CN114415014A - Calibration test method and device for permanent magnet synchronous motor and computer equipment - Google Patents
Calibration test method and device for permanent magnet synchronous motor and computer equipment Download PDFInfo
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- CN114415014A CN114415014A CN202210024202.4A CN202210024202A CN114415014A CN 114415014 A CN114415014 A CN 114415014A CN 202210024202 A CN202210024202 A CN 202210024202A CN 114415014 A CN114415014 A CN 114415014A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The embodiment of the application provides a calibration test method of a permanent magnet synchronous motor, which comprises the following steps: obtaining a test meter, wherein the test meter comprises at least one calibration test point, and each calibration test point corresponds to the calibration rotating speed and the calibration current of the permanent magnet synchronous motor; aiming at each target calibration test point in the test meter, testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test point; and outputting the maximum motor torque corresponding to the target calibration test point and the target motor q-axis inductance corresponding to the maximum motor torque. The technical scheme provided by the application can accurately and rapidly calibrate and test the torque of the permanent magnet synchronous motor to a certain extent, can also reduce human intervention to the maximum extent, and finally improves the calibration and test efficiency.
Description
Technical Field
The invention belongs to the technical field of new energy automobile motor testing, and particularly relates to a calibration testing method and device of a permanent magnet synchronous motor and computer equipment.
Background
The permanent magnet synchronous motor has a special structure and characteristics, and when the permanent magnet synchronous motor is tested on a test bench and a test system, a designated working point in the whole rotating speed and torque operation range needs to be finely calibrated so as to test the optimal performance of the permanent magnet synchronous motor in the whole operation range. At present, when a permanent magnet synchronous motor is tested on a test bench and a system, different parameters are generally manually and repeatedly input by a tester to search the optimal parameters of each designated working point one by one. This is labor and time consuming and the test results are greatly affected by human factors.
Therefore, a calibration test method for a permanent magnet synchronous motor is urgently needed by those skilled in the art to accurately and quickly calibrate and test the torque of the permanent magnet synchronous motor, and also can reduce human intervention to the maximum extent and finally improve the calibration test efficiency
Disclosure of Invention
The embodiment of the application provides a calibration test method and device for a permanent magnet synchronous motor and computer equipment, so that the torque of the permanent magnet synchronous motor can be calibrated and tested accurately and quickly at least to a certain extent, human intervention can be reduced to the maximum extent, and finally the calibration test efficiency is improved.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned by practice of the application.
According to one aspect of the application, a calibration test method of a permanent magnet synchronous motor is provided, wherein the method comprises the following steps: obtaining a test meter, wherein the test meter comprises at least one calibration test point, and each calibration test point corresponds to the calibration rotating speed and the calibration current of the permanent magnet synchronous motor; aiming at each target calibration test point in the test meter, testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test point; and outputting the maximum motor torque corresponding to the target calibration test point and the target motor q-axis inductance corresponding to the maximum motor torque.
In some embodiments of the present application, the obtaining a test meter includes: acquiring a rotating speed interval and a current interval of the permanent magnet synchronous motor; selecting at least one calibration speed in the speed interval and at least one calibration current in the current interval; and constructing the test meter based on the at least one calibration rotating speed and the at least one calibration current.
In some embodiments of the present application, the testing, for each target calibration test point in the test table, the motor torques of the permanent magnet synchronous motor under different q-axis inductances of the motor based on the calibration rotational speeds and the calibration currents corresponding to the target calibration test points includes: determining the test sequence of each calibration test point in the test meter, wherein the calibration rotating speeds or the calibration currents of the adjacent calibration test points with the preset logarithm are the same; and sequentially determining target calibration test points in the test meter according to the test sequence of each calibration test point in the test meter, and testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test points.
In some embodiments of the present application, the testing the motor torques of the permanent magnet synchronous motor under different q-axis inductances of the motor based on the calibration rotational speed and the calibration current corresponding to the target calibration test point includes: obtaining rated d-axis inductance of the permanent magnet synchronous motor; and testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test point and the rated d-axis inductance.
In some embodiments of the present application, the obtaining a rated d-axis inductance of the permanent magnet synchronous motor includes: acquiring the short-circuit current of the permanent magnet synchronous motor, the back electromotive force of the permanent magnet synchronous motor at the rated rotating speed and the rated frequency of the permanent magnet synchronous motor; and calculating rated d-axis inductance of the permanent magnet synchronous motor based on the short-circuit current, the counter potential and the rated frequency.
In some embodiments of the present application, the testing the motor torques of the permanent magnet synchronous motor under different q-axis inductances of the motor based on the calibration rotational speed and the calibration current corresponding to the target calibration test point includes: acquiring a target motor q-axis inductance corresponding to a historical calibration test point adjacent to the target calibration test point as an initial motor q-axis inductance; determining at least one target motor q-axis inductance by taking the initial motor q-axis inductance as a reference and a preset inductance difference value as an interval; and testing the motor torque of the permanent magnet synchronous motor under the q-axis inductance of each target motor.
In some embodiments of the present application, before performing a calibration test, a winding temperature of the permanent magnet synchronous motor is obtained, and if the winding temperature is greater than or equal to a predetermined temperature, the permanent magnet synchronous motor is cooled until the winding temperature is less than the predetermined temperature, and then a current calibration test is performed.
According to an aspect of the present application, there is provided a calibration test apparatus of a permanent magnet synchronous motor, the apparatus including: the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a test meter, the test meter comprises at least one calibration test point, and each calibration test point corresponds to the calibration rotating speed and the calibration current of the permanent magnet synchronous motor; the test unit is used for testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test point for each target calibration test point in the test meter; and the output unit is used for outputting the maximum motor torque corresponding to the target calibration test point and the target motor q-axis inductance corresponding to the maximum motor torque.
According to an aspect of the present application, there is provided a computer-readable storage medium, wherein at least one program code is stored in the computer-readable storage medium, and the at least one program code is loaded into and executed by a processor to implement the operations performed by the calibration test method for a permanent magnet synchronous motor.
According to one aspect of the application, the computer apparatus comprises one or more processors and one or more memories having stored therein at least one program code, which is loaded and executed by the one or more processors to perform the operations performed by the calibration test method for a permanent magnet synchronous machine as described.
Based on the scheme, the application has at least the following advantages or progress effects:
according to the calibration test method of the permanent magnet synchronous motor, the target calibration test point on the test meter is calibrated according to the calibration rotating speed and the calibration current on the test meter by obtaining the test meter, so that the automatic and rapid calibration test of the permanent magnet synchronous motor can be realized, and the parameters do not need to be adjusted manually. In addition, for each target calibration test point, multiple motor torques are obtained by changing q-axis inductance, and finally, the maximum motor torque corresponding to the target calibration test point and the target motor q-axis inductance corresponding to the maximum motor torque are output, so that the permanent magnet synchronous motor is accurately calibrated.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 shows a simplified flow chart of a calibration test method of a permanent magnet synchronous machine in an embodiment of the present application;
FIG. 2 shows a simplified flow chart of a method for calibration testing of a permanent magnet synchronous machine in an embodiment of the present application;
FIG. 3 shows a simplified flowchart of a method for calibration testing of a permanent magnet synchronous machine in an embodiment of the present application;
FIG. 4 shows a simplified flowchart of a method for calibration testing of a permanent magnet synchronous machine in an embodiment of the present application;
FIG. 5 shows a simplified flowchart of a method for calibration testing of a permanent magnet synchronous machine in an embodiment of the present application;
FIG. 6 is a simplified diagram of a system architecture for a calibration test of a PMSM according to an embodiment of the present application;
FIG. 7 is a simplified diagram of a calibration test apparatus for a PMSM according to an embodiment of the present application;
FIG. 8 illustrates a schematic diagram of a computer system suitable for use in implementing embodiments of the present application.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
It is noted that the terms first, second and the like in the description and claims of the present 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 is to be understood that the objects so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or described herein.
Referring to fig. 1, fig. 1 shows a simplified flowchart of a calibration testing method for a permanent magnet synchronous motor in an embodiment of the present application, where the method may include steps S101 to S103:
step S101, a test meter is obtained, wherein the test meter comprises at least one calibration test point, and each calibration test point corresponds to the calibration rotating speed and the calibration current of the permanent magnet synchronous motor.
And S102, aiming at each target calibration test point in the test meter, testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test point.
And S103, outputting the maximum motor torque corresponding to the target calibration test point and the target motor q-axis inductance corresponding to the maximum motor torque.
In the application, a calibration current and a calibration rotating speed are set in the test meter, the motor torques of the permanent magnet synchronous motor under different q-axis inductances can be tested according to the calibration current and the calibration rotating speed in the test meter, the working parameter range of the permanent magnet synchronous motor can be accurately calibrated and tested, sufficient data support is provided for subsequent tests, and the performance of the permanent magnet synchronous motor can be evaluated according to calibration results.
Referring to fig. 2, fig. 2 shows a simplified flowchart of a calibration test method for a permanent magnet synchronous motor in an embodiment of the present application, where the method for obtaining a test table may include steps S201 to S203:
step S201, obtaining a rotating speed interval and a current interval of the permanent magnet synchronous motor.
Step S202, at least one calibration rotating speed is selected in the rotating speed interval, and at least one calibration current is selected in the current interval.
Step S203, constructing the test meter based on the at least one calibration rotating speed and the at least one calibration current.
In the present application, the calibration current and the calibration rotation speed of each target calibration test point are recorded in the test meter. In the rotation speed interval, a plurality of calibration rotation speeds can be divided according to a fixed interval, in the same way, a plurality of calibration currents can be divided according to a fixed interval in the current interval, and the calibration rotation speeds and the calibration currents can be combined one by one, so that the test meter is constructed and obtained. For example, within the speed interval, a plurality of calibration speeds may be divided according to a fixed interval: a. b, c, d, e; within the current interval, a plurality of calibration currents can be divided according to a fixed interval: A. b, C, D, E, 25 calibrated test points are thus available, and a test table can be obtained as shown in Table 1:
TABLE 1
In this embodiment, the method for testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotational speed and the calibration current corresponding to the target calibration test point may include: and determining the test sequence of each calibration test point in the test meter, wherein the calibration rotating speeds or the calibration currents of the adjacent calibration test points with the preset logarithm are the same. And sequentially determining target calibration test points in the test meter according to the test sequence of each calibration test point in the test meter, and testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test points.
In this application, the test table may set a test sequence of each calibration test point, and the test table may be as shown in table 2.
TABLE 2
As shown in table 2, the sequence of the calibration points in table 2 may be the test sequence of the calibration test points in this application, and it is easy to find that the calibration rotation speeds or the calibration currents of the adjacent calibration test points with the predetermined number of pairs are the same. For example, calibration points 1-15, the calibration speed is 1000rpm, the calibration current is 10A to 150A, and the interval is 10A. For another example, the calibration points 30 and 31 have the same calibration current and different calibration rotation speeds, so after the motor torque of the calibration point 30 is calibrated and tested, the motor torque of the calibration point 31 can be tested only by changing the calibration rotation speed, and the time for adjusting the calibration current is saved. Based on the scheme, the snake-shaped test sequence shown in the table 2 is adopted, so that the time for adjusting the calibration current and the calibration rotating speed is saved to a certain extent at least.
Referring to fig. 3, fig. 3 is a simplified flowchart illustrating a calibration testing method for a permanent magnet synchronous motor according to an embodiment of the present application. The method for testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test point can comprise the following steps of S301-S302:
and S301, obtaining the rated d-axis inductance of the permanent magnet synchronous motor.
Step S302, testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test point and the rated d-axis inductance.
Referring next to fig. 4, fig. 4 is a simplified flowchart illustrating a calibration testing method for a permanent magnet synchronous motor according to an embodiment of the present application, where the method for obtaining a rated d-axis inductance of the permanent magnet synchronous motor may include steps S401 to S402:
step S401, acquiring a short-circuit current of the permanent magnet synchronous motor, a counter electromotive force of the permanent magnet synchronous motor at a rated rotating speed and a rated frequency of the permanent magnet synchronous motor.
Step S402, calculating rated d-axis inductance of the permanent magnet synchronous motor based on the short-circuit current, the counter electromotive force and the rated frequency.
In the application, d-axis inductance and q-axis inductance of the motor are required to be set for calibrating and testing the motor torque of the permanent magnet synchronous motor. The d-axis inductance is a rated d-axis inductance of the permanent magnet synchronous motor and can be obtained by calculation according to the short-circuit current of the permanent magnet synchronous motor, the back electromotive force of the permanent magnet synchronous motor at a rated rotating speed and the rated frequency of the permanent magnet synchronous motor, and a calculation formula can be as follows:
wherein L isdI is the short circuit current, E is the back-emf, and f is the nominal frequency.
Referring to fig. 5, fig. 5 is a simplified flowchart illustrating a calibration testing method for a permanent magnet synchronous motor according to an embodiment of the present application, where the method for testing motor torques of the permanent magnet synchronous motor under different q-axis inductances of the motor based on a calibration rotational speed and a calibration current corresponding to the target calibration testing point may include steps S501 to S503:
step S501, a target motor q-axis inductance corresponding to a historical calibration test point adjacent to the target calibration test point is obtained and used as an initial motor q-axis inductance.
And step S502, determining at least one target motor q-axis inductance by taking the initial motor q-axis inductance as a reference and a preset inductance difference value as an interval.
And S503, testing the motor torque of the permanent magnet synchronous motor under the q-axis inductance of each target motor.
In the application, for a target calibration test point, a motor torque T10 corresponding to an initial motor q-axis inductance can be tested first; then, a preset inductance difference value is added on the basis of the initial motor q-axis inductance, the primary motor torque T11 is tested again, and the magnitude of the two motor torques is compared:
(1) if T11 is larger than T10, adding at least one preset inductance difference value on the basis of the initial motor q-axis inductance to obtain a plurality of target motor q-axis inductances, and testing motor torques corresponding to the target motor q-axis inductances;
(2) if T11 is smaller than T10, at least one preset inductance difference value is reduced on the basis of the initial motor q-axis inductance to obtain a plurality of target motor q-axis inductances, and motor torque corresponding to each target motor q-axis inductance is tested.
For example, for a target calibration test point, the initial motor q-axis inductance is a, the tested motor torque is b, and the preset inductance difference is c. When the q-axis inductance of the motor is a + c, the torque of the motor is d, and if d is larger than c, a plurality of target q-axis inductances of the motor can be obtained: a + c, a +2c, a +3c … …, a + nc, n is an integer greater than or equal to 0. Multiple motor torques may be tested based on multiple target motor q-axis inductances.
For example, for a target calibration test point, the initial motor q-axis inductance is a, the tested motor torque is b, and the preset inductance difference is c. When the q-axis inductance of the motor is a + c, the torque of the motor is d, and if d is less than c, a plurality of target q-axis inductances of the motor can be obtained: a-c, a-2c, a-3c … … and a-nc, wherein n is an integer greater than or equal to 0. Multiple motor torques may be tested based on multiple target motor q-axis inductances.
In addition, in the application, for one target calibration test point, the initial q-axis inductance can be determined according to the target motor q-axis inductance of the historical calibration test point. For example, in the existing two calibration test points a and B, a target q-axis inductance corresponding to the maximum motor torque of the calibration test point a is calibrated and tested as a, so that when the calibration test point B is calibrated and tested, a can be used as the initial q-axis inductance of the calibration test point B.
Based on the scheme, the motor torques can be accurately tested for each target calibration test point, the permanent magnet synchronous motor can be effectively calibrated and tested, the parameter set amount during the conversion of two adjacent calibration test points is reduced, and the calibration test efficiency can be effectively improved.
In some embodiments of the present application, before performing a calibration test, a winding temperature of the permanent magnet synchronous motor is obtained, and if the winding temperature is greater than or equal to a predetermined temperature, the permanent magnet synchronous motor is cooled until the winding temperature is less than the predetermined temperature, and then a current calibration test is performed.
Based on the scheme, the temperature of the winding of the permanent magnet synchronous motor can be controlled, the influence of irrelevant variables between each calibration test is reduced as much as possible, and the accuracy and the effectiveness of the calibration test process are improved.
Referring to fig. 6, fig. 6 is a schematic diagram illustrating a system architecture of the calibration test of the permanent magnet synchronous motor according to an embodiment of the present application.
In fig. 6, a main control unit 601 controls a measuring instrument 602, the measuring instrument 602 acquires torque data and rotation speed data of a motor 604 to be measured through a sensor 603, the main control unit 601 controls the movement of the motor 604 to be measured through a motor controller 605, the main control unit 601 controls a calibration current and a current of an accompanying motor 607 through a power control cabinet 606, and the accompanying motor 607 is used for assisting in controlling the rotation speed of the motor 604 to be measured.
Next, an apparatus embodiment of the present application will be described with reference to the drawings.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating a calibration testing apparatus of a permanent magnet synchronous motor according to an embodiment of the present application. The calibration test apparatus 700 may include: an acquisition unit 701, a test unit 702, and an output unit 703.
The specific configuration of the calibration testing device 700 may be as follows:
the obtaining unit 701 is configured to obtain a test meter, where the test meter includes at least one calibration test point, and each calibration test point corresponds to a calibration rotation speed and a calibration current of the permanent magnet synchronous motor.
The test unit 702 is configured to test, for each target calibration test point in the test table, the motor torques of the permanent magnet synchronous motor under different q-axis inductances of the motor based on the calibration rotational speed and the calibration current corresponding to the target calibration test point.
The output unit 703 is configured to output a maximum motor torque corresponding to the target calibration test point and a target motor q-axis inductance corresponding to the maximum motor torque.
Referring to FIG. 8, FIG. 8 illustrates a schematic diagram of a computer system suitable for implementing embodiments of the present application.
It should be noted that the computer system 800 shown in fig. 8 is only an example, and should not bring any limitation to the function and the scope of the application of the embodiments.
As shown in fig. 8, a computer system 800 includes a Central Processing Unit (CPU)801, which can perform various appropriate actions and processes, such as performing the methods described in the above embodiments, according to a program stored in a Read-Only Memory (ROM) 802 or a program loaded from a storage portion 808 into a Random Access Memory (RAM) 803. In the RAM 803, various programs and data necessary for system operation are also stored. The CPU 801, ROM 802, and RAM 803 are connected to each other via a bus 804. An Input/Output (I/O) interface 805 is also connected to bus 804.
The following components are connected to the I/O interface 805: an input portion 806 including a keyboard, a mouse, and the like; an output section 807 including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and a speaker; a storage section 808 including a hard disk and the like; and a communication section 809 including a Network interface card such as a LAN (Local Area Network) card, a modem, or the like. The communication section 809 performs communication processing via a network such as the internet. A drive 810 is also connected to the I/O interface 805 as necessary. A removable medium 811 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 810 as necessary, so that a computer program read out therefrom is mounted on the storage section 808 as necessary.
In particular, according to embodiments of the application, the processes described above with reference to the flow diagrams may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated by the flow chart. In such an embodiment, the computer program can be downloaded and installed from a network through the communication section 809 and/or installed from the removable medium 811. When the computer program is executed by the Central Processing Unit (CPU)801, various functions defined in the system of the present application are executed.
It should be noted that the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an Erasable Programmable Read-Only Memory (EPROM), a flash Memory, an optical fiber, a portable Compact Disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In this application, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units described in the embodiments of the present application may be implemented by software, or may be implemented by hardware, and the described units may also be disposed in a processor. Wherein the names of the elements do not in some way constitute a limitation on the elements themselves.
As another aspect, the present application also provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and executes the computer instructions, so that the computer device executes the calibration test method of the permanent magnet synchronous motor described in the above embodiments.
As another aspect, the present application also provides a computer-readable medium, which may be contained in the electronic device described in the above embodiments; or may exist separately without being assembled into the electronic device. The computer readable medium carries one or more programs, and when the one or more programs are executed by the electronic device, the electronic device is enabled to implement the calibration test method for the permanent magnet synchronous motor described in the above embodiments.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the embodiments of the present application.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A calibration test method of a permanent magnet synchronous motor is characterized by comprising the following steps:
obtaining a test meter, wherein the test meter comprises at least one calibration test point, and each calibration test point corresponds to the calibration rotating speed and the calibration current of the permanent magnet synchronous motor;
aiming at each target calibration test point in the test meter, testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test point;
and outputting the maximum motor torque corresponding to the target calibration test point and the target motor q-axis inductance corresponding to the maximum motor torque.
2. The method of claim 1, wherein obtaining the test meter comprises:
acquiring a rotating speed interval and a current interval of the permanent magnet synchronous motor;
selecting at least one calibration speed in the speed interval and at least one calibration current in the current interval;
and constructing the test meter based on the at least one calibration rotating speed and the at least one calibration current.
3. The method of claim 2, wherein the testing the motor torque of the PMSM at different motor q-axis inductances based on the calibration rotational speed and the calibration current corresponding to the target calibration test point for each target calibration test point in the test table comprises:
determining the test sequence of each calibration test point in the test meter, wherein the calibration rotating speeds or the calibration currents of the adjacent calibration test points with the preset logarithm are the same;
and sequentially determining target calibration test points in the test meter according to the test sequence of each calibration test point in the test meter, and testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test points.
4. The method of claim 1, wherein the testing the motor torque of the PMSM at different motor q-axis inductances based on the calibration rotational speed and the calibration current corresponding to the target calibration test point comprises:
obtaining rated d-axis inductance of the permanent magnet synchronous motor;
and testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test point and the rated d-axis inductance.
5. The method of claim 4, wherein said obtaining a rated d-axis inductance of the permanent magnet synchronous machine comprises:
acquiring the short-circuit current of the permanent magnet synchronous motor, the back electromotive force of the permanent magnet synchronous motor at the rated rotating speed and the rated frequency of the permanent magnet synchronous motor;
and calculating rated d-axis inductance of the permanent magnet synchronous motor based on the short-circuit current, the counter potential and the rated frequency.
6. The method of claim 1, wherein the testing the motor torque of the PMSM at different motor q-axis inductances based on the calibration rotational speed and the calibration current corresponding to the target calibration test point comprises:
acquiring a target motor q-axis inductance corresponding to a historical calibration test point adjacent to the target calibration test point as an initial motor q-axis inductance;
determining at least one target motor q-axis inductance by taking the initial motor q-axis inductance as a reference and a preset inductance difference value as an interval;
and testing the motor torque of the permanent magnet synchronous motor under the q-axis inductance of each target motor.
7. The method according to claim 6, wherein before a calibration test is performed, the winding temperature of the PMSM is obtained, and if the winding temperature is greater than or equal to a predetermined temperature, the PMSM is cooled until the winding temperature is less than the predetermined temperature and then the current calibration test is performed.
8. A calibration test device for a permanent magnet synchronous motor is characterized by comprising:
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a test meter, the test meter comprises at least one calibration test point, and each calibration test point corresponds to the calibration rotating speed and the calibration current of the permanent magnet synchronous motor;
the test unit is used for testing the motor torque of the permanent magnet synchronous motor under different motor q-axis inductances based on the calibration rotating speed and the calibration current corresponding to the target calibration test point for each target calibration test point in the test meter;
and the output unit is used for outputting the maximum motor torque corresponding to the target calibration test point and the target motor q-axis inductance corresponding to the maximum motor torque.
9. A computer-readable storage medium, having stored therein at least one program code, which is loaded and executed by a processor, to perform the operations performed by the method for calibration testing of a permanent magnet synchronous machine according to any of claims 1 to 7.
10. Computer apparatus, characterized in that it comprises one or more processors and one or more memories having stored therein at least one program code, which is loaded and executed by the one or more processors to carry out the operations executed by the method for calibration testing of a permanent magnet synchronous machine according to any of claims 1 to 7.
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