CN207926289U - SS type field coupling radio energy transmission systems based on self-oscillation power supply - Google Patents
SS type field coupling radio energy transmission systems based on self-oscillation power supply Download PDFInfo
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- CN207926289U CN207926289U CN201820180875.8U CN201820180875U CN207926289U CN 207926289 U CN207926289 U CN 207926289U CN 201820180875 U CN201820180875 U CN 201820180875U CN 207926289 U CN207926289 U CN 207926289U
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Abstract
The utility model discloses a kind of SS type field coupling radio energy transmission systems based on self-oscillation power supply, including self-oscillation power supply, primary side resonator, secondary side resonator, coupled capacitor metal polar plate and load RL；Primary side resonator includes the primary side transmitting coil being connected in series with and primary side resonant capacitance C1, primary side transmitting coil includes the primary inductor L being connected in series with1With primary coil internal resistance R1；It is secondary while resonator include be connected in series with it is secondary while receiving coil and pair side resonant capacitance C2, secondary side receiving coil includes the secondary inductance L being connected in series with2With secondary coil internal resistance R2；Coupled capacitor metal polar plate connects primary side resonator and secondary side resonator；Self-oscillation power supply is connected with primary side resonator, loads RLIt is connected with secondary side resonator.The utility model is powered system using self-oscillation power supply, and system is made to be operated under eigenfrequency, and when transmission range changes, the frequency of system can be adjusted automatically, realizes constant high-caliber efficiency of transmission.
Description
Technical field
The utility model is related to the technical fields of wireless power transmission, refer in particular to a kind of SS based on self-oscillation power supply
Type field coupling radio energy transmission system.
Background technology
So far, the prevailing transmission mode of electric energy is to transmit electric energy by plain conductor, it usually needs two or more
Conducting wire for conduction electric current transmission channel is provided.Traditional wired power transmission mode not only needs a large amount of plain conductor and complexity
Stringing engineering also have to ensure that the insulation between plain conductor will remain good state, once the event such as short circuit occurs
Barrier, power outage will be caused because protective relaying device act, if protective device failure, can fire hazard, explode or
The danger such as electric shock.And this wired power transmission mode there is also metallic conductors exposed, contact electric spark, aging, contact mechanism
The safety problems such as abrasion, under moist, underwater, mine, the working environment containing flammable explosive gas, it is difficult to realize safe and reliable
Power supply, and due to the constraint of conducting wire so that the flexibility of power device substantially reduces.In order to solve wired electric energy transmission mode
The mode of limitation, wireless power transmission is come into being, and is constantly valued by the people, and this mode, which has, takes electric convenient, saving
Metals resources and the advantages that avoiding complicated stringing engineering, while solving the defect of traditional wire power transmission mode.
Field coupling wireless power transmission technology is to study one of widest wireless power transmission technology at present, is compared
Inductively for wireless power transmission technology, the transmission distance of same grade may be implemented in field coupling wireless power transmission technology
From, output power and efficiency of transmission, but its energy transmission form is alternating electric field, the transmission of energy be using barrier metallization as
A part for coupling plates transmits energy, and without being blocked by it, and electric field is limited between coupling plates and deposits substantially
Electromagnetic interference is greatly reduced.
Currently, the efficiency of transmission of traditional space electric field coupling radio energy transmission system by transmission range influenced compared with
Greatly, usual efficiency of transmission is substantially reduced with the increase of distance, is unfavorable for the practical application of system.
And the working frequency of the SS type field coupling radio energy transmission systems of additional self-oscillation power supply is by systematic parameter
What value was determined, be the inherent feature of system, therefore this frequency is known as characteristic frequency, also known as eigenfrequency.Additional power source
In self oscillatory system, the working frequency of power supply is not fixed, this is remained operating in the variation of systematic parameter
Levy frequency.And within critical transmission range, the output power and efficiency of transmission of system can be kept under eigenfrequency
It is constant.These features allow the progress that the SS type field coupling radio energy transmission systems of additional self-oscillation power supply are stablized
Electric energy transmits.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, it is proposed that a kind of SS based on self-oscillation power supply
Type field coupling radio energy transmission system, is powered system using self-oscillation power supply, and system is made to be operated in intrinsic frequency
Under rate, when transmission range changes, the frequency of system can be adjusted automatically, be realized in certain transmission range farther out
Constant high-caliber efficiency of transmission, while keeping output power constant, realize stable electric energy transmission.
To achieve the above object, technical solution provided by the utility model is：SS type electricity based on self-oscillation power supply
Field coupling radio energy transmission system, the system comprises self-oscillation power supply, primary side resonator, secondary side resonator, coupling electricity
Hold metal polar plate and load RL；The primary side resonator includes the primary side transmitting coil being connected in series with and primary side resonant capacitance C1, institute
It includes the primary inductor L being connected in series with to state primary side transmitting coil1With primary coil internal resistance R1, the primary side of the primary side resonator is humorous
Field shake with resonance angular frequencyWith primary side internal resistance loss factor Γ1=R1/2L1；The pair side resonator includes
The secondary resonant capacitance C in receiving coil and pair being connected in series with2, pair side receiving coil includes the secondary inductance being connected in series with
L2With secondary coil internal resistance R2, it is described it is secondary while resonator it is secondary while resonance field there is resonance angular frequencyWith secondary side
Internal resistance loss factor Γ2=R2/2L2；The coupled capacitor metal polar plate connection primary side resonator and secondary side resonator；
The self-oscillation power supply is connected with primary side resonator, and angular frequency is adjusted automatically with the variation of systematic parameter
Section, and the last intrinsic angular frequency stablized in system；
The load RLIt is connected with secondary side resonator, load loss coefficient Γ in corresponding resonance fieldL=RL/2L2；
The former and deputy side resonator realizes phase mutual coupling by the electric field that the coupled capacitor metal polar plate between them generates
It closes.
The intrinsic angular frequency of the system by primary side internal resistance loss factor, secondary side internal resistance loss factor, load loss coefficient,
The natural angular frequency of field coupling coefficient and former and deputy side resonator determines.
The quality factor q of the primary side resonator1=ω1/2Γ1At least more than 100, the quality of the pair side resonator because
Number Q2=ω2/2Γ2At least more than 100.
Coupled capacitor between the former and deputy side resonator is at least below primary side resonant capacitance C1With secondary side resonant capacitance C2
An order of magnitude.
The utility model compared with prior art, has the following advantages that and advantageous effect：
1, system structure is simple, and realization method is various.
2, the output power of system and efficiency of transmission are insensitive to the variation of transmission range, it can be achieved that the radio energy stablized
Transmission.
3, system is rapider to transmission range variation response.
Description of the drawings
Fig. 1 is the system circuit diagram provided in embodiment.
Fig. 2 is the relational graph of system eigenfrequency and transmission range.
Fig. 3 is the current waveform figure of primary side resonator electric current and secondary side resonator in embodiment.
Fig. 4 is the voltage oscillogram of primary side resonator voltage and secondary side resonator in embodiment.
Fig. 5 is the voltage oscillogram of coupled capacitor metal polar plate between former and deputy side in embodiment.
Fig. 6 is the relational graph of efficiency of transmission and transmission range in embodiment.
Fig. 7 is the relational graph of output power and transmission range in embodiment.
Specific implementation mode
With reference to specific embodiment, the utility model is described in further detail.
SS type field coupling radio energy transmission systems provided by the utility model based on self-oscillation power supply, base
Present principles are powered to system using self-oscillation power supply, and system is made to be operated under eigenfrequency, when transmission range occurs
When variation, the frequency of system can be adjusted automatically, and constant high-caliber transmission effect is realized in certain transmission range farther out
Rate, while keeping output power constant, stable electric energy transmission is realized, traditional field coupling radio energy is not only solved
The problem of efficiency of transmission of Transmission system declines rapidly with the increase of distance also maintains constant power output.
As shown in Figure 1, the SS type field coupling radio energy transmission systems, including self-oscillation power supply uin, primary side
Resonator, secondary side resonator, coupled capacitor metal polar plate C12With load RL；The primary side resonator includes the primary side being connected in series with
Transmitting coil and primary side resonant capacitance C1, the primary side transmitting coil includes the primary inductor L being connected in series with1In primary coil
Hinder R1, the primary side resonance field of the primary side resonator is with resonance angular frequencyWith primary side internal resistance loss factor Γ1
=R1/2L1；It is described it is secondary while resonator include be connected in series with it is secondary while receiving coil and pair side resonant capacitance C2, the pair side receives
Coil includes the secondary inductance L being connected in series with2With secondary coil internal resistance R2, it is described it is secondary while resonator it is secondary while resonance field have it is humorous
Shake angular frequencyWith secondary side internal resistance loss factor Γ2=R2/2L2；The coupled capacitor metal polar plate C12Connection is former
The resonator in resonator and pair；
The self-oscillation power supply uinIt is connected with primary side resonator, angular frequency carries out automatically with the variation of systematic parameter
It adjusts, and the last intrinsic angular frequency stablized in system；
The load RLIt is connected with secondary side resonator, load loss coefficient Γ in corresponding resonance fieldL=RL/2L2；
The former and deputy side resonator passes through the coupled capacitor metal polar plate C between them12The electric field of generation is mutual to realize
Coupling, field coupling intensity are indicated with electric field coefficient of coup κ.
The quality factor q of the primary side resonator1=ω1/2Γ1At least more than 100, the quality of the pair side resonator because
Number Q2=ω2/2Γ2At least more than 100.
Coupled capacitor between the former and deputy side resonator is at least below primary side resonant capacitance C1With secondary side resonant capacitance C2
An order of magnitude.
For easy analysis, enable the natural angular frequency of primary side resonator and secondary side resonator, Coil resistance difference equal, i.e.,
ω1=ω2=ω0, Γ1=Γ2=Γ0.The coupling mode equations of system are
Wherein, a1、a2It can be written respectively as A1eiωt、A2eiωt, wherein A1、A2Respectively a1、a2Amplitude.For the power supply coefficient in reflection extrinsic motivated source, ω is the work angular frequency of system.
For field coupling coefficient.For the coupling capacitance of metal polar plate.A is the area of metal polar plate.D is former and deputy side gold
Belong to the distance between pole plate.
Can acquire eigenfrequency value by formula (1) is
The pattern solution of system is
Wherein,
Wherein, there is gain/attenuation item in the pattern solution of systemLead to pattern a1And a2Modulus value change
Become.Stable in order to reach, self-oscillation power supply can be automatically to g0It is adjusted, until system reaches stable.The stable state of system
It is divided into two kinds of situations：
As κ >=Γ0+ΓLWhen, it is zero to enable the imaginary part of characteristic value, can with arrive
g0=2 Γ0+ΓL (5)
Can obtain intrinsic angular frequency when system is stablized is
Then
The efficiency of transmission of system is
By (8) formula it is found that the efficiency of transmission of system and field coupling coefficient κ are unrelated, i.e., when transmission range changes, system
Efficiency of transmission remains unchanged.
The output power of system is
By (9) formula it is found that the output power and field coupling coefficient κ of system are unrelated, i.e., when transmission range changes, system
Output power remains unchanged.
In another case, there is κ ＜ Γ0+ΓL.It is zero to enable the imaginary part of characteristic value, can be obtained：
Can obtain intrinsic angular frequency when system is stablized is
ω=ω0 (11)
So have
The efficiency of transmission of system is
The output power of system is
In conclusion the efficiency of transmission of system is
The output power of system is
As the above analysis, if the electric energy of additional self-oscillation power supply offer is completely by the internal resistance of primary side resonator, secondary side
Resonator internal resistance and load absorption, i.e. g0=2 Γ0+ΓL, when system is operated in κ >=Γ0+ΓLIn region, working frequency isOutput power is keptInvariable, efficiency of transmission is keptIt is constant not
Become, when system is operated in κ ＜ Γ0+ΓLIn region, working frequency is ω=ω0, output power and efficiency of transmission are with transmitting
Field coupling index variation between circuit and receiving circuit, respectivelyWith
If the intrinsic frequency of primary side resonator and secondary side resonator is f0The voltage of=1MHz, DC power supply are Vin=
200V, primary side inductance and secondary inductance are L0=253 μ H, primary side resonant capacitance and secondary side resonant capacitance are C0=100pF,
The length of side of metal polar plate is 1m, in order to make Rational Parameters, it is assumed that primary coil internal resistance and secondary coil internal resistance are R0=5
Ω, load resistance RL=50 Ω.
The intrinsic angular frequency of the SS type field coupling radio energy transmission systems based on self-oscillation power supply of the utility model
Rate is consolidated by primary side internal resistance loss factor, secondary side internal resistance loss factor, load loss coefficient, field coupling coefficient and two resonators
There is angular frequency determination.Fig. 2 is the relational graph of system eigenfrequency and transmission range, it is seen that Simulation results exist with theory analysis
It is consistent in allowable range of error.
Fig. 3, Fig. 4 and Fig. 5 are respectively 1 meter when transmission range, coupled capacitor C12When=8.85pF, former and deputy side resonator
Electric current, voltage and coupled capacitor C12Voltage oscillogram.
By formula (15) can obtain system efficiency of transmission and transmission range relation curve it is as shown in Figure 6.Wherein, discrete solid
The result of circle indication circuit emulation.It will be appreciated from fig. 6 that when system is operated in κ >=Γ0+ΓLIn region, working frequency isEfficiency of transmission is keptIt is invariable, when system is operated in κ ＜ Γ0+ΓLIn region,
Its working frequency is ω=ω0, efficiency of transmission is with the field coupling index variation between transmitting and receiving circuit
By formula (16) can obtain system output power and transmission range relation curve it is as shown in Figure 7.Wherein, discrete solid
The result of circle indication circuit emulation.As shown in Figure 7, when system is operated in κ >=Γ0+ΓLIn region, working frequency isOutput power is keptIt is invariable, when system is operated in κ ＜ Γ0+ΓLRegion
Interior, working frequency is ω=ω0, output power is with the field coupling index variation between transmitting and receiving circuit
As the above analysis, the SS type field coupling wireless power transmissions based on self-oscillation power supply of the utility model
System always works in eigenfrequency in the case where transmission range changes, and realizes the automatic adjustment of frequency.And certain
Distance range in, system can keep output power and efficiency of transmission constant, realize stable electric energy transmission.Compare biography
The field coupling radio energy transmission system of system, the utility model have simple in structure, fast response time, implementation method various
Advantage is worthy to be popularized.
Embodiment described above is only the preferred embodiment of the utility model, and the implementation of the utility model is not limited with this
Range, therefore change made by all shapes according to the utility model, principle, it should all cover within the protection scope of the present utility model.
Claims (4)
1. the SS type field coupling radio energy transmission systems based on self-oscillation power supply, it is characterised in that：The system comprises
Self-oscillation power supply, primary side resonator, secondary side resonator, coupled capacitor metal polar plate and load RL；The primary side resonator packet
Include the primary side transmitting coil being connected in series with and primary side resonant capacitance C1, the primary side transmitting coil includes the primary side electricity being connected in series with
Feel L1With primary coil internal resistance R1, the primary side resonance field of the primary side resonator is with resonance angular frequencyAnd primary side
Internal resistance loss factor Γ1=R1/2L1；It is described it is secondary while resonator include be connected in series with it is secondary while receiving coil and secondary side resonant capacitance
C2, pair side receiving coil includes the secondary inductance L being connected in series with2With secondary coil internal resistance R2, the pair of pair side resonator
Side resonance field has resonance angular frequencyWith secondary side internal resistance loss factor Γ2=R2/2L2；The coupled capacitor gold
Belong to pole plate connection primary side resonator and secondary side resonator；
The self-oscillation power supply is connected with primary side resonator, and angular frequency automatically adjusts with the variation of systematic parameter,
And the last intrinsic angular frequency stablized in system；
The load RLIt is connected with secondary side resonator, load loss coefficient Γ in corresponding resonance fieldL=RL/2L2；
The former and deputy side resonator is intercoupled by the electric field that the coupled capacitor metal polar plate between them generates to realize.
2. the SS type field coupling radio energy transmission systems according to claim 1 based on self-oscillation power supply, special
Sign is：The intrinsic angular frequency of the system by primary side internal resistance loss factor, secondary side internal resistance loss factor, load loss coefficient,
The natural angular frequency of field coupling coefficient and former and deputy side resonator determines.
3. the SS type field coupling radio energy transmission systems according to claim 1 based on self-oscillation power supply, special
Sign is：The quality factor q of the primary side resonator1=ω1/2Γ1At least more than 100, the quality of the pair side resonator because
Number Q2=ω2/2Γ2At least more than 100.
4. the SS type field coupling radio energy transmission systems according to claim 1 based on self-oscillation power supply, special
Sign is：Coupled capacitor between the former and deputy side resonator is at least below primary side resonant capacitance C1With secondary side resonant capacitance C2One
A order of magnitude.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321944A (en) * | 2018-02-02 | 2018-07-24 | 华南理工大学 | SS type field coupling radio energy transmission systems based on self-oscillation power supply |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321944A (en) * | 2018-02-02 | 2018-07-24 | 华南理工大学 | SS type field coupling radio energy transmission systems based on self-oscillation power supply |
| CN108321944B (en) * | 2018-02-02 | 2023-09-26 | 华南理工大学 | SS type electric field coupling wireless power transmission system based on self-oscillation power supply |
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