CN111175603B - Aging method and aging device of frequency converter, storage medium and processor - Google Patents
Aging method and aging device of frequency converter, storage medium and processor Download PDFInfo
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- CN111175603B CN111175603B CN202010011481.1A CN202010011481A CN111175603B CN 111175603 B CN111175603 B CN 111175603B CN 202010011481 A CN202010011481 A CN 202010011481A CN 111175603 B CN111175603 B CN 111175603B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
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Abstract
The application provides an aging method, an aging device, a storage medium and a processor of a frequency converter, wherein the aging method comprises the following steps: pre-configuring a virtual aging device, wherein the virtual aging device comprises a virtual motor; determining three-phase alternating-current voltage of the frequency converter according to parameters of the virtual motor, wherein the three-phase alternating-current voltage is alternating-current voltage with adjustable amplitude and adjustable frequency; control converter is with three-phase alternating voltage input virtual motor, with ageing converter, through setting up a virtual motor in advance, this virtual motor is virtual motor, the converter is according to virtual motor's parameter, output three-phase alternating voltage, and then drive virtual motor work, realize the ageing of converter, need not to insert actual motor class load, can realize the ageing of converter, and three-phase alternating voltage is the alternating voltage of adjustable amplitude and frequency, can satisfy the demand of the ageing equipment of different back level, the ageing step of converter has been simplified greatly, and the commonality is better.
Description
Technical Field
The application relates to the field of frequency converters, in particular to an aging method, an aging device, a storage medium and a processor of a frequency converter.
Background
In the prior art, the on-load aging scheme of the frequency converter is performed by using an actual load during aging, and the implementation mode is simple, but has the following disadvantages: the universality is very poor, and the aging equipment is complicated and the aging process is complicated due to different loads connected with different types of frequency conversion boards; the actual load is not easy to control, namely the aging power of the tested board is not controllable, and the consistency is poor; the traditional aging scheme generally occupies a large space and is easy to break down, so that the aging efficiency is influenced.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The present application mainly aims to provide an aging method, an aging apparatus, a storage medium, and a processor for a frequency converter, so as to solve the problem of poor versatility of an aging scheme of a frequency converter in the prior art.
In order to achieve the above object, according to an aspect of the present application, there is provided an aging method of a frequency converter, including: pre-configuring a virtual aging device, wherein the virtual aging device comprises a virtual motor; determining three-phase alternating-current voltage of the frequency converter according to the parameters of the virtual motor, wherein the three-phase alternating-current voltage is adjustable in amplitude and frequency; the frequency converter is controlled to input the three-phase alternating voltage into the virtual motor to age the frequency converter, a virtual motor is configured in advance, the virtual motor is a virtual motor, the frequency converter outputs the three-phase alternating voltage according to the parameters of the virtual motor to further drive the virtual motor to work, the aging of the frequency converter is realized, the actual motor load is not required to be accessed, the aging of the frequency converter can be realized, the three-phase alternating voltage is the alternating voltage with adjustable amplitude and frequency, the requirements of different rear-stage aging equipment can be met, the aging step of the frequency converter is greatly simplified, and the universality is better.
Further, a virtual aging apparatus is configured in advance, the virtual aging apparatus includes a virtual motor, and includes: the rotor of the virtual motor rotates by a preset angle difference, and the rotating speed of the rotor is determined according to the preset angle difference; determining an error in the rotational speed of the rotor based on the rotational speed of the rotor, where the predetermined angular difference is an angular velocity of the rotor of the virtual machine.
Further, the virtual motor having a rotor rotating at a predetermined angular difference, the rotational speed of the rotor being determined according to the predetermined angular difference, includes: and integrating the preset angle difference to determine the rotating speed of the rotor, wherein the preset angle difference is the angular speed of the rotor of the virtual motor, the angular speed is integrated to determine the rotating speed of the rotor, the virtual motor actually simulates a motor stator by three groups of LC (L refers to inductance, and C refers to capacitance) loads, the rotor of the virtual motor is actually not provided with the rotor, the rotor of the virtual motor is controlled to run, the virtual motor actually controls a virtual magnetic field which rotates in the inductance, the virtual rotor rotates along with the magnetic field, and the rotor of the virtual motor actually does not have an entity and is completely virtual.
Further, determining the three-phase alternating-current voltage of the frequency converter according to the parameters of the virtual motor comprises: determining a first component of voltage and a second component of voltage according to the error of the rotating speed of the rotor, wherein the first component is a d-axis component in a rotating coordinate system in a magnetic field orientation control algorithm, and the second component is a q-axis component in the rotating coordinate system in the magnetic field orientation control algorithm; determining six paths of PWM signals according to the first component of the voltage and the second component of the voltage; determining the three-phase alternating voltage according to the six-path PWM signals, determining the error of the rotating speed of the rotor according to the rotating speed of the rotor, further determining a d-axis component in a rotating coordinate system and a q-axis component in the rotating coordinate system in a magnetic field orientation control algorithm according to the error of the rotating speed, further obtaining the six-path PWM signals according to the magnetic field orientation control algorithm, further obtaining the three-phase alternating voltage, further butting the three-phase alternating voltage with the aging equipment, inputting the three-phase alternating voltage to a three-phase port of the aging equipment, and enabling the three-phase alternating voltage to be 50Hz alternating voltage with the phase difference of 120 degrees.
Further, determining a six-way PWM signal based on the first component of the voltage and the second component of the voltage includes: and determining the amplitude of the six-path PWM signal according to the magnitude of the second component of the voltage, namely determining the amplitude of the six-path PWM signal according to a q-axis component in a rotating coordinate system in a magnetic field orientation control algorithm.
Further, determining the three-phase ac voltage according to the six-phase PWM signal includes: and determining the amplitude of the three-phase alternating current voltage according to the amplitude of the six-path PWM signal, namely the amplitude of the six-path PWM signal corresponds to the amplitude of the three-phase alternating current voltage.
Further, the parameters of the virtual motor further include: the frequency of the virtual motor determines six PWM signals according to the first component of the voltage and the second component of the voltage, and the method further comprises the following steps: determining the frequency of the six-path PWM signal according to the frequency of the virtual motor, determining the three-phase alternating current voltage according to the six-path PWM signal, and further comprising: and determining the frequency of the three-phase alternating-current voltage according to the frequency of the six-path PWM signal, namely determining the frequency of the virtual motor to correspond to the frequency of the six-path PWM signal, determining the frequency of the three-phase alternating-current voltage according to the frequency of the virtual motor to correspond to the frequency of the three-phase alternating-current voltage, and finally determining the frequency of the three-phase alternating-current voltage according to the frequency of the virtual motor.
According to another aspect of the present application, there is provided an aging apparatus of a frequency converter, including: the device comprises a setting unit, a control unit and a processing unit, wherein the setting unit is used for configuring a virtual aging device in advance, and the virtual aging device comprises a virtual motor; the determining unit is used for determining the three-phase alternating-current voltage of the frequency converter according to the parameters of the virtual motor, wherein the three-phase alternating-current voltage is the alternating-current voltage with adjustable amplitude and adjustable frequency; the aging unit is used for controlling the frequency converter to input the three-phase alternating voltage into the virtual motor to age the frequency converter, a virtual motor is configured in advance through the configuration unit, the virtual motor is a virtual motor, the frequency converter outputs the three-phase alternating voltage according to the parameters of the virtual motor, the virtual motor is further driven to work, the aging of the frequency converter is realized, the actual motor load is not required to be connected, the aging of the frequency converter can be realized, the three-phase alternating voltage is the alternating voltage with adjustable amplitude and frequency, the requirements of different rear-stage aging equipment can be met, the aging step of the frequency converter is greatly simplified, and the universality is better.
According to still another aspect of the present application, there is provided a storage medium including a stored program, wherein the program executes any one of the aging methods.
According to still another aspect of the present application, there is provided a processor for executing a program, wherein the program executes any one of the aging methods.
Use the technical scheme of this application, through setting up a virtual motor in advance, this virtual motor is virtual motor, the converter is according to virtual motor's parameter, output three-phase alternating voltage, and then drive virtual motor work, realize the ageing of converter, need not to insert actual motor class load, can realize the ageing of converter, and three-phase alternating voltage is the alternating voltage of adjustable amplitude and frequency, can satisfy the demand of the ageing equipment of different back levels, the ageing step of converter has been simplified greatly, and the commonality is better.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 shows a flow diagram of an aging method according to an embodiment of the present application;
FIG. 2 shows a schematic diagram of an aging apparatus according to an embodiment of the present application; and
fig. 3 shows a circuit configuration diagram of a virtual motor according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
For convenience of description, some terms or expressions referred to in the embodiments of the present application are explained below:
field-oriented control (FOC): the method is a technology for controlling a three-phase alternating current motor by using a frequency converter, the output of the motor is controlled by adjusting the output frequency of the frequency converter and the magnitude and angle of output voltage, the voltage of three-phase PWM is generated according to a current vector calculated in a formula and is supplied to the motor, the purpose is to control the three-phase current of the motor, and physical quantities such as the current, the voltage and the like can be converted between two systems, one is a three-phase system which changes along with the speed and the time, and the other is a two-axis non-linear variable rotating coordinate system.
As described in the background art, in the prior art, an aging scheme of a frequency converter with load may use an actual load for aging, the frequency converter aging scheme has a poor versatility, and in order to solve the problem of the poor versatility of the aging scheme of the frequency converter, an exemplary embodiment of the present application provides an aging method of a frequency converter.
Fig. 1 is a flow chart of an aging method of a frequency converter according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:
step S101, a virtual aging device is configured in advance, and the virtual aging device comprises a virtual motor;
step S102, determining three-phase alternating-current voltage of a frequency converter according to the parameters of the virtual motor, wherein the three-phase alternating-current voltage is alternating-current voltage with adjustable amplitude and adjustable frequency;
step S103, controlling the inverter to input the three-phase ac voltage to the virtual motor to age the inverter.
In the scheme, a virtual motor is configured in advance, the virtual motor is a virtual motor, the frequency converter outputs three-phase alternating-current voltage according to the parameters of the virtual motor, the virtual motor is driven to work, the aging of the frequency converter is realized, the actual motor load does not need to be connected, the aging of the frequency converter can be realized, the three-phase alternating-current voltage is the alternating-current voltage with adjustable amplitude and frequency, the requirements of different rear-stage aging equipment can be met, the aging step of the frequency converter is greatly simplified, and the universality is better.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
In an embodiment of the present application, a virtual aging apparatus is configured in advance, where the virtual aging apparatus includes a virtual motor, and includes: the rotor of the virtual motor rotates by a preset angle difference, and the rotating speed of the rotor is determined according to the preset angle difference; and determining the error of the rotating speed of the rotor according to the rotating speed of the rotor, wherein the preset angle difference is the angular speed of the rotor of the virtual motor.
In an embodiment of the present application, the determining a rotation speed of the rotor according to a predetermined angle difference between the rotor of the virtual motor and the rotor of the virtual motor includes: specifically, as shown in fig. 3, the virtual motor is actually a motor stator simulated by three groups of LC (L refers to inductance, C refers to capacitance) loads, the three groups of LCs are respectively connected to U, V, W three paths of signals, there is no rotor actually, the rotor of the virtual motor is controlled to operate, that is, a rotating virtual magnetic field is generated in the control inductance actually, the virtual rotor rotates along with the magnetic field, and the rotor of the virtual motor actually has no entity and is completely virtual.
According to an embodiment of the present application, determining the three-phase ac voltage of the frequency converter according to the parameter of the virtual motor includes: determining a first component of a voltage and a second component of the voltage according to the error of the rotating speed of the rotor, wherein the first component is a d-axis component in a rotating coordinate system in a magnetic field orientation control algorithm, and the second component is a q-axis component in the rotating coordinate system in the magnetic field orientation control algorithm; determining six paths of PWM signals according to the first component of the voltage and the second component of the voltage; the three-phase alternating voltage is determined according to the six-phase PWM signals, the error of the rotating speed of the rotor is determined according to the rotating speed of the rotor, the d-axis component in a rotating coordinate system and the q-axis component in the rotating coordinate system in a magnetic field orientation control algorithm are further determined according to the error of the rotating speed, the six-phase PWM signals are obtained according to the magnetic field orientation control algorithm, the three-phase alternating voltage is further obtained, the three-phase alternating voltage is in butt joint with the aging equipment, the three-phase alternating voltage is input to a three-phase port of the aging equipment, and the three-phase alternating voltage is 50Hz alternating voltage with the phase difference of 120 degrees.
In one embodiment of the present application, determining six PWM signals according to the first component of the voltage and the second component of the voltage includes: and determining the amplitude of the six-path PWM signal according to the magnitude of the second component of the voltage, namely determining the amplitude of the six-path PWM signal according to a q-axis component in a rotating coordinate system in the magnetic field orientation control algorithm.
In an embodiment of the present application, determining the three-phase ac voltage according to the six PWM signals includes: and determining the amplitude of the three-phase alternating-current voltage according to the amplitude of the six-path PWM signal, namely the amplitude of the six-path PWM signal corresponds to the amplitude of the three-phase alternating-current voltage.
In an embodiment of the present application, the parameters of the virtual motor further include: the frequency of the virtual motor determines six PWM signals according to the first component of the voltage and the second component of the voltage, and further includes: determining the frequency of the six-way PWM signal according to the frequency of the virtual motor, and determining the three-phase ac voltage according to the six-way PWM signal, further comprising: and determining the frequency of the three-phase alternating-current voltage according to the frequency of the six-path PWM signal, namely, the frequency of the virtual motor corresponds to the frequency of the six-path PWM signal, the frequency of the six-path PWM signal corresponds to the frequency of the three-phase alternating-current voltage, and finally determining the frequency of the three-phase alternating-current voltage according to the frequency of the virtual motor.
The embodiment of the present application further provides an aging apparatus for a frequency converter, and it should be noted that the aging apparatus for a frequency converter in the embodiment of the present application may be used to execute the aging method for a frequency converter provided in the embodiment of the present application. The following describes an aging apparatus of a frequency converter provided in an embodiment of the present application.
Fig. 2 is a schematic diagram of an aging apparatus of a frequency converter according to an embodiment of the present application. As shown in fig. 2, the apparatus includes:
a configuration unit 10, configured to pre-configure a virtual aging device, where the virtual aging device includes a virtual motor;
a determining unit 20, configured to determine a three-phase ac voltage of the frequency converter according to the parameter of the virtual motor, where the three-phase ac voltage is an ac voltage with an adjustable amplitude and an adjustable frequency;
and an aging unit 30 for controlling the inverter to input the three-phase ac voltage to the virtual motor to age the inverter.
In the scheme, a virtual motor is configured in advance through the configuration unit, the virtual motor is a virtual motor, the frequency converter outputs three-phase alternating-current voltage according to the parameters of the virtual motor, the virtual motor is driven to work, the aging of the frequency converter is realized, the actual motor load is not required to be connected, the aging of the frequency converter can be realized, the three-phase alternating-current voltage is the alternating-current voltage with adjustable amplitude and frequency, the requirements of different rear-stage aging equipment can be met, the aging step of the frequency converter is greatly simplified, and the universality is better.
In an embodiment of the present application, the configuration unit includes a first determination module and a second determination module, the first determination module is configured to determine a rotation speed of the rotor according to a predetermined angle difference when the rotor of the virtual motor rotates by the predetermined angle difference; the second determining module is used for determining the error of the rotating speed of the rotor according to the rotating speed of the rotor, wherein the preset angle difference is the angular speed of the rotor of the virtual motor.
In an embodiment of the application, the first determining module is further configured to determine a rotation speed of the rotor by integrating the predetermined angular difference, where the predetermined angular difference is an angular speed of the rotor of the virtual motor, and the angular speed is integrated to determine the rotation speed of the rotor.
In one embodiment of the present application, the determining unit includes a third determining module, a fourth determining module, and a fifth determining module. The third determining module is used for determining a first component of voltage and a second component of the voltage according to the error of the rotating speed of the rotor, wherein the first component is a d-axis component in a rotating coordinate system in a magnetic field orientation control algorithm, and the second component is a q-axis component in the rotating coordinate system in the magnetic field orientation control algorithm; the fourth determining module is used for determining six paths of PWM signals according to the first component of the voltage and the second component of the voltage; the fifth determining module is used for determining the three-phase alternating-current voltage according to the six-path PWM signals, determining an error of the rotating speed of the rotor according to the rotating speed of the rotor, further determining a d-axis component in a rotating coordinate system and a q-axis component in the rotating coordinate system in a magnetic field orientation control algorithm according to the error of the rotating speed, further obtaining the six-path PWM signals according to the magnetic field orientation control algorithm, further obtaining the three-phase alternating-current voltage, further butting the three-phase alternating-current voltage with the aging equipment, inputting the three-phase alternating-current voltage to a three-phase port of the aging equipment, and enabling the three-phase alternating-current voltage to be 50Hz alternating-current voltage with the phase difference of 120 degrees.
In an embodiment of the present application, the fourth determining module is further configured to determine the amplitudes of the six PWM signals according to magnitudes of the second components of the voltages, that is, according to q-axis components in a rotating coordinate system in a magnetic field orientation control algorithm.
In an embodiment of the application, the fifth determining module is further configured to determine the amplitude of the three-phase ac voltage according to the amplitude of the six-way PWM signal, that is, the amplitude of the six-way PWM signal corresponds to the amplitude of the three-phase ac voltage.
In an embodiment of the present application, the parameters of the virtual motor further include: the frequency of the virtual motor, the fourth determining module is further configured to determine the frequency of the six-way PWM signal according to the frequency of the virtual motor, the fifth determining module is further configured to determine the frequency of the three-phase alternating-current voltage according to the frequency of the six-way PWM signal, that is, the frequency of the virtual motor corresponds to the frequency of the six-way PWM signal, the frequency of the six-way PWM signal corresponds to the frequency of the three-phase alternating-current voltage, and the frequency of the three-phase alternating-current voltage can be finally determined according to the frequency of the virtual motor.
The aging device of the frequency converter comprises a processor and a memory, wherein the configuration unit, the determination unit, the aging unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more than one core can be set, and the universality of the existing frequency converter aging scheme is improved by adjusting the core parameters.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a storage medium, on which a program is stored, and the program implements the aging method of the frequency converter when executed by a processor.
The embodiment of the invention provides a processor, which is used for running a program, wherein the aging method of the frequency converter is executed when the program runs.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein when the processor executes the program, at least the following steps are realized:
step S101, a virtual aging device is configured in advance, and the virtual aging device comprises a virtual motor;
step S102, determining three-phase alternating-current voltage of a frequency converter according to the parameters of the virtual motor, wherein the three-phase alternating-current voltage is alternating-current voltage with adjustable amplitude and adjustable frequency;
step S103, controlling the inverter to input the three-phase ac voltage to the virtual motor to age the inverter.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform a program of initializing at least the following method steps when executed on a data processing device:
step S101, a virtual aging device is configured in advance, and the virtual aging device comprises a virtual motor;
step S102, determining three-phase alternating-current voltage of a frequency converter according to the parameters of the virtual motor, wherein the three-phase alternating-current voltage is alternating-current voltage with adjustable amplitude and adjustable frequency;
step S103, controlling the inverter to input the three-phase ac voltage to the virtual motor to age the inverter.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
Examples
The embodiment relates to an aging system of a driving plate of an air conditioner outdoor unit, which comprises a virtual motor and a frequency converter, wherein three-phase alternating-current voltage of the frequency converter is determined according to parameters of the virtual motor, and the three-phase alternating-current voltage is alternating-current voltage with adjustable amplitude and adjustable frequency; the frequency converter inputs three-phase alternating voltage into a virtual motor, so that the frequency converter of an air conditioner outdoor unit driving board is aged, single speed loop work is realized by using a software algorithm, the speed loop control is half-open loop control, the frequency and amplitude of the output alternating voltage are set, the three-phase voltage with the size of 130V is set, the voltage frequency is 50Hz, and the driving units such as an IPM module and the like are excited; the current sampling circuit is mainly used for collecting three-phase current and is used for algorithm control; the overcurrent protection circuit is mainly used for realizing the overcurrent protection function of the module under special conditions. The output of the driving unit is U, V, W three-phase alternating current, the phase difference is 120 degrees, the amplitude is 130V, the alternating current is input to the aging simulation load, the aging load can automatically capture the three-phase alternating current and apply a certain load, and therefore the aging load is achieved.
This scheme breaks away from traditional electric current loop control, directly gives the target voltage amplitude, simplifies control circuit, and output voltage amplitude is not influenced by back level load, and traditional open loop control is direct control output current, can't guarantee output voltage amplitude's stability, is unfavorable for back level ageing equipment to follow, and then reaches the voltage amplitude of the three-phase electricity of output controllable.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) the aging method of the frequency converter outputs three-phase alternating current voltage according to the parameters of the virtual motor, so that the virtual motor is driven to work, the aging of the frequency converter is realized, the actual motor load is not required to be connected, the aging of the frequency converter can be realized, the three-phase alternating current voltage is the alternating current voltage with adjustable amplitude and frequency, the requirements of different rear-stage aging equipment can be met, the aging step of the frequency converter is greatly simplified, and the universality is better.
2) The utility model provides an ageing device of converter, through configuration unit virtual motor of pre-configuration, this virtual motor is virtual motor, the converter is according to virtual motor's parameter, output three-phase alternating voltage, and then drive virtual motor work, realize the ageing of converter, need not to insert actual motor class load, can realize the ageing of converter, and three-phase alternating voltage is the alternating voltage of adjustable amplitude and frequency, can satisfy the demand of the ageing equipment of different back levels, the ageing step of converter has been simplified greatly, and the commonality is better.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. An aging method of a frequency converter is characterized by comprising the following steps:
pre-configuring a virtual aging device, wherein the virtual aging device comprises a virtual motor;
determining three-phase alternating-current voltage of the frequency converter according to the parameters of the virtual motor, wherein the three-phase alternating-current voltage is adjustable in amplitude and frequency;
controlling the frequency converter to input the three-phase alternating voltage into the virtual motor so as to age the frequency converter;
the pre-configuring a virtual aging device, the virtual aging device including a virtual motor, includes: the rotor of the virtual motor rotates by a preset angle difference, and the rotating speed of the rotor is determined according to the preset angle difference; determining an error of the rotation speed of the rotor according to the rotation speed of the rotor;
determining the three-phase alternating current voltage of the frequency converter according to the parameters of the virtual motor, and the method comprises the following steps: determining a first component of voltage and a second component of voltage according to the error of the rotating speed of the rotor, wherein the first component is a d-axis component in a rotating coordinate system in a magnetic field orientation control algorithm, and the second component is a q-axis component in the rotating coordinate system in the magnetic field orientation control algorithm; determining six paths of PWM signals according to the first component of the voltage and the second component of the voltage; and determining the three-phase alternating current voltage according to the six paths of PWM signals.
2. The aging method according to claim 1, wherein the rotor of the virtual machine rotates at a predetermined angular difference, and the determining the rotational speed of the rotor based on the predetermined angular difference comprises:
integrating the predetermined angular difference determines the rotational speed of the rotor.
3. The aging method of claim 1, wherein determining a six-way PWM signal based on the first component of the voltage and the second component of the voltage comprises:
and determining the amplitude of the six paths of PWM signals according to the magnitude of the second component of the voltage.
4. The aging method of claim 3, wherein determining the three-phase alternating current voltage from the six-phase PWM signal comprises:
and determining the amplitude of the three-phase alternating current voltage according to the amplitude of the six-path PWM signal.
5. The aging method of claim 1, wherein the parameters of the virtual machine further comprise: the frequency of the virtual motor is such that,
determining a six-way PWM signal according to the first component of the voltage and the second component of the voltage, further comprising:
determining the frequency of the six-path PWM signal according to the frequency of the virtual motor,
determining the three-phase alternating current voltage according to the six-path PWM signal, further comprising:
and determining the frequency of the three-phase alternating current voltage according to the frequency of the six-path PWM signal.
6. An aging apparatus of a frequency converter, comprising:
the device comprises a setting unit, a control unit and a processing unit, wherein the setting unit is used for configuring a virtual aging device in advance, and the virtual aging device comprises a virtual motor;
the determining unit is used for determining the three-phase alternating-current voltage of the frequency converter according to the parameters of the virtual motor, wherein the three-phase alternating-current voltage is the alternating-current voltage with adjustable amplitude and adjustable frequency;
the aging unit is used for controlling the frequency converter to input the three-phase alternating voltage into the virtual motor so as to age the frequency converter;
the setting unit comprises a first determining module and a second determining module, wherein the first determining module is used for enabling a rotor of the virtual motor to rotate at a preset angle difference and determining the rotating speed of the rotor according to the preset angle difference; the second determination module is used for determining the error of the rotating speed of the rotor according to the rotating speed of the rotor;
the determining unit comprises a third determining module, a fourth determining module and a fifth determining module, wherein the third determining module is used for determining a first component of voltage and a second component of the voltage according to the error of the rotating speed of the rotor, the first component is a d-axis component in a rotating coordinate system in a magnetic field orientation control algorithm, and the second component is a q-axis component in the rotating coordinate system in the magnetic field orientation control algorithm; the fourth determining module is used for determining six paths of PWM signals according to the first component of the voltage and the second component of the voltage; the fifth determining module is used for determining the three-phase alternating current voltage according to the six-path PWM signals.
7. A storage medium, characterized in that the storage medium includes a stored program, wherein the program executes the aging method of any one of claims 1 to 5.
8. A processor, configured to run a program, wherein the program is configured to execute the aging method according to any one of claims 1 to 5 when the program is run.
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