CN109193965A - A kind of blocking type parallel resonance wireless charging transmitting terminal - Google Patents
A kind of blocking type parallel resonance wireless charging transmitting terminal Download PDFInfo
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- CN109193965A CN109193965A CN201811141958.7A CN201811141958A CN109193965A CN 109193965 A CN109193965 A CN 109193965A CN 201811141958 A CN201811141958 A CN 201811141958A CN 109193965 A CN109193965 A CN 109193965A
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- semiconductor
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- parallel resonance
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of blocking type parallel resonance wireless charging transmitting terminals, decoupling module including being sequentially connected setting, controllable lift die block and parallel resonance module, the parallel resonance module includes the inductance L1 and capacitor C2 being arranged in parallel, and the metal-oxide-semiconductor Q5 being arranged in series, one end of the inductance L1 and capacitor C2 is connected with the output end of the controllable lift die block, and the other end is connected to the drain electrode of the metal-oxide-semiconductor Q5, the source electrode ground connection of the metal-oxide-semiconductor Q5；It is characterized in that, further including the capacitor C1 for being connected on the front end the capacitor C2, one end of the capacitor C1 is connected to the output end of the controllable lift die block, and the other end is connected and is grounded with the capacitor C2.The advantages that present invention has and can separate alternating current path and DC channel, avoids alternating current-direct current from mixing, keeps input current steady, is easy to measure monitoring, and charge efficiency is high.
Description
Technical field
The present invention relates to wireless charging technical fields, emit in particular to a kind of blocking type parallel resonance wireless charging
End.
Background technique
Wireless charging technology only can spatially pass through electricity without electrical contact as a kind of New-type charge mode
, the conversion in magnetic field realize transmission of the electric energy from power supply to load, overcome traditional wire charging easily friction, aging the disadvantages of.
Magnet coupled resonant type wireless charging technique is derived from electromagnetic induction principle, by the electricity for applying variation in transmit coil
It flowing to generate the electromagnetic field of variation, the electromagnetic field couples of variation produce charging current to receiving coil in receiving coil,
To realize the wireless charging to load end.Existing wireless charging transmitting terminal mainly uses series resonant circuit and parallel resonance
Circuit, however series resonant circuit is used, charge efficiency is lower.And use antiresonant circuit, then there is alternating current-direct current mixing
Phenomenon influences charge efficiency, and input current should not be measured monitoring so that transmitting terminal input current ripple is obvious.
Summary of the invention
In view of the above shortcomings of the prior art, the technical problems to be solved by the present invention are: how providing one kind can incite somebody to action
Alternating current path and DC channel separate, and alternating current-direct current is avoided to mix, and keep input current steady, are easy to measure monitoring, charge efficiency is high
Blocking type parallel resonance wireless charging transmitting terminal.
In order to solve the above-mentioned technical problem, present invention employs the following technical solutions:
A kind of blocking type parallel resonance wireless charging transmitting terminal, which is characterized in that the controllable liter including being sequentially connected setting
Voltage reduction module and parallel resonance module, the parallel resonance module include the inductance L1 and capacitor C2 being arranged in parallel, and series connection
One end of the metal-oxide-semiconductor Q5, the inductance L1 and capacitor C2 of setting are connected with the output end of the controllable lift die block, the other end
It is connected to the drain electrode of the metal-oxide-semiconductor Q5, the source electrode ground connection of the metal-oxide-semiconductor Q5.
Further, the parallel resonance module further includes the capacitor C1 for being connected on the front end the capacitor C2, the capacitor
One end of C1 is connected to the output end of the controllable lift die block, and the other end is connected and is grounded with the capacitor C2.
Further, the controllable lift die block includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, inductance L2
And the drain electrode of capacitor C3, the metal-oxide-semiconductor Q1 are connected with the output end of the decoupling module, the source electrode of the metal-oxide-semiconductor Q1 and institute
The drain electrode for stating metal-oxide-semiconductor Q3 is connected, and the source electrode of the metal-oxide-semiconductor Q2 is connected with the drain electrode of the metal-oxide-semiconductor Q4, one end of the inductance L2
It is connected to the drain electrode of the source electrode and the metal-oxide-semiconductor Q3 of the metal-oxide-semiconductor Q1, the other end is connected to source electrode and the institute of the metal-oxide-semiconductor Q2
State the drain electrode of metal-oxide-semiconductor Q4；
The source electrode of the source electrode and the metal-oxide-semiconductor Q4 of one end of the capacitor C3 and the metal-oxide-semiconductor Q3 is grounded, the electricity
The other end of appearance C3 is connected to the drain electrode of the metal-oxide-semiconductor Q2 as the output end of the controllable lift die block described in parallel humorous
The input terminal for module of shaking.
It further, further include the decoupling module that power end is set, the decoupling module includes multiple is arranged in parallel
Decoupling capacitor.
Further, the decoupling capacitor is provided with 5, the decoupling capacitor C4 of respectively 470 μ F, the decoupling capacitor of 22 μ F
The decoupling capacitor C6, the decoupling capacitor C8 of the decoupling capacitor C7 of 0.1 μ F and 10 μ F of C5,0.02 μ F.
In conclusion the present invention, which has, to separate alternating current path and DC channel, avoids alternating current-direct current from mixing, make to input
The advantages that electric current is steady, is easy to measure monitoring, and charge efficiency is high.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2~Fig. 5 is the dynamic analysis schematic diagram of the controllable lift die block in the present invention.
Fig. 6~Fig. 9 is the model analysis schematic diagram of the parallel resonance module in the present invention.
Figure 10 is parallel resonance module each section operating current voltage change waveform diagram in the present invention.
Figure 11~15 are the model analysis schematic diagram of parallel resonance module in the prior art.
Figure 16 is parallel resonance module each section operating current voltage change waveform diagram in the prior art.
Figure 17 is the schematic diagram that charging simulation is carried out using the application transmitting terminal.
Figure 18 is the waveform diagram of the transmitting terminal of Figure 17.
Figure 19 is the schematic diagram that charging simulation is carried out using existing transmitting terminal.
Figure 20 is the waveform diagram of the transmitting terminal of Figure 19.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
When specific implementation: as shown in Figure 1, a kind of blocking type parallel resonance wireless charging transmitting terminal, including be sequentially connected and set
The decoupling module 1 set, controllable lift die block 2 and parallel resonance module 3, the parallel resonance module 3 include being arranged in parallel
Inductance L1 and capacitor C2, and the one end of metal-oxide-semiconductor Q5, the inductance L1 and capacitor C2 being arranged in series and the controllable lift pressure
The output end of module 2 is connected, and the other end is connected to the drain electrode of the metal-oxide-semiconductor Q5, the source electrode ground connection of the metal-oxide-semiconductor Q5；Its feature
It is, the parallel resonance module further includes being connected on one end connection of the capacitor C1, the capacitor C1 of the front end the capacitor C2
To the output end of the controllable lift die block 2, the other end is connected and is grounded with the capacitor C2.The controllable lift die block
2 include metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, inductance L2 and capacitor C3, the drain electrode of the metal-oxide-semiconductor Q1 with it is described
The output end for decoupling module 1 is connected, and the source electrode of the metal-oxide-semiconductor Q1 is connected with the drain electrode of the metal-oxide-semiconductor Q3, the metal-oxide-semiconductor Q2's
Source electrode is connected with the drain electrode of the metal-oxide-semiconductor Q4, and one end of the inductance L2 is connected to the source electrode and the MOS of the metal-oxide-semiconductor Q1
The drain electrode of pipe Q3, the other end are connected to the drain electrode of the source electrode and the metal-oxide-semiconductor Q4 of the metal-oxide-semiconductor Q2；One end of the capacitor C3
It is grounded with the source electrode of the metal-oxide-semiconductor Q3 and the source electrode of the metal-oxide-semiconductor Q4, the other end of the capacitor C3 and the metal-oxide-semiconductor Q2
Drain electrode the input terminal of the parallel resonance module 3 is connected to as the output end of the controllable lift die block 2.The decoupling
Module 1 includes multiple decoupling capacitors being arranged in parallel, as shown in Figure 1, the decoupling capacitor C4 of respectively 470 μ F, the decoupling of 22 μ F
Decoupling capacitor C6, the decoupling capacitor C8 of the decoupling capacitor C7 of 0.1 μ F and 10 μ F of capacitor C5,0.02 μ F can using decoupling module
To provide more stable power supply, while the noise that element is coupled to power end is reduced, other elements can be reduced indirectly by this yuan
The influence of part noise.
As shown in Fig. 2~Fig. 5, controllable lift die block includes four MOS switch pipes, forms a H bridge form.By changing
Become metal-oxide-semiconductor Q1~metal-oxide-semiconductor Q4 on state to change output voltage.As shown in Figures 2 and 3, it is connected in metal-oxide-semiconductor Q2, metal-oxide-semiconductor
In the case that Q4 ends, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3 and inductance L2 collectively constitute BUCK circuit.When work, metal-oxide-semiconductor Q1 and metal-oxide-semiconductor
Q3 alternate conduction.
As shown in Fig. 2, metal-oxide-semiconductor Q1 is connected, when metal-oxide-semiconductor Q3 ends, power supply is charged by metal-oxide-semiconductor Q1 to inductance L2, simultaneously
Inductance L2 stablizes output electric current, and capacitor C3 is stabilized the output voltage.
As shown in figure 3, metal-oxide-semiconductor Q3 is connected, when metal-oxide-semiconductor Q1 ends, metal-oxide-semiconductor Q3 is used as freewheeling diode, and inductance L2 passes through
Metal-oxide-semiconductor Q3 stablizes output electric current, and capacitor C3 is stabilized the output voltage.
As shown in Figure 4 and Figure 5, in the case where metal-oxide-semiconductor Q1 conducting metal-oxide-semiconductor Q3 cut-off, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q4 and electricity
Sense L2 collectively constitutes BOOST circuit.When work, metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q4 alternate conduction.
As shown in figure 4, metal-oxide-semiconductor Q4 is connected, when metal-oxide-semiconductor Q2 ends, power supply is charged by metal-oxide-semiconductor Q4 to inductance L2, simultaneously
Capacitor C3 is stabilized the output voltage.
As shown in figure 5, metal-oxide-semiconductor Q2 is connected, when metal-oxide-semiconductor Q4 ends, metal-oxide-semiconductor Q2 is used as freewheeling diode, power supply and inductance
L2, which connects and passes through metal-oxide-semiconductor Q2, stablizes output, and capacitor C3 is stabilized the output voltage.
As shown in Fig. 6~Figure 10, by setting capacitance C1, AC and DC access can be separated, so as to
The ripple for getting rid of input current voltage, avoids alternating current-direct current from mixing, and keeps input current steady, is easy to measure monitoring, charge efficiency
It is high.
As shown in figs. 6 and 10, in t0~t1, metal-oxide-semiconductor Q5 conducting, electric current begins to flow through metal-oxide-semiconductor Q5.Inductance L1's
Under effect, electric current iLStart linearly increasing, formation power supply Vg-> inductance L1- > metal-oxide-semiconductor Q5- > D circuit.
As illustrated in fig. 7 and fig. 10, in t1~t2, metal-oxide-semiconductor Q5 is turned off, and the current direction on inductance is constant, size of current
It is gradually reduced, source current is identical as inductive current.Stored charge on the downside of capacitor, so that the voltage below capacitor be made to increase.Electricity
Sense gradually converts all energy to the process of capacitor.Circuit loop be power supply -> inductance L1- > capacitor C1- >.
As shown in figs, in t2~t3, metal-oxide-semiconductor Q5 is still turned off.Since capacitor is full of energy on last stage,
At this moment capacitor is just to inductive discharge.(pole D of metal-oxide-semiconductor) voltage can decline on the downside of capacitor, and capacitor is transformed into energy above inductance.
As shown in Figure 9 and Figure 10, in t3~t4, capacitor C1Downside voltage drops to 0, and metal-oxide-semiconductor Q5 is open-minded at this time, inductance
The current direction of L1 and upper stage are consistent and are in reduction trend, and source current is consistent with inductive current always.Inductive current
It all flows to power supply and is gradually decrease to 0, inductance energy release finishes.Circuit loop at this time are as follows: metal-oxide-semiconductor Q5- > inductance L1- > power supply
Vg。
As shown in Figure 11~Figure 16, be parallel resonance module in the prior art model analysis schematic diagram and waveform diagram,
As can be seen from the figure the basic friction angle of two kinds of circuits is identical, and maximum difference is that blocking type parallel resonance mobile phone wireless charges
Source current ripple is eliminated in transmitting terminal resonance modules, waveform is almost the same with inductive current, convenient for measurement.
As shown in figure 17, simulation analysis is carried out to improved basic circuit using Multisim circuit simulating software,
The DC voltage source voltage of middle simulation is 8V, resonant inductance L1For 7 μ H, filter capacitor C1With resonant capacitance C2It is 0.055 μ F,
Switching frequency is set as 200KHz.Receiving end resonant inductance L5For 7 μ H, resonant capacitance C9For 0.094 μ F.Switching tube Q7, Q9 and L3Group
At circuit of synchronous rectification, wherein L3For 300 μ H.Receiving end DC-DC conversion circuit uses module LM7815, load electricity in simulations
Resistance is 15 Ω.The waveform for emulating the input terminal of obtained resonance circuit is as shown in figure 18, and abscissa is the time in figure, and ordinate is
Equivalent current values, unit 1V/mA.Improved system can be known in charging by simulation software, and input voltage 8V is defeated
Enter electric current 1.88A；Output voltage 14.1V exports electric current 0.964A.It is obtained by calculation, the charge efficiency of system is after improvement
90.4%.
As shown in figure 19, the DC voltage source voltage of simulation is 8V, transmitting terminal for transmitting terminal basic topology emulation before improvement
Resonant inductance L1For 7 μ H, resonant capacitance C1For 0.11 μ F, switching frequency is set as 200KHz.Receiving end resonance circuit is synchronous with rear class
Rectification circuit is constant, and the waveform of the input terminal of the resonance circuit emulated is as shown in figure 20, and abscissa is the time in figure, indulges and sits
It is designated as equivalent current values, unit 1V/mA.By simulation software can know improve before system charging when, input voltage
8V, input current 1.79A；Output voltage 12.8V exports electric current 0.866A.It is obtained by calculation, the charging effect of system before improving
Rate is 77.4%.It can be seen that improved transmitting terminal charge efficiency greatly promotes.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not limitation with the present invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (5)
1. a kind of blocking type parallel resonance wireless charging transmitting terminal, which is characterized in that the controllable lift including being sequentially connected setting
Die block (2) and parallel resonance module (3), the parallel resonance module (3) they include the inductance L1 and capacitor C2 being arranged in parallel, with
And one end and the output end phase of the controllable lift die block (2) for the metal-oxide-semiconductor Q5, the inductance L1 and capacitor C2 being arranged in series
Even, the other end is connected to the drain electrode of the metal-oxide-semiconductor Q5, the source electrode ground connection of the metal-oxide-semiconductor Q5.
2. blocking type parallel resonance wireless charging transmitting terminal as described in claim 1, which is characterized in that the parallel resonance mould
Block further includes the capacitor C1 for being connected on the front end the capacitor C2, and one end of the capacitor C1 is connected to the controllable lift die block
(2) output end, the other end are connected and are grounded with the capacitor C2.
3. blocking type parallel resonance wireless charging transmitting terminal as described in claim 1, which is characterized in that the controllable lift pressure
Module (2) includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, inductance L2 and capacitor C3, the drain electrode of the metal-oxide-semiconductor Q1
It is connected with the output end of decoupling module (1), the source electrode of the metal-oxide-semiconductor Q1 is connected with the drain electrode of the metal-oxide-semiconductor Q3, described
The source electrode of metal-oxide-semiconductor Q2 is connected with the drain electrode of the metal-oxide-semiconductor Q4, and one end of the inductance L2 is connected to the source electrode of the metal-oxide-semiconductor Q1
With the drain electrode of the metal-oxide-semiconductor Q3, the other end is connected to the drain electrode of the source electrode and the metal-oxide-semiconductor Q4 of the metal-oxide-semiconductor Q2；
The source electrode of the source electrode and the metal-oxide-semiconductor Q4 of one end of the capacitor C3 and the metal-oxide-semiconductor Q3 is grounded, the capacitor C3
The other end be connected to the drain electrode of the metal-oxide-semiconductor Q2 as the output end of the controllable lift die block (2) it is described in parallel humorous
The input terminal of vibration module (3).
4. blocking type parallel resonance wireless charging transmitting terminal as described in claim 1, which is characterized in that further include being arranged in electricity
The decoupling module (1) of source, the decoupling module (1) includes multiple decoupling capacitors being arranged in parallel.
5. blocking type parallel resonance wireless charging transmitting terminal as claimed in claim 4, which is characterized in that the decoupling capacitor is set
5 are equipped with, the decoupling capacitor C6 of the decoupling capacitor C5,0.02 μ F of the decoupling capacitor C4,22 μ F of respectively 470 μ F, 0.1 μ F's goes
The decoupling capacitor C8 of coupling capacitor C7 and 10 μ F.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811141958.7A CN109193965B (en) | 2018-09-28 | 2018-09-28 | Blocking type parallel resonance wireless charging transmitting terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811141958.7A CN109193965B (en) | 2018-09-28 | 2018-09-28 | Blocking type parallel resonance wireless charging transmitting terminal |
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| CN109193965B CN109193965B (en) | 2021-10-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110696642A (en) * | 2019-09-27 | 2020-01-17 | 南京理工大学 | Wireless charging coupling mechanism based on inductance integrated LCC compensation topology |
| CN111766468A (en) * | 2020-07-08 | 2020-10-13 | 重庆理工大学 | Electric topology recognition system of capacitive intelligent experimental island |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000295796A (en) * | 1999-04-02 | 2000-10-20 | Tokin Corp | Non-contact power supply |
| CN103280900A (en) * | 2013-05-31 | 2013-09-04 | 苏州源辉电气有限公司 | High-voltage power-taking and power-supply system based on wireless electricity transmission technology |
| CN104362710A (en) * | 2014-10-20 | 2015-02-18 | 北京金山安全软件有限公司 | Wireless charger and wireless charging system |
| CN106451685A (en) * | 2016-12-09 | 2017-02-22 | 重庆理工大学 | Mobile phone non-contact fast charge system |
| CN106655537A (en) * | 2016-12-12 | 2017-05-10 | 重庆理工大学 | Optimum efficiency tracking based self-adaptive wireless power supply system |
-
2018
- 2018-09-28 CN CN201811141958.7A patent/CN109193965B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000295796A (en) * | 1999-04-02 | 2000-10-20 | Tokin Corp | Non-contact power supply |
| CN103280900A (en) * | 2013-05-31 | 2013-09-04 | 苏州源辉电气有限公司 | High-voltage power-taking and power-supply system based on wireless electricity transmission technology |
| CN104362710A (en) * | 2014-10-20 | 2015-02-18 | 北京金山安全软件有限公司 | Wireless charger and wireless charging system |
| CN106451685A (en) * | 2016-12-09 | 2017-02-22 | 重庆理工大学 | Mobile phone non-contact fast charge system |
| CN106655537A (en) * | 2016-12-12 | 2017-05-10 | 重庆理工大学 | Optimum efficiency tracking based self-adaptive wireless power supply system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110696642A (en) * | 2019-09-27 | 2020-01-17 | 南京理工大学 | Wireless charging coupling mechanism based on inductance integrated LCC compensation topology |
| CN111766468A (en) * | 2020-07-08 | 2020-10-13 | 重庆理工大学 | Electric topology recognition system of capacitive intelligent experimental island |
| CN111766468B (en) * | 2020-07-08 | 2022-08-30 | 重庆理工大学 | Electric topology recognition system of capacitive intelligent experimental island |
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