CN108306422A - The transmission of resonance type wireless electric energy is detached from detection method and system without traffic load - Google Patents
The transmission of resonance type wireless electric energy is detached from detection method and system without traffic load Download PDFInfo
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- CN108306422A CN108306422A CN201711487086.5A CN201711487086A CN108306422A CN 108306422 A CN108306422 A CN 108306422A CN 201711487086 A CN201711487086 A CN 201711487086A CN 108306422 A CN108306422 A CN 108306422A
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- electric energy
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- electric current
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 46
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 230000008859 change Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H02J7/025—
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of transmission of resonance type wireless electric energy detection method and system are detached from without traffic load, the electric current for detecting the power end of resonance type wireless electric energy transmission system terminates electric energy transmission when the change rate of electric current increases within the unit interval of the input terminal.Circuit topological structure of the present invention is relatively simple；Eliminate communication links so that cost significantly reduces；Compared with previous circuit pair, this is simple in structure, easy to operate；Waveform variation is apparent, and detection reliability is high, and action is fast.
Description
Technical field
The present invention relates to test field of measuring technique, and in particular, to one kind being suitable for resonance type wireless electric energy transmission system
In system detection method and system are detached from without traffic load.
Background technology
Resonance type wireless electric energy transmission system changes the electric energy transmission mode using plain conductor as medium, is connect by load
Receiving end and power supply transmitting terminal establish resonance access, and to realize power end to the energy transmission of load end, this mode reduces
The use of plain conductor overcomes aging circuit present in plain conductor, conductor easily exposed and power circuit and has a contact
The problems such as spark.Resonance type wireless electric energy transmission system makes electrical equipment break away from the constraint of wire socket, and circuit is not present
Contact sparking problem, therefore electric energy conveniently, safely and flexibly use aspect have extensive foreground.With wireless charging
The development of technology, to the transimission power, efficiency of transmission and stability of wireless charging technology, more stringent requirements are proposed.Traditional circuit
In, input is surveyed and output is surveyed through communication connection, and circuit is complex, and stability is poor.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of transmission of resonance type wireless electric energy without communication
Load is detached from detection method and system.
It is detached from detection method without traffic load according to a kind of resonance type wireless electric energy transmission provided by the invention, including：
Detect the electric current of the power end of resonance type wireless electric energy transmission system, the change rate of electric current within the unit interval of the input terminal
Electric energy transmission is terminated when increase.
Preferably, when the resonance type wireless electric energy transmission system carries out electric energy transmission, the electric current I of power end1For
Wherein, U is voltage, and ω is resonance angular frequency, mutual inductances of the M between two coils, RpFor primary side equivalent internal resistance, RsFor
Secondary side equivalent internal resistance, RlFor equivalent load, when completing to charge, equivalent load RlBecome infinitely great, the electric current I of input terminal1Have one
A increased process.
It is detached from detecting system without traffic load according to a kind of resonance type wireless electric energy transmission provided by the invention, including：
Current sensing means, is set to the input terminal of resonance type wireless electric energy transmission system, detects the input terminal in real time
Electric current；
Processing circuit connects the current sensing means, calculates change rate of the electric current detected within the unit interval,
The change rate sends out termination order when increasing；
Disconnecting device connects the processing circuit, and the resonant mode is cut off in the state of receiving the termination order
The electric energy of radio energy transmission system transmits.
Preferably, when the resonance type wireless electric energy transmission system carries out electric energy transmission, the electric current I of power end1For
Wherein, U is voltage, and ω is resonance angular frequency, mutual inductances of the M between two coils, RpFor primary side equivalent internal resistance, RsFor
Secondary side equivalent internal resistance, RlFor equivalent load, when completing to charge, equivalent load RlBecome infinitely great, the electric current I of input terminal1Have one
A increased process.
Compared with prior art, the present invention has following advantageous effect：
1, circuit topological structure is relatively simple；
2, communication links are eliminated so that cost significantly reduces；
3, compared with previous circuit pair, this is simple in structure, easy to operate；
4, waveform variation is apparent, and detection reliability is high, and action is fast.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the structural schematic diagram of resonance type wireless electric energy transmission system；
State diagram when Fig. 2 is resonance type wireless electric energy transmission system charging complete；
Fig. 3 is the curent change figure of power end；
Fig. 4 is the structural schematic diagram of the present invention；
In figure：
Zs：Secondary loop total impedance；
Zf：Secondary side reflected umpedance；
Zeq:Inverter equivalent output impedance；
ω：Resonance angular frequency；
Lp:Primary side energy transmission line self-induction；
Ls:Secondary side energy transmission line self-induction；
M：Mutual inductance between two coils；
Cp:Primary impedance matching capacitance；
Cs：Secondary impedance matching capacitance；
Rp：Primary side equivalent internal resistance；
Rs：Secondary side equivalent internal resistance；
Rl：Equivalent load；
Ud：DC voltage；
Id：DC side electric current；
Ip：Inverter outlet side electric current.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection domain.
The overall structure figure of wireless charging system is illustrated in Fig. 1, typical wireless charging system is by DC power supply, high frequency
Inverter, coupling coil, impedance matching network, rectification circuit and system load composition.Direct current is obtained by high-frequency inverter
It is to reduce the volume of heat coil using the reason of high frequency to required high-frequency alternating current so that transmission.Meanwhile in order to
The efficiency of transmission of raising system, input side and outlet side are connected by coupled resonant circuit, complete the transmission of system power.
State diagram when Fig. 2 is system charging complete.In system charging process, load side resistance gradually increases.When being
Unite charging complete when, load side resistance levels off to infinity, can be considered open circuit.Observation input side electric current I at this time1Variation.
According to theory analysis, when resonance occurs for system, input side electric current I1For：
As load RLWhen becoming infinity, I1Can be the I obtained after emulating there are one increased process, Fig. 31Oscillogram,
It can be seen that when charging is complete, electric current I1It can be there are one transition.
A kind of resonance type wireless electric energy transmission provided by the invention is detached from detection method without traffic load, humorous by detecting
The electric current of the power end of formula of shaking radio energy transmission system, the change rate di/dt of electric current within the unit interval of the input terminal
Electric energy transmission is terminated when increase.
As shown in figure 4, the present invention also provides a kind of resonance type wireless electric energy transmission without traffic load be detached from detection system
System, including：
Current sensing means, is set to the input terminal of resonance type wireless electric energy transmission system, detects the input terminal in real time
Electric current.Current sensing means can be current sensor.
Processing circuit connects the current sensing means, calculates change rate di/ of the electric current detected within the unit interval
Dt sends out termination order when the change rate increases.
Disconnecting device connects the processing circuit, and the resonant mode is cut off in the state of receiving the termination order
The electric energy of radio energy transmission system transmits.Disconnecting device includes the switchgears such as all kinds of breakers.
One skilled in the art will appreciate that in addition to realizing system provided by the invention in a manner of pure computer readable program code
It, completely can be by the way that method and step be carried out programming in logic come so that the present invention provides and its other than each device, module, unit
System and its each device, module, unit with logic gate, switch, application-specific integrated circuit, programmable logic controller (PLC) and embedding
Enter the form of the controller that declines etc. to realize identical function.So system provided by the invention and its every device, module, list
Member is considered a kind of hardware component, and also may be used for realizing the device of various functions, module, unit to include in it
To be considered as the structure in hardware component；It can also will be considered as realizing the device of various functions, module, unit either real
The software module of existing method can be the structure in hardware component again.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase
Mutually combination.
Claims (4)
1. a kind of resonance type wireless electric energy transmission is detached from detection method without traffic load, which is characterized in that including：Detect resonance
The electric current of the power end of formula radio energy transmission system, it is whole when the change rate of electric current increases within the unit interval of the input terminal
Only electric energy transmits.
2. resonance type wireless electric energy transmission according to claim 1 is detached from detection method without traffic load, feature exists
In, when the resonance type wireless electric energy transmission system carries out electric energy transmission, the electric current I of power end1For
Wherein, U is voltage, and ω is resonance angular frequency, mutual inductances of the M between two coils, RpFor primary side equivalent internal resistance, RsFor secondary side
Equivalent internal resistance, RlFor equivalent load, when completing to charge, equivalent load RlBecome infinitely great, the electric current I of input terminal1There are one increase
Big process.
3. a kind of resonance type wireless electric energy transmission is detached from detecting system without traffic load, which is characterized in that including：
Current sensing means, is set to the input terminal of resonance type wireless electric energy transmission system, detects the electricity of the input terminal in real time
Stream；
Processing circuit connects the current sensing means, change rate of the electric current detected within the unit interval is calculated, described
Change rate sends out termination order when increasing；
Disconnecting device connects the processing circuit, and the resonance type wireless is cut off in the state of receiving the termination order
The electric energy of electric energy transmission system transmits.
4. resonance type wireless electric energy transmission according to claim 3 is detached from detecting system without traffic load, feature exists
In, when the resonance type wireless electric energy transmission system carries out electric energy transmission, the electric current I of power end1For
Wherein, U is voltage, and ω is resonance angular frequency, mutual inductances of the M between two coils, RpFor primary side equivalent internal resistance, RsFor secondary side
Equivalent internal resistance, RlFor equivalent load, when completing to charge, equivalent load RlBecome infinitely great, the electric current I of input terminal1There are one increase
Big process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711487086.5A CN108306422A (en) | 2017-12-29 | 2017-12-29 | The transmission of resonance type wireless electric energy is detached from detection method and system without traffic load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711487086.5A CN108306422A (en) | 2017-12-29 | 2017-12-29 | The transmission of resonance type wireless electric energy is detached from detection method and system without traffic load |
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| CN108306422A true CN108306422A (en) | 2018-07-20 |
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| CN201711487086.5A Pending CN108306422A (en) | 2017-12-29 | 2017-12-29 | The transmission of resonance type wireless electric energy is detached from detection method and system without traffic load |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617682A (en) * | 2015-02-05 | 2015-05-13 | 广西电网有限责任公司电力科学研究院 | Method for recognizing electric vehicle in multi-guide-rail wireless power supply mode |
| CN104868611A (en) * | 2015-05-25 | 2015-08-26 | 华南理工大学 | Resonant wireless electric energy transmission system based on double-E type power amplifier |
-
2017
- 2017-12-29 CN CN201711487086.5A patent/CN108306422A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617682A (en) * | 2015-02-05 | 2015-05-13 | 广西电网有限责任公司电力科学研究院 | Method for recognizing electric vehicle in multi-guide-rail wireless power supply mode |
| CN104868611A (en) * | 2015-05-25 | 2015-08-26 | 华南理工大学 | Resonant wireless electric energy transmission system based on double-E type power amplifier |
Non-Patent Citations (1)
| Title |
|---|
| 陈宇等: "电动车无线充电系统的空载保护与负载检测", 《2013年中国电机工程学会年会》 * |
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Application publication date: 20180720 |