CN106787242A - A kind of active rectifier for wireless power transmission - Google Patents
A kind of active rectifier for wireless power transmission Download PDFInfo
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- CN106787242A CN106787242A CN201611191970.XA CN201611191970A CN106787242A CN 106787242 A CN106787242 A CN 106787242A CN 201611191970 A CN201611191970 A CN 201611191970A CN 106787242 A CN106787242 A CN 106787242A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 6
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- H02J5/005—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of active rectifier for wireless electric energy transmission device, the active rectifier structure includes energy receiving module and rectification module and the part of control module three composition.Wherein, energy receiving module, for the electromagnetic wave energy in space to be converted into resonance alternating current, and passes to rectification module by alternating current；Rectification module, for the resonance alternating current in energy receiving module to be rectified into direct current；Control module, the working method for controlling rectification module so that the DC voltage of rectification module output is constant.The present invention realizes the stability contorting of output voltage by controlling switch pipe S, and by controlling the dutycycle of the switching tube S in rectification module, the pulse number that controlled output side joint is received realizes voltage control；DC DC converters need not be cascaded, it is only necessary to sample detecting output voltage, it is not necessary to phase detection device, greatly improve efficiency, simplify structure, reduces cost.
Description
Technical field：
The invention belongs to wireless power transmission technical field, and in particular to a kind of active rectification for wireless power transmission
Device.
Background technology：
In recent years, wireless power transmission technology has obtained quick development.But, under no radio communication conditions, nothing
The precise control always a great problem for receiving side energy pickup and voltage stabilization of line electrical energy devices.
Conventional wireless power transfer radiating circuit produces electromagnetic field of high frequency using inverter, and receiving coil produces electromagnetism
Sensing.Receive side and realize that the common methods of voltage stabilization there are three kinds：Emitting side control diode rectification mode, receive side cascade
The voltage regulating mode of DC-DC converter, active rectification mode.
For the diode rectification mode that emitting side is controlled, when load or coil distance change, in order to realize acceptance line
The voltage stabilizing of circle is, it is necessary to the voltage or frequency that adjust transmitting side inverter receive the voltage of side to stablize.This method control mode,
High cost, generally requires to increase auxiliary radio communication device.
The voltage regulating mode of DC-DC converter is cascaded for receiving side, in order to realize that stablizing secondary receives side voltage stabilization, is needed
The mode for increasing DC-DC converter realizes voltage stabilizing, increases installation cost.
Voltage regulation way is realized for conventional active rectified current, it is necessary to detection voltage current phase, realizes that active rectification is opened
The control of pipe is closed, voltage stabilizing is realized.Control circuit is complicated.
What conventional wireless electric energy was transmitted receives side Voltage Stability Control method Shortcomings.
The content of the invention：
Active rectification the invention aims to realize wireless electric energy transmission device receiving side, without auxiliary circuit
In the case of, the precise control of voltage is realized, it is thus provided that a kind of active rectifier for wireless power transmission.
To reach above-mentioned purpose, the present invention is achieved through the following technical solutions：
A kind of active rectifier for wireless power transmission, including energy receiving module, rectification module and control module；
Wherein,
Energy receiving module, for the electromagnetic wave energy in space to be converted into resonance alternating current, and by resonance alternating current
Spread and pass rectification module；
Rectification module, for the resonance alternating current in energy receiving module to be rectified into direct current；
Control module, the working method for controlling rectification module so that the DC voltage of rectification module output is constant.
Further improvement of the invention is that energy receiving module includes the receiving coil L being sequentially connected in series2And compensating electric capacity
C2；
Rectification module includes switching tube S and the first commutation diode D being sequentially connected in series1, the second commutation diode D2With it is defeated
Go out filter capacitor Cf；
Control module includes the sample circuit, PWM controller and the switch tube driving circuit that are sequentially connected in series；
Wherein, the first commutation diode D1Anode connects the second commutation diode D2Negative electrode, the first commutation diode D1Negative electrode
Connection output filter capacitor CfPositive pole, output filter capacitor CfNegative pole connects the second commutation diode D2Anode；Switching tube S and
Two commutation diode D2It is connected in parallel, the second commutation diode D2Negative electrode connecting valve pipe S drains, the second commutation diode D2Sun
Pole connecting valve pipe S source electrodes；
Sample circuit input connection output filter capacitor CfPositive pole, sample circuit output series connection PWM controller input,
PWM controller output end connecting valve tube drive circuit input, switch tube driving circuit output end connecting valve pipe S grids；
Receiving coil L2Connection compensating electric capacity C2, the second commutation diode D2Anode, compensating electric capacity C2Connection receiving coil L2、
Second commutation diode D2Negative electrode；
During work, load and output filter capacitor CfIt is connected in parallel.
The present invention is further improved, the receiving coil L in energy receiving module2With compensating electric capacity C2Generation high frequency
Resonance, high-frequency resonant generation high frequency sinusoidal electric current circulation, the energy for receiving radio energy emitter, and as current source
Mode provides sinusoidal current energy.
Further improvement of the invention is, when PWM controller controlling switch pipe S closures, by receiving coil L2And compensation
Electric capacity C2The resonance alternating current short circuit of generation, prevents the transmission of energy, energy receiving module by the way of tube short circuit is switched
Storage energy.
Of the invention further improvement be, then the first commutation diode D when switching tube S disconnects1, the second commutation diode
D2By resonance current rectification output, output filter capacitor CfRealize filtering；When switching tube is closed, switching tube S is short by resonance current
Road, not transmission energy.
Further improvement of the invention is, when needing to receive energy, PWM controller output pwm control signal, PWM
Signal frequency is far below resonant frequency, and is switched on or off switching tube S with certain dutycycle.
Further improvement of the invention is that sample circuit detection output voltage, PWM controller adjusts dutycycle size,
Controlling switch pipe driver, and then driving switch pipe S, constantly the number of adjustment output pulse current, adjusts the big of output current
Small, capacitor filtering, realizes voltage stabilizing after filtering.
Further improvement of the invention is to be less than receiving coil resonant frequency using PWM controller frequency, and by inspection
Rectification module output voltage is surveyed as feedback signal.
Further improvement of the invention is to produce adjustable duty cycle using PWM controller, controls rectifier current output
Average value size, the quantity of PWM controller controlled output pulse current, and being filtered using filter capacitor.
Compared with prior art, the present invention has following beneficial effect：
A kind of active rectifier for wireless power transmission of the invention, including energy receiving module and rectification module and control
Molding block；Receiving device is transmitted compared to conventional wireless electric energy, it is not necessary to cascade DC-DC converter, greatly improve whole efficiency, letter
Change structure, reduces cost；
Further, the present invention has current source characteristic, is conducive to the realization of current control；
Further, the present invention prevents the transmission of energy by the way of tube short circuit is switched, and can substantially increase the dynamic of system
State property energy.
Further, the work of the Duty ratio control rectification circuit opened that the present invention passes through controlling switch pipe S, controlled output
The pulse number that side joint is received realizes voltage control, and circuit structure simplifies；
Further, the switching tube of active rectification of the present invention can be operated under optional frequency, reduce answering for control system
Miscellaneous degree, the switching tube of active rectification can be with low frequency operation, so as to substantially reduce switching loss；
Further, the present invention by adjust switching tube S dutycycles adjust commutating pulse number, controlled output electric current it is big
It is small, the stability contorting of output voltage, it is only necessary to sample detecting output voltage, without auxiliary circuits such as complicated phase-detections.
Brief description of the drawings：
Fig. 1 is the active rectifier structured flowchart for wireless power transmission；
Fig. 2 is the active rectifier circuits figure for wireless power transmission；
Fig. 3 is receiving coil L2Middle resonance current waveform；
Fig. 4 be stable state dutycycle D under, active rectification device output current wave；
When Fig. 5 is switching tube S closed loops, circuit working state figure；
When Fig. 6 is that switching tube S disconnects, circuit working state figure.
In figure：1- energy receiving modules, 2- rectification modules, 22- control modules, 3- receiving coils L2, 4- compensating electric capacities C2,
The first commutation diodes of 5- D1, the second commutation diodes of 6- D2, 7- switching tubes S, 8- output filter capacitor Cf, 9- loads, 10- adopts
Sample circuit, 11-PWM controllers, 12- switch tube driving circuits.
Specific embodiment：
The present invention is described in further detail below in conjunction with the accompanying drawings, and described is explanation of the invention rather than limit
It is fixed.
It is a kind of active rectifier structured flowchart for wireless power transmission with reference to Fig. 1, including the He of energy receiving module 1
Rectification module 2 and control module 22.
It is the active rectifier circuits figure specific for wireless power transmission with reference to Fig. 2；Wherein, energy receiving module 1
Including the receiving coil L being sequentially connected in series23 and compensating electric capacity C2 4。
Rectification module 2 includes switching tube S 7 and the first commutation diode D being sequentially connected in series15th, the second commutation diode
D26 and output filter capacitor Cf8。
Control module 22 includes the sample circuit 10, PWM controller 11 and the switch tube driving circuit 12 that are sequentially connected in series.
Wherein, the first commutation diode D15 anodes connect the second commutation diode D26 negative electrodes, the first commutation diode D1
5 negative electrodes connection output filter capacitor Cf8 positive poles, output filter capacitor Cf8 negative poles connect the second commutation diode D26 anodes；Open
Close pipe S 7 and the second commutation diode D26 are connected in parallel, the second commutation diode D26 negative electrode connecting valve pipe S 7 drain, the
Two commutation diode D2The source electrodes of 6 anode connecting valve pipe S 7.
The input of sample circuit 10 connection output filter capacitor Cf8 positive poles, the output series connection PWM controller 11 of sample circuit 10
Input, the input of 11 output end connecting valve tube drive circuit of PWM controller 12, the connection of the output end of switch tube driving circuit 12
The grids of switching tube S 7.
Receiving coil L23 connection compensating electric capacity C24th, the second commutation diode D26 anodes, compensating electric capacity C24 connect
Take-up circle L23rd, the second commutation diode D26 negative electrodes.
During work, 9 are loaded with output filter capacitor Cf8 are connected in parallel.
It is receiving coil L with reference to Fig. 32Middle resonance current waveform；Receiving coil L in energy receiving module 123 and compensation
There is high-frequency resonant in electric capacity C2 4, resonance produces high frequency electric circulation, to receive the energy of radio energy emitter.Energy connects
By module 1 current energy is provided as current source mode.
During with reference to Fig. 5 for switching tube S closed loops, circuit working state；When the controlling switch pipe S 7 of PWM controller 11 is closed, will
Receive lateral capacitance and inductance produces resonance current short circuit.The transmission of energy is prevented by the way of tube short circuit is switched, energy receives
The storage energy of module 1.
During with reference to Fig. 6 for the disconnections of switching tube S 7, circuit working state；Then diode is electric by resonance during the disconnections of switching tube S 7
Stream rectification output, output filter capacitor Cf8 realize filtering.
With reference to Fig. 4 be stable state dutycycle D under, active rectification device output current wave；The detection output electricity of sample circuit 10
Pressure, the regulation dutycycle size of PWM controller 11, controlling switch pipe driver 12, and then driving switch pipe S 7, constantly adjust defeated
Go out the number of pulse current, adjust the size of output current, capacitor filtering, realizes voltage stabilizing after filtering.
Receiving coil resonant frequency is less than using the frequency of PWM controller 11, it is only necessary to detect rectifier output voltage conduct
Feedback signal.Adjustable duty cycle is produced using PWM controller 11, the average value size of rectifier current output is controlled.PWM is controlled
The quantity of the controlled output pulse current of device 11, and only need filter capacitor to be filtered.
Claims (9)
1. a kind of active rectifier for wireless power transmission, it is characterised in that including energy receiving module (1), rectification mould
Block (2) and control module (22)；Wherein,
Energy receiving module (1), for the electromagnetic wave energy in space to be converted into resonance alternating current, and by resonance alternating current
Pass to rectification module (2)；
Rectification module (2), for the resonance alternating current in energy receiving module (1) to be rectified into direct current；
Control module (22), the working method for controlling rectification module (2) so that the DC voltage of rectification module (2) output
It is constant.
2. a kind of active rectifier for wireless power transmission according to claim 1, it is characterised in that energy receives
Module (1) includes the receiving coil L that is sequentially connected in series2And compensating electric capacity C (3)2(4)；
Rectification module (2) includes switching tube S (7) and the first commutation diode D being sequentially connected in series1(5), the second commutation diode
D2And output filter capacitor C (6)f(8)；
Control module (22) includes the sample circuit (10), PWM controller (11) and the switch tube driving circuit (12) that are sequentially connected in series；
Wherein, the first commutation diode D1(5) anode connects the second commutation diode D2(6) negative electrode, the first commutation diode D1
(5) negative electrode connection output filter capacitor Cf(8) positive pole, output filter capacitor Cf(8) negative pole connects the second commutation diode D2(6)
Anode；Switching tube S (7) and the second commutation diode D2(6) it is connected in parallel, the second commutation diode D2(6) negative electrode connecting valve pipe
S (7) drains, the second commutation diode D2(6) anode connecting valve pipe S (7) source electrode；
Sample circuit (10) input connection output filter capacitor Cf(8) positive pole, sample circuit (10) output series connection PWM controller
(11) input, PWM controller (11) output end connecting valve tube drive circuit (12) input, switch tube driving circuit (12)
Output end connecting valve pipe S (7) grid；
Receiving coil L2(3) connection compensating electric capacity C2(4), the second commutation diode D2(6) anode, compensating electric capacity C2(4) connect
Take-up circle L2(3), the second commutation diode D2(6) negative electrode；
During work, (9) and output filter capacitor C are loadedf(8) it is connected in parallel.
3. a kind of active rectifier for wireless power transmission according to claim 2, it is characterised in that energy receives
Receiving coil L in module (1)2And compensating electric capacity C (3)2(4) there is high-frequency resonant, high-frequency resonant produces high frequency sinusoidal electric current loop
Stream, the energy for receiving radio energy emitter, and provide sinusoidal current energy as current source mode.
4. a kind of active rectifier for wireless power transmission according to claim 2, it is characterised in that when PWM controls
Device (11) controlling switch pipe S (7) closure processed, by receiving coil L2And compensating electric capacity C (3)2(4) the resonance alternating current for producing is short
Road, prevents the transmission of energy, energy receiving module (1) storage energy by the way of tube short circuit is switched.
5. a kind of active rectifier for wireless power transmission according to claim 2, it is characterised in that switching tube S
(7) then the first commutation diode D when disconnecting1(5), the second commutation diode D2(6) resonance current rectification is exported, output filtering
Electric capacity Cf(8) filtering is realized；When switching tube is closed, switching tube S (7) is short-circuit by resonance current, not transmission energy.
6. a kind of active rectifier for wireless power transmission according to claim 2, it is characterised in that when needing to connect
During by energy, PWM controller (11) output pwm control signal, PWM signal frequency is far below resonant frequency, and with certain duty
Than being switched on or off switching tube S (7).
7. a kind of active rectifier for wireless power transmission according to claim 2, it is characterised in that sample circuit
(10) detect that output voltage, PWM controller (11) regulation dutycycle size, controlling switch pipe driver (12), and then driving are opened
Pipe S (7) is closed, constantly the number of adjustment output pulse current, adjusts the size of output current, after filtering capacitor filtering, realizes
Voltage stabilizing.
8. a kind of active rectifier for wireless power transmission according to claim 2, it is characterised in that use PWM
Controller (11) frequency is less than receiving coil resonant frequency, and by detecting that rectification module (2) output voltage is used as feedback signal.
9. a kind of active rectifier for wireless power transmission according to claim 2, it is characterised in that use PWM
Controller (11) produces adjustable duty cycle, controls the average value size of rectifier current output, PWM controller (11) controlled output
The quantity of pulse current, and be filtered using filter capacitor.
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| CN201611191970.XA CN106787242A (en) | 2016-12-21 | 2016-12-21 | A kind of active rectifier for wireless power transmission |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964291A (en) * | 2018-08-29 | 2018-12-07 | 广西电网有限责任公司电力科学研究院 | The radio energy transmission system and its control method of dynamic decoupling adjusting output power |
| CN109088556A (en) * | 2018-10-29 | 2018-12-25 | 成都信息工程大学 | A kind of resonant mode rectification circuit and its control method, generator, transformer |
| CN109756137A (en) * | 2019-01-31 | 2019-05-14 | 甘肃南洋新能源科技发展有限公司 | A method of the adjusting rectifier output voltage for wireless power transmission |
| CN109936223A (en) * | 2017-12-12 | 2019-06-25 | 瑞尼斯股份有限公司 | There can be the active rectifier according to the maximum power transmitting and maximal efficiency that are determined by distance |
| CN112491162A (en) * | 2020-12-01 | 2021-03-12 | 上海交通大学 | Wireless power transmission device |
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| CN205004974U (en) * | 2015-08-18 | 2016-01-27 | 山东省科学院自动化研究所 | Double -phase switched reluctance motor controller |
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| CN101154887A (en) * | 2007-10-11 | 2008-04-02 | 天津大学 | Wind power generation power conversion device of direct-driving type permanent magnet synchronous motor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109936223A (en) * | 2017-12-12 | 2019-06-25 | 瑞尼斯股份有限公司 | There can be the active rectifier according to the maximum power transmitting and maximal efficiency that are determined by distance |
| CN108964291A (en) * | 2018-08-29 | 2018-12-07 | 广西电网有限责任公司电力科学研究院 | The radio energy transmission system and its control method of dynamic decoupling adjusting output power |
| CN109088556A (en) * | 2018-10-29 | 2018-12-25 | 成都信息工程大学 | A kind of resonant mode rectification circuit and its control method, generator, transformer |
| CN109088556B (en) * | 2018-10-29 | 2024-03-15 | 成都信息工程大学 | Resonant rectifying circuit, control method thereof, generator and transformer |
| CN109756137A (en) * | 2019-01-31 | 2019-05-14 | 甘肃南洋新能源科技发展有限公司 | A method of the adjusting rectifier output voltage for wireless power transmission |
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| CN112491162B (en) * | 2020-12-01 | 2022-12-27 | 上海交通大学 | Wireless power transmission device |
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Application publication date: 20170531 |