CN105680577B - A kind of wide range of power is adjustable radio energy transmission system and its control method - Google Patents
A kind of wide range of power is adjustable radio energy transmission system and its control method Download PDFInfo
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Abstract
The invention discloses a kind of adjustable radio energy transmission system of wide range of power and its control method, the system includes dc source, high-frequency inversion unit, fundamental wave energy pathway, harmonic energy path, rectification filtering unit, load, primary-side-control unit and secondary control unit；The difference of system output power requirement according to needed for load, based on the power transfer characteristic difference of fundamental wave energy channel harmonic energy channel, by controlling the fundamental wave two-way switch S in fundamental wave energy channel1With the harmonic wave two-way switch S in harmonic energy passage2On-off mode, make system work in fundamental wave energy channel is independently-powered, harmonic energy passage is independently-powered, fundamental wave and harmonic energy channel parallel power supply Three models under, realize that power output wide scope is adjustable.Advantage：Fundamental wave energy pathway cooperates with harmonic energy path, not only increases the utilization rate of power supply energy, and on the basis of the control circuit of complexity is added without, realize power output wide scope adjustable function.
Description
Technical field
The present invention relates to a kind of radio energy transmission system and its control method, particularly a kind of adjustable nothing of wide range of power
Line electric energy transmission system and its control method.
Background technology
In recent years, deepening continuously with wireless power transmission technical know-how research, increasing team begin to join
This big family.Wireless power transmission originates from 19th-century latter stage, is proposed first by Ni Gula teslas, in view of its
The advantages such as possessed safe and convenient, accommodative ability of environment is strong, and can solve the application problem of some specific occasions, and
Into the sight of people, become the study hotspot of current power electronic applications.
Radio energy transmission system is broadly divided into electromagnetic induction manifold type, magnetic resonance coupling formula, three kinds of microwave radiation formula, its
In, electromagnetic induction manifold type electric energy transmission system is because its efficiency is higher, simple in construction be widely studied and apply.Electromagnetism sense
Manifold type radio energy transmission system is answered to produce high frequency magnetic field using high-frequency ac electric energy is passed through in primary side transmitting coil, secondary picks up
Line taking circle obtains electric energy by electromagnetic coupled mode from high frequency magnetic field, realizes primary side mechanism to the physical isolation of secondary mechanism.
At present electromagnetic induction manifold type radio energy transmission system all be using high-frequency inversion device by DC inverter into
High-frequency ac square wave, then by designing the high frequency sinusoidal fundamental wave in resonance compensation network selection high-frequency ac square wave, so as to produce
Raw high frequency magnetic field.But under the conditions of Di Liheli is met, any period signal can be launched into Fourier space, so
Abundant harmonic wave resource in high-frequency ac square wave caused by inversion be present, and face these harmonic waves, filter is usually taken in we
The mode removed goes solve them, and this undoubtedly reduces the utilization rate of power supply energy.
In terms of radio energy transmission system power, document《Radio energy transmission system energy models and its application》It is proposed
A kind of primary side energy injection type electromagnetic induction manifold type radio energy transmission system output power strategy, the control model
Based on conservation of energy principle, calculated in equivalent load theory with electromagnetic induction manifold type radio energy transmission system reflected umpedance
On the basis of, any electromagnetic induction coupling for compensating network topology is realized by the contrast to inverter output power and given reference quantity
Box-like radio energy transmission system output power.Document《Non-contact power phase shifting control system modelling is studied》Describe electricity
A kind of phase shifting control strategy of the contactlessly powered system of flow pattern, work(is transmitted by adjusting full-bridge inverter bridge arm direct pass time control
Rate.But in these power regulating methods, often to add the control circuit of complexity and configure respective algorithms, it is necessary to from primary side mechanism
Power Control is carried out, and loads and is connected in secondary mechanism, because electromagnetic induction manifold type radio energy transmission system is former and deputy
The physical isolation of side mechanism, this output power information required for causing secondary mechanism load are difficult to transmit in primary side mechanism.
And be all to carry out power adjusting using fundamental wave in these power regulating methods, go to examine without crossing the angle utilized from harmonic wave
Consider the idea of system power regulation.
The content of the invention
The invention aims to provide a kind of adjustable radio energy transmission system of wide range of power and its control method, solution
The problem of certainly output power information in the prior art required for secondary mechanism load is difficult to transmit in primary side mechanism, fully profit
With harmonic energy, by the Working mould for changing fundamental wave energy pathway harmonic energy pathway two-way radio energy Transmission system
Formula, realize the purpose of control system power output.
The object of the present invention is achieved like this：Radio energy transmission system includes：Dc source, high-frequency inversion unit,
Fundamental wave energy pathway, harmonic energy path, rectification filtering unit, load, primary-side-control unit and secondary control unit；Direct current
Source powers for high-frequency inversion unit, and primary-side-control unit is the controller of high-frequency inversion unit；The output end of high-frequency inversion unit
It is connected simultaneously with the input of the input harmonic energy pathway of fundamental wave energy pathway, the output end of fundamental wave energy pathway is harmonious
The output end of wave energy path is connected with two rectification filtering unit inputs respectively, the output end of rectification filtering unit and load
Connection, the feedback signal of load are connected with secondary control unit.
Described high-frequency inversion unit：From full bridge inverter, fundamental wave energy pathway connects with harmonic energy path in parallel
It is connected on the output end of high-frequency inversion unit.
Described fundamental wave energy pathway：By base of being connected after fundamental wave energy transmitting coil inductance in parallel fundamental wave primary compensation capacitor
Ripple primary side compensation inductance composition LCL resonance compensation structures, fundamental wave energy pick-up winding inductance are connected after fundamental wave secondary compensating electric capacity
A fundamental wave two-way switch of connecting again forms, and fundamental wave energy transmitting coil inductance uses loose coupling with fundamental wave energy pick-up winding inductance
Close magnetic structure and realize physical isolation；The wherein inductance value phase of fundamental wave energy transmitting coil inductance and fundamental wave primary side compensation inductance
Deng at system fundamental wave work angular frequency, fundamental wave energy transmitting coil inductance and fundamental wave primary compensation capacitor meet that resonance closes
System, fundamental wave energy pick-up winding inductance meet resonant relationship with fundamental wave secondary compensating electric capacity, ensure fundamental wave energy transmitting coil electricity
Constant current in sense.
Described harmonic energy path：It is humorous by being connected after harmonic energy transmitting coil inductance in parallel harmonic wave primary compensation capacitor
Ripple primary side compensation inductance composition LCL resonance compensation structures, harmonic energy pick-up winding inductance are connected after harmonic wave secondary compensating electric capacity
A harmonic wave two-way switch of connecting again forms, and harmonic energy transmitting coil inductance uses loose coupling with harmonic energy pick-up winding inductance
Close magnetic structure and realize physical isolation；The wherein inductance value phase of harmonic energy transmitting coil inductance and harmonic wave primary side compensation inductance
Deng, at system nth harmonic work angular frequency n ω, n=3,5,7,9 ... ..., harmonic energy transmitting coil inductance is former with harmonic wave
Side compensating electric capacity meets resonant relationship, and harmonic energy pick-up winding inductance meets resonant relationship with harmonic wave secondary compensating electric capacity, protects
Demonstrate,prove constant current on harmonic energy transmitting coil inductance.
Described rectification filtering unit：Including diode D11、D12、D13、D14Composition can not parallel filtering after control rectifying circuit
Electric capacity C1Fundamental wave current rectifying and wave filtering circuit is formed, is connected to the output end of fundamental wave energy pathway 3；Diode D21、D22、D23、D24Composition is not
Parallel filtering electric capacity C after controlled rectification circuit2Harmonic wave rectification filter circuit is formed, is connected to harmonic energy path output；So
Afterwards, fundamental wave current rectifying and wave filtering circuit forms rectification filtering unit after being connected with harmonic wave rectification filter circuit, is load supplying.
Described primary-side-control unit：It is made up of primary controller DSP23 and primary side drive circuit；Primary controller
DSP23 output end is connected with the input of primary side drive circuit, and the output end of primary side drive circuit is real to high-frequency inversion unit
Apply control.
Described secondary control unit：It is made up of power-sensing circuit, secondary controller DSP26 and secondary drive circuit；
The output end of power-sensing circuit is connected with secondary controller DSP26 input, secondary controller DSP26 output end and pair
The input connection of side drive circuit, the output end of secondary drive circuit are implemented to control to fundamental wave two-way switch and harmonic wave two-way switch
System.
A kind of control method of the described adjustable radio energy transmission system of power output is as follows：
(1) as fundamental wave two-way switch S1Open, harmonic wave two-way switch S2During disconnection, radio energy transmission system works in base
The independently-powered pattern of ripple channel energy, system output power P1；As fundamental wave two-way switch S1Disconnect, harmonic wave two-way switch S2Open
When logical, radio energy transmission system works in the independently-powered pattern of harmonic energy passage, system output power P2；When fundamental wave is double
To switch S1With harmonic wave two-way switch S2When opening simultaneously, radio energy transmission system works in fundamental wave energy channel and harmonic wave energy
Measure channel parallel powering mode, system output power P3；As fundamental wave two-way switch S1With harmonic wave two-way switch S2Simultaneously turn off
When, noenergy closed-circuit working in radio energy transmission system, system output power 0；
(2) difference that the system output power according to needed for load requires, by controlling fundamental wave two-way switch S1It is double with harmonic wave
To switch S2In cycle T, fundamental wave two-way switch S1Independent service time T1, harmonic wave two-way switch S2Independent service time T2, base
Ripple two-way switch S1With harmonic wave two-way switch S2Service time T simultaneously3And fundamental wave two-way switch S1With harmonic wave two-way switch S2Together
When turn-off time T0Length, carry out control system power output P=(P1*T1+P2*T2+P3*T3+0*T0)/T size, wherein 0≤
T0、T1、T2、T3≤ T, T0+T1+T2+T3=T, and P2<P1<P3, make 0~P of system output power3Continuously adjustabe in wide scope, with full
The power demand loaded enough；
(3) in view of the system efficiency of transmission under the independently-powered pattern of harmonic energy passage is independently-powered compared with fundamental wave channel energy
It is high during pattern, so the system is using system efficiency of transmission as reference frame, it is preferential to ensure the harmonic energy channels operation time, pass through
Fundamental wave two-way switch S1With harmonic wave two-way switch S2Collocation use, system output power is divided into 0~P2、P2~P3Two ranks
Section；If system output power is in 0~P2In section, make fundamental wave two-way switch S1It is off state all the time in cycle T, leads to
Cross control two-way switch S2The service time T in cycle T2With fundamental wave two-way switch S1With harmonic wave two-way switch S2When simultaneously turning off
Between T0Ratio, realize system output power in 0~P2Continuously adjustabe in section；If system output power is in P2~P3Section
It is interior, make two-way switch S first2Opening state is in all the time in cycle T, then by controlling fundamental wave two-way switch S1In cycle T
Interior service time T3Length, realize system output power in P2~P3Continuously adjustabe in section.
Beneficial effect, as a result of such scheme, it is low complicated with Power Regulation control circuit to solve power supply energy utilization rate
The problem of, reach raising power supply energy utilization rate of the invention and realized under the conditions of the control circuit of complexity is added without defeated
Go out the adjustable purpose of power wide scope.
Brief description of the drawings：
Fig. 1 is present system main circuit structure figure.
Fig. 2 is that present system power output adjusts schematic diagram.
Fig. 3 is present system power output simulation waveform.
In figure, 1, dc source；2nd, high-frequency inversion unit；3rd, fundamental wave energy pathway；4th, harmonic energy path；5th, rectification is filtered
Ripple unit；6th, load；7th, primary-side-control unit；8th, secondary control unit；9th, fundamental wave primary side compensation inductance；10th, fundamental wave primary side is mended
Repay electric capacity；11st, fundamental wave energy transmitting coil inductance；12nd, fundamental wave energy pick-up winding inductance；13rd, fundamental wave secondary compensating electric capacity；
14th, fundamental wave two-way switch；15th, harmonic wave primary side compensation inductance；16th, harmonic wave primary compensation capacitor；17th, harmonic energy transmitting coil electricity
Sense；18th, harmonic energy pick-up winding inductance；19th, harmonic wave secondary compensating electric capacity；20th, harmonic wave two-way switch；21st, fundamental wave rectification is filtered
Wave circuit；22nd, harmonic wave rectification filter circuit；23rd, primary controller DSP；24th, primary side drive circuit；25th, power-sensing circuit；
26th, secondary controller DSP；27th, secondary drive circuit
Embodiment
Radio energy transmission system includes：Dc source 1, high-frequency inversion unit 2, fundamental wave energy pathway 3, harmonic energy lead to
Road 4, rectification filtering unit 5, load 6, primary-side-control unit 7 and secondary control unit 8；Dc source 1 is high-frequency inversion unit 2
Power supply, primary-side-control unit 7 are the controller of high-frequency inversion unit 2；The output end of high-frequency inversion unit 2 simultaneously with fundamental wave energy
The input connection of the input harmonic energy pathway 4 of path 3, the output end harmonic energy pathway 4 of fundamental wave energy pathway 3
Output end be connected respectively with two inputs of rectification filtering unit 5, the output end of rectification filtering unit 5 be connected with load 6, negative
The feedback signal of load 6 is connected with secondary control unit 8；.
Described high-frequency inversion unit 2：From full bridge inverter, fundamental wave energy pathway 3 is in parallel with harmonic energy path 4
It is connected to the output end of high-frequency inversion unit 2.
Described fundamental wave energy pathway 3：After 11 fundamental wave primary compensation capacitor 10 in parallel of fundamental wave energy transmitting coil inductance
Fundamental wave primary side of connecting compensation inductance 9 forms LCL resonance compensation structures, and the series connection fundamental wave secondary of fundamental wave energy pick-up winding inductance 12 is mended
Repay a fundamental wave two-way switch 14 of connecting again after electric capacity 13 to form, fundamental wave energy transmitting coil inductance 11 and fundamental wave energy pickup leads
Circle inductance 12 realizes physical isolation using loose coupling magnetic structure；Wherein fundamental wave energy transmitting coil inductance 11 is mended with fundamental wave primary side
It is equal to repay the inductance value of inductance 9, at system fundamental wave work angular frequency, fundamental wave energy transmitting coil inductance 11 and fundamental wave primary side
Compensating electric capacity 10 meets resonant relationship, and fundamental wave energy pick-up winding inductance 12 meets that resonance closes with fundamental wave secondary compensating electric capacity 13
System, ensure constant current on fundamental wave energy transmitting coil inductance 11.
Described harmonic energy path 4：After 17 harmonic wave primary compensation capacitor 16 in parallel of harmonic energy transmitting coil inductance
Harmonic wave of connecting primary side compensation inductance 15 forms LCL resonance compensation structures, the series connection harmonic wave secondary of harmonic energy pick-up winding inductance 18
A harmonic wave two-way switch 20 of being connected again after compensating electric capacity 19 forms, and harmonic energy transmitting coil inductance 17 picks up with harmonic energy
Coil inductance 18 realizes physical isolation using loose coupling magnetic structure；Wherein harmonic energy transmitting coil inductance 17 and harmonic wave primary side
It is equal to compensate the inductance value of inductance 15, at system n (n=3,5,7,9 ... ...) subharmonic work angular frequency n ω, harmonic energy
Transmitting coil inductance 17 meets resonant relationship, harmonic energy pick-up winding inductance 18 and harmonic wave pair with harmonic wave primary compensation capacitor 16
Side compensating electric capacity 19 meets resonant relationship, ensures constant current on harmonic energy transmitting coil inductance 17.
Described rectification filtering unit 5：Including diode D11、D12、D13、D14Composition can not filter in parallel after control rectifying circuit
Ripple electric capacity C1Fundamental wave current rectifying and wave filtering circuit 21 is formed, is connected to the output end of fundamental wave energy pathway 3；Diode D21、D22、D23、D24Group
Into can not parallel filtering electric capacity C after control rectifying circuit2Harmonic wave rectification filter circuit 22 is formed, it is defeated to be connected to harmonic energy path 4
Go out end；Then, rectification filtering unit 5 is formed after fundamental wave current rectifying and wave filtering circuit 21 is connected with harmonic wave rectification filter circuit 22, is negative
Carry power supply.
Described primary-side-control unit 7：It is made up of primary controller DSP23 and primary side drive circuit 24；Primary controller
DSP23 output end is connected with the input of primary side drive circuit 24, and the output end of primary side drive circuit is to high-frequency inversion unit 2
Implement control.
Described secondary control unit 8：By power-sensing circuit 25, secondary controller DSP26 and secondary drive circuit 27
Composition；The output end of power-sensing circuit 25 is connected with secondary controller DSP26 input, and secondary controller DSP26's is defeated
Go out end to be connected with the input of secondary drive circuit 27, the output end of secondary drive circuit 27 is to fundamental wave two-way switch 14 and harmonic wave
Two-way switch 20 implements control.
A kind of control method of the described adjustable radio energy transmission system of power output is as follows：
(1) as fundamental wave two-way switch S1Open, harmonic wave two-way switch S2During disconnection, radio energy transmission system works in base
The independently-powered pattern of ripple channel energy, system output power P1；As fundamental wave two-way switch S1Disconnect, harmonic wave two-way switch S2Open
When logical, radio energy transmission system works in the independently-powered pattern of harmonic energy passage, system output power P2；When fundamental wave is double
To switch S1With harmonic wave two-way switch S2When opening simultaneously, radio energy transmission system works in fundamental wave energy channel and harmonic wave energy
Measure channel parallel powering mode, system output power P3；As fundamental wave two-way switch S1With harmonic wave two-way switch S2Simultaneously turn off
When, noenergy closed-circuit working in radio energy transmission system, system output power 0；
(2) difference that the system output power according to needed for load requires, by controlling fundamental wave two-way switch S1It is double with harmonic wave
To switch S2In cycle T, fundamental wave two-way switch S1Independent service time T1, harmonic wave two-way switch S2Independent service time T2, base
Ripple two-way switch S1With harmonic wave two-way switch S2Service time T simultaneously3And fundamental wave two-way switch S1With harmonic wave two-way switch S2Together
When turn-off time T0Length, carry out control system power output P=(P1*T1+P2*T2+P3*T3+0*T0)/T size, wherein 0≤
T0、T1、T2、T3≤ T, T0+T1+T2+T3=T, and P2<P1<P3, make 0~P of system output power3Continuously adjustabe in wide scope, with full
The power demand loaded enough；
(3) in view of the system efficiency of transmission under the independently-powered pattern of harmonic energy passage is independently-powered compared with fundamental wave channel energy
It is high during pattern, so the system is using system efficiency of transmission as reference frame, it is preferential to ensure the harmonic energy channels operation time, pass through
Fundamental wave two-way switch S1With harmonic wave two-way switch S2Collocation use, system output power is divided into 0~P2、P2~P3Two ranks
Section；If system output power is in 0~P2In section, make fundamental wave two-way switch S1It is off state all the time in cycle T, leads to
Cross control two-way switch S2The service time T in cycle T2With fundamental wave two-way switch S1With harmonic wave two-way switch S2When simultaneously turning off
Between T0Ratio, realize system output power in 0~P2Continuously adjustabe in section；If system output power is in P2~P3Section
It is interior, make two-way switch S first2Opening state is in all the time in cycle T, then by controlling fundamental wave two-way switch S1In cycle T
Interior service time T3Length, realize system output power in P2~P3Continuously adjustabe in section.
In order that the purpose of the present invention, the content of the invention and beneficial effect are clearer, below in conjunction with accompanying drawing to the present invention
It is described in further detail：
Embodiment 1：Fig. 1 show present system structural representation, and present system includes dc source, high-frequency inversion
Unit, fundamental wave energy pathway, harmonic energy path, rectification filtering unit, load, primary-side-control unit and secondary control unit.
Described dc source UinIt can be obtained by the rectified filtering of civil power, DC voltage also can be used directly and be powered.
Half-bridge, full-bridge or push-pull inverter may be selected in described high-frequency inversion unit, and the present invention uses four power
Switching tube G1-G4Form H bridge high-frequency inverter circuits.Fundamental wave energy pathway is connected to high-frequency inversion list with harmonic energy path in parallel
The output end of member.
Described fundamental wave energy pathway composition includes：Fundamental wave primary side compensation inductance La1With fundamental wave primary compensation capacitor CP1, its
Middle fundamental wave primary compensation capacitor CP1With fundamental wave energy transmitting coil inductance LP1Inductance L is compensated after parallel connection with fundamental wave primary side againa1String
Connection, form LCL resonance compensation networks, wherein La1、CP1And LP1Meet formula (1) relation, to ensure fundamental wave energy transmitting coil inductance
Upper constant current.Fundamental wave energy pick-up winding inductance LS1Fundamental wave secondary compensating electric capacity of connecting CS1Connect again afterwards a fundamental wave two-way switch
Form series compensation structure, its fundamental wave secondary compensating electric capacity CS1With fundamental wave energy pick-up winding inductance LS1Meet formula (2) relation.
Fundamental wave energy transmitting coil inductance realizes physical isolation with fundamental wave energy pick-up winding inductance using loose coupling magnetic structure.
Wherein ω is system high-frequency inverter circuit output square wave frequency.
Herein by taking triple-frequency harmonics as an example, its structure composition includes described harmonic energy path：Harmonic wave primary side compensates
Inductance La2Harmonic primary compensation capacitor CP2, wherein harmonic wave primary compensation capacitor CP2With harmonic energy transmitting coil inductance LP2And
Inductance L is compensated after connection with fundamental wave primary side againa2Series connection, form LCL resonance compensation networks, wherein La2、CP2And LP2Meet that formula (3) is closed
System, to ensure constant current on harmonic energy transmitting coil inductance.Harmonic energy pick-up winding inductance LS2Harmonic wave of connecting secondary compensation electricity
Hold CS2A fundamental wave two-way switch of connecting again afterwards forms series compensation structure, its harmonic wave secondary compensating electric capacity CS2With harmonic energy
Pick-up winding inductance LS2Meet formula (4) relation.Harmonic energy transmitting coil inductance is with harmonic energy pick-up winding inductance using pine
Coupled Magnetic Path structure realizes physical isolation.
Described rectification filtering unit is made up of fundamental wave current rectifying and wave filtering circuit harmonic current rectifying and wave filtering circuit, is specifically included：
Fast recovery diode D11-D14Add filter capacitor C after forming fundamental wave full bridge rectifier1Filtering, form fundamental wave current rectifying and wave filtering circuit；
Fast recovery diode D21-D24Add filter capacitor C after the harmonic wave full bridge rectifier of composition2Filtering, form harmonic wave rectification filtered electrical
Road；Finally, fundamental wave current rectifying and wave filtering circuit harmonic current rectifying and wave filtering circuit is composed in series rectification filtering unit.
Described primary-side-control unit is made up of primary controller and drive circuit, and wherein primary controller selects DSP；Drive
Dynamic circuit is made up of light-coupled isolation and power amplification two parts circuit.
Described secondary control unit is made up of power-sensing circuit, secondary controller and drive circuit, wherein secondary control
Device processed selects DSP；Power-sensing circuit is connected with system output, can detect the power output needed for system load；Driving electricity
It route light-coupled isolation and power amplification two parts circuit is formed.
Referring to Fig. 1, according to electric circuit knowledge, can obtain parameter in fundamental wave energy pathway has following relation：
US1=ω MIP1 (8)
UO1=1.2US1 (9)
Wherein, u0Square-wave voltage, U are exported for inversioninFor DC voltage, U1Fundamental wave electricity is exported for the inversion of fundamental wave energy pathway
It is pressed with valid value, IP1For current effective value on fundamental wave energy pathway fundamental wave energy transmitting coil inductance, US1Opened for fundamental wave energy pathway
Road voltage effective value, UO1For voltage after fundamental wave energy pathway rectifying and wave-filtering.
From formula (5), in u0All harmonic waves in, the voltage highest of triple-frequency harmonics, energy is maximum, thus the present invention with
Triple-frequency harmonics designs harmonic energy path parameters.According to circuit relevant knowledge, parameter in harmonic energy path can be obtained in Fig. 1
Relation：
US2=3 ω MIP2 (12)
UO2=1.2US2 (13)
Wherein, U2Fundamental voltage virtual value, I are exported for the inversion of harmonic energy pathP2Launch for harmonic energy path harmonic energy
Current effective value in coil inductance, US2For harmonic energy path open-circuit voltage virtual value, UO2For harmonic energy path rectifying and wave-filtering
Voltage afterwards.
By controlling fundamental wave two-way switch S1Harmonic two-way switch S2Turn on and off, realize fundamental wave energy pathway and
The access of harmonic energy path and cut out, so as to reach the purpose of control system power output.
As fundamental wave two-way switch S1Open, harmonic wave two-way switch S2During disconnection, only has fundamental wave energy in radio energy transmission system
Measure closed-circuit working, system output power P1For：
As fundamental wave two-way switch S1Disconnect, harmonic wave two-way switch S2When opening, only has harmonic wave energy in radio energy transmission system
Measure closed-circuit working, system output power P2For：
As fundamental wave two-way switch S1With harmonic wave two-way switch S2When opening simultaneously, fundamental wave energy in radio energy transmission system
Path and harmonic energy path cooperation, system output power P3For：
As fundamental wave two-way switch S1With harmonic wave two-way switch S2When simultaneously turning off, noenergy is led in radio energy transmission system
Road works, system output power 0.
The difference of system output power requirement according to needed for load, by controlling fundamental wave two-way switch S1With harmonic wave two-way opened
Close S2In cycle T, fundamental wave two-way switch S1Independent service time T1, harmonic wave two-way switch S2Independent service time T2, fundamental wave it is double
To switch S1With harmonic wave two-way switch S2Service time T simultaneously3And fundamental wave two-way switch S1With harmonic wave two-way switch S2Close simultaneously
Disconnected time T0Length, carry out control system power output P size, make continuously adjustabe in system output power wide scope, with full
The power demand loaded enough.Meet following relation in system output power P：
In view of the system efficiency of transmission under the independently-powered pattern of harmonic energy passage is compared with the independently-powered mould of fundamental wave channel energy
Shi Shigao, so the system is using system efficiency of transmission as reference frame, it is preferential to ensure the harmonic energy channels operation time, pass through base
Ripple two-way switch S1With harmonic wave two-way switch S2Collocation use, system output power is divided into 0~P2、P2~P3Two stages；
If system output power is in 0~P2In section, make fundamental wave two-way switch S1It is off state all the time in cycle T, passes through control
Harmonic wave two-way switch S processed2The service time T in cycle T2With fundamental wave two-way switch S1With harmonic wave two-way switch S2When simultaneously turning off
Between T0Ratio, so as to realize system output power in 0~P2Continuously adjustabe in section；If system output power is in P2~P3
In section, make harmonic wave two-way switch S first2Opening state is in all the time in cycle T, then by controlling fundamental wave two-way switch
S1The service time T in cycle T3Length, so as to realize system output power in P2~P3Continuously adjustabe in section.
Fig. 2 is that present system power output adjusts schematic diagram, within the cycle T second, passes through the S of fundamental wave two-way switch1With
Harmonic wave two-way switch S2Collocation use, control T1、T2、T3、T0Length change figure in power output size, it is same to be apparent from its
Equivalent output powers in cycle are changed, so as to realize that system output power can adjust.
Fig. 3 is present system power output simulation waveform, uses the Simulink modules in MATLAB simulation softwares
Build such as Fig. 1 analogous diagrams.In view of system is done work and is considered as power output in the unit interval, the present embodiment so that the cycle is 1 second as an example,
Such as Fig. 2 control fundamental wave two-way switch S1With harmonic wave two-way switch S2Open and turn off, obtain the system power output be at 1 second
The interior area that waveform is surrounded with X-axis as shown in Figure 3, by changing fundamental wave two-way switch S1With harmonic wave two-way switch S2It is open-minded
With shut-off combining form and time, the controllable adjustment of power output can be achieved.
Claims (8)
1. a kind of adjustable radio energy transmission system of wide range of power, it is characterized in that：The radio energy transmission system includes：Direct current
Power supply, high-frequency inversion unit, fundamental wave energy pathway, harmonic energy path, rectification filtering unit, load, primary-side-control unit and
Secondary control unit；Dc source is powered for high-frequency inversion unit, and primary-side-control unit is the controller of high-frequency inversion unit；It is high
The output end of frequency inversion unit is connected with the input of the input harmonic energy pathway of fundamental wave energy pathway simultaneously, fundamental wave energy
The output end for measuring the output end harmonic energy pathway of path is connected with two rectification filtering unit inputs respectively, rectifying and wave-filtering
The output end of unit is connected with load, and the feedback signal of load is connected with secondary control unit.
2. the adjustable radio energy transmission system of a kind of wide range of power according to claim 1, it is characterized in that：Described height
Frequency inversion unit selects full bridge inverter, and fundamental wave energy pathway is connected to high-frequency inversion unit with harmonic energy path in parallel
Output end.
3. the adjustable radio energy transmission system of a kind of wide range of power according to claim 1, it is characterized in that：Described base
Wave energy path is by fundamental wave primary side compensation inductive bank of being connected after fundamental wave energy transmitting coil inductance in parallel fundamental wave primary compensation capacitor
Into LCL resonance compensation structures, a fundamental wave of being connected again after fundamental wave energy pick-up winding inductance series connection fundamental wave secondary compensating electric capacity is double
Formed to switch, fundamental wave energy transmitting coil inductance realizes thing with fundamental wave energy pick-up winding inductance using loose coupling magnetic structure
Reason isolation；Wherein fundamental wave energy transmitting coil inductance is equal with the inductance value of fundamental wave primary side compensation inductance, is worked in system fundamental wave
At angular frequency, fundamental wave energy transmitting coil inductance meets resonant relationship, fundamental wave energy pickup leads with fundamental wave primary compensation capacitor
Circle inductance meets resonant relationship with fundamental wave secondary compensating electric capacity, ensures constant current on fundamental wave energy transmitting coil inductance.
4. the adjustable radio energy transmission system of a kind of wide range of power according to claim 1, it is characterized in that：Described is humorous
Wave energy path is by harmonic wave primary side compensation inductive bank of being connected after harmonic energy transmitting coil inductance in parallel harmonic wave primary compensation capacitor
Into LCL resonance compensation structures, a harmonic wave of being connected again after harmonic energy pick-up winding inductance series connection harmonic wave secondary compensating electric capacity is double
Formed to switch, harmonic energy transmitting coil inductance realizes thing with harmonic energy pick-up winding inductance using loose coupling magnetic structure
Reason isolation；Wherein harmonic energy transmitting coil inductance is equal with the inductance value of harmonic wave primary side compensation inductance, in system nth harmonic work
Make at angular frequency n ω, n=3,5,7,9 ... ..., harmonic energy transmitting coil inductance meets that resonance closes with harmonic wave primary compensation capacitor
System, harmonic energy pick-up winding inductance meet resonant relationship with harmonic wave secondary compensating electric capacity, ensure harmonic energy transmitting coil electricity
Constant current in sense.
5. the adjustable radio energy transmission system of a kind of wide range of power according to claim 1, it is characterized in that：Described is whole
Stream filter unit includes diode D11、D12、D13、D14Composition can not parallel filtering electric capacity C after control rectifying circuit1It is whole to form fundamental wave
Filter circuit is flowed, is connected to fundamental wave energy pathway output end；Diode D21、D22、D23、D24Composition can not be after control rectifying circuit simultaneously
Join filter capacitor C2Harmonic wave rectification filter circuit is formed, is connected to harmonic energy path output；Then, fundamental wave rectifying and wave-filtering electricity
Road forms rectification filtering unit after being connected with harmonic wave rectification filter circuit, is load supplying.
6. the adjustable radio energy transmission system of a kind of wide range of power according to claim 1, it is characterized in that：Described original
Side control unit is made up of primary controller DSP23 and primary side drive circuit；Primary controller DSP23 output end is driven with primary side
The input connection of dynamic circuit, the output end of primary side drive circuit are implemented to control to high-frequency inversion unit.
7. the adjustable radio energy transmission system of a kind of wide range of power according to claim 1, it is characterized in that：Described pair
Side control unit is made up of power-sensing circuit, secondary controller DSP26 and secondary drive circuit；The output of power-sensing circuit
End is connected with secondary controller DSP26 input, secondary controller DSP26 output end and the input of secondary drive circuit
Connection, the output end of secondary drive circuit are implemented to control to fundamental wave two-way switch and harmonic wave two-way switch.
8. implement a kind of control method of the adjustable radio energy transmission system of wide range of power described in claim 1, its feature
It is：
（1）As fundamental wave two-way switch S1Open, harmonic wave two-way switch S2During disconnection, radio energy transmission system works in fundamental wave and led to
The independently-powered pattern of road energy, system output power P1；As fundamental wave two-way switch S1Disconnect, harmonic wave two-way switch S2When opening,
Radio energy transmission system works in the independently-powered pattern of harmonic energy passage, system output power P2；When fundamental wave two-way opened
Close S1With harmonic wave two-way switch S2When opening simultaneously, radio energy transmission system works in fundamental wave energy channel and led to harmonic energy
Road parallel powering pattern, system output power P3；As fundamental wave two-way switch S1With harmonic wave two-way switch S2When simultaneously turning off, nothing
Noenergy closed-circuit working in line electric energy transmission system, system output power 0；
（2）The difference of system output power requirement according to needed for load, by controlling fundamental wave two-way switch S1With harmonic wave two-way switch
S2In cycle T, fundamental wave two-way switch S1Independent service time T1, harmonic wave two-way switch S2Independent service time T2, fundamental wave it is two-way
Switch S1With harmonic wave two-way switch S2Service time T simultaneously3And fundamental wave two-way switch S1With harmonic wave two-way switch S2Simultaneously turn off
Time T0Length, come control system power output P=（P1*T1+P2*T2+P3*T3+0*T0）/ T size, wherein 0≤T0、T1、
T2、T3≤ T, T0+T1+T2+T3=T, and P2<P1<P3, make 0 ~ P of system output power3Continuously adjustabe in wide scope, to meet to load
Power demand；
（3）In view of the system efficiency of transmission under the independently-powered pattern of harmonic energy passage is compared with the independently-powered pattern of fundamental wave channel energy
Shi Gao, so the system is using system efficiency of transmission as reference frame, it is preferential to ensure the harmonic energy channels operation time, pass through fundamental wave
Two-way switch S1With harmonic wave two-way switch S2Collocation use, system output power is divided into 0 ~ P2、P2 ~P3Two stages；If
System output power is in 0 ~ P2In section, make fundamental wave two-way switch S1It is off state all the time in cycle T, it is double by controlling
To switch S2The service time T in cycle T2With fundamental wave two-way switch S1With harmonic wave two-way switch S2Simultaneously turn off time T0Ratio
Example, realizes system output power in 0 ~ P2Continuously adjustabe in section；If system output power is in P2 ~P3In section, make first
Two-way switch S2Opening state is in all the time in cycle T, then by controlling fundamental wave two-way switch S1When being opened in cycle T
Between T3Length, realize system output power in P2 ~P3Continuously adjustabe in section.
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| CN107317401B (en) * | 2017-08-10 | 2019-09-17 | 易事特集团股份有限公司 | Anti- offset constant voltage output radio energy transmission system |
| CN107707036B (en) * | 2017-11-01 | 2019-08-06 | 中国矿业大学 | Two-channel wireless electric energy transmission system and its energy and signal synchronous transmission method |
| CN109802498B (en) * | 2019-02-22 | 2022-03-25 | 上海桁壹高科技有限公司 | Power supply system, method and device based on radio frequency electromagnetic wave energy collection |
| CN110707832B (en) | 2019-10-15 | 2021-10-29 | 浙江大学 | Wireless power transmission system with incomplete compensation |
| CN112039225B (en) * | 2020-09-25 | 2022-02-15 | 华中科技大学 | Power transmission method and device of bidirectional wireless power transmission system |
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