CN107992703A - A kind of UI/UU air-gap-free inductance intelligent design systems and method based on bar shaped magnetic core - Google Patents
A kind of UI/UU air-gap-free inductance intelligent design systems and method based on bar shaped magnetic core Download PDFInfo
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- CN107992703A CN107992703A CN201711400472.6A CN201711400472A CN107992703A CN 107992703 A CN107992703 A CN 107992703A CN 201711400472 A CN201711400472 A CN 201711400472A CN 107992703 A CN107992703 A CN 107992703A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
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Abstract
The present invention relates to a kind of UI/UU air-gap-free inductance intelligent design systems and method based on bar shaped magnetic core, belong to inductor design technical field.The method of the present invention is suitable for the inductance of single-phase chopper circuit.The present invention draws inductor size by the copper thickness round-robin algorithm that is nested in the close circulation of electricity, then limited magnetic core splicing is carried out according to existing magnetic core size, it may finally be carried out according to requirements such as minimum volume, minimum cost, minimum weights preferentially, solve the problems, such as the nonstandard Magnetic Core Design under no standard core, and the inductor design scheme of different levels can be quickly generated out.
Description
Technical Field
The invention belongs to the technical field of inductance design, and relates to a UI/UU air-gap-free inductance intelligent design system and method based on a strip-shaped magnetic core.
Background
(1) With the rapid development of power electronic technology, various power electronic devices are more and more widely applied in the fields of power systems, transportation, industry and the like, the high speed, miniaturization and integration of the power electronic devices are the main development directions of the power electronic devices, and the performance and volume of the inductance power electronic devices, the performance of the inductance power electronic devices and the size and performance of equipment are directly influenced.
(2) For a relatively large inductor, a proper standard magnetic core cannot be found generally, and the standard magnetic core is formed by freely splicing strip-shaped magnetic cores, the traditional magnetic core design depends on the experience of engineers, different schemes need to be repeatedly calculated, and a better design scheme is determined, so that an algorithm which can freely splice the inductor magnetic core and generate the optimal scheme is very important.
Disclosure of Invention
In view of the above, the present invention provides a system and a method for intelligently designing a UI/UU gapless inductor based on a strip-shaped magnetic core,
in order to achieve the purpose, the invention provides the following technical scheme:
a UI/UU air-gap-free inductance intelligent design system based on a strip-shaped magnetic core comprises a database module, a calculation module and a result storage table;
the database module comprises a magnetic core material database, a strip-shaped magnetic core shape database and an ERP/cost database;
the calculation module comprises an inductance calculation module, a magnetic core splicing module and a result optimization module, wherein the inductance calculation module reads data of a magnetic core material database, calculates according to input parameters to obtain an inductance initial calculation table and stores the inductance initial calculation table in the result storage table;
the magnetic core splicing module reads the data of the inductance initial calculation table and the strip-shaped magnetic core shape database to carry out magnetic core splicing to obtain a magnetic core splicing table, and the magnetic core splicing table is stored in the result storage table;
the result optimizing module reads data of the magnetic core splicing table and the ERP/cost database to optimize magnetic core data to obtain a single-material optimal table, and stores the single-material optimal table in the result storage table;
and the result storage table also stores a finally selected optimal scheme table.
Further, the magnetic core material database includes: material name, material type, permeability curve and B-P loss curve;
the strip core shape database includes: a magnetic core material having a length, width, height and density;
the ERP/cost database contains prices per unit mass of the magnetic core.
Further, the input parameters comprise necessary input parameters and optional input parameters,
the necessary input parameters include: the method comprises the following steps of (1) obtaining a current effective value, a maximum current, an inductance average current, a target inductance value, a window utilization rate, a maximum working flux density, a maximum temperature rise, a maximum space width, a maximum space length and a maximum space height;
the selectable input parameters include: the distance from the winding to the end of the magnetic core, the distance between the iron core and the inner side of the winding in the length direction, the distance between the iron core and the inner side of the winding in the width direction, the insulation thickness between the windings, the gap between the windings and the heat exchange coefficient.
Further, the method specifically comprises the following steps:
s1: setting input parameters, and selecting a magnetic core with one material type from a magnetic core material database;
s2: calculating inductance parameters of the selected magnetic cores according to the input parameters;
s3: performing magnetic core splicing calculation on the selected magnetic core according to the result of inductance parameter calculation;
s4: selecting single materials for the magnetic core splicing calculation result according to the cost;
s5: judging the materials in the magnetic core material database, if other types of materials meeting the requirements exist, turning to the step S2, and if the materials do not exist, performing the step S6;
s6, optimal scheme optimization is carried out, and an optimal scheme table is output.
Further, step S2 includes the steps of:
s21: initial current density J = J 0 Wherein J 0 Setting the current density value as a set current density value;
s22: calculating the sectional area of copper foil conductorWherein I rms Is the effective value of the current;
s23: calculating magnetic core A p The value:
wherein, I L Is the average current of the inductor, I max At maximum current, B max At maximum working flux density, L 0 Is a target inductance, k u The window utilization rate;
s24: initializing the width of the copper foil,
w w ＝w w0
wherein H s At maximum spatial height, L d The distance from the winding to the end of the magnetic core is the empty distance;
s25: the height of the copper foil and the height of the window are calculated,
b＝w h +2L d
wherein, w h Is the copper foil height, b is the window height;
s26: iterating the number of turns of the winding, and calculating the structural parameters of the air-gap-free UI magnetic core under the space constraint condition;
s27: checking whether the width and height of the inductor exceed constraint conditions, checking whether the inductance value and the temperature rise meet requirements, if so, entering S27-1, and if not, entering S27-2;
s27-1: calculating the cost, weight and volume of the inductor, and recording the scheme into an initial inductance calculation list;
s27-2: if the height of the magnetic core window is larger than the minimum value of the height of the window, and the width of the copper foil is smaller than the maximum value, the width w of the copper foil is increased w ＝w w +w wstep Wherein w is wstep Returning to the step S25 for the increment of the width each time;
s28: and judging whether the current density is greater than the maximum current density, if so, ending the process, otherwise, updating the current density, and returning to the step S2.
Further, step S26 includes the steps of:
s261: number of initial winding turns N = N 0 ；
S262: calculating the structural parameters of the magnetic core according to the number of turns of the winding;
a＝[N×w w +(N-1)×L ins ]×1.15+2×L tw +L tx
c＝Ls-a+L tx +2×L tw -2×L tc
h＝A p ×10 4 /(a×b×c)
l c ＝2a+2b+πh
wherein a is the window width, c is the core length, h is the core thickness, L c Is the length of the magnetic circuit, L ins Thickness of interlayer insulating paper, L tw Is the distance between the iron core and the inner side of the winding in the length direction, L tc The distance between the iron core and the inner side of the winding in the width direction, L tx Is a gap between windings;
s263: calculating the actual inductance value
Wherein, L is the actual inductance value, B is the magnetic field intensity;
s264: and calculating whether the deviation between the actual inductance value and the target inductance value meets the requirement, if the deviation of the inductance is larger than the deviation of the inductance when the winding is wound by N-1 turns, performing step S28, and if the deviation of the inductance is not larger than the deviation of the inductance when the winding is wound by N-1 turns, enabling N = N +1, and performing step S261.
Further, step S3 specifically includes the following steps:
s31: accessing a strip-shaped magnetic core material library, selecting the strip-shaped magnetic core under the material model, and taking the strip-shaped magnetic core ar with the size larger than and closest to the thickness h of the magnetic core 1 Taking a bar-shaped magnetic core ar with the size less than and closest to the thickness h of the magnetic core 2 If the magnetic core with the thickness of just h is adopted as ar 3 Namely:
s32: from a given ar i In the middle from small to largeBr of outgoing magnetic core j Wherein br j J is the width of the jth strip-shaped magnetic core in the strip-shaped magnetic core material library, J is more than or equal to 1 and less than or equal to J, and J is the total number of all strip-shaped magnetic cores meeting the S31 condition;
s33: according to each br in S32 j The small to large lists hr k Wherein hr is k Setting the length of the kth strip-shaped magnetic core in the strip-shaped magnetic core material library, wherein K is more than or equal to 1 and less than or equal to K, and K is the sum of the total number of all strip-shaped magnetic cores meeting the S32 condition and the magnetic cores meeting the S32 condition through splicing;
s34: the size of the splicing inductor is calculated,
the number of strip-shaped magnetic cores in the length direction is as follows:
rounding the upper part and the lower part, wherein the length of the spliced inductance magnetic core is C = Nc m ×br j ；
The quantity of the strip-shaped magnetic cores in the height direction is as follows:
rounding up and down, and setting the window height of the spliced inductance core to be B = Nb n ×hr k ；
The number of strip-shaped magnetic cores in the width direction is:
rounding the upper part and the lower part, wherein the width of the spliced inductance magnetic core is A = Na p ×hr k ；
S35: and calculating the spliced inductor, obtaining a temperature rise delta according to the spliced inductance value L, judging whether the temperature rise delta exceeds a temperature rise threshold value, if not, calculating the volume of the magnetic core, the volume of the winding and the actual external dimension of the inductor, inputting the splicing scheme into a magnetic core splicing table, and if the temperature rise threshold value is exceeded, executing the step S31 until all the circulation is completed, and exiting the magnetic core splicing process.
Further, the calculation formulas of the core volume, the winding volume and the actual inductance outline size in step S35 are as follows:
magnetic core volume:
V c ＝∑N i V i
wherein N is i For splicing the number of magnetic cores, V i The volume of a single spliced magnetic core;
actual length of the inductor:
L z ＝A+C
actual width of the inductor:
W z ＝2A-2Wc
actual height of the inductor:
H z ＝B+2Wc
total volume of winding:
V w ＝[(2W c +2C+0.5 π (A-2W c ))×N]×A w 。
further, step S4 specifically includes: selecting an inductor in a magnetic core splicing table, selecting three schemes of minimum volume, minimum weight and minimum cost, and counting in a single-material optimal table;
inductance volume:
V z ＝L z ×W z ×H z
inductance weight:
M＝V c ×ρ c +V w ×ρ w
where ρ is c Is the inductance core density, ρ w Is the inductance winding density;
the cost of the inductor is as follows:
W＝M c ×W c +M w ×W w
wherein, M c Is the quality of the inductor core, W c Unit price for inductor core, M w For the quality of the inductor winding, W w The inductance winding is monovalent.
The invention has the beneficial effects that: the invention aims at the strip-shaped magnetic core spliced UI/UU magnetic core shaped single-phase air-gap-free copper foil inductor, and forms an intelligent design method under the constraint of the external shape space size.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a system framework diagram of the present invention;
FIG. 2 is a diagram of the inductor core structure of the present invention;
FIG. 3 is a schematic view of a bar core of the present invention;
FIG. 4 is a flow chart of the method of the present invention;
FIG. 5 is a flow chart of inductance parameter calculation according to the present invention;
FIG. 6 is a flow chart of magnetic core splicing according to the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in FIG. 1, the system of the present invention comprises three modules, namely, a database module, a calculation module and a result storage table. The database module comprises a magnetic core material database, a strip-shaped magnetic core shape database and an ERP/cost database;
wherein, magnetic core material database includes: material name, material type, permeability curve (BH curve, DC offset curve), B-P loss curve, etc.;
the strip core shape database includes: magnetic core material, the length, width and height of the magnetic core, fig. 3 is a schematic diagram of the strip-shaped magnetic core of the invention, as shown in fig. 3, wherein ar is thickness i, br is thickness ii, hr is length, and ar is not more than br, the material is arranged according to the three-level ascending order of ar, br and hr, and the density;
the ERP/cost database mainly comprises: and the unit mass price of the magnetic core.
The calculation module comprises: the device comprises an inductance calculation module, a magnetic core splicing module and a result optimization module.
The result preservation table includes: an inductance initial calculation table, a magnetic core splicing table, a single material optimal table and an optimal scheme table.
The invention also comprises input parameters, wherein the input parameters comprise necessary input parameters and optional input structure parameters;
1) The parameters must be entered: effective value of current I rms (A) Maximum current I max (A) Average current of inductor I L (A) Target inductance L (mH), window utilization k u Maximum working magnetic flux density B max (T), maximum temperature rise DeltaT, maximum space width W s (mm), maximum space length L s (mm), maximum spatial height H s (mm)，
2) Optional input structural parameters: winding to core end gap distance L d (mm), the distance L between the iron core and the inner side of the winding in the length direction tw (mm), the distance L in the width direction between the iron core and the inner side of the winding tc (mm), inter-winding insulation thickness L ins (mm), inter-winding space L tx And a heat transfer coefficient α.
As shown in fig. 4, the method of the present invention comprises the following steps:
(1) Selecting a magnetic core of a certain material type from a magnetic core material database;
(2) Inductance parameter calculation
(3) Magnetic core splicing calculation
(4) Single material result preference
(5) If other types of materials exist in the material library, the materials are designated, and the steps (2), (3) and (4) are carried out;
(6) Optimization of the best solution
Accessing a single-material optimal table of each material, selecting three schemes of minimum volume, minimum weight and minimum cost in all schemes in the optimal alternative table, and putting the schemes into the optimal scheme table;
(7) And outputting the result in the optimal scheme table, and selecting whether to output the inductance initial calculation table, the magnetic core splicing table and the single-material optimal scheme table by a user.
The inductance parameter calculation in the step (2) is performed in an inductance calculation module, as shown in fig. 5, and specifically includes the following steps:
1. initialization density J = J 0 (A/mm 2 ) Usually, it is advisable J 0 =2 or a self-setting value;
2. calculating the cross-sectional area Aw (mm 2) of the copper foil wire:calculating magnetic core A p The value of the sum of the values,
3. initializing copper foil width w w ＝w w0 (mm)，
Wherein L is d End-to-end clearance, i.e., the winding-to-core end-to-end clearance, if no input, defaults to 5, and maximum space height H s Rounding up;
4. calculating the height w of the copper foil h Calculating the window height b (mm);
w h ＝A w /w w
b＝w h +2L d
5. iteration winding turns N, and calculating the structural parameters of the air-gap-free UI magnetic core under the space constraint condition;
A. number of initial winding turns N = N 0 Usually N 0 ＝1；
B. Calculating the structural parameters of the magnetic core according to the number of turns of the winding: window width a (mm), core length c (mm), core thickness h (mm), magnetic path length l c (mm)
a＝[N×w w +(N-1)×L ins ]×1.15+2×L tw +L tx
c＝Ls-a+L tx +2×L tw -2×L tc
h＝A p ×10 4 /(a×b×c)
l c ＝2a+2b+πh
Wherein L is tw The distance between the iron core and the inner side of the winding in the length direction is set to be 5 by default
L tc The distance between the iron core and the inner side of the winding in the width direction is set to be 5 by default
L ins The thickness of the interlayer insulating paper is 0.08 by default
L tx For the inter-winding gap, 0.16 is assumed by default.
C. The current magnetic field strength is calculated,wherein H c (A/m) is the current magnetic field strength,
the actual inductance value is calculated as L (mH),wherein the magnetic field strength B (T), B = f (H) c ) Searching a corresponding numerical value through a B-H curve or a DC offset curve of the material in a magnetic core material database;
D. calculating whether the inductance deviation meets the requirement, if the inductance deviation is larger than the inductance deviation when the winding is wound by N-1 turns (the initial deviation is set to be infinite), performing the step 8, otherwise, enabling N = N +1, and returning to the step 5;
6. checking whether the width and the height of the inductor exceed constraint conditions, calculating the loss and the temperature rise of the inductor, checking whether the temperature rise of the inductor meets the requirements, and if the checking is passed, storing the scheme into an inductor initial calculation table.
7. If the core window height is greater than the minimum window height, i.e. b > b min While the width of the copper foil is less than a maximum value, i.e. w w ＜w wmax Increasing the width, w, of the copper foil w ＝w w +w wstep And returning to the step 4, and calculating the inductance scheme for reducing the height.
8. Judging whether the current electric density J is larger than the maximum electric density J or not max Such as J>J max Then the flow is ended; if J is less than or equal to J max Then J is increased, i.e. J = J + J step Returning to step 2, the iterative calculation continues, usually J step It may take 1mm.
As shown in fig. 6, step (3) includes the following steps:
1. accessing a bar-shaped magnetic core material library, selecting a bar-shaped magnetic core under the material, taking the bar-shaped magnetic core ar with the size larger than and closest to h according to the thickness h of the magnetic core, wherein the schematic diagram of the bar-shaped magnetic core is shown in figure 3 1 Taking a bar-shaped magnetic core ar with the size less than and closest to h 2 If the size of the magnetic core is exactly equal to h, then ar is taken 2 H is = h, i.e
After taking value, the actual sheet width of the magnetic core is W c ＝ar i
2. From a given ar i Medium selection br j (j =1, \8230;, Z where Z is ar i Total br size)
3. From the designation br j Middle selection for hr k (K =1, \ 8230;, K, where K is ar i 、br j Size of the product k Total of) wherein hr k Can be the length of a single strip-shaped magnetic core or a plurality of ar i And br j Splicing the strip-shaped magnetic cores with the same size;
4. calculating the size of the splicing inductor;
A. the number of strip-shaped magnetic cores in the length direction of the inductor is as follows:
namely, the numerical value in the thickness direction of the inductor is divided by the thickness value of the strip-shaped magnetic core to obtain an integral value; the length of the spliced inductance core is C = Nc m ×br j
B. The number of strip-shaped magnetic cores in the height direction of the inductor is as follows:
namely, the numerical value in the height direction of the inductor is divided by the height value of the strip-shaped magnetic core to obtain an integral value; the height of the spliced inductance core window is B = Nb n ×hr k
C. The number of strip-shaped magnetic cores in the width direction of the inductor is as follows:
namely, the numerical value in the width direction of the inductor is divided by the thickness value of the strip-shaped magnetic core to obtain an integral value; the width of the spliced inductance core is A = Na p ×hr k 。
Rounding the upper part and the lower part, and ensuring the width of the spliced inductor to be A = Na p ×hr k Width of magnetic core A middle hr k Can be spliced with the height B of the magnetic core for a middle hr k Different as shown in fig. 2.
5. And calculating the spliced inductor, calculating inductance L and temperature rise delta according to the new structure size, and verifying whether the size, L and delta of the inductor meet the constraint condition.
Inductance L is
Calculating inductance loss, temperature rise and inductance loss P by using a general formula sum = core loss P c + winding loss P w Magnetic core loss P c The calculation can be performed using the steinmetz equation, the winding loss is the total loss value after considering the skin effect and the proximity effect,
temperature rise:wherein alpha is a heat exchange coefficient and can be selected according to an empirical value; a. The i The surface area of the inductor;
A i ＝2(L z ×W z +W z ×H z +L z ×H)
if the conditions are satisfied, calculating the volume of the magnetic core, the volume of the winding and the actual external dimension of the inductor, inputting the splicing scheme (including the number and the position of each magnetic core) into an inductor splicing table, and if the conditions are not satisfied, continuing to perform hr k 、br j 、ar i And circulating until all circulation is completed, and exiting the magnetic core splicing process.
The core volume is the sum of the product of the volume and the number of all the cores used: v c ＝∑N i V i
Actual length of the inductor: l is a radical of an alcohol z ＝A+C
Actual width of the inductor: w is a group of z ＝2A-2W c
Actual height of the inductor: h z ＝B+2W c
Total volume of winding: v w ＝[(2W c +2C+0.5π(A-2W c ))×N]×A w
The step (4) comprises the following steps:
selecting an inductor in an inductor splicing table, selecting three schemes of minimum volume, minimum weight and minimum cost, recording the three schemes into a single-material optimal table, and selecting whether the table is output or not;
inductance volume: v z ＝L z ×W z ×H z Wherein L is z 、W z 、H z In order to achieve the practical length, width and height of the inductor,
inductance weight: m = V c ×ρ c +V w ×ρ w In which V is c Volume of the inductor core, ρ c Is the density of the inductor core, V w Volume of the inductor winding, p w Is the density of the inductor windings;
the cost of the inductor is as follows: w = M c ×W c +M w ×W w Of which M is c Mass of inductor core, W c The data can be from an enterprise ERP system or the like for the unit mass price of the inductance coreDatabase of materials, M w Being the mass of the inductor winding, W w This data may come from an enterprise ERP system or a cost database for the price per unit mass of the inductive winding.
The invention aims at the bar-shaped magnetic core spliced UI/UU magnetic core shaped single-phase air-gap-free copper foil inductor, and forms an intelligent design method under the constraint of the external space size.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides a UI/UU does not have air gap inductance intelligence design system based on bar magnetic core which characterized in that: the system comprises a database module, a calculation module and a result storage table;
the database module comprises a magnetic core material database, a strip-shaped magnetic core shape database and an ERP/cost database;
the calculation module comprises an inductance calculation module, a magnetic core splicing module and a result optimization module, wherein the inductance calculation module reads data of a magnetic core material database, calculates according to input parameters to obtain an inductance initial calculation table and stores the inductance initial calculation table in the result storage table;
the magnetic core splicing module reads the data of the inductance initial calculation table and the strip-shaped magnetic core shape database to carry out magnetic core splicing to obtain a magnetic core splicing table, and the magnetic core splicing table is stored in the result storage table;
the result optimizing module reads data of the magnetic core splicing table and the ERP/cost database to optimize magnetic core data to obtain a single-material optimal table, and the single-material optimal table is stored in the result storage table;
and the result storage table also stores a finally selected optimal scheme table.
2. The UI/UU air-gap-free inductance intelligent design system based on the strip-shaped magnetic core as claimed in claim 1, wherein: the magnetic core material database includes: material name, material type, permeability curve and B-P loss curve;
the strip core shape database includes: a magnetic core material having a length, width, height and density;
the ERP/cost database contains prices per unit mass of the magnetic core.
3. The intelligent UI/UU air-gap-free inductance design system based on the strip-shaped magnetic core as claimed in claim 1, wherein: the input parameters include essential input parameters and optional input parameters,
the necessary input parameters include: the method comprises the following steps of (1) obtaining a current effective value, a maximum current, an inductance average current, a target inductance value, a window utilization rate, a maximum working flux density, a maximum temperature rise, a maximum space width, a maximum space length and a maximum space height;
the selectable input parameters include: the distance from the winding to the end of the magnetic core, the distance between the iron core and the inner side of the winding in the length direction, the distance between the iron core and the inner side of the winding in the width direction, the insulation thickness between the windings, the gap between the windings and the heat exchange coefficient.
4. A UI/UU air-gap-free inductance intelligent design method based on a strip-shaped magnetic core is characterized by comprising the following steps: the method specifically comprises the following steps:
s1: setting input parameters, and selecting a magnetic core with one material type from a magnetic core material database;
s2: calculating inductance parameters of the selected magnetic cores according to the input parameters;
s3: performing magnetic core splicing calculation on the selected magnetic core according to the calculation result of the inductance parameter;
s4: selecting single materials for the magnetic core splicing calculation result according to the cost;
s5: judging the materials in the magnetic core material database, if other types of materials meeting the requirements exist, turning to the step S2, and if the materials do not exist, performing the step S6;
s6, optimal scheme optimization is carried out, and an optimal scheme table is output.
5. The intelligent design method of the UI/UU air-gap-free inductance based on the strip-shaped magnetic core as claimed in claim 4, wherein the method comprises the following steps: step S2 includes the following steps:
s21: initial current density J = J 0 Wherein J 0 Setting the current density value;
s22: calculating the sectional area of copper foil conductorIn which I rms Is the effective value of the current;
s23: calculating magnetic core A p The value:
wherein, I L Is the average current of the inductor, I max At maximum current, B max At maximum working flux density, L 0 To target inductance, k u The window utilization rate is obtained;
s24: initializing the width of the copper foil,
w w ＝w w0
wherein H s At maximum spatial height, L d The distance from the winding to the end of the magnetic core is the empty distance;
s25: the height of the copper foil and the height of the window are calculated,
b＝w h +2L d
wherein, w h Is the copper foil height, b is the window height;
s26: iterating the number of turns of the winding, and calculating the structural parameters of the air-gap-free UI magnetic core under the space constraint condition;
s27: checking whether the width and height of the inductor exceed constraint conditions, checking whether the inductance value and the temperature rise meet requirements, if so, entering S27-1, and if not, entering S27-2;
s27-1: calculating the cost, weight and volume of the inductor, and recording the scheme into an initial inductance calculation list;
s27-2: if the height of the magnetic core window is larger than the minimum value of the height of the window, and the width of the copper foil is smaller than the maximum value, the width w of the copper foil is increased w ＝w w +w wstep Wherein w is wstep Returning to step S25 for each increase in width;
s28: and judging whether the current density is greater than the maximum current density, if so, ending the process, otherwise, updating the current density, and returning to the step S2.
6. The intelligent design method of the UI/UU air-gap-free inductance based on the strip-shaped magnetic core as claimed in claim 5, wherein the method comprises the following steps: step S26 includes the steps of:
s261: number of initial winding turns N = N 0 ；
S262: calculating the structural parameters of the magnetic core according to the number of turns of the winding;
a＝[N×w w +(N-1)×L ins ]×1.15+2×L tw +L tx
c＝Ls-a+L tx +2×L tw -2×L tc
h＝A p ×10 4 /(a×b×c)
l c ＝2a+2b+πh
wherein a is the window width, c is the magnetic core length, h is the magnetic core thickness, L c Is the length of the magnetic circuit, L ins Thickness of interlayer insulating paper, L tw Is the distance between the iron core and the inner side of the winding in the length direction, L tc The distance between the iron core and the inner side of the winding in the width direction, L tx Is a gap between windings;
s263: calculating the actual inductance value
Wherein, L is the actual inductance value, B is the magnetic field intensity;
s264: and calculating whether the deviation between the actual inductance value and the target inductance value meets the requirement, if the deviation of the inductance is larger than the deviation of the inductance when the winding is wound by N-1 turns, performing step S28, and if the deviation of the inductance is not larger than the deviation of the inductance when the winding is wound by N-1 turns, enabling N = N +1, and performing step S261.
7. The intelligent design method of the UI/UU air-gap-free inductance based on the strip-shaped magnetic core as claimed in claim 6, wherein: step S3 specifically includes the following steps:
s31: accessing a strip-shaped magnetic core material library, selecting the strip-shaped magnetic core under the material model, and taking the strip-shaped magnetic core ar with the size larger than and closest to the thickness h of the magnetic core 1 Taking a bar-shaped magnetic core ar with the size less than and closest to the thickness h of the magnetic core 2 If the magnetic core with the thickness of just h is adopted as ar 3 Namely:
s32: from a given ar i Br of magnetic core listed from small to large in sequence j Wherein br j The width of the jth strip-shaped magnetic core in the strip-shaped magnetic core material library is larger than or equal to 1 and smaller than or equal to J, and J is the total number of all strip-shaped magnetic cores meeting the S31 condition;
s33: according to each br in S32 j The small to large lists hr k Wherein hr is k Setting the length of the kth strip-shaped magnetic core in the strip-shaped magnetic core material library, wherein K is more than or equal to 1 and less than or equal to K, and K is the sum of the total number of all strip-shaped magnetic cores meeting the S32 condition and the magnetic cores meeting the S32 condition through splicing;
s34: the size of the splicing inductor is calculated,
the number of strip-shaped magnetic cores in the length direction is as follows:
rounding the upper part and the lower part, wherein the length of the spliced inductance core is C = Nc m ×br j ；
The quantity of the strip-shaped magnetic cores in the height direction is as follows:
rounding up and down, and setting the window height of the spliced inductance core to be B = Nb n ×hr k ；
The number of strip-shaped magnetic cores in the width direction is:
rounding the upper part and the lower part, wherein the width of the spliced inductance magnetic core is A = Na p ×hr k ；
S35: calculating the spliced inductance, obtaining a temperature rise delta according to the spliced inductance value L, judging whether the temperature rise delta exceeds a temperature rise threshold value, if not, calculating the volume of the magnetic core, the volume of the winding and the actual external dimension of the inductance, inputting the splicing scheme into a magnetic core splicing table, and if the temperature rise delta exceeds the temperature rise threshold value, executing the step S31 until all circulation is completed, and exiting the magnetic core splicing process.
8. The intelligent design method of the UI/UU air-gap-free inductance based on the strip-shaped magnetic core as claimed in claim 7, wherein: in step S35, the calculation formulas of the volume of the magnetic core, the volume of the winding, and the actual external dimensions of the inductor are as follows:
magnetic core volume:
V c ＝∑N i V i
wherein N is i For splicing magnetic coresNumber of (2), V i Is the volume of a single spliced magnetic core;
actual length of the inductor:
L z ＝A+C
actual width of the inductor:
W z ＝2A-2Wc
actual height of the inductor:
H z ＝B+2Wc
total volume of winding:
V w ＝[(2W c +2C+0.5π(A-2W c ))×N]×A w 。
9. the intelligent design method of the UI/UU air-gap-free inductance based on the strip-shaped magnetic core as claimed in claim 8, wherein: step S4 specifically includes: selecting an inductor in a magnetic core splicing table, selecting three schemes of minimum volume, minimum weight and minimum cost, and counting in a single-material optimal table;
inductance volume:
V z ＝L z ×W z ×H z
inductance weight:
M＝V c ×ρ c +V w ×ρ w
where ρ is c Is the inductance core density, ρ w Is the inductance winding density;
the cost of the inductor is as follows:
W＝M c ×W c +M w ×W w
wherein M is c Is the quality of the inductor core, W c For the inductance core unit price, M w For the quality of the inductor winding, W w The inductance winding is monovalent.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109698066A (en) * | 2019-03-06 | 2019-04-30 | 中国科学院重庆绿色智能技术研究院 | A kind of UI, UU type silicon steel sheet magnetic core band air gap inductance non-standard de-sign method |
| CN114999813A (en) * | 2022-06-14 | 2022-09-02 | 成都斯普奥汀科技有限公司 | Design method for improving inductance in wireless charging system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321946A (en) * | 2000-04-27 | 2001-11-14 | 株式会社益康系统 | System and method for material evaluation using two-dimension computer-aided design interface |
| CN101930223A (en) * | 2010-09-07 | 2010-12-29 | 曾谊晖 | Intelligent screening system based on numerical control processing technology for difficult-to-machine metal |
| CN104636554A (en) * | 2015-02-06 | 2015-05-20 | 福州大学 | Novel design method of intelligent alternating-current and direct-current electromagnetic apparatus |
| CN105488898A (en) * | 2013-10-28 | 2016-04-13 | 东莞市清大曜嘉信息技术有限公司 | Internet query verification method for antiferromagnetic resonance identifier |
| US9613743B2 (en) * | 2014-10-10 | 2017-04-04 | Cooper Technologies Company | Optimized electromagnetic transformer component design and methods including improved conductivity composite conductor material |
-
2017
- 2017-12-22 CN CN201711400472.6A patent/CN107992703B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321946A (en) * | 2000-04-27 | 2001-11-14 | 株式会社益康系统 | System and method for material evaluation using two-dimension computer-aided design interface |
| CN101930223A (en) * | 2010-09-07 | 2010-12-29 | 曾谊晖 | Intelligent screening system based on numerical control processing technology for difficult-to-machine metal |
| CN105488898A (en) * | 2013-10-28 | 2016-04-13 | 东莞市清大曜嘉信息技术有限公司 | Internet query verification method for antiferromagnetic resonance identifier |
| US9613743B2 (en) * | 2014-10-10 | 2017-04-04 | Cooper Technologies Company | Optimized electromagnetic transformer component design and methods including improved conductivity composite conductor material |
| CN104636554A (en) * | 2015-02-06 | 2015-05-20 | 福州大学 | Novel design method of intelligent alternating-current and direct-current electromagnetic apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109698066A (en) * | 2019-03-06 | 2019-04-30 | 中国科学院重庆绿色智能技术研究院 | A kind of UI, UU type silicon steel sheet magnetic core band air gap inductance non-standard de-sign method |
| CN109698066B (en) * | 2019-03-06 | 2021-01-12 | 中国科学院重庆绿色智能技术研究院 | Non-standard design method for gap inductance of UI and UU type silicon steel sheet magnetic core belt |
| CN114999813A (en) * | 2022-06-14 | 2022-09-02 | 成都斯普奥汀科技有限公司 | Design method for improving inductance in wireless charging system |
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