CN109066913A - Wireless charging magnetic coupling device optimization method and system based on genetic algorithm - Google Patents
Wireless charging magnetic coupling device optimization method and system based on genetic algorithm Download PDFInfo
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- H02J7/025—
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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Abstract
本发明公开了一种基于遗传算法的无线充电磁耦合装置优化方法及系统，该方法包括：S1：根据用户选择的无线充电补偿电路拓扑结构确定磁芯影响磁耦合装置的输出功率和效率的相关参数；S2：获取对磁芯尺寸的约束条件；S3：以相关参数与磁芯尺寸之间的关系、磁芯的窗口面积与有效截面积的积与磁芯尺寸之间的关系、磁芯的体积与磁芯尺寸之间的关系为目标函数，通过遗传算法求解满足约束条件的磁芯尺寸；S4：判断满足约束条件的磁芯尺寸中是否存在满足预设指标要求的磁芯尺寸，若是，执行S5，若否，执行S6；S5：输出满足预设指标要求的磁芯尺寸；S6：获取新的约束条件，重复执行S3。本发明有利于提高磁耦合装置的电能传输效果。
The invention discloses a method and system for optimizing a wireless charging magnetic coupling device based on a genetic algorithm. The method includes: S1: According to the topological structure of the wireless charging compensation circuit selected by the user, it is determined that the magnetic core affects the output power and efficiency of the magnetic coupling device. parameters; S2: Obtain the constraints on the size of the magnetic core; S3: The relationship between the relevant parameters and the size of the magnetic core, the relationship between the product of the window area and the effective cross-sectional area of the magnetic core and the size of the magnetic core, the The relationship between the volume and the magnetic core size is the objective function, and the genetic algorithm is used to solve the magnetic core size that meets the constraint conditions; S4: judge whether there is a magnetic core size that meets the preset index requirements among the magnetic core sizes that meet the constraint conditions, and if so, Execute S5, if not, execute S6; S5: Output the size of the magnetic core that meets the preset index requirements; S6: Obtain new constraints, and repeat S3. The invention is beneficial to improve the electric energy transmission effect of the magnetic coupling device.
Description
Technical field
The present invention relates to wireless charging technical field, especially a kind of wireless charging magnetic coupling device based on genetic algorithm
Optimization method and system.
Background technique
Autonomous Underwater Vehicle AUV (Autonomous underwater vehicle) is the weight for exploring sea floor world
Tool is wanted, is all widely used in civilian and military domain, but due to being limited by own vol and battery technology,
AUV can not work under water for a long time, and main using the method to charge after recycling is salvaged, this mode is not only intelligent
It is lower, and time-consuming, not convenient enough, greatly reduces the working efficiency and concealment of AUV.Contact inductive electric energy transmits skill
Art, that is, wireless charging technology, can allow AUV is autonomous, fast and efficiently completes charging, be the reason of underwater AUV electric energy transmission at present
Want to select.
The research about wireless charging technology is concentrated mainly on circuit topological structure, impedance matching and control strategy at present
Equal directions, it is less for the research of the optimization design of magnetic coupling device itself.But magnetic coupling device is as wireless charging system
In vital part, have close contact with transimission power and the efficiency of wireless charging, it may be said that magnetic coupling device is set
Whether meter rationally determines the superiority and inferiority of wireless charging system performance to a certain extent.
To realize higher transmittability, the magnetic coupling device applied to high-power wireless charging would generally add magnetic core
Confining magnetic field, but in existing magnetic coupling device design process, it will usually according to the direct selection standard size of power grade
Magnetic core cause electric energy laser propagation effect poor without considering specific application environment.
Summary of the invention
In view of this, one of the objects of the present invention is to provide a kind of wireless charging magnetic coupling device based on genetic algorithm
Optimization method and system are conducive to the electric energy laser propagation effect for improving magnetic coupling device.
In order to achieve the above objectives, technical solution of the present invention provides a kind of wireless charging magnetic coupling based on genetic algorithm
Installation optimization method, comprising:
Step S1: determine that magnetic core influences magnetic coupling device according to the wireless charging compensation circuit topological structure that user selects
The relevant parameter of output power and efficiency；
Step S2: the constraint condition to magnetic core size is obtained；
Step S3: with the window area and effective sectional area of relationship, magnetic core between the relevant parameter and magnetic core size
Product and magnetic core size between relationship, the relationship between the volume of magnetic core and magnetic core size be objective function, pass through heredity and calculate
Method solves the magnetic core size for meeting constraint condition；
Step S4: judgement meets in the magnetic core size of constraint condition with the presence or absence of the magnetic core ruler for meeting pre-set level requirement
It is very little, if so, step S5 is executed, if it is not, executing step S6；
Step S5: the output magnetic core size for meeting pre-set level requirement；
Step S6: obtaining new constraint condition, and repeats step S3.
Further, the wireless charging compensation circuit topological structure is the SP of primary side series resonance, secondary side parallel resonance
Compensation network, the relevant parameter are the coefficient of coup of magnetic core.
Further, the magnetic core is E-type magnetic core, and the magnetic core size includes the window of the window height of magnetic core, magnetic core
Width, magnetic core side column width.
Further, the pre-set level requires to include coefficient of coup index request, umber of turn index request, winding and cuts
At least one in area index requirement, the efficiency index requirement of the output power index request of magnetic coupling device, magnetic coupling device
Kind.
Further, the magnetic coupling device is applied to Autonomous Underwater Vehicle.
To achieve the above object, technical solution of the present invention additionally provides a kind of wireless charging electromagnetism coupling based on genetic algorithm
It attaches together and sets optimization system, comprising:
First processing module, the wireless charging compensation circuit topological structure for being selected according to user determine that magnetic core influences magnetic
The output power of coupling device and the relevant parameter of efficiency；
Module is obtained, for obtaining the constraint condition to magnetic core size；
Second processing module, for the window area of relationship, magnetic core between the relevant parameter and magnetic core size with
Relationship, the volume of magnetic core between the product and magnetic core size of effective sectional area and the relationship between magnetic core size are objective function,
The magnetic core size for meeting constraint condition is solved by genetic algorithm；
Judgment module, with the presence or absence of the magnetic for meeting pre-set level requirement in the magnetic core size for judging to meet constraint condition
Core size；
Output module, for exporting the magnetic core size for meeting pre-set level requirement；
Control module for obtaining new constraint condition, and controls the Second processing module and repeats and pass through heredity
The step of algorithm solution meets the magnetic core size of constraint condition.
Further, the wireless charging compensation circuit topological structure is the SP of primary side series resonance, secondary side parallel resonance
Compensation network, the relevant parameter are the coefficient of coup of magnetic core.
Further, the magnetic core is E-type magnetic core, and the magnetic core size includes the window of the window height of magnetic core, magnetic core
Width, magnetic core side column width.
Further, the pre-set level requires to include coefficient of coup index request, umber of turn index request, winding and cuts
At least one in area index requirement, the efficiency index requirement of the output power index request of magnetic coupling device, magnetic coupling device
Kind.
Further, the magnetic coupling device is applied to Autonomous Underwater Vehicle.
Wireless charging magnetic coupling device optimization method provided by the invention is based on genetic algorithm, not only can solve traditional magnetic
The disadvantage that coupling device coupling ability is weak, transimission power is small effectively improves the electric energy laser propagation effect of magnetic coupling device, while also
Conducive to the volume and weight for reducing magnetic coupling device, the AUV surface area of occupancy is less, and unit area power density is higher.
Detailed description of the invention
By referring to the drawings to the description of the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage will be apparent from, in the accompanying drawings:
Fig. 1 is a kind of wireless charging magnetic coupling device optimization method based on genetic algorithm provided in an embodiment of the present invention
Flow chart；
Fig. 2 is a kind of schematic diagram of wireless charging circuit provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of magnetic core provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of magnetic circuit model provided in an embodiment of the present invention；
Fig. 5 is the flow chart of genetic algorithm provided in an embodiment of the present invention.
Specific embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.Under
Text is detailed to describe some specific detail sections in datail description of the invention, in order to avoid obscuring essence of the invention,
There is no narrations in detail for well known method, process, process, element.
In addition, it should be understood by one skilled in the art that provided herein attached drawing be provided to explanation purpose, and
What attached drawing was not necessarily drawn to scale.
Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar
Word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, be " including but not limited to " contains
Justice.
In the description of the present invention, it is to be understood that, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
It is two or more.
It is that a kind of wireless charging magnetic coupling device based on genetic algorithm provided in an embodiment of the present invention is excellent referring to Fig. 1, Fig. 1
The flow chart of change method, this method comprises:
Step S1: determine that magnetic core influences magnetic coupling device according to the wireless charging compensation circuit topological structure that user selects
The relevant parameter of output power and efficiency；
Step S2: the constraint condition to magnetic core size is obtained；
Step S3: with the window area and effective sectional area of relationship, magnetic core between the relevant parameter and magnetic core size
Product and magnetic core size between relationship, the relationship between the volume of magnetic core and magnetic core size be objective function, pass through heredity and calculate
Method solves the magnetic core size for meeting constraint condition；
Step S4: judgement meets in the magnetic core size of constraint condition with the presence or absence of the magnetic core ruler for meeting pre-set level requirement
It is very little, if so, step S5 is executed, if it is not, executing step S6；
Step S5: the output magnetic core size for meeting pre-set level requirement；
Step S6: obtaining new constraint condition, and repeats step S3.
Genetic algorithm is a kind of search heuritic approach in computer science artificial intelligence field for solving to optimize,
The contents such as hereditary variation in evolution biology, natural selection and hybridization have been used for reference, it is next excellent for generating useful solution
Change and search for problem.Therefore, multiple-objection optimization may be implemented in magnetic coupling device design process using genetic algorithm；
Wherein, in embodiments of the present invention, the wireless charging compensation circuit topological structure can for primary side series resonance,
The SP compensation network of secondary side parallel resonance, the relevant parameter are the coefficient of coup of magnetic core.
Wherein, in embodiments of the present invention, the magnetic core can be E-type magnetic core, and the magnetic core size includes the window of magnetic core
Open height, the window width of magnetic core, magnetic core side column width.
Wherein, in embodiments of the present invention, the pre-set level requirement may include coefficient of coup index request, winding turns
Count index requests, winding cross section accumulates index request, the efficiency of the output power index request of magnetic coupling device, magnetic coupling device refers to
At least one of mark requirement.
Wherein, in embodiments of the present invention, the magnetic coupling device can be applied to Autonomous Underwater Vehicle.
Wireless charging magnetic coupling device optimization method provided in an embodiment of the present invention is based on genetic algorithm, not only can solve
The disadvantage that traditional magnetic coupling device coupling ability is weak, transimission power is small effectively improves the electric energy laser propagation effect of magnetic coupling device, together
When also help reduce magnetic coupling device volume and weight, the AUV surface area of occupancy is less, unit area power density compared with
It is high.
For example, the wireless charging magnetic coupling device optimization method based on genetic algorithm in the embodiment of the present invention can wrap
It includes:
Step A: the wireless charging compensation circuit topological structure that user selects wireless charging circuit to use according to design object,
It is (including wireless that corresponding wireless charging circuit is established by the wireless charging compensation circuit topological structure selected according to user later
Charge compensation circuit and magnetic coupling device) circuit model, then by the corresponding derivation of equation obtain magnetic core transmitting electric energy power and
The key parameter of efficiency (i.e. magnetic core influences the output power of magnetic coupling device and the relevant parameter of efficiency), the specific steps are as follows:
Step A1: user predefines design object, as the transimission power and efficiency of transmission of magnetic coupling device, progress are wireless
Loadtype and size of charging etc.；
For example, design object is as follows: the transimission power of magnetic coupling device is not less than 600W, and efficiency of transmission is not less than 80%,
It charges for the battery to autonomous underwater vehicle, and the resistance value of cell load constantly changes in charging process；
Step A2: user can select wireless charging compensation circuit topological structure according to above-mentioned design object, later can be with
The circuit model of corresponding wireless charging circuit is established according to the wireless charging compensation circuit topological structure that user selects；
Magnetic coupling device primary side, secondary side can be made to be in resonance by adding compensating electric capacity (i.e. wireless charging compensation circuit)
State is conducive to energy transmission, connected (S) according to the compensating electric capacity of primary and secondary side or in parallel (P) in circuit, common nothing
Line charge electronic compensating circuit topological structure is divided into tetra- kinds of SS, SP, PS and PP, for example, humorous if choosing primary side series resonance, secondary side parallel connection
The SP compensation network of vibration, the SP wireless charging circuit obtained are as shown in Figure 2；
Step A3: the output power P of magnetic coupling device is acquired according to the circuit model of obtained wireless charging circuitoutWith
Efficiency eta；
Pout=VinI1k2Q2；
Wherein, VinI1It is input power, k is the coefficient of coup of magnetic core, Q2It is secondary circuit quality factor, R1And RrRespectively
It is primary coil resistance, secondary side reaction resistance, LpAnd LsRespectively primary side, secondary side inductance, RacIt is AC equivalent resistance, passes through
Above-mentioned formula, available, when coefficient of coup k increases, output power and efficiency can all increase, therefore can be by coefficient of coup k
It pursues a goal as the most main, in order to design the magnetic coupling device of high coupling ability, the relational expression of coefficient of coup k can be made
For objective function f1；
Step B: user can determine according to design objective, the magnetic circuit model of magnetic core and autonomous underwater vehicle own vol
The constraint condition of magnetic core size；
Step B1: for example, E-type magnetic cored structure as shown in Figure 3 can be used by being applied to the magnetic core of autonomous underwater vehicle,
Wherein, L is core length, and H is the window height of magnetic core, and W is core thickness, and a is magnetic core side column width, and l is the window of magnetic core
Width, the magnetic circuit model of the magnetic core as shown in figure 4, the window height H of the coefficient of coup k and magnetic core that are obtained by the magnetic circuit model,
The relationship of the window width l of magnetic core, magnetic core side column width a, specific as follows:
Wherein, RE1It is magnetic core air gap magnetic resistance, RE2It is leakage field resistance, SL=KLH*2a=0.8Ha, wherein SLIt is leakage field resistance magnetic
Road sectional area, SaIt is air-gap magnetic circuit sectional area, KLIt is empirical coefficient (value 0.4), the expression formula of coefficient of coup k is to evaluate
Function；
Step B2: according to the AP method in Magnetic Core Design obtain the product AP of the area of magnetic core window area and effective sectional area with
The relationship of the window height of magnetic core, the window width of magnetic core, magnetic core side column width, it is specific as follows；
Wherein, AP is the window area of magnetic core and the product of its effective sectional area, AwIt is that magnetic core can be with coiling winding wire
The window area of circle, AeIt is the effective sectional area of magnetic core, η is the efficiency of magnetic coupling device output, PoIt is the function of system load output
Rate, KwIt is the usage factor of the window area of magnetic core, indicates the window side of winding technique area shared on magnetic core and magnetic core
Long-pending ratio, kfIt is form factor, J is the current density of primary side input current in winding, BACIt is the AC magnetism of selected magnetic core
Flux density, f are the working frequencies of system；
AP embodies the ability of magnetic core transmitting power, and value is bigger, and the power that magnetic core transmits electric energy is higher；
For example, output power, which is greater than, is equal to 600W when efficiency is more than or equal to 0.8, obtained by high frequency transformer design, AP=
50700mm4, take 3 times -4 times of allowance, it is desirable that the product AP of area is greater than 152100mm4。
The relationship of step B3: the core volume V and window height H of magnetic core, the window width l of magnetic core, magnetic core side column width a
It is as follows:
V=[(4a+2l) × (H+a) -2lH] × (2a)；
Wherein, core volume is smaller, and the weight bearing of submarine navigation device is more conducive to extend its cruise duration with regard to smaller；
By above-mentioned relation, user can choose the window height H of magnetic core, the window width l of magnetic core, magnetic core side column width
The constraint condition (using H, l, a as optimized variable) of a, such as:
lmin< l < lmax；
Hmin< H < Hmax；
amin< a < amax；
For example, the constraint condition of above three variable can be with are as follows: the minimum 5mm of H minimum 15mm, l minimum 10mm, a；
Step C: with the relationship between above-mentioned k and H, l, a, the relationship between above-mentioned AP and H, l, a, above-mentioned V and H, l, a it
Between relationship be objective function f1, f2, f3, solved by genetic algorithm and meet the solution of constraint condition, flow chart as shown in figure 5,
It is specific as follows:
Step C1: defining the number of iterations, generates initial population；
Due to desired the result is that above three formula difference maximizing, maximum value and minimum value, so for side
Just it is analyzed using genetic algorithm, the relational expression of k and AP is taken into negative sign, the relational expression of V is constant, for example, defining the number of iterations
For 200 generations, initial population is generated；
Step C2: being divided into several sub-groups for initial population, by distributing specific item scalar functions to each sub-group, builds
Vertical fitness function simultaneously calculates fitness value, and Selecting operation arranged side by side is carried out in each sub-group, it is higher to select fitness
Individual in sub-group forms new sub-group；
Specifically, all individuals in initial random father population are equably divided into three by the number of specific item scalar functions
Sub-group distributes a sub- objective function to each sub-group, and establishes fitness function according to objective function, calculates every height
The fitness value of each of group individual carries out descending sort according to fitness value, and selects fitness in the sub-group
Higher individual forms new sub-group；
Step C3: merging into a complete new group for new sub-group, by recombination and mutation operator, generates next
For complete new population；
Step C4: continuous iteration is repeated successively to carry out step C2 and step C3, until meeting maximum number of iterations, be found out
Optimized variable optimal solution；
Step D: since a series of obtained solutions of step C not necessarily all meet pre-set level requirement, it is therefore desirable to carry out
Verifying, what judgment step C was obtained meets in the magnetic core size of constraint condition with the presence or absence of the magnetic core ruler for meeting pre-set level requirement
It is very little, if so, output meets the magnetic core size of pre-set level requirement, if it is not, obtaining new constraint condition, and repeat step C；
Specifically, it can be determined that whether the solution that above-mentioned steps C is obtained meets coefficient of coup index request, umber of turn index
It is required that, winding cross section product index request, the output power index request of magnetic coupling device, magnetic coupling device efficiency index requirement
One of or a variety of requirements, most suitable effective solution is screened out from it, for example, specific steps can be such that
Step D1: each the corresponding coupled systemes of solution (each magnetic core size for meeting constraint condition) judged
Whether number k meets coefficient of coup index request, if not satisfied, then excluding this solution；
For example, coefficient of coup index request be not less than 0.5, if the corresponding coefficient of coup k of a certain solution (by k and H, l, a it
Between relational expression obtain) be 0.55, then meet this requirement；
The solution for being unsatisfactory for coefficient of coup index request can be excluded by this step, met the coefficient of coup if it does not exist and referred to
Desired solution is marked, then obtains new constraint condition, and repeat step C；
Step D2: whether the solution that judgment step D1 is filtered out meets default umber of turn index request, winding cross section product refers to
Mark requires；
For example, excluding the solution, step if winding cross section product index request is greater than the corresponding magnetic core window area of a certain solution
The corresponding magnetic core window area of the solution that D1 is filtered out is respectively less than winding cross section product index request, then obtains new constraint condition, and
Repeat step C；
Such as, however, it is determined that the umber of turn of selection is 20 circles, and using the litz wire of 0.1mm*400, then its theoretical calculation accounts for
With area 180mm2, practical coiling area occupied is about 300mm2If a certain solve corresponding window area as 600mm2, then can
Around lower 20 circle coil, meet winding cross section product index request；
Step D3: inductance and the mutual inductance, the compensation of primary and secondary side electricity of the magnetic coupling device primary and secondary side used are determined
Hold, whether the solution that judgment step D2 is filtered out meets the efficiency of the output power index request of magnetic coupling device, magnetic coupling device
Index request need to select constraint condition, and repeat step C if being not satisfied again；
For example, determining that the primary and secondary side inductance used is 107uH, mutual inductance 51uH, primary compensation capacitor 125uF, pair
Side compensating electric capacity 94uF, output power index request are not less than 600W, and efficiency index requires to be not less than 80%, if a certain solution
Corresponding output power 602W, efficiency 86%, then the solution meets this requirement；
The magnetic core size of the available meet demand of user through the above way.
The present invention can solve that AUV wireless charging magnetic coupling device coupling ability is weak, leakage magnetic field energy loses excessive lack
Point can obtain preferably solving each target, the magnetic coupling dress obtained through the invention by comprehensively considering each target
It is strong to set not only primary side, secondary side coupling ability, additionally it is possible to reduce volume and weight, be conducive to reduce the AUV surface area occupied, unit
Area power density is higher.
The wireless charging magnetic coupling device optimization system based on genetic algorithm that the embodiment of the invention also provides a kind of, packet
It includes:
First processing module, the wireless charging compensation circuit topological structure for being selected according to user determine that magnetic core influences magnetic
The output power of coupling device and the relevant parameter of efficiency；
Module is obtained, for obtaining the constraint condition to magnetic core size；
Second processing module, for the window area of relationship, magnetic core between the relevant parameter and magnetic core size with
Relationship, the volume of magnetic core between the product and magnetic core size of effective sectional area and the relationship between magnetic core size are objective function,
The magnetic core size for meeting constraint condition is solved by genetic algorithm；
Judgment module, with the presence or absence of the magnetic for meeting pre-set level requirement in the magnetic core size for judging to meet constraint condition
Core size；
Output module, for exporting the magnetic core size for meeting pre-set level requirement；
Control module for obtaining new constraint condition, and controls the Second processing module and repeats and pass through heredity
The step of algorithm solution meets the magnetic core size of constraint condition.
In one embodiment, the wireless charging compensation circuit topological structure is primary side series resonance, secondary side parallel resonance
SP compensation network, the relevant parameter be magnetic core the coefficient of coup.
In one embodiment, the magnetic core is E-type magnetic core, and the magnetic core size includes the window height of magnetic core, magnetic core
Window width, magnetic core side column width.
In one embodiment, the pre-set level require to include coefficient of coup index request, umber of turn index request, around
It organizes in the efficiency index requirement of sectional area index request, the output power index request of magnetic coupling device, magnetic coupling device extremely
Few one kind.
In one embodiment, the magnetic coupling device is applied to Autonomous Underwater Vehicle.
Those skilled in the art will readily recognize that above-mentioned each preferred embodiment can be free under the premise of not conflicting
Ground combination, superposition.
It should be appreciated that above-mentioned embodiment is merely exemplary, and not restrictive, without departing from of the invention basic
In the case where principle, those skilled in the art can be directed to the various apparent or equivalent modification or replace that above-mentioned details is made
It changes, is all included in scope of the presently claimed invention.
Claims (10)
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