CN109687604A - One-to-many radio energy transmission system and its control method suitable for ordered load - Google Patents
One-to-many radio energy transmission system and its control method suitable for ordered load Download PDFInfo
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- CN109687604A CN109687604A CN201910159617.0A CN201910159617A CN109687604A CN 109687604 A CN109687604 A CN 109687604A CN 201910159617 A CN201910159617 A CN 201910159617A CN 109687604 A CN109687604 A CN 109687604A
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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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- 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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
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Abstract
The invention discloses the one-to-many radio energy transmission systems and its control method that are suitable for ordered load, belong to wireless power transmission technical field, including DC voltage source, with the sequentially connected DC voltage converter of DC voltage source and high-frequency inverter, one end of the high-frequency inverter ac output end several switches in parallel, described several switch several transmitting coils of connecting, the other end of the high-frequency inverter ac output end connects a LCL compensation network, the other end of second resonant inductance of the LCL compensation network is connect with several transmitting coils, several described transmitting coils are connect by electromagnetic coupling with several receiving coils, several described receiving coils and several loads connect.The present invention solves existing multi-load radio energy transmission system presence, and structure is complicated, at high cost, the low problem of system effectiveness.
Description
Technical field
The invention belongs to wireless power transmission technical field, it is related to the one-to-many wireless power transmission suitable for ordered load
System and its control method.
Background technique
Current radio energy transmission system can be divided into four kinds of one-to-one, one-to-many, many-one, multi-to-multi systems, wherein
One-to-one radio energy transmission system includes an inverter, a transmitting coil and a receiving end, when there are multiple receptions
When holding power demand, it is necessary to multiple inverters and transmitting terminal, so that system structure is complicated, flexibility is poor, makes a low multiple use,
Construction, operation, maintenance cost are high；There are two types of one-to-many radio energy transmission systems, and one kind includes an inverter, a circle
Or the big transmitting coil of rectangle and multiple small receiving coils, another kind include an inverter, multiple transmitting coils and multiple small connect
Take-up circle, all in the presence of transmission efficiency is low, electromagnetic radiation is serious, the uncontrollable problem of receiving end power receiving voltage.
Moreover, each transmitting coil independently possesses a set of compensation circuit in existing radio energy transmission system, so that
Structure is complicated for system, at high cost, and most systems can only realize topological functions, can not achieve the efficiency optimization of system.
Therefore, the present invention is in view of the above problems, propose a kind of one-to-many wireless power transmission suitable for ordered load
System and its control method.
Summary of the invention
It is an object of the invention to: it provides suitable for the one-to-many radio energy transmission system of ordered load and its control
Method, solving existing multi-load radio energy transmission system presence, structure is complicated, at high cost, the low problem of system effectiveness.
The technical solution adopted by the invention is as follows:
Suitable for the one-to-many radio energy transmission system of ordered load, including DC voltage source E, with DC voltage source E
Sequentially connected DC voltage converter VDCBWith high-frequency inverter VT, the high-frequency inverter VTOne end of ac output end is in parallel
Several switches Sn, wherein n >=1, several switches SnIt connects several transmitting coils, the high-frequency inverter VTExchange
The other end of output end connects a LCL compensation network, the second resonant inductance L of the LCL compensation networkPT2The other end with
The connection of several transmitting coils, several described transmitting coils are connect by electromagnetic coupling with several receiving coils, if described
Dry receiving coil and several loads RLnConnection, wherein n >=1.
Further, the LCL compensation network includes two concatenated first resonant inductance LPT1With the second resonant inductance
LPT2And the first resonant inductance LPT1With the second resonant inductance LPT2Between a resonant capacitance C in parallelPT, the resonance
Capacitor CPTThe other end and inverter VTOne end connection.
Further, the receiving coil and load RLBetween be also connected with hf rectifier VRTAnd DC voltage converter
VDC。
Further, one transmitting coil includes concatenated transmitting coil inductance LPn, wherein n >=1 and one
A transmitting coil compensating electric capacity CPn, wherein n >=1.
Further, one receiving coil includes concatenated receiving coil inductance LSn, wherein n >=1, and
One receiving coil compensating electric capacity CSn, wherein n >=1, the receiving coil inductance LSnWith transmitting coil inductance LPnMutual inductance.
The control method of one-to-many radio energy transmission system suitable for ordered load, including method of controlling switch and effect
Rate optimal control method；
The precondition of the method for controlling switch is to guarantee at least one switch in closed state, when stable state, is
Uniting, only one is closed the switch, and when transient state, there are two switches to be closed at for switching process, specifically includes the following steps:
Step 1.1: guaranteeing at least one switch in closed state, it is assumed that when original state, switch SnIn closure
State；
Step 1.2: judging whether there is load and increase or decrease；
Step 1.3: being increased or decreased if step 1.2 does not load, remain closed switch Sn, system is in stable state, opens
Close finishing switching；
Step 1.4: if step 1.2 has load to increase, closure switch Sn+1, system is in transient state, is then turned off switch
Sn, switching terminates；
Step 1.5: if step 1.2 has load to reduce, closure switch Sn-1, system is in transient state, is then turned off switch
Sn, switching terminates；
The efficiency optimization control method, specifically includes the following steps:
Step 2.1: successively increasing load R by the 1st to n-th of transmitting coil sequenceL1、RL2、……、RLn, determine real
The number of border load, the i.e. value of n；
Step 2.2: transmitting coil inductance L in measuring systemP1、LP2、……、LPnWith transmitting coil compensating electric capacity CP1、
CP2、……、CPnThe voltage U at both endsRP1、URP2、……、URPnAnd DC voltage converter VDCBOutput voltage UDC；
Step 2.3: calculating high-frequency inverter VTOutput voltage UPT；
Step 2.4: computational load RL1、RL2、……、RLnThe active-power P of absorptionLeq1、PLeq2、……、PLeqn；
Step 2.5: calculating system effectiveness of sening as an envoy to Russian Market and reach highest DC voltage converter VDCBSense
Answer voltage UDCopt；
Step 2.6: setting DC voltage converter VDCBOutput voltage be UDCopt, to make radio energy transmission system
Efficiency optimization to peak.
Further, in the step 2.3, high-frequency inverter V is calculated according to formula (1)TOutput voltage UPT, the public affairs
Formula (1) are as follows:
Further, in the step 2.4, according to formula (2) computational load RL1、RL2、……、RLnThe wattful power of absorption
Rate PLeq1、PLeq2、……、PLeqn, the formula (2) are as follows:
Wherein, PLeqiTo load RLiThe active power of absorption, Re [] are to take real, UPRiFor transmitting terminal voltage, table
It is U up to formulaPRi=UPi+IPiRPi, UPiFor LPiAnd CPiOn the sum of voltage, IPiTo pass through LPiElectric current, MiFor i-th of emission lines
Enclose inductance LPiWith i-th of receiving coil inductance LSiMutual inductance value, Mi=M, RPiFor the internal resistance of i-th of transmitting coil, RPi=RP,
RSiFor the internal resistance of i-th of receiving coil, RSi=RS, ω is system resonance angular frequency:
Wherein, CPiFor i-th of transmitting coil compensating electric capacity, CSiFor i-th of receiving coil compensating electric capacity.
Further, in the step 2.5, with Russian Market calculation formula (4):
Wherein,
Wherein, α is gain coefficient, reaches highest direct current by above-mentioned formula (4) and formula (5) system effectiveness that can must send as an envoy to
Voltage changer VDCBInduced voltage UDCopt。
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. being suitable for the one-to-many radio energy transmission system of ordered load, the shared LCL compensation of multiple transmitting coils
Network and high frequency electric source, simplify system topology, reduce costs；In closed-loop control, transmitting coil and receiving coil
Between without establish communication connection, save wireless telecom equipment, further reduce costs.
2. the working condition of each transmitting coil of the invention has individual switch control, pass through the state of control switch
It can control the working condition of transmitting coil, idle transmitting coil just stops working, and control is simple, and from electromagnetic coupling machine
The angle of structure, coupling mechanism be it is one-to-one, leakage inductance is reduced, thus the comprehensive electromagnetic radiation for reducing system.
3. being suitable for the control method of the one-to-many radio energy transmission system of ordered load, pass through system modelling and control
Algorithm combines, and realizes switch control and efficiency optimization, improves the efficiency of transmission of radio energy transmission system.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings, in which:
Fig. 1 is the circuit topology figure of the one-to-many radio energy transmission system suitable for ordered load；
Fig. 2 is the method for controlling switch suitable for the control method of the one-to-many radio energy transmission system of ordered load
Flow chart；
Fig. 3 is the efficiency-optimization control side suitable for the control method of the one-to-many radio energy transmission system of ordered load
The circuit topology figure of method.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention, i.e., described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is logical
The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
Suitable for the one-to-many radio energy transmission system and its control method of ordered load, solve existing multi-load without
Line electric energy transmission system is in the presence of structure is complicated, at high cost, the low problem of system effectiveness.
Suitable for the one-to-many radio energy transmission system of ordered load, including DC voltage source E, with DC voltage source E
Sequentially connected DC voltage converter VDCBWith high-frequency inverter VT, the high-frequency inverter VTOne end of ac output end is in parallel
Several switches Sn, wherein n >=1, several switches SnIt connects several transmitting coils, the high-frequency inverter VTExchange
The other end of output end connects a LCL compensation network, the second resonant inductance L of the LCL compensation networkPT2The other end with
The connection of several transmitting coils, several described transmitting coils are connect by electromagnetic coupling with several receiving coils, if described
Dry receiving coil and several loads RLnConnection, wherein n >=1.
The present invention shares a LCL compensation network and high frequency electric source by multiple transmitting coils, simplifies system topological knot
Structure reduces costs；In closed-loop control, without establishing communication connection between transmitting coil and receiving coil, save wireless
Communication equipment further reduces costs.
The control method of one-to-many radio energy transmission system suitable for ordered load, a pair suitable for ordered load
The control method of multi radio energy Transmission system, including method of controlling switch and efficiency optimization control method；
The precondition of the method for controlling switch is to guarantee at least one switch in closed state, when stable state, is
Uniting, only one is closed the switch, and when transient state, there are two switches to be closed at for switching process, specifically includes the following steps:
Step 1.1: guaranteeing at least one switch in closed state, it is assumed that when original state, switch SnIn closure
State；
Step 1.2: judging whether there is load and increase or decrease；
Step 1.3: being increased or decreased if step 1.2 does not load, remain closed switch Sn, system is in stable state, opens
Close finishing switching；
Step 1.4: if step 1.2 has load to increase, closure switch Sn+1, system is in transient state, is then turned off switch
Sn, switching terminates；
Step 1.5: if step 1.2 has load to reduce, closure switch Sn-1, system is in transient state, is then turned off switch
Sn, switching terminates；
The efficiency optimization control method, specifically includes the following steps:
Step 2.1: successively increasing load R by the 1st to n-th of transmitting coil sequenceL1、RL2、……、RLn, determine real
The number of border load, the i.e. value of n；
Step 2.2: transmitting coil inductance L in measuring systemP1、LP2、……、LPnWith transmitting coil compensating electric capacity CP1、
CP2、……、CPnThe voltage U at both endsRP1、URP2、……、URPnAnd DC voltage converter VDCBOutput voltage UDC；
Step 2.3: calculating high-frequency inverter VTOutput voltage UPT；
Step 2.4: computational load RL1、RL2、……、RLnThe active-power P of absorptionLeq1、PLeq2、……、PLeqn；
Step 2.5: calculating system effectiveness of sening as an envoy to Russian Market and reach highest DC voltage converter VDCBSense
Answer voltage UDCopt；
Step 2.6: setting DC voltage converter VDCBOutput voltage be UDCopt, to make radio energy transmission system
Efficiency optimization to peak.
The control method of one-to-many radio energy transmission system suitable for ordered load is calculated by system modelling and control
Method combines, and realizes switch control and efficiency optimization, improves the efficiency of transmission of radio energy transmission system.
Feature and performance of the invention are described in further detail below with reference to embodiment.
Embodiment one
The one-to-many radio energy transmission system suitable for ordered load that present pre-ferred embodiments provide, such as Fig. 1 institute
Show, it should be noted that most load number in the N expression system in attached drawing, that is, final transmitting terminal/receiving end
Quantity, the n in specification indicate load number present in system under a certain working condition, that is, some transmitting therein
End/receiving end, and be not specific to, 1≤n≤N, and the i in specification is also illustrated that and referred to.
Suitable for the one-to-many radio energy transmission system of ordered load, including DC voltage source E, with DC voltage source E
Sequentially connected DC voltage converter VDCBWith high-frequency inverter VT, the high-frequency inverter VTOne end of ac output end is in parallel
Several switches Sn, wherein n >=1, several switches SnIt connects several transmitting coils, the high-frequency inverter VTExchange
The other end of output end connects a LCL compensation network, the second resonant inductance L of the LCL compensation networkPT2The other end with
The connection of several transmitting coils, several described transmitting coils are connect by electromagnetic coupling with several receiving coils, if described
Dry receiving coil and several loads RLnConnection, wherein n >=1.
Further, the LCL compensation network includes two concatenated first resonant inductance LPT1With the second resonant inductance
LPT2And the first resonant inductance LPT1With the second resonant inductance LPT2Between a resonant capacitance C in parallelPT, the resonance
Capacitor CPTThe other end and inverter VTOne end connection.
Further, the receiving coil and load RLBetween be also connected with hf rectifier VRTAnd DC voltage converter
VDC。
Further, one transmitting coil includes concatenated transmitting coil inductance LPn, wherein n >=1 and one
A transmitting coil compensating electric capacity CPn, wherein n >=1.
Further, one receiving coil includes concatenated receiving coil inductance LSn, wherein n >=1, and
One receiving coil compensating electric capacity CSn, wherein n >=1, the receiving coil inductance LSnWith transmitting coil inductance LPnMutual inductance.
Working principle are as follows:
The DC voltage converter VDCBBy the output voltage U of DC voltage source EDCBIt is transformed to UDCAfter export it is inverse to high frequency
Become device VT, the high-frequency inverter VTBy UDCIt is transformed to high-frequency alternating current potential source, and is powered for LCL compensation network, when high frequency is handed over
The electric current I of galvanic electricityPTCirculate transmitting coil inductance LPnWhen, in transmitting coil inductance LPnSurrounding generates electromagnetic field of high frequency；Receiving coil
Inductance LSnUnder this high-frequency electromagnetic field action, induction generates high-frequency ac voltage, this high-frequency ac voltage is first through hf rectifier
VRTRectification, then through DC voltage converter VDCTransformation can be load RLnPower supply.
The present invention shares a LCL compensation network and high frequency electric source by multiple transmitting coils, simplifies system topological knot
Structure reduces costs；In closed-loop control, without establishing communication connection between transmitting coil and receiving coil, save wireless
Communication equipment further reduces costs, and the working condition of each transmitting coil of the invention has individual switch control, leads to
The state for crossing control switch can control the working condition of transmitting coil, can control transmitting coil by the state of control switch
Working condition, idle transmitting coil just stops working, and from the angle of electromagnetic coupling mechanisms, coupling mechanism is one-to-one
, leakage inductance is reduced, thus the comprehensive electromagnetic radiation for reducing system.
The control method of one-to-many radio energy transmission system suitable for ordered load, including method of controlling switch and effect
Rate optimal control method；
The precondition of the method for controlling switch is to guarantee at least one switch in closed state, when stable state, is
Uniting, only one is closed the switch, and when transient state, there are two switches to be closed at for switching process, as shown in Fig. 2, specifically including
Following steps:
Step 1.1: guaranteeing at least one switch in closed state, it is assumed that when original state, switch SnIn closure
State；
Step 1.2: judging whether there is load and increase or decrease；
Step 1.3: being increased or decreased if step 1.2 does not load, remain closed switch Sn, system is in stable state, opens
Close finishing switching；
Step 1.4: if step 1.2 has load to increase, closure switch Sn+1, system is in transient state, is then turned off switch
Sn, switching terminates；
Step 1.5: if step 1.2 has load to reduce, closure switch Sn-1, system is in transient state, is then turned off switch
Sn, switching terminates；
The efficiency optimization control method is illustrated in figure 3 circuit topology when efficiency optimization, specifically includes following step
It is rapid:
Step 2.1: successively increasing load R by the 1st to n-th of transmitting coil sequenceL1、RL2、……、RLn, determine real
The number of border load, the i.e. value of n；
Step 2.2: transmitting coil inductance L in measuring systemP1、LP2、……、LPnWith transmitting coil compensating electric capacity CP1、
CP2、……、CPnThe voltage U at both endsRP1、URP2、……、URPnAnd DC voltage converter VDCBOutput voltage UDC；
Step 2.3: calculating high-frequency inverter VTOutput voltage UPT；
Step 2.4: computational load RL1、RL2、……、RLnThe active-power P of absorptionLeq1、PLeq2、……、PLeqn；
Step 2.5: calculating system effectiveness of sening as an envoy to Russian Market and reach highest DC voltage converter VDCBSense
Answer voltage UDCopt；
Step 2.6: setting DC voltage converter VDCBOutput voltage be UDCopt, to make radio energy transmission system
Efficiency optimization to peak.
Further, in the step 2.3, high-frequency inverter V is calculated according to formula (1)TOutput voltage UPT, the public affairs
Formula (1) are as follows:
Further, in the step 2.4, according to formula (2) computational load RL1、RL2、……、RLnThe wattful power of absorption
Rate PLeq1、PLeq2、……、PLeqn, the formula (2) are as follows:
Wherein, PLeqiTo load RLiThe active power of absorption, Re [] are to take real, UPRiFor transmitting terminal voltage, table
It is U up to formulaPRi=UPi+IPiRPi, UPiFor LPiAnd CPiOn the sum of voltage, IPiTo pass through LPiElectric current, MiFor i-th of emission lines
Enclose inductance LPiWith i-th of receiving coil inductance LSiMutual inductance value, Mi=M, RPiFor the internal resistance of i-th of transmitting coil, RPi=RP,
RSiFor the internal resistance of i-th of receiving coil, RSi=RS, ω is system resonance angular frequency:
Wherein, CPiFor i-th of transmitting coil compensating electric capacity, CSiFor i-th of receiving coil compensating electric capacity.
Further, in the step 2.5, with Russian Market calculation formula (4):
Wherein,
Wherein, α is gain coefficient, reaches highest direct current by above-mentioned formula (4) and formula (5) system effectiveness that can must send as an envoy to
Voltage changer VDCBInduced voltage UDCopt。
The control method of one-to-many radio energy transmission system suitable for ordered load is calculated by system modelling and control
Method combines, and realizes switch control and efficiency optimization, improves the efficiency of transmission of radio energy transmission system.
The foregoing is merely illustrative of the preferred embodiments of the present invention, the protection scope being not intended to limit the invention, any
Those skilled in the art within the spirit and principles in the present invention made by any modifications, equivalent replacements, and improvements etc.,
It should all be included in the protection scope of the present invention.
Claims (9)
1. being suitable for the one-to-many radio energy transmission system of ordered load, including DC voltage source E, it is characterised in that: also wrap
It includes and the sequentially connected DC voltage converter V of DC voltage source EDCBWith high-frequency inverter VT, the high-frequency inverter VTExchange
One end of output end several switches S in paralleln, wherein n >=1, several switches SnIt connects several transmitting coils, it is described
High-frequency inverter VTThe other end of ac output end connects a LCL compensation network, the second resonance electricity of the LCL compensation network
Feel LPT2The other end connect with several transmitting coils, several described transmitting coils by electromagnetic coupling and several reception
Coil connection, several described receiving coils and several loads RLnConnection, wherein n >=1.
2. the one-to-many radio energy transmission system according to claim 1 suitable for ordered load, it is characterised in that: institute
Stating LCL compensation network includes two concatenated first resonant inductance LPT1With the second resonant inductance LPT2And first resonance
Inductance LPT1With the second resonant inductance LPT2Between a resonant capacitance C in parallelPT, the resonant capacitance CPTThe other end with it is inverse
Become device VTOne end of ac output end connects.
3. the one-to-many radio energy transmission system according to claim 1 suitable for ordered load, it is characterised in that: institute
State receiving coil and load RLBetween be also connected with hf rectifier VRTWith DC voltage converter VDC。
4. the one-to-many radio energy transmission system according to claim 1 suitable for ordered load, it is characterised in that: institute
Stating a transmitting coil includes concatenated transmitting coil inductance LPn, wherein n >=1 and a transmitting coil compensating electric capacity
CPn, wherein n >=1.
5. the one-to-many radio energy transmission system according to claim 4 suitable for ordered load, it is characterised in that: institute
Stating a receiving coil includes concatenated receiving coil inductance LSn, wherein n >=1 and a receiving coil compensating electric capacity
CSn, wherein n >=1, the receiving coil inductance LSnWith transmitting coil inductance LPnMutual inductance.
6. based on the one-to-many radio energy transmission system for being suitable for ordered load described in claim 1 to 5 any one
Control method, which is characterized in that including method of controlling switch and efficiency optimization control method；
The precondition of the method for controlling switch is to guarantee at least one switch in closed state, and when stable state, system is only
There is one to close the switch, when transient state, there are two switches to be closed at for switching process, specifically includes the following steps:
Step 1.1: guaranteeing at least one switch in closed state, it is assumed that when original state, switch SnIn closed state；
Step 1.2: judging whether there is load and increase or decrease；
Step 1.3: being increased or decreased if step 1.2 does not load, remain closed switch Sn, system is in stable state, switching
Terminate；
Step 1.4: if step 1.2 has load to increase, closure switch Sn+1, system is in transient state, is then turned off switch Sn, switch
Finishing switching；
Step 1.5: if step 1.2 has load to reduce, closure switch Sn-1, system is in transient state, is then turned off switch Sn, switch
Finishing switching；
The efficiency optimization control method, specifically includes the following steps:
Step 2.1: successively increasing load R by the 1st to n-th of transmitting coil sequenceL1、RL2、……、RLn, determine actual negative
The number of load, the i.e. value of n；
Step 2.2: transmitting coil inductance L in measuring systemP1、LP2、……、LPnWith transmitting coil compensating electric capacity CP1、CP2、……、
CPnThe voltage U at both endsRP1、URP2、……、URPnAnd DC voltage converter VDCBOutput voltage UDC；
Step 2.3: calculating high-frequency inverter VTOutput voltage UPT；
Step 2.4: computational load RL1、RL2、……、RLnThe active-power P of absorptionLeq1、PLeq2、……、PLeqn；
Step 2.5: calculating system effectiveness of sening as an envoy to Russian Market and reach highest DC voltage converter VDCBInduced electricity
Press UDCopt；
Step 2.6: setting DC voltage converter VDCBOutput voltage be UDCopt, to make the effect of radio energy transmission system
Rate is optimized to peak.
7. the control method of the one-to-many radio energy transmission system according to claim 6 suitable for ordered load,
It is characterized in that, in the step 2.3, high-frequency inverter V is calculated according to formula (1)TOutput voltage UPT, the formula (1) are as follows:
8. the control method of the one-to-many radio energy transmission system according to claim 6 suitable for ordered load,
It is characterized in that, in the step 2.4, according to formula (2) computational load RL1、RL2、……、RLnThe active-power P of absorptionLeq1、
PLeq2、……、PLeqn, the formula (2) are as follows:
Wherein, PLeqiTo load RLiThe active power of absorption, Re [] are to take real, UPRiFor transmitting terminal voltage, expression formula
For UPRi=UPi+IPiRPi, UPiFor LPiAnd CPiOn the sum of voltage, IPiTo pass through LPiElectric current, MiFor i-th of transmitting coil electricity
Feel LPiWith i-th of receiving coil inductance LSiMutual inductance value, Mi=M, RPiFor the internal resistance of i-th of transmitting coil, RPi=RP, RSiFor
The internal resistance of i-th of receiving coil, RSi=RS, ω is system resonance angular frequency:
Wherein, CPiFor i-th of transmitting coil compensating electric capacity, CSiFor i-th of receiving coil compensating electric capacity.
9. the control method of the one-to-many radio energy transmission system according to claim 6 suitable for ordered load,
It is characterized in that, in the step 2.5, with Russian Market calculation formula (4):
Wherein,
Wherein, α is gain coefficient, reaches highest DC voltage by above-mentioned formula (4) and formula (5) system effectiveness that can must send as an envoy to
Converter VDCBInduced voltage UDCopt。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910159617.0A CN109687604B (en) | 2019-03-04 | 2019-03-04 | One-to-many wireless power transmission system suitable for ordered loads and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910159617.0A CN109687604B (en) | 2019-03-04 | 2019-03-04 | One-to-many wireless power transmission system suitable for ordered loads and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109687604A true CN109687604A (en) | 2019-04-26 |
| CN109687604B CN109687604B (en) | 2020-12-01 |
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