CN105184020B - Sensing heating emulation mode - Google Patents
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- CN105184020B CN105184020B CN201510675426.1A CN201510675426A CN105184020B CN 105184020 B CN105184020 B CN 105184020B CN 201510675426 A CN201510675426 A CN 201510675426A CN 105184020 B CN105184020 B CN 105184020B
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Abstract
The present invention provides a kind of sensing heating emulation mode, according to the shape of steel part to be heated, the finite element model of electromagnetic induction heating is established using finite element analysis software, it solves to realize the simulation to steel part sensing heating process, obtain analog result, under conditions of analog result meets workpiece heat demand, the equivalent inductance and equivalent resistance of induction coil-steel part system are solved, and determines impedance and the compensating electric capacity of induction heating power according to the equivalent inductance of solution and equivalent resistance.By carrying out analogue simulation to sensing heating process, theoretical direction is provided to the configuration of induction heating power, to reduce design error, saves design cost.
Description
Technical field
The present invention relates to sensing heating fields, more particularly, to a kind of sensing heating emulation mode.
Background technology
In induction heating technique, in the case where the diameter of workpiece, the speed of service and heating temperature etc. determine, according to number
Value analysis as a result, and combine the factors such as characteristic of power supply, you can determine used heated current frequency, heater wire when heating
The technological parameters such as the length of circle.In addition, the structural parameters such as the number of turns of heating coil, internal diameter, copper pipe gap determine heater wire
The electric parameter of circle-steel part system：Quality factor, inductance value, equivalent resistance.These electric parameters are induction heating power electricity
Design of gas system and matched important foundation cause the load impedance of induction heating power if electrical system matching is unreasonable
It is higher or relatively low, on the one hand it can cause induction heating power that rated output power is not achieved, it cannot having induction heating power
Power transmission is imitated to heating coil, increases the reactive loss during circuit transmission, reduces the electrical efficiency of induction heating power；
On the other hand keep induction heating power operating status unreasonable, cause the power device service life of induction heating power low, therefore
Barrier rate is high, can not run steadily in the long term.
And in the design of existing induction heating power, traditional equivalent circuit mould based on transformer theory is continued to use always
Type and empirical equation can only estimate roughly macroscopical electric parameter such as power, impedance and power factor, and calculating error is larger,
It generally requires to work by a large amount of test adjustment, the structural parameters and electric parameter of coil could be finally determined, to expend
A large amount of man power and material, and cause the design cycle of induction heating power long, efficiency is low.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is to propose a kind of sensing heating emulation mode.
Sensing heating emulation mode according to the ... of the embodiment of the present invention, including：
Step 1：Finite element electromagnetic induction heating process simulation model is established using finite element software, is included the following steps：
Step 1.1：The a quarter of modulus type is modeled, and the model includes by steel part, induction coil and air group
At system, the steel part is inserted into the induction coil；
Step 1.2：It creates or is read in from other modeling softwares several using the front processor of the finite element software itself
What model；
Step 1.3：In electromagnetic field analysis part, far-field region edge magnetic potential is set as zero, the steel part center applies
Magnetic line of force parallel boundary condition, it is zero that corresponding magnetic potential, which is arranged, on the plane of symmetry, and excitation ource electric current is applied to the induction coil
On section, using the excitation condition as magnetic field；
Step 1.4：Define the resistivity and relative permeability of the steel part in 20 DEG C of -1000 DEG C of temperature ranges, the sense
Answer the resistivity and relative permeability of coil, the relative permeability of air；
Step 1.5：In temperature field analysis part, the induction coil and air element are both configured to dummy cell, only counted
The thermal field in the steel part region is calculated, the air initial temperature around the steel part is set as constant；The steel contacted with air
Part surface only calculates the radiant heat exchange carried out with air-grid node；
Step 1.6：The thermal coefficient of the steel part, specific heat capacity, density in 20 DEG C of -1000 DEG C of temperature ranges are defined, it is described
Heat emissivity coefficient, the Boltzmann's constant of steel piece surface；
Step 1.7：Divide the grid of the steel part；
Step 1.8：The coupling between electromagnetism-heat is carried out using sequential coupling method to calculate, first according to the temperature of primary condition
Field is spent, determines the physical parameter of material, solves electromagnetic problems, thus obtained electromagnetic field output is thermally generated rate, as
Thermal field emulates the input of required heat source, then carries out Temperature calculating, while according to the thermo parameters method of the steel part at this time,
It corrects the physical parameter of the steel part material, then solves electromagnetic field, so recycle, the heating time until reaching setting,
Step 2:Electromagnetic induction heating process simulation emulates, including：
Step 2.1：Keep output frequency, output current and the output voltage of induction heating power constant, simulation obtains institute
State the Temperature Distribution after steel part heating；
Step 2.2：Judge whether meet the needs of heating process based on the Temperature Distribution,
Step 3:To the impedance solution procedure analog simulation of the system, including：
Step 3.1：Using the finite element analysis software, a quarter of the model is taken to be modeled；
Step 3.2：It creates or is read in from other modeling softwares several using the front processor of the finite element software itself
What model；
Step 3.3：In electromagnetic field analysis part, far-field region edge magnetic potential is set as zero, the steel part center applies
Magnetic line of force parallel boundary condition, it is zero that corresponding magnetic potential, which is arranged, on the plane of symmetry, and excitation ource electric current is applied to the induction coil
On section, using the excitation condition as magnetic field；
Step 3.4：Define the resistivity and relative permeability of the steel part in 20 DEG C of -1000 DEG C of temperature ranges, the sense
Answer the resistivity and relative permeability of coil, the relative permeability of air；
Step 3.5：It is calculated using the method for magnetic field analysis, simulation obtains the equivalent inductance and equivalent resistance of the system；
Step 3.6：The resistance of the induction heating power is determined according to the equivalent inductance and equivalent resistance of the system
Anti- and compensating electric capacity.
Sensing heating emulation mode according to the ... of the embodiment of the present invention, according to the shape of steel part to be heated, using finite element fraction
Analysis software establishes the finite element model of electromagnetic induction heating, solves to realize the simulation to steel part sensing heating process, obtains mould
It is quasi- as a result, under conditions of analog result meets workpiece heat demand, solve induction coil-steel part system equivalent inductance and
Equivalent resistance, and determine according to the equivalent inductance of solution and equivalent resistance impedance and the compensating electric capacity of induction heating power.The party
Case has the following advantages：
(1) by carrying out analogue simulation to sensing heating process, the configuration of induction heating power is carried based on analog result
Design cost is saved, while shortening the design cycle of induction heating power to reduce design error for theoretical direction, improved
Design efficiency；
(2) design parameter that can optimize induction coil at any time by analogue simulation, makes its efficiency optimization；
(3) by improving the efficiency of induction heating power, utilization rate of electrical is directly improved, to reach the mesh of energy-saving and emission-reduction
's.
In some embodiments, in step 1.7, the density of the grid is successively decreased from the surface of the steel part to center.
In some embodiments, in step 2.2, if it is determined that meeting the needs of heating process, then step 3 is carried out；Such as
Fruit judges the demand for being unsatisfactory for heating process, then after correcting the model, carries out step 1 again.
In some embodiments, in step 1.4, define 20 DEG C of -600 DEG C of temperature ranges in the steel part resistivity and
Relative permeability, the resistivity and relative permeability of the induction coil, the relative permeability of air；In step 1.6, definition
The thermal coefficient of the steel part, specific heat capacity, density in 20 DEG C of -600 DEG C of temperature ranges, the heat emissivity coefficient of the steel piece surface,
Boltzmann's constant；And in step 3.4, the resistivity and relative magnetic permeability of the steel part in 20 DEG C of -600 DEG C of temperature ranges are defined
Rate, the resistivity and relative permeability of the induction coil, the relative permeability of air.
In some embodiments, the shape of the induction coil is determined according to the shape of the steel part.
In some embodiments, the shape of the induction coil includes：Circle spiral shape, ellipse spiral shape, square spiral shape,
Rectangular coil shape.
Description of the drawings
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein：
Fig. 1 is sensing heating emulation mode flow chart according to the ... of the embodiment of the present invention.
Fig. 2 is that the sensing heating model according to the ... of the embodiment of the present invention based on circle spiral shape induction coil-rod iron system shows
It is intended to.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Fig. 1 is the sensing heating emulation mode flow chart according to the embodiment of the present invention.As shown in Figure 1, according to steel to be heated
The shape of part establishes the finite element model of electromagnetic induction heating using finite element analysis software, solves and is incuded to steel part with realizing
The simulation of heating process obtains analog result, under conditions of analog result meets workpiece heat demand, solves induction coil-
The equivalent inductance and equivalent resistance of steel part system, and induction heating power is determined according to the equivalent inductance and equivalent resistance of solution
Impedance and compensating electric capacity.
To more fully understand technical solution provided by the invention, below to justify the sense that spiral shape induction coil and rod iron are constituted
For answering heating system, the sensing heating emulation mode is specifically described.It is noted that following embodiment is only used for describing this hair
It is bright, it is not used in limitation of the present invention.Those skilled in the art can use emulation mode provided by the invention, any to being based on
The induction heating system of model carries out analog simulation.
Fig. 2 show the sensing heating mould according to the ... of the embodiment of the present invention based on circle spiral shape induction coil-rod iron system
Type schematic diagram.As shown in Fig. 2, the model includes the system being made of steel part to be heated, induction coil and air.Wherein, to be added
Hot steel part is cylindrical steel rods 1, and induction coil is circle spiral coil 2.
The shape of induction coil depends on the shape of steel part to be heated.In other embodiments, when steel part to be heated is steel
When plate, then induction coil can be designed as ellipse spiral shape；When steel part to be heated is square bar, then induction coil can design
For square spiral shape；When steel part to be heated is rectangle steel, then induction coil can be designed as rectangular coil shape.Line of induction cast
Shape does profiling processing according to the shape of heated work pieces to be added.
Sensing heating emulation mode according to the ... of the embodiment of the present invention, includes the following steps.
Step 1：Finite element electromagnetic induction heating process simulation model is established using finite element software, specifically includes following step
Suddenly.
Step 1.1：The a quarter of modulus type is modeled.As described above, in the present embodiment, which includes by waiting for
The system for heating rod iron and circle spiral shape induction coil composition, rod iron are inserted into induction coil.
Step 1.2：Geometry mould is created or read in from other modeling softwares using the front processor of finite element software itself
Type.
Step 1.3：In electromagnetic field analysis part, far-field region edge magnetic potential is set as zero, rod iron center applies magnetic force
Line parallel boundary condition, it is zero that corresponding magnetic potential, which is arranged, on the plane of symmetry, and excitation ource electric current is applied on the section of induction coil, with
Excitation condition as magnetic field.
Step 1.4：The resistivity and relative permeability of rod iron in 20 DEG C of -1000 DEG C of temperature ranges are defined, induction coil
Resistivity and relative permeability, the relative permeability of air.Wherein, for tempered material, 20 DEG C of -600 DEG C of temperature can be defined
Above-mentioned parameter in range；For quenched materials, the above-mentioned parameter in 20 DEG C of -1000 DEG C of temperature ranges can be defined.
Step 1.5：In temperature field analysis part, induction coil and air element are both configured to dummy cell, only calculate steel
The thermal field in stick region, the air initial temperature around rod iron are set as constant；The rod iron surface contacted with air only calculates and sky
The radiant heat exchange that gas grid node carries out.
Step 1.6：Define the thermal coefficient of rod iron, specific heat capacity, density, rod iron surface in 20 DEG C of -1000 DEG C of temperature ranges
Heat emissivity coefficient, Boltzmann's constant.Wherein, it for tempered material, can define above-mentioned in 20 DEG C of -600 DEG C of temperature ranges
Parameter；For quenched materials, the above-mentioned parameter in 20 DEG C of -1000 DEG C of temperature ranges can be defined.
Step 1.7：Divide the grid of rod iron.In one embodiment, the density of grid is passed from the surface of rod iron to center
Subtract, i.e., grid is closeer closer to induction coil.
Step 1.8：The coupling between electromagnetism-heat is carried out using sequential coupling method to calculate, first according to the temperature of primary condition
Field is spent, determines the physical parameter of material, solves electromagnetic problems, thus obtained electromagnetic field output is thermally generated rate, as
Thermal field emulates required heat source input, Temperature calculating is then carried out, while according to the thermo parameters method of rod iron at this time, to repair
The physical parameter of positive rod iron material, then solves electromagnetic field, so recycles, the heating time until reaching setting.
Step 2:Electromagnetic induction heating process simulation emulates.Specifically include following steps.
Step 2.1：Keep output frequency, output current and the output voltage of induction heating power constant, simulation obtains steel
Temperature Distribution after stick heating.
Step 2.2：Judge whether meet the needs of heating process based on Temperature Distribution.If it is determined that meeting heating process
Demand then carries out step 3；If it is determined that being unsatisfactory for the demand of heating process, then after correcting the model, step 1 is carried out again.
Step 3:To the impedance solution procedure analog simulation of induction coil-rod iron system, following steps are specifically included.
Step 3.1：Using finite element analysis software, a quarter of the model is taken to be modeled.
Step 3.2：Geometry mould is created or read in from other modeling softwares using the front processor of finite element software itself
Type.
Step 3.3：In electromagnetic field analysis part, far-field region edge magnetic potential is set as zero, rod iron center applies magnetic force
Line parallel boundary condition, it is zero that corresponding magnetic potential, which is arranged, on the plane of symmetry, and excitation ource electric current is applied on the section of induction coil, with
Excitation condition as magnetic field.
Step 3.4：The resistivity and relative permeability of rod iron in 20 DEG C of -1000 DEG C of temperature ranges are defined, induction coil
Resistivity and relative permeability, the relative permeability of air.Wherein, for tempered material, 20 DEG C of -600 DEG C of temperature can be defined
Above-mentioned parameter in range；For quenched materials, the above-mentioned parameter in 20 DEG C of -1000 DEG C of temperature ranges can be defined.
Step 3.5：Using magnetic field analysis method calculate, simulation obtain induction coil-rod iron system equivalent inductance and
Equivalent resistance.
Step 3.6：Impedance and the benefit of induction heating power are determined according to the equivalent inductance and equivalent resistance of the system
Repay capacitance
Sensing heating emulation mode according to the ... of the embodiment of the present invention has the following advantages：
(1) by carrying out analogue simulation to sensing heating process, the configuration of induction heating power is carried based on analog result
Design cost is saved, while shortening the design cycle of induction heating power to reduce design error for theoretical direction, improved
Design efficiency；
(2) design parameter that can optimize induction coil at any time by analogue simulation, makes its efficiency optimization；
(3) by improving the efficiency of induction heating power, utilization rate of electrical is directly improved, to reach the mesh of energy-saving and emission-reduction
's.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (6)
1. a kind of sensing heating emulation mode, which is characterized in that including：
Step 1：Finite element electromagnetic induction heating process simulation model is established using finite element software, is included the following steps：
Step 1.1：The a quarter of modulus type is modeled, and the model includes being made of steel part, induction coil and air
System, the steel part are inserted into the induction coil；
Step 1.2：Geometry mould is created or read in from other modeling softwares using the front processor of the finite element software itself
Type；
Step 1.3：In electromagnetic field analysis part, far-field region edge magnetic potential is set as zero, the steel part center applies magnetic force
Line parallel boundary condition, it is zero that corresponding magnetic potential, which is arranged, on the plane of symmetry, and excitation ource electric current is applied to the section of the induction coil
On, using the excitation condition as magnetic field；
Step 1.4：Define the resistivity and relative permeability of the steel part in 20 DEG C of -1000 DEG C of temperature ranges, the line of induction
The resistivity and relative permeability of circle, the relative permeability of air；
Step 1.5：In temperature field analysis part, the induction coil and air element are both configured to dummy cell, only calculate institute
The thermal field in steel part region is stated, the air initial temperature around the steel part is set as constant；The steel part table contacted with air
Face only calculates the radiant heat exchange carried out with air-grid node；
Step 1.6：Define the thermal coefficient of the steel part, specific heat capacity, density, the steel part in 20 DEG C of -1000 DEG C of temperature ranges
Heat emissivity coefficient, the Boltzmann's constant on surface；
Step 1.7：Divide the grid of the steel part；
Step 1.8：The coupling between electromagnetism-heat is carried out using sequential coupling method to calculate, first according to the temperature of primary condition
, it determines the physical parameter of material, solves electromagnetic problems, thus obtained electromagnetic field output is thermally generated rate, as heat
Field emulates required heat source input, then carries out Temperature calculating, while according to the thermo parameters method of the steel part at this time, coming
The physical parameter for correcting the steel part material, then solves electromagnetic field, so recycles, the heating time until reaching setting,
Step 2:Electromagnetic induction heating process simulation emulates, including：
Step 2.1：Keep output frequency, output current and the output voltage of induction heating power constant, simulation obtains the steel
Temperature Distribution after part heating；
Step 2.2：Judge whether meet the needs of heating process based on the Temperature Distribution,
Step 3:To the impedance solution procedure analog simulation of the system, including：
Step 3.1：Using the finite element analysis software, a quarter of the model is taken to be modeled；
Step 3.2：Geometry mould is created or read in from other modeling softwares using the front processor of the finite element software itself
Type；
Step 3.3：In electromagnetic field analysis part, far-field region edge magnetic potential is set as zero, the steel part center applies magnetic force
Line parallel boundary condition, it is zero that corresponding magnetic potential, which is arranged, on the plane of symmetry, and excitation ource electric current is applied to the section of the induction coil
On, using the excitation condition as magnetic field；
Step 3.4：Define the resistivity and relative permeability of the steel part in 20 DEG C of -1000 DEG C of temperature ranges, the line of induction
The resistivity and relative permeability of circle, the relative permeability of air；
Step 3.5：It is calculated using the method for magnetic field analysis, simulation obtains the equivalent inductance and equivalent resistance of the system；
Step 3.6：According to the equivalent inductance and equivalent resistance of the system determine the induction heating power impedance and
Compensating electric capacity.
2. sensing heating emulation mode according to claim 1, which is characterized in that in step 1.7, the density of the grid
Successively decreased from the surface of the steel part to center.
3. sensing heating emulation mode according to claim 1, which is characterized in that in step 2.2, if it is determined that meeting
The demand of heating process then carries out step 3；If it is determined that being unsatisfactory for the demand of heating process, then after correcting the model, again
Carry out step 1.
4. sensing heating emulation mode according to claim 1, which is characterized in that
In step 1.4, the resistivity and relative permeability of the steel part in 20 DEG C of -600 DEG C of temperature ranges, the induction are defined
The resistivity and relative permeability of coil, the relative permeability of air；
In step 1.6, the thermal coefficient of the steel part, specific heat capacity, density, the steel in 20 DEG C of -600 DEG C of temperature ranges are defined
Heat emissivity coefficient, the Boltzmann's constant on part surface；And
In step 3.4, the resistivity and relative permeability of the steel part in 20 DEG C of -600 DEG C of temperature ranges, the induction are defined
The resistivity and relative permeability of coil, the relative permeability of air.
5. sensing heating emulation mode according to claim 1, which is characterized in that determine institute according to the shape of the steel part
State the shape of induction coil.
6. sensing heating emulation mode according to claim 5, which is characterized in that the shape of the induction coil includes：
Circle spiral shape, ellipse spiral shape, square spiral shape, rectangular coil shape.
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| CN106529005A (en) * | 2016-10-28 | 2017-03-22 | 南昌航空大学 | Method for designing local tempering induction coil of ultrahigh-strength steel threaded type workpiece based on finite element simulation |
| CN107169166B (en) * | 2017-04-17 | 2020-02-25 | 燕山大学 | Large gear ring mobile induction heating calculation method based on ANSYS simulation platform |
| CN107871037B (en) * | 2017-10-26 | 2020-09-29 | 中国南方电网有限责任公司超高压输电公司广州局 | Method for estimating internal temperature of 35kV dry-type reactor |
| CN108133071A (en) * | 2017-11-08 | 2018-06-08 | 湖南柯立凯科技开发有限公司 | A kind of hot emulation mode of aluminium electrolutic capacitor |
| CN111428378B (en) * | 2020-03-31 | 2022-03-01 | 东北大学 | Resistance heating model applied to thermal field distribution research |
| CN113204848B (en) * | 2021-05-18 | 2022-03-15 | 燕山大学 | Numerical simulation method for induction heating process of large-modulus rack |
| CN113255191A (en) * | 2021-06-10 | 2021-08-13 | 大连理工大学 | Equivalent circuit parameter identification method of induction heating model |
| CN114861504A (en) * | 2022-06-07 | 2022-08-05 | 哈尔滨理工大学 | Induction heating magnetic circuit design method and device |
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