CN109004842A - A kind of radio energy transmission system and method that mutual inductance and load can be recognized from primary side - Google Patents
A kind of radio energy transmission system and method that mutual inductance and load can be recognized from primary side Download PDFInfo
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- CN109004842A CN109004842A CN201810864036.2A CN201810864036A CN109004842A CN 109004842 A CN109004842 A CN 109004842A CN 201810864036 A CN201810864036 A CN 201810864036A CN 109004842 A CN109004842 A CN 109004842A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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Abstract
The invention discloses a kind of radio energy transmission systems and method that mutual inductance and load can be recognized from primary side, it is related to wireless power transmission field, complex redundancy equipment is equipped at primary and secondary side both ends to solve the radio energy transmission system under the prior art, it causes at high cost, circuit is complicated, the problem of poor reliability, the present invention includes DC power supply, high-frequency inverter circuit, primary side compensation circuit, dispatch coil, secondary side compensation circuit, high-frequency rectification circuit, filter circuit and load, coupled structure composition of the secondary side based on series compensation equivalent circuit, primary side compensating for coupling structure is unlimited, secondary side compensating for coupling structure includes the inductance L being sequentially connected in seriesS, capacitor CS, in secondary side compensation circuit, capacitor CSBoth ends are parallel with the capacitor C for having two-way switchS1Branch, the present invention are picked out the dynamic change for picking up end mutual inductance or load impedance by the voltage and current signal of real-time detection transmitting terminal, are not needed extra means, system complexity can be effectively reduced, reduce cost.
Description
Technical field
The present invention relates to wireless power transmission fields, more particularly to a kind of radio that mutual inductance and load can be recognized from primary side
It can Transmission system and method.
Background technique
When wireless power transmission technical application is to mobile power supply equipments such as rail transit train, electric cars, biography is overcome
The defects of wired electric energy transmission technology of system is easy carbon deposit, generation contact sparking, grafting is troublesome in poeration, effectively raises power supply
Quality, safety and reliability, have higher use value.When needing to output voltage in radio energy transmission system
Or output electric current mainly is controlled using two ways when being controlled, one is in primary side transmitting terminal and the pickup of pair side
One controller of each use is held, primary side uses opened loop control, and secondary side uses closed-loop control, and another kind is only to add in primary side transmitting terminal
Enter controller, but primary side transmitting terminal and secondary side pickup end need each a set of radio transmitting device of increase, the controller of primary side transmitting terminal
The feedback signal on secondary side is obtained by wireless communication.Radio transmitting device can be used radio-frequency module or increase a pair of of signal coil,
Signal coil is coupled to signal on energy coil, and energy coil had not only transmitted data but also transmitted energy.Both methods suffers from
Increase system cost, former pair side communicates the problems such as being highly prone to interfere under strong magnetic environment, increasing system complexity.
Summary of the invention
It is an object of the invention to: in order to solve the radio energy transmission system under the prior art at primary and secondary side both ends
Equipped with complex redundancy equipment, at high cost, the problem of circuit is complicated, poor reliability is caused, the invention proposes one kind can be from primary side
The radio energy transmission system for recognizing mutual inductance and load, does not need additional device, only passes through the voltage of real-time detection transmitting terminal
Current signal picks up the dynamic change of end mutual inductance or load impedance to pick out, and system complexity can be effectively reduced, and enhances robust
Property, reduce cost.
The technical solution adopted by the invention is as follows:
A kind of radio energy transmission system that mutual inductance and load can be recognized from primary side, the topological circuit includes direct current
Source, high-frequency inverter circuit, primary side compensation circuit, dispatch coil, secondary side compensation circuit, high-frequency rectification circuit, filter circuit and negative
Carry Rl；
The DC inverter that the high-frequency inverter circuit provides DC power supply is high-frequency alternating current；
The primary side compensation circuit is for stablizing high-frequency alternating current；
Alternating current after primary side compensation circuit is wirelessly transmitted to secondary side compensation circuit by the dispatch coil, receives and dispatches line
Circle includes primary coil LpWith secondary coil Ls；
The pair side compensation circuit is for stablizing the alternating current received；
The high-frequency rectification circuit will carry out rectification processing by the alternating current of secondary side compensation circuit, export direct current；
Supply load R after direct current is filtered the filter circuitl。
Further, the secondary side compensation circuit includes capacitor CS, the capacitor CSBoth ends are parallel with one with two-way opened
Close the capacitor C of SS1Branch.
Further, the full bridge rectifier that the high-frequency rectification circuit is made of diode D1~D4, the capacitor
CSOne end and secondary coil LsOne end connect, the other end connects with the midpoint of a upper and lower bridge arm of full bridge rectifier, described
Secondary coil LsThe other end connect with the midpoint of another upper and lower bridge arm of full bridge rectifier.
Further, the filter circuit includes filter inductance LrWith filter capacitor Cr, the filter inductance LrOne end with
The intersection point of full bridge rectifier two upper bridge arms connects, the filter inductance LrAnother termination filter capacitor CrOne end, it is described
Filter capacitor CrAnother two lower bridge arms of termination full bridge rectifier intersection point, the load RlIt is connected in parallel on filter capacitor CrTwo
End.
Further, the full bridge inverter that the high-frequency inverter circuit is made of metal-oxide-semiconductor S1~S4, the direct current
The intersection point of the upper bridge arm of anode connection full bridge inverter two in source, the cathode of DC power supply connect under full bridge inverter two
The intersection point of bridge arm.
Further, described one kind can there are two types of the shapes that works from the radio energy transmission system of primary side identification mutual inductance and load
State: resonant state and non-resonant condition；
When two-way switch S is disconnected, system is in resonant state；
When two-way switch S closure, system is in non-resonant condition.
A kind of control method for the wireless power transmission topology that mutual inductance and load can be recognized from primary side, comprising the following steps:
S1: closure two-way switch S is calculated mutual inductance value by circuit theory under system non-resonant condition；
S2: disconnecting two-way switch S, and using mutual inductance value obtained in S1, its value is not under the premise of relative tertiary location is constant
It changes, is substituted into system resonance state computation formula, load when system resonance state is calculated, thus can
Learn real time load.
Further, the concrete operations that mutual inductance value is calculated in the S1 are as follows:
When two-way switch S closure, system is in non-resonant condition, from circuit theory:
Primary coil impedance are as follows:
Xp=1i ω Lp+RLp (12)
Mutual inductance equivalent reactance are as follows: Xps=1i ω Mps (13)
Secondary impedance are as follows:
Current-voltage correlation between primary coil two sides and secondary side are as follows:
The equivalent impedance at primary coil both ends is set as ZP
f1(Mps,Req) impedance real part is represented, size is and mutual inductance and the related function of load；f2(Mps,Req) impedance void
Portion, size are also and mutual inductance and the related function of load.
By detecting primary coil both end voltageAnd electric currentObtain corresponding virtual value VpWith Ip, and between the two
Phase angle difference θ, so as to calculate
Joint type (7) and formula (8) can be obtained as follows about the linear equation in two unknowns group of mutual inductance and load
The relationship of secondary inductance and capacitor are as follows:
Joint type (9), formula (10) can solve ReqAnd Mps
Wherein:
Req--- the equivalent AC load on the left of rectifier；
RLp--- primary coil internal resistance resistance；
1i --- imaginary unit；
RLs--- secondary coil internal resistance；
When ω --- two-way switch disconnects, system overall resonance frequency；
Mps--- the mutual inductance value of dispatch coil.
Further, the concrete operations of computational load are as follows in the S2:
When two-way switch S is disconnected, system is in resonant state, from circuit theory:
The M that will have been acquired in S1psLoad value when can acquire resonant state is substituting in above formula.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. the present invention picks out mutual inductance and load by detecting the voltage current phase of primary coil using mutual inductance coupling model
Impedance magnitude obtains the functional relation of inverter bridge input voltage and system output voltage by identified parameters, to realize from original
Parameter identification and control are carried out while to secondary, are not had to additional extra means, are effectively reduced system complexity, avoiding need not
The cost wanted.
2. the present invention may be implemented primary side constant current and input secondary side by the rational design to primary side and secondary side compensation circuit
Constant voltage output, and resonance coil need not be added, unnecessary energy loss is avoided, guarantees that system maintains stable state, mentions
The efficiency of transmission and transmission stability of high system.
3. the present invention is applied particularly to electric motor car wireless charging, most cases under body is relative to the meeting of preset charged position
It offsets, closure two-way switch makes entire wireless charging system be in non-resonant condition, can examine from primary side charging pile at this time
It surveys at this position, the mutual inductance value on primary side (charging pile) and secondary side (electric vehicle) and impedance value when electric vehicle charges this moment,
The fixed mutual inductance value in relative position is also fixed, and then, disconnects two-way switch, then when this system resonance can be obtained, different moments are electronic
The charging impedance of vehicle, can take this tracking adjustment system, so that electric vehicle charge efficiency maximizes.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is each section connection block diagram of the present invention；
Fig. 2 is main circuit topology figure of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention, i.e., described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is logical
The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should be noted that the relational terms of term " first " and " 3 second " or the like be used merely to an entity or
Person's operation is distinguished with another entity or operation, is appointed without necessarily requiring or implying existing between these entities or operation
What this actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
A kind of radio energy transmission system that mutual inductance and load can be recognized from primary side, the topological circuit includes direct current
Source, high-frequency inverter circuit, primary side compensation circuit, dispatch coil, secondary side compensation circuit, high-frequency rectification circuit, filter circuit and negative
Carry Rl；
The DC inverter that the high-frequency inverter circuit provides DC power supply is high-frequency alternating current；
The primary side compensation circuit is for stablizing high-frequency alternating current；
Alternating current after primary side compensation circuit is wirelessly transmitted to secondary side compensation circuit by the dispatch coil, receives and dispatches line
Circle includes primary coil LpWith secondary coil Ls；
The pair side compensation circuit is for stablizing the alternating current received；
The high-frequency rectification circuit will carry out rectification processing by the alternating current of secondary side compensation circuit, export direct current；
Supply load R after direct current is filtered the filter circuitl。
As a preferred embodiment, pair side compensation circuit includes capacitor CS, the capacitor CSBoth ends are parallel with
One has the capacitor C of two-way switch SS1Branch.
As a preferred embodiment, the full-bridge rectification that the high-frequency rectification circuit is made of diode D1~D4
Circuit, the capacitor CSOne end and secondary coil LsOne end connect, a upper and lower bridge arm of the other end and full bridge rectifier
Midpoint connects, the secondary coil LsThe other end connect with the midpoint of another upper and lower bridge arm of full bridge rectifier.
As a preferred embodiment, the filter circuit includes filter inductance LrWith filter capacitor Cr, the filtering
Inductance LrOne end connect with the intersection point of full bridge rectifier two upper bridge arms, the filter inductance LrAnother termination filtered electrical
Hold CrOne end, the filter capacitor CrAnother two lower bridge arms of termination full bridge rectifier intersection point, the load RlIt is in parallel
In filter capacitor CrBoth ends.
As a preferred embodiment, the full-bridge inverting that the high-frequency inverter circuit is made of metal-oxide-semiconductor S1~S4
Circuit, the intersection point of the upper bridge arm of anode connection full bridge inverter two of the DC power supply, the cathode connection of DC power supply are complete
The intersection point of two lower bridge arms of bridge inverter circuit.
As a preferred embodiment, following design can be used in the primary side compensation circuit, which is mended
Repaying circuit includes inductance Lt, capacitor CtWith capacitor Cp, the inductance LtOne end be separately connected capacitor CtWith capacitor Cp, the inductance
LtThe other end connect with the midpoint of a upper and lower bridge arm of full bridge inverter, the capacitor CpWith primary coil LpSeries connection, institute
State the midpoint of another upper and lower bridge arm of full bridge inverter respectively with capacitor CtConnect with primary coil Lp.
Working principle: using topological structure of the present invention the work of IPT system when, direct current is by high-frequency inverter inversion
At high-frequency ac electric energy, high-frequency ac electric energy after primary side collocation structure in inspiring high-frequency alternating magnetic on transmitting coil
?.Receiving coil can induce the high-frequency ac electric energy of same frequency among the magnetic field that transmitting coil excites, and mend by secondary side
After repaying circuit, load can be supplied by becoming stable DC after rectification circuit.
There are mainly two types of working conditions for the IPT system that the present invention applies: resonant state and non-resonant condition；
When two-way switch S is disconnected, system is in resonant state；
When two-way switch S closure, system is in non-resonant condition.
So, resonance and non-resonant condition offer three all include the equation of load and mutual inductance, three equations three
A unknown quantity can must solve.
As a preferred embodiment, the mutual inductance value of the dispatch coil can be found out by the following method, for simplification
Principle explanation, using S-S structure verification formula:
When two-way switch S closure, system is in non-resonant condition, from circuit theory:
Primary coil impedance are as follows:
Xp=1i ω Lp+RLp (23)
Mutual inductance equivalent reactance are as follows: Xps=1i ω Mps (24)
Secondary impedance are as follows:
For convenience of formula deduction, enable herein
Cs1=Cs
It should be strongly noted that capacitor C in this patentS1Value is not fixed.
Current-voltage correlation between primary coil and secondary side are as follows:
The equivalent impedance Z at primary coil both endsPAre as follows:
Z can be obtainedpReal part Re_ZpFor
And ZpImaginary part Im_ZpFor
By detecting primary coil both end voltageAnd electric currentObtain corresponding virtual value VpWith Ip, and between the two
Phase angle difference θ, so as to calculate
Joint type (29), formula (30), formula (31) and formula (32), can be obtained the linear equation in two unknowns about mutual inductance and load
Group is as follows
The relationship of secondary inductance and capacitor are as follows:
Joint type (33) formula (34) can solve:
Wherein:
Req--- the equivalent AC load on the left of rectifier；
RLp--- primary coil internal resistance resistance；
1i --- imaginary unit；
RLs--- secondary coil internal resistance；
When ω --- two-way switch disconnects, system overall resonance frequency；
Mps--- the mutual inductance value of dispatch coil.
Further, the load RlIt can find out by the following method:
When two-way switch S is disconnected, system is in resonant state, from circuit theory:
The M that will have been acquiredpsLoad value when can acquire resonant state is substituting in above formula.
The formula solved by above-mentioned two step under the conditions of disresonance, need to only detect primary side it is found that in S-S coupled structure
The value on secondary side and primary side mutual inductance this moment can be obtained in conjunction with other well known elements numerical value in voltage and current and phase difference, because of opposite position
The characteristic that the mutual inductance value in constant former secondary side will not change is set, disresonance can be solved and condition of resonance loads different impedance values, nationality
This reaches the charging impedance that real-time tracking electric vehicle changes with the charging time.
The above is only the preferred embodiment of the present invention, it is noted that is come for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, can also make several modifications and improvements, these belong to the protection model of invention
It encloses.
Claims (9)
1. the radio energy transmission system that one kind can recognize mutual inductance and load from primary side, which is characterized in that the topological circuit packet
Include DC power supply, high-frequency inverter circuit, primary side compensation circuit, dispatch coil, secondary side compensation circuit, high-frequency rectification circuit, filtering
Circuit and load Rl；
The DC inverter that the high-frequency inverter circuit provides DC power supply is high-frequency alternating current；
The primary side compensation circuit is for stablizing high-frequency alternating current；
Alternating current after primary side compensation circuit is wirelessly transmitted to secondary side compensation circuit, dispatch coil packet by the dispatch coil
Include primary coil LpWith secondary coil Ls；
The pair side compensation circuit is for stablizing the alternating current received；
The high-frequency rectification circuit will carry out rectification processing by the alternating current of secondary side compensation circuit, export direct current；
Supply load R after direct current is filtered the filter circuitl。
2. one kind according to claim 1 can recognize the radio energy transmission system of mutual inductance and load, feature from primary side
It is, pair side compensation circuit includes capacitor CS, the capacitor CSBoth ends are parallel with the capacitor C for having two-way switch SS1
Branch.
3. one kind according to claim 2 can recognize the radio energy transmission system of mutual inductance and load, feature from primary side
It is, the full bridge rectifier that the high-frequency rectification circuit is made of diode D1~D4, the capacitor CSOne end and secondary side
Coil LsOne end connect, the other end connects with the midpoint of a upper and lower bridge arm of full bridge rectifier, the secondary coil Ls's
The other end connects with the midpoint of another upper and lower bridge arm of full bridge rectifier.
4. one kind according to claim 3 can recognize the radio energy transmission system of mutual inductance and load, feature from primary side
It is, the filter circuit includes filter inductance LrWith filter capacitor Cr, the filter inductance LrOne end and full bridge rectifier
The intersection point of two upper bridge arms connects, the filter inductance LrAnother termination filter capacitor CrOne end, the filter capacitor Cr's
The intersection point of another termination two lower bridge arms of full bridge rectifier, the load RlIt is connected in parallel on filter capacitor CrBoth ends.
5. one kind according to claim 1 can recognize the radio energy transmission system of mutual inductance and load, feature from primary side
It is, the full bridge inverter that the high-frequency inverter circuit is made of metal-oxide-semiconductor S1~S4, the anode connection of the DC power supply
The intersection point of full bridge inverter two upper bridge arms, the intersection point of cathode connection two lower bridge arms of full bridge inverter of DC power supply.
6. one kind according to claim 1 can recognize the radio energy transmission system of mutual inductance and load, feature from primary side
It is, described one kind can there are two types of working conditions: resonant state from the radio energy transmission system of primary side identification mutual inductance and load
And non-resonant condition；
When two-way switch S is disconnected, system is in resonant state；
When two-way switch S closure, system is in non-resonant condition.
7. the control method that one kind can recognize the wireless power transmission topology of mutual inductance and load from primary side, which is characterized in that including
Following steps:
S1: closure two-way switch S is calculated mutual inductance value and load value by circuit theory under system non-resonant condition；
S2: two-way switch S is disconnected, is not occurred using mutual inductance value its value under the premise of relative tertiary location is constant obtained in S1
Variation, is substituted into system resonance state computation formula, load when system resonance state is calculated, thus with regard to it can be seen that
Real time load.
8. according to a kind of control method for wireless power transmission topology that can recognize mutual inductance and load from primary side that claim 7 is stated,
It is characterized in that, the concrete operations for calculating mutual inductance value in the S1 are as follows:
When two-way switch S closure, system is in non-resonant condition, from circuit theory:
Primary coil impedance are as follows:
Xp=1i ω Lp+RLp (1)
Mutual inductance equivalent reactance are as follows: Xps=1i ω Mps (2)
Secondary impedance are as follows:
Current-voltage correlation between primary coil two sides and secondary side are as follows:
The equivalent impedance at primary coil both ends is set as ZP:
f1(Mps,Req) impedance real part is represented, size is and mutual inductance and the related function of load；f2(Mps,Req) imaginary impedance,
Size is also and mutual inductance and the related function of load；
By detecting primary coil both end voltageAnd electric currentObtain corresponding virtual value VpWith Ip, and phase angle between the two
Poor θ, so as to calculate:
Joint type (7) and formula (8) can be obtained as follows about the linear equation in two unknowns group of mutual inductance and load
The relationship of secondary inductance and capacitor are as follows:
Joint type (9), formula (10) can solve ReqAnd Mps
Wherein:
Req--- the equivalent AC load on the left of rectifier；
RLp--- primary coil internal resistance resistance；
1i --- imaginary unit；
RLs--- secondary coil internal resistance；
When ω --- two-way switch disconnects, system overall resonance frequency；
Mps--- the mutual inductance value of dispatch coil.
9. according to a kind of control method for wireless power transmission topology that can recognize mutual inductance and load from primary side that claim 8 is stated,
It is characterized in that, the concrete operations of computational load are as follows in the S2:
When two-way switch S is disconnected, system is in resonant state, from circuit theory:
The M that will have been acquired in S1psLoad value when can acquire resonant state is substituting in above formula.
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| CN109617255A (en) * | 2018-12-26 | 2019-04-12 | 北京酷能科技有限公司 | Wireless charging receives circuit |
| CN109768628B (en) * | 2019-01-17 | 2022-06-07 | 西南交通大学 | Target area magnetic shielding method and induction electric energy transmission system applying same |
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| CN110176810A (en) * | 2019-05-22 | 2019-08-27 | 国网江苏省电力有限公司电力科学研究院 | A kind of online mutual inductance identification device of radio energy transmission system and recognition methods |
| CN110176810B (en) * | 2019-05-22 | 2022-09-06 | 国网江苏省电力有限公司电力科学研究院 | Online mutual inductance identification device and method for wireless power transmission system |
| CN110556927A (en) * | 2019-06-19 | 2019-12-10 | 国家电网有限公司 | state observation method and system for induction type wireless power transmission system |
| CN110429718A (en) * | 2019-08-05 | 2019-11-08 | 西南交通大学 | A kind of radio energy transmission system constant current/constant voltage control method based on primary side parameter identification |
| CN110504760A (en) * | 2019-09-06 | 2019-11-26 | 西南交通大学 | A kind of dynamic radio electric energy Transmission system control method |
| CN110718971A (en) * | 2019-10-28 | 2020-01-21 | 哈尔滨工业大学 | Electric vehicle wireless charging transmission system based on improved secondary auxiliary coil and secondary resonance state estimation method |
| CN110718971B (en) * | 2019-10-28 | 2023-06-09 | 哈尔滨工业大学 | Electric vehicle wireless charging transmission system based on improved secondary auxiliary coil and secondary resonance state estimation method |
| CN112104099A (en) * | 2020-08-31 | 2020-12-18 | 西北工业大学 | IPT system maximum power transmission method based on bilateral LC-CCM compensation structure |
| CN111987779A (en) * | 2020-08-31 | 2020-11-24 | 重庆大学 | MC-WPT system load and mutual inductance identification model, method and system based on TensorFlow |
| CN112104099B (en) * | 2020-08-31 | 2024-01-16 | 西北工业大学 | IPT system maximum power transmission method based on bilateral LC-CCM compensation structure |
| CN112865340A (en) * | 2021-04-26 | 2021-05-28 | 中国人民解放军海军工程大学 | Mutual inductance parameter identification method and device of wireless charging system |
| WO2022227497A1 (en) * | 2021-04-26 | 2022-11-03 | 中国人民解放军海军工程大学 | Mutual inductance parameter identification method and device for wireless charging system |
| CN113629895A (en) * | 2021-09-15 | 2021-11-09 | 西南交通大学 | Wide-load-range efficient WPT system based on hybrid load matching and optimization method thereof |
| CN113629895B (en) * | 2021-09-15 | 2023-08-22 | 西南交通大学 | Wide-load-range efficient WPT system based on hybrid load matching and optimization method thereof |
| CN114475293A (en) * | 2021-12-22 | 2022-05-13 | 北京理工大学 | Position sensor-free electric automobile wireless charging automatic starting and guiding system |
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Application publication date: 20181214 |