CN108471172A - The coefficient of coup discrimination method of Universal wireless electric energy transmission system coupling mechanism - Google Patents
The coefficient of coup discrimination method of Universal wireless electric energy transmission system coupling mechanism Download PDFInfo
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- CN108471172A CN108471172A CN201810367946.XA CN201810367946A CN108471172A CN 108471172 A CN108471172 A CN 108471172A CN 201810367946 A CN201810367946 A CN 201810367946A CN 108471172 A CN108471172 A CN 108471172A
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- capacitance
- inductance
- coup
- coefficient
- coupling mechanism
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- 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
Abstract
The coefficient of coup discrimination method of Universal wireless electric energy transmission system coupling mechanism, belongs to wireless power transmission technical field.The present invention is to easily cause fault in order to which the coefficient of coup solved the problem of between radio energy transmission system transmitting terminal and receiving terminal cannot recognize in advance.It realizes the identification to the coefficient of coup using coefficient of coup identification receiving unit and coefficient of coup identification transmitter unit；The characteristics of by combining each component parameters in electric energy transmission, the coefficient of coup of coupling mechanism is obtained in advance, the working condition of system is enable to be determined in advance.Identification of the present invention for the coefficient of coup of radio energy transmission system.
Description
Technical field
The present invention relates to the coefficient of coup discrimination methods of Universal wireless electric energy transmission system coupling mechanism, belong to radio
It can transmission technique field.
Background technology
It is wireless that wireless power transmission technology is now widely used for electric vehicle, mobile phone wireless charging and industrial robot
The industries such as charging.Current wireless electric energy transmission technology faces an important technological problems, i.e. working state of system is not easy to obtain.System
Coupling mechanism receiving terminal is close to transmitting terminal when system work, and by intercoupling between coupling mechanism, load can obtain from power supply
Take power.The relative position between system coupling mechanism directly affects system transimission power and efficiency of transmission at this time, therefore obtains
Take the relative position between coupling mechanism that can quickly and conveniently realize system power control.
Relative position shows as the change in location in the three dimensions such as translation, rotation and overturning between coupling mechanism, usually
Related sensor is difficult to be utilized accurately to obtain the parameters such as its three-dimensional coordinate and rotation angle.It is learnt between coupling mechanism through research
Complicated relative position can be converted into the coefficient of coup and be analyzed, and the working condition of system can be determined by the coefficient of coup.
Current method is, a certain voltage at node, electric current and phase information calculate when being worked by detecting system
The coefficient of coup, this method obtain the coefficient of coup during system works, therefore cannot predefine the peace of system work
Quan Xing.If system is particularly easy to cause component to burn because of overcurrent under unloaded or overload working condition.
Invention content
The invention aims to the coefficients of coup solved between radio energy transmission system transmitting terminal and receiving terminal cannot
The problem of recognizing in advance, easily causing fault, provides a kind of coupling of Universal wireless electric energy transmission system coupling mechanism
Parameter identification method.
The coefficient of coup discrimination method of Universal wireless electric energy transmission system coupling mechanism of the present invention, the radio
Can Transmission system include inverter, primary side compensation network, primary side trap, main coupling mechanism, it is secondary in trap, it is secondary while compensate net
Network and rectification circuit, the coefficient of coup discrimination method is based on coefficient of coup identification receiving unit and coefficient of coup identification transmitting is single
Member is realized；
Inverter is mended for providing AC energy, the input terminal of the output end connection primary side compensation network of inverter, primary side
After repaying the output end connection primary side trap of network, it connect main coupling mechanism primary side emission lines jointly with another output end
The input terminal of circle, it is in parallel with main coupling mechanism primary side transmitting coil that the coefficient of coup recognizes receiving unit；Main coupling mechanism pair side connects
Take-up circle is in parallel with coefficient of coup identification transmitter unit, and main coupling mechanism pair is hindered in an output end auxiliary connection of receiving coil
After wave device, the output end connection of the input terminal with the common auxiliary connection side compensation network of another output end, secondary side compensation network is whole
The output end of the input terminal of current circuit, rectification circuit is loaded for connecting；
The primary side trap includes capacitance C31, capacitance C32And inductance L31, an output end of the primary side compensation network
Connect capacitance C31One end, capacitance C31Other end connection capacitance C32One end, capacitance C32The other end as primary side trap
Output end connect an input terminal of main coupling mechanism primary side transmitting coil；Inductance L31With capacitance C32It is in parallel；
The coefficient of coup identification receiving unit includes capacitance C41, capacitance C42, inductance L41, inductance L42And signal processing list
Member, capacitance C42With inductance L42It is in parallel with main coupling mechanism primary side transmitting coil after series connection, inductance L42With inductance L41Form primary side coupling
Close transformer, inductance L41With capacitance C41Parallel connection, capacitance C41It is in parallel with signal processing unit；
It includes high-frequency signal source U that the coefficient of coup, which recognizes transmitter unit,d, capacitance C61, capacitance C62, inductance L61And inductance L62, electricity
Feel L62With capacitance C62It is in parallel with main coupling mechanism pair side receiving coil after series connection, inductance L62With inductance L61The secondary side coupling of composition becomes
Depressor, inductance L61, capacitance C61With high-frequency signal source UdForming circuit；
The coefficient of coup discrimination method includes,
Make the high-frequency signal source UdWorking frequency ω meet：
Make capacitance C31Meet：
Wherein ωpFor the energy transmission working frequency of main coupling mechanism,
Make inductance L42With inductance L62Value it is equal；
The high-frequency signal source UdIt is expressed as：
Ud=ucos ω t,
U is high frequency ac signal amplitude in formula, and t is the time；
The voltage U being coupled to receive that signal processing unit passes through main coupling mechanism at this timeLFor：
J is imaginary number in formula, and k is the coefficient of coup of main coupling mechanism, LpFor the inductance of main coupling mechanism primary side transmitting coil,
LsFor the inductance of main coupling mechanism pair side receiving coil；
Then determine that the coefficient of coup of main coupling mechanism is：
Advantages of the present invention：The present invention is directed to the problem of coupling mechanism working condition is not easy to obtain in wireless power transmission,
In being transmitted in conjunction with electric energy the characteristics of each component parameters, the coefficient of coup of coupling mechanism is obtained in advance, enables the working condition of system
It is determined in advance.
The coefficient of coup discrimination method of the present invention has versatility, can adapt to the wireless power transmission of different compensation topologies
System；And the method for the present invention predefines the coefficient of coup under the premise of not activation system energy transmission, has good peace
Quan Xing.
Description of the drawings
Fig. 1 is a kind of corresponding functional block diagram of radio energy transmission system of the method for the present invention；
Fig. 2 is the electrical block diagram of primary side trap；
Fig. 3 is a kind of radio energy transmission system coupling principle schematic diagram in not actuated energy transmission；
Fig. 4 is the radio energy transmission system functional block diagram of series capacitance (S) type compensation network；
Fig. 5 is the radio energy transmission system functional block diagram of LC-LC type compensation networks；
Fig. 6 is the radio energy transmission system functional block diagram of LC-S type compensation networks；
Fig. 7 is the radio energy transmission system functional block diagram of LCC-LCC type compensation networks；
Fig. 8 is the radio energy transmission system functional block diagram of LCC-S type compensation networks；
Fig. 9 is the radio energy transmission system functional block diagram of LCC-LC type compensation networks.
Specific implementation mode
Description of specific embodiments of the present invention below in conjunction with the accompanying drawings：
In conjunction with shown in Fig. 1, the coefficient of coup of Universal wireless electric energy transmission system coupling mechanism of the present invention recognizes
Method, the radio energy transmission system include inverter 1, primary side compensation network 2, primary side trap 3, main coupling mechanism 5, pair
In trap 7, pair, compensation network 8 and rectification circuit 9, the coefficient of coup discrimination method are based on coefficient of coup identification and receive list
Member 4 and coefficient of coup identification transmitter unit 6 are realized；
Inverter 1 is for providing AC energy, the input terminal of the output end connection primary side compensation network 2 of inverter 1, primary side
After the output end connection primary side trap 3 of compensation network 2, it connect 5 primary side of main coupling mechanism jointly with another output end
The input terminal of transmitting coil, it is in parallel with 5 primary side transmitting coil of main coupling mechanism that the coefficient of coup recognizes receiving unit 4；Main coupling machine
The secondary side receiving coil of structure 5 is in parallel with coefficient of coup identification transmitter unit 6, an output of the secondary side receiving coil of main coupling mechanism 5
After holding auxiliary connection side trap 7, the input terminal with the common auxiliary connection side compensation network of another output end 8, secondary side compensation network 8
Output end connection rectification circuit 9 input terminal, the output end of rectification circuit 9 loads for connecting；
In conjunction with shown in Fig. 2, the primary side trap 3 includes capacitance C31, capacitance C32And inductance L31, the primary side compensation net
The output end connection capacitance C of network 231One end, capacitance C31Other end connection capacitance C32One end, capacitance C32It is another
End connects an input terminal of 5 primary side transmitting coil of main coupling mechanism as the output end of primary side trap 3；Inductance L31With capacitance
C32It is in parallel；
It is that trap, inverter, compensation network and rectification circuit in Fig. 1 are removed into rear remaining circuit shown in Fig. 3,
High frequency signal source UdSignal transmission direction be secondary side to primary side direction by main coupling mechanism 5.The coefficient of coup identification
Receiving unit 4 includes capacitance C41, capacitance C42, inductance L41, inductance L42And signal processing unit, capacitance C42With inductance L42After series connection
It is in parallel with 5 primary side transmitting coil of main coupling mechanism, inductance L42With inductance L41Form primary side coupling transformer, inductance L41With capacitance
C41Parallel connection, capacitance C41It is in parallel with signal processing unit；
It includes high-frequency signal source U that the coefficient of coup, which recognizes transmitter unit 6,d, capacitance C61, capacitance C62, inductance L61And inductance L62,
Inductance L62With capacitance C62It is in parallel with the secondary side receiving coil of main coupling mechanism 5 after series connection, inductance L62With inductance L61The secondary side coupling of composition
Transformer, inductance L61, capacitance C61With high-frequency signal source UdForming circuit；
The coefficient of coup discrimination method includes,
Make the high-frequency signal source UdWorking frequency ω meet：
Make capacitance C31Meet：
Wherein ωpFor the energy transmission working frequency of main coupling mechanism 5,
Make inductance L42With inductance L62Value it is equal；
The high-frequency signal source UdIt is expressed as：
Ud=ucos ω t,
U is high frequency ac signal amplitude in formula, and t is the time；
The voltage U being coupled to receive that signal processing unit passes through main coupling mechanism 5 at this timeLFor：
J is imaginary number in formula, and k is the coefficient of coup of main coupling mechanism 5, LpFor the electricity of 5 primary side transmitting coil of main coupling mechanism
Sense, LsFor the inductance of the secondary side receiving coil of main coupling mechanism 5；
Then determine that the coefficient of coup of main coupling mechanism 5 is：
It is appropriate to choose smaller inductance L when recognizing the coefficient of coup41And inductance L42Primary side coupling transformer is formed, it can be with
Higher signal voltage is obtained in 5 primary side of main coupling mechanism, facilitates detection.
Make the capacitance C41With capacitance C61Value it is equal, inductance L41With inductance L61Value it is equal.Wherein, capacitance C42With electricity
Hold C62Value can be unequal.
Make the capacitance C41, capacitance C42, inductance L41, inductance L42And capacitance C62By following relationship value：
In the disclosure, inverter 1 provides AC energy for system, it can be exported according to different working conditions different has
Valid value.Primary side compensation network 2 is idle in reduction system for compensating the perception that 5 primary side transmitting coil of main coupling mechanism is brought
Power；It is secondary while compensation network 8 be used to compensate main coupling mechanism 5 it is secondary while the perception brought of receiving coil, it is idle in reduction system
Power；Primary side compensation network 2 and secondary side compensation network 8 all respectively include the elements such as inductance, capacitance, common compensation network structure
Including series capacitance (S) type, shunt capacitance type, LCC types and LC type compensation networks.As shown in Fig. 4 to Fig. 9.
In conjunction with shown in Fig. 2, primary side trap 3 and secondary side trap 7 are LC antiresonant circuits, can make its resonance frequency
Rate corresponds to signal frequency used by system；Since trap resonant frequency is higher, it is operated in low frequency energy Transmission system
Shi Chengxian perception, therefore compensating electric capacity can be increased to compensate this partial inductance.Capacitance C31For compensating electric capacity, for compensating trap
Influence to energy transmission loop.
Rectification circuit 9 can be able to be DC load collectively as the load of energy transmission system, the load with load,
Including motor, battery and ohmic load.
In conjunction with shown in Fig. 3, the coefficient of coup recognizes transmitter unit 6 and generates in high frequency electrocardiography to energy transmission loop,
Inductance L62With inductance L61The secondary side coupling transformer of composition can complete the injection work of energy signal.Capacitance C61, capacitance C62Respectively
For compensating the inductance in corresponding circuit, capacitance C62Selection be considered as inductance possessed by main coupling mechanism coil.High-frequency signal
Source UdThe signal of generation transmits circuit through secondary side coupling transformer Implantation Energy, at this time due to the blocking effect of secondary side trap 7,
High-frequency signal will not enter secondary side compensation network 8, but pass through main coupling mechanism 5 and enter system primary side.
Coefficient of coup identification receiving unit 4 is for extracting signal caused by coefficient of coup identification transmitter unit 6 and carrying out
Processing, determines the coefficient of coup under current state.Wherein inductance L41With inductance L42For completing the extraction work of signal.Capacitance
C41With capacitance C42It is respectively intended to compensate the inductance in corresponding circuit, capacitance C42Selection be considered as main coupling mechanism coil and had
Inductance.Signal processing unit is used for detecting the amplitude of high-frequency signal；The coefficient of coup recognizes the high-frequency signal that transmitter unit 6 generates
Due to the blocking effect of primary side trap 3 after into system primary side, primary side compensation network 2 will not be entered, high-frequency signal is through primary side
Coupling transformer extracts signal processing unit from energy transmission loop and is analyzed.Signal processing unit can be used for believing in high frequency
Number source UdWorking frequency ω determine after, according to the voltage U receivedLCalculate the coefficient of coup for obtaining main coupling mechanism 5.
The disclosure is a kind of universal embodiment, and application scenarios include most wireless energy transfer system, such as
The wireless charging of electric vehicle, mobile phone wireless charging.
When system of the present invention is charged, coefficient of coup identification transmitter unit 6 can generate continuous high-frequency ac
Signal, after signal enters coefficient of coup identification receiving unit 4, its voltage value obtained, further obtains and works as by analysis
The coefficient of coup under preceding state, voltage value can change with the size of the coefficient of coup in determining system.
The course of work of the method for the present invention can be following procedure：
User starts total power switch, and system enters standby mode；
Load is set to enter charge position, the coefficient of coup recognizes transmitter unit 6 and generates high-frequency signal；
Coefficient of coup identification receiving unit 4 receives high-frequency signal voltage ULCarry out calculation process；
According to high-frequency signal voltage ULConversion obtains system coefficient of coup k under the state；
Coefficient of coup k is fed back into electric energy transmission system.
Claims (3)
1. a kind of coefficient of coup discrimination method of Universal wireless electric energy transmission system coupling mechanism, the wireless power transmission system
System includes inverter (1), primary side compensation network (2), primary side trap (3), main coupling mechanism (5), secondary side trap (7), pair
Side compensation network (8) and rectification circuit (9), the coefficient of coup discrimination method be based on the coefficient of coup identification receiving unit (4) and
The coefficient of coup recognizes transmitter unit (6) and realizes；It is characterized in that,
For inverter (1) for providing AC energy, the input terminal of the output end connection primary side compensation network (2) of inverter (1) is former
After the output end connection primary side trap (3) of side compensation network (2), it connect main coupling mechanism jointly with another output end
(5) input terminal of primary side transmitting coil, the coefficient of coup recognize receiving unit (4) and main coupling mechanism (5) primary side transmitting coil simultaneously
Connection；The secondary side receiving coil of main coupling mechanism (5) is in parallel with coefficient of coup identification transmitter unit (6), and the secondary side of main coupling mechanism (5) connects
After one output end auxiliary connection side trap (7) of take-up circle, with the common auxiliary connection side compensation network (8) of another output end
Input terminal, the input terminal of the output end connection rectification circuit (9) of secondary side compensation network (8), the output end of rectification circuit (9) are used for
Connection load；
The primary side trap (3) includes capacitance C31, capacitance C32And inductance L31, an output of the primary side compensation network (2)
End connection capacitance C31One end, capacitance C31Other end connection capacitance C32One end, capacitance C32The other end as primary side wave arrestment
The output end of device (3) connects an input terminal of main coupling mechanism (5) primary side transmitting coil；Inductance L31With capacitance C32It is in parallel；
The coefficient of coup identification receiving unit (4) includes capacitance C41, capacitance C42, inductance L41, inductance L42And signal processing list
Member, capacitance C42With inductance L42It is in parallel with main coupling mechanism (5) primary side transmitting coil after series connection, inductance L42With inductance L41Composition is former
Side coupling transformer, inductance L41With capacitance C41Parallel connection, capacitance C41It is in parallel with signal processing unit；
It includes high-frequency signal source U that the coefficient of coup, which recognizes transmitter unit (6),d, capacitance C61, capacitance C62, inductance L61And inductance L62, electricity
Feel L62With capacitance C62It is in parallel with the secondary side receiving coil of main coupling mechanism (5) after series connection, inductance L62With inductance L61The secondary side coupling of composition
Transformer, inductance L61, capacitance C61With high-frequency signal source UdForming circuit；
The coefficient of coup discrimination method includes,
Make the high-frequency signal source UdWorking frequency ω meet：
Make capacitance C31Meet：
Wherein ωpFor the energy transmission working frequency of main coupling mechanism (5),
Make inductance L42With inductance L62Value it is equal；
The high-frequency signal source UdIt is expressed as：
Ud=ucos ω t,
U is high frequency ac signal amplitude in formula, and t is the time；
The voltage U being coupled to receive that signal processing unit passes through main coupling mechanism (5) at this timeLFor：
J is imaginary number in formula, and k is the coefficient of coup of main coupling mechanism (5), LpFor the electricity of main coupling mechanism (5) primary side transmitting coil
Sense, LsFor the inductance of the secondary side receiving coil of main coupling mechanism (5)；
Then determine that the coefficient of coup of main coupling mechanism (5) is：
2. the coefficient of coup discrimination method of Universal wireless electric energy transmission system coupling mechanism according to claim 1,
It is characterized in that,
Make the capacitance C41With capacitance C61Value it is equal, inductance L41With inductance L61Value it is equal.
3. the coefficient of coup discrimination method of Universal wireless electric energy transmission system coupling mechanism according to claim 2,
It is characterized in that,
Make the capacitance C41, capacitance C42, inductance L41, inductance L42And capacitance C62By following relationship value：
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| CN113128158A (en) * | 2021-05-06 | 2021-07-16 | 湘潭大学 | Coupling coefficient identification method of wireless power transmission system |
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