the RAM space of the frequency converter is set to be less than 1/2, so as to avoid that the frequency converter runs slowly due to excessive occupation of the RAM. Assuming that the path length of the fabric array in RAM is 128(16bit), N1 can be set to 128 as described above. If the first sampling data includes a U-phase current (U-phase current instantaneous value), a bus voltage, and a motor speed, the RAM records the first sampling data, and then the RAM occupies a space of 128 × 2 × 3 — 768 bytes. In the embodiment, the first sampling data is recorded in the RAM of the frequency converter, so that when a fault occurs, the recorded fault data is directly stored in the storage device to obtain corresponding fault data, and certain fault data cannot be missed. In addition, as the collected first sampling data are not directly stored in the storage device, the memory of the storage device is not occupied.

In some embodiments, the storage device comprises at least one of: an electrically Erasable Read-only Memory (EEPROM), a Flash Memory (Flash Memory), a Universal Serial Bus (USB) Mass Storage Device (U-disc), a Secure Digital Memory Card (SD Card), and the like.

In some embodiments, a user (e.g., a maintenance person) may need to check operation data of the frequency converter during normal operation, and then the frequency converter also sends the recorded first sampling data to the communication device, that is, the method provided in this embodiment of the present application further includes:

if the first preset condition is met, sending the recorded first sampling data to the communication equipment, wherein the first preset condition comprises that: and receiving an operation data extraction instruction or reaching an operation data uploading time point.

In this embodiment, assuming that the frequency converter receives an operation data extraction instruction sent by the communication device, the frequency converter sends first sampling data to the communication device, where the first sampling data is first sampling data recorded by the RAM, or after the RAM updates the first sampling data recorded by the RAM, sends the updated first sampling data to the communication device. Or, assuming that another device (e.g., a mobile phone) sends an operation data extraction instruction to the frequency converter, but the operation data extraction instruction also carries information of a communication device (e.g., a server), that is, the mobile phone sends the operation data extraction instruction to the frequency converter to instruct the frequency converter to send corresponding first sampling data to the server, and the frequency converter also sends the first sampling data to the server. Of course, if the first preset condition is that the operation data upload time point arrives, the frequency converter sends the first sampling data to the communication device if the current time point is the operation data upload time point.

In some embodiments, considering that the frequency converter consumes a certain resource when continuously communicating with the communication device, and therefore, the fault data and the fault information are only sent to the communication device when the second preset condition is met, in this case, the step S23 (or step S33) includes:

if the second preset condition is met, sending the stored fault data to the communication equipment, wherein the second preset condition comprises that: receiving a fault data extraction instruction or the arrival of a fault data uploading time point;

the step S36 includes:

and if the second preset condition is met, sending the stored fault information to the communication equipment.

In this embodiment, when it is determined that the current condition satisfies the second preset condition, the fault data and the fault information are sent to the communication device. It should be noted that the above-mentioned fault data extraction instruction may be transmitted by the communication device itself, or may be transmitted by another device.

In some embodiments, if the MCU of the frequency converter controls a plurality of motors, the step S31 (or step S21) specifically includes: and respectively sampling the working parameters of each motor to obtain corresponding first sampling data.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Example three:

fig. 4 is a flowchart illustrating a fault data processing method provided in a third embodiment of the present application, where the method is applied to a communication device interacting with the frequency converter in the first embodiment (or the second embodiment), where the communication device includes: the system comprises an upper computer, a mobile terminal (such as a mobile phone and a tablet personal computer), a cloud server and the like. In this embodiment, after receiving the fault data from the frequency converter, the communication device analyzes the fault cause corresponding to the fault data and outputs the fault cause. The details are as follows:

step S41, receiving fault data sent by the frequency converter, wherein the fault data is used as fault data to be matched;

in this embodiment, the fault data is first sampling data obtained by sampling a working parameter of the motor by the frequency converter when the frequency converter fails.

In some embodiments, the interaction of the communication device with the frequency converter comprises any one of: serial communication, I2C, CAN, Bluetooth.

Step S42, determining a fault reason corresponding to the fault data to be matched according to the fault data to be matched and different standard fault data, wherein the standard fault data are corresponding to the fault data when the frequency converter fails due to the fault reason;

in this embodiment, fault data corresponding to different faults of the frequency converter are obtained in advance, and the fault data are used as standard fault data. After receiving the fault data to be matched from the frequency converter, comparing the fault data to be matched with the standard fault data, and determining the fault reason of the frequency converter according to the comparison result, for example, using the fault reason corresponding to the most matched standard fault data as the fault reason corresponding to the fault data to be matched.

In some embodiments, the standard fault data may be obtained by the communication device itself through pre-sorting, or the communication device may obtain the standard fault data from the auxiliary server by pre-sorting the operating parameters of the motor in different fault modes through the auxiliary server.

In step S43, the failure cause is output.

In this embodiment, the output mode of the failure cause includes any one of the following: and voice broadcasting, displaying specific fault reasons in a text mode on an interface, generating a specific fault analysis report and printing. Wherein, the fault analysis report includes a fault reason.

In the embodiment of the application, the communication device can directly acquire the fault data to be matched corresponding to the fault of the frequency converter from the frequency converter, so that the communication device can determine the fault reason corresponding to the fault data to be matched according to the fault data to be matched and the standard fault data. That is, the fault data to be matched can be acquired without the need of carrying on the oscilloscope by maintenance personnel, so that the convenience of acquiring the fault data to be matched can be greatly improved, and the efficiency of acquiring the fault reason is also greatly improved. Further, the fault reason can be determined in advance, so that more appropriate maintenance personnel can be assigned to perform home maintenance according to the fault reason, the maintenance success rate can be improved, and the good experience of a user can be improved.

In some embodiments, the frequency converter sends the corresponding fault data to be matched to the communication device only after receiving the fault data extraction instruction sent by the communication device, that is, before the step S41, the method includes:

and sending a fault data extraction instruction to the frequency converter.

In this embodiment, the communication device does not need to constantly monitor whether the frequency converter sends the fault data to be matched, and therefore the communication device does not need to constantly establish communication connection with the frequency converter, and resources of the communication device can be saved.

In some embodiments, the step S41 includes: and when the fault data uploading time point arrives, the communication equipment receives the fault data to be matched, which is sent by the frequency converter.

In some embodiments, in order to obtain a more accurate fault cause, the communication device further receives fault information to be matched from the frequency converter, that is, the method further includes:

receiving fault information sent by a frequency converter, wherein the fault information is used as fault information to be matched;

correspondingly, step S42 includes:

and determining a fault reason corresponding to the fault data to be matched according to the fault data to be matched, the standard fault data, the fault information to be matched and the standard information before fault, wherein the standard information before fault is the fault information before the fault of the frequency converter occurs.

Specifically, the fault information to be matched is a working parameter of the frequency converter corresponding to the fault of the frequency converter. The working parameters of the frequency converter comprise at least one of the following parameters: time of occurrence of the fault, power supply voltage, motor speed, system exhaust pressure, ambient temperature, and temperature of the IPM module.

In this embodiment, the fault information corresponding to the frequency converter before various faults occur is obtained in advance, and the obtained fault information is used as standard information before the faults occur. Because the fault data to be matched and the fault information to be matched are different information, the communication equipment combines the fault data to be matched and the fault information to be matched to judge the fault reason corresponding to the fault data to be matched, and the accuracy of the obtained judgment result can be improved. For example, suppose it is known that the time when the fault occurs is close to "0", i.e., it indicates that the motor has failed at the time of starting, and the cause of the fault at this time is usually "motor is bad". Namely, the data to be matched and the fault information to be matched are combined to determine the fault reason, so that the accuracy and the speed of the determined fault reason can be improved.

In some embodiments, the communication device sends a fault data extraction instruction to the frequency converter, the frequency converter sends the to-be-matched fault information and the to-be-matched fault data to the communication device, and the communication device receives the to-be-matched fault information and the to-be-matched fault data.

In some embodiments, in order to be able to monitor the operation of the frequency converter, the method further comprises:

b1, receiving first sampling data sent by the frequency converter;

and B2, analyzing the current operation state of the frequency converter according to the first sampling data.

Specifically, the first sampling data is sampling data corresponding to the frequency converter when no error is reported. In this embodiment, the communication device may compare the received first sampling data with pre-acquired standard operation data (i.e., operating parameters of a motor corresponding to the frequency converter during normal operation), and if the received first sampling data and the pre-acquired standard operation data are matched, determine that the current operation state of the frequency converter is good, otherwise, determine that the current operation state of the frequency converter is poor.

In some embodiments, the frequency converter transmits the first sampled data to the communication device only when the communication device wishes to acquire the first sampled data. At this time, before step B1, the method further includes:

and the communication equipment sends an operation data extraction instruction to the frequency converter.

In this embodiment, since the first sampling data sent by the frequency converter is received only after the communication device sends the operation data extraction instruction to the frequency converter, the frequency converter does not need to be monitored all the time, thereby reducing resource consumption of the communication device.

In some embodiments, in order to allow the maintenance personnel to visually check the matching result, the step S42 includes:

c1, performing waveform reconstruction on the fault data to be matched to obtain a fault waveform to be matched;

fig. 5 shows a fault waveform to be matched reconstructed according to the U-phase current and the bus voltage when the frequency converter has an overcurrent fault, and fig. 6 is a waveform diagram obtained by collecting the frequency converter having the overcurrent fault by using an oscilloscope. As can be seen from the waveform diagrams of fig. 5 and 6, the trend of the waveform obtained by reconstructing the fault data sent by the frequency converter is substantially consistent with that of the waveform acquired by the oscilloscope, so that the subsequent analysis of the fault reason by directly using the fault data sent by the frequency converter is also consistent with that of the waveform acquired by the oscilloscope. That is, the accuracy of the obtained fault reason can be ensured by analyzing the fault reason by adopting the fault data sent by the frequency converter.

And C2, comparing the fault waveform to be matched with the standard fault waveforms corresponding to different standard fault data, and determining the fault reason corresponding to the fault data to be matched according to the comparison result.

In the above C1 and C2, the fault data to be matched is reconstructed into a fault waveform to be matched, and then the fault waveform to be matched is compared with the standard fault waveform. For example, the variation trends of the two waveforms are compared, and if the variation trends of the two waveforms are consistent, the two waveforms are determined to be matched waveforms, and then the fault cause corresponding to the matched standard fault waveform is used as the fault cause corresponding to the fault waveform to be matched. After the waveform is reconstructed, maintenance personnel can more directly check the variation trend of the fault data to be matched, so that the maintenance personnel can visually check the matching degree of the fault waveform to be matched and the standard fault waveform, and further the maintenance personnel can evaluate the accuracy degree of the obtained fault reason.

In some embodiments, when the frequency converter has a fault due to different fault reasons, the fault data (or the fault data and the fault information) corresponding to the frequency converter may be similar in some aspects, so that in order to facilitate a maintenance worker to obtain more information, in the embodiment of the present application, when determining the fault reason corresponding to the fault data to be matched, the method further includes:

determining the probability of the frequency converter as a fault cause;

correspondingly, the method further comprises the following steps:

and outputting the probability of the fault reason.

In this embodiment, there may be a plurality of output fault causes, and when the fault cause is output, a probability that the fault cause causing the fault of the frequency converter is the output fault cause is also output. For example, assuming that the cause of the fault is "motor overload" and the probability is "40%", it indicates that the cause of the fault in the frequency converter is "motor overload" and the probability is "40%".

Example four:

corresponding to the first embodiment and the second embodiment, fig. 7 is a schematic structural diagram of a fault data processing apparatus provided in the first embodiment of the present application, where the fault data processing apparatus is applied to a frequency converter, and for convenience of description, only the parts related to the first embodiment of the present application are shown:

the failure data processing device 7 includes: a sampling module 71, a fault data storage module 72 and a fault data sending module 73. Wherein:

the first sampling module 71 is configured to sample the working parameters of the motor to obtain corresponding first sampling data;

The fault data storage module 72 is configured to store fault data of the frequency converter if the frequency converter fails, where the fault data is first sampling data obtained when the frequency converter fails;

in some embodiments, the first sampled data is stored for a period of time before the frequency converter fails and after the frequency converter fails. That is, the first sample data corresponding to the data before the occurrence of the failure (or before the occurrence of the failure and after the occurrence of the failure) is stored, and the failure data is also stored.

And a fault data sending module 73, configured to send fault data to the communication device.

In this embodiment, the frequency converter may interact with the communication device through any one of the communication modes such as serial communication, I2C, CAN, bluetooth, and the like.

In some embodiments, the fault data processing apparatus 7 further comprises:

the second sampling module is used for sampling the working parameters of the frequency converter to obtain corresponding second sampling data;

the fault information storage module is used for storing fault information of the frequency converter, and the fault information is second sampling data obtained when the frequency converter breaks down;

in some embodiments, the fault information storage module is further configured to store second sampled data corresponding to the frequency converter before the fault occurs (for example, 1 second before the fault occurs) and second sampled data corresponding to the frequency converter after the fault occurs (for example, 1 second after the fault occurs).

And the fault information sending module is used for sending the fault information to the communication equipment.

In some embodiments, corresponding unique identifiers are set for the fault data and fault information obtained at different times. It should be noted that the fault data and the fault information of the same fault correspond to the same unique identifier, and the unique identifier may be represented by time.

In some embodiments, the operating parameters of the frequency converter include at least one of: time of occurrence of a fault, Power supply voltage, motor rotation speed, system exhaust pressure, ambient temperature, and temperature of an Intelligent Power Module (IPM); wherein, the time of the fault is the difference between the time of the fault and the time of starting the motor.

In some embodiments, the fault data processing apparatus 7 further comprises:

the first sampling data recording module is used for recording N1 data in the first sampling data to a random access memory of the frequency converter at intervals of a preset sampling period, wherein N1 is determined according to the number of the random access memories of the frequency converter and the capacity of a single random access memory, and N1 is a natural number larger than 9;

the failure data storage module 72 is specifically configured to:

In this embodiment, if the preset sampling period is one sampling period, the ratio of N1 to the RAM space of the frequency converter is set to be less than 1/2, so as to avoid that the frequency converter runs slowly due to excessive occupation of the RAM.

In some embodiments, a user (e.g. a maintenance person) may need to check the operation data of the frequency converter during normal operation, and the frequency converter also sends the recorded first sampling data to the communication device, i.e. the fault data processing apparatus 7 includes:

the first preset condition judgment module is configured to send the recorded first sampling data to the communication device if a first preset condition is met, where the first preset condition includes: and receiving an operation data extraction instruction or reaching an operation data uploading time point.

In some embodiments, considering that when the frequency converter continuously communicates with the communication device, a certain resource of the frequency converter is consumed, and therefore, only when the second preset condition is met, the fault data and the fault information are sent to the communication device, at this time, the fault data sending module 73 is specifically configured to:

the fault information sending module is specifically configured to:

Example five:

corresponding to the third embodiment, fig. 8 shows a schematic structural diagram of another fault data processing apparatus provided in the embodiment of the present application, where the fault data processing apparatus is applied to a communication device, and for convenience of description, only the parts related to the embodiment of the present application are shown:

the failure data processing device 8 includes: a fault data receiving module 81, a fault reason determining module 82 and a fault reason outputting module 83. Wherein:

the fault data receiving module 81 is configured to receive fault data sent by the frequency converter, where the fault data is used as fault data to be matched;

The fault cause determining module 82 is configured to determine a fault cause corresponding to the fault data to be matched according to the fault data to be matched and different standard fault data, where the standard fault data is the fault data corresponding to the fault cause;

and a fault reason output module 83 for outputting the fault reason.

In some embodiments, the frequency converter sends the corresponding fault data to be matched to the communication device only after receiving the fault data extraction instruction sent by the communication device, that is, the fault data processing apparatus 8 further includes:

and the fault data extraction instruction sending module is used for sending a fault data extraction instruction to the frequency converter.

In some embodiments, the failure data receiving module 81 is specifically configured to: and when the fault data uploading time point arrives, receiving the fault data to be matched sent by the frequency converter.

In some embodiments, in order to obtain a more accurate fault cause, the communication device further receives fault information to be matched from the frequency converter, that is, the fault data processing apparatus 8 further includes:

the fault information receiving module is used for receiving fault information sent by the frequency converter, and the fault information is used as fault information to be matched;

correspondingly, the fault cause determination module 82 is specifically configured to:

In this embodiment, the fault information corresponding to the frequency converter before various faults occur is obtained in advance, and the obtained fault information is used as standard information before the faults occur. Because the fault data to be matched and the fault information to be matched are different information, the communication equipment combines the fault data to be matched and the fault information to be matched to judge the fault reason corresponding to the fault data to be matched, and the accuracy of the obtained judgment result can be improved.

In some embodiments, in order to monitor the operation condition of the frequency converter, the fault data processing apparatus 8 further includes:

the first sampling data receiving module is used for receiving first sampling data sent by the frequency converter;

and the current running state analysis module is used for analyzing the current running state of the frequency converter according to the first sampling data.

In some embodiments, the frequency converter transmits the first sampled data to the communication device only when the communication device wishes to acquire the first sampled data. In this case, the failure data processing device 8 further includes:

and the operation data extraction instruction sending module is used for sending an operation data extraction instruction to the frequency converter.

In some embodiments, in order to allow the maintenance personnel to visually check the matching result, the fault cause determination module 82 includes:

the waveform reconstruction unit is used for carrying out waveform reconstruction on the fault data to be matched to obtain a fault waveform to be matched;

and the waveform comparison unit is used for comparing the fault waveform to be matched with the standard fault waveforms corresponding to different standard fault data and determining the fault reason corresponding to the fault data to be matched according to the comparison result.

In this embodiment, the variation trends of the two waveforms are compared, and if the variation trends of the two waveforms are consistent, it is determined that the two waveforms are matched waveforms, and then the fault cause corresponding to the matched standard fault waveform is used as the fault cause corresponding to the fault waveform to be matched. After the waveform is reconstructed, maintenance personnel can more directly check the variation trend of the fault data to be matched, so that the maintenance personnel can visually check the matching degree of the fault waveform to be matched and the standard fault waveform, and further the maintenance personnel can evaluate the accuracy degree of the obtained fault reason.

In some embodiments, because when a frequency converter fails due to different failure reasons, the failure data (or the failure data and the failure information) corresponding to the frequency converter may be similar in some aspects, so as to facilitate a maintenance worker to obtain more information, in the embodiment of the present application, when determining the failure reason corresponding to the failure data to be matched, the failure data processing apparatus 8 further includes:

the probability determining module is used for determining the probability that the frequency converter is a fault reason;

and the probability output module is used for outputting the probability of the fault reason.

In this embodiment, there may be a plurality of output fault causes, and when the fault cause is output, a probability that the fault cause causing the fault of the frequency converter is the output fault cause is also output.

It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/units, the specific functions and technical effects thereof are based on the same concept as those of the embodiment of the method of the present application, and specific reference may be made to the part of the embodiment of the method, which is not described herein again.

Example six:

fig. 9 is a schematic structural diagram of a frequency converter according to an embodiment of the present application. As shown in fig. 9, the frequency converter 9 of this embodiment includes: at least one processor 90 (only one processor is shown in fig. 9), a memory 91, and a computer program 92 stored in the memory 91 and executable on the at least one processor 90, the steps in any of the various method embodiments described above being implemented when the computer program 92 is executed by the processor 90.

The frequency converter 9 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The frequency converter may include, but is not limited to, a processor 90, a memory 91. Those skilled in the art will appreciate that fig. 9 is only an example of the frequency converter 9, and does not constitute a limitation to the frequency converter 9, and may include more or less components than those shown, or combine some components, or different components, such as an input/output device, a network access device, and the like.

The Processor 90 may be a Central Processing Unit (CPU), and the Processor 90 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 91 may in some embodiments be an internal storage unit of the frequency converter 9, such as a hard disk or a memory of the frequency converter 9. The memory 91 may also be an external storage device of the frequency converter 9 in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the frequency converter 9. Further, the memory 91 may also include both an internal storage unit of the frequency converter 9 and an external storage device. The memory 91 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of the computer program. The memory 91 may also be used to temporarily store data that has been output or is to be output.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

Example seven:

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in fig. 10, the communication device 10 of this embodiment includes: at least one processor 100 (only one processor is shown in fig. 10), a memory 101, and a computer program 102 stored in the memory 101 and executable on the at least one processor 100, the processor 100 implementing the steps in any of the various method embodiments described above when executing the computer program 102.

The communication device 10 may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The communication device may include, but is not limited to, a processor 100, a memory 101. Those skilled in the art will appreciate that fig. 10 is merely an example of the communication device 10 and does not constitute a limitation of the communication device 10 and may include more or less components than those shown, or some components may be combined, or different components may include, for example, input output devices, network access devices, etc.

The Processor 100 may be a Central Processing Unit (CPU), and the Processor 100 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 101 may in some embodiments be an internal storage unit of the communication device 10, such as a hard disk or a memory of the communication device 10. The memory 101 may also be an external storage device of the communication device 10 in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the communication device 10. Further, the memory 101 may also include both an internal storage unit and an external storage device of the communication device 10. The memory 101 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of the computer program. The memory 101 may also be used to temporarily store data that has been output or is to be output.

The embodiment of the present application includes an air conditioning apparatus, which includes the inverter of the sixth embodiment.

The embodiment of the present application further provides a storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps in the above method embodiments may be implemented.

The embodiment of the present application provides a computer program product, which when running on an air conditioning device, enables the air conditioning device to implement the steps in the above method embodiments when executed.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method of the embodiments described above can be implemented by a computer program, which can be stored in a storage medium and can implement the steps of the method embodiments described above when being executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to an air conditioning apparatus, a recording medium, computer Memory, Read-Only Memory (ROM), Random-Access Memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and patent practice.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/air conditioning device and method may be implemented in other ways. For example, the above-described device/air conditioner embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A fault data processing method is applied to a frequency converter, and comprises the following steps:

and sending the fault data to a communication device.

2. The fault data processing method according to claim 1, further comprising:

sampling the working parameters of the frequency converter to obtain corresponding second sampling data;

storing fault information of the frequency converter, wherein the fault information is second sampling data obtained when the frequency converter breaks down;

and sending the fault information to the communication equipment.

3. The fault data processing method according to claim 2,

the operating parameters of the electric machine include at least one of: motor current, bus voltage, motor speed and motor back electromotive force voltage;

the working parameters of the frequency converter comprise at least one of the following parameters: the time of occurrence of the fault, the power supply voltage, the rotating speed of the motor, the system exhaust pressure, the ambient temperature and the temperature of the intelligent power module; wherein the time of the fault occurrence is a difference between a time point of the fault occurrence and a time point of starting the motor.

4. A fault data processing method according to any of claims 1 to 3, characterized in that, after said obtaining corresponding first sample data, it comprises:

recording N1 data in the first sampling data to a random access memory of the frequency converter at intervals of a preset sampling period, wherein the N1 is determined according to the number of the random access memories of the frequency converter and the capacity of a single random access memory, and the N1 is a natural number larger than 9;

if the frequency converter fails, storing fault data of the frequency converter, including:

and if the frequency converter has a fault, storing fault data recorded in the random access memory into a storage device.

5. The fault data processing method according to claim 4, wherein the fault data processing method further comprises:

if a first preset condition is met, sending the recorded first sampling data to the communication equipment, wherein the first preset condition comprises that: and receiving an operation data extraction instruction or reaching an operation data uploading time point.

6. The fault data processing method according to claim 2 or 3, wherein said transmitting the fault data to a communication device comprises:

if a second preset condition is met, sending the stored fault data to the communication equipment, wherein the second preset condition comprises: receiving a fault data extraction instruction or the arrival of a fault data uploading time point;

the sending the fault information to the communication device includes:

7. A fault data processing method is applied to communication equipment and comprises the following steps:

and outputting the fault reason.

8. The fault data processing method according to claim 7, wherein the fault data processing method further comprises:

the determining the fault reason corresponding to the fault data to be matched according to the fault data to be matched and different standard fault data comprises the following steps:

and determining a fault reason corresponding to the fault data to be matched according to the fault data to be matched, the standard fault data, the fault information to be matched and standard pre-fault information, wherein the standard pre-fault information is fault information before a frequency converter fails.

9. The fault data processing method according to claim 7, wherein the fault data processing method further comprises:

receiving first sampling data sent by the frequency converter;

and analyzing the current running state of the frequency converter according to the first sampling data.

10. The method according to any one of claims 7 to 9, wherein the determining a fault cause corresponding to the fault data to be matched according to the fault data to be matched and different standard fault data includes:

carrying out waveform reconstruction on the fault data to be matched to obtain a fault waveform to be matched;

and comparing the fault waveform to be matched with the standard fault waveforms corresponding to different standard fault data, and determining the fault reason corresponding to the fault data to be matched according to the comparison result.

11. The fault data processing method according to any one of claims 7 to 9, wherein when determining the fault cause corresponding to the fault data to be matched, the method further includes:

determining the probability of the frequency converter being the fault reason;

when the outputting the failure cause, the method further includes:

and outputting the probability of the fault reason.

12. A fault data processing device is applied to a frequency converter and comprises:

13. A failure data processing apparatus, applied to a communication device, comprising:

and the fault reason output module is used for outputting the fault reason.

14. Frequency converter comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 6 when executing the computer program.

15. An air conditioning apparatus, characterized by comprising the inverter of claim 14.

16. A communication device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 7 to 11 when executing the computer program.

17. A storage medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the method according to any one of claims 1 to 11.