CN105226952A - A kind of constant current constant frequency inductively transmission system and method for designing thereof - Google Patents
A kind of constant current constant frequency inductively transmission system and method for designing thereof Download PDFInfo
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- CN105226952A CN105226952A CN201510593237.XA CN201510593237A CN105226952A CN 105226952 A CN105226952 A CN 105226952A CN 201510593237 A CN201510593237 A CN 201510593237A CN 105226952 A CN105226952 A CN 105226952A
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- reactive power
- power compensation
- current
- compensation mechanism
- mutual inductance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a kind of constant current constant frequency inductively transmission system and method for designing thereof, this system comprises DC power supply, high-frequency inversion device, Yuan Bian reactive power compensation mechanism, Mutual Inductance Coupling mechanism, secondary reactive power compensation mechanism, straightening and filtering unit and variable load.It is characterized in that: the wireless transmission being achieved former and deputy limit electric energy by Mutual Inductance Coupling mechanism, after the high frequency sinusoidal alternating current that Mutual Inductance Coupling mechanism secondary picks up carries out rectifying and wave-filtering by straightening and filtering unit, constant output current and entire system works in complete resonance condition, can not change with the change of load, meet the power demands of current mode variable load.Its remarkable result is: by certain former and deputy limit reactive power compensation mechanism topology design and System Parameter Design, the load current of the system that achieves under varying load condition and the constant output of former limit resonance current, and ensure that the stability of system operating frequency, overall system architecture is simple, safe and reliable.
Description
Technical field
The invention belongs to wireless power transmission field, be specifically related to a kind of constant current constant frequency inductively transmission system and method for designing thereof.
Background technology
In recent years, wireless power transmission technology obtains develop rapidly, and the product applying this technology is on the increase.Wherein, inductively coupled power transfer (ICPT) technology is a kind of flexible, the practical and novel wireless power transmission technology based on electromagnetic induction principle, is widely applied in fields such as medical treatment, traffic, robot and oil exploitations.In commercial Application, constant-current source is often applied to battery charging, instrument and meter for automation and sensor power and LED drives.
In ICPT system, in order to improve system band load capacity, load incision, cut out and change time, usually require that system exports to the electric current approximately constant of load; And in order to improve the ability of the multiple pickup load of system band, usually require system former limit resonance current and system resonance operating frequency approximately constant.In order to realize above-mentioned target, current research mainly concentrates on introduces close loop negative feedback control respectively for different control objectives.As in order to ensure that system exports to the current constant of load, document " noncontact inductively coupled power transfer and control technology and application study thereof " proposes to be connected in series DC-DC converter after rectification link, realizes the constant control to output current.Constant in order to ensure system former limit resonance current, document " research of inductive electric energy transmission system energy injection control method " proposes the control method of energy injection, by control to inject resonant network energy number control the amplitude size of former limit resonance current; Document " inductive electric energy transmission system parameter identification and current constant control ", by sealing in DC-DC link at the input of inverter, regulates inverter busbar voltage, changes former limit resonance current; Document " non-contact electric energy transmission system current constant control strategy " proposes to adopt phase shifting control strategy, and by detecting the deviation between actual resonance current effective value and reference current effective value, by-pass cock pipe pulse phase shifting angle controls former limit resonance current.In order to ensure that system works in complete resonance condition all the time, document " Afrequencycontrolmethodforregulatingwirelesspowertoimpla ntabledevices " proposes the resonant parameter on-line tuning method based on switching capacity, by the ON time of control capacitance, to realize system resonance operating frequency constant; Similar, document " the frequency stabilization Journal of Sex Research of non-contact electric energy transmission system " proposes the resonant parameter on-line tuning strategy based on phased inductance, by adjusting the angle of flow of phased inductance in real time, change and be connected in parallel on equivalent inductance value on resonant network, thus maintain the constant of system resonance operating frequency.
Although above-mentioned control method achieves its control objectives, improve Systematical control precision, add system cost simultaneously, make system configuration more complicated, fail safe and the reliability of system will certainly be reduced.
Summary of the invention
For in current ICPT system, in order to make load constant output current, former limit resonance current is constant and system resonance operating frequency stable, the close loop negative feedback introduced for different control objectives controls, thus cause system configuration complicated, cost is high, the problem of the low and poor reliability of fail safe, the present invention proposes a kind of NEW TYPE OF COMPOSITE mode of resonance inductively coupled power transfer system, carry out nature by system structure design and parameter designing and meet above-mentioned each control objectives, both system configuration was simplified, save system cost, turn improve the safety and reliability of system.
The technical scheme that the present invention adopts for its technical problem of solution is: this system comprises DC power supply, high-frequency inversion device, Yuan Bian reactive power compensation mechanism, Mutual Inductance Coupling mechanism, secondary reactive power compensation mechanism, straightening and filtering unit and variable load.
DC power supply produces high frequency square wave alternating current through high-frequency inversion device, high frequency square wave alternating current is transferred to load-side through Yuan Bian reactive power compensation mechanism, Mutual Inductance Coupling mechanism and secondary reactive power compensation mechanism, provides constant dc to after straightening and filtering unit current mode variable load.
Described Yuan Bian reactive power compensation mechanism adopts inductance, electric capacity series and parallel mode, wherein, and the electric capacity C in Yuan Bian reactive power compensation mechanism
pwith the former limit leakage inductance L in Mutual Inductance Coupling mechanism
σ 1occur parallel resonance, and with the inductance L in Yuan Bian reactive power compensation mechanism
1also there is parallel resonance.
Described secondary reactive power compensation mechanism adopts electric capacity, electric capacity series and parallel mode, wherein, and the secondary leakage inductance L in Mutual Inductance Coupling mechanism
σ 2with the series compensation capacitance C in secondary reactive power compensation mechanism
sthere is series resonance, the magnetizing inductance L in Mutual Inductance Coupling mechanism
mwith the Shunt compensation capacitor C in secondary reactive power compensation mechanism
1there is parallel resonance.
Beneficial effect, owing to have employed such scheme, control to realize the radio energy transmission system of the constant and system resonance operating frequency constant of load constant output current, former limit resonance current compared to the close loop negative feedback that adopts respectively existed at present, this system just can realize above-mentioned control objectives by means of only former and deputy limit reactive power compensation mechanism topology design and System Parameter Design, thus simplify system configuration, save system cost, improve the safety and reliability of system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, DC power supply; 2, high-frequency inversion device; 3, Yuan Bian reactive power compensation mechanism; 4, Mutual Inductance Coupling mechanism; 5, secondary reactive power compensation mechanism; 6, straightening and filtering unit; 7, variable load.
The leakage inductance equivalent model of Tu2Shi Mutual Inductance Coupling mechanism and mutual inductance equivalent model.
Fig. 3 is the preliminary reduced graph of Fig. 1 system.
Fig. 4 is the final reduced graph of Fig. 1 system.
Fig. 5 is the load output current simulation result schematic diagram of Fig. 1 system.
Fig. 6 is the former limit resonance current simulation result schematic diagram of Fig. 1 system.
Fig. 7 is input active power and the reactive power simulation result schematic diagram of Fig. 1 system.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail:
As shown in Figure 1: a kind of constant current constant frequency inductively coupled power transfer system is formed primarily of DC power supply 1, high-frequency inversion device 2, Yuan Bian reactive power compensation mechanism 3, Mutual Inductance Coupling mechanism 4, secondary reactive power compensation mechanism 5, straightening and filtering unit 6, variable load 7.
Described DC power supply 1 produces high frequency square wave alternating current through high-frequency inversion device 2, and wherein, high-frequency inversion device 2 adopts voltage-type full-bridge inverting mode, and four power switch pipes adopt 180 ° of complementary conduction modes.
The high frequency square wave alternating current that described high-frequency inversion device 2 produces becomes high frequency sinusoidal alternating current through Yuan Bian reactive power compensation mechanism 3, is transferred to secondary reactive power compensation mechanism 5 side by Mutual Inductance Coupling mechanism 4.
Described Yuan Bian reactive power compensation mechanism 3 adopts inductance, electric capacity series and parallel mode, wherein, and the electric capacity C in Yuan Bian reactive power compensation mechanism 3
pwith the former limit leakage inductance L in Mutual Inductance Coupling mechanism 4
σ 1occur parallel resonance, and with the inductance L in Yuan Bian reactive power compensation mechanism 3
1also there is parallel resonance.I.e. system operating frequency ω
0meet following formula:
The former secondary of described Mutual Inductance Coupling mechanism 4 is mutually isolated, be not in contact with each other, thus realizes the wireless transmission of energy.As shown in Figure 2, wherein, the Parameter Switch relation between two kinds of equivalent models is as follows for the leakage inductance equivalent model of Mutual Inductance Coupling mechanism 4 and mutual inductance equivalent model:
In the present invention, theory analysis adopts Mutual Inductance Coupling mechanism leakage inductance equivalent model, and emulation experiment adopts Mutual Inductance Coupling mechanism mutual inductance equivalent model.
Described secondary reactive power compensation mechanism 5 adopts electric capacity, electric capacity series and parallel mode, wherein, and the secondary leakage inductance L in Mutual Inductance Coupling mechanism 4
σ 2with the series compensation capacitance C in secondary reactive power compensation mechanism 5
sthere is series resonance, the magnetizing inductance L in Mutual Inductance Coupling mechanism 4
mwith the Shunt compensation capacitor C in secondary reactive power compensation mechanism 5
1there is parallel resonance.I.e. now system operating frequency ω
0meet following formula:
Convolution (1), formula (3) are known: system operating frequency meets following formula
From formula (3), in Fig. 1, system can be simplified to shown in Fig. 3.Wherein, U
in, I
inbe respectively inverter output voltage, electric current; I
pfor primary coil resonance current; N
1: N
2for former secondary coil turn ratio; R
eqfor AC equivalent resistance; U
o, I
obe respectively system output AC equivalent voltage, alternating current equivalent electric current.
As shown in Figure 3:
According to the impedance transformation principle of Norton equivalent principle and transformer, Fig. 3 can be simplified to Fig. 4.Wherein R
rwith R
eqrelation as follows:
From (1) formula, under system resonance operating frequency, L
1with C
pthere is parallel resonance, so, as shown in Figure 4:
(7) formula is substituted into (5) Shi Ke get:
From formula (7), formula (8), if system works is in resonance frequency omega
0place, then system former limit resonance current is constant, can not, by the impact of varying load, be conducive to producing stable Energy Transfer field; And system output current also will keep constant, can not change with the change of load, namely system will have current source characteristic.
From figure (3), system input total impedance Z
infor:
(1) formula is substituted into (9) formula
As can be seen from (10) formula, system input total impedance imaginary part is zero, and system resonance operating frequency and variable load size have nothing to do, and namely system has wen-frequency characteristics.
Described straightening and filtering unit 6 carries out rectification, filtering to the high frequency sinusoidal alternating current entering into secondary reactive power compensation mechanism 5, thus provides constant dc for current mode variable load 7.Wherein, straightening and filtering unit 6 adopts the uncontrollable rectification circuit of bridge-type and LC filter.
On the basis that above-mentioned theory is analyzed, based on Matlab/Simulink software, simulation analysis is carried out to said system.In simulation process, in order to analog variable load is on the impact of system output current, former limit resonance current and system resonance operating frequency, suppose that load is undergone mutation when 0.7s, 10 Ω are sported by 5 Ω, observe the change of above-mentioned three system parameterss with this understanding, the simulation result obtained is respectively as shown in Fig. 5, Fig. 6, Fig. 7.
From Fig. 5, Fig. 6 simulation result, before and after variable load change, system output current and former limit resonance current can keep steady state well, and namely this system has current stabilization fan-out capability.From Fig. 7 simulation result, before and after variable load change, system input reactive power is always zero, and can not change with the change of load, namely system has wen-frequency characteristics well.
Known by analyzing above, the Mutual Inductance Coupling mechanism electric energy transmission system in the present invention and Parameters design thereof can realize the constant and system resonance operating frequency of system output current constant, former limit resonance current well and stablize.Compared to the system adopting multiple close loop negative feedback to control, this system configuration is simple, and cost is low, and safety and reliability is high.
Claims (2)
1. constant current constant frequency is a transmission system inductively, and this system comprises DC power supply, high-frequency inversion device, Yuan Bian reactive power compensation mechanism, Mutual Inductance Coupling mechanism, secondary reactive power compensation mechanism, straightening and filtering unit and variable load;
Described Yuan Bian reactive power compensation mechanism adopts inductance, electric capacity series and parallel mode;
Described secondary reactive power compensation mechanism adopts electric capacity, electric capacity series and parallel mode.
2. a kind of constant current constant frequency as claimed in claim 1 inductively transmission system and method for designing thereof, is characterized in that: the electric capacity in Yuan Bian reactive power compensation mechanism
c pwith the former limit leakage inductance in Mutual Inductance Coupling mechanism
l σ 1occur parallel resonance, and with the inductance in Yuan Bian reactive power compensation mechanism
l 1there is parallel resonance; Electric capacity in secondary reactive power compensation mechanism
c swith the secondary leakage inductance in Mutual Inductance Coupling mechanism
l σ 2there is series resonance; Electric capacity in secondary reactive power compensation mechanism
c 1with the magnetizing inductance in Mutual Inductance Coupling mechanism
l mthere is parallel resonance.
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Cited By (9)
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| CN106208419A (en) * | 2016-09-14 | 2016-12-07 | 中国矿业大学 | A kind of constant current output type composite resonant network bi-directional radio energy transmission system and method for designing thereof |
| CN108039778A (en) * | 2017-12-19 | 2018-05-15 | 重庆大学 | Constant pressure and flow WPT system and its Parameters design based on LCL-LCC compensation networks |
| 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 |
| CN109190290A (en) * | 2018-09-25 | 2019-01-11 | 河北工业大学 | Method for analyzing relationship between the coefficient of coup and power in orthogonal electricity pickup |
| CN109768628A (en) * | 2019-01-17 | 2019-05-17 | 西南交通大学 | A kind of target area method for shielding and the inductive electric energy transmission system using it |
| CN110554236A (en) * | 2019-09-30 | 2019-12-10 | 福州大学 | Frequency online detection method for constant-voltage or constant-current output of wireless power transmission |
| CN111614343A (en) * | 2020-06-09 | 2020-09-01 | 上海理工大学 | SP type ICPT system filter design method and system |
| 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 |
| CN111817574A (en) * | 2020-08-06 | 2020-10-23 | 云南电网有限责任公司电力科学研究院 | Method, system and storage medium for LCC resonant converter parameter design |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208419A (en) * | 2016-09-14 | 2016-12-07 | 中国矿业大学 | A kind of constant current output type composite resonant network bi-directional radio energy transmission system and method for designing thereof |
| 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 |
| CN108039778A (en) * | 2017-12-19 | 2018-05-15 | 重庆大学 | Constant pressure and flow WPT system and its Parameters design based on LCL-LCC compensation networks |
| CN108039778B (en) * | 2017-12-19 | 2019-08-13 | 重庆大学 | Constant pressure and flow WPT system and its Parameters design based on LCL-LCC compensation network |
| CN109190290A (en) * | 2018-09-25 | 2019-01-11 | 河北工业大学 | Method for analyzing relationship between the coefficient of coup and power in orthogonal electricity pickup |
| CN109190290B (en) * | 2018-09-25 | 2023-11-03 | 河北工业大学 | Method for analyzing relation between coupling coefficient and power in quadrature pick-up |
| 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 |
| CN109768628A (en) * | 2019-01-17 | 2019-05-17 | 西南交通大学 | A kind of target area method for shielding and the inductive electric energy transmission system using it |
| CN110554236A (en) * | 2019-09-30 | 2019-12-10 | 福州大学 | Frequency online detection method for constant-voltage or constant-current output of wireless power transmission |
| CN110554236B (en) * | 2019-09-30 | 2023-12-19 | 福州大学 | Frequency online detection method for constant voltage or constant current output of wireless power transmission |
| 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 |
| CN111614343B (en) * | 2020-06-09 | 2023-04-11 | 上海理工大学 | SP type ICPT system filter design method and system |
| CN111614343A (en) * | 2020-06-09 | 2020-09-01 | 上海理工大学 | SP type ICPT system filter design method and system |
| CN111817574A (en) * | 2020-08-06 | 2020-10-23 | 云南电网有限责任公司电力科学研究院 | Method, system and storage medium for LCC resonant converter parameter design |
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