CN118209858A - Method, device, equipment and medium for testing alternating-current copper loss and iron loss of motor - Google Patents
Method, device, equipment and medium for testing alternating-current copper loss and iron loss of motor Download PDFInfo
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- CN118209858A CN118209858A CN202410550194.6A CN202410550194A CN118209858A CN 118209858 A CN118209858 A CN 118209858A CN 202410550194 A CN202410550194 A CN 202410550194A CN 118209858 A CN118209858 A CN 118209858A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 477
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 266
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 266
- 239000010949 copper Substances 0.000 title claims abstract description 266
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 247
- 238000012360 testing method Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 42
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 109
- 230000004907 flux Effects 0.000 claims description 41
- 230000035699 permeability Effects 0.000 claims description 35
- 230000005284 excitation Effects 0.000 claims description 19
- 238000004590 computer program Methods 0.000 claims description 16
- 238000012937 correction Methods 0.000 claims description 15
- 238000010998 test method Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 abstract description 10
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- 238000004088 simulation Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 8
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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
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Abstract
The invention discloses a method, a device, equipment and a medium for testing alternating current copper loss and iron loss of a motor, which comprise the following steps: obtaining the iron loss phase difference multiple value of the first motor and the second motor according to the magnetic density value; determining a first total loss and a second total loss according to a first preset rotating speed and an exciting current value; acquiring bearing loss, wind friction loss and direct current copper loss of a motor; obtaining a sum value of the first alternating current copper loss and the iron loss and a sum value of the second alternating current copper loss and the iron loss according to the first total loss, the second total loss, the bearing loss, the wind friction loss and the direct current copper loss; and acquiring a first alternating current copper consumption value, a first iron consumption value, a second alternating current copper consumption value and a second iron consumption value of the first motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption and the difference multiple value of the iron consumption, so that the accurate separation acquisition of the alternating current copper consumption and the iron consumption of the motor is realized, and the efficiency and the temperature rise of the motor are accurately predicted.
Description
Technical Field
The invention relates to the technical field of motor loss test, in particular to a method, a device, equipment and a medium for testing alternating current copper loss and iron loss of a motor.
Background
Motor efficiency is one of the important indicators of the drive motor. Copper loss and iron loss are dominant in various losses of the motor, and are influenced by actual complex magnetic fields of the motor. In the actual test process, it is difficult to accurately separate the alternating current copper loss and the iron loss of the motor only by a test method; the alternating current copper loss and the iron loss are entangled with each other, so that the efficiency of the motor and the prediction accuracy of temperature rise are difficult. At present, alternating current copper loss and iron loss can be given only through motor electromagnetic simulation, and the accuracy of the alternating current copper loss and the iron loss is not verified through tests.
Disclosure of Invention
The invention provides a method, a device, equipment and a medium for testing alternating-current copper loss and iron loss of a motor, which are used for realizing separation and acquisition of the alternating-current copper loss and the iron loss of the motor at different rotating speeds and are beneficial to accurately predicting the efficiency and the temperature rise of the motor.
According to one aspect of the invention, a method for testing alternating current copper loss and iron loss of a motor is provided, and the method is applied to a device for testing alternating current copper loss and iron loss of a motor, wherein the device for testing alternating current copper loss and iron loss of a motor at least comprises a first motor and a second motor, the first motor comprises a first silicon steel, the second motor comprises a second silicon steel, and the materials of the first silicon steel and the second silicon steel are different; the test method comprises the following steps:
obtaining the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability;
obtaining the iron loss phase difference multiple value of the first motor and the second motor according to the magnetic density value;
Acquiring an excitation current value according to the magnetic density value;
determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value;
Acquiring first bearing loss, first wind friction loss and first direct current copper loss of the first motor and second bearing loss, second wind friction loss and second direct current copper loss of the second motor;
Obtaining a first alternating current copper loss and iron loss sum value of the first motor according to the first total loss, the first bearing loss, the first wind friction loss and the first direct current copper loss, and obtaining a second alternating current copper loss and iron loss sum value of the second motor according to the second total loss, the second bearing loss, the second wind friction loss and the second direct current copper loss;
and respectively obtaining a first alternating current copper consumption value, a first iron consumption value, a second alternating current copper consumption value and a second iron consumption value of the first motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption and the phase difference multiple value.
Optionally, before obtaining the magnetic density values of the first silicon steel and the second silicon steel under the same relative magnetic permeability, the method further includes:
Establishing a motor electromagnetic model, and obtaining a preset no-load air gap flux density;
acquiring the actual empty-load air gap flux density of the first motor or the second motor;
and acquiring an electromagnetic correction model of the motor according to the preset empty air gap flux density and the actual empty air gap flux density.
Optionally, obtaining the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability includes:
Acquiring a first curve of the first silicon steel and a second curve of the second silicon steel under the same coordinate system according to the first silicon steel and the second silicon steel, wherein the abscissa of the coordinate system is relative magnetic permeability, and the ordinate is magnetic density;
And obtaining the magnetic density values of the first silicon steel and the second silicon steel under the same relative magnetic permeability according to the first curve and the second curve.
Optionally, obtaining the iron loss phase difference multiple value of the first motor and the second motor according to the magnetic density value includes:
Acquiring a second preset rotating speed;
Acquiring an electric frequency according to the second preset rotating speed;
Acquiring a first sub-iron loss value of the first silicon steel according to the magnetic density value and the first electric frequency and acquiring a second sub-iron loss value of the second silicon steel according to the magnetic density value and the second electric frequency;
and obtaining the iron loss difference multiple value of the first motor and the second motor according to the first iron loss value and the second iron loss value.
Optionally, obtaining the electrical frequency according to the second preset rotation speed includes:
obtaining pole pair numbers of the first motor and the second motor;
and acquiring an electric frequency according to the pole pair number and the second preset rotating speed.
Optionally, obtaining a first ac copper loss and iron loss sum value of the first motor according to the first total loss, the first bearing loss, the first wind friction loss, and the first dc copper loss, and obtaining a second ac copper loss and iron loss sum value of the second motor according to the second total loss, the second bearing loss, the second wind friction loss, and the second dc copper loss, including:
Obtaining a first loss value according to the first bearing loss, the first wind friction loss and the first direct current copper loss, and obtaining a second loss value according to the second bearing loss, the second wind friction loss and the second direct current copper loss;
And obtaining a first total copper loss and iron loss sum value according to the first total loss value and the first loss value, and obtaining a second total copper loss and iron loss sum value according to the second total loss value and the second loss value.
Optionally, the first ac copper loss value is the same as the second ac copper loss value.
According to another aspect of the present invention, there is provided a test apparatus for motor ac copper loss and iron loss, including the test method for motor ac copper loss and iron loss according to any one of the above aspects, the test apparatus comprising:
The magnetic density value acquisition module is used for acquiring the magnetic density values of the first silicon steel and the second silicon steel under the same relative magnetic permeability;
The iron loss phase difference multiple value acquisition module is used for acquiring the iron loss phase difference multiple values of the first motor and the second motor according to the magnetic density value;
the excitation current value acquisition module is used for acquiring an excitation current value according to the magnetic flux density value;
The first preset rotating speed acquisition module is used for acquiring first preset rotating speeds of the first motor and the second motor;
The total loss acquisition module is used for determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value;
The loss acquisition module is used for acquiring the first bearing loss, the first wind friction loss and the first direct current copper loss of the first motor and the second bearing loss, the second wind friction loss and the second direct current copper loss of the second motor;
An ac copper loss and iron loss sum obtaining module configured to obtain a first ac copper loss and iron loss sum of the first motor according to the first total loss, the first bearing loss, the first wind friction loss, and the first dc copper loss, and obtain a second ac copper loss and iron loss sum of the second motor according to the second total loss, the second bearing loss, the second wind friction loss, and the second dc copper loss;
and the alternating current copper consumption value and iron consumption value acquisition module is used for respectively acquiring a first alternating current copper consumption value, a first iron consumption value, a second alternating current copper consumption value and a second iron consumption value of the first motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption and the phase difference multiple value.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of testing motor ac copper and iron losses of any of the above aspects.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute the method of testing ac copper and iron losses of a motor according to any one of the above aspects.
According to the technical scheme, the method for testing the alternating-current copper loss and the iron loss of the motor is applied to a device for testing the alternating-current copper loss and the iron loss of the motor, the device for testing the alternating-current copper loss and the iron loss of the motor at least comprises a first motor and a second motor, the first motor comprises first silicon steel, the second motor comprises second silicon steel, the materials of the first silicon steel and the second silicon steel are different, and other structural parameters are the same; the testing method comprises the following steps: acquiring magnetic density values of the first motor and the second motor under the same relative magnetic permeability; obtaining the iron loss phase difference multiple value of the first motor and the second motor according to the magnetic density value; obtaining an excitation current value according to the magnetic density value; acquiring first preset rotating speeds of the first motor and the second motor; determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value; acquiring first bearing loss, first wind friction loss, first direct current copper loss and second bearing loss, second wind friction loss and second direct current copper loss of a first motor; obtaining a first alternating current copper loss and iron loss sum value of a first motor according to the first total loss, the first bearing loss, the first wind friction loss and the first direct current copper loss, and obtaining a second alternating current copper loss and iron loss sum value of a second motor according to the second total loss, the second bearing loss, the second wind friction loss and the second direct current copper loss; and respectively acquiring a first alternating current copper consumption value, a first iron consumption value, a second alternating current copper consumption value and a second iron consumption value of the first motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption phase difference multiple value so as to realize the separation acquisition of the alternating current copper consumption and the iron consumption of the motor at different rotating speeds, thereby being beneficial to accurately predicting the efficiency and the temperature rise of the motor.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a method for testing ac copper loss and iron loss of a motor according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for testing AC copper and iron losses of a motor according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for testing AC copper and iron losses of a motor according to an embodiment of the present invention;
FIG. 4 is a flow chart of another method for testing AC copper and iron losses of a motor according to an embodiment of the present invention;
FIG. 5 is a flow chart of another method for testing AC copper and iron losses of a motor according to an embodiment of the present invention;
FIG. 6 is a flow chart of another method for testing AC copper and iron losses of a motor according to an embodiment of the present invention;
Fig. 7 is a schematic structural diagram of a test device for ac copper loss and iron loss of a motor according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. 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.
Fig. 1 is a flowchart of a method for testing ac copper consumption and iron consumption of a motor according to an embodiment of the present invention, where the embodiment is applicable to a case of testing ac copper consumption and iron consumption of a motor, and the method may be performed by a device for testing ac copper consumption and iron consumption of a motor, and the device for testing ac copper consumption and iron consumption of a motor may be implemented in a form of hardware and/or software. Be applied to testing arrangement of motor exchange copper loss and iron loss, testing arrangement of motor exchange copper loss and iron loss includes first motor and second motor at least, first motor includes first silicon steel, the second motor includes the second silicon steel, the material of first silicon steel and second silicon steel is different, the silicon steel grade of first motor and second motor is different, the other structural parameters of first motor and second motor are the same, structural parameters includes, the stator external diameter, the stator internal diameter, the groove depth, the groove width, the groove opening, the groove number, the rotor external diameter, the rotor internal diameter, the pole number, sheet type structure, the pole arc coefficient, the permanent magnet grade, the oblique pole segmentation number, oblique pole angle. As shown in fig. 1, the test method includes:
S101, obtaining the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability.
According to the characteristics of the materials of the silicon steel, multiple groups of relative magnetic permeability and magnetic density values can be obtained, and then relative magnetic permeability-magnetic density curves of the relative magnetic permeability and magnetic density values can be drawn.
S102, obtaining the iron loss phase difference multiple value of the first motor and the second motor according to the magnetic density value.
And obtaining the iron losses under different preset rotating speeds by utilizing a magnetic property tester to obtain parts in the first silicon steel and the second silicon steel, and further obtaining the iron loss phase difference multiple value K corresponding to the iron loss phase difference multiple value K of the first motor and the second motor under the same magnetic density value, wherein the iron loss phase difference multiple value is changed along with the change of the rotating speeds.
S103, obtaining an excitation current value according to the magnetic density value.
The first motor and the second motor can be simulated by using a motor electromagnetic model, so that the current when the average magnetic density of the motor tooth part and the yoke part is the magnetic density value is I 1, and because the relative magnetic permeability of the first motor and the second motor corresponding to the magnetic density value is the same, the excitation current required by motor operation is the same, and the excitation current value is I 1.
S104, acquiring first preset rotating speeds of the first motor and the second motor.
The first motor and the second motor can operate at a first preset rotating speed, the first preset rotating speed can be set according to actual design requirements, the embodiment of the invention is not particularly limited, and the alternating current copper consumption and the iron consumption of the motors at different rotating speeds can be correspondingly obtained according to the setting of the first preset rotating speed.
S105, determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value.
The first motor and the second motor are simultaneously supplied with the same exciting current, namely, the exciting current value I 1 is supplied, so that a first total loss P 1 of the first motor at a first preset rotating speed and a second total loss P 2 of the second motor at the first preset rotating speed are obtained.
And S106, acquiring the first bearing loss, the first wind friction loss, the first direct current copper loss and the second bearing loss, the second wind friction loss and the second direct current copper loss of the first motor.
The first bearing loss P 3 of the first motor and the second bearing loss P 4 of the second motor can be obtained from manufacturers. The first wind friction loss P 5 of the first motor and the second wind friction loss P 6 of the second motor can be obtained through a non-magnetic conductive rotor test, and the loss of friction with air when the motor rotor rotates is obtained. The first direct current copper loss P 7 of the first motor can be obtained by obtaining the direct current resistance R 1 of the first motor, and the first direct current copper loss meets the formula P 7＝I1 2*R1; the second direct current copper loss P 8 of the second motor can satisfy the formula P 8＝I1 2*R2 by obtaining the direct current resistance R 2 of the second motor.
And S107, obtaining a first alternating current copper consumption and iron consumption sum value of the first motor according to the first total loss, the first bearing loss, the first wind friction loss and the first direct current copper consumption, and obtaining a second alternating current copper consumption and iron consumption sum value of the second motor according to the second total loss, the second bearing loss, the second wind friction loss and the second direct current copper consumption.
The total loss of the motor is generally composed of bearing loss, wind friction loss, direct current copper loss, alternating current copper loss and iron loss, the first total copper loss and iron loss value P 9 can be obtained by subtracting the first bearing loss P 3, the first wind friction loss P 5 and the first direct current copper loss P 7 respectively according to the first total loss P 1, and the second total copper loss and iron loss value P 10 can be obtained by subtracting the second bearing loss P 4, the second wind friction loss P 6 and the second direct current copper loss P 8 respectively according to the second total loss P 2.
S108, respectively obtaining a first alternating current copper consumption value, a first iron consumption value and a second alternating current copper consumption value of the second motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption phase difference multiple value.
Wherein the first motor and the second motor are supplied with the same current and the silicon steel materials at the first motor and the second motor are the same, and other parameters are the same, so that the first AC copper loss value P 11 of the first motor and the second AC copper loss value P 12 of the second motor are the same, the first AC copper loss value P 11 and the first iron loss value P 13 are added to obtain a first AC copper loss and iron loss sum value P 9, the second AC copper loss value P 12 and the second iron loss value P 14 are added to obtain a second AC copper loss and iron loss sum value P 10, furthermore, on the premise that the first AC copper loss and iron loss sum value P 9, the second AC copper loss and iron loss sum value P 10 and the iron loss difference multiple value K are obtained, equations can be established for the first AC copper loss value P 11, the second AC copper loss value P 12, the first iron loss value P 13, the second iron loss value P 14, the first AC copper loss and iron loss sum value P 9, the second AC copper loss and iron loss sum value P 10 and the iron loss difference multiple value K, namely P 14＝K*P13;P9＝P11+P13;P10＝P12+P14; because the first alternating current copper loss value P 11 and the second alternating current copper loss value P 12 are the same, the iron loss difference multiple value K is also a known number under the condition that the rotating speed is known, and then the alternating current copper loss value and the iron loss value of the first motor and the second motor under the first preset rotating speed can be obtained, and the accurate separation test of the alternating current copper loss value and the iron loss value of the motor under different rotating speeds is realized by setting different first preset rotating speeds.
According to the embodiment of the invention, a iron loss phase difference multiple value, a first total loss and a second total loss are obtained according to a magnetic density value, a first preset rotating speed and an exciting current value; acquiring bearing loss, wind friction loss and direct current copper loss of a motor; obtaining a sum value of the first alternating current copper loss and the iron loss and a sum value of the second alternating current copper loss and the iron loss according to the first total loss, the second total loss, the bearing loss, the wind friction loss and the direct current copper loss; according to the total value of the first alternating current copper loss and the iron loss, the total value of the second alternating current copper loss and the iron loss and the phase difference multiple value of the iron loss, the first alternating current copper loss value of the first motor, the first iron loss value of the second motor, the second alternating current copper loss value of the second motor and the second iron loss value of the first motor are obtained, the accurate separation of the alternating current copper loss and the iron loss of the motor is realized by combining electromagnetic simulation, experimental test and theoretical calculation, the accurate prediction of the efficiency and the temperature rise of the motor is facilitated, and reliable data support is provided for design optimization and performance evaluation of the motor.
Optionally, fig. 2 is a flowchart of another method for testing ac copper consumption and iron consumption of a motor according to an embodiment of the present invention, as shown in fig. 2, where the testing method includes:
S201, a motor electromagnetic model is built, and a preset no-load air gap flux density is obtained.
The simulation of the no-load electromagnetic of the motor is realized by establishing an electromagnetic model of the motor, and the preset no-load air gap flux density is obtained.
S202, acquiring the actual empty-load air gap flux density of the first motor or the second motor.
The motor meter magnetic tester is used for carrying out no-load magnetic flux density testing on the first motor or the second motor, so that the actual no-load air gap magnetic flux density of the first motor or the second motor is tested, one of the first motor and the second motor can be selected for correcting the electrode electromagnetic model, and the accuracy of a follow-up simulation structure is guaranteed.
S203, acquiring an electromagnetic correction model of the motor according to the preset empty air gap flux density and the actual empty air gap flux density.
The motor electromagnetic correction model can be obtained by correcting the motor based on the difference of the preset empty-load air-gap flux density obtained through simulation and the actual empty-load air-gap flux density obtained through actual test, and further the motor prediction precision is improved.
S204, obtaining the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability.
S205, obtaining the iron loss phase difference multiple value of the first motor and the second motor according to the magnetic density value.
S206, obtaining the excitation current value according to the motor electromagnetic correction model and the magnetic density value.
The first motor and the second motor can be simulated by using a motor electromagnetic correction model, so that the current when the average magnetic density of the motor tooth part and the yoke part is the magnetic density value is I 1, and because the relative magnetic permeability of the first motor and the second motor corresponding to the magnetic density value is the same, the excitation current required by motor operation is the same, and the excitation current value is I 1.
S207, acquiring first preset rotating speeds of the first motor and the second motor.
S208, determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value.
S209, acquiring first bearing loss, first wind friction loss and first direct current copper loss of the first motor and second bearing loss, second wind friction loss and second direct current copper loss of the second motor.
S210, obtaining a first alternating current copper consumption and iron consumption sum value of the first motor according to the first total loss, the first bearing loss, the first wind friction loss and the first direct current copper consumption, and obtaining a second alternating current copper consumption and iron consumption sum value of the second motor according to the second total loss, the second bearing loss, the second wind friction loss and the second direct current copper consumption.
S211, respectively obtaining a first alternating current copper consumption value, a first iron consumption value and a second alternating current copper consumption value of the second motor and a second iron consumption value of the first motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption phase difference multiple value.
According to the embodiment of the invention, the preset empty-load air gap flux density is obtained by establishing a motor electromagnetic model; the method comprises the steps of obtaining the actual no-load air gap flux density of the first motor or the second motor, obtaining a motor electromagnetic correction model according to the preset no-load air gap flux density and the actual no-load air gap flux density, improving prediction accuracy, further combining experimental tests and theoretical calculation to achieve accurate separation of alternating-current copper loss and iron loss of the motor, being beneficial to accurately predicting efficiency and temperature rise of the motor, and providing reliable data support for design optimization and performance evaluation of the motor.
Optionally, fig. 3 is a flowchart of another method for testing ac copper consumption and iron consumption of a motor according to an embodiment of the present invention, as shown in fig. 3, where the testing method includes:
s301, establishing an electromagnetic model of the motor, and obtaining a preset no-load air gap flux density.
S302, acquiring the actual empty-load air gap flux density of the first motor or the second motor.
S303, acquiring an electromagnetic correction model of the motor according to the preset empty air gap flux density and the actual empty air gap flux density.
S304, acquiring a first curve of the first silicon steel and a second curve of the second silicon steel under the same coordinate system according to the first silicon steel and the second silicon steel, wherein the abscissa of the coordinate system is relative magnetic permeability, and the ordinate is magnetic density.
According to the characteristics of silicon steel materials, the differences exist between the relative magnetic permeability and the magnetic density values which are obtained by different correspondence of the silicon steel, the distribution curves of the relative magnetic permeability and the magnetic density values can be obtained by corresponding equipment for the corresponding silicon steel materials, multiple groups of relative magnetic permeability and magnetic density values of the first silicon steel and multiple groups of relative magnetic permeability and magnetic density values of the second silicon steel are obtained, and then the relative magnetic permeability-magnetic density curves of the first silicon steel in the first motor, namely the relative magnetic permeability-magnetic density curves of the first curve and the second silicon steel in the second motor, namely the second curve, are drawn under the same coordinate system.
S305, obtaining the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability according to the first curve and the second curve.
The method comprises the steps of obtaining a first curve and a second curve, wherein the first curve and the second curve have intersection points in a coordinate system, so that the same magnetic density value of the first silicon steel and the second silicon steel can be obtained under the same relative magnetic permeability, and the iron loss is usually the sum of hysteresis loss and eddy current loss generated by an iron core made of the silicon steel under the action of an alternating magnetic field.
S306, obtaining the iron loss phase difference multiple value of the first motor and the second motor according to the magnetic density value.
S307, the excitation current value is obtained according to the motor electromagnetic correction model and the magnetic density value.
S308, obtaining first preset rotating speeds of the first motor and the second motor.
S309, determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value.
S310, acquiring first bearing loss, first wind friction loss and first direct current copper loss of the first motor and second bearing loss, second wind friction loss and second direct current copper loss of the second motor.
And S311, obtaining a first alternating current copper consumption and iron consumption sum value of the first motor according to the first total loss, the first bearing loss, the first wind friction loss and the first direct current copper consumption, and obtaining a second alternating current copper consumption and iron consumption sum value of the second motor according to the second total loss, the second bearing loss, the second wind friction loss and the second direct current copper consumption.
S312, respectively obtaining a first alternating current copper consumption value, a first iron consumption value and a second alternating current copper consumption value and a second iron consumption value of the first motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption phase difference multiple value.
According to the embodiment of the invention, the first curve of the first silicon steel and the second curve of the second silicon steel under the same coordinate system are obtained according to the first silicon steel and the second silicon steel, wherein the abscissa of the coordinate system is the relative magnetic permeability, the ordinate is the magnetic density value, and the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability is obtained according to the first curve and the second curve, so that the precise separation of the alternating current copper loss and the iron loss of the motor is realized by combining electromagnetic simulation, experimental test and theoretical calculation, the efficiency and the temperature rise of the motor are accurately predicted, and reliable data support is provided for design optimization and performance evaluation of the motor.
Optionally, fig. 4 is a flowchart of another method for testing ac copper consumption and iron consumption of a motor according to an embodiment of the present invention, as shown in fig. 4, where the testing method includes:
s401, a motor electromagnetic model is built, and a preset no-load air gap flux density is obtained.
S402, acquiring the actual empty-load air gap flux density of the first motor or the second motor.
S403, acquiring an electromagnetic correction model of the motor according to the preset empty air gap flux density and the actual empty air gap flux density.
S404, acquiring a first curve of the first silicon steel and a second curve of the second silicon steel under the same coordinate system according to the first silicon steel and the second silicon steel, wherein the abscissa of the coordinate system is relative magnetic permeability, and the ordinate is magnetic density.
S405, obtaining the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability according to the first curve and the second curve.
S406, obtaining a second preset rotating speed.
S407, acquiring the electric frequency according to the second preset rotating speed.
The second preset rotating speed can be set according to actual design requirements, and accordingly, the change of the second preset rotating speed can correspondingly obtain the electric frequency of the motor, and the electric frequencies corresponding to different rotating speeds are also different.
S408, obtaining a first sub-iron loss value of the first silicon steel and a second sub-iron loss value of the second silicon steel according to the magnetic density value and the electric frequency.
And measuring a first sub-iron loss value of the first silicon steel under the magnetic density value and the electric frequency and measuring a second sub-iron loss value of the second silicon steel under the same magnetic density value and the same electric frequency by using a magnetic performance tester.
S409, obtaining the iron loss difference times value of the first motor and the second motor according to the first iron loss value and the second iron loss value.
And carrying out division operation according to the first sub-iron loss value and the second sub-iron loss value to obtain an iron loss difference multiple value of the first motor and the second motor, wherein the iron loss difference multiple value changes along with the change of the rotating speed, so that the alternating current copper loss value and the iron loss of the first motor and the second motor can be conveniently obtained in a separated mode under different rotating speeds and different electric frequencies.
S410, obtaining the excitation current value according to the motor electromagnetic correction model and the magnetic density value.
S411, acquiring first preset rotating speeds of the first motor and the second motor.
S412, determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value.
And S413, acquiring the first bearing loss, the first wind friction loss and the first direct current copper loss of the first motor and the second bearing loss, the second wind friction loss and the second direct current copper loss of the second motor.
And S414, obtaining a first alternating current copper consumption and iron consumption sum value of the first motor according to the first total loss, the first bearing loss, the first wind friction loss and the first direct current copper consumption, and obtaining a second alternating current copper consumption and iron consumption sum value of the second motor according to the second total loss, the second bearing loss, the second wind friction loss and the second direct current copper consumption.
S415, respectively obtaining a first alternating current copper consumption value, a first iron consumption value and a second alternating current copper consumption value and a second iron consumption value of the first motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption phase difference multiple value.
According to the embodiment of the invention, the second preset rotating speed is obtained, the electric frequency is obtained according to the second preset rotating speed, the first sub-iron loss value of the first silicon steel and the second sub-iron loss value of the second silicon steel are obtained according to the magnetic density value and the electric frequency, the iron loss difference multiple value of the first motor and the second motor is obtained according to the first sub-iron loss value and the second sub-iron loss value, and then the accurate separation of the alternating current copper loss and the iron loss of the motor is realized by combining electromagnetic simulation, experimental test and theoretical calculation, so that the efficiency and the temperature rise of the motor can be accurately predicted, and reliable data support is provided for design optimization and performance evaluation of the motor.
Optionally, fig. 5 is a flowchart of another method for testing ac copper consumption and iron consumption of a motor according to an embodiment of the present invention, as shown in fig. 5, where the testing method includes:
S501, a motor electromagnetic model is built, and a preset no-load air gap flux density is obtained.
S502, acquiring the actual empty-load air gap flux density of the first motor or the second motor.
S503, acquiring an electromagnetic correction model of the motor according to the preset empty air gap flux density and the actual empty air gap flux density.
S504, acquiring a first curve of the first silicon steel and a second curve of the second silicon steel under the same coordinate system according to the first silicon steel and the second silicon steel, wherein the abscissa of the coordinate system is relative magnetic permeability, and the ordinate is magnetic density.
S505, obtaining the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability according to the first curve and the second curve.
S506, obtaining a second preset rotating speed.
S507, obtaining the pole pair numbers of the first motor and the second motor.
S508, acquiring the electric frequency according to the pole pair number and the second preset rotating speed.
The pole pair numbers of the first motor and the second motor are the same, and the pole pair numbers and the rotating speed meet the formula f=n, and the ratio is P/60; f is electric frequency, n is rotational speed, and P is the pole pair number, so when the pole pair number of the first motor and the second preset rotational speed are obtained, the electric frequency of the motor can be obtained by taking the formula, different electric frequencies can be obtained through taking different rotational speeds of the motor, further, the iron loss phase difference multiple value along with the change of the rotational speed can be obtained, and the separation and the acquisition of the alternating copper loss value and the iron loss value of the motor under different rotational speeds and electric frequencies are ensured.
S509, acquiring a first sub-iron loss value of the first silicon steel and a second sub-iron loss value of the second silicon steel according to the magnetic density value and the electric frequency.
S510, obtaining the iron loss difference times value of the first motor and the second motor according to the first iron loss value and the second iron loss value.
S511, obtaining the excitation current value according to the motor electromagnetic correction model and the magnetic density value.
S512, obtaining first preset rotating speeds of the first motor and the second motor.
S513, determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value.
S514, acquiring the first bearing loss, the first wind friction loss, the first direct current copper loss and the second bearing loss, the second wind friction loss and the second direct current copper loss of the first motor.
And S515, obtaining a first alternating current copper consumption and iron consumption sum value of the first motor according to the first total loss, the first bearing loss, the first wind friction loss and the first direct current copper consumption, and obtaining a second alternating current copper consumption and iron consumption sum value of the second motor according to the second total loss, the second bearing loss, the second wind friction loss and the second direct current copper consumption.
S516, respectively obtaining a first alternating current copper consumption value, a first iron consumption value and a second alternating current copper consumption value and a second iron consumption value of the first motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption phase difference multiple value.
According to the embodiment of the invention, the pole pair numbers of the first motor and the second motor are obtained; and the electric frequency is obtained according to the pole pair number and the second preset rotating speed, and then the electromagnetic simulation, experimental test and theoretical calculation are combined to realize the accurate separation of the alternating-current copper loss and the iron loss of the motor, thereby being beneficial to accurately predicting the efficiency and the temperature rise of the motor and providing reliable data support for the design optimization and the performance evaluation of the motor.
Optionally, fig. 6 is a flowchart of another method for testing ac copper consumption and iron consumption of a motor according to an embodiment of the present invention, as shown in fig. 6, where the testing method includes:
S601, a motor electromagnetic model is built, and a preset no-load air gap flux density is obtained.
S602, acquiring the actual empty-load air gap flux density of the first motor or the second motor.
S603, acquiring an electromagnetic correction model of the motor according to the preset empty air gap flux density and the actual empty air gap flux density.
S604, acquiring a first curve of the first silicon steel and a second curve of the second silicon steel under the same coordinate system according to the first silicon steel and the second silicon steel, wherein the abscissa of the coordinate system is relative magnetic permeability, and the ordinate is magnetic density.
S605, obtaining the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability according to the first curve and the second curve.
S606, obtaining a second preset rotating speed
S607, the pole pair numbers of the first motor and the second motor are obtained.
S608, acquiring the electric frequency according to the pole pair number and the second preset rotating speed.
S609, obtaining a first sub-iron loss value of the first silicon steel and a second sub-iron loss value of the second silicon steel according to the magnetic density value and the electric frequency.
S610, obtaining the iron loss difference times value of the first motor and the second motor according to the first iron loss value and the second iron loss value.
S611, obtaining the excitation current value according to the motor electromagnetic correction model and the magnetic density value.
S612, obtaining first preset rotating speeds of the first motor and the second motor.
S613, determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value.
S614, the first bearing loss, the first wind friction loss, the first direct current copper loss and the second bearing loss, the second wind friction loss and the second direct current copper loss of the first motor are obtained.
S615, obtaining a first loss value according to the first bearing loss, the first wind friction loss and the first direct current copper loss and obtaining a second loss value according to the second bearing loss, the second wind friction loss and the second direct current copper loss.
And carrying out summation operation on the first bearing loss, the first wind friction loss and the first direct current copper loss to obtain a first loss value, and carrying out summation operation on the second bearing loss, the second wind friction loss and the second direct current copper loss to obtain a second loss value, so that the subsequent acquisition of the sum value of the alternating current copper loss and the iron loss is facilitated.
S616, obtaining a first total copper consumption and iron consumption sum value according to the first total loss value and the first loss value and obtaining a second total copper consumption and iron consumption sum value according to the second total loss value and the second loss value.
And subtracting the second total loss value and the second loss value of the second motor to obtain a second total copper loss and iron loss sum value.
S617, respectively obtaining a first alternating current copper consumption value, a first iron consumption value and a second alternating current copper consumption value of the second motor and a second iron consumption value of the first motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption phase difference multiple value.
According to the embodiment of the invention, the first loss value is obtained according to the first bearing loss, the first wind friction loss and the first direct current copper loss, the second loss value is obtained according to the second bearing loss, the second wind friction loss and the second direct current copper loss, the first total loss value and the first total loss value are obtained, and the second total loss value are obtained according to the second total loss value and the second total loss value, so that the accurate separation of the alternating current copper loss and the iron loss of the motor is realized by combining electromagnetic simulation, experimental test and theoretical calculation, the efficiency and the temperature rise of the motor are accurately predicted, and reliable data support is provided for design optimization and performance evaluation of the motor.
Optionally, the first ac copper loss value is the same as the second ac copper loss value.
The first motor and the second motor are supplied with the same current, and the parameters of the first motor and the second motor are the same, namely, the actual magnetic fields of the motors are the same due to the amplitude value and the frequency of the current, and the corresponding first alternating current copper loss value of the first motor is the same as the corresponding second alternating current copper loss value of the second motor.
Fig. 7 is a schematic structural diagram of a device for testing ac copper consumption and iron consumption of a motor according to an embodiment of the present invention, including a method for testing ac copper consumption and iron consumption of a motor according to any one of the above aspects, where the testing device includes:
The magnetic flux density value acquisition module 201 is configured to acquire magnetic flux density values of the first silicon steel and the second silicon steel under the same relative magnetic permeability;
The iron loss phase difference multiple value obtaining module 202 is configured to obtain an iron loss phase difference multiple value of the first motor and the second motor according to the magnetic density value;
an excitation current value obtaining module 203, configured to obtain an excitation current value according to the magnetic density value;
A first preset rotation speed obtaining module 204, configured to obtain a first preset rotation speed of the first motor and a first preset rotation speed of the second motor;
a total loss obtaining module 205, configured to determine a first total loss of the first motor and a second total loss of the second motor according to a first preset rotation speed and an exciting current value;
the loss acquisition module 206 is configured to acquire a first bearing loss, a first wind friction loss, a first direct current copper loss, a second bearing loss, a second wind friction loss, and a second direct current copper loss of the first motor;
An ac copper loss and iron loss sum value obtaining module 207, configured to obtain a first ac copper loss and iron loss sum value of the first motor according to the first total loss, the first bearing loss, the first wind friction loss, and the first dc copper loss, and obtain a second ac copper loss and iron loss sum value of the second motor according to the second total loss, the second bearing loss, the second wind friction loss, and the second dc copper loss;
The ac copper consumption value and iron consumption value obtaining module 208 is configured to obtain a first ac copper consumption value, a first iron consumption value, and a second ac copper consumption value and a second iron consumption value of the first motor according to the first ac copper consumption and iron consumption sum value, the second ac copper consumption and iron consumption sum value, and the iron consumption difference multiple value, respectively.
It should be noted that, since the test device for ac copper loss and iron loss of a motor provided in this embodiment includes any of the test methods for ac copper loss and iron loss of a motor provided in the embodiments of the present invention, the test methods for ac copper loss and iron loss of a motor have the same or corresponding beneficial effects, and are not described herein.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and fig. 8 is a schematic structural diagram of an electronic device 10 that may be used to implement an embodiment of the present invention. The electronic device 10 is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 8, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the Random Access Memory (RAM) 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, read Only Memory (ROM) 12 and Random Access Memory (RAM) 13 are connected to each other by a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
The various components in the electronic device 10 are connected to an input/output (I/O) interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as the motor ac copper and iron loss test methods.
In some embodiments, the method of testing motor ac copper and iron losses may be implemented as a computer program tangibly embodied on a computer readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via Read Only Memory (ROM) 12 and/or communication unit 19. When the computer program is loaded into Random Access Memory (RAM) 13 and executed by processor 11, one or more steps of the above-described motor ac copper and iron loss testing method may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the motor ac copper and iron loss test method in any other suitable manner (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on 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.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. The testing device for the alternating current copper loss and the iron loss of the motor at least comprises a first motor and a second motor, wherein the first motor comprises first silicon steel, the second motor comprises second silicon steel, and the materials of the first silicon steel and the second silicon steel are different; the testing method is characterized by comprising the following steps:
obtaining the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability;
obtaining the iron loss phase difference multiple value of the first motor and the second motor according to the magnetic density value;
Acquiring an excitation current value according to the magnetic density value;
Acquiring first preset rotating speeds of the first motor and the second motor;
determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value;
Acquiring first bearing loss, first wind friction loss and first direct current copper loss of the first motor and second bearing loss, second wind friction loss and second direct current copper loss of the second motor;
Obtaining a first alternating current copper loss and iron loss sum value of the first motor according to the first total loss, the first bearing loss, the first wind friction loss and the first direct current copper loss, and obtaining a second alternating current copper loss and iron loss sum value of the second motor according to the second total loss, the second bearing loss, the second wind friction loss and the second direct current copper loss;
and respectively obtaining a first alternating current copper consumption value, a first iron consumption value, a second alternating current copper consumption value and a second iron consumption value of the first motor according to the sum value of the first alternating current copper consumption and the iron consumption, the sum value of the second alternating current copper consumption and the iron consumption and the phase difference multiple value.
2. The method for testing ac copper and iron loss of a motor according to claim 1, further comprising, before obtaining the magnetic density values of the first silicon steel and the second silicon steel at the same relative permeability:
Establishing a motor electromagnetic model, and obtaining a preset no-load air gap flux density;
acquiring the actual empty-load air gap flux density of the first motor or the second motor;
and acquiring an electromagnetic correction model of the motor according to the preset empty air gap flux density and the actual empty air gap flux density.
3. The method for testing ac copper and iron loss of a motor according to claim 1, wherein obtaining the magnetic density values of the first silicon steel and the second silicon steel at the same relative permeability comprises:
Acquiring a first curve of the first silicon steel and a second curve of the second silicon steel under the same coordinate system according to the first silicon steel and the second silicon steel, wherein the abscissa of the coordinate system is relative magnetic permeability, and the ordinate is magnetic density;
And obtaining the magnetic density values of the first silicon steel and the second silicon steel under the same relative magnetic permeability according to the first curve and the second curve.
4. The method for testing ac copper consumption and iron loss of a motor according to claim 2, wherein obtaining the value of the difference between the iron losses of the first motor and the second motor according to the magnetic density value comprises:
Acquiring a second preset rotating speed;
Acquiring an electric frequency according to the second preset rotating speed; acquiring a first sub-iron loss value of the first silicon steel and a second sub-iron loss value of the second silicon steel according to the magnetic density value and the electric frequency;
and obtaining the iron loss difference multiple value of the first motor and the second motor according to the first iron loss value and the second iron loss value.
5. The method for testing ac copper and iron loss of a motor according to claim 4, wherein obtaining an electrical frequency according to the second preset rotational speed comprises:
obtaining pole pair numbers of the first motor and the second motor;
and acquiring an electric frequency according to the pole pair number and the second preset rotating speed.
6. The method of testing ac copper and iron losses of a motor according to claim 1, wherein obtaining a first ac copper and iron loss sum value of the first motor from the first total loss, the first bearing loss, the first wind friction loss, and the first dc copper loss and obtaining a second ac copper and iron loss sum value of the second motor from the second total loss, the second bearing loss, the second wind friction loss, and the second dc copper loss comprises:
Obtaining a first loss value according to the first bearing loss, the first wind friction loss and the first direct current copper loss, and obtaining a second loss value according to the second bearing loss, the second wind friction loss and the second direct current copper loss;
And obtaining a first total copper loss and iron loss sum value according to the first total loss value and the first loss value, and obtaining a second total copper loss and iron loss sum value according to the second total loss value and the second loss value.
7. The method of claim 1, wherein the first ac copper loss value and the second ac copper loss value are the same.
8. A test device for ac copper and iron loss of a motor, comprising the test method for ac copper and iron loss of a motor according to any one of claims 1 to 7, the test device comprising:
the magnetic density value acquisition module is used for acquiring the magnetic density value of the first silicon steel and the second silicon steel under the same relative magnetic permeability;
The iron loss phase difference multiple value acquisition module is used for acquiring the iron loss phase difference multiple values of the first motor and the second motor according to the magnetic density value;
the excitation current value acquisition module is used for acquiring an excitation current value according to the magnetic flux density value;
The first preset rotating speed acquisition module is used for acquiring first preset rotating speeds of the first motor and the second motor;
The total loss acquisition module is used for determining a first total loss of the first motor and a second total loss of the second motor according to the first preset rotating speed and the exciting current value;
The loss acquisition module is used for acquiring the first bearing loss, the first wind friction loss and the first direct current copper loss of the first motor and the second bearing loss, the second wind friction loss and the second direct current copper loss of the second motor;
An ac copper loss and iron loss sum obtaining module configured to obtain a first ac copper loss and iron loss sum of the first motor according to the first total loss, the first bearing loss, the first wind friction loss, and the first dc copper loss, and obtain a second ac copper loss and iron loss sum of the second motor according to the second total loss, the second bearing loss, the second wind friction loss, and the second dc copper loss;
And the alternating current copper consumption value and iron consumption value acquisition module is used for respectively acquiring a first alternating current copper consumption value, a first iron consumption value, a second alternating current copper consumption value and a second iron consumption value of the first motor according to the first alternating current copper consumption and iron consumption sum value, the second alternating current copper consumption and iron consumption sum value and the phase difference multiple value.
9. An electronic device, the electronic device comprising:
At least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of testing copper and iron loss in motor ac according to any one of claims 1-7.
10. A computer readable storage medium storing computer instructions for causing a processor to perform the method of testing the ac copper and iron losses of a motor according to any one of claims 1 to 7.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118501694A (en) * | 2024-07-18 | 2024-08-16 | 潍柴动力股份有限公司 | Method and device for determining iron loss coefficient of motor |
| CN118504297A (en) * | 2024-07-18 | 2024-08-16 | 潍柴动力股份有限公司 | Electromagnetic simulation model correction method and device, storage medium and electronic equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118501694A (en) * | 2024-07-18 | 2024-08-16 | 潍柴动力股份有限公司 | Method and device for determining iron loss coefficient of motor |
| CN118504297A (en) * | 2024-07-18 | 2024-08-16 | 潍柴动力股份有限公司 | Electromagnetic simulation model correction method and device, storage medium and electronic equipment |
| CN118504297B (en) * | 2024-07-18 | 2024-10-22 | 潍柴动力股份有限公司 | Electromagnetic simulation model correction method and device, storage medium and electronic equipment |
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