CN106208419A - A kind of constant current output type composite resonant network bi-directional radio energy transmission system and method for designing thereof - Google Patents
A kind of constant current output type composite resonant network bi-directional radio energy transmission system and method for designing thereof Download PDFInfo
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Abstract
The invention discloses a kind of constant current output type composite resonant network bi-directional radio energy transmission system and method for designing thereof, system is sequentially connected with is formed by former limit DC source, former limit choke induction, former limit HF switch network, former limit Shunt compensation capacitor, former limit series compensation capacitance, loosely coupled transformer, secondary series compensation capacitance, secondary Shunt compensation capacitor, secondary HF switch network, secondary choke induction and secondary DC source.It is characterized in that: propose a kind of novel circuit topological, system is made to be mirror image by former limit compensation mechanism, loosely coupled transformer and secondary compensation mechanism are carried out parameter designing, while realizing radio energy transmission system constant current output, it is also possible to make energy two-way transmission.It has the beneficial effect that the present invention need not the closed loop control of complexity when design system, just can meet system design objective based on AC impedence method by parameter designing, simplify the structure of system, improve again the stability of system.
Description
Technical field
The present invention relates to a kind of constant current output type bidirectional radio energy transmission system, belong to wireless power transmission field, tool
Body relates to a kind of constant current output type composite resonant network bi-directional radio energy transmission system and method for designing thereof.
Background technology
Wireless power transmission technology is as one of most active study hotspot in current electrical engineering field, in recent years by wide
General concern.Wherein, wireless power transmission technology based on electromagnetic induction coupling principle is that research is the most ripe at present, most widely used general
One, be all well used at transportation, underwater power, mobile phone and medical-therapeutic treatment of human body etc..But research is wireless at present
The many requirements of electric energy transmission system realize the function that output voltage is constant, the radio energy transmission system constant to system output current
Study the most fewer.And constant-current source has obtained increasingly extensive application at aspects such as business, industry, medical treatment, such as accumulator is filled
Electricity, the driving of light emitting diode, capacitor charging and arc welding etc..Additionally, in traditional radio energy transmission system, due to
Electric energy unidirectional transmission property, there is electric energy feedback difficulty in system, low and electric energy transmission the motility of system open loop operational efficiency is dropped
The problem such as low.The present invention proposes a kind of constant current output type bidirectional radio energy transmission system, can solve the problems referred to above well.
When constant current output type bidirectional radio energy transmission system is designed, hold for reducing circulation loss and volt-ampere
Amount, puies forward the efficiency of high energy transmission, and the Frequency point selecting to make radio energy transmission system work in input impedance being purely resistive is attached
It it is closely common control thought；For improving the load capacity of system, when load switching or fluctuation, it is desirable to system is in certain work
Under the conditions of realize output electric current and load unrelated characteristic；As for multi load constant current output type radio energy transmission system, then want
Asking when some load change, the operation on other load and former limit is unaffected, it is necessary to system primary current and resonance work
Working frequency approximation is constant.In sum, constant current output type radio energy transmission system is designed with following target.
1) primary coil electric current and the load output electric current approximately constant when load change.
2) keep keeping system stability to be operated near resonant frequency point during load change.
In order to realize above-mentioned target, current research focus mainly on different control targets introduce respectively closed loop bear
Feedback control, lacks the research being met load constant properties of flow by System Parameter Design.As in order to ensure system primary coil
Current constant, document " inductive electric energy transmission system energy injection control method research " proposes energy injection control method, passes through
The energy controlling injection resonant network realizes the amplitude control of former limit resonance current.In order to ensure that system stability is operated in resonance
Under frequency, document " the frequency stable Journal of Sex Research of non-contact electric energy transmission system " proposes resonant parameter based on phased inductance and exists
Line tuning strategy, is adjusted the phased inductance angle of flow in real time, changes the equivalent inductance value being connected in parallel on resonant network by Cycle by Cycle,
Thus maintain system Sofe Switch operating frequency constant.For proof load constant output current, " noncontact is the most electric for document
Can transmission and control technology and application thereof " propose and at former limit rectification side DC/DC changer of connecting, inverter input voltage is entered
Row regulation controls to load constant output current.For current stabilization output type radio energy transmission system, if above method is individually real
The primary coil electric current constant current of existing system, output electric current constant current and system resonance operating frequency constant frequency one of which all can reach
Preferably effect.But it is intended to meet above-mentioned 3 requirements simultaneously, introduces closed loop control respectively, system design difficulty can be caused to increase,
Textural anomaly is complicated, and stability and safety reduce.
Summary of the invention
The problem existed for current current stabilization output type bidirectional radio energy transmission system design, for ensureing former limit resonance electricity
Flow constant, system output current is constant, system resonance operating frequency is stable and the transmitted in both directions of electric energy, and the present invention proposes one
Constant current output type composite resonant network bi-directional radio energy transmission system, is come by the design of systematic parameter based on AC impedence method
Meet above-mentioned each requirement, both reduced design difficulty, simplify the structure of system, improve again the stability of system.
The object of the present invention is achieved like this:
A kind of constant current output type composite resonant network bi-directional radio energy transmission system includes former limit DC source, former limit chokes electricity
Sense, the series connection of former limit HF switch network, former limit Shunt compensation capacitor, former limit series compensation capacitance, loosely coupled transformer, secondary are mended
Repay electric capacity, secondary Shunt compensation capacitor, secondary HF switch network, secondary choke induction and secondary DC source.
Wherein, former limit DC source series connection former limit choke induction is followed by the input of former limit HF switch network.
Described former limit Shunt compensation capacitor is connected in parallel on the outfan of former limit high-frequency inversion network, former limit series compensation capacitance
Shunt compensation capacitor two ends, former limit it are connected in parallel on the primary side winding of loosely coupled transformer after connecting；The secondary of loosely coupled transformer around
Group is connected in parallel on secondary Shunt compensation capacitor two ends after connecting with secondary series compensation capacitance, and secondary Shunt compensation capacitor is also connected in
The input of secondary HF switch network.
Described secondary choke induction is connected in parallel on the outfan of secondary HF switch network with secondary DC source after connecting.
When system is operated in forward transmission mode, former limit HF switch network work is at inverter mode, secondary HF switch
Network work can be equivalent to variable load at rectification mode, secondary choke induction and secondary DC source.Former limit unidirectional current subject string
Join former limit choke induction and be equivalent to DC current source, be high frequency square wave ac current source through the HF switch network inversion of former limit, then
Sequentially pass through former limit Shunt compensation capacitor, former limit series compensation capacitance, loosely coupled transformer, secondary series compensation capacitance, secondary
Shunt compensation capacitor produces the high frequency sinusoidal ac current source of a same frequency, gives after secondary HF switch network rectification
Effect power supply of variable load.
When system is operated in reverse transfer pattern, secondary HF switch network work at inverter mode, former limit HF switch
Network work is at rectification mode, and former limit choke induction and former limit DC source can be equivalent to variable load.Secondary unidirectional current subject string
Connection secondary choke induction is equivalent to DC current source, is high frequency square wave ac current source through secondary HF switch network inversion, then
Sequentially pass through secondary Shunt compensation capacitor, secondary series compensation capacitance, loosely coupled transformer, former limit series compensation capacitance, former limit
Shunt compensation capacitor produces the high frequency sinusoidal ac current source of a same frequency, gives after the HF switch network rectification of former limit
Effect power supply of variable load.
Beneficial effect:
Introduce multiple closed loop control during compared to load change and realize that primary current is constant, system output current is constant and system is humorous
Operating frequency of shaking is stable, and this programme design difficulty is less, simple in construction, improves system stability and safety；At resonance frequency
When working under rate, input impedance is purely resistive, can improve system effectiveness；In system energy transmitting terminal, receiving terminal all use right
Deng topology, this equity topology is operable with magnetic excitation pattern and magnetic field receives pattern, has mirror-image structure, can realize energy
Transmitted in both directions.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the present invention.
In figure: 1, former limit DC source, 2, former limit choke induction, 3, former limit HF switch network, 4, former limit shunt compensation
Electric capacity, 5, former limit series compensation capacitance, 6, loosely coupled transformer, 7, secondary series compensation capacitance, 8, secondary Shunt compensation capacitor,
9, secondary HF switch network, 10, secondary choke induction, 11, secondary DC source.
Fig. 2 is circuit system knot under the energy forward transmission mode using former secondary magnetic energy for emission mechanism mutual inductance coupling model to build
Composition.
Fig. 3 is leakage inductance model and the mutual inductance coupling model figure of loosely coupled transformer.
Fig. 4 is the leakage inductance precircuit structural representation of the present invention.
Fig. 5 is the preliminary simplification figure after Fig. 2 system resonance.
Fig. 6 is the final simplification figure after Fig. 2 system resonance.
Fig. 7 is the energy forward transmission mode that under Matlab emulation, employing former secondary magnetic energy for emission mechanism mutual inductance coupling model is built
Lower circuit system structure chart.
The load resistance load output electric current when 0.3s is changed to 50 Ω by 10 Ω when Fig. 8 is energy forward transmission modei o
Waveform.
The load resistance primary coil electric current when 0.3s is changed to 50 Ω by 10 Ω when Fig. 9 is energy forward transmission modei p
Waveform.
When Figure 10 is energy forward transmission mode, load resistance system input when 0.3s is changed to 50 Ω by 10 Ω is gained merit
PowerP inWith reactive powerQ inWaveform.
Detailed description of the invention
For preferably explaining advantages of the present invention, purpose and design, below in conjunction with accompanying drawing, the present invention is embodied as
Example is described in further detail.
Embodiment 1: as it is shown in figure 1, a kind of constant current output type composite resonant network bi-directional radio energy transmission system is concrete
By 1, former limit DC source, 2, former limit choke induction, 3, former limit HF switch network, 4, former limit Shunt compensation capacitor, 5, former limit
Series compensation capacitance, 6, loosely coupled transformer, 7, secondary series compensation capacitance, 8, secondary Shunt compensation capacitor, 9, secondary high frequency
Switching network, 10, secondary choke induction, 11, secondary DC source constitutes.As a example by energy forward transmission mode, such as Fig. 2 institute
Show.Former and deputy limit HF switch network is formed by 4 full-controlled switch devices and anti-paralleled diode thereof, former limit HF switch
Network work is at inverter mode, and secondary HF switch network work is at rectification mode, secondary choke induction and secondary DC source
Variable load can be equivalent to.Reverse transfer is identical with forward transporting mechanism.
Described former limit DC source and former limit choke induction, former limit HF switch network composition current-mode inverter circuit.
Wherein, HF switch network working method under inverter mode in former limit uses 180 ° of complementary conductive modes.
Described former limit Shunt compensation capacitorC 1It is connected in parallel on the outfan of former limit HF switch network, former limit series compensation electricity
HoldC pFormer limit Shunt compensation capacitor it is connected in parallel on the primary side winding of loosely coupled transformer after connectingC 1Two ends；Loosely coupled transformer
Vice-side winding and secondary series compensation capacitanceC sSecondary Shunt compensation capacitor it is connected in parallel on after series connectionC 2Two ends, secondary shunt compensation electricity
HoldC 2And it is connected in the input of secondary HF switch network.
Described loosely coupled transformer is made up of primary side winding and vice-side winding, and both are mutually isolated, it is achieved electric energy non-
Contact transmission.The leakage inductance model of loosely coupled transformer and mutual inductance coupling model are as it is shown on figure 3, the parameter transformation relation between two kinds of models can
To be equivalent to:
(1)
For ensureing intuitive and the simplification of checking of theory analysis, the present invention uses leakage inductance model that system carries out theoretical point
Analysis, uses mutual inductance coupling model that system carries out simulating, verifying, and the electrical block diagram of system leakage inductance model is as shown in Figure 4.With energy
As a example by amount forward push mode, former limit HF switch network work is at inverter mode, and secondary HF switch network work is in rectification
Pattern, secondary choke induction and secondary DC source can be equivalent to variable load.Reverse transfer is identical with forward transporting mechanism.
Described former limit series compensation capacitanceC pFormer limit leakage inductance with loosely coupled transformerL δ1There is series resonance, described
Series compensation capacitanceC sSecondary leakage inductance with loosely coupled transformerL δ2There is series resonance, described former limit Shunt compensation capacitorC 1
With secondary Shunt compensation capacitorC 2The common magnetizing inductance compensating loosely coupled transformerL m, there is parallel resonance.Now, system
Operating angle frequencyω 0Meet following formula:
(2)
The simplified system of Fig. 4 can be obtained as shown in Figure 5 by formula (2).Whereinu inWithi inIt is respectively output voltage and the output of inverter
Electric current；N 1:N 2The turn ratio of former secondary coil；R eqFor AC equivalent resistance；u oWithi oThe output voltage of the system of being respectively and output
Electric current.
Known to Fig. 5, system primary coil electric current with input current relation is:
(3)
System output current with the relation of input current is:
(4)
Impedance transformation principle according to transformator, Fig. 5 can be reduced to Fig. 6.Wherein,R rWithR eqEquivalent relation be:
(5)
Known by Fig. 5 and formula (3), system is in resonance angular frequencyω 0During lower work, then system primary coil electric currenti pOnly with defeated
Enter electric currenti inRelevant, primary coil electric current when input current is constanti pKeep constant, do not affected by load change；System output electricity
Streami oNot fluctuating with load change, system current stabilization exports.
Known to Fig. 6, total input impedance of systemZ inFor:
(6)
From formula (6), total input impedance of systemZ inFor purely resistive, the resonant operational angular frequency of system is born with equivalent variable
Carry size unrelated, system load change time steady operation in resonance angular frequencyω 0Under.
Described secondary HF switch network is connected on secondary Shunt compensation capacitorC 2Two ends, by high frequency sinusoidal convert alternating current
For unidirectional current, to equivalent variable load supplying.
On the basis of above-mentioned theory is analyzed, for verifying the feasibility of the present invention, as a example by energy forward push mode, instead
Identical with forward transporting mechanism to transmission.System uses the mutual inductance coupling model of loosely coupled transformer to build under energy forward push mode
The circuit model of system, as shown in Figure 7.The present invention uses the Simulink of Matlab to emulate the system shown in Fig. 7.?
In simulation process, keep input voltage size constant, make to be supported on 0.3s and suddenly change to 50 Ω from 10 Ω, by waveform
Observe, it was demonstrated that primary coil electric currenti p, load output electric currenti oAnd resonant operational frequencyω 0Do not change with the fluctuation of load, emulation
Waveform is respectively as shown in Fig. 8, Fig. 9 and Figure 10.
From Fig. 8, Fig. 9, primary coil electric current during load changei p, load output electric currenti oStill keeping constant, system can
To realize primary circuit constant current and load current stabilization output.As shown in Figure 10, before and after load change, system input reactive powerQ in
Being always 0, explanation system always works in fundamental resonant frequency when load changeω 0Under.
By theory analysis and simulating, verifying, the present invention just may be used by the design of systematic parameter based on AC impedence method
To meet the design requirement of constant current output type radio energy transmission system, both reduce design difficulty, simplify the structure of system,
Improve again the stability of system.Meanwhile, the transmitted in both directions of energy is also achieved.
Claims (4)
1. a constant current output type composite resonant network bi-directional radio energy transmission system and method for designing thereof, it is characterised in that:
This radio energy transmission system includes: former limit DC source, former limit choke induction, former limit HF switch network, the parallel connection of former limit are mended
Repay electric capacity, former limit series compensation capacitance, loosely coupled transformer, secondary series compensation capacitance, secondary Shunt compensation capacitor, secondary height
Frequently switching network, secondary choke induction and secondary DC source；Wherein, after former limit DC source is connected with former limit choke induction also
Being associated in the input of former limit HF switch network, former limit Shunt compensation capacitor is connected in parallel on the outfan of former limit HF switch network,
Former limit series compensation capacitance is connected in parallel on Shunt compensation capacitor two ends, former limit, pine coupling with the primary side winding of loosely coupled transformer after connecting
The vice-side winding of conjunction transformator is connected in parallel on secondary Shunt compensation capacitor two ends after connecting with secondary series compensation capacitance, and secondary is in parallel
Compensating electric capacity and be connected in parallel on the input of secondary HF switch network, secondary choke induction is connected in parallel on after connecting with secondary DC source
The outfan of secondary HF switch network；The former and deputy limit of whole system is mirror image, by former and deputy limit HF switch
The transmitted in both directions of network-based control feasible system energy；
A kind of specific design method of constant current output type composite resonant network bi-directional radio energy transmission system is: in systematic parameter
During design, it is ensured that the former vice-side winding material of loosely coupled transformer is identical, parameter consistent, equal turn numbers；Former limit series compensation electricity
Hold the former limit leakage inductance compensating loosely coupled transformer, make both that series resonance to occur；Secondary series compensation capacitance compensates loose coupling and becomes
The secondary leakage inductance of depressor, makes both that series resonance to occur；Former limit Shunt compensation capacitor compensates jointly with secondary Shunt compensation capacitor
The magnetizing inductance of loosely coupled transformer, makes former limit Shunt compensation capacitor and secondary Shunt compensation capacitor common and magnetizing inductance occurs
Parallel resonance.Finally, design system former limit series compensation capacitance value is equal in magnitude with secondary series compensation capacitance value, and former limit is in parallel
Compensate capacitance equal in magnitude with secondary Shunt compensation capacitor value.
2. according to a kind of constant current output type composite resonant network bi-directional radio energy transmission system described in claims 1 and
Method for designing, it is characterised in that: described former and deputy limit HF switch network is by 4 full-controlled switch devices and inverse parallel two thereof
Pole pipe composition, this full bridge structure is operable with high-frequency inversion and 2 patterns of high-frequency rectification.When energy forward transmits, former limit is high
Frequently switching network is inverse is operated in inverter mode, and secondary HF switch network work is at rectification mode；When energy back is transmitted, former
Limit HF switch network work is at rectification mode, and secondary HF switch network work is at inverter mode.
3. according to a kind of constant current output type composite resonant network bi-directional radio energy transmission system described in claims 1 and
Method for designing, it is characterised in that: former limit series compensation capacitance and secondary series compensation capacitance select that capacitance is equal in magnitude, material phase
Same noninductive electric capacity；Former limit Shunt compensation capacitor selects, with secondary Shunt compensation capacitor, the nothing that capacitance is equal in magnitude, material is identical
Electrification holds.
4. transmit system and design thereof according to a kind of constant current output type composite resonant network wireless electric energy described in claims 1
Method, it is characterised in that: described loosely coupled transformer uses Litz line coiling, and its former secondary coil inductance value is equal in magnitude, shape
Shape is identical, and ensures that the number of turn is consistent.
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| CN106787773A (en) * | 2017-03-14 | 2017-05-31 | 合肥工业大学智能制造技术研究院 | Commutator transformer without straight-through problem |
| CN108092419A (en) * | 2018-01-22 | 2018-05-29 | 天津中德应用技术大学 | Instructional device based on electromagnetic coupling radio energy-transmitting |
| CN108162775A (en) * | 2017-12-13 | 2018-06-15 | 中国科学院电工研究所 | For the electric vehicle wireless energy transform device of invariable power charging |
| CN109274183A (en) * | 2018-11-09 | 2019-01-25 | 西南交通大学 | A kind of radio energy transmission system with highly resistance offset characteristic |
| CN109474082A (en) * | 2018-12-07 | 2019-03-15 | 华中科技大学 | A kind of bidirectional radio energy Transmission system and method based on change compensation network structure |
| CN110224609A (en) * | 2019-05-23 | 2019-09-10 | 合肥工业大学 | Wireless charging magnetic coupling high-frequency inversion-rectification circuit |
| CN110544989A (en) * | 2019-09-27 | 2019-12-06 | 国网山东省电力公司济南市历城区供电公司 | wireless transmission network compensation power supply system |
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| CN108162775A (en) * | 2017-12-13 | 2018-06-15 | 中国科学院电工研究所 | For the electric vehicle wireless energy transform device of invariable power charging |
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| CN109274183A (en) * | 2018-11-09 | 2019-01-25 | 西南交通大学 | A kind of radio energy transmission system with highly resistance offset characteristic |
| CN109474082B (en) * | 2018-12-07 | 2021-12-17 | 华中科技大学 | Bidirectional wireless power transmission system and method based on variable compensation network structure |
| CN109474082A (en) * | 2018-12-07 | 2019-03-15 | 华中科技大学 | A kind of bidirectional radio energy Transmission system and method based on change compensation network structure |
| CN113950790A (en) * | 2019-03-21 | 2022-01-18 | 西门子能源环球有限责任两合公司 | DC voltage converter having a secondary resonant circuit capacitor, and method for operating a DC voltage converter |
| CN110224609A (en) * | 2019-05-23 | 2019-09-10 | 合肥工业大学 | Wireless charging magnetic coupling high-frequency inversion-rectification circuit |
| CN110571941B (en) * | 2019-09-27 | 2022-06-14 | 东南大学 | Wireless power transmission system and load identification and positioning method thereof |
| CN110571941A (en) * | 2019-09-27 | 2019-12-13 | 东南大学 | Wireless power transmission system and load identification and positioning method thereof |
| CN110544989A (en) * | 2019-09-27 | 2019-12-06 | 国网山东省电力公司济南市历城区供电公司 | wireless transmission network compensation power supply system |
| CN111585446A (en) * | 2020-05-21 | 2020-08-25 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | Bidirectional full-bridge resonant converter |
| CN111682658A (en) * | 2020-05-28 | 2020-09-18 | 哈尔滨工业大学 | Resonant cavity constant current control system for wireless power transmission LPE position detection and control method thereof |
| CN111682658B (en) * | 2020-05-28 | 2022-12-16 | 哈尔滨工业大学 | Resonant cavity constant current control system for wireless power transmission LPE position detection and control method thereof |
| CN112257931A (en) * | 2020-10-23 | 2021-01-22 | 中国科学院电工研究所 | Optimization method and system for compensation network parameters of bidirectional wireless charging system |
| CN112257931B (en) * | 2020-10-23 | 2023-08-11 | 中国科学院电工研究所 | Optimization method and system for compensating network parameters of bidirectional wireless charging system |
| CN112491161A (en) * | 2020-11-20 | 2021-03-12 | 哈尔滨工业大学 | Wireless power transmission system compensation capacitance tuning method based on series compensation circuit |
| CN112491161B (en) * | 2020-11-20 | 2022-11-04 | 哈尔滨工业大学 | Wireless power transmission system compensation capacitance tuning method based on series compensation circuit |
| CN113346632A (en) * | 2021-06-07 | 2021-09-03 | 华南理工大学 | Series-series compensation based wireless power transmission system and current sharing method |
| CN113346632B (en) * | 2021-06-07 | 2023-06-20 | 华南理工大学 | Wireless power transmission system based on series-series compensation and current sharing method |
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