CN110147626A - The hot emulation mode of motor, device and electronic equipment - Google Patents
The hot emulation mode of motor, device and electronic equipment Download PDFInfo
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- CN110147626A CN110147626A CN201910438243.6A CN201910438243A CN110147626A CN 110147626 A CN110147626 A CN 110147626A CN 201910438243 A CN201910438243 A CN 201910438243A CN 110147626 A CN110147626 A CN 110147626A
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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Abstract
The application provides a kind of hot emulation mode of motor, device and electronic equipment, is related to technical field of motors.This method may include: the three-dimensional simulation model and parameter set corresponding with motor for obtaining motor；Grid dividing is carried out to three-dimensional simulation model by default finite element analysis model；Based on parameter set, finite element thermal analysis is carried out to the net region in three-dimensional simulation model by presetting finite element analysis model, obtains the simulation result of the Temperature Distribution including motor of default finite element analysis model output.In the present solution, helping to simplify modeling by default finite element analysis model to three-dimensional simulation model progress grid dividing, by helping to improve the computational efficiency of heat emulation to the net region progress finite element thermal analysis in three-dimensional simulation model.
Description
Technical field
The present invention relates to technical field of motors, set in particular to a kind of hot emulation mode of motor, device and electronics
It is standby.
Background technique
As industry and the development of information technology seem to the Protective strategy of motor and become more and more important in the industry.Traditional
Thermal protection for motors mode has: Equivalent heat path method, numerical solution etc..For Re Lufa, the calculating of thermal resistance is determined under normal conditions
The temperature rise of Re Lufa calculates, and this mode needs to establish thermal effect circuit and corresponding motor model, and establishes thermal effect electricity
The difficulty of road and corresponding motor model is big.For numerical solution, the pre-processing stage need to consume the plenty of time into
There is the modeling technical problem that difficulty is big, computational efficiency is low in row modeling and data prediction.
Summary of the invention
The application provides a kind of hot emulation mode of motor, device and electronic equipment, can improve that computation modeling difficulty is big, meter
The technical issues of calculating low efficiency.
To achieve the goals above, technical solution provided by the embodiment of the present application is as follows:
In a first aspect, the embodiment of the present application provides a kind of hot emulation mode of motor, which comprises obtain the three of motor
Tie up simulation model and parameter set corresponding with the motor；By default finite element analysis model to the three-dimensional simulation model into
Row grid dividing；Collect based on the parameter, by the default finite element analysis model to the net in the three-dimensional simulation model
Lattice region carries out finite element thermal analysis, obtains the Temperature Distribution including the motor of the default finite element analysis model output
Simulation result.
In the above-described embodiment, grid dividing is carried out to three-dimensional simulation model by default finite element analysis model, had
Help simplify modeling, by carrying out finite element thermal analysis to the net region in three-dimensional simulation model, helps to improve hot emulation
Computational efficiency.
With reference to first aspect, in some alternative embodiments, by default finite element analysis model to the three-dimensional
Simulation model carries out grid dividing, comprising: by the default finite element analysis model determine respectively with the three-dimensional artificial mould
Corresponding first mesh-density of rotor, stator, the second mesh-density in type；According to first mesh-density to the rotor
Grid dividing is carried out, and grid dividing is carried out to the stator according to second mesh-density.
In the above-described embodiment, preset finite element analysis model by component different in three-dimensional simulation model with phase
The mesh-density answered removes grid division, is conducive to the division of the components adaptive mesh such as rotor, stator.
With reference to first aspect, in some alternative embodiments, the method also includes: pass through the default finite element
Analysis model calculates the first error of the rate of heat flow of net region in the rotor, is greater than or equal to first in the first error
When preset threshold, determine that a mesh-density is greater than the net of first mesh-density by the default finite element analysis model
Lattice density is as the first new mesh-density corresponding with the rotor；Alternatively, passing through the default finite element analysis model meter
The second error for calculating the rate of heat flow of net region in the stator is greater than or equal to the second preset threshold in second error
When, determine that a mesh-density is greater than the mesh-density work of second mesh-density by the default finite element analysis model
For the second new mesh-density corresponding with the stator.
In the above-described embodiment, calculative grid has been refined to increase number of grid by increasing mesh-density
Region is conducive to improve computational accuracy, and helping to improve influences the skill of the hot simulation analysis of motor because grid dividing density is inadequate
Art problem.
With reference to first aspect, in some alternative embodiments, by the default finite element analysis model to described
Net region in three-dimensional simulation model carries out finite element thermal analysis, comprising: by the default finite element analysis model, utilizes
First formula calculates the rate of heat flow that the first radiation is conducted heat towards the second radiating surface in the three-dimensional simulation model, first radiation
Face, second radiating surface are any two net region in the three-dimensional simulation model；Pass through the default finite element fraction
Analysis model determines the temperature of the corresponding net region of second radiating surface based on the rate of heat flow；Obtaining each radiating surface institute
After the temperature of corresponding net region, obtained according to the temperature of net region corresponding to each radiating surface described three-dimensional imitative
The Temperature Distribution of each net region in true mode；
Wherein, first formula are as follows:
Q=ε σ A1F12(T1 4-T2 4)
In formula, q is rate of heat flow；
ε is radiance；
σ is Stefan-Boltzmann constant；
A1For the area of first radiating surface；
F12For the form factor of second radiating surface；
T1For the absolute temperature of first radiating surface；
T2For the absolute temperature of second radiating surface.
In the above-described embodiment, the rate of heat flow between each radiating surface can be calculated by the first formula, be then based on
The rate of heat flow determines the temperature of each net region, so that the Temperature Distribution of each net region in three-dimensional simulation model is obtained, it is real
The heat analysis of existing motor.
With reference to first aspect, in some alternative embodiments, obtain motor three-dimensional simulation model and with it is described
Before the corresponding parameter set of motor, the method also includes: the three-dimensional structure parameter based on the motor constructs the motor
The three-dimensional simulation model.
In the above-described embodiment, operator can neatly construct accordingly for the motor of different structure, size
The three-dimensional simulation model of motor carries out hot emulation convenient for motor of the operator to different structure, size.
With reference to first aspect, in some alternative embodiments, the parameter set includes: the specified function of the motor
The corresponding heat transfer coefficient of rate, operating voltage, revolving speed, torque, Poisson's ratio, rotor, stator, specific heat capacity.
In the above-described embodiment, the parameters such as the rated power based on motor, operating voltage, revolving speed preset finite element fraction
Finite element thermal analysis can be carried out to the net region in the three-dimensional simulation model by analysing model, to obtain simulation result.
Second aspect, the embodiment of the present application also provide a kind of hot simulator of motor, and described device includes: acquiring unit,
For obtaining the three-dimensional simulation model and parameter set corresponding with the motor of motor；Grid dividing unit, for by default
Finite element analysis model carries out grid dividing to the three-dimensional simulation model；Heat analysis unit leads to for collecting based on the parameter
It crosses the default finite element analysis model and finite element thermal analysis is carried out to the net region in the three-dimensional simulation model, obtain institute
State the simulation result of the Temperature Distribution including the motor of default finite element analysis model output.
In conjunction with second aspect, in some alternative embodiments, the grid dividing unit is also used to: by described pre-
If finite element analysis model determines the first mesh-density corresponding with rotor, stator in the three-dimensional simulation model respectively, the
Two mesh-densities；Grid dividing is carried out to the rotor according to first mesh-density, and close according to second grid
Degree carries out grid dividing to the stator.
In conjunction with second aspect, in some alternative embodiments, the heat analysis unit is also used to: by described default
Finite element analysis model calculates what the first radiation in the three-dimensional simulation model was conducted heat towards the second radiating surface using the first formula
Rate of heat flow, first radiating surface, second radiating surface are any two net region in the three-dimensional simulation model；It is logical
Cross the temperature that the default finite element analysis model determines the corresponding net region of second radiating surface based on the rate of heat flow；
After the temperature for obtaining net region corresponding to each radiating surface, according to net region corresponding to each radiating surface
Temperature obtains the Temperature Distribution of each net region in the three-dimensional simulation model；
Wherein, first formula are as follows:
Q=ε σ A1F12(T1 4-T2 4)
In formula, q is rate of heat flow；
ε is radiance；
σ is Stefan-Boltzmann constant；
A1For the area of first radiating surface；
F12For the form factor of second radiating surface；
T1For the absolute temperature of first radiating surface；
T2For the absolute temperature of second radiating surface.
The third aspect, the embodiment of the present application also provide a kind of electronic equipment, and the electronic equipment includes depositing of intercoupling
Module, processing module are stored up, computer program is stored in the memory module, when the computer program is held by the processing module
When row, so that the electronic equipment executes above-mentioned method.
Fourth aspect, the embodiment of the present application also provide a kind of computer readable storage medium, in the readable storage medium storing program for executing
It is stored with computer program, when the computer program is run on computers, so that the computer executes above-mentioned side
Method.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, the embodiment of the present application is cited below particularly, and match
Appended attached drawing is closed, is described in detail below.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described.It should be appreciated that the following drawings illustrates only some embodiments of the application, therefore it is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the functional block diagram of electronic equipment provided by the embodiments of the present application.
Fig. 2 is the structural schematic diagram of motor provided by the embodiments of the present application.
Fig. 3 is the flow diagram of the hot emulation mode of motor provided by the embodiments of the present application.
Fig. 4 is the structural schematic diagram of the motor after progress grid dividing provided by the embodiments of the present application.
Fig. 5 is the Temperature Distribution schematic diagram of the motor provided by the embodiments of the present application for emulating and obtaining.
Fig. 6 is the functional block diagram of the hot simulator of motor provided by the embodiments of the present application.
Icon: 10- electronic equipment；11- processing module；12- memory module；20- motor；21- rotor；22- stator；23-
Shell；The hot simulator of 100- motor；110- acquiring unit；120- grid dividing unit；130- heat analysis unit.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.It needs
It is noted that term " first ", " second " etc. are only used for distinguishing description, it is not understood to indicate or imply relatively important
Property.
With reference to the accompanying drawing, it elaborates to the embodiment of the present application.In the absence of conflict, following embodiments and
Feature in embodiment can be combined with each other.
Incorporated by reference to referring to Figures 1 and 2, electronic equipment 10 provided by the embodiments of the present application can be used for carrying out heat to motor 20
Emulation, can execute the hot emulation mode of motor as shown in Figure 3.
Wherein, electronic equipment 10 may be, but not limited to, PC (personal computer, PC), plate electricity
Brain, personal digital assistant (personal digital assistant, PDA), mobile internet surfing equipment (mobile Internet
Device, MID), server etc..Motor 20 can be motor, and motor includes but is not limited to synchronous motor, asynchronous electric
Machine etc. is here not especially limited the type of motor 20.
Referring to figure 3., the embodiment of the present application provides a kind of hot emulation mode of motor, and the hot emulation mode of the motor can be applied
In above-mentioned electronic equipment 10, each step of the hot emulation mode of motor can be executed or realized by electronic equipment 10.Wherein, electronics
Equipment 10 stores or is equipped with the default finite element analysis model for carrying out finite element thermal analysis, the default finite element analysis mould
Type can be that (ANSYS software is a kind of general finite element analysis software to ANSYS software, can be used for creating three-dimensional simulation model
And heat analysis is carried out to model).
Each step of the hot emulation mode of motor shown in Fig. 3 will be described in detail below:
Step S210 obtains the three-dimensional simulation model and parameter set corresponding with the motor 20 of motor 20.
In the present embodiment, the three-dimensional simulation model mode for obtaining motor 20 can be to pass through electronic equipment by operator
10 create the three-dimensional simulation model of a motor 20 from scratch, or by electronic equipment 10 from being previously stored with motor 20
The other equipment or computer readable storage medium (such as USB flash disk, hard disk etc.) of three-dimensional simulation model are got, electric to obtaining here
The mode of the three-dimensional simulation model of machine 20 is not especially limited.
Understandably, the three-dimensional simulation model of motor 20 can be created according to the actual situation for operator,
It can be the three-dimensional simulation model that other staff have been pre-created.For example, operator can lead on electronic equipment 10
Cross the three-dimensional simulation model that ANSYS software creates a motor 20 according to actual needs.Alternatively, operator (or other staff)
CAD (Computer Aided Design, CAD) graphics software creation one can be passed through in other equipment in advance
The three-dimensional simulation model of a motor 20, is then transmitted to electronic equipment 10 for three-dimensional simulation model created, so that electronics is set
Standby 10 get the three-dimensional simulation model of motor 20.
As an alternative embodiment, the three-dimensional simulation model of motor 20 can be using an entity motor as model
It is created, that is, the virtual architecture in the three-dimensional simulation model of motor 20 can be corresponding with the structure of the motor of entity.Example
Such as, may include in the three-dimensional simulation model of motor 20 21 model of rotor (or referred to as rotor 21), 22 model of stator (or referred to as
For stator 22).Optionally, which can also include 23 model of shell for covering rotor 21 and stator 22
(or referred to as shell 23).In addition, may include 21 iron core model of rotor, insertion setting in 21 model of rotor on iron core model
Permanent magnetism body Model, the coil windings model that is arranged on iron core model of winding.It may include 22 iron of stator in 22 model of stator
The coil windings etc. that core model, winding are arranged on 22 iron core model of stator.
In the present embodiment, the parameter set of motor 20 can be configured according to the actual situation.The parameter set may include
But it is not limited to rated power, operating voltage, operating current, revolving speed, torque, Poisson's ratio, 20 rotor 21 of motor, stator of motor 20
22 corresponding heat transfer coefficients, specific heat capacity.Wherein, 20 rotor 21 of motor, the corresponding heat transfer coefficient of stator 22 include each in rotor 21
The heat transfer coefficient of each component in the heat transfer coefficient and stator 22 of component, specific heat capacity include the specific heat capacity of each component and fixed in rotor 21
The specific heat capacity of each component in son 22.For example, heat transfer coefficient may include the heat transfer system of the heat transfer coefficient of coil windings, permanent magnet
The heat transfer coefficient of number, 21 iron core of rotor.Specific heat capacity may include the specific heat capacity of coil windings, the specific heat capacity of permanent magnet, rotor 21
The specific heat capacity etc. of iron core.Usually, the specific heat capacity for the component that same material is formed is identical, heat transfer coefficient is identical.
As an alternative embodiment, method can also include: based on the motor 20 before step S210
Three-dimensional structure parameter constructs the three-dimensional simulation model of the motor 20.
In the present embodiment, three-dimensional structure parameter can obtain for structural parameters of the operator based on entity motor 20
's.For example, three-dimensional structure parameter is the structural parameters of the entity motor 20 of equal proportion.The three-dimensional structure parameter includes but is not limited to
The number of turns, the size of permanent magnet (size may include the parameters such as the length, width and height of permanent magnet), 21 iron core of rotor of coil windings
Shape and size, the shape of 22 iron core of stator and size, the shape of shell 23 and size etc..Operator can be soft by charting
Part constructs three-dimensional simulation model corresponding with the motor 20 of entity based on three-dimensional structure parameter.
As an alternative embodiment, three-dimensional structure parameter can be configured according to the actual situation, may not need according to
Rely in the structural parameters of entity motor 20.That is, the three-dimensional structure parameter of motor 20 can be set according to demand by operator
It sets.Based on this, the three-dimensional that operator can neatly construct corresponding motor 20 for the motor 20 of different structure, size is imitative
True mode carries out hot emulation convenient for motor 20 of the operator to different structure, size.
Step S220 carries out grid dividing to the three-dimensional simulation model by default finite element analysis model.
Referring to figure 4., in the present embodiment, default finite element analysis model can be to each component in three-dimensional simulation model
Carry out grid dividing.That is, default finite element analysis model can be to rotor 21, stator 22, the shell 23 in three-dimensional simulation model
Equal components carry out grid dividing.The grid dividing is usually to carry out grid on the surface of the components such as rotor 21, stator 22, shell 23
It divides.
For example, the three-dimensional simulation model of motor 20 shown in Fig. 2 can be carried out grid dividing by default finite element analysis model,
The three-dimensional simulation model of motor 20 after obtaining grid dividing as shown in Figure 4.Divided each net region can be used as
One calculating heat transfer, the computing object of temperature change.Understandably, pass through the initial temperature of known each net region
Degree, transmitting heat, specific heat capacity etc., can calculating temperature of each net region under different moments, (temperature can be
The mean temperature of one net region), the temperature for being then based on each net region can determine the temperature of entire motor 20
Degree distribution.
Wherein, the density of the grid of division and the shape of grid can be configured according to the actual situation.For example, grid
Shape can be the shapes such as quadrangle, triangle.The shape of each grid in the same part can be identical, can be different.In addition,
The size of each grid can be identical, can not be identical, is not especially limited here.
As an alternative embodiment, step S220 may include: true by the default finite element analysis model
Fixed first mesh-density corresponding with rotor 21, stator 22 in the three-dimensional simulation model respectively, the second mesh-density；According to
First mesh-density carries out grid dividing to the rotor 21, and according to second mesh-density to the stator 22
Carry out grid dividing.
In the present embodiment, default finite element analysis model can be first to rotor 21, the stator 22 in three-dimensional simulation model
Equal components determine a corresponding mesh-density.For example, default finite element analysis model can size based on rotor 21, surface
The parameters such as product determine first mesh-density corresponding with rotor 21；Default finite element analysis model can be based on stator 22
The parameters such as size, surface area determine second mesh-density corresponding with stator 22；Default finite element analysis model can be with base
Second mesh-density corresponding with shell 23 is determined in parameters such as size, the surface areas of shell 23.
Alternatively, the first mesh-density is a first specific trellis density corresponding with rotor 21, the second mesh-density is
Second specific trellis density corresponding with stator 22.First specific trellis density and the second specific trellis density can be according to reality
Situation is configured.First specific trellis density corresponding with rotor 21 can be determined as rotor by default finite element analysis model
21 the first mesh-density, the second grid that second specific trellis density corresponding with stator 22 can be determined as stator 22 are close
Degree.
Wherein, mesh-density can be regarded as the number of the grid in unit area.Wherein, each grid in unit area
Between area difference percentage usually within a preset range, the area to avoid a part of grid is excessive, a part of grid
Area it is too small.Difference percentage can be calculated by formula, which can be with are as follows: and difference percentage=| the face of grid A
The area of product-grid B | area × 100% of ÷ grid A.Wherein, unit area can be configured according to the actual situation, be led to
It may include multiple grids in unit area for often.The preset range of difference percentage can also carry out according to the actual situation
Setting for example, preset range can be an interval range less than 500%, for example is 0-400%, here to preset range
Specific size be not construed as limiting.
Based on this, default finite element analysis model passes through close with corresponding grid to component different in three-dimensional simulation model
Degree removes grid division, to achieve the purpose that free mesh, convenient for carrying out adaptive mesh to components such as rotor 21, stators 22
It divides.
As an optional implementation manner, method can also include: to be calculated by the default finite element analysis model
The first error of the rate of heat flow of net region in the rotor 21 is greater than or equal to the first preset threshold in the first error
When, determine that a mesh-density is greater than the mesh-density work of first mesh-density by the default finite element analysis model
For the first new mesh-density corresponding with the rotor 21.Wherein, the first preset threshold can be set according to the actual situation
It sets.
In the present embodiment, default finite element analysis model calculates the meter of the error of the rate of heat flow of net region in each component
Calculation mode can be with are as follows: for example, default finite element analysis model can calculate each node and put down in all directions for rotor 21
Maximum error amount between equal hot-fluid and non-mean heat flux.Node can be regarded as a net region.
For example, error calculation can be used for the steady-state analysis of linear and nonlinear, in general preprocessor POST1 into
Row.For example, the mode of the grid dividing error metrics in ANSYS software can when default finite element analysis model is ANSYS software
With are as follows:
Estimate the heat dissipation (can be indicated with TERR) in selected unit；Unit can be Btu or J.In POST1 processor
ETABLE order storage, sequence and list can be used.Main Menu > General can be used in the cloud atlas of TERR
Postproc > Contour Plot > Element Solution is completed.
Maximum hot-fluid deviation (can be indicated with TDSG) in determination unit；Each node is in all directions in computing unit
Maximum error amount between mean heat flux and non-mean heat flux.Unit is Btu/ (in2·h).The storage of TDSG, sequence, list
It is similar with drawing practice with TERR.
Step-up error restraining error limit, including (available " SMNB " indicates upper and lower bound (under available " SMXB " expression to the upper limit
Limit): when with cloud atlas draw discrete value (temperature gradient and hot-fluid) when (estimation error function is in the open state), SMNB and
SMXB will appear in legend area, there is shown the discontinuous range of the numerical value.Its calculation method is as follows:
Optionally, method can also include: to calculate grid in the stator 22 by the default finite element analysis model
Second error of the rate of heat flow in region is preset with when second error is greater than or equal to the second preset threshold by described
Finite element analysis model determines that a mesh-density is greater than the mesh-density of second mesh-density as right with the stator 22
The the second new mesh-density answered.Wherein, the second preset threshold can be configured according to the actual situation.
Alternatively, method can also include: to calculate net region in shell 23 by the default finite element analysis model
The third error of rate of heat flow passes through the default finite element fraction when the third error is greater than or equal to third predetermined threshold value
Analysis model determines that a mesh-density is greater than the mesh-density of the third mesh-density as corresponding with the shell 23 new
Third mesh-density.Wherein, third predetermined threshold value can be configured according to the actual situation.
When error is larger (for example first error is greater than or equal to the first preset threshold), by increasing mesh-density, with
Increase number of grid, refined calculative net region, is conducive to improve computational accuracy.Understandably, in computational accuracy
When needing of engineering is unsatisfactory for (for example, if computational accuracy error is more than ± 2%, it is believed that computational accuracy, which is unsatisfactory for engineering, to be needed
Want), it can be by increasing mesh-density, automatic tessellated mesh, to reduce because of grid dividing bring error, to improve calculating
Precision, can improve because grid dividing density not enough due to influence 20 hot simulation analysis of motor the technical issues of.
Step S230, collects based on the parameter, by the default finite element analysis model to the three-dimensional simulation model
In net region carry out finite element thermal analysis, obtain the default finite element analysis model output includes the motor 20
The simulation result of Temperature Distribution.
In the present embodiment, after parameter set input is preset in finite element analysis model, finite element analysis is preset
Model can rated power based on motor 20, operating voltage, operating current, revolving speed, torque, Poisson's ratio, 20 rotor 21 of motor,
The parameters such as the corresponding heat transfer coefficient of stator 22, specific heat capacity carry out finite element thermal analysis to the net region in three-dimensional simulation model,
And obtain include the Temperature Distribution of motor 20 simulation result.Based on this, by the net region in three-dimensional simulation model into
Row finite element thermal analysis advantageously reduces data processing amount, promotes the efficiency that heat emulation data calculate.
Understandably, electronic equipment 10 can be based on the temperature corresponding with each grid being calculated, to three-dimensional artificial
Model carries out color rendering.For example, can be by the gray scale of different color or different gloomy degree come to three-dimensional simulation model
It is rendered, allows operator to pass through the color or gloomy degree of the three-dimensional simulation model after viewing rendering to grasp electricity
The Temperature Distribution of machine 20.For example, simulation result may include 20 thermo parameters method cloud atlas of motor as shown in Figure 5.
The mode of heat transmitting generally includes these three modes of heat transfer, thermal convection and heat radiation.For the heat of motor 20
For transfer mode, since motor 20 includes stator 22, rotor 21, it is possible to which the thermaltransmission mode of motor 20 is attributed to heat
Radiate thermaltransmission mode.
20 winding of motor is passed through voltage, flows through electric current, will emit electromagnetic energy, and can be absorbed by objects such as iron cores, from
And it is changed into the heat of heat.Usually this by an object emission electromagnetic energy, and is absorbed by other objects and be then changed into
The exchange process of the heat of heat is interpreted as the heat radiation of object.It is directly proportional between the temperature of object and the heat that the unit time radiates
Relationship.Heat transfer medium is required for heat transfer and thermal convection both modes, and heat radiation does not need heat transfer medium.?
The radiation between multiple objects is usually considered in engineering, follows heat radiation principle, radiation energy in 20 model coil winding of motor
Also heat can be absorbed while amount.Applicants have found that can be by calculating each net region in three-dimensional simulation model
Heat transmitting relevant parameter, just can obtain just can be anti-based on the temperature of each net region with the net region corresponding temperature
Mirror the Temperature Distribution of 20 three-dimensional simulation model of motor.
As an alternative embodiment, step S230 may include: by the default finite element analysis model, benefit
The rate of heat flow that the first radiation is conducted heat towards the second radiating surface in the three-dimensional simulation model, first spoke are calculated with the first formula
Penetrate face, second radiating surface is any two net region in the three-dimensional simulation model；Pass through the default finite element
Analysis model determines the temperature of the corresponding net region of second radiating surface based on the rate of heat flow；Obtaining each radiating surface
After the temperature of corresponding net region, the three-dimensional is obtained according to the temperature of net region corresponding to each radiating surface
The Temperature Distribution of each net region in simulation model；
Wherein, first formula are as follows:
Q=ε σ A1F12(T1 4-T2 4) (1)
In formula, q is rate of heat flow；
ε is radiance；
σ is Stefan-Boltzmann constant；
A1For the area of first radiating surface；
F12For the form factor of second radiating surface；
T1For the absolute temperature of first radiating surface；
T2For the absolute temperature of second radiating surface.
When carrying out finite element thermal analysis, default finite element analysis model can use Transient Thermal Analysis mode.In transient state
In heat analysis, heat analysis can be carried out by the initial time step-length of calculating.Initial time step-length can (can by finishing wet number
Indicated with " Biot ") and Fourier number (available " Fourier " expression) determine.
Biot number is that can use in the thermal resistance convection current and the conduction ratio factor for not considering each part dimension in three-dimensional simulation model
Bi is indicated:
In formula (2), Δ x is that (nominal cell width can be regarded as the width of above-mentioned grid cell to nominal cell width
Degree)；α is average surface (average surface can be regarded as: area is the grid of the average area of all grids divided) heat transfer system
Number, λ is average thermal conductivity.
Fourier number is the time (Δ t/t) for not considering size, can be indicated with Fo:
In formula (3), ρ and c are rotor 21 in three-dimensional simulation model, the average density of 22 material of stator and ratio respectively
Thermal capacitance.
If Bi < 1: Fourier number can be set as to constant and solve Δ t carry out predicted time step-length:
In formula (4), Δ t indicates time step, and α indicates heat dissipation, and β indicates scale factor.Understandably, biggish α
Numerical value indicates that material is easy thermally conductive and is not easy to store thermal energy.The value range of β can be with are as follows: 0.1≤β≤0.5.
If Bi > 1, time step can be predicted with the product of Fourier and Biot number, as follows:
In formula (6), the value range of β can be with are as follows: 0.1≤β≤0.5.The precision of prediction of time step is wide with unit
The value of degree, average method and scale factor β and change.
In addition, net heat transmitting analysis belongs to nonlinearity inside motor model it can be seen from formula (1).?
Radiation can be handled by plane phenomenon in default finite element analysis model (such as ANSYS software).I.e., it is possible to by motor 20
Three-dimensional simulation model regards a micro unit as, according to the available heat transfer control differential equation of the first law of thermodynamics.Heat point
The control differential equation of heat transfer can be in analysis are as follows:
In formula (8):
Equivalent integrated form is converted by heat transfer control differential equation in heat analysis:
In formula (10):
In formula (8)-(11), KxxFor the second derivative to solid axes x；
KyyFor the second derivative to solid axes y；
KzzFor the second derivative to solid axes z；
X, y, z is respectively x-axis in space coordinates, y-axis, the parameter in z-axis direction；
T is the time；
T is the temperature of 20 local environment of motor；
Vol is unit volume, is the corresponding volume in net region；
The heat generated for unit volume；
TBFor the temperature of fluid；
hfFor surface coefficient of heat transfer；
For the dummy variables of temperature；
S2For the application area of heat flux；
S3For the application area of convection current；
[D] is the heat conductivity properties of 20 material of motor.
Understandably, in formula (10), the reduction that integral weak form requires the continuity of a function is to improve power letter
(weight function can be regarded as number: when calculating the indexs such as average in statistics, have work of weighing the relative importance to variate-values such as motor temperatures
Numerical value or function) continuity require to be cost, due to having no continuity requirement to weight function originally, but suitably mention
Height is not difficult to the requirement of its continuity, because they are the known functions that can choose.It is worth noting that formally seeing
Weak form requires to reduce to the continuity of a function, but usually the more original differential equation more approaches to actual physical problem
True solution, because the original differential equation often proposes excessively smooth requirement to solution.
Through heat analysis equation it is known that during heat analysis, material property related with temperature, surface heat transfer system
The vector and use radiating element (radiating element can be understood as a grid) of several, hot-fluid or hot-fluid assume load
Vector coupling all includes non-linear.
Referring once again to Fig. 1, in the present embodiment, electronic equipment 10 can be used for executing or realizing that above-mentioned motor heat is imitative
True method.The electronic equipment 10 may include processing module 11, memory module 12 and the hot simulator 100 of motor, the place
It is directly or indirectly electrically connected between reason module 11, memory module 12 and each element of the hot simulator 100 of motor, with reality
The transmission or interaction of existing data.For example, these elements can be realized between each other by one or more communication bus or signal wire
It is electrically connected.
The processing module 11 can be a kind of IC chip, the processing capacity with signal.Above-mentioned processing module
11 can be general processor.For example, the processor can be central processing unit (Central Processing Unit,
CPU), graphics processor (Graphics Processing Unit, GPU), network processing unit (Network Processor,
NP) etc.；Can also be digital signal processor (DSP), specific integrated circuit (ASIC), field programmable gate array (FPGA) or
Person other programmable logic device, discrete gate or transistor logic, discrete hardware components.It may be implemented or execute sheet
Apply for disclosed each method, step and the logic diagram in embodiment.
The memory module 12 may be, but not limited to, random access memory, and read-only memory may be programmed read-only deposit
Reservoir, Erasable Programmable Read Only Memory EPROM, electrically erasable programmable read-only memory etc..In the present embodiment, the storage
Module 12 can be used for storing the three-dimensional simulation model of motor 20, default finite element analysis model etc..Certainly, the memory module
12 can be also used for storage program, and the processing module 11 executes the program after receiving and executing instruction.
The hot simulator 100 of motor includes that at least one can be stored in the form of software or firmware (firmware)
In the memory module 12 or the software function that is solidificated in 10 operating system of electronic equipment (operating system, OS)
It can module.The processing module 11 is for executing the executable module stored in the memory module 12, such as the emulation of motor heat
Software function module included by device 100 and computer program etc..
It is understood that structure shown in FIG. 1 is only a kind of structural schematic diagram of electronic equipment 10, the electronic equipment
10 can also include than more components shown in Fig. 1.Each component shown in Fig. 1 can be real using hardware, software, or its combination
It is existing.
Fig. 6 is please referred to, the embodiment of the present application also provides a kind of hot simulator 100 of motor, can be used for executing or realizing
Each step of the hot emulation mode of motor.The hot simulator 100 of the motor may include: acquiring unit 110, grid dividing unit
120 and heat analysis unit 130.
Acquiring unit 110, for obtaining the three-dimensional simulation model and parameter set corresponding with the motor 20 of motor 20.It can
Understand ground, acquiring unit 110 can be used for executing step S210 as shown in Figure 3, and the operation content specifically executed can refer to pair
The detailed description of step S210, which is not described herein again.
Grid dividing unit 120, for carrying out grid to the three-dimensional simulation model by default finite element analysis model
It divides.Understandably, grid dividing unit 120 can be used for executing step S220 as shown in Figure 3, in the operation specifically executed
Hold the detailed description that can refer to step S220, which is not described herein again.
Heat analysis unit 130, for collecting based on the parameter, by the default finite element analysis model to the three-dimensional
Net region in simulation model carries out finite element thermal analysis, and obtain the default finite element analysis model output includes described
The simulation result of the Temperature Distribution of motor 20.Understandably, heat analysis unit 130 can be used for executing step as shown in Figure 3
S230, the operation content specifically executed can refer to the detailed description to step S230, and which is not described herein again.
Optionally, the hot simulator 100 of motor can also include model construction unit.Motor is obtained in acquiring unit 110
Before 20 three-dimensional simulation model and parameter set corresponding with the motor 20, model construction unit is used to be based on the motor 20
Three-dimensional structure parameter, construct the three-dimensional simulation model of the motor 20.
Optionally, the grid dividing unit 120 is also used to: by the default finite element analysis model determine respectively with
Rotor 21, corresponding first mesh-density of stator 22, the second mesh-density in the three-dimensional simulation model；According to described first
Mesh-density carries out grid dividing to the rotor 21, and carries out grid to the stator 22 according to second mesh-density
It divides.
Optionally, the hot simulator 100 of motor can also include that mesh-density adjusts unit.Mesh-density adjusts unit and uses
In the first error for calculating the rate of heat flow of net region in the rotor 21 by the default finite element analysis model, described
When first error is greater than or equal to the first preset threshold, determine that a mesh-density is big by the default finite element analysis model
In first mesh-density mesh-density as the first new mesh-density corresponding with the rotor 21.
It is used to calculate net in the stator 22 by the default finite element analysis model alternatively, mesh-density adjusts unit
Second error of the rate of heat flow in lattice region, when second error is greater than or equal to the second preset threshold, by described default
Finite element analysis model determine a mesh-density be greater than second mesh-density mesh-density as with the stator 22
Corresponding the second new mesh-density.
Optionally, the heat analysis unit 130 is also used to: by the default finite element analysis model, utilizing the first public affairs
Formula calculates the rate of heat flow that the first radiation is conducted heat towards the second radiating surface in the three-dimensional simulation model, first radiating surface, institute
Stating the second radiating surface is any two net region in the three-dimensional simulation model；Pass through the default finite element analysis model
The temperature of the corresponding net region of second radiating surface is determined based on the rate of heat flow；It is obtaining corresponding to each radiating surface
After the temperature of net region, the three-dimensional simulation model is obtained according to the temperature of net region corresponding to each radiating surface
In each net region Temperature Distribution.
Wherein, first formula are as follows:
Q=ε σ A1F12(T1 4-T2 4) (12)
In formula (12), q is rate of heat flow；
ε is radiance；
σ is Stefan-Boltzmann constant；
A1For the area of first radiating surface；
F12For the form factor of second radiating surface；
T1For the absolute temperature of first radiating surface；
T2For the absolute temperature of second radiating surface.
It should be noted that it is apparent to those skilled in the art that, for convenience and simplicity of description, on
The specific work process of the hot simulator 100 of electronic equipment 10, motor of description is stated, it can be with reference to each step in preceding method
Corresponding process no longer excessively repeats herein.
The embodiment of the present application also provides a kind of computer readable storage medium.Computer journey is stored in readable storage medium storing program for executing
Sequence, when computer program is run on computers, so that computer is executed such as above-mentioned motor heat emulation as described in the examples
Method.
Through the above description of the embodiments, those skilled in the art can be understood that the application can lead to
Hardware realization is crossed, the mode of necessary general hardware platform can also be added to realize by software, based on this understanding, this Shen
Technical solution please can be embodied in the form of software products, which can store in a non-volatile memories
In medium (can be CD-ROM, USB flash disk, mobile hard disk etc.), including some instructions are used so that a computer equipment (can be
Personal computer, server or network equipment etc.) execute method described in each implement scene of the application.
In conclusion the application provides a kind of hot emulation mode of motor, device and electronic equipment.This method may include:
Obtain the three-dimensional simulation model and parameter set corresponding with motor of motor；By default finite element analysis model to three-dimensional artificial mould
Type carries out grid dividing；Based on parameter set, by default finite element analysis model to the net region in three-dimensional simulation model into
Row finite element thermal analysis obtains the simulation result of the Temperature Distribution including motor of default finite element analysis model output.At this
In scheme, grid dividing is carried out to three-dimensional simulation model by default finite element analysis model, helps to simplify modeling, by right
Net region in three-dimensional simulation model carries out finite element thermal analysis, helps to improve the computational efficiency of heat emulation.
In embodiment provided herein, it should be understood that disclosed devices, systems, and methods can also lead to
Other modes are crossed to realize.Devices, systems, and methods embodiment described above is only schematical, for example, in attached drawing
Flow chart and block diagram show that the system of multiple embodiments according to the application, the possibility of method and computer program product are real
Existing architecture, function and operation.In this regard, each box in flowchart or block diagram can represent module, a journey
A part of sequence section or code, a part of the module, section or code include one or more for realizing defined
The executable instruction of logic function.It should also be noted that in some implementations as replacement, function marked in the box
It can also occur in a different order than that indicated in the drawings.For example, two continuous boxes can actually be substantially in parallel
It executes, they can also be executed in the opposite order sometimes, and this depends on the function involved.It is also noted that block diagram and/
Or the combination of each box in flow chart and the box in block diagram and or flow chart, can with execute as defined in function or
The dedicated hardware based system of movement is realized, or can be realized using a combination of dedicated hardware and computer instructions.
In addition, each functional module in each embodiment of the application can integrate one independent part of formation together, it can also be with
It is modules individualism, an independent part can also be integrated to form with two or more modules.
It can replace, can be realized wholly or partly by software, hardware, firmware or any combination thereof.When
When using software realization, can entirely or partly it realize in the form of a computer program product.The computer program product
Including one or more computer instructions.It is all or part of when loading on computers and executing the computer program instructions
Ground is generated according to process or function described in the embodiment of the present application.The computer can be general purpose computer, special purpose computer,
Computer network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or
Person is transmitted from a computer readable storage medium to another computer readable storage medium, for example, the computer instruction
Wired (such as coaxial cable, optical fiber, digital subscriber can be passed through from a web-site, computer, server or data center
Line (DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, server or data
It is transmitted at center.The computer readable storage medium can be any usable medium that computer can access and either wrap
The data storage devices such as server, the data center integrated containing one or more usable mediums.The usable medium can be magnetic
Property medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk
Solid State Disk (SSD)) etc..
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of hot emulation mode of motor, which is characterized in that the described method includes:
Obtain the three-dimensional simulation model and parameter set corresponding with the motor of motor；
Grid dividing is carried out to the three-dimensional simulation model by default finite element analysis model；
Collect based on the parameter, by the default finite element analysis model to the net region in the three-dimensional simulation model into
Row finite element thermal analysis obtains the emulation knot of the Temperature Distribution including the motor of the default finite element analysis model output
Fruit.
2. the method according to claim 1, wherein by default finite element analysis model to the three-dimensional artificial
Model carries out grid dividing, comprising:
Respectively corresponding with rotor, the stator in the three-dimensional simulation model the is determined by the default finite element analysis model
One mesh-density, the second mesh-density；
Grid dividing is carried out to the rotor according to first mesh-density, and according to second mesh-density to described
Stator carries out grid dividing.
3. according to the method described in claim 2, it is characterized in that, the method also includes:
The first error that the rate of heat flow of net region in the rotor is calculated by the default finite element analysis model, described
When first error is greater than or equal to the first preset threshold, determine that a mesh-density is big by the default finite element analysis model
In first mesh-density mesh-density as the first new mesh-density corresponding with the rotor；
Alternatively, the second error of the rate of heat flow of net region in the stator is calculated by the default finite element analysis model,
When second error is greater than or equal to the second preset threshold, a grid is determined by the default finite element analysis model
Density is greater than the mesh-density of second mesh-density as the second new mesh-density corresponding with the stator.
4. the method according to claim 1, wherein by the default finite element analysis model to the three-dimensional
Net region in simulation model carries out finite element thermal analysis, comprising:
By the default finite element analysis model, using the first formula calculate in the three-dimensional simulation model the first radiation towards
The rate of heat flow of second radiating surface heat transfer, first radiating surface, second radiating surface are appointing in the three-dimensional simulation model
It anticipates two net regions；
The corresponding net region of second radiating surface is determined based on the rate of heat flow by the default finite element analysis model
Temperature；
After the temperature for obtaining net region corresponding to each radiating surface, according to grid regions corresponding to each radiating surface
The temperature in domain obtains the Temperature Distribution of each net region in the three-dimensional simulation model；
Wherein, first formula are as follows:
In formula, q is rate of heat flow；
ε is radiance；
σ is Stefan-Boltzmann constant；
A1For the area of first radiating surface；
F12For the form factor of second radiating surface；
T1For the absolute temperature of first radiating surface；
T2For the absolute temperature of second radiating surface.
5. method described in any one of -4 according to claim 1, which is characterized in that in the three-dimensional simulation model for obtaining motor
And before parameter set corresponding with the motor, the method also includes:
Three-dimensional structure parameter based on the motor constructs the three-dimensional simulation model of the motor.
6. method described in any one of -4 according to claim 1, which is characterized in that the parameter set includes:
The corresponding heat transfer coefficient of rated power, operating voltage, revolving speed, torque, Poisson's ratio, rotor, stator of the motor,
Specific heat capacity.
7. a kind of hot simulator of motor, which is characterized in that described device includes:
Acquiring unit, for obtaining the three-dimensional simulation model and parameter set corresponding with the motor of motor；
Grid dividing unit, for carrying out grid dividing to the three-dimensional simulation model by default finite element analysis model；
Heat analysis unit, for collecting based on the parameter, by the default finite element analysis model to the three-dimensional artificial mould
Net region in type carries out finite element thermal analysis, and obtain the default finite element analysis model output includes the motor
The simulation result of Temperature Distribution.
8. device according to claim 7, which is characterized in that the grid dividing unit is also used to:
Respectively corresponding with rotor, the stator in the three-dimensional simulation model the is determined by the default finite element analysis model
One mesh-density, the second mesh-density；
Grid dividing is carried out to the rotor according to first mesh-density, and according to second mesh-density to described
Stator carries out grid dividing.
9. device according to claim 7, which is characterized in that the heat analysis unit is also used to:
By the default finite element analysis model, using the first formula calculate in the three-dimensional simulation model the first radiation towards
The rate of heat flow of second radiating surface heat transfer, first radiating surface, second radiating surface are appointing in the three-dimensional simulation model
It anticipates two net regions；
The corresponding net region of second radiating surface is determined based on the rate of heat flow by the default finite element analysis model
Temperature；
After the temperature for obtaining net region corresponding to each radiating surface, according to grid regions corresponding to each radiating surface
The temperature in domain obtains the Temperature Distribution of each net region in the three-dimensional simulation model；
Wherein, first formula are as follows:
In formula, q is rate of heat flow；
ε is radiance；
σ is Stefan-Boltzmann constant；
A1For the area of first radiating surface；
F12For the form factor of second radiating surface；
T1For the absolute temperature of first radiating surface；
T2For the absolute temperature of second radiating surface.
10. a kind of electronic equipment, which is characterized in that the electronic equipment includes the memory module to intercouple, processing module, institute
It states and stores computer program in memory module, when the computer program is executed by the processing module, so that the electronics
Equipment executes the method as described in any one of claim 1-6.
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| CN115062439A (en) * | 2022-07-27 | 2022-09-16 | 浙江吉利控股集团有限公司 | Simplified model construction method, device, equipment and readable storage medium |
| CN116502340B (en) * | 2023-06-25 | 2023-11-21 | 江铃汽车股份有限公司 | Thermal boundary data processing method, system, computer and readable storage medium |
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