CN108011454A - Switching device and control method based on multi-emitting resonance type wireless transmission system - Google Patents
Switching device and control method based on multi-emitting resonance type wireless transmission system Download PDFInfo
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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
- 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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- 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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
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Abstract
The present invention proposes a kind of switching device and control method based on multi-emitting resonance type wireless transmission system, and the switching device includes multi-emitting coil and switching switch, compensating electric capacity, control circuit；Wherein, current sensor is connected with modulate circuit in control circuit, modulate circuit is connected with A/D conversion circuits, A/D conversion circuits are connected with FPGA controller, FPGA controller is connected with level shifting circuit and drive circuit, drive circuit is connected with the switching device of full-bridge inverter, and level shifting circuit is connected with relay array.The control method, include switching criterion and control algolithm, by detecting the transmitting terminal electric current under different operating mode in control algolithm, and accurately exported according to switching criterion so that system is in the switching group control signal of optimal operation mode, realize power supply area adaptively to switch, solve the efficiency decrease problem caused by lateral shift between coil.
Description
Technical field
The present invention relates to wireless power transmission field, and in particular to a kind of switching based on multi-emitting resonance type wireless transmission system
Device and control method.
Background technology
In multi-emitting resonance type wireless transmission system, when receiving coil and transmitting coil are there are during lateral shift, it can lead to
The adaptive of excessive transmitting coil switches to improve the anti-offset resistance of system；However, existing method for handover control is according only to coupling
Switching criterion between syzygy number and the relation derivation of efficiency of transmission transmitting coil, but the engineering coefficient of coup in practice is online
Acquisition is difficult to realize；Therefore, the switching criterion for multi-emitting resonance type wireless transmission system and control method need to also be into one
Step research with it is perfect.
The content of the invention
In order to solve the above technical problem, the present invention provides a kind of switching based on multi-emitting resonance type wireless transmission system
Device and control method.
Technical proposal that the invention solves the above-mentioned problems is：A kind of switching based on multi-emitting resonance type wireless transmission system
Device, the switching device include multi-emitting coil and switching switch, compensating electric capacity, control circuit；Wherein, it is electric in control circuit
Flow sensor is connected with modulate circuit, and modulate circuit is connected with A/D conversion circuits, and A/D conversion circuits are connected with FPGA controller,
FPGA controller is connected with level shifting circuit and drive circuit, and drive circuit is connected with the switching device of full-bridge inverter, electricity
Flat conversion circuit is connected with relay array.
The above-mentioned switching device based on multi-emitting resonance type wireless transmission system, the multi-emitting coil and switching switch by
Seven relay switches are formed, wherein, switch S1, switch S2, switch S3As main switch, L is realizedA、LB、LC、LDFour lines
On and off between circle group, switchs S4, switch S5, switch S6, switch S7As auxiliary switch, different service areas are realized
The access of coil group needed for domain, to being applied in combination, it can be achieved that single region (I, II, III) and dual area (I for seven relay switches
+ II, II+III) switching of five kinds of power supply areas between.
The above-mentioned switching device based on multi-emitting resonance type wireless transmission system, the transmitting terminal compensating electric capacity, using one
Two capacitance parallel forms of a relay switch, so that the circuit before and after system switching can realize rational capacitance compensation,
And can guarantee that there is capacitance work when circuit switches over all the time, capacitance expression formula is：
Wherein C1For the compensating electric capacity capacity of dual area power supply area, C1With C2The sum of supplied for single region
The compensating electric capacity capacity in electric region, L are a multiturn hexagon self-induction of loop, and ω is system work angular frequency.
The above-mentioned control method based on multi-emitting resonance type wireless transmission system, the control method include switching criterion
And control algolithm, switching criterion are applied to the selection of optimal operation mode under coil offset, are embodied in, when dual area works
The primary current I of modep2Less than the primary current I of single regional work modep10.7 times when, at this time dual area work transmission
Efficiency will be greater than the efficiency of transmission of single regional work, should switch to dual area operation mode, if there is Ip2More than or equal to 0.7 times
Ip1, then single regional work mode is switched to.
The above-mentioned control method based on multi-emitting resonance type wireless transmission system, the switching criterion in the control method,
The Rule of judgment of optimal operation mode under coil offset is derived according to following steps：
Step 1, the primary current and secondary current expression formula of single region and dual area are built according to KVL formula：
Step 2, structure efficiency and primary current expression formula, and the efficiency when dual area works is more than single regional work
When efficiency, then have：
Step 3, by primary current formula and formulaSubstitute into inequality, obtain dual area efficiency and be higher than
The expression formula of single area efficiency：
Wherein, η1, Ip1Respectively single area efficiency and primary current, Is1、Rp1、RLRespectively single region secondary current, line
Enclose internal resistance and load resistance value, Lp2For single region self-induction of loop, RRXFor secondary all-in resistance, Rp1=7R, Lp1=7L, η2, Ip2Respectively
Dual area efficiency and primary current, Is2、Rp2Respectively dual area side electric current and Coil resistance, Lp2For dual area self-induction of loop, Rp2
=10R, Lp2=10L.
The above-mentioned control method based on multi-emitting resonance type wireless transmission system, the control algolithm in the control method,
It is divided into single region detection and dual area detection, comprises the following steps：
Step 1, system are switched to operation mode I, II, III respectively, compare the original of three kinds of operation modes in single region at this time
Side electric current, draws the operation mode of minimum primary current, removes an operation mode of primary current maximum, remaining Liang Gedan areas
Domain operation mode forms the dual area operation mode to be switched；
Step 2, detection form the minimum primary current of the primary current and operation mode in single region of dual area, and
According to switching criterion, optimal operation mode under coil offset is judged, output is so that system is in the switching group of optimal operation mode
Control signal.
The invention devises a kind of switching device based on multi-emitting resonance type wireless transmission system, makes it be
System can carry out the switching of operation mode, and theory deduction has gone out a kind of multi-emitting resonance type wireless transmission system and has been in laterally partially
Switching criterion and control algolithm under moving, which can effectively reduce on-off times in handoff procedure, and foundation is cut
Criterion is changed accurately to export so that system is in the switching group control signal of optimal operation mode.
Brief description of the drawings
Fig. 1 is the system and device circuit diagram of the present invention；
Fig. 2 is the loop construction schematic diagram of the present invention；
Fig. 3 is the operation mode schematic diagram of the multi-emitting coil of the present invention；
Fig. 4 is the system and device schematic equivalent circuit of the present invention；
Fig. 5 is the control algolithm flow diagram of the present invention；
Fig. 6 is operation result schematic diagram of the present invention；
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1, be a kind of multi-emitting resonance type wireless transmission system device circuit figure, including direct voltage source, filter
Ripple capacitance, inverter, transmitting terminal compensating electric capacity, transmitting coil and receiving coil, transmitting coil switching switch, receive end compensating electricity
Appearance, rectifier, load, control circuit；Wherein switching device includes multi-emitting coil and switching switch, compensating electric capacity, control electricity
Road, current sensor is connected with modulate circuit in the control circuit, and modulate circuit is connected with A/D conversion circuits, A/D conversion electricity
Road is connected with FPGA controller, and FPGA controller is connected with level shifting circuit and drive circuit, drive circuit and full-bridge inverting
The switching device of device is connected, and level shifting circuit is connected with relay array.
Inverter carries the full-bridge inverter of reverse fly-wheel diode for switching device both ends.
Coil is by transmitting coil LpWith receiving coil LsComposition, transmitting terminal is by transmitting coil LpWith two electricity of the switch of transmitting terminal one
Hold the compensating electric capacity C of parallel form1、C2Form, receiving terminal is by receiving coil LsWith receiving terminal compensating electric capacity CsIt is in series.
Rectifier is diode bridge rectification.
As shown in Fig. 2, the transmitting end-coil of multi-emitting resonance type wireless transmission system is divided into five kinds of powering modes, power supply
Region I, power supply area II and power supply area III are single block supply pattern, and every kind of power supply area is by 7 hexagonal spiral circles
Composition；Power supply area I+II, power supply area II+III are dual area powering mode, and every kind of power supply area is spiral by 10 hexagons
Coil forms, each hexagon it is equal in magnitude, and be followed successively by and be connected in series between each hexagon coil, shown in table 1 specific
Composition and the subordinate relation with five power supply areas.
Table 1
| Power supply area | Composition | Coil is grouped | Composition |
| Ⅰ | LA LB LE | LA | L1 L2 L3 |
| Ⅱ | LB LC LE | LB | L4 L5 L6 |
| Ⅲ | LC LD LE | LC | L7 L9 L11 |
| Ⅰ+Ⅱ | LA LB LC LE | LD | L10 L12 L13 |
| Ⅱ+Ⅲ | LB LC LD LE | LE | L8 |
Multi-emitting coil and switching switch in switching device are made of seven relay switches, wherein, switch S1, switch
S2, switch S3As main switch, L is realizedA、LB、LC、LDOn and off between four coil groups, switchs S4, switch S5, open
Close S6, switch S7As auxiliary switch, the access of coil group needed for different power supply areas is realized, to seven relay switches
It is applied in combination, it is possible to achieve the switching of five kinds of power supply areas between single region (I, II, III) and dual area (I+II, II+III).
Transmitting terminal compensating electric capacity in switching device, using two capacitance parallel forms of a relay switch, so that
The front and rear circuit of system switching can realize rational capacitance compensation, and can guarantee that there is capacitance work when circuit switches over all the time
Make, capacitance expression formula is：
Wherein C1For the compensating electric capacity capacity of dual area power supply area, C1With C2The sum of for single region
The compensating electric capacity capacity of power supply area, L are a multiturn hexagon self-induction of loop, and ω is system work angular frequency.
As described in Figure 3, it is five kinds of operation modes of transmitting coil.Wherein, three operation modes in single region：
(1) closure switch S1、S6And S8, i.e. operation mode I works；(2) closure switch S2、S4、S7And S8, i.e. operation mode II works；
(3) closure switch S3、S5And S8；Two operation modes of dual area：(1) closure switch S1、S2And S7, i.e. I+II work of operation mode
Make；(2) closure switch S2、S3And S4, i.e. the work of operation mode II+III；Transmitting coil operation mode and switching group are shown in table 2
Composition.
Table 2
As shown in figure 4, be multi-emitting resonance type wireless transmission system equivalent circuit, wherein, i=1, the single region of expression (I,
IIth, III) operation mode；I=2, represents dual area (I+II, II+III) operation mode, DT-RHang down for receiving coil and transmitting coil
Straight distance, due to system structure feature, receiving terminal only exists the change of transversal displacement, therefore Ls、RsWith RL、DT-RSingle region with
Dual area is all identical when working.
The primary current and secondary current expression formula of single region and dual area are built according to KVL formula：
Build efficiency and primary current expression formula, and the effect when efficiency when dual area work is more than list regional work
Rate, then have：
By primary current formula and formulaSubstitute into inequality, obtain dual area efficiency and be higher than single region effect
The expression formula of rate：
Wherein, η1, Ip1Respectively single area efficiency and primary current, Is1、Rp1、RLRespectively single region secondary current, line
Enclose internal resistance and load resistance value, Lp2For single region self-induction of loop, RRXFor secondary all-in resistance, Rp1=7R, Lp1=7L, η2, Ip2Respectively
Dual area efficiency and primary current, Is2、Rp2Respectively dual area side electric current and Coil resistance, Lp2For dual area self-induction of loop, Rp2
=10R, Lp2=10L.
Thus, it can derive corresponding switching criterion, be embodied in, as the primary current I of dual area operation modep2It is small
In the primary current I of single regional work modep10.7 times when, at this time dual area work efficiency of transmission will be greater than single region work
The efficiency of transmission of work, should switch to dual area operation mode, if there is Ip2More than or equal to 0.7 times Ip1, then single region is switched to
Operation mode.
As shown in figure 5, be the control algolithm flow diagram of multi-emitting resonance type wireless transmission system, including following step
Suddenly：
Step 1, three kinds of single regional work mode are switched to by multi-emitting coil respectively, and are detected by current sensor
Primary current size；
Step 2, removes an operation mode of primary current maximum, and remaining two single regional work mode forms institute
The dual area operation mode to be switched；
Multi-emitting coil, is switched to required dual area operation mode by step 3, and detects primary current size；
Step 4, by the minimum primary current of the primary current of dual area operation mode and single regional work mode according to cutting
Criterion is changed to be judged；
Step 5, output is so that system is in the relay switch group control signal of optimal operation mode.
Switching device and control method proposed by the present invention based on multi-emitting resonance type wireless transmission system, in experiment sample
Pass through verification, experiment parameter on machine：DC power supply is 25V, system operating frequency 85kHz, transmission range 10cm, loads and is
23 Ω, secondary compensating electric capacity are 8nf, and secondary self-induction is 447uH, and secondary coil internal resistance is 1.3 Ω, primary side list region and dual area
Self-induction is respectively 447uH, 624uH, and primary side list region and dual area compensating electric capacity are respectively 8nf, 5.7nf, primary side list region with
Dual area Coil resistance is respectively 1.3 Ω, 1.8 Ω.
Shown in Fig. 6, there are during the offset distance of 7.2cm between transmitting coil and receiving coil, figure (a), (b), (c) are
The system inverter output voltage u under operation mode I, operation mode II, operation mode I+II respectivelycWith output current ip's
Waveform, it can be seen that the primary current of operation mode I is about 1.53A at this time, and the primary current of operation mode II is about 1.73A,
And the efficiency of operation mode I is 76.38%, the efficiency 75.06% of operation mode II；If being switched to the work of operation mode I+II,
Primary current is about 0.966A, I at this timep2/Ip1About 0.631, and the efficiency of operation mode I+II is 77.28%, therefore 7.2cm
Offset distance when, be switched to operation mode I+II.Switching control strategy i.e. incorporated in the present invention, and switched accordingly,
Efficiency of transmission of the system under coil offset will be improved.
Claims (6)
1. a kind of switching device based on multi-emitting resonance type wireless transmission system, it is characterised in that the switching device includes
Multi-emitting coil and switching switch, compensating electric capacity, control circuit, current sensor is connected with modulate circuit in control circuit, adjusts
Reason circuit is connected with A/D conversion circuits, and A/D conversion circuits are connected with FPGA controller, FPGA controller and level shifting circuit
It is connected with drive circuit, drive circuit is connected with the switching device of full-bridge inverter, level shifting circuit and relay array phase
Even.
A kind of 2. switching device as claimed in claim 1 based on multi-emitting resonance type wireless transmission system, it is characterised in that
The multi-emitting coil and switching switch are made of seven relay switches, wherein, switch S1, switch S2, switch S3Opened as master
Close, realize LA、LB、LC、LDOn and off between four coil groups, switchs S4, switch S5, switch S6, switch S7As auxiliary
Switch is helped, realizes the access of coil group needed for different power supply areas, seven relay switches are applied in combination, it is possible to achieve
The switching of five kinds of power supply areas between single region (I, II, III) and dual area (I+II, II+III).
A kind of 3. switching device as claimed in claim 1 based on multi-emitting resonance type wireless transmission system, it is characterised in that
The transmitting terminal compensating electric capacity, using two capacitance parallel forms of a relay switch, so that the electricity that system switching is front and rear
Lu Junneng realizes rational capacitance compensation, and can guarantee that there is capacitance work when circuit switches over all the time, and capacitance expression formula is：
Wherein C1For the compensating electric capacity capacity of dual area power supply area, C1With C2The sum of for single block supply area
The compensating electric capacity capacity in domain, L are a multiturn hexagon self-induction of loop, and ω is system work angular frequency.
4. a kind of control method based on multi-emitting resonance type wireless transmission system, it is characterised in that the control method includes
Switching criterion and control algolithm, switching criterion are applied to the selection of optimal operation mode under coil offset, are embodied in, when
The primary current I of dual area operation modep2Less than the primary current I of single regional work modep10.7 times when, dual area at this time
The efficiency of transmission of work will be greater than the efficiency of transmission of single regional work, should switch to dual area operation mode, if there is Ip2It is more than
Or equal to 0.7 times Ip1, then single regional work mode is switched to.
A kind of 5. control method as claimed in claim 4 based on multi-emitting resonance type wireless transmission system, it is characterised in that
Switching criterion in the control method, the Rule of judgment of optimal operation mode under coil offset is derived according to following steps：
Step 1, the primary current and secondary current expression formula of single region and dual area are built according to KVL formula：
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When step 2, structure efficiency and primary current expression formula, and the efficiency when dual area work are more than list regional work
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Step 3, by primary current formula and formulaSubstitute into inequality, obtain dual area efficiency and be higher than single area
The expression formula of domain efficiency：
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Wherein η1, Ip1Respectively single area efficiency and primary current, Is1、Rp1、RLRespectively single region secondary current, Coil resistance
And load resistance value, Lp2For single region self-induction of loop, RRXFor secondary all-in resistance, Rp1=7R, Lp1=7L, η2, Ip2Respectively dual area
Efficiency and primary current, Is2、Rp2Respectively dual area side electric current and Coil resistance, Lp2For dual area self-induction of loop, Rp2=10R,
Lp2=10L.
A kind of 6. control method as claimed in claim 4 based on multi-emitting resonance type wireless transmission system, it is characterised in that
The control algolithm is divided into single region detection and dual area detection, comprises the following steps：
Step 1, system are switched to operation mode I, II, III respectively, compare the primary side electricity of three kinds of operation modes in single region at this time
Stream, draws the operation mode of minimum primary current, removes an operation mode of primary current maximum, remaining two single regions work
Make mode and form the dual area operation mode to be switched；
Step 2, detection forms dual area primary current and list region in operation mode minimum primary current, and according to
Switching criterion, judges optimal operation mode under coil offset, and output is so that system is in the switching group control of optimal operation mode
Signal.
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| CN110491649A (en) * | 2019-08-19 | 2019-11-22 | 南京理工大学 | Radio energy transmission system and its switching method based on restructural primary coil |
| CN110549878A (en) * | 2018-05-15 | 2019-12-10 | 哈尔滨工业大学 | Wireless power transmission adaptive frequency tracking method and system based on switching control |
| CN112994260A (en) * | 2021-02-09 | 2021-06-18 | 哈尔滨工业大学 | Strong-anti-deviation wireless power transmission system based on mode switching |
| CN113036940A (en) * | 2021-01-08 | 2021-06-25 | 南京理工大学 | Magnetic coupling system suitable for wireless power transmission between rocket and ground |
| CN113098093A (en) * | 2021-04-02 | 2021-07-09 | 湖南炬神电子有限公司 | Low-cost wireless coil expander circuit that fills |
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| CN109802496A (en) * | 2019-02-18 | 2019-05-24 | 兰州交通大学 | The topological movable type ICPT system of variable backoff with fault-tolerant switch |
| CN109802496B (en) * | 2019-02-18 | 2020-11-10 | 兰州交通大学 | Variable compensation topology mobile ICPT system with fault-tolerant switch |
| CN110491649A (en) * | 2019-08-19 | 2019-11-22 | 南京理工大学 | Radio energy transmission system and its switching method based on restructural primary coil |
| CN110491649B (en) * | 2019-08-19 | 2021-09-17 | 南京理工大学 | Wireless power transmission system based on reconfigurable primary coil and switching method thereof |
| CN113036940A (en) * | 2021-01-08 | 2021-06-25 | 南京理工大学 | Magnetic coupling system suitable for wireless power transmission between rocket and ground |
| CN112994260A (en) * | 2021-02-09 | 2021-06-18 | 哈尔滨工业大学 | Strong-anti-deviation wireless power transmission system based on mode switching |
| CN112994260B (en) * | 2021-02-09 | 2022-06-07 | 哈尔滨工业大学 | Strong-anti-deviation wireless power transmission system based on mode switching |
| CN113098093A (en) * | 2021-04-02 | 2021-07-09 | 湖南炬神电子有限公司 | Low-cost wireless coil expander circuit that fills |
| CN113937911A (en) * | 2021-10-22 | 2022-01-14 | 湘潭大学 | Dual-emission wireless power transmission device and control method thereof |
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