CN112421995B - Motor efficient operation control method and device, electronic equipment and storage medium - Google Patents
Motor efficient operation control method and device, electronic equipment and storage medium Download PDFInfo
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- CN112421995B CN112421995B CN202011192820.7A CN202011192820A CN112421995B CN 112421995 B CN112421995 B CN 112421995B CN 202011192820 A CN202011192820 A CN 202011192820A CN 112421995 B CN112421995 B CN 112421995B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/06—Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
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Abstract
The invention relates to a motor high-efficiency operation control method, a device, electronic equipment and a storage medium, comprising the following steps: s1, obtaining and segmenting the rotating speed of the motor by taking the rated rotating speed of the motor as a reference so as to obtain a plurality of rotating speed segments; s2, acquiring a plurality of rotating speed values from the rotating speed section, and acquiring a plurality of corresponding switch angles; s3, fitting the switch angle in the rotating speed section to obtain a corresponding initial switch angle fitting curve, and operating the motor according to the initial switch angle fitting curve to obtain a corresponding power measuring curve; s4, judging whether a non-optimal rotating speed point is contained in the rotating speed section or not according to the power measuring curve, if so, acquiring and updating the switch angles corresponding to the non-optimal rotating speed value to obtain a plurality of updated switch angles corresponding to the rotating speed section, executing S3, and if not, taking the initial switch angle fitting curve as a final switch angle fitting curve corresponding to the rotating speed section; and S2 and the following steps are respectively executed for all the rotation speed sections to obtain a plurality of corresponding final switch angle fitting curves. The invention can effectively ensure the high-efficiency operation of the motor.
Description
Technical Field
The present invention relates to the field of motor technologies, and in particular, to a method and an apparatus for controlling efficient operation of a motor, an electronic device, and a storage medium.
Background
The switched reluctance motor is a speed regulating motor, which is used as the latest generation speed regulating system of a secondary frequency conversion speed regulating system and a brushless direct current motor speed regulating system, has the characteristics of simple and firm structure, wide speed regulating range, high system reliability and the like, and the complete system mainly comprises a motor entity, a power converter, a controller, a position detector and the like. The controller contains a power converter and control circuitry, and a rotor position detector is mounted at one end of the motor. Nowadays, the application and development of the switched reluctance motor have made remarkable progress, and the switched reluctance motor has been successfully applied to various fields such as electric vehicle driving, general industry, household appliances and textile machinery, and the like, the power range is from 10W to 5MW, and the maximum speed is as high as 100,000 r/min. As a nonlinear motor, how to improve the operating efficiency of a switched reluctance motor is a problem to be overcome in application.
Disclosure of Invention
The present invention provides a method, an apparatus, an electronic device and a storage medium for controlling efficient operation of a motor, which are directed to some technical defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for controlling the efficient operation of a motor is constructed, and comprises the following steps:
s1, obtaining the rated rotating speed of the motor, and segmenting the rotating speed of the motor by taking the rated rotating speed as a reference to obtain a plurality of rotating speed segments;
s2, obtaining a plurality of rotating speed values according to preset intervals for the rotating speed section, and obtaining a plurality of switch angles corresponding to the rotating speed values respectively, wherein the switch angles comprise turn-on angles and turn-off angles;
s3, fitting the switch angles in the rotating speed section to obtain an initial switch angle fitting curve corresponding to the rotating speed section, and operating the motor according to the initial switch angle fitting curve to obtain a power measuring curve corresponding to the rotating speed section;
s4, judging whether the rotating speed section contains a non-optimal rotating speed point or not according to the power measuring curve, if so, executing a step S5, and if not, executing a step S6;
s5, obtaining and updating the switch angles corresponding to the non-optimal rotating speed value to obtain a plurality of updated switch angles corresponding to the rotating speed section, and executing the step S3;
s6, taking the initial switching angle fitting curve as a final switching angle fitting curve corresponding to the rotating speed section;
s7, executing the steps S2 to S6 to all the rotating speed sections respectively to obtain a plurality of final switch angle fitting curves corresponding to the rotating speed sections respectively.
Preferably, in the step S3, the fitting the switching angles in the rotation speed segment includes: fitting the plurality of switching angles with a second order function.
Preferably, in the step S1, the segmenting the operation speed of the motor based on the rated rotation speed to obtain a plurality of rotation speed segments includes:
segmenting the rotating speed of the motor according to three grades of low speed, medium speed and high speed to obtain three rotating speed segments; the range of the rotating speed section corresponding to the low-speed grade is less than 200RPM, the range of the rotating speed section corresponding to the medium-speed grade is from 200RPM to the rated rotating speed, and the range of the rotating speed section corresponding to the high-speed grade is greater than the rated rotating speed.
Preferably, the method for controlling the efficient operation of the motor further comprises the following steps:
when the motor rotating speed is in the high-speed grade, controlling the motor rotating speed in an angle position control mode according to the final switch angle fitting curve;
when the rotating speed of the motor is in the medium-speed grade, controlling the rotating speed of the motor in a variable-angle chopping control mode according to the final switch angle fitting curve;
and when the rotating speed of the motor is in the low-speed grade, controlling the rotating speed of the motor in a fixed-angle chopping control mode according to the final switch angle fitting curve.
Preferably, in the step S2, the obtaining, according to the rotation speed values, a plurality of switching angles corresponding to the plurality of rotation speed values respectively includes:
and fixing the torque of the rotating speed value, and acquiring a switch angle corresponding to the minimum input current value of the motor as the switch angle corresponding to the rotating speed value.
Preferably, the method for controlling the efficient operation of the motor further comprises the following steps:
and S71, pre-storing the final switching angle fitting curves, and acquiring the final switching angle fitting curves according to a preset period to control the motor.
The invention also constructs a motor high-efficiency operation control device, which comprises:
the first execution unit is used for acquiring the rated operation rotating speed of the motor and segmenting the rotating speed of the motor by taking the rated operation rotating speed as a reference so as to obtain a plurality of rotating speed segments;
the second execution unit is used for acquiring a plurality of rotating speed values of the rotating speed section according to preset intervals and acquiring a plurality of switching angles respectively corresponding to the plurality of rotating speed values, wherein the switching angles comprise turn-on angles and turn-off angles;
the third execution unit is used for fitting the plurality of switching angles in the rotating speed section to obtain an initial switching angle fitting curve corresponding to the rotating speed section;
the fourth execution unit is used for operating the motor according to the initial switch angle fitting curve to obtain a corresponding power measuring curve;
the judging unit is used for judging whether the rotating speed section contains a non-optimal rotating speed point or not according to the power measuring curve;
a fifth execution unit, configured to, when the determination result of the determination unit is affirmative, obtain and update the switching angles corresponding to the non-optimal rotation speed value to obtain a plurality of updated switching angles corresponding to the rotation speed segments, and drive the third execution unit to operate;
a sixth executing unit, configured to, when the determination result of the determining unit is negative, use the initial switching angle fitting curve as a final switching angle fitting curve corresponding to the rotation speed segment;
after the sixth execution unit executes the operation, the second execution unit, the third execution unit, the fourth execution unit, the fifth execution unit and the sixth execution unit respectively act on all the rotation speed sections to obtain a plurality of final switch angle fitting curves corresponding to the rotation speed sections respectively.
Preferably, the first and second electrodes are formed of a metal,
the third execution unit comprises a second-order fitting unit, and the second-order fitting unit is used for fitting the plurality of switching angles by a second-order function.
The invention also constitutes a computer storage medium having stored thereon a computer program which, when executed by a processor, implements a motor efficient operation control method as described in any one of the above.
The invention also features an electronic device including a memory and a processor; the memory is used for storing a computer program;
the processor is used for executing the computer program to realize the motor efficient operation control method according to any one of the above items.
The implementation of the motor efficient operation control method, the device, the electronic equipment and the storage medium has the following beneficial effects: can effectively ensure the high-efficiency operation of the motor.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flowchart illustrating the procedure of an embodiment of the method for controlling the efficient operation of a motor according to the present invention;
FIG. 2 is a flowchart of the process of another embodiment of the method for controlling the efficient operation of the motor according to the present invention;
fig. 3 is a logic block diagram of an embodiment of the motor efficient operation control device of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of the motor efficient operation control method of the present invention, the method includes the steps of: s1, obtaining the rated rotating speed of the motor, and segmenting the rotating speed of the motor by taking the rated rotating speed as a reference to obtain a plurality of rotating speed segments; specifically, the rated rotation speed of the motor is usually set in advance according to the design of the motor, and after the rated rotation speed is obtained, the rotation speed of the motor is segmented, wherein the segmentation is based on the rated rotation speed, and can also be understood as setting the rotation speed meeting the same standard as the same rotation speed segment by taking the rated rotation speed as a reference, and a plurality of different rotation speed segments can be obtained by using a plurality of different standards.
S2, obtaining a plurality of rotating speed values according to preset intervals for the rotating speed section, and obtaining a plurality of switch angles corresponding to the rotating speed values respectively, wherein the switch angles comprise turn-on angles and turn-off angles; specifically, regular or irregular intervals are carried out on each rotating speed section to obtain a rotating speed value, and a corresponding switch angle is obtained based on the rotating speed value, wherein the switch angle comprises a switch-on angle and a switch-off angle when the motor runs, the switch angle can be specifically selected according to the rule that the smaller the inductance is, the faster the current rises, the minimum value of the sampled input current of the motor is made by changing the switch angle under the same rotating speed and the same torque, and the switch angle can be selected according to the rule that the smaller the inductance is, the faster the current rises in the rising interval of the inductance. The preset interval of the rotating speed can be selected to be different values according to different rotating speed sections, for example, the time interval of the high-speed section can be selected to be 100RPM, the time interval of the medium-speed section can be selected to be 10RPM, the time interval of the low-speed section can be selected to be 5RPM, and the preset interval of the rotating speed is basically selected according to the rule that the interval of the high-speed section is larger than that of the low-speed section. The smaller the preset interval, the more accurate the initial switching angle curve, but the more the workload to be completed.
S3, fitting the switch angles in the rotating speed section to obtain an initial switch angle fitting curve corresponding to the rotating speed section, and operating the motor according to the initial switch angle fitting curve to obtain a power measuring curve corresponding to the rotating speed section; specifically, fitting is performed on a plurality of switch angles acquired in each rotating speed section, and an initial switch angle fitting curve of the rotating speed section is obtained through fitting. And fitting a curve to operate the motor according to the initial switch angle obtained by fitting, and obtaining a power measuring curve in the loading operation process of the motor after the motor is loaded on the power measuring machine, so as to obtain the power measuring curve corresponding to the rotating speed section. The dynamometer curve is a curve of parameters such as input power, output power and efficiency which change along with load torque in the loading operation process of the motor.
S4, judging whether the rotating speed section contains a non-optimal rotating speed point or not according to the power measuring curve, if so, executing a step S5, and if not, executing a step S6;
s5, obtaining and updating the switch angles corresponding to the non-optimal rotating speed value to obtain a plurality of switch angles corresponding to the updated rotating speed section, and executing the step S3; specifically, the dynamometer curve of each rotation speed segment is respectively judged to determine whether non-optimal rotation speed points are contained, wherein the non-optimal rotation speed points can be understood as points with poor motor efficiency in the dynamometer curve, which can realize the set judgment standard, but the corresponding motor efficiency does not meet the judgment standard, and then the rotation speed points corresponding to the efficiency can be judged to be the non-optimal rotation speed points. And optimizing the switch angle corresponding to the non-optimal rotating speed point, wherein the optimization can adopt proper deviation, and then obtaining the updated switch angle corresponding to the rotating speed section. And after the updated switching angle is obtained, fitting the switching angle of the rotating speed section again to obtain a corresponding initial switching angle fitting curve, and judging the efficiency of the rotating speed point again until no non-optimal rotating speed point exists in the rotating speed section.
S6, taking the initial switching angle fitting curve as a final switching angle fitting curve corresponding to the rotating speed section; specifically, once the non-optimal rotation speed point is not included in the rotation speed section, the initial switching angle fitting curve can be used as the final switching angle fitting curve of the rotation speed section.
S7, executing the steps S2 to S6 to all the rotating speed sections respectively to obtain a plurality of final switch angle fitting curves corresponding to the rotating speed sections respectively. And obtaining corresponding final switching angle fitting curves for all the rotating speed sections through the above process. And in each rotating speed section, the operation of the motor is controlled according to the corresponding final switching angle fitting curve so as to achieve the optimal efficiency operation of the motor.
Optionally, in the step S3, the fitting the switching angles in the rotation speed segment includes: fitting the plurality of switching angles with a second order function. Specifically, in order to consider the processing speed and the processing result and ensure the rationality of processing resources, a general second-order function can be adopted for fitting in the process of fitting the switching angle in the rotating speed section to obtain an initial switching angle fitting curve so as to obtain a proper coefficient and obtain a final accurate curve. In the process of fitting by using a second-order function, in some scenarios, a second-order function is used for description, so that many points are not on the line. The switching angles in the speed section can be segmented into a plurality of different second-order functions according to the result of the fitting curve, and a complete fitting curve is described together. The specific segmentation can be trial and error, so that the second-order function can completely cover all points in the speed interval as a standard to be divided into a plurality of segments, and the specific number of the segments is determined by a curve. To reduce the number of fitting tasks, it may step up the number of segmentation stages until all the points fall on or near the corresponding fitting curve.
Optionally, in step S1, the segmenting the operation speed of the motor based on the rated rotation speed to obtain a plurality of rotation speed segments includes: segmenting the rotating speed of the motor according to three grades of low speed, medium speed and high speed to obtain three rotating speed segments; the range of the rotating speed section corresponding to the low-speed grade is less than 200RPM, the range of the rotating speed section corresponding to the medium-speed grade is from 200RPM to the rated rotating speed, and the range of the rotating speed section corresponding to the high-speed grade is greater than the rated rotating speed. Specifically, the motor rotation speed may be segmented according to three levels, namely, a low speed level, a medium speed level and a high speed level, wherein a rotation speed range less than 200RPM corresponds to the low speed level, a rotation speed range from 200RPM to a rated rotation speed range corresponds to the medium speed level, and a range in which the rotation speed is higher than the rated rotation speed is defined as the high speed level.
In one embodiment, the method for controlling the efficient operation of the motor further comprises: when the motor rotating speed is in the high-speed grade, controlling the motor rotating speed in an angle position control mode according to the final switch angle fitting curve; when the rotating speed of the motor is in the medium-speed grade, controlling the rotating speed of the motor in a variable-angle chopping control mode according to the final switch angle fitting curve; and when the rotating speed of the motor is in the low-speed grade, controlling the rotating speed of the motor in a fixed-angle chopping control mode according to the final switch angle fitting curve. Specifically, a suitable control mode can be selected according to different motor running rotating speeds, and after a corresponding switch fitting curve is obtained in the control mode, the motor can be controlled according to the corresponding switch fitting curve. For example, in the high-speed grade, the motor can be controlled to operate by an angle position control mode, and the operation condition of the motor in the high-speed section is changed by changing the on-off angle, so that the on-off angle is only related to the actual rotating speed and is not related to the torque, and the aim is to maintain the constant-power operation of the high-speed operation. When in the middle grade, the motor can be controlled to operate by a variable-angle chopping control mode, and chopping control is carried out while changing the switching angle, wherein the switching angle is not only related to the reference rotating speed but also related to the current load torque, and the aim is to maintain constant torque operation when in medium-speed operation. When in the low-level, because of its relatively low speed, it is common to control the motor speed using a fixed-angle chopper control in which the switching angle is dependent only on the load torque and not on the rotational speed, also in order to maintain constant torque operation at low-speed operation.
Optionally, in step S2, the obtaining, according to the rotation speed values, a plurality of switching angles corresponding to the plurality of rotation speed values respectively includes: and fixing the torque of the rotating speed value, and acquiring a switch angle corresponding to the minimum input current value of the motor as the switch angle corresponding to the rotating speed value. Specifically, the step of acquiring the switching angle corresponding to the rotation speed value may be to set the motor to operate at a fixed rotation speed value and a fixed load torque, adjust the switching angle, observe an input current when the motor operates, acquire the corresponding switching angle when a current value is the smallest, and use the switching angle as the switching angle of the rotation speed value. It can be understood that the same operation is performed on each rotation speed value, that is, a plurality of switch angles corresponding to a plurality of rotation speed values in the rotation speed section can be obtained.
As shown in fig. 3, in an embodiment, the method for controlling the efficient operation of the motor of the present invention further includes: and S71, pre-storing the final switching angle fitting curves, and acquiring the final switching angle fitting curves according to a preset period to control the motor. Specifically, after the final switch angle fitting curve is obtained, the final switch angle fitting curve is written into software, a preset period is configured to operate the instruction, namely, the switch angle is updated in real time according to the switch angle fitting curve according to the preset period, so that the motor action is controlled. And when the preset period is not reached, the final switching angle fitting curve does not need to be obtained to update the switching angle action.
As shown in fig. 3, the high-efficiency operation control device of the present invention includes:
the first execution unit 111 is configured to obtain a rated operation rotation speed of the motor, and segment the rotation speed of the motor by using the rated operation rotation speed as a reference to obtain a plurality of rotation speed segments;
the second execution unit 112 is configured to obtain a plurality of rotation speed values for the rotation speed segment according to preset intervals, and obtain a plurality of switch angles corresponding to the plurality of rotation speed values, where the switch angles include an on angle and an off angle;
a third executing unit 113, configured to fit the switching angles in the rotation speed segment to obtain an initial switching angle fitting curve corresponding to the rotation speed segment;
a fourth execution unit 114, configured to run the motor according to the initial switching angle fitting curve to obtain a corresponding power measuring curve;
the judging unit 120 is used for judging whether the rotation speed section contains a non-optimal rotation speed point according to the power measuring curve;
a fifth executing unit 115, configured to, when the determination result of the determining unit 120 is affirmative, obtain and update the switching angles corresponding to the non-optimal rotation speed value to obtain a plurality of updated switching angles corresponding to the rotation speed segments, and drive the third executing unit to operate;
a sixth executing unit 116, configured to, when the determination result of the determining unit 120 is negative, use the initial switching angle fitting curve as a final switching angle fitting curve corresponding to the rotation speed segment;
after the sixth executing unit 116 executes, the second executing unit 112, the third executing unit 113, the fourth executing unit 114, the fifth executing unit 115, and the sixth executing unit 116 respectively act on all the rotation speed sections to obtain a plurality of final switching angle fitting curves corresponding to the plurality of rotation speed sections respectively.
Further, the third executing unit 113 includes a second-order fitting unit, and the second-order fitting unit is configured to fit the switching angles by a second-order function.
Specifically, for a specific coordination operation process among units of the efficient operation control device, reference may be made to the efficient operation control method, which is not described herein again.
In addition, an electronic device of the present invention includes a memory and a processor; the memory is used for storing a computer program; the processor is used for executing the computer program to realize the motor efficient operation control method. In particular, according to an embodiment of the present invention, the processes described above with reference to the flowcharts may be implemented as a computer software program. For example, embodiments of the invention 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 in the flow chart. In such embodiments, the computer program may be downloaded and installed by an electronic device and executed to perform the above-described functions defined in the methods of embodiments of the present invention. The electronic equipment can be a terminal such as a notebook, a desktop, a tablet computer, a smart phone and the like, and can also be a server.
In addition, a computer storage medium of the present invention has a computer program stored thereon, and the computer program realizes a motor efficient operation control method of any one of the above when executed by a processor. In particular, it should be noted that the computer readable medium of the present invention can 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 or 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 invention, 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 the present invention, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either 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: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.
The computer readable medium may be embodied in the electronic device; or may exist separately without being assembled into the electronic device.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. The method for controlling the efficient operation of the motor is characterized by comprising the following steps of:
s1, obtaining the rated rotating speed of the motor, and segmenting the rotating speed of the motor by taking the rated rotating speed as a reference to obtain a plurality of rotating speed segments;
s2, obtaining a plurality of rotating speed values of the rotating speed section according to preset intervals, and obtaining a plurality of switch angles respectively corresponding to the rotating speed values, wherein the switch angles comprise turn-on angles and turn-off angles;
s3, fitting the switch angles in the rotating speed section to obtain an initial switch angle fitting curve corresponding to the rotating speed section, and operating the motor according to the initial switch angle fitting curve to obtain a power measuring curve corresponding to the rotating speed section;
s4, judging whether the rotating speed section contains a non-optimal rotating speed point or not according to the power measuring curve, if so, executing a step S5, and if not, executing a step S6;
s5, obtaining and updating the switch angles corresponding to the non-optimal rotating speed points to obtain a plurality of updated switch angles corresponding to the rotating speed sections, and executing the step S3;
s6, taking the initial switching angle fitting curve as a final switching angle fitting curve corresponding to the rotating speed section;
s7, executing the steps S2 to S6 to all the rotating speed sections respectively to obtain a plurality of final switch angle fitting curves corresponding to the rotating speed sections respectively.
2. The method for controlling efficient operation of an electric motor according to claim 1, wherein in the step S3, the fitting the plurality of switching angles within the rotation speed section includes: fitting the plurality of switching angles with a second order function.
3. The method for controlling efficient operation of a motor according to claim 1, wherein in the step S1, the segmenting the rotational speed of the motor based on the rated rotational speed to obtain a plurality of rotational speed segments comprises:
segmenting the rotating speed of the motor according to three grades of low speed, medium speed and high speed to obtain three rotating speed segments; the range of the rotating speed section corresponding to the low-speed grade is less than 200RPM, the range of the rotating speed section corresponding to the medium-speed grade is from 200RPM to the rated rotating speed, and the range of the rotating speed section corresponding to the high-speed grade is greater than the rated rotating speed.
4. The method of controlling efficient operation of an electric motor of claim 3, further comprising:
when the motor rotating speed is in the high-speed grade, controlling the motor rotating speed in an angle position control mode according to the final switch angle fitting curve;
when the rotating speed of the motor is in the medium-speed grade, controlling the rotating speed of the motor in a variable-angle chopping control mode according to the final switch angle fitting curve;
and when the rotating speed of the motor is in the low-speed grade, controlling the rotating speed of the motor in a fixed-angle chopping control mode according to the final switch angle fitting curve.
5. The method of controlling efficient operation of an electric motor according to claim 1, wherein in the step S2, the obtaining of the plurality of switching angles corresponding to the plurality of rotation speed values respectively comprises:
and fixing the torque of the rotating speed value, and acquiring a switch angle corresponding to the minimum input current value of the motor as the switch angle corresponding to the rotating speed value.
6. The method of controlling efficient operation of an electric motor of claim 1, further comprising:
and S71, pre-storing the final switching angle fitting curves, and acquiring the final switching angle fitting curves according to a preset period to control the motor.
7. An efficient operation control device for a motor, comprising:
the first execution unit is used for acquiring the rated operation rotating speed of the motor and segmenting the rotating speed of the motor by taking the rated operation rotating speed as a reference so as to obtain a plurality of rotating speed segments;
the second execution unit is used for acquiring a plurality of rotating speed values of the rotating speed section according to preset intervals and acquiring a plurality of switching angles respectively corresponding to the plurality of rotating speed values, wherein the switching angles comprise turn-on angles and turn-off angles;
the third execution unit is used for fitting the plurality of switching angles in the rotating speed section to obtain an initial switching angle fitting curve corresponding to the rotating speed section;
the fourth execution unit is used for operating the motor according to the initial switch angle fitting curve to obtain a corresponding power measuring curve;
the judging unit is used for judging whether the rotating speed section contains a non-optimal rotating speed point or not according to the power measuring curve;
a fifth execution unit, configured to, when the determination result of the determination unit is affirmative, obtain and update the switching angles corresponding to the non-optimal rotation speed points to obtain a plurality of updated switching angles corresponding to the rotation speed segments, and drive the third execution unit to operate;
a sixth executing unit, configured to, when the determination result of the determining unit is negative, use the initial switching angle fitting curve as a final switching angle fitting curve corresponding to the rotation speed segment;
after the sixth execution unit executes the operation, the second execution unit, the third execution unit, the fourth execution unit, the fifth execution unit and the sixth execution unit respectively act on all the rotation speed sections to obtain a plurality of final switch angle fitting curves corresponding to the rotation speed sections respectively.
8. The efficient motor operation control apparatus as claimed in claim 7,
the third execution unit comprises a second-order fitting unit, and the second-order fitting unit is used for fitting the plurality of switching angles by a second-order function.
9. A computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements a motor efficient operation control method according to any one of claims 1 to 6.
10. An electronic device comprising a memory and a processor; the memory is used for storing a computer program;
the processor is used for executing the computer program to realize the motor efficient operation control method according to any one of claims 1 to 6.
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