CN207368759U - Stablize the radio energy transmission system of transmission coil resonant frequency with fractional order capacitance - Google Patents
Stablize the radio energy transmission system of transmission coil resonant frequency with fractional order capacitance Download PDFInfo
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- CN207368759U CN207368759U CN201721376322.1U CN201721376322U CN207368759U CN 207368759 U CN207368759 U CN 207368759U CN 201721376322 U CN201721376322 U CN 201721376322U CN 207368759 U CN207368759 U CN 207368759U
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- capacitance
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- receiving coil
- voltage
- fractional order
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Abstract
The utility model provides the radio energy transmission system for stablizing transmission coil resonant frequency with fractional order capacitance, including high frequency power source, transmitting coil, inductance, capacitance and the equivalent internal resistance of transmitting coil, receiving coil, inductance, capacitance and the equivalent internal resistance of receiving coil, resistive load, and the controller module of transmitting coil and receiving coil；The equivalent internal resistance of transmitting coil and receiving coil is the summation of the internal resistance of each self-capacitance and inductance, and wherein capacitance includes one of following three kinds：(1) fractional order capacitance；(2) fractional order capacitance is connected with integer rank capacitance；(3) fractional order capacitance is in parallel with integer rank capacitance.The utility model circuit structure is simple, and the stabilization of resonance type wireless electric energy transmitting and receiving coil resonant frequency is realized using fractional order capacitance, and new scheme is provided for expeditiously wireless power transmission application.
Description
Technical field
Control field can be transmitted by being related to resonant radio, and in particular to stablize transmission coil resonant frequency with fractional order capacitance
Radio energy transmission system.
Background technology
Wireless power transmission technology is proposed by tesla earliest.2007, Massachusetts Institute of Technology professor M.Soljacic etc.
People proposes that magnetic coupling resonant radio can transmit, and realizes in the interior electric energy with 40% efficiency transmission 60W of 2m distances, success
Light incandescent lamp.The success of this experiment, advances the research that domestic and foreign scholars can transmit magnetic coupling resonant radio.
It is safe and reliable, flexible, convenient that wireless power transmission technology has the advantages that, has there is many products applications at present
The charging of wireless power transmission technology, such as mobile phone wireless, implantable medical device, electric automobile.But in wireless power transmission
In circuit, the interference between transmitting coil and receiving coil easily be subject to surrounding is influenced, so as to cause the self-induction and line of coil
Mutual inductance between circle changes so that wireless power transmission circuit off resonance, cause energy can not transmit or transmission efficiency
Substantially reduce.
Utility model content
The shortcomings that for currently available technology and deficiency, the utility model provide a kind of radio based on fractional order capacitance
The method that energy transmitting and receiving coil resonant frequency are stablized.
The utility model is achieved through the following technical solutions.
Stablize the radio energy transmission system of transmission coil resonant frequency with fractional order capacitance, it includes high frequency power source,
Transmitting coil, inductance, capacitance and the equivalent internal resistance of transmitting coil, receiving coil, the inductance of receiving coil, capacitance and equivalent interior
Resistance, resistive load, and the controller module of transmitting coil and receiving coil；The equivalent internal resistance of transmitting coil and receiving coil is
The summation of the internal resistance of each self-capacitance and inductance, wherein capacitance include one of following three kinds：(1) fractional order capacitance；(2) fractional order electricity
Appearance is connected with integer rank capacitance；(3) fractional order capacitance is in parallel with integer rank capacitance.
Further, positive reference potential one end of the high frequency power source is connected with one end of transmitting coil inductance, transmitting
One end of the other end of coil inductance and the capacitance of transmitting coil connects, the other end and high frequency power source of the capacitance of transmitting coil
The connection of negative reference potential one end, form closed circuit, controller module sampling high frequency power source voltage usWith transmitting coil electricity
Hold voltage uca, voltage u is obtained by wherein phase detectorsp1, then pass through comparator and reference voltage urefCompare, produce voltage
Signal controls fractional order capacitance so that transmitting coil resonant frequency is stablized；One end of inductance and receiving coil in receiving coil
One end connection of capacitance, the other end of the capacitance of receiving coil are connected with the one end loaded, the other end and receiving coil of load
The other end connection of inductance, forms closed circuit, controller module sampling receiving coil capacitance voltage ucbWith load voltage uR, lead to
Cross phase detectors therein and obtain voltage up2, then pass through comparator and reference voltage urefCompare, produce voltage signal control point
Number rank capacitance so that receiving coil resonant frequency is stablized；
The utility model detects transmitting coil power supply and the voltage on capacitance and receiving coil capacitance and resistance in real time
Property load on voltage judge whether transmitting coil and receiving coil are respectively at resonant condition.By controlling to adjust fractional order
The capacitance of capacitance maintains the resonant condition of wireless power transmission transmitting and receiving coil.
Compared with prior art, the utility model has the following advantages that and technique effect：
The utility model circuit structure is simple, using fractional order capacitance, since the capacitance of fractional order capacitance can be on demand
It is controlled to increase or reduce, therefore the utility model can stablize wireless power transmission circuit transmission in the case of various off resonances
And the resonant frequency of receiving coil.
Brief description of the drawings
Fig. 1 is the equivalent structure figure of resonant radio energy Transmission system in embodiment.
Fig. 2 is the FB(flow block) in embodiment.
Fig. 3 is embodiment mid-score rank capacitance stable resonant oscillation wireless power transmission transmitting and receiving coil resonant frequency
Simulating schematic diagram.
Fig. 4 is transmitting coil power supply and the voltage waveform on capacitance and reception line when resonance is run in embodiment
Enclose capacitance and the voltage waveform in resistive load.
Fig. 5 is transmitting coil power supply voltage and its current waveform and receiving coil when resonance is run in embodiment
Resistive load voltage and its current waveform.
Fig. 6 is the phase place change feelings of inductance change and transmitting coil power supply and voltage on capacitance in embodiment
Condition.
Embodiment
For the content of the utility model and feature is expanded on further, below in conjunction with specific implementation of the attached drawing to the utility model
Scheme is specifically described, but the implementation and protection not limited to this of the utility model, if it is noted that having below especially not detailed
Describe bright parameter in detail or symbol (component symbol) be those skilled in the art be referred to existing specification technique realize and
Understand.
The radio energy transmission system for stablizing transmission coil resonant frequency with fractional order capacitance of the utility model, its is basic
Principle is voltage in voltage, receiving coil capacitance and resistive load on real-time sampling detection transmitting coil power supply and capacitance,
Phase difference is calculated by phase discriminator, whether controller deviates 90 ° according to the value of phase difference, adjusts the capacitance of fractional order capacitance,
Resonant radio transmitting and receiving coil resonant frequency are stablized, all the time in resonant condition.
Phase detecting part uses multiplication type phase discriminator, detect in real time transmitting coil power supply, that is, high frequency power source with
Capacitance, receiving coil capacitance and the voltage in resistive load, input phase discriminator judge that transmitting coil power supply is powered on capacitance
Voltage phase difference in pressure phase difference, receiving coil capacitance and resistive load；
When detecting that voltage phase difference is less than 90 ° on transmitting coil power supply and capacitance, controller module reduces fraction
The capacitance of rank capacitance；When detecting that voltage phase difference is more than 90 ° on transmitting coil power supply and capacitance, controller module increases
Add the capacitance of fractional order capacitance；When detecting that voltage phase difference is less than 90 ° in receiving coil capacitance and resistive load, controller
Module reduces the capacitance of fractional order capacitance；When detecting that voltage phase difference is more than 90 ° in receiving coil capacitance and resistive load,
Controller module increases the capacitance of fractional order capacitance.
Such as Fig. 1, stablize the radio energy transmission system of transmission coil resonant frequency, including high frequency voltage with fractional order capacitance
Source Us, transmitting coil internal resistance R1, transmitting coil inductance L1, transmitting coil capacitance Ca, receiving coil internal resistance R2, receiving coil inductance
L2, receiving coil capacitance Cb, receiving coil resistive load R, phase detection device and comparator, wherein transmitting coil internal resistance R1With
Receiving coil internal resistance R2The summation of respectively each self-inductance internal resistance and capacitance internal resistance.Wherein, capacitance includes：(1) fractional order capacitance；
(2) fractional order capacitance is connected with integer rank capacitance；(3) fractional order capacitance is in parallel with integer rank capacitance.In actual circuit, emission lines
Enclose medium-high frequency voltage source (as high frequency power source) positive reference potential one end and inductance one end connect, the other end of inductance with
One end connection of capacitance, the other end of capacitance and negative reference potential one end of high frequency voltage source connect, and form closed circuit, sampling
Supply voltage usWith capacitance voltage uca, voltage u is obtained by phase detectorsp1, then pass through comparator and reference voltage urefThan
Compared with generation voltage signal control fractional order capacitance so that transmitting coil resonant frequency is stablized；In receiving coil one end of inductance with
One end connection of capacitance, the other end of capacitance are connected with the one end loaded, and the other end of load and the other end of inductance connect, shape
Into closed circuit, sampled capacitor voltage ucbWith load voltage uR, voltage u is obtained by phase detectorsp2, then by comparator with
Reference voltage urefCompare, produce voltage signal control fractional order capacitance (fractional order capacitance can be from tape controller) so that receive
Coil resonance frequency stabilization.
As shown in Figure 1, phase detecting part can export the phase relation of transmitting coil power supply and voltage on capacitance
And the phase relation of receiving coil capacitance and voltage in resistive load.In Fig. 1, when not resonance, flow through transmitting coil and
The electric current of receiving coil is respectively that (amount in figure corresponds to the physical quantity of foregoing corresponding device, such as R1The value of transmitting coil internal resistance,
L1For transmitting coil inductance L1Inductance value, C1For transmitting coil capacitance CaCapacitance, R2Size, C for receiving coil internal resistance2
Receiving coil capacitance value, remaining is repeated no more)：
The capacitance voltage of transmitting coil and receiving coil is respectively：
When in resonant condition, the voltage of transmitting coil and receiving coil is respectively
By formula (5) (6) as it can be seen that during resonant condition, the capacitance of transmitting coil is differed with the phase of voltage on power supply
90 °, the capacitance of receiving coil differs 90 ° with the phase of voltage in resistive load.In this example, phase detecting part uses multiplication
Type phase discriminator, capacitance is by the way of fractional order capacitance is in parallel with integer rank capacitance.In transmitting coil, with power supply electricity
On the basis of pressure, it is assumed that power supply signal is
us=Ussin(ωt) (7)
Capacitance voltage signal is
uc=Ucsin(ωt+θ) (8)
So then have
Then have after low-pass filter
Judge whether transmitting coil is in resonant condition by judging the value of formula (10).Similarly, receiving coil can also
Go to judge whether it is in resonant condition in this way.
When not resonance, if the result of formula (10) is more than 0, the resonant condition of restoring circuit will reduce fractional order capacitance
Capacitance；If the result of formula (10) is less than 0, the resonant condition of restoring circuit will increase the capacitance of fractional order capacitance.It is flowed
Journey block diagram is as shown in Figure 2.
Fig. 3 is a kind of application schematic diagram of the utility model, i.e., fractional order capacitance stable resonant oscillation wireless power transmission is launched
And simulating schematic diagram of the method for receiving coil resonant frequency under PSIM environment, the component symbol in figure is all in the software
The usual specification sheet of this area reaches, in this as examples of simulation, for a person skilled in the art without repeating again, ginseng therein
Number is also only to illustrate.
When resonance is run, its transmitting coil power supply and the voltage waveform on capacitance and receiving coil capacitance and resistance
Property load on voltage waveform it is as shown in Figure 4.
When resonance is run, its transmitting coil power supply voltage and its current waveform and receiving coil resistive load electricity
Pressure and its current waveform are as shown in Figure 5.
When transmitting coil side inductance changes (reduction), inductance change and transmitting coil power supply and voltage on capacitance
Phase place change situation it is as shown in Figure 6.Before inductance is reduced, system is in stable resonant condition；After inductance is reduced, by one section
Time, system can return to stable resonant condition.
Therefore the above-mentioned simulating, verifying feasibility and correctness of the utility model.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiment of the utility model and from described
The limitation of embodiment, the change made under other any Spirit Essences and principle without departing from the utility model, modify, replace
Generation, combination, simplify, and should be equivalent substitute mode, is included within the scope of protection of the utility model.
Claims (1)
1. stablize the radio energy transmission system of transmission coil resonant frequency with fractional order capacitance, it is characterised in that including high frequency work(
Rate source, transmitting coil, inductance, capacitance and the equivalent internal resistance of transmitting coil, receiving coil and wait the inductance of receiving coil, capacitance
Imitate internal resistance, resistive load, and the controller module of transmitting coil and receiving coil；The equivalent internal resistance of transmitting coil and receiving coil
It is the summation of the internal resistance of each self-capacitance and inductance, wherein capacitance includes one of following three kinds：(1) fractional order capacitance；(2) fraction
Rank capacitance is connected with integer rank capacitance；(3) fractional order capacitance is in parallel with integer rank capacitance；The positive reference potential one of high frequency power source
End is connected with one end of transmitting coil inductance, one end connection of the other end of transmitting coil inductance and the capacitance of transmitting coil, hair
The other end of the capacitance of ray circle and negative reference potential one end of high frequency power source connect, and form closed circuit, controller module
Sample high frequency power source voltage usWith transmitting coil capacitance voltage uca, voltage u is obtained by wherein phase detectorsp1, then pass through
Comparator and reference voltage urefCompare, produce voltage signal control fractional order capacitance so that transmitting coil resonant frequency is stablized；
One end connection of the capacitance of one end of inductance and receiving coil in receiving coil, the other end and the load of the capacitance of receiving coil
One end connects, and the other end of load is connected with the other end of receiving coil inductance, forms closed circuit, and controller module sampling connects
Take-up circle capacitance voltage ucbWith load voltage uR, voltage u is obtained by phase detectors thereinp2, then pass through comparator and ginseng
Examine voltage urefCompare, produce voltage signal control fractional order capacitance so that receiving coil resonant frequency is stablized.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2016211893141 | 2016-11-04 | ||
| CN201621189314 | 2016-11-04 |
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| CN207368759U true CN207368759U (en) | 2018-05-15 |
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| CN201721376322.1U Active CN207368759U (en) | 2016-11-04 | 2017-10-24 | Stablize the radio energy transmission system of transmission coil resonant frequency with fractional order capacitance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466767A (en) * | 2020-03-30 | 2021-10-01 | 西门子医疗有限公司 | Local coil with detuning function |
| CN113466767B (en) * | 2020-03-30 | 2024-04-19 | 西门子医疗有限公司 | Local coil with detuning function |
-
2017
- 2017-10-24 CN CN201721376322.1U patent/CN207368759U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466767A (en) * | 2020-03-30 | 2021-10-01 | 西门子医疗有限公司 | Local coil with detuning function |
| US11874350B2 (en) | 2020-03-30 | 2024-01-16 | Siemens Healthcare Gmbh | Local coil with detuning function |
| CN113466767B (en) * | 2020-03-30 | 2024-04-19 | 西门子医疗有限公司 | Local coil with detuning function |
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