CN207835168U - Serial-parallel type radio energy transmission system based on negative resistance - Google Patents
Serial-parallel type radio energy transmission system based on negative resistance Download PDFInfo
- Publication number
- CN207835168U CN207835168U CN201721305283.6U CN201721305283U CN207835168U CN 207835168 U CN207835168 U CN 207835168U CN 201721305283 U CN201721305283 U CN 201721305283U CN 207835168 U CN207835168 U CN 207835168U
- Authority
- CN
- China
- Prior art keywords
- resistance
- negative resistance
- circuit
- receiving circuit
- radiating circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of series and parallel type radio energy transmission system based on negative resistance, including the negative resistance being connected and radiating circuit and the receiving circuit being connected and load；Radiating circuit includes the primary side capacitance being connected in series with and primary side transmitting coil, and primary side transmitting coil includes the primary side inductance being connected in series with and radiating circuit internal resistance, and radiating circuit internal resistance refers to all positive resistances of radiating circuit in addition to secondary side is reflected into the resistance of primary side；Receiving circuit includes the secondary capacitance in receiving coil and pair being connected in parallel, and secondary side receiving coil includes the secondary inductance being connected in series with and receiving circuit internal resistance, and receiving circuit internal resistance refers to all positive resistances of receiving circuit in addition to load.The utility model generates the property of energy using negative resistance, the energy supply to circuit is realized, to instead of the high-frequency inversion source in traditional series and parallel type radio energy transmission system so that the structure of system is simpler, working frequency higher, efficiency of transmission are more stable.
Description
Technical field
The utility model is related to the fields of wireless power transmission or wireless power transmission technology, refer in particular to a kind of based on negative resistance
Serial-parallel type radio energy transmission system.
Background technology
Wireless power transmission technology may be implemented to be electrically isolated completely between power supply and electrical equipment, have safety, can
It leans on, flexible advantage.Early at the end of the 19th century, Ni Gula teslas (Nikola Tesla) utilize wireless power transmission principle,
A light bulb has been lighted in the case of no any conducting wire connection.Wireless power transmission based on magnet coupled resonant type is MIT
The breakthrough that is obtained in wireless power transmission field of scholar passed in radio energy since being disclosed and delivering within 2007
Defeated field causes very big repercussion, and more and more scholars are added to the basic research and application of wireless power transmission technology
Exploitation.
In current resonance type wireless electric energy transmission system, high frequency, highly reliable, large power supply realization are always should
Technology is applied to an important problem of high power load transmission of electricity.Traditional radio energy transmission system is usually by driving source, hair
Transmit-receive radio road, receiving circuit and load composition, wherein driving source determines systematic parameter and conversion and control as system power supply
Part becomes most important part in wireless power transmission.In order to meet radio energy transmission system high frequency, efficient hair
Exhibition trend, generally use switching mode driving source (power amplifier) such as D classes, E power-like amplifiers, although this power-like amplifier
Theoretical efficiency reached 100%, but output power is relatively low, is only applicable to low power application scenario.And it is powerful at present
Application scenario mostly uses the bridge-type inverter of IGBT and MOSFET pipes composition, while coordinating different Sofe Switch algorithms to realize electricity
The wireless transmission of energy, but its working frequency is low, transmission range is short.Therefore, by factors such as power switch tube and circuit topological structures
Restriction realize that high frequency (MHz or more), highly reliable, high power switch converter are also quite tired under existing technical conditions
It is difficult.
Negative resistance is a kind of active block meeting Ohm's law and connection in series-parallel rule.With resistance on the contrary, the electricity of negative resistance
Pressure, current first harmonics phase difference be π, power in circuit be negative, i.e., to circuit release electric energy.Negative resistance has a variety of realizations
Mode is such as constituted using positive resistance and amplifier.Previous negative resistance is used to improve the input impedance of inverting amplifier more, neutralizes LC
The positive resistance etc. of oscillation circuit, and seldom to power for circuit as power supply.Negative resistance compares high-frequency inverter, has system
It is simple in structure, without using MOSFET, the advantages that very high working frequency can be reached, therefore current high-frequency inverter can be solved
Can not further high frequency problem.And the working frequency of system is determined by the value of component in circuit.In a work frequency
Under rate, the efficiency of transmission of system may remain in very high level, and as the change of distance is kept in a very long segment limit
Substantially constant, realize radio energy stablizes transmission.
Invention content
The purpose of the utility model is to overcome the deficiencies in the prior art, a kind of series connection-based on negative resistance is provided simultaneously
Connection type radio energy transmission system generates the property of energy using negative resistance, realizes the energy supply to circuit, to instead of tradition
Serial-parallel type radio energy transmission system in high-frequency inversion source so that the structure of system is simpler, and working frequency is more
Height, efficiency of transmission are more stable.
To achieve the above object, technical solution provided by the utility model is：Serial-parallel type based on negative resistance without
Line electric energy transmission system, including the negative resistance and radiating circuit and the receiving circuit being connected and load, the hair that are connected
Transmit-receive radio road and receiving circuit realize the wireless transmission of electric energy by way of electromagnetic induction coupling；The radiating circuit includes series connection
The primary side capacitance and primary side transmitting coil of connection, the primary side transmitting coil include the primary side inductance and radiating circuit being connected in series with
Internal resistance, the radiating circuit internal resistance refer to all positive resistances of radiating circuit in addition to secondary side is reflected into the resistance of primary side；It is described to connect
Receive circuit include be connected in parallel it is secondary in receiving coil and it is secondary while capacitance, it is described it is secondary while receiving coil include be connected in series with it is secondary while
Inductance and receiving circuit internal resistance, the receiving circuit internal resistance refer to all positive resistances of receiving circuit in addition to load.
Voltage, the current relationship of the negative resistance meet：vR=-RiR, phase relation satisfaction：Wherein, iRFor stream
Cross the current first harmonics of negative resistance, vRFor the voltage fundamental at negative resistance both ends, R is the resistance value of negative resistance,For vRWith iRBetween phase
Potential difference；The power of the negative resistance meets：P is the power of negative resistance ,-show that negative resistance releases energy outward
Amount.
The utility model compared with prior art, has the following advantages that and advantageous effect：
1, system structure is simple, and the make of negative resistance is varied.
2, the high frequency power source that serial-parallel type radio energy transmission system is substituted using negative resistance, can effectively be solved
The technical barrier that high frequency, high power switch converter are difficult to realize at present.
3, system operating frequency is determined by components values in circuit.Under this working frequency, system can keep very high
Efficiency, realize stable wireless power transmission.
Description of the drawings
Fig. 1 is the system circuit diagram provided in embodiment.
Fig. 2 is the oscillogram of the voltage and current of negative resistance in embodiment.
Fig. 3 is the relational graph of efficiency of transmission and transmission range in embodiment.
Specific implementation mode
With reference to specific embodiment, the utility model is described in further detail.
The basic principle for the serial-parallel type radio energy transmission system based on negative resistance that the present embodiment is provided is profit
The characteristic with negative resistance with the electric energy that releases energy, is provided out, for substituting traditional serial-parallel type wireless power transmission
High frequency power source in system, to the technical barrier for efficiently solving current high frequency, high power switch converter is difficult to realize.
As shown in Figure 1, it is the specific implementation circuit of this system, including the negative resistance-R and radiating circuit and phase being connected
The receiving circuit and load R of connectionL, the radiating circuit and receiving circuit realize electric energy by way of electromagnetic induction coupling
Wireless transmission；The radiating circuit includes the primary side capacitance C being connected in series with1With primary side transmitting coil, the primary side transmitting coil
Including the primary inductor L being connected in series with1With radiating circuit internal resistance RS1, the radiating circuit internal resistance RS1Refer to except secondary side is reflected into original
All positive resistances of radiating circuit outside the resistance on side；The receiving circuit includes the secondary electricity in receiving coil and pair being connected in parallel
Hold C2, pair side receiving coil includes the secondary inductance L being connected in series with2With receiving circuit internal resistance RS2, in the receiving circuit
Hinder RS2Refer to all positive resistances of receiving circuit in addition to load.
For easy analysis, radiating circuit internal resistance R is enabledS1With receiving circuit internal resistance RS2Parameter is all unanimously RS；Enable primary side electric
Hold C1With secondary side capacitance C2Parameter is all unanimously C；Enable primary inductor L1With secondary inductance L2Parameter is all unanimously L.
The coupling mode equations of system are：
In formula,For the intrinsic frequency of transmitting coil and receiving coil,For radiating circuit and receive electricity
The internal resistance loss factor on road,For negative resistance gain coefficient,For load factor,For falling for load resistance
Number,The coefficient of coup between transmitting and receiving circuit,Between transmitting coil and receiving coil
Mutual Inductance Coupling coefficient, mutual inductances of the M between primary side inductance and secondary inductance.
The eigenfrequency that system can then be obtained is：
Work as γ1=2 τ0+τLWhen, the electric energy that the negative resistance that is connected with radiating circuit is provided to circuit is completely by radiating circuit
Internal resistance RS1, receiving circuit internal resistance RS2With load RLIt absorbs.
Assuming that the primary power of system is stored in pattern a1In, if a1(0)=1, a2(0)=0 pattern a can, then be obtained1And a2's
Expression formula is：
Then：
The efficiency of transmission of system is：
By above-mentioned equation it is found that if the electric energy that negative resistance provides is inhaled by radiating circuit internal resistance, receiving circuit internal resistance and load completely
It receives, i.e. γ1=2 τ0+τLWhen, when system is operated in κ >=τ0+τLIn region, working frequency is
Efficiency of transmission is keptIt is invariable, when system is operated in κ ＜ τ0+τLIn region, working frequency is ω=ω0, pass
Defeated efficiency changes with the coefficient of coup between transmitting and receiving circuit, is
If the intrinsic frequency of transmitting coil and receiving coil is f0=2MHz, primary side inductance and secondary inductance are L=10 μ
H, primary side capacitance and secondary side capacitance are C=0.633nF, and radiating circuit internal resistance and receiving circuit internal resistance are RS=0.5 Ω is born
Load resistance is RL=2000 Ω.
The voltage fundamental of negative resistance, current first harmonics relationship meet：vR=-RiR, phase relation satisfaction：Output work
Rate meetsBy taking Mutual Inductance Coupling coefficient k=0.1 as an example, the voltage fundamental of negative resistance, electric current base as shown in Figure 2
The phase difference of wave is π, i.e., discharges electric energy outward.
By formula (6) can obtain system efficiency of transmission and transmission range relation curve as shown on the solid line in figure 3, solid dot is then
It is the efficiency of transmission of the variant transmission range obtained by PSIM circuit simulations, it can be seen that theory analysis is protected with simulation result
It holds consistent.In the electric energy for meeting negative resistance offer completely by radiating circuit internal resistance, receiving circuit internal resistance and load absorption, that is, exist
γ1=2 τ0+τLUnder conditions of, when system is operated in κ >=τ0+τLIn region, efficiency of transmission is keptIt is invariable, when being
System is operated in κ ＜ τ0+τLIn region, efficiency of transmission changes with the coefficient of coup between transmitting and receiving circuit, is
As the above analysis, the serial-parallel type radio energy transmission system based on negative resistance of the utility model is born
Resistance has the property of delivered power, electric energy is provided to circuit, effectively instead of the effect of high frequency power source so that system
Structure is simpler, and simultaneous transmission efficiency can keep substantially constant in a certain range, is conducive to the application in more occasions,
The advantages of the utility model, is it is clear that be worthy to be popularized.
The examples of implementation of the above are only the preferred embodiment of the utility model, not limit the utility model with this
Practical range, therefore change made by all shapes according to the utility model, principle, it should all cover in the scope of protection of the utility model
It is interior.
Claims (2)
1. the serial-parallel type radio energy transmission system based on negative resistance, it is characterised in that：Including the negative resistance that is connected and
The side that radiating circuit and the receiving circuit being connected and load, the radiating circuit and receiving circuit are coupled by electromagnetic induction
Formula realizes the wireless transmission of electric energy；The radiating circuit includes the primary side capacitance being connected in series with and primary side transmitting coil, the original
Edge emitting coil includes the primary side inductance being connected in series with and radiating circuit internal resistance, and the radiating circuit internal resistance refers to except secondary side is reflected
To all positive resistances of radiating circuit outside the resistance of primary side；The receiving circuit includes the secondary side receiving coil being connected in parallel and pair
Side capacitance, pair side receiving coil includes the secondary inductance being connected in series with and receiving circuit internal resistance, the receiving circuit internal resistance
Refer to all positive resistances of receiving circuit in addition to load；The electric energy that the negative resistance provides is completely by the radiating circuit
Resistance, the receiving circuit internal resistance and the load absorption, i.e. γ1=2 τ0+τL；When the system is operated in κ >=τ0+τLIn region,
Its working frequency isEfficiency of transmission is keptIt is invariable, when the system is operated in
κ<τ0+τLIn region, working frequency is ω=ω0, efficiency of transmission is with the coupling between the radiating circuit and the receiving circuit
Index variation is closed, isWherein, ω0For the intrinsic of the transmitting coil and the receiving coil
Frequency, ω are the working frequency of the system, τ0For the internal resistance loss factor of the radiating circuit and the receiving circuit, γ1For
Negative resistance gain coefficient, τLFor load factor, the coefficients of coup of the κ between the radiating circuit and the receiving circuit.
2. the serial-parallel type radio energy transmission system according to claim 1 based on negative resistance, it is characterised in that：
Voltage, the current relationship of the negative resistance meet：vR=-RiR, phase relation satisfaction：Wherein, iRTo flow through negative resistance
Current first harmonics, vRFor the voltage fundamental at negative resistance both ends, R is the resistance value of negative resistance,For vRWith iRBetween phase difference；Institute
The power for stating negative resistance meets：P is the power of negative resistance ,-show that negative resistance releases energy outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721305283.6U CN207835168U (en) | 2017-10-10 | 2017-10-10 | Serial-parallel type radio energy transmission system based on negative resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721305283.6U CN207835168U (en) | 2017-10-10 | 2017-10-10 | Serial-parallel type radio energy transmission system based on negative resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207835168U true CN207835168U (en) | 2018-09-07 |
Family
ID=63384315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721305283.6U Active CN207835168U (en) | 2017-10-10 | 2017-10-10 | Serial-parallel type radio energy transmission system based on negative resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207835168U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681789A (en) * | 2017-10-10 | 2018-02-09 | 华南理工大学 | Series and parallel type radio energy transmission system based on negative resistance |
-
2017
- 2017-10-10 CN CN201721305283.6U patent/CN207835168U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681789A (en) * | 2017-10-10 | 2018-02-09 | 华南理工大学 | Series and parallel type radio energy transmission system based on negative resistance |
| CN107681789B (en) * | 2017-10-10 | 2024-04-16 | 华南理工大学 | Series-parallel wireless power transmission system based on negative resistance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106410986B (en) | A kind of fractional order radio energy transmission system for offsetting internal resistance using fractional order inductance | |
| CN207835167U (en) | Series connection based on negative resistance-tandem type radio energy transmission system | |
| US9620965B2 (en) | Fractional order series resonance system for wireless electric energy transmission | |
| WO2018201689A1 (en) | Series compensated fractional order inductive coupling wireless power transmission system | |
| Hayati et al. | Design of class E power amplifier with new structure and flat top switch voltage waveform | |
| CN207835161U (en) | Multiple-series type radio energy transmission system based on negative resistance | |
| CN110112837A (en) | The wireless power supply system of multi-emitting coils from parallel connection of coils power supply based on PT symmetry principle | |
| CN107742926A (en) | The source-series parallel connection type radio energy transmission system of no-voltage based on fractional order electric capacity | |
| CN207835168U (en) | Serial-parallel type radio energy transmission system based on negative resistance | |
| CN207835160U (en) | Parallel connection based on negative resistance-parallel connection type radio energy transmission system | |
| CN107681789A (en) | Series and parallel type radio energy transmission system based on negative resistance | |
| US20170040844A1 (en) | Efficient power transmitting terminal, contactless power transmission device and power transmission method | |
| CN103915913A (en) | Fractional order parallel-series resonance wireless power transmission system | |
| CN207926290U (en) | A kind of field coupling single line electric energy transmission system based on negative resistance | |
| CN207926287U (en) | No-voltage based on fractional order capacitance is source-series-parallel connection type radio energy transmission system | |
| CN210092970U (en) | PT symmetry principle-based wireless power supply system with multiple transmitting coils for parallel power supply | |
| CN103414254B (en) | Power matching design method of magnetic-coupling resonance wireless energy transmission system | |
| CN207835166U (en) | Serial-parallel type radio energy transmission system based on feedback resonance formula power supply | |
| CN207835173U (en) | A kind of intrinsic angular frequency control magnetic resonance SS type radio energy transmission systems | |
| CN107707032A (en) | Parallel connection type radio energy transmission system in parallel based on negative resistance | |
| CN107681790A (en) | Series connection tandem type radio energy transmission system based on negative resistance | |
| Sah et al. | Analysis and optimization of wireless power transfer link | |
| CN207368758U (en) | No-voltage based on fractional order capacitance is source-series-tandem type radio energy transmission system | |
| Kwan et al. | Link efficiency-led design of mid-range inductive power transfer systems | |
| CN107733096A (en) | Tandem type radio energy transmission system in parallel based on negative resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |