CN208337245U - A kind of radio energy transmission system - Google Patents
A kind of radio energy transmission system Download PDFInfo
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- CN208337245U CN208337245U CN201821128399.1U CN201821128399U CN208337245U CN 208337245 U CN208337245 U CN 208337245U CN 201821128399 U CN201821128399 U CN 201821128399U CN 208337245 U CN208337245 U CN 208337245U
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Abstract
The utility model discloses a kind of radio energy transmission systems, it is related to wireless power transmission field, the system includes: the first rectification filtering unit, preposition DC-DC unit, high-frequency inversion unit, primary side compensating unit, transmitting coil, receiving coil, secondary side compensating unit, second rectification filtering unit, postposition DC-DC unit, cell load, first voltage detection unit, first constant pressure adjusts unit, first drive circuit unit, current detecting unit, waveform conditioning unit, phaselocked loop, dead-zone circuit, second drive circuit unit, second voltage detection unit, second constant pressure adjusts unit, third drive circuit unit.Frequency-tracking is realized by phaselocked loop, so that system always works in resonance frequency when resonant parameter changes, inhibits frequency splitting using DC-DC converter adjusting equivalent load in secondary side, to make frequency-tracking not by frequency splitting phenomena impair.
Description
Technical field
The utility model relates to wireless power transmission field, especially a kind of radio energy transmission system.
Background technique
Wireless power transmission technology be by coil couple transmitting energy, compared to conventional wires connection transmission mode more
Add flexible, safe and reliable.Magnet coupled resonant type wireless electric energy transmission technology is stringent to frequency requirement, and when off-resonance frequency is
System efficiency degradation, frequency of use tracking technique can make system always work in resonance frequency, to improve the biography of system
Defeated efficiency.
Traditional frequency tracking method realizes frequency-tracking based on inverter output voltage, electric current using phaselocked loop, but
It will appear frequency splitting phenomenon when system works in overcoupling region, three input impedance zero phase angle frequencies can occur in primary side
Rate, there are two the frequency divided other than natural resonance frequency, the frequency tracked at this time is the frequency of division rather than resonance
Frequency.
Utility model content
The utility model regarding to the issue above and technical need, proposes a kind of radio energy transmission system.
The technical solution of the utility model is as follows:
A kind of radio energy transmission system, the system comprises: the first rectification filtering unit, preposition DC-DC unit, high frequency
Inversion unit, primary side compensating unit, transmitting coil, receiving coil, secondary side compensating unit, the second rectification filtering unit, postposition DC-
DC unit, cell load, first voltage detection unit, the first constant pressure adjust unit, the first drive circuit unit, current detecting list
Member, waveform conditioning unit, phaselocked loop, dead-zone circuit, the second drive circuit unit, second voltage detection unit, the second constant pressure tune
Save unit, third drive circuit unit；
Network voltage becomes direct current after first rectification filtering unit, is adjusted to through the preposition DC-DC unit
It is high-frequency alternating current that the high-frequency inversion cell translation is connected to after predetermined voltage, and the high-frequency inversion unit is connected to the original
Side compensating unit, the primary side compensating unit are made of capacitor, and are composed in series series resonant network with the transmitting coil, institute
State between transmitting coil and the receiving coil coupling transmitting energy, pair side compensating unit is made of capacitor, and with it is described
Receiving coil is composed in series series resonant network and is connected to second rectification filtering unit, and second rectification filtering unit is defeated
Direct current supplies electricity to the cell load out；
The first voltage detection unit detects the output voltage of the preposition DC-DC unit and will test signal access institute
It states the first constant pressure and adjusts unit, first constant pressure adjusts unit output mos pipe driving signal through the second driving circuit list
Member drives the metal-oxide-semiconductor in the preposition DC-DC unit；
The current detecting unit, which detects the electric current of the transmitting coil and will test signal, accesses the waveform conditioning list
Sine wave signal is become square-wave signal and accesses the phaselocked loop, the phaselocked loop output driving by member, the waveform conditioning unit
Signal drives the metal-oxide-semiconductor in the high-frequency inversion unit after the dead-zone circuit and first drive circuit unit；
The second voltage detection unit detects the voltage at the cell load both ends and will test signal access described the
Two constant pressures adjust unit, and second constant pressure adjusts unit output mos pipe driving signal and drives through the third drive circuit unit
Metal-oxide-semiconductor in dynamic postposition DC-DC unit.
Its further technical solution are as follows: the phaselocked loop includes at least 74HC4046 phase-locked loop chip, for changing pressure
Oscillator output frequencies are controlled, the output voltage of the high-frequency inversion unit and the current in phase of the transmitting coil are made.
Its further technical solution are as follows: the preposition DC-DC unit uses BUCK converter, and the preposition DC-DC is mono-
Member controls output voltage by regulating switch pipe trigger pulse duty ratio.
Its further technical solution are as follows: the postposition DC-DC unit uses BUCK converter, and the postposition DC-DC is mono-
Member realizes pressure stabilizing output by regulating switch pipe trigger pulse duty ratio.
The advantageous effects of the utility model are:
Frequency-tracking is realized by phaselocked loop, so that system always works in resonance frequency when resonant parameter changes,
Inhibit frequency splitting using DC-DC converter adjusting equivalent load in secondary side, to make frequency-tracking not by frequency splitting
Phenomena impair.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of radio energy transmission system provided by the embodiment of the utility model.
Fig. 2 is a kind of equivalent model figure of radio energy transmission system provided by the embodiment of the utility model.
Fig. 3 is a kind of equivalent circuit diagram of load provided by the embodiment of the utility model.
Fig. 4 is a kind of equivalent circuit diagram of high-frequency inverter circuit provided by the embodiment of the utility model.
Specific embodiment
Specific embodiments of the utility model will be further explained with reference to the accompanying drawing.
Fig. 1 is a kind of structural block diagram of radio energy transmission system provided by the embodiment of the utility model, such as Fig. 1 institute
Show, which includes the first rectification filtering unit 1, preposition DC-DC unit 2, high-frequency inversion unit 3, primary side compensating unit 4, hair
Ray circle 5, receiving coil 6, secondary side compensating unit 7, the second rectification filtering unit 8, postposition DC-DC unit 9, cell load 10,
First voltage detection unit 11, the first constant pressure adjust unit 12, the first drive circuit unit 13, current detecting unit 14, waveform
Conditioning unit 15, phaselocked loop 16, dead-zone circuit 17, the second drive circuit unit 18, second voltage detection unit 19, the second constant pressure
Adjust unit 20, third drive circuit unit 21.
Network voltage becomes direct current after the first rectification filtering unit 1 as AC power source, through preposition DC-DC unit 2
It is adjusted to be connected to high-frequency inversion unit 3 after predetermined voltage and is converted to high-frequency alternating current, high-frequency inversion unit 3 is connected to primary side benefit
Unit 4 is repaid, primary side compensating unit 4 is made of capacitor, and is composed in series series resonant network, 5 He of transmitting coil with transmitting coil 5
Coupling transmitting energy between receiving coil 6, secondary side compensating unit 7 is made of capacitor, and be composed in series with receiving coil 6 connect it is humorous
Vibrating network is connected to the second rectification filtering unit 8, and the second rectification filtering unit 8 output direct current supplies electricity to cell load 10.
After direct current is adjusted to suitable predetermined voltage by preposition DC-DC unit 2, high-frequency inversion unit 3 is by predetermined voltage
Direct current be converted to high-frequency alternating current.
Preposition DC-DC unit 2 is DC-DC converter, and direct current is converted to the direct current of different voltages.
First voltage detection unit 11 detects the output voltage of preposition DC-DC unit 2 and will test the first perseverance of signal access
Pressure adjusts unit 12, and the first constant pressure adjusting 12 output mos pipe driving signal of unit drives preposition through the second drive circuit unit 18
Metal-oxide-semiconductor in DC-DC unit 2.
Current detecting unit 14 detects the electric current of transmitting coil 5 and will test signal access waveform conditioning unit 15, waveform
Sine wave signal is become square-wave signal access phaselocked loop 16 by conditioning unit 15, and 16 output drive signal of phaselocked loop is through dead-zone circuit
17 and first drive metal-oxide-semiconductor in high-frequency inversion unit 3 after drive circuit unit 13.
Second voltage detection unit 19, which detects the voltage at 10 both ends of cell load and will test signal, accesses the second constant pressure tune
Unit 20 is saved, the second constant pressure adjusts 20 output mos pipe driving signal of unit and drives postposition DC-DC through third drive circuit unit 21
Metal-oxide-semiconductor in unit 9.
Postposition DC-DC unit 9 is DC-DC converter, and direct current is converted to the direct current of different voltages.
Optionally, phaselocked loop 16 includes at least 74HC4046 phase-locked loop chip, and phaselocked loop 16 is for changing voltage controlled oscillator
Output frequency makes the output voltage of high-frequency inversion unit 3 and the current in phase of transmitting coil 5.
Phaselocked loop 16 is controlled by detecting the phase difference of the output voltage of high-frequency inversion unit 3 and the electric current of transmitting coil 5
The output frequency of voltage controlled oscillator processed, phase difference is zero when stablizing.
Optionally, preposition DC-DC unit 2 uses BUCK converter, is controlled by regulating switch pipe trigger pulse duty ratio
Make the output voltage of preposition DC-DC unit 2.
Optionally, postposition DC-DC unit 9 uses BUCK converter, by regulating switch pipe trigger pulse duty ratio come real
Existing pressure stabilizing output.
Preposition DC-DC unit 2 controls its output voltage by regulating switch pipe trigger pulse duty ratio, forces postposition DC-
The regulating switch pipe duty ratio for realization constant-voltage charge of DC unit 9, to control equivalent load.Postposition DC-DC unit 9 passes through tune
It saves duty ratio and realizes pressure stabilizing output, change simultaneously equivalent load to inhibit frequency splitting.
In conjunction with reference Fig. 2, transmitting terminal and receiving end can be equivalent to mutual inductance coupling model, wherein U1For the output of high-frequency inversion unit 3
The fundametal compoment of voltage, L1For the self-induction of transmitting coil 5, L2For the self-induction of receiving coil 6, M is mutual inductance, I1To flow through emission lines
The electric current of circle 5, I2For the electric current for flowing through receiving coil 6, C1For primary side resonant capacitance, C2For secondary side resonant capacitance, RequIt is second
The equivalent resistance of 8 input terminal of rectification filtering unit.It is R according to the condition that frequency splitting occursequ< ω M, wherein ω is resonant angle
Frequency makes it meet R by adjusting the duty ratio change equivalent load of switching tube trigger pulse of postposition DC-DC unit 9equ>ω
M inhibits frequency splitting.The output voltage of postposition DC-DC unit 9 is constant, and duty ratio is determined by input voltage, input voltage by
Preposition DC-DC unit 2 is vacant, as long as therefore controlling the output voltage of preposition DC-DC unit 2 and controlling postposition DC-DC
The duty ratio of the switching tube trigger pulse of unit 9, also just controls equivalent load.Preposition DC-DC unit 2 is converted using BUCK
Device controls its output voltage by regulating switch pipe trigger pulse duty ratio, and postposition DC-DC unit 9 uses BUCK converter, leads to
It overregulates switching tube trigger pulse duty ratio and realizes pressure stabilizing output.
U in conjunction with reference Fig. 3, in Fig. 32For the output voltage of secondary side compensating unit 7, CoFor the second rectification filtering unit 8
Filter capacitor, IinFor the output electric current of the second rectification filtering unit 8, UinFor the output voltage of the second rectification filtering unit 8, UoFor
The output voltage of postposition DC-DC unit 9, IoFor the output electric current of postposition DC-DC unit 9, RinFor the defeated of postposition DC-DC unit 9
Enter equivalent resistance, RLFor ohmic load.Resistance after equivalent twiceMake Requ>ω
M, it is availableWherein, MminFor the minimum value of mutual inductance variation range, RL_maxFor load
Maximum value in variation range.
In conjunction with reference Fig. 4, UbusFor the output voltage of the second rectification filtering unit 8, CbusFor the first rectification filtering unit 1
Filter capacitor, Q1、Q2、Q3、Q4For 4 switching tubes of high-frequency inversion unit 3.U1For amplitude and UbusThe fundamental wave of equal square wave point
Amount,Making system that division not occur should meetTherefore preposition by being arranged
The output voltage of DC-DC unit 2 meets the condition, it is ensured that system will not occurrence frequency in mutual inductance and load variation range
Division.Phaselocked loop 16 would not be influenced when carrying out frequency tracking by frequency splitting phenomenon at this time.
Above-described is only the preferred embodiments of the utility model, and the utility model is not limited to above embodiments.It can
To understand, what those skilled in the art directly exported or associated under the premise of not departing from the spirit and design of the utility model
Oher improvements and changes are considered as being included within the scope of protection of this utility model.
Claims (4)
1. a kind of radio energy transmission system, which is characterized in that the system comprises: the first rectification filtering unit, preposition DC-DC
Unit, high-frequency inversion unit, primary side compensating unit, transmitting coil, receiving coil, secondary side compensating unit, the second rectifying and wave-filtering list
Member, postposition DC-DC unit, cell load, first voltage detection unit, the first constant pressure adjust unit, the first drive circuit unit,
Current detecting unit, waveform conditioning unit, phaselocked loop, dead-zone circuit, the second drive circuit unit, second voltage detection unit,
Second constant pressure adjusts unit, third drive circuit unit；
Network voltage becomes direct current after first rectification filtering unit, is adjusted to make a reservation for through the preposition DC-DC unit
It is high-frequency alternating current that the high-frequency inversion cell translation is connected to after voltage, and the high-frequency inversion unit is connected to the primary side and mends
Unit is repaid, the primary side compensating unit is made of capacitor, and is composed in series series resonant network, the hair with the transmitting coil
Coupling transmitting energy between ray circle and the receiving coil, the pair side compensating unit are made of capacitor, and with the reception
Coil is composed in series series resonant network and is connected to second rectification filtering unit, and the second rectification filtering unit output is straight
Galvanic electricity gives the cell load；
The first voltage detection unit detects the output voltage of the preposition DC-DC unit and will test signal access described the
One constant pressure adjusts unit, and first constant pressure adjusts unit output mos pipe driving signal and drives through second drive circuit unit
Move the metal-oxide-semiconductor in the preposition DC-DC unit；
The current detecting unit, which detects the electric current of the transmitting coil and will test signal, accesses the waveform conditioning unit, institute
Stating waveform conditioning unit becomes the square-wave signal access phaselocked loop, the phaselocked loop output drive signal warp for sine wave signal
The metal-oxide-semiconductor in the high-frequency inversion unit is driven after the dead-zone circuit and first drive circuit unit；
The second voltage detection unit detects the voltage at the cell load both ends and will test signal access second perseverance
Pressure adjusts unit, and second constant pressure adjusts unit output mos pipe driving signal after third drive circuit unit driving
Set the metal-oxide-semiconductor in DC-DC unit.
2. system according to claim 1, which is characterized in that the phaselocked loop includes at least 74HC4046 locking phase ring core
Piece makes the output voltage of the high-frequency inversion unit and the electricity of the transmitting coil for changing voltage controlled oscillator output frequency
Flow same phase.
3. system according to claim 1, which is characterized in that the preposition DC-DC unit uses BUCK converter, described
Preposition DC-DC unit controls output voltage by regulating switch pipe trigger pulse duty ratio.
4. system according to claim 1, which is characterized in that the postposition DC-DC unit uses BUCK converter, described
Postposition DC-DC unit realizes pressure stabilizing output by regulating switch pipe trigger pulse duty ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821128399.1U CN208337245U (en) | 2018-07-16 | 2018-07-16 | A kind of radio energy transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821128399.1U CN208337245U (en) | 2018-07-16 | 2018-07-16 | A kind of radio energy transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208337245U true CN208337245U (en) | 2019-01-04 |
Family
ID=64784106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821128399.1U Expired - Fee Related CN208337245U (en) | 2018-07-16 | 2018-07-16 | A kind of radio energy transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208337245U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736581A (en) * | 2018-07-16 | 2018-11-02 | 江南大学 | A kind of radio energy transmission system |
| CN112311102A (en) * | 2019-07-31 | 2021-02-02 | 中车株洲电力机车研究所有限公司 | Non-contact rail transit power supply system and method |
-
2018
- 2018-07-16 CN CN201821128399.1U patent/CN208337245U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736581A (en) * | 2018-07-16 | 2018-11-02 | 江南大学 | A kind of radio energy transmission system |
| CN108736581B (en) * | 2018-07-16 | 2024-05-07 | 江南大学 | Wireless power transmission system |
| CN112311102A (en) * | 2019-07-31 | 2021-02-02 | 中车株洲电力机车研究所有限公司 | Non-contact rail transit power supply system and method |
| CN112311102B (en) * | 2019-07-31 | 2023-04-25 | 中车株洲电力机车研究所有限公司 | Non-contact rail transit power supply system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190104 Termination date: 20210716 |
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| CF01 | Termination of patent right due to non-payment of annual fee |