CN102364481A - Modeling method and device for magnetic bead simulation model - Google Patents
Modeling method and device for magnetic bead simulation model Download PDFInfo
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- CN102364481A CN102364481A CN2011103292489A CN201110329248A CN102364481A CN 102364481 A CN102364481 A CN 102364481A CN 2011103292489 A CN2011103292489 A CN 2011103292489A CN 201110329248 A CN201110329248 A CN 201110329248A CN 102364481 A CN102364481 A CN 102364481A
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Abstract
The invention discloses a modeling method and a modeling device for a magnetic bead simulation model. The method comprises the following steps of: constructing a magnetic bead simulation model structure; acquiring a fitted value of an element, of which the value cannot be determined according to a magnetic bead data manual, from the magnetic bead simulation model structure by searching; and performing global optimization on the fitted value to acquire a simulation value of the corresponding element. The device comprises a model structure construction module and a search module. By the method and the device, the modeling precision and the simulation accuracy of the magnetic bead simulation model are improved.
Description
Technical field
The present invention relates to electronic information technical field, relate in particular to a kind of magnetic bead simulation model modeling method and device.
Background technology
Along with improving constantly of signal rate, various signal integrities and power supply integrity issue are more and more outstanding on the veneer.For guaranteed performance and reduce power consumption, chip manufacturer uses the multivoltage track configurations and analog power and digital power is separated, and each voltage rail all needs independent the power supply.Simultaneously, functional module integrated on the veneer is more and more, needs the very many supply modules of configuration on the veneer, often causes arrangement space nervous, has to merge the power supply supply network in the single board design.When the digital power of analog power and identical electric pressure merges, for guaranteeing the analog power power supply quality, need to add the power filter network, magnetic bead filtering is a kind of filter network form commonly used.In this case, through the emulation assessment magnetic bead filter network performance and the accurate quality of prognosis modelling power supply, improve to reducing to design risk that to be designed to power extremely important.
Magnetic bead is employed in the Ferrite Material sintering that high band has the good resistance characteristic and forms; Being exclusively used in the high frequency noise and the spike that suppress on signal wire, the power lead disturbs; Have the ability and very high resistivity and the magnetic permeability that absorb electrostatic pulse; It is equivalent to resistance and inductance series connection, but resistance value and inductance value are all with change of frequency.Magnetic bead has better High frequency filter characteristic than common inductance, when high frequency, appear resistive, so can in quite wide frequency range, keep higher impedance, thereby improve the frequency modulation filter effect.The magnetic bead kind is a lot, and manufacturer can provide the magnetic bead databook, wherein comprises the impedance of magnetic bead and the curve of frequency relation, i.e. the magnetic bead family curve.
Prior art perhaps becomes inductance to the magnetic bead equivalence when design magnetic bead filter network, perhaps use simple RLC parallel circuit as the magnetic bead realistic model, and there is following problem in this processing mode:
1, the behavioural characteristic of equivalent model behavioural characteristic and magnetic bead differs greatly;
2, use the filtering characteristic error of this model emulation magnetic bead filter network bigger.
Summary of the invention
The objective of the invention is, a kind of magnetic bead simulation model modeling method and device are provided, the model accuracy that exists with the optimization prior art is low, the problem that phantom error is big.
The invention provides a kind of magnetic bead simulation model modeling method, may further comprise the steps:
Make up magnetic bead realistic model structure;
Obtain in the above-mentioned magnetic bead realistic model structure through search, can not confirm the match value of the element of its value according to the magnetic bead databook;
Above-mentioned match value is carried out global optimization, obtain the simulation value of respective element.
Preferably, above-mentioned magnetic bead realistic model structure comprises direct current resistance, first resistance, first inductance, second resistance, second inductance and electric capacity, and above-mentioned first resistance is parallelly connected with first inductance, forms a RL branch road; Above-mentioned second resistance is parallelly connected with second inductance, forms the 2nd RL branch road; An above-mentioned RL branch road is connected with above-mentioned the 2nd RL branch road, forms the 3rd RL branch road; Above-mentioned the 3rd RL branch road is parallelly connected with above-mentioned electric capacity, forms the RLC branch road; Above-mentioned RLC branch road and above-mentioned direct current resistance are connected in series.
Preferably, above-mentionedly obtain in the above-mentioned magnetic bead realistic model structure, can not confirm that the match value step of the element of its value specifically may further comprise the steps according to the magnetic bead databook through search:
According to the magnetic bead databook, confirm the resistance value of above-mentioned direct current resistance;
According to above-mentioned magnetic bead family curve, confirm the estimated value of above-mentioned first resistance and above-mentioned first inductance;
According to the impedance frequency relational expression of an above-mentioned direct current resistance and an above-mentioned RL branch road, above-mentioned first resistance and above-mentioned first inductance are carried out the two-dimensional parameter search, obtain the match value of above-mentioned first resistance and above-mentioned first inductance;
According to the impedance frequency relational expression of above-mentioned direct current resistance and above-mentioned the 3rd RL branch road, above-mentioned second resistance and above-mentioned second inductance are carried out the two-dimensional parameter search, obtain the match value of above-mentioned second resistance and above-mentioned second inductance;
According to the impedance frequency relational expression of above-mentioned direct current resistance and above-mentioned RLC branch road, above-mentioned electric capacity is carried out linear search, obtain the match value of above-mentioned electric capacity.
Preferably, the impedance frequency relational expression of an above-mentioned direct current resistance and a RL branch road is:
Z
1＝abs(R
dc+R
1‖j2πfL
1)；
The impedance frequency relational expression of above-mentioned direct current resistance and the 3rd RL branch road is:
Z
2＝abs(R
dc+R
1‖j2πfL
1+R
2‖j2πfL
2)；
The impedance frequency relational expression of above-mentioned direct current resistance and RLC branch road is:
Z
3＝abs[R
dc+(R
1‖j2πfL
1+R
2‖j2πfL
2)‖(1/j2πfC)]；
Wherein, Z
1Be above-mentioned direct current resistance and resistance value after an above-mentioned RL branch road is connected, Z
2Be above-mentioned direct current resistance and resistance value after above-mentioned the 3rd RL branch road is connected, Z
3Be above-mentioned direct current resistance and resistance value after above-mentioned RLC branch road is connected, abs () representes plural modulo operation, and f is a frequency, R
DcBe the resistance value of above-mentioned direct current resistance, R
1Be the resistance value of above-mentioned first resistance, R
2Be the resistance value of above-mentioned second resistance, L
1Be the inductance value of above-mentioned first inductance, L
2Be the inductance value of above-mentioned second inductance, C is the capacitance of above-mentioned electric capacity.
Preferably, above-mentioned according to the magnetic bead family curve, the estimated value step of obtaining first resistance and first inductance is specially:
Make the corresponding resistance value of the characteristic peak point of above-mentioned magnetic bead, be the maximum estimated value of above-mentioned first resistance;
On above-mentioned magnetic bead family curve, in the frequency band range of a RL branch road, extract characteristics of low-frequency point, read the resistance value of above-mentioned unique point;
According to the resistance value of above-mentioned unique point, calculate the estimated value of above-mentioned first inductance.
Preferably, above-mentioned impedance frequency relational expression according to a direct current resistance and a RL branch road is carried out the two-dimensional parameter search to first resistance and first inductance, and the match value step of obtaining above-mentioned first resistance and above-mentioned first inductance is specially:
On above-mentioned magnetic bead family curve, in the frequency band range of a RL branch road, extract a plurality of unique points, read the resistance value of above-mentioned unique point;
According to the resistance value of above-mentioned direct current resistance and the impedance frequency relational expression of an above-mentioned direct current resistance and a RL branch road, be L in the above-mentioned relation formula with the estimated value of above-mentioned first inductance
1Initial value, be the R in the above-mentioned relation formula
1, L
1The many class values of assignment calculate corresponding Z
1, obtain Z
1Set;
From above-mentioned Z
1Find out the Z that match is arranged with the resistance value of above-mentioned unique point most in the set
1
The Z that finds out
1Corresponding R
1, L
1Be the match value of above-mentioned first resistance and above-mentioned first inductance.
Preferably, above-mentioned impedance frequency relational expression according to direct current resistance and the 3rd RL branch road is carried out the two-dimensional parameter search to second resistance and second inductance, and the match value step of obtaining second resistance and second inductance is specially:
On above-mentioned magnetic bead family curve, in the frequency band range of the 2nd RL branch road, extract a plurality of unique points, read the resistance value of above-mentioned unique point;
According to the resistance value of above-mentioned direct current resistance, the match value of first resistance, the match value of first inductance and the impedance frequency relational expression of above-mentioned direct current resistance and the 3rd RL branch road, be the R in the above-mentioned relation formula
2, L
2The many class values of assignment calculate corresponding Z
2, obtain Z
2Set;
From above-mentioned Z
2Find out the Z that match is arranged with the resistance value of above-mentioned unique point most in the set
2
The Z that finds out
2Corresponding R
2, L
2Be the match value of above-mentioned second resistance and above-mentioned second inductance.
Preferably, above-mentioned impedance frequency relational expression according to direct current resistance and RLC branch road is carried out linear search to electric capacity, and the match value step of obtaining electric capacity is specially:
High band on above-mentioned magnetic bead family curve tuning-points right side extracts a plurality of unique points, reads the resistance value of above-mentioned unique point;
According to the resistance value of above-mentioned direct current resistance, the match value of first resistance, the match value of first inductance, the match value of second resistance, the match value of second inductance and the impedance frequency relational expression of above-mentioned direct current resistance and RLC branch road; Be a plurality of values of C assignment in the above-mentioned relation formula, calculate corresponding Z
3, obtain Z
3Set;
From above-mentioned Z
3Find out the Z that match is arranged with the resistance value of above-mentioned unique point most in the set
3
Above-mentioned Z
3Corresponding C is the match value of above-mentioned electric capacity.
The present invention further provides a kind of magnetic bead realistic model model building device, and said apparatus comprises that model structure makes up module and search module,
Above-mentioned model structure makes up module, is used to make up magnetic bead realistic model structure;
Above-mentioned search module is used for obtaining above-mentioned magnetic bead realistic model structure through search, can not confirm the match value of the element of its value according to the magnetic bead databook, and above-mentioned match value is carried out global optimization, obtains the simulation value of respective element.
Preferably, above-mentioned search module is used for element is carried out one dimension or two-dimensional search.
The present invention has improved magnetic bead realistic model modeling accuracy, makes when in power distribution system, designing the magnetic bead filter network, and the means of preceding emulation have been arranged, and has improved the emulation accuracy.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes a part of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram of magnetic bead simulation model modeling method preferred embodiment of the present invention;
Fig. 2 is the circuit diagram of magnetic bead realistic model structure optimization embodiment of the present invention;
Fig. 3 is a magnetic bead realistic model model building device preferred embodiment theory diagram of the present invention.
Embodiment
In order to make technical matters to be solved by this invention, technical scheme and beneficial effect clearer, clear,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, be the process flow diagram of magnetic bead simulation model modeling method preferred embodiment of the present invention; This enforcement may further comprise the steps:
Step S001: make up magnetic bead realistic model structure;
As shown in Figure 2; It is the circuit diagram of magnetic bead realistic model structure optimization embodiment of the present invention; Comprise direct current resistance Rdc, first resistance R 1, first inductance L 1, second resistance R 2, second inductance L 2 and capacitor C 1, above-mentioned first resistance R 1 is parallelly connected with first inductance L 1, forms a RL branch road; Above-mentioned second resistance R 2 is parallelly connected with second inductance L 2, forms the 2nd RL branch road; An above-mentioned RL branch road is connected with above-mentioned the 2nd RL branch road, forms the 3rd RL branch road; Above-mentioned the 3rd RL branch road is parallelly connected with above-mentioned capacitor C 1, forms the RLC branch road; Above-mentioned RLC branch road and above-mentioned direct current resistance Rdc are connected in series;
Step S002:, confirm the resistance value R of direct current resistance Rdc according to the magnetic bead databook
Dc
Step S003:, confirm the estimated value of first resistance R 1 and first inductance L 1 according to the magnetic bead family curve;
This step specifically may further comprise the steps:
S31: making the corresponding resistance value of the characteristic peak point of magnetic bead, is the maximum estimated value of first resistance R 1;
S32: on the magnetic bead family curve, in the frequency band range of a RL branch road, extract characteristics of low-frequency point, read the resistance value of above-mentioned unique point;
S33:, calculate the estimated value of first inductance L 1 according to the resistance value of above-mentioned unique point.
Step S004: according to the impedance frequency relational expression of a direct current resistance Rdc and a RL branch road:
Z
1＝abs(R
dc+R
1‖j2πfL
1)(1)
First resistance R 1 and first inductance L 1 are carried out the two-dimensional parameter search, obtain the match value of first resistance R 1 and first inductance L 1;
This step specifically may further comprise the steps:
S41: on the magnetic bead family curve, in the frequency band range of a RL branch road, extract a plurality of unique points, read the resistance value of above-mentioned unique point;
S42: according to the resistance value R of direct current resistance Rdc
Dc, be L in the above-mentioned relation formula (1) with the estimated value of first inductance L 1
1Initial value, be above-mentioned R
1, L
1The many class values of assignment calculate corresponding L
1, obtain L
1Set;
S43: from L
1The resistance value of finding out the unique point of extracting with step S41 in the set has the L of match most
1
The L that S44: step S43 finds
1Corresponding R
1, L
1Be the match value of first resistance R 1 and first inductance L 1.
Step S005: according to the impedance frequency relational expression of the 3rd RL branch road:
Z
2＝abs(R
dc+R
1‖j2πfL
1+R
2‖j2πfL
2)(2)
Second resistance R 2 and second inductance L 2 are carried out the two-dimensional parameter search, obtain the match value of second resistance R 2 and second inductance L 2;
This step specifically may further comprise the steps:
S51: on the magnetic bead family curve, in the frequency band range of the 2nd RL branch road, extract a plurality of unique points, read the resistance value of above-mentioned unique point;
S52:, be the R in the above-mentioned relation formula (2) according to the resistance value of direct current resistance Rdc, the match value of first resistance R 1, the match value of first inductance L 1
2, L
2The many class values of assignment calculate corresponding Z
2, obtain Z
2Set;
S53: from Z
2The resistance value of finding out the unique point of extracting with step S51 in the set has the Z of match most
2
The Z that S54: step S53 finds
2Corresponding R
2, L
2Be the match value of second resistance R 2 and second inductance L 2.
Step S006: according to the impedance frequency relational expression of RLC branch road:
Z
3＝abs[R
dc+(R
1‖j2πfL
1+R
2‖j2πfL
2)‖(1/j2πfC)](3)
Capacitor C 1 is carried out linear search, obtain the match value of capacitor C 1;
This step specifically may further comprise the steps:
S61: the high band on above-mentioned magnetic bead family curve tuning-points right side, get a plurality of unique points, read the resistance value of above-mentioned unique point;
S62: according to the resistance value of direct current resistance Rdc, the match value of first resistance R 1, the match value of first inductance L 1, the match value of second resistance R 2, the match value of second inductance L 2, be a plurality of values of C assignment in the above-mentioned relation formula (3), calculate corresponding Z
3, obtain Z
3Set;
S63: from Z
3The resistance value of finding out the unique point of extracting with step S61 in the set has the Z of match most
3
The Z that S64: step S63 finds out
3Corresponding C is the match value of capacitor C 1.
Step S007: the match value to first resistance R 1, first inductance L 1, second resistance R 2, second inductance L 2 and capacitor C 1 carries out global optimization, obtains the simulation value of first resistance R 1, first inductance L 1, second resistance R 2, second inductance L 2 and capacitor C 1.
This step is carried out global search through the match value to first resistance R 1, first inductance L 1, second resistance R 2, second inductance L 2 and capacitor C 1, to carry out global optimization.
As shown in Figure 3, be the theory diagram of magnetic bead realistic model model building device preferred embodiment of the present invention, present embodiment comprises that model structure makes up module and search module,
Model structure makes up module, is used to make up magnetic bead realistic model structure;
Search module; Be used for according to the magnetic bead databook, obtain in the above-mentioned magnetic bead realistic model structure, can not confirm the match value of the element of its value according to the magnetic bead databook through one dimension or two-dimensional search; And the match value of element carried out global optimization, obtain the simulation value of counter element.
Above-mentioned explanation illustrates and has described the preferred embodiments of the present invention; But as previously mentioned; Be to be understood that the present invention is not limited to the form that this paper discloses, should do not regard eliminating as, and can be used for various other combinations, modification and environment other embodiment; And can in invention contemplated scope described herein, change through the technology or the knowledge of above-mentioned instruction or association area.And change that those skilled in the art carried out and variation do not break away from the spirit and scope of the present invention, then all should be in the protection domain of accompanying claims of the present invention.
Claims (10)
1. a magnetic bead simulation model modeling method is characterized in that, may further comprise the steps:
Make up magnetic bead realistic model structure;
Obtain in the said magnetic bead realistic model structure through search, can not confirm the match value of the element of its value according to the magnetic bead databook;
Said match value is carried out global optimization, obtain the simulation value of respective element.
2. method according to claim 1; It is characterized in that; Said magnetic bead realistic model structure comprises direct current resistance, first resistance, first inductance, second resistance, second inductance and electric capacity, and said first resistance is parallelly connected with first inductance, forms a RL branch road; Said second resistance is parallelly connected with second inductance, forms the 2nd RL branch road; A said RL branch road is connected with said the 2nd RL branch road, forms the 3rd RL branch road; Said the 3rd RL branch road is parallelly connected with said electric capacity, forms the RLC branch road; Said RLC branch road and said direct current resistance are connected in series.
3. method according to claim 2 is characterized in that, saidly obtains in the said magnetic bead realistic model structure through search, can not confirm that the match value step of the element of its value specifically may further comprise the steps according to the magnetic bead databook:
According to the magnetic bead databook, confirm the resistance value of said direct current resistance;
According to said magnetic bead family curve, confirm the estimated value of said first resistance and said first inductance;
According to the impedance frequency relational expression of a said direct current resistance and a said RL branch road, said first resistance and said first inductance are carried out the two-dimensional parameter search, obtain the match value of said first resistance and said first inductance;
According to the impedance frequency relational expression of said direct current resistance and said the 3rd RL branch road, said second resistance and said second inductance are carried out the two-dimensional parameter search, obtain the match value of said second resistance and said second inductance;
According to the impedance frequency relational expression of said direct current resistance and said RLC branch road, said electric capacity is carried out linear search, obtain the match value of said electric capacity.
4. method according to claim 3 is characterized in that,
The impedance frequency relational expression of a said direct current resistance and a RL branch road is:
Z
1＝abs(R
dc+R
1‖j2πfL
1)；
The impedance frequency relational expression of said direct current resistance and the 3rd RL branch road is:
Z
2＝abs(R
dc+R
1‖j2πfL
1+R
2‖j2πfL
2)；
The impedance frequency relational expression of said direct current resistance and RLC branch road is:
Z
3＝abs[R
dc+(R
1‖j2πfL
1+R
2‖j2πfL
2)‖(1/j2πfC)]；
Wherein, Z
1Be said direct current resistance and resistance value after a said RL branch road is connected, Z
2Be said direct current resistance and resistance value after said the 3rd RL branch road is connected, Z
3Be said direct current resistance and resistance value after said RLC branch road is connected, abs () representes plural modulo operation, and f is a frequency, R
DcBe the resistance value of said direct current resistance, R
1Be the resistance value of said first resistance, R
2Be the resistance value of said second resistance, L
1Be the inductance value of said first inductance, L
2Be the inductance value of said second inductance, C is the capacitance of said electric capacity.
5. according to claim 3 or 4 described methods, it is characterized in that said according to the magnetic bead family curve, the estimated value step of obtaining first resistance and first inductance is specially:
Make the corresponding resistance value of the characteristic peak point of said magnetic bead, be the maximum estimated value of said first resistance;
In the frequency band range of said the above RL branch road of magnetic bead family curve, extract characteristics of low-frequency point, read the resistance value of said unique point;
According to the resistance value of said unique point, calculate the estimated value of said first inductance.
6. method according to claim 5; It is characterized in that; Said impedance frequency relational expression according to a direct current resistance and a RL branch road is carried out the two-dimensional parameter search to first resistance and first inductance, and the match value step of obtaining said first resistance and said first inductance is specially:
In the frequency band range of said the above RL branch road of magnetic bead family curve, extract a plurality of unique points, read the resistance value of said unique point;
According to the resistance value of said direct current resistance and the impedance frequency relational expression of a said direct current resistance and a RL branch road, be L in the said relational expression with the estimated value of said first inductance
1Initial value, be the R in the said relational expression
1, L
1The many class values of assignment calculate corresponding Z
1, obtain Z
1Set;
From said Z
1Find out the Z that match is arranged with the resistance value of said unique point most in the set
1
The Z that finds out
1Corresponding R
1, L
1Be the match value of said first resistance and said first inductance.
7. method according to claim 6; It is characterized in that; Said impedance frequency relational expression according to direct current resistance and the 3rd RL branch road is carried out the two-dimensional parameter search to second resistance and second inductance, and the match value step of obtaining second resistance and second inductance is specially:
In the frequency band range of said the above the 2nd RL branch road of magnetic bead family curve, extract a plurality of unique points, read the resistance value of said unique point;
According to the resistance value of said direct current resistance, the match value of first resistance, the match value of first inductance and the impedance frequency relational expression of said direct current resistance and the 3rd RL branch road, be the R in the said relational expression
2, L
2The many class values of assignment calculate corresponding Z
2, obtain Z
2Set;
From said Z
2Find out the Z that match is arranged with the resistance value of said unique point most in the set
2
The Z that finds out
2Corresponding R
2, L
2Be the match value of said second resistance and said second inductance.
8. method according to claim 7 is characterized in that, said impedance frequency relational expression according to direct current resistance and RLC branch road is carried out linear search to electric capacity, and the match value step of obtaining electric capacity is specially:
High band on said magnetic bead family curve tuning-points right side extracts a plurality of unique points, reads the resistance value of said unique point;
According to the resistance value of said direct current resistance, the match value of first resistance, the match value of first inductance, the match value of second resistance, the match value of second inductance and the impedance frequency relational expression of said direct current resistance and RLC branch road; Be a plurality of values of C assignment in the said relational expression, calculate corresponding Z
3, obtain Z
3Set;
From said Z
3Find out the Z that match is arranged with the resistance value of said unique point most in the set
3
Said Z
3Corresponding C is the match value of said electric capacity.
9. a magnetic bead realistic model model building device is characterized in that, said device comprises that model structure makes up module and search module,
Said model structure makes up module, is used to make up magnetic bead realistic model structure;
Said search module is used for obtaining said magnetic bead realistic model structure through search, can not confirm the match value of the element of its value according to the magnetic bead databook, and said match value is carried out global optimization, obtains the simulation value of respective element.
10. device according to claim 9 is characterized in that, said search module is used for element is carried out one dimension or two-dimensional search.
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Application publication date: 20120229 |