CN118504297B

CN118504297B - Electromagnetic simulation model correction method and device, storage medium and electronic equipment

Info

Publication number: CN118504297B
Application number: CN202410965587.3A
Authority: CN
Inventors: 王迎波; 崔荣高; 高文进; 秦顺顺
Original assignee: Weichai New Energy Power Technology Co ltd; Weichai Power Co Ltd
Current assignee: Weichai New Energy Power Technology Co ltd; Weichai Power Co Ltd
Priority date: 2024-07-18
Filing date: 2024-07-18
Publication date: 2024-10-22
Anticipated expiration: 2044-07-18
Also published as: CN118504297A

Abstract

The invention provides an electromagnetic simulation model correction method, an electromagnetic simulation model correction device, a storage medium and electronic equipment, which are used for measuring and analyzing no-load friction loss, mechanical theoretical loss of a bearing, direct current copper loss and alternating current copper loss of a motor. And the wind friction loss and the actual mechanical loss of the bearing of the motor are obtained by using the no-load friction loss. And calculating hysteresis loss by utilizing the theoretical loss of the bearing machinery and the actual loss of the bearing machinery, and calculating eddy current loss by combining other losses. And obtaining the iron loss actual measurement value of the motor through hysteresis loss and eddy current loss. And carrying out preliminary correction on the electromagnetic simulation model by using wind friction loss, bearing mechanical theoretical loss, direct current copper loss and alternating current copper loss to obtain corrected iron loss simulation value. And comparing the iron loss actual measurement value with the iron loss simulation value, and further correcting the iron loss coefficient of the model according to the error until the error is within a preset range. According to the invention, through accurate loss analysis and model correction, the simulation precision of the electromagnetic simulation model is effectively improved.

Description

Electromagnetic simulation model correction method and device, storage medium and electronic equipment

Technical Field

The present invention relates to the field of motor technologies, and in particular, to a method and apparatus for correcting an electromagnetic simulation model, a storage medium, and an electronic device.

Background

Motors play a central role in daily life and industrial production, and efficient operation thereof is a key to achieving the goal of carbon neutralization. The improvement of the motor efficiency is not only beneficial to saving energy, but also increases economic benefit. However, a significant challenge in motor design and development is accurately calculating and predicting motor losses of all types, particularly ac copper and iron losses. The complexity of these losses often makes its prediction accuracy unattainable for accurate design.

Although various motor test and simulation platforms, such as a variable frequency adjustment mechanism, an actual measurement track and track sensitivity correction method, a motor simulation system and the like, have been developed in the prior art, the techniques are mainly focused on improving the efficiency and precision of test and simulation, and do not deeply study how to accurately analyze and position various losses in a motor, nor provide an effective quantitative analysis method.

Therefore, how to improve the simulation precision of the electromagnetic simulation model of the motor becomes a technical problem which needs to be solved by the technicians in the field.

Disclosure of Invention

In view of the above problems, the present invention provides a method, an apparatus, a storage medium, and an electronic device for correcting an electromagnetic simulation model, which overcome or at least partially solve the above problems, and the technical solution is as follows:

An electromagnetic simulation model correction method, comprising:

obtaining no-load friction loss, mechanical theoretical loss of a bearing, direct-current copper loss and alternating-current copper loss of the motor;

obtaining wind friction loss and bearing mechanical actual loss of the motor by using the no-load friction loss;

obtaining hysteresis loss of the motor by utilizing the theoretical loss of the bearing machinery and the actual loss of the bearing machinery;

Obtaining eddy current loss of the motor by using at least the wind friction loss, the mechanical theoretical loss of the bearing, the direct current copper loss, the alternating current copper loss and the hysteresis loss;

obtaining an actual measurement value of the iron loss of the motor by utilizing the hysteresis loss and the eddy current loss;

Correcting an electromagnetic simulation model of the motor by using the wind friction loss, the mechanical theoretical loss of the bearing, the direct current copper loss and the alternating current copper loss to obtain an iron loss simulation value output by the corrected electromagnetic simulation model;

And correcting the iron loss coefficient of the electromagnetic simulation model according to the error between the iron loss actual measurement value and the iron loss simulation value until the error between the iron loss simulation value and the iron loss actual measurement value output by the electromagnetic simulation model is within a preset range.

Optionally, the obtaining the no-load friction loss, the mechanical theoretical loss of the bearing, the direct current copper loss and the alternating current copper loss of the motor includes:

Obtaining the no-load friction loss actually measured by the motor at different rotating speeds;

Obtaining bearing mechanical structure data, running current, direct current line resistance and alternating current line resistance of the motor;

Obtaining the mechanical theoretical loss of the bearing of the motor by utilizing the mechanical structure data of the bearing;

And obtaining the direct-current copper loss and the alternating-current copper loss of the motor by using the running current, the direct-current line resistor and the alternating-current line resistor.

Optionally, the obtaining wind friction loss and bearing mechanical actual loss of the motor by using the no-load friction loss includes:

and performing polynomial fitting on the no-load friction loss to obtain the wind friction loss and the actual mechanical loss of the bearing of the motor.

Optionally, the obtaining process of the direct current line resistance and the alternating current line resistance includes:

Obtaining the highest rotating speed and the pole pair number of the motor;

Obtaining the alternating current highest frequency of the motor by utilizing the highest rotating speed and the pole pair number;

And testing the direct current line resistance of the motor at the actual running temperature by using motor resistance testing equipment, and testing the alternating current line resistance of the motor at different appointed frequencies, wherein the appointed frequency is smaller than or equal to the highest alternating current frequency.

Optionally, the obtaining the direct current copper consumption and the alternating current copper consumption of the motor by using the running current, the direct current line resistance and the alternating current line resistance includes:

Obtaining direct-current copper consumption of the motor by using the running current, the direct-current line resistance and a preset direct-current line coefficient;

And obtaining the alternating current copper loss of the motor by using the running current, the alternating current line resistance and a preset alternating current line coefficient.

Optionally, the bearing mechanical structure data includes rotor system quality, bearing inner diameter, bearing outer diameter and bearing number of the motor, and the obtaining the bearing mechanical theoretical loss of the motor by using the bearing mechanical structure data includes:

obtaining an average bearing load of the motor by using the rotor train mass and the number of bearings;

obtaining a bearing average diameter of the motor by utilizing the bearing inner diameter and the bearing outer diameter;

And obtaining the mechanical theoretical loss of the bearing of the motor by using the average load of the bearing, the average diameter of the bearing and the angular speed of the motor.

Optionally, said obtaining eddy current loss of said motor using at least said wind friction loss, said bearing mechanical theoretical loss, said direct current copper loss, said alternating current copper loss, and said hysteresis loss comprises:

Obtaining a net output power of the motor;

and obtaining the eddy current loss of the motor by using the net output power, the wind friction loss, the mechanical theoretical loss of the bearing, the direct current copper loss, the alternating current copper loss and the hysteresis loss.

An electromagnetic simulation model correction apparatus comprising: a first loss obtaining unit, a second loss obtaining unit, a third loss obtaining unit, a fourth loss obtaining unit, an actual iron loss obtaining unit, an iron loss simulation value obtaining unit and an iron loss coefficient correcting unit,

The first loss obtaining unit is used for obtaining no-load friction loss, mechanical theoretical loss of a bearing, direct current copper loss and alternating current copper loss of the motor;

the second loss obtaining unit is used for obtaining wind friction loss and bearing mechanical actual loss of the motor by using the no-load friction loss;

The third loss obtaining unit is configured to obtain hysteresis loss of the motor by using the theoretical loss of the bearing machinery and the actual loss of the bearing machinery;

The fourth loss obtaining unit is configured to obtain eddy current loss of the motor using at least the wind friction loss, the mechanical theoretical loss of the bearing, the direct current copper loss, the alternating current copper loss, and the hysteresis loss;

the iron loss actual measurement value obtaining unit is used for obtaining an iron loss actual measurement value of the motor by utilizing the hysteresis loss and the eddy current loss;

the iron loss simulation value obtaining unit is used for correcting an electromagnetic simulation model of the motor by using the wind friction loss, the mechanical theoretical loss of the bearing, the direct current copper loss and the alternating current copper loss to obtain an iron loss simulation value output by the corrected electromagnetic simulation model;

the iron loss coefficient correction unit is used for correcting the iron loss coefficient of the electromagnetic simulation model according to the error between the iron loss actual measurement value and the iron loss simulation value until the error between the iron loss simulation value and the iron loss actual measurement value output by the electromagnetic simulation model is within a preset range.

A computer-readable storage medium having stored thereon a program which, when executed by a processor, implements the electromagnetic simulation model correction method of any one of the above.

An electronic device comprising at least one processor, and at least one memory, bus connected to the processor; the processor and the memory complete communication with each other through the bus; the processor is configured to invoke the program instructions in the memory to perform the electromagnetic simulation model correction method of any of the above.

By means of the technical scheme, the electromagnetic simulation model correction method, the electromagnetic simulation model correction device, the storage medium and the electronic equipment provided by the invention are used for obtaining no-load friction loss, mechanical theoretical loss of a bearing, direct current copper loss and alternating current copper loss of a motor; the wind friction loss and the actual mechanical loss of the bearing of the motor are obtained by using no-load friction loss; the hysteresis loss of the motor is obtained by utilizing the theoretical loss of the bearing machinery and the actual loss of the bearing machinery; the eddy current loss of the motor is obtained at least by using wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss, alternating current copper loss and hysteresis loss; obtaining an actual measurement value of the iron loss of the motor by using hysteresis loss and eddy current loss; correcting an electromagnetic simulation model of the motor by using wind friction loss, bearing mechanical theoretical loss, direct current copper loss and alternating current copper loss to obtain an iron loss simulation value output by the corrected electromagnetic simulation model; and correcting the iron loss coefficient of the electromagnetic simulation model according to the error between the iron loss actual measurement value and the iron loss simulation value until the error between the iron loss simulation value and the iron loss actual measurement value output by the electromagnetic simulation model is within a preset range. The method comprises the steps of identifying and splitting easily-determined loss parts, correcting an electromagnetic simulation model, starting from an actual measurement value of the iron loss of the motor, and correcting the iron loss coefficient of the electromagnetic simulation model by combining the iron loss simulation value output by the corrected electromagnetic simulation model, so that the simulation precision of the electromagnetic simulation model is improved, and the design and operation efficiency of the motor are optimized.

The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic flow chart of an electromagnetic simulation model correction method according to an embodiment of the present invention;

Fig. 2 is a schematic flow chart of a specific implementation manner of step S100 in the electromagnetic simulation model correction method according to the embodiment of the present invention;

Fig. 3 is a schematic flow chart of a process for obtaining a dc line resistor and an ac line resistor according to an embodiment of the present invention;

Fig. 4 shows a schematic structural diagram of an electromagnetic simulation model correction device according to an embodiment of the present invention;

Fig. 5 shows a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

As a core component in daily life and industrial production, efficient operation of the motor plays a vital role in achieving the carbon neutralization objective. The improvement of the motor efficiency is directly related to the energy conservation and the increase of economic benefits. However, one of the major challenges in motor design and development is accurately calculating and predicting various losses of a motor, particularly ac copper and iron losses, which are complex, so that the prediction accuracy of the motor is often difficult to meet the requirement of accurate design.

Among motor losses, direct current copper loss, alternating current copper loss, hysteresis loss, eddy current loss, bearing mechanical loss, wind friction loss, and the like are key factors affecting motor efficiency. The precise splitting and calculation of these losses is a difficulty in motor design because they involve complex physical processes and electrical characteristics. Based on the diversity and complexity of the loss types, the field of motor design is urgent to develop new technologies and methods to realize accurate calculation and prediction of various losses in the motor, so that the accuracy and efficiency of motor design are improved, and the ever-increasing energy conservation and emission reduction requirements are met.

Based on this, the embodiment of the invention provides an electromagnetic simulation model correction method, firstly, the friction loss of a motor in an idle state is measured and recorded, and the mechanical loss of a bearing is obtained through theoretical calculation. And simultaneously, measuring the direct current copper loss and the alternating current copper loss of the motor. Then, the wind friction loss and the actual loss of the bearing machinery are separated by a proper analysis method by using the no-load friction loss data. Then, by comparing the mechanical theoretical loss and the actual loss of the bearing, the hysteresis loss of the motor is calculated. And then, the eddy current loss of the motor is calculated by combining wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss, alternating current copper loss and hysteresis loss. And determining an actual iron loss value of the motor by using the hysteresis loss and the eddy current loss. And correcting the electromagnetic simulation model of the motor by using wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss and alternating current copper loss to obtain an iron loss simulation value output by the corrected model. And comparing the iron loss actual measurement value with the iron loss simulation value output by the simulation model, and adjusting the iron loss coefficient of the electromagnetic simulation model according to the error between the iron loss actual measurement value and the iron loss simulation value. And repeating the process until the errors of the iron loss simulation value and the actual measurement value output by the simulation model reach the preset precision requirement.

As shown in fig. 1, a flowchart of an implementation manner of an electromagnetic simulation model correction method provided by an embodiment of the present invention may include:

S100, obtaining no-load friction loss, mechanical theoretical loss of a bearing, direct-current copper loss and alternating-current copper loss of the motor.

The No-load friction loss (No-load Friction Losses) refers to energy loss caused by mechanical factors such as bearing friction, wind resistance, brush friction and the like when the motor is not loaded (i.e. No-load operation). The embodiment of the invention can measure the no-load friction loss under the condition that the motor is not loaded (i.e. in an no-load state). Specifically, the embodiment of the invention can obtain no-load friction loss by measuring the input power (voltage and current) of the motor and subtracting the no-load loss inside the motor.

The mechanical theoretical loss of the bearing refers to energy loss generated by friction and movement between mechanical parts during operation of the motor. According to the embodiment of the invention, the mechanical theoretical loss of the bearing can be calculated according to the mechanical structure data of the motor bearing.

In the direct current Copper Loss (DC Copper Loss), the energy Loss due to the resistance when the current passes through the Copper wire (wire) in the direct current circuit of the motor. The embodiment of the invention can calculate the direct current copper loss by measuring or knowing the current and the resistance in the direct current circuit of the motor.

In which alternating current Copper Loss (AC Copper Loss) refers to energy Loss due to resistance and skin effect when current passes through Copper wires in an alternating current circuit of a motor. The embodiment of the invention can calculate the alternating current copper loss by measuring or knowing the current and the resistance in the alternating current circuit of the motor.

S110, obtaining wind friction loss and bearing mechanical actual loss of the motor by using no-load friction loss.

The wind friction loss (Windage Loss) refers to the loss generated by friction between a rotating component (such as a rotor) of the motor and the surrounding air. When the motor rotates at high speed, air resistance causes energy loss. According to the embodiment of the invention, the difference value between the output power and the input power of the motor can be directly measured at a specific rotating speed to estimate the wind friction loss.

The actual loss of the bearing machinery refers to energy loss caused by insufficient friction and lubrication of the motor bearing. The bearings may generate friction when supporting and guiding the rotating shaft, which may result in the conversion of energy into thermal energy, thereby generating losses.

Specifically, the embodiment of the invention can separate the wind friction loss and the actual mechanical loss of the bearing of the motor from the no-load friction loss through software simulation. The embodiment of the invention can separate the wind friction loss from the actual loss of the bearing machinery in the space-borne friction loss by changing the running condition (such as the rotating speed) of the motor or using a specific testing device. For example: in experiments, by measuring the no-load friction loss at different rotational speeds, it is possible to obtain a variation of the no-load friction loss with a variation of the rotational speed. Wind friction is generally proportional to the square or cube of the rotational speed, while the actual loss of the bearing machinery may vary with the rotational speed. Experimental data is analyzed using statistical methods or data models to fit the empty model losses to a model that can describe the change in wind friction losses and actual loss of the bearing machinery with rotational speed or other variables.

S120, hysteresis loss of the motor is obtained by utilizing theoretical loss of the bearing machinery and actual loss of the bearing machinery.

The hysteresis loss (HYSTERESIS LOSS) refers to the energy loss of the motor during operation due to the magnetization of the magnetic material (usually a core) in an alternating magnetic field. The embodiment of the invention can calculate the difference between the actual loss of the bearing machinery and the theoretical loss of the bearing machinery, and confirm the difference as the hysteresis loss of the motor.

S130, at least utilizing wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss, alternating current copper loss and hysteresis loss to obtain eddy current loss of the motor.

The eddy current loss (Eddy Current Loss) refers to the energy loss of the motor due to the flow of induced current (eddy current) in the core material caused by the change of magnetic flux in the motor core. The embodiment of the invention can be based on the test result of the motor in the bench efficiency test, wherein the test result can comprise the rotating speed, the torque and the efficiency of the motor in the test, and the eddy current loss of the motor is obtained by calculating by combining the measured data comprising wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss, alternating current copper loss and hysteresis loss.

Optionally, on the basis of the one or more embodiments corresponding to fig. 1, in another optional embodiment provided in the present invention, at least wind friction loss, mechanical theoretical loss of a bearing, direct current copper loss, alternating current copper loss and hysteresis loss are used to obtain eddy current loss of a motor, which may specifically include:

A net output power of the motor is obtained. The eddy current loss of the motor is obtained by utilizing the net output power, wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss, alternating current copper loss and hysteresis loss.

Specifically, the embodiment of the invention can obtain the net output power of the motor according to the rotation speed, the torque and the efficiency coefficient of the motor.

Alternatively, the net output power may be equal to the difference between the actual output power of the motor and the theoretical output power.

According to the embodiment of the invention, the actual output power of the motor can be calculated according to the rotating speed, the torque and the efficiency coefficient of the motor, wherein the efficiency coefficient can be obtained according to the motor in a bench efficiency test. For example: according to the embodiment of the invention, the actual output power of the motor can be obtained by multiplying the rotating speed and the torque of the motor, multiplying the rotating speed and the torque by the inverse of the efficiency coefficient and dividing the multiplied product by the power conversion constant.

According to the embodiment of the invention, the theoretical output power of the motor can be calculated according to the rotating speed and the torque of the motor. For example: the embodiment of the invention can multiply the rotating speed and the torque of the motor and then divide the multiplied rotating speed and the torque by the power conversion constant to obtain the theoretical output power of the motor.

Alternatively, the power conversion constant provided by the embodiment of the present invention may be 9550.

Alternatively, the embodiment of the invention can obtain the eddy current loss of the motor by utilizing the result of adding the net output power to minus the wind friction loss, the mechanical theoretical loss of the bearing, the direct current copper loss, the alternating current copper loss and the hysteresis loss.

Alternatively, the embodiment of the invention can obtain the eddy current loss of the motor by utilizing the result of weighted summation among the net output power minus wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss, alternating current copper loss and hysteresis loss.

According to the embodiment of the invention, the net output power of the motor is obtained, and the net output power is used for calculating the wind friction loss, the mechanical theoretical loss of the bearing, the direct current copper loss, the alternating current copper loss and the hysteresis loss which are actually measured by the motor, so that the eddy current loss of the motor can be rapidly and accurately calculated, and the follow-up accurate correction of the electromagnetic simulation model is facilitated.

S140, obtaining an actual measurement value of the iron loss of the motor by using the hysteresis loss and the eddy current loss.

Hysteresis Loss and eddy current Loss are generally referred to as Iron Loss (ironloss). The embodiment of the invention can add hysteresis loss and eddy current loss to calculate the actual measurement value of the iron loss.

And S150, correcting the electromagnetic simulation model of the motor by using wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss and alternating current copper loss to obtain an iron loss simulation value output by the corrected electromagnetic simulation model.

The electromagnetic simulation model is a calculation model which is specially used for simulating and analyzing the electromagnetic field behaviors inside the motor.

According to the embodiment of the invention, corresponding loss item parameters in an electromagnetic simulation model of the motor can be adjusted and corrected according to the wind friction loss, the mechanical theoretical loss of the bearing, the direct current copper loss and the alternating current copper loss which are actually measured by the motor, so that the loss item parameters in the electromagnetic simulation model are consistent with the measured data of the motor, and the simulation precision of the electromagnetic simulation data is ensured. The embodiment of the invention can run the corrected electromagnetic simulation model to obtain the iron loss simulation value of the motor calculated by the electromagnetic simulation model simulation during the electromagnetic simulation of the motor.

And S160, correcting the iron loss coefficient of the electromagnetic simulation model according to the error between the iron loss actual measurement value and the iron loss simulation value until the error between the iron loss simulation value and the iron loss actual measurement value output by the electromagnetic simulation model is within a preset range.

When electromagnetic simulation of a motor is performed, in order to more accurately reflect the influence of an actual manufacturing process on the performance of the motor, a correction coefficient is generally introduced on the basis of a theoretical calculated iron loss: iron loss coefficient. The core loss factor takes into account possible deviations in the manufacturing process, such as material non-uniformity, machining accuracy, etc., which may cause the actual core loss to differ from the theoretical calculated value. By multiplying the iron loss coefficient, the iron loss in the simulation model can be adjusted to be more similar to the running condition of an actual motor, so that the accuracy and the reliability of the simulation result are improved.

Specifically, the embodiment of the invention can calculate the error between the actual measured iron loss value and the actual iron loss value, and aims to reduce the error, and continuously correct the iron loss coefficient of the electromagnetic simulation model until the error between the actual iron loss value and the actual iron loss value output by the electromagnetic simulation model is within a preset range.

The preset range can be determined according to the required accuracy of the electromagnetic simulation model.

According to the electromagnetic simulation model correction method provided by the invention, no-load friction loss, mechanical theoretical loss of a bearing, direct-current copper loss and alternating-current copper loss of a motor are obtained; the wind friction loss and the actual mechanical loss of the bearing of the motor are obtained by using no-load friction loss; the hysteresis loss of the motor is obtained by utilizing the theoretical loss of the bearing machinery and the actual loss of the bearing machinery; the eddy current loss of the motor is obtained by using wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss, alternating current copper loss and hysteresis loss; obtaining an actual measurement value of the iron loss of the motor by using hysteresis loss and eddy current loss; correcting an electromagnetic simulation model of the motor by using wind friction loss, bearing mechanical theoretical loss, direct current copper loss and alternating current copper loss to obtain an iron loss simulation value output by the corrected electromagnetic simulation model; and correcting the iron loss coefficient of the electromagnetic simulation model according to the error between the iron loss actual measurement value and the iron loss simulation value until the error between the iron loss simulation value and the iron loss actual measurement value output by the electromagnetic simulation model is within a preset range. The method comprises the steps of identifying and splitting easily-determined loss parts, correcting an electromagnetic simulation model, starting from an actual measurement value of the iron loss of the motor, and correcting the iron loss coefficient of the electromagnetic simulation model by combining the iron loss simulation value output by the corrected electromagnetic simulation model, so that the simulation precision of the electromagnetic simulation model is improved, and the design and operation efficiency of the motor are optimized.

Optionally, based on the method shown in fig. 1, as shown in fig. 2, in the method for correcting an electromagnetic simulation model according to the embodiment of the present invention, the step S100 may include:

s200, obtaining the no-load friction loss actually measured by the motor at different rotating speeds.

Specifically, the embodiment of the invention can place the motor in an idle state, namely, no load is connected. Ensuring that the motor is not affected by external loads during testing. The voltage, current and rotational speed are then measured and recorded while the motor is running. The rotational speed of the motor is changed stepwise, starting from the lowest rotational speed, and is increased stepwise to the highest rotational speed. At each rotational speed point, the motor is kept running steadily for a period of time. The input power of the motor at each rotational speed point is recorded. The known or estimated iron losses are subtracted from the input power at each speed point to obtain the measured no-load friction losses of the motor at different speeds.

And S210, acquiring bearing mechanical structure data, running current, direct current line resistance and alternating current line resistance of the motor.

The mechanical structure data of the bearing refer to detailed technical parameters and design information related to the motor bearing. The bearing mechanical structure data may include rotor train mass, bearing inner diameter, bearing outer diameter, and number of bearings of the motor.

The running current is the current in the whole running condition of the motor. I.e. the current through the motor in all possible operating states and load conditions thereof. The embodiment of the invention can collect the running current of the motor through the current measuring equipment, and can monitor and record the running current of the motor through the motor controller.

The direct current line resistance refers to the resistance value of the motor winding under direct current.

The alternating current line resistance refers to the equivalent resistance of the motor winding under alternating current.

The embodiment of the invention can use a motor resistance test instrument to measure the direct current line resistance of the motor at the actual running temperature and the alternating current line resistance at different frequencies.

S220, obtaining the mechanical theoretical loss of the bearing of the motor by using the mechanical structure data of the bearing.

According to the embodiment of the invention, the mechanical theoretical loss of the bearing of the motor can be calculated according to the rotor system quality, the bearing inner diameter, the bearing outer diameter and the bearing number of the motor.

Optionally, on the basis of the above one or more embodiments corresponding to fig. 2, in another optional embodiment provided by the embodiment of the present invention, obtaining the mechanical theoretical loss of the bearing of the motor by using the mechanical structure data of the bearing may specifically include:

And obtaining the average load of the bearings of the motor by using the mass of the rotor system and the number of the bearings.

And obtaining the average diameter of the bearing of the motor by using the inner diameter and the outer diameter of the bearing.

The average load of the bearings refers to the average load that each bearing in the rotor system of the motor needs to bear. Specifically, the embodiment of the invention can calculate the product of the mass of the rotor system and the gravity acceleration, and divide the product by the number of the bearings to obtain the average load of the bearings.

Wherein, the average diameter of the bearing refers to the average value of the inner diameter and the outer diameter of the bearing of the motor. Specifically, the embodiment of the invention can calculate the average value of the inner diameter of the bearing and the average value of the outer diameter of the bearing, and confirm the sum of the two average values as the average diameter of the bearing of the motor.

Where the angular speed of the motor refers to the speed at which the motor rotor rotates, typically expressed in radians of rotation per second (rad/s). Specifically, according to the embodiment of the invention, the rotational speed of the motor can be multiplied by 2 pi and then divided by 60 to obtain the angular speed of the motor.

Alternatively, the embodiment of the invention can calculate the ratio of the average load of the bearing to the average diameter of the bearing, and multiply the ratio by the angular speed of the motor to obtain the mechanical theoretical loss of the bearing of the motor.

Optionally, the embodiment of the invention can calculate the product of the average bearing load and the preset bearing load coefficient, calculate the ratio of the product to the average bearing diameter, multiply the ratio by the angular speed of the motor, multiply the calculation result by the unit conversion coefficient to obtain the mechanical theoretical loss of the bearing of the motor, wherein the preset bearing load coefficient can be obtained in the bench test of the motor. Alternatively, the preset bearing load factor may be 0.15. The unit conversion factor may be to the power of 10-5.

According to the embodiment of the invention, the average load and the average diameter of the bearings of the motor are accurately calculated through the mass of the rotor system, the inner diameter of the bearings, the outer diameter of the bearings and the number of the bearings, so that the mechanical theoretical loss of the bearings of the motor is reasonably calculated according to the angular speed of the motor, and reliable data support is provided for obtaining accurate hysteresis loss subsequently.

S230, obtaining direct current copper loss and alternating current copper loss of the motor by using the running current, the direct current line resistor and the alternating current line resistor.

Optionally, on the basis of the one or more embodiments corresponding to fig. 2, in another optional embodiment provided by the embodiment of the present invention, obtaining the direct current copper loss and the alternating current copper loss of the motor by using the running current, the direct current line resistance and the alternating current line resistance may specifically include:

And calculating the direct-current copper consumption of the motor by using the running current and the direct-current line resistance.

Specifically, the embodiment of the invention can calculate the product of the square of the running current and the resistance of the direct current wire to obtain the direct current copper loss of the motor.

According to the embodiment of the invention, the direct-current copper consumption can be rapidly calculated through the running current and the direct-current line resistance, so that the subsequent rapid acquisition of the eddy current loss of the motor is facilitated, and the correction efficiency of the electromagnetic simulation model is improved.

and obtaining the direct-current copper consumption of the motor by using the running current, the direct-current line resistance and the preset direct-current line coefficient.

Specifically, the embodiment of the invention can calculate the square of the running current, the product of the direct current line resistance and the preset direct current line coefficient, and obtain the direct current copper loss of the motor.

The preset DC line coefficient can be obtained through bench test of the motor. Alternatively, the preset dc line coefficient may be 1.5.

According to the embodiment of the invention, the running current and the direct current line resistance are calculated by combining the preset direct current line coefficient, so that the direct current copper loss which is more close to the motor in practical application can be obtained, and reliable data support is provided for the accurate calculation of the eddy current loss of the subsequent motor.

and calculating the alternating current copper loss of the motor by using the running current and the alternating current line resistance.

Specifically, the embodiment of the invention can calculate the product of the square of the running current and the resistance of the alternating current line to obtain the alternating current copper loss of the motor.

According to the embodiment of the invention, the AC copper loss can be rapidly calculated through the running current and the AC line resistance, so that the subsequent rapid acquisition of the eddy current loss of the motor is facilitated, and the correction efficiency of the electromagnetic simulation model is improved.

And obtaining the alternating current copper loss of the motor by using the running current, the alternating current line resistance and the preset alternating current line coefficient.

Specifically, the embodiment of the invention can calculate the square of the running current, the product of the alternating current line resistance and the preset alternating current line coefficient, and obtain the alternating current copper loss of the motor.

The preset alternating current line coefficient can be obtained through bench test of the motor. Alternatively, the preset ac line coefficient may be 1.5.

According to the embodiment of the invention, the running current and the alternating current line resistance are calculated by combining the preset alternating current line coefficient, so that alternating current copper loss which is closer to the motor in practical application can be obtained, and reliable data support is provided for the accurate calculation of the eddy current loss of the subsequent motor.

According to the embodiment of the invention, the performance of the motor can be comprehensively evaluated by measuring the running current, the direct current line resistance, the alternating current line resistance, the mechanical structure data of the bearing and the no-load friction loss under different rotating speeds, and the multiple types of losses of the motor can be accurately determined, so that reliable loss data is provided for the follow-up accurate correction electromagnetic simulation model.

Optionally, on the basis of the above one or more embodiments corresponding to fig. 1, in another optional embodiment provided by the embodiment of the present invention, the obtaining the wind friction loss and the bearing mechanical actual loss of the motor by using the no-load friction loss specifically may include:

And performing polynomial fitting on the empty load friction loss to obtain the wind friction loss of the motor and the actual mechanical loss of the bearing.

Specifically, the embodiment of the invention can use a software tool supporting a polynomial fitting function to perform polynomial fitting on the idle friction loss, and separate the wind friction loss of the motor and the actual loss of the bearing machinery from the idle friction loss. According to the embodiment of the invention, wind friction loss and bearing mechanical actual loss in no-load friction loss of the motor can be more accurately separated through polynomial fitting.

Alternatively, the software tools supporting the polynomial fitting function may include the polyfit function of MATLAB, the scientific computing library NumPy of Python and the Fit toolbox of SciPry, origin, and the Fit function of Wolfram Mathematica. For example: according to the embodiment of the invention, no-load friction loss is subjected to polynomial fitting under MATLAB, wherein the numerical value of the 3-degree term is wind friction loss, and the numerical value of the 1-degree term is actual loss of the bearing machinery. According to the embodiment of the invention, the polynomial fitting is carried out on the no-load friction loss of the motor through the software tool supporting the polynomial fitting function, so that the accuracy and the efficiency of fitting can be improved, and the no-load friction loss is accurately separated into wind friction loss and bearing mechanical actual loss.

Optionally, based on the method shown in fig. 2, as shown in fig. 3, a flow chart of a process for obtaining a dc line resistance and an ac line resistance provided in an embodiment of the present invention may specifically include:

S300, obtaining the highest rotating speed and the pole pair number of the motor.

The maximum rotational speed is the maximum rotational speed at which the motor can safely operate, and is typically expressed in revolutions per minute (RPM, revolutions Per Minute).

Where pole pair number refers to the number of pole pairs in the motor. In an ac motor, the poles are created by windings on the motor stator that interact with poles on the rotor to create a rotating magnetic field that drives the motor in rotation. The pole pair number determines the synchronous speed of the motor, i.e. the theoretical speed of the motor in the absence of load.

The embodiment of the invention can calibrate the highest rotating speed and the pole pair number of the motor in advance through experiments when the motor is designed.

S310, obtaining the alternating current highest frequency of the motor by using the highest rotating speed and the pole pair number.

The highest frequency of alternating current refers to the highest frequency of alternating current power supply with which the motor can safely operate.

Specifically, the embodiment of the invention can calculate the product of the highest rotating speed and the pole pair number to obtain the highest alternating current frequency of the motor.

Further, the embodiment of the invention can divide the product of the highest rotation speed and the pole pair number by a unit conversion coefficient (for example, 60) after calculating the product, so as to convert the calculated cycle number per minute into the cycle number per second.

S320, testing the direct current line resistance of the motor at the actual running temperature by using motor resistance testing equipment, and testing the alternating current line resistance of the motor at different appointed frequencies, wherein the appointed frequency is smaller than or equal to the highest alternating current frequency.

The motor resistance testing device is a tool for measuring the resistance of a motor winding. For example: digital multimeters, microohmmeters, and resistance testers.

According to the embodiment of the invention, when the motor reaches the actual running temperature, the direct current resistance of the motor winding is measured by using the direct current resistance test equipment. At different specified frequencies, the ac line resistance of the motor windings is measured. These specified frequencies must be less than or equal to the highest ac frequency at which the motor can safely operate. Through the tests, the direct current line resistance and the alternating current line resistance of the motor can be accurately obtained, so that reliable basis is provided for the subsequent calculation of the direct current copper loss and the alternating current copper loss of the motor, and the calculation accuracy of the direct current copper loss and the alternating current copper loss is improved.

According to the embodiment of the invention, the highest rotating speed and the pole pair number of the motor are obtained, so that the highest alternating current frequency of the motor can be accurately calculated, the alternating current line resistance of the motor can be tested in the safe frequency, and the direct current line resistance of the motor tested at the actual operating temperature is combined, so that a reliable basis can be provided for the subsequent calculation of the direct current copper loss and the alternating current copper loss of the motor, and the reliability of loss data for correcting the electromagnetic simulation model is improved.

Although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous.

It should be understood that the various steps recited in the method embodiments of the present invention may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the invention is not limited in this respect.

Corresponding to the above method embodiment, the embodiment of the present invention further provides an electromagnetic simulation model correction device, whose structure is shown in fig. 4, may include: the first loss obtaining unit 10, the second loss obtaining unit 20, the third loss obtaining unit 30, the fourth loss obtaining unit 40, the iron loss actual measurement value obtaining unit 50, the iron loss simulation value obtaining unit 60, and the iron loss coefficient correcting unit 70.

A first loss obtaining unit 10 for obtaining no-load friction loss, mechanical theoretical loss of the bearing, direct current copper loss and alternating current copper loss of the motor.

A second loss obtaining unit 20 for obtaining wind friction loss of the motor and actual loss of the bearing mechanism by using the no-load friction loss.

A third loss obtaining unit 30 for obtaining hysteresis loss of the motor by using the theoretical loss of the bearing machine and the actual loss of the bearing machine.

A fourth loss obtaining unit 40 for obtaining eddy current loss of the motor using at least wind friction loss, bearing mechanical theoretical loss, direct current copper loss, alternating current copper loss, and hysteresis loss.

And an actual iron loss value obtaining unit 50 for obtaining an actual iron loss value of the motor by using the hysteresis loss and the eddy current loss.

And the iron loss simulation value obtaining unit 60 is configured to correct the electromagnetic simulation model of the motor by using wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss and alternating current copper loss, and obtain an iron loss simulation value output by the corrected electromagnetic simulation model.

And the iron loss coefficient correction unit 70 is configured to correct the iron loss coefficient of the electromagnetic simulation model according to the error between the actual iron loss value and the simulated iron loss value until the error between the simulated iron loss value and the actual iron loss value output by the electromagnetic simulation model is within a preset range.

Alternatively, the first loss obtaining unit 10 may include: a first loss obtaining subunit, a second loss obtaining subunit, a third loss obtaining subunit, and a fourth loss obtaining subunit.

And the first loss obtaining subunit is used for obtaining the idle friction loss actually measured by the motor at different rotating speeds.

The second loss obtaining subunit is used for obtaining bearing mechanical structure data, running current, direct current line resistance and alternating current line resistance of the motor.

And the third loss obtaining subunit is used for obtaining the mechanical theoretical loss of the bearing of the motor by using the mechanical structure data of the bearing.

And the fourth loss obtaining subunit is used for obtaining the direct current copper loss and the alternating current copper loss of the motor by using the running current, the direct current line resistance and the alternating current line resistance.

Alternatively, the second loss obtaining unit 20 may be specifically configured to perform polynomial fitting on the air-borne friction loss to obtain the wind friction loss of the motor and the actual loss of the bearing mechanism.

Optionally, a second loss obtaining subunit, may be specifically configured to obtain a highest rotational speed and a pole pair number of the motor; obtaining the alternating current highest frequency of the motor by utilizing the highest rotating speed and the pole pair number; and using motor resistance test equipment to test the direct current line resistance of the motor at the actual running temperature and test the alternating current line resistance of the motor at different designated frequencies, wherein the designated frequency is smaller than or equal to the highest alternating current frequency.

Optionally, the fourth loss obtaining subunit may be specifically configured to obtain the dc copper loss of the motor by using the running current, the dc line resistance, and the preset dc line coefficient.

Optionally, the fourth loss obtaining subunit may be specifically configured to obtain ac copper loss of the motor by using the running current, the ac line resistance, and a preset ac line coefficient.

Alternatively, the bearing mechanical structure data may include rotor train mass, bearing inner diameter, bearing outer diameter, and number of bearings of the motor.

Alternatively, the third loss obtaining subunit may specifically use the rotor system mass and the number of bearings to obtain the bearing average load of the motor. And obtaining the average diameter of the bearing of the motor by using the inner diameter and the outer diameter of the bearing. And obtaining the mechanical theoretical loss of the bearing of the motor by using the average load of the bearing, the average diameter of the bearing and the angular speed of the motor.

Optionally, the fourth loss obtaining unit 40 may be specifically configured to obtain the net output power of the motor. The eddy current loss of the motor is obtained by utilizing the net output power, wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss, alternating current copper loss and hysteresis loss.

The electromagnetic simulation model correction device provided by the invention obtains no-load friction loss, mechanical theoretical loss of a bearing, direct-current copper loss and alternating-current copper loss of a motor; the wind friction loss and the actual mechanical loss of the bearing of the motor are obtained by using no-load friction loss; the hysteresis loss of the motor is obtained by utilizing the theoretical loss of the bearing machinery and the actual loss of the bearing machinery; the eddy current loss of the motor is obtained at least by using wind friction loss, mechanical theoretical loss of the bearing, direct current copper loss, alternating current copper loss and hysteresis loss; obtaining an actual measurement value of the iron loss of the motor by using hysteresis loss and eddy current loss; correcting an electromagnetic simulation model of the motor by using wind friction loss, bearing mechanical theoretical loss, direct current copper loss and alternating current copper loss to obtain an iron loss simulation value output by the corrected electromagnetic simulation model; and correcting the iron loss coefficient of the electromagnetic simulation model according to the error between the iron loss actual measurement value and the iron loss simulation value until the error between the iron loss simulation value and the iron loss actual measurement value output by the electromagnetic simulation model is within a preset range. The method comprises the steps of identifying and splitting easily-determined loss parts, correcting an electromagnetic simulation model, starting from an actual measurement value of the iron loss of the motor, and correcting the iron loss coefficient of the electromagnetic simulation model by combining the iron loss simulation value output by the corrected electromagnetic simulation model, so that the simulation precision of the electromagnetic simulation model is improved, and the design and operation efficiency of the motor are optimized.

The specific manner in which the individual units perform the operations in relation to the apparatus of the above embodiments has been described in detail in relation to the embodiments of the method and will not be described in detail here.

The electromagnetic simulation model correction apparatus includes a processor and a memory, the first loss obtaining unit 10, the second loss obtaining unit 20, the third loss obtaining unit 30, the fourth loss obtaining unit 40, the actual iron loss value obtaining unit 50, the iron loss simulation value obtaining unit 60, the iron loss coefficient correcting unit 70, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize the corresponding functions.

The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The inner core can be provided with one or more than one, and the no-load friction loss, the mechanical theoretical loss of the bearing, the direct current copper loss and the alternating current copper loss of the motor are measured and analyzed by adjusting the parameters of the inner core. And the wind friction loss and the actual mechanical loss of the bearing of the motor are obtained by using the no-load friction loss. And calculating hysteresis loss by utilizing the theoretical loss of the bearing machinery and the actual loss of the bearing machinery, and calculating eddy current loss by combining other losses. And obtaining the iron loss actual measurement value of the motor through hysteresis loss and eddy current loss. And carrying out preliminary correction on the electromagnetic simulation model by using wind friction loss, bearing mechanical theoretical loss, direct current copper loss and alternating current copper loss to obtain corrected iron loss simulation value. And comparing the iron loss actual measurement value with the iron loss simulation value, and further correcting the iron loss coefficient of the model according to the error until the error is in a preset range, so that the simulation precision of the electromagnetic simulation model is improved through accurate loss analysis and model correction.

Embodiments of the present invention provide a computer-readable storage medium having stored thereon a program that, when executed by a processor, implements an electromagnetic simulation model correction method.

The embodiment of the invention provides a processor, which is used for running a program, wherein the electromagnetic simulation model correction method is executed when the program runs.

As shown in fig. 5, an embodiment of the present invention provides an electronic device 1000, the electronic device 1000 including at least one processor 1001, and at least one memory 1002, bus 1003 connected to the processor 1001; wherein, the processor 1001 and the memory 1002 complete communication with each other through the bus 1003; the processor 1001 is configured to call program instructions in the memory 1002 to perform the electromagnetic simulation model correction method described above. The electronic devices herein may be servers, PCs, PADs, cell phones, ECUs (Electronic Control Unit, electronic controller units), VCUs (Vehicle Control Unit, vehicle controllers), MCUs (Micro Controller Unit, micro-control units), HCUs (Hybrid Control Unit, hybrid control systems), etc.

The invention also provides a computer program product adapted to perform a program initialized with the steps of the electromagnetic simulation model correction method when executed on an electronic device.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, electronic devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In one typical configuration, the electronic device includes one or more processors (CPUs), memory, and a bus. The electronic device may also include input/output interfaces, network interfaces, and the like.

The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip. Memory is an example of a computer-readable medium.

Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

In the description of the present invention, it should be understood that, if the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left" and "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of the description, are not to indicate or imply that the positions or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limitations of the present invention.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are to be included in the scope of the claims of the present invention.

Claims

1. An electromagnetic simulation model correction method, characterized by comprising the following steps:

Correcting the iron loss coefficient of the electromagnetic simulation model according to the error between the actual iron loss value and the iron loss simulation value, and obtaining the iron loss simulation value output by the electromagnetic simulation model after the iron loss coefficient correction, wherein the iron loss coefficient of the electromagnetic simulation model is continuously corrected with the aim of reducing the error until the error between the iron loss simulation value output by the electromagnetic simulation model and the actual iron loss value is within a preset range.

2. The method of claim 1, wherein said obtaining no-load friction losses, bearing mechanical theoretical losses, direct current copper losses, and alternating current copper losses for the motor comprises:

3. The method of claim 2, wherein said using said no-load friction loss to obtain wind friction loss and bearing mechanical actual loss of said motor comprises:

and performing polynomial fitting on the idle friction loss actually measured by the motor at different rotating speeds to obtain the wind friction loss of the motor and the actual loss of the bearing machinery.

4. The method of claim 2, wherein the obtaining of the dc line resistance and the ac line resistance comprises:

Obtaining the highest rotating speed and the pole pair number of the motor;

5. The method of claim 2, wherein said obtaining direct current copper loss and alternating current copper loss of said motor using said operating current, said direct current line resistance, and said alternating current line resistance comprises:

6. The method of claim 2, wherein the bearing mechanical structure data includes rotor train mass, bearing inner diameter, bearing outer diameter, and number of bearings of the motor, and wherein using the bearing mechanical structure data to obtain bearing mechanical theoretical losses of the motor comprises:

7. The method of claim 1, wherein said obtaining eddy current losses of the electric machine using at least the wind friction losses, the bearing mechanical theoretical losses, the direct current copper losses, the alternating current copper losses, and the hysteresis losses comprises:

Obtaining a net output power of the motor;

8. An electromagnetic simulation model correction apparatus, characterized by comprising: a first loss obtaining unit, a second loss obtaining unit, a third loss obtaining unit, a fourth loss obtaining unit, an actual iron loss obtaining unit, an iron loss simulation value obtaining unit and an iron loss coefficient correcting unit,

The iron loss coefficient correction unit is configured to correct an iron loss coefficient of the electromagnetic simulation model according to an error between the actually measured iron loss value and the actually measured iron loss value, obtain the actually simulated iron loss value output by the electromagnetic simulation model after the correction of the iron loss coefficient, and continuously correct the iron loss coefficient of the electromagnetic simulation model with the aim of reducing the error until the error between the actually simulated iron loss value output by the electromagnetic simulation model and the actually measured iron loss value is within a preset range.

9. A computer-readable storage medium having a program stored thereon, which when executed by a processor implements the electromagnetic simulation model correction method according to any one of claims 1 to 7.

10. An electronic device comprising at least one processor, and at least one memory, bus coupled to the processor; the processor and the memory complete communication with each other through the bus; the processor is configured to invoke program instructions in the memory to perform the electromagnetic simulation model correction method of any of claims 1 to 7.