CN104682579B - Twin coil and around radio energy transmission system output distribution method - Google Patents
Twin coil and around radio energy transmission system output distribution method Download PDFInfo
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- CN104682579B CN104682579B CN201510130015.4A CN201510130015A CN104682579B CN 104682579 B CN104682579 B CN 104682579B CN 201510130015 A CN201510130015 A CN 201510130015A CN 104682579 B CN104682579 B CN 104682579B
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Abstract
A kind of twin coil and around radio energy transmission system and its output distribution method.System includes transmitting terminal and receiving terminal, and transmitting terminal composition is：DC source shunt chopper one and inverter two；Inverter one passes through compensating electric capacity one and power distribution electric capacity one is connected with transmit coil one, and inverter two-way overcompensation electric capacity two and power distribution electric capacity two are connected with transmit coil two；Transmit coil one is identical with transmit coil two and and is around on same magnetic core；Receiving terminal is sequentially connected in series receiving terminal compensating electric capacity, rectifier bridge and load and constitutes by receiving coil.Power distribution method step is：Calculate and configure power distribution electric capacity；Adjusted by controller and control gross output, two inverters proportionally distribute output.This system cost is low, and stability is high, and through-put power is high；And two inverter electrical isolation, increased redundancy, motility and the reliability of system；System only needs a DC source, and power regulating method is easy, and control mode is simple.
Description
Technical field
The present invention relates to wireless power transmission technical field, more particularly, to a kind of twin coil and around wireless power transmission system
System and its output distribution method.
Background technology
The electric power system of wireless power transmission technology application to track traffic can avoid existing contact net or the 3rd rail etc.
The potential safety hazard that bare exposed conductor contact, power supply of sliding bring, and there is not the drawbacks such as carbon deposit, frictional dissipation, have and safeguard into
This low, safe and reliable, high advantage of practicality.
The main composition of existing radio energy transmission system and work process are：Industrial-frequency alternating current becomes straight through rectification
Stream, after inverter, DC inverter becomes high-frequency alternating current, and high frequency alternating current injects primary coil, produces high-frequency alternating magnetic
?；Secondary coil induces induction electromotive force in the high frequency magnetic field that primary coil produces, and it is whole that this induction electromotive force passes through high frequency
Stream and DC chopped-wave etc. provide electric energy to load after adjusting circuit.
Itself there is problems that：Traditional inverter adopts single single-phase full-bridge inverter, due to being held by switching device
The restriction of amount, output current cannot meet high-power power transmission (carrying out wireless power transmission as powered to track traffic) and want
Ask so that being very limited using the popularization of the wireless power transmission technology of single inverter.In addition single inverter is once
Damage, system will quit work, and system redundancy is poor.
The scheme realizing the transmission of high-power wireless electric energy at present mainly has two kinds：One kind is to use cascaded multilevel inverter
Mode realize, another kind is to be realized using the mode of multi-inverter parallel.The former shortcoming is that have independent DC power supply
Concatenated multilevel inverter circuit in, needed for it, independent direct current sourc number is very big, and power device is more, if each DC source needs
Want controlled words, so that whole system is controlled complicated；The shortcoming of the latter is in multiple inverter parallel, because inverter is defeated
Go out the inconsistent generation leading to circulation of phase and amplitude of voltage, circulation can affect system stability, also make the control plan of system
Slightly become complexity etc..
Content of the invention
The first object of the present invention be provide a kind of twin coil and around radio energy transmission system, this system cost is low,
Stability is high, and through-put power is high；Two inverter electrical isolation, increased redundancy, motility and the reliability of system；And be
System only needs a DC source, and power regulating method is easy, and control mode is simple.
The present invention realizes its first goal of the invention and be employed technical scheme comprise that, a kind of twin coil and around radio energy pass
Defeated system, including transmitting terminal and receiving terminal, its structure is：
The concrete composition of described transmitting terminal is：DC source two ends shunt chopper one and inverter two；Inverter one according to
Secondary be connected with transmit coil one by compensating electric capacity one and power distribution electric capacity one, inverter two passes sequentially through compensating electric capacity two He
Power distribution electric capacity two is connected with transmit coil two；Transmit coil one is identical with transmit coil two and and is around in same magnetic core
On；
Described receiving terminal is sequentially connected in series receiving terminal compensating electric capacity, rectifier bridge and load and constitutes by receiving coil；
The control end of inverter one of described transmitting terminal is all connected with controller with the control end of inverter two.
Compared with prior art, the beneficial effect of present system is：
First, two transmit coils and around, under Same Efficieney demand, two inverters proportionally distribution power hence it is evident that
Reduce the capacity of inverter breaker in middle device and the thermal losses of switching device, reduce cost, improve the stability of system.Logical
Cross transmit coil and around effectively increasing the total current of transmit coil, thus increased the gross output of system.
2nd, two transmit coils and around, if certain send changer hinder for some reason cannot work removed, another conversion
Device can work on, and system is not stopped transport, and is only the reduction of output, and for releasing fault, maintenance or replacing changer carry
Supply the time, increased redundancy, motility and the reliability of system, be capable of modularity.
3rd, the regulation exporting general power in the present invention can change inverter output electricity by controller regulation phase shifting angle
The radian value of pressure is realizing.System only needs a DC source, when needing different output power, adjusts phase shift by controller
Angle is thus change the radian value of inverter output voltage to reach the continuous purpose changing output, power regulating method letter
Just, control mode is simple.
The second object of the present invention be provide a kind of using above-mentioned twin coil and around radio energy transmission system output
Power distribution method, the method can effectively distribute the output of two inverters, makes inverter output capacity constant in general power
On the premise of reasonable distribution, and export be all active power, be particularly well-suited to two inverter capacity not wait situation.
The present invention realizes its second goal of the invention and be employed technical scheme comprise that, a kind of using above-mentioned twin coil and around nothing
The output distribution method of line electric energy transmission system, its step is：
A, the output determining inverter two according to user's request are β times of output of inverter one, then send
The power distribution electric capacity one at end and the capacitance c of power distribution electric capacity twoe1And ce2It is respectively：WithWherein, ω is inverter work angular frequency, and M is the mutual inductance value between transmit coil one and transmit coil two；
B, according to the A power distribution electric capacity one that obtains of step and power distribution electric capacity two capacitance ce1And ce2Configure and fill
If after, controller passes through to adjust the radian value that phase shifting angle controls inverter one and inverter two output voltage, thus controlling always defeated
Go out power：When the gross output needing inverter is P, adjusting phase shifting angle makes inverter one and the output voltage of inverter two
Radian value is θL,Can get corresponding output P, wherein, M1For transmit coil
Mutual inductance value between one and receiving coil, the also mutual inductance value as between transmit coil two and receiving coil, V is DC source
Magnitude of voltage, rlResistance value for load；Now the output of inverter one and inverter two presses the pro rate that step A sets
Output.
In the inverter output power distribution method of the present invention, the principle of its power distribution compensating electric capacity parameter determination is：
As shown in figure 1, the mutual inductance setting between transmit coil one and transmit coil two and secondary coil is M1, transmit coil
Mutual inductance between one and transmit coil two is M, and the resistance value of load is rl, in terms of rectifier bridge end, its equivalent resistance isIt is will
The self-induction of transmit coil is fully compensated, and the compensating electric capacity one of transmitting terminal and the capacitance of compensating electric capacity two are respectivelyWithWherein ls1 and ls2 is respectively the inductance value of transmit coil one and transmit coil two.Not
Increase before power distribution compensates, inverter one and the equivalent impedance Z of inverter two1And Z2It is expressed as formula (1)
From (1) formula, it is all active power for making inverter export, need to increase power distribution electric capacity in transmitting terminal
(as shown in Figure 2), to compensate mutual inductance between two transmit coils, increasedd compensating electric capacity one and compensating electric capacity two are respectively ce1With
ce2, orderWithAfter increasing electric capacity, inverter one and the equivalent impedance Z ' of inverter two1With Z '2
It is respectively shown in formula (2)：
It is all active power for making inversion unit export, Z ' need to be made1With Z '2For purely resistive, meanwhile, if inverter two exports
Power is β times of inverter one output, because inverter output voltage fundamental wave virtual value is equal, so there being Re (Z '1)=β Re
(Z′2), wherein Re () represents treating excess syndrome portion, obtains formula (3)
Solve (3) and obtain formula (4)
So power distribution compensating electric capacity value is formula (5)
Now in transmitting terminal two inverter output power and be formula (6)
By formula (6) it can be seen that no matter what value β chooses, inverter gross output keeps constant, simultaneously can be according to not
Same β, effectively distributes the power output of two inverters.
Compared with prior art, the beneficial effect of the inventive method is：
First, the inverter output power distribution method of the present invention, by the numerical value of setting power distribution of compensation electric capacity
Simply directly the output of two inverters is allocated；On the premise of gross output is constant, inverter power
The ratio of distribution, according to user wish, does not have any restriction, is particularly well-suited to the situation that two inverter capacity do not wait.
2nd, the inverter output power distribution method of the present invention, the ingenious mutual inductance that make use of between parallel wound coil, using
The mutual inductance of capacitance compensation two coil with reduce interactional meanwhile, it is capable to the proportionally flexible corresponding inverter of reasonable disposition
Output, does not have the circulation problem between shunt chopper, and system stability is high.
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
Brief description
Fig. 1 is the electrical block diagram that the embodiment of the present invention does not configure power distribution compensating electric capacity.
Fig. 2 is the electrical block diagram of the embodiment of the present invention.
Fig. 3 is the output voltage waveforms of two inverters of the embodiment of the present invention.
In figure, C represents H1 output voltage wave, and D represents H2 output voltage wave.
Fig. 4 is two transmit coils of the embodiment of the present invention around the schematic diagram arranged with secondary coil.
In figure, A1 represents that inverter one H1 is sequentially connected in series compensating electric capacity one Cs1 and power distribution electric capacity one Ce1, and A2 represents
Inverter two H2 is sequentially connected in series compensating electric capacity two Cs2 and power distribution electric capacity two Ce2, and A3 represents receiving terminal compensating electric capacity Cr successively
Concatenation rectifier bridge H3 and load RL；Represent for convenience, primary coil one Ls1 thick line represents, primary coil two Ls2 fine rule
Represent.
Specific embodiment
Embodiment
Fig. 1, Fig. 2 and Fig. 4 illustrate, a kind of specific embodiment of the present invention is, a kind of twin coil and around radio energy
Transmission system, including transmitting terminal and receiving terminal, wherein：
A kind of twin coil and around radio energy transmission system, including transmitting terminal and receiving terminal, its structure is：
The concrete composition of described transmitting terminal is：DC source E two ends shunt chopper one H1 and inverter two H2；Inverter
One H1 is passed sequentially through compensating electric capacity one Cs1 and power distribution electric capacity one Ce1 and is connected with transmit coil one Ls1, inverter two H2 according to
Secondary it is connected with transmit coil two Ls2 by compensating electric capacity two Cs2 and power distribution electric capacity two Ce2；Transmit coil one Ls1 and transmission
Coil two Ls2 is identical and and is around on same magnetic core；
Described receiving terminal is sequentially connected in series receiving terminal compensating electric capacity Cr, rectifier bridge H3 and load R by receiving coil LrLConstitute；
The control end of inverter one H1 of described transmitting terminal is all connected with controller KS with the control end of inverter two H2.
Fig. 1, Fig. 2 and Fig. 3 illustrate, a kind of using above-mentioned twin coil and around the output of radio energy transmission system divide
Method of completing the square, its step is：
A, the output determining inverter two H2 according to user's request are β times of output of inverter one H1, then
Power distribution electric capacity one Ce1 of the transmitting terminal and capacitance c of power distribution electric capacity two Ce2e1And ce2It is respectively：WithWherein, ω is inverter work angular frequency, and M is transmit coil one Ls1 and sends line
Enclose the mutual inductance value between two Ls2；
B, according to A power distribution electric capacity one Ce1 that obtains of step and power distribution electric capacity two Ce2 capacitance ce1And ce2Join
After putting and installing, controller KS passes through to adjust the radian value that phase shifting angle controls inverter one H1 and inverter two H2 output voltage,
Thus controlling gross output：When the gross output needing inverter is P, adjusting phase shifting angle makes inverter one H1 and inversion
The output voltage radian value of device two H2 is θL,Can get corresponding output P, its
In, M1For the mutual inductance value between transmit coil one Ls1 and receiving coil Lr, also as transmit coil two Ls2 and receiving coil Lr
Between mutual inductance value, V be DC source E magnitude of voltage, rlFor loading RLResistance value；Now inverter one H1 and inverter two
The output of H2 presses the pro rate output that step A sets.
Claims (1)
1. a kind of twin coil and around radio energy transmission system output distribution method, described twin coil and around nothing
Line electric energy transmission system, including transmitting terminal and receiving terminal, wherein：
The concrete composition of described transmitting terminal is：DC source (E) two ends shunt chopper one (H1) and inverter two (H2)；Inversion
Device one (H1) passes sequentially through compensating electric capacity one (Cs1) and power distribution electric capacity one (Ce1) is connected with transmit coil one (Ls1), inverse
Change device two (H2) passes sequentially through compensating electric capacity two (Cs2) and power distribution electric capacity two (Ce2) is connected with transmit coil two (Ls2)；
Transmit coil one (Ls1) is identical with transmit coil two (Ls2) and and is around on same magnetic core；
Described receiving terminal is sequentially connected in series receiving terminal compensating electric capacity (Cr), rectifier bridge (H3) and load (R by receiving coil (Lr)L) structure
Become；
The control end of inverter one (H1) of described transmitting terminal is all connected with controller (KS) with the control end of inverter two (H2)；
Described twin coil and around radio energy transmission system output distribution method, its step is：
A, the output determining inverter two (H2) according to user's request are β times of output of inverter one (H1), then
The power distribution electric capacity one (Ce1) of transmitting terminal and the capacitance c of power distribution electric capacity two (Ce2)e1And ce2It is respectively：WithWherein, ω is inverter work angular frequency, and M is transmit coil one (Ls1) and sends
Mutual inductance value between coil two (Ls2)；
B, according to the A power distribution electric capacity one (Ce1) that obtains of step and power distribution electric capacity two (Ce2) capacitance ce1And ce2Configuration
And after installing, controller (KS) passes through to adjust the radian that phase shifting angle controls inverter one (H1) and inverter two (H2) output voltage
Value, thus control gross output：When the gross output needing inverter is P, adjusting phase shifting angle makes inverter one (H1)
Output voltage radian value with inverter two (H2) is θL,Can get corresponding output
Power P, wherein, M1For the mutual inductance value between transmit coil one (Ls1) and receiving coil (Lr), also as transmit coil two
(Ls2) the mutual inductance value and receiving coil (Lr) between, V is the magnitude of voltage of DC source (E), rlFor loading (RL) resistance value；This
When inverter one (H1) and inverter two (H2) output press step A set pro rate output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510130015.4A CN104682579B (en) | 2015-03-24 | 2015-03-24 | Twin coil and around radio energy transmission system output distribution method |
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| CN201510130015.4A CN104682579B (en) | 2015-03-24 | 2015-03-24 | Twin coil and around radio energy transmission system output distribution method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106208420B (en) * | 2016-09-14 | 2018-11-16 | 东南大学 | A kind of low fluctuation electric car of reception power is segmented dynamic radio power supply system |
| CN108923509B (en) * | 2018-07-06 | 2021-03-02 | 维沃移动通信有限公司 | Wireless charging transmitting circuit, wireless charging receiving circuit and method |
| CN109450107A (en) * | 2018-12-14 | 2019-03-08 | 引先自动化科技（苏州）有限公司 | A kind of non-contact electric power Transmission system |
| CN109637795A (en) * | 2019-01-21 | 2019-04-16 | 中车青岛四方机车车辆股份有限公司 | Contactless power supply system transmitting terminal and its unit, vehicle |
| CN112248821B (en) * | 2020-09-28 | 2021-11-09 | 中车青岛四方车辆研究所有限公司 | Power distribution method of non-contact traction power supply system of energy storage type rail train |
| CN114545022A (en) * | 2022-01-28 | 2022-05-27 | 中国科学院电工研究所 | High-speed linear motor positioning and speed measuring real-time simulation method and system |
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| CN101662230B (en) * | 2009-09-22 | 2012-09-26 | 南京航空航天大学 | Non-contact multiple input voltage source type resonant converter |
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