CN109450041A - A kind of wireless charging device of multi gear position - Google Patents
A kind of wireless charging device of multi gear position Download PDFInfo
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- CN109450041A CN109450041A CN201811535950.9A CN201811535950A CN109450041A CN 109450041 A CN109450041 A CN 109450041A CN 201811535950 A CN201811535950 A CN 201811535950A CN 109450041 A CN109450041 A CN 109450041A
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- 230000003321 amplification Effects 0.000 claims abstract description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 8
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 5
- 230000006837 decompression Effects 0.000 claims description 28
- 238000001914 filtration Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000003276 anti-hypertensive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- H02J7/025—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of wireless charging device of multi gear position, belongs to wireless charging field.Voltage selecting unit handles DC power supply, controls switching device in voltage selecting unit so that voltage selecting unit be made to generate different DC voltages by control signal driving unit;DC voltage is changed into high frequency ac signal by high-frequency inversion unit, then is transmitted to primary coil after power amplification unit amplifies;Secondary coil obtains the AC signal of primary coil by electromagnetic induction, after rectified filter unit is changed into direct current signal, control is adjusted to the output electric current of direct current signal in charged current selecting unit again, controls switching device in charging current selecting unit by control signal driving unit so that corresponding resistance access circuit is exported different current signals as the output signal of wireless charging device;The different electric currents that the different DC voltages and charging current selecting unit generated using voltage selecting unit are generated are combined, to provide a variety of charging gears.
Description
Technical field
The invention belongs to wireless charging fields, and in particular to a kind of wireless charging device of multi gear position.
Background technique
In recent years, with the continuous development of science and technology, various terminal equipment emerges one after another.Traditional charging modes are different
Terminal device relies on matched charging cable and charges, and this wired charging method is cumbersome, is unable to satisfy the modern times
Life requirement, wireless charging device come into being.
Wireless charging refers to the Wireless charging coil that wireless charging device is received by the Wireless charging coil of terminal device
The electromagnetic wave launched makes terminal device obtain electric energy, to complete charging using the inductive energy transmitting of low-frequency electromagnetic wave
Process.Existing wireless charging device only has a kind of charging modes of power mostly, i.e. the charging rate of charger is non-adjustable, nothing
Method meets the power demand of actual life.And the existing wireless charging device for being capable of providing a variety of charge modes often circuit knot
Structure and control logic are complex, and the gearing regime provided is limited.
Summary of the invention
It is non-adjustable for the wireless charging device charging rate of the above-mentioned single charging modes of tradition, and it is capable of providing a variety of fill
The limited problem of the gear that the wireless charging device circuit of power mode is complicated, power consumption is high and provides, the present invention propose a kind of multi gear
The wireless charging device of position, circuit structure is simple easily controllable and can provide charging gear as much as possible.
To achieve the above object, the technical solution of the present invention is as follows:
A kind of wireless charging device of multi gear position, including voltage selecting unit, high-frequency inversion unit, power amplification unit,
Primary coil, secondary coil, rectification filtering unit, charging current selecting unit and control signal driving unit;
The input terminal of the voltage selecting unit connects DC power supply, and output end connects the defeated of the high-frequency inversion unit
Enter end, the voltage selecting unit includes multiple concatenated decompression devices, each decompression device switching device in parallel;
The high-frequency inversion unit is for handling the output signal of the voltage selecting unit for high frequency ac signal;
The power amplification unit is for being transmitted to the primary coil after amplifying the high frequency ac signal;
The secondary coil obtains the AC signal of the primary coil by electromagnetic induction;
The rectification filtering unit is for being changed into direct current signal for the AC signal that the secondary coil obtains and carrying out
Output is to the charging current selecting unit after filtering;
The charging current selecting unit includes the resistance of multiple parallel connections, and the resistance in each parallel branch is connected one and opened
Close device;Output signal of the electric current of the charging current selecting unit output as the wireless charging device;
The control signal driving unit controls corresponding switching device according to different charging gears and is switched on or off.
Specifically, the wireless charging device further includes Power Management Unit, it is described when power supply signal is AC signal
Power Management Unit is for being converted to DC power supply for AC power source and being supplied to the voltage selecting unit.
Specifically, the wireless charging device further includes charge protection unit, the charge protection Unit selection model
The chip of SL1053 is monitored and protects to the output signal of the wireless charging device.
The course of work of the invention are as follows:
Voltage selecting unit handles DC power supply, is controlled in voltage selecting unit by control signal driving unit
Switching device is switched on and off, so that corresponding decompression device access circuit is generated different DC voltages by control;High frequency
DC voltage is changed into high frequency ac signal by inversion unit, then is transmitted to primary coil after power amplification unit amplifies;It is secondary
Grade coil obtains the AC signal of primary coil by electromagnetic induction, after rectified filter unit is changed into direct current signal, then passes through
Control is adjusted to the output electric current of direct current signal in charging current selecting unit, passes through control signal driving unit control charging
Switching device is switched on and off in current selecting unit, so that corresponding resistance access circuit is exported different electric currents by control
Output signal of the signal as wireless charging device.Different DC voltages and the charging current choosing generated according to voltage selecting unit
The various combination for selecting the different current signals of unit generation is capable of providing different charging gears, when switching different charging gears by
It controls corresponding in signal driving unit charging gear control voltage selecting unit and charging current selecting unit as needed
Switching device is realized.
The invention has the benefit that a kind of wireless charging device of multi gear position provided by the invention, is emitted by changing
The charging current levels of the voltage input grade at end and receiving end change the charge power of charging unit, solve wireless at present
The single problem of charging unit charging modes;It can be provided according to the various combination of voltage selecting unit and charging current selecting unit
Charging in many ways meets practical application request, increases alternative and flexibility;And circuit structure is simply easily achieved.
Detailed description of the invention
Fig. 1 is the overall structure diagram of wireless charging system work.
Fig. 2 is a kind of structural schematic diagram of wireless charging device of multi gear position provided by the invention in embodiment.
Fig. 3 is a kind of structural representation of voltage selecting unit in a kind of wireless charging device of multi gear position provided by the invention
Figure.
Fig. 4 is a kind of structure of charging current selecting unit in a kind of wireless charging device of multi gear position provided by the invention
Schematic diagram.
Specific embodiment
With reference to the accompanying drawings and examples, technical solution of the present invention is described in detail.
The present invention proposes a kind of wireless charging device of multi gear position, as shown in Fig. 2, inverse including voltage selecting unit, high frequency
Become unit, power amplification unit, primary coil, secondary coil, rectification filtering unit, charging current selecting unit and control signal
Driving unit;It further include Power Management Unit in some embodiments, when power supply signal is AC signal, Power Management Unit is used
It handles as DC power supply in by AC power source conversion Transformer Rectifier and is supplied to voltage selecting unit;Power supply signal in the present embodiment
It for 220V alternating current, selects full-bridge rectification chip that 220V alternating current is carried out AC-DC transformation, then is dropped for the first time with decompression chip
Pressure is supplied to voltage selecting unit.
The input terminal of voltage selecting unit connects DC power supply, and output end connects the input terminal of high-frequency inversion unit, uses
In the multiple and different DC voltage of generation.Voltage selecting unit includes M concatenated decompression devices, each decompression device parallel connection one
A switching device, M are positive integer, as shown in figure 3, voltage selecting unit includes 2 concatenated decompression devices in the present embodiment, when
The decompression ability of 2 decompression devices is not capable of providing 4 kinds of different DC voltages simultaneously, receives control signal by MOSFET and drives
The signal condition of moving cell controls whether that the output voltage to Power Management Unit carries out decompression processing, when control signal driving
When two MOSFET of unit control are opened, when not carrying out decompression processing to DC voltage, voltage selecting unit generates the first
DC voltage;When controlling signal driving unit control and only having the MOSFET on the left side to turn off, DC voltage is depressured by the left side
Device carries out decompression processing, and voltage selecting unit generates second of DC voltage;When control signal driving unit control only has the right side
When the MOSFET shutdown on side, the decompression device that DC voltage passes through the right is subjected to decompression processing, voltage selecting unit generates the
Three kinds of DC voltages;When control signal driving unit, which controls two MOSFET, to be turned off, by DC voltage by two decompressions
Device carries out decompression processing, and voltage selecting unit generates the 4th kind of DC voltage;By the control to each switching device to
Control is input to the voltage of high-frequency inversion unit and power amplification unit, realizes the regulation of primary coil output power, finally changes
Become charge power.With should 2 decompression devices decompression abilities it is identical when, only connect the decompression device on the left side and only connect on the right of
Decompression device is identical to the antihypertensive effect of DC power supply, therefore can generate 3 kinds of different DC voltages.It is depressured in some embodiments
For device using lm7812, lm7805 etc., switching device is that MOSFET uses IRF540.
High-frequency inversion unit is for handling the output signal of voltage selecting unit for high frequency ac signal;Some embodiments
It is middle that high frequency ac signal is become to direct current signal progress DC-AC inversion using 555 and peripheral circuit.
Power amplification unit is for being transmitted to primary coil after amplifying high frequency ac signal;It is sharp in some embodiments
The small signal of high-frequency ac is amplified with triode and peripheral circuit.
Primary coil is used to launch signal, such as can use the parallel resonance that capacitor and primary coil are formed and return
Road is launched by signal.
Secondary coil obtains the AC signal that primary coil issues by electromagnetic induction.
Rectification filtering unit is for being changed into direct current signal for the AC signal that secondary coil obtains and being filtered rear defeated
Charging current selecting unit is given out;AC-DC transformation is carried out to signal using rectifier bridge in some embodiments, recycles capacitor to letter
It number is filtered.
Charging current selecting unit includes the resistance of N number of parallel connection, resistance one derailing switch of series connection in each parallel branch
Part, N are positive integer;As shown in figure 4, charging current selecting unit includes 2 resistance in parallel in the present embodiment, when 2 resistance
Resistance value is not capable of providing 4 kinds of different DC currents simultaneously, and the signal condition of control signal driving unit is received by MOSFET
Come control whether to rectification filtering unit export signal carry out control change charging current size, realize the tune of charge power
Control.When control signal driving unit, which controls two MOSFET, to be turned off, DC current is not shunted, charging current selection
The output signal of unit output rectification filter unit, as the first current class;When control signal driving unit control only has
When the MOSFET on the left side is opened, DC current is shunted by the resistance on the left side, the output of charging current selecting unit is passed through
Electric current after shunting, as second of current class;It, will be straight when the MOSFET for controlling signal driving unit control the right is opened
The resistance that galvanic electricity stream passes through the right is shunted, electric current of the charging current selecting unit output after shunting, as the third
Current class;When control signal driving unit, which controls two MOSFET, opens, DC current is carried out by two resistance
Decompression processing, charging current selecting unit generate the 4th kind of current class;By the control to each switching device to control
The size of charging current realizes the regulation of charge power.With should two resistances it is identical when be capable of providing 3 kinds it is different straight
Galvanic electricity stream;Select resistance for 100 Ω in some embodiments, metal-oxide-semiconductor uses IRF540.
Output signal of the electric current of charging current selecting unit output as wireless charging device;It is wireless in some embodiments
Charging unit further includes charge protection unit, and charge protection unit uses existing charge protection chip, selects in the present embodiment
The chip of model SL1053 is monitored the charged state of wireless charging device, protects, final output signal.
Control signal driving unit controls corresponding switching device according to different charging gears and is switched on or off, to mention
For multiple charging gears, control signal driving unit uses IR2110 driving chip in the present embodiment, is mentioned by centralized control unit
For controlling signal, centralized control unit selects the single-chip microcontroller of model STC89C52.
The present invention changes the voltage input grade of transmitting terminal by voltage selecting unit, to change primary coil output
Power;The size for changing charging current using charging current selecting unit, to change the charging current levels of receiving end, finally
Change the charge power of charging unit.If voltage selecting unit includes M concatenated decompression devices, when each decompression device is depressured
Ability is not capable of providing 2 simultaneouslyMThe different DC voltage of kind can generate M+1 kind when each decompression device decompression ability is identical
Different DC voltages;If charging current selecting unit includes the resistance of N number of parallel connection, can be mentioned when each resistance difference
For 2NKind different DC currents, when each resistance is identical while being capable of providing the different DC current of N+1 kind, below with
Voltage selecting unit include 1 concatenated decompression device and charging current selecting unit include for 1 resistance in parallel in detail
Illustrate the charging modes in the present embodiment.
A kind of wireless charging device of multi gear position provided in this embodiment is selected by voltage selecting unit and charging current
The regulation of unit obtains four kinds of output powers, and then realizes the charging modes of four kinds of different capacities, specifically:
This wireless charging device provides four kinds of charging modes.It is divided into level-one, second level, three-level, level Four charging gear.
When in level-one charging gear, emit signal, control to control signal driving unit using centralized control unit
Signal driving unit controls the grid voltage between source electrodes U of the MOSFET in voltage selecting unitGS>UGS(th), and drain-source voltage across poles
UDS>0;The grid voltage between source electrodes U of the MOSFET in charging current selecting unit is controlled simultaneouslyGS< 0, high voltage letter is obtained with this
Number and high current output.
When in second level charging gear, emit signal, control to control signal driving unit using centralized control unit
Signal driving unit controls the grid voltage between source electrodes U of the MOSFET in voltage selecting unitGS>UGS(th), and drain-source voltage across poles
UDS>0;The grid voltage between source electrodes U of the MOSFET in charging current selecting unit is controlled simultaneouslyGS>UGS(th), and drain-source voltage across poles
UDS> 0, higher voltage signal and reduced-current output are obtained with this.
When in three-level charging gear, emit signal, control to control signal driving unit using centralized control unit
Signal driving unit controls the grid voltage between source electrodes U of the MOSFET in voltage selecting unitGS< 0, while controlling charging current selection
The grid voltage between source electrodes U of MOSFET in unitGS< 0, lower voltage signal and high current output are obtained with this.
When in level Four charging gear, emit signal, control to control signal driving unit using centralized control unit
Signal driving unit controls the grid voltage between source electrodes U of the MOSFET in voltage selecting unitGS<0;Charging current selection is controlled simultaneously
The grid voltage between source electrodes U of MOSFET in unitGS>UGS(th), and drain-source voltage across poles UDS> 0, lower voltage signal is obtained with this
And reduced-current output, charge saturation degree highest at this time.
Example described here is to help technical staff and understands the principle of the present invention, and those skilled in the art can be with
According to the present invention disclosed the technical disclosures make it is various do not depart from various other variations and combinations of the invention, these deformation
It is still within the scope of the present invention with combining.
Claims (3)
1. a kind of wireless charging device of multi gear position, which is characterized in that including voltage selecting unit, high-frequency inversion unit, power
Amplifying unit, primary coil, secondary coil, rectification filtering unit, charging current selecting unit and control signal driving unit;
The input terminal of the voltage selecting unit connects DC power supply, and output end connects the input of the high-frequency inversion unit
End, the voltage selecting unit includes multiple concatenated decompression devices, each decompression device switching device in parallel;
The high-frequency inversion unit is for handling the output signal of the voltage selecting unit for high frequency ac signal;
The power amplification unit is for being transmitted to the primary coil after amplifying the high frequency ac signal;
The secondary coil obtains the AC signal of the primary coil by electromagnetic induction;
The rectification filtering unit is for being changed into direct current signal for the AC signal that the secondary coil obtains and being filtered
After export to the charging current selecting unit;
The charging current selecting unit includes the resistance of multiple parallel connections, resistance one derailing switch of series connection in each parallel branch
Part;Output signal of the electric current of the charging current selecting unit output as the wireless charging device;
The control signal driving unit controls corresponding switching device according to different charging gears and is switched on or off.
2. the wireless charging device of multi gear position according to claim 1, which is characterized in that the wireless charging device also wraps
Power Management Unit is included, when power supply signal is AC signal, the Power Management Unit is for being converted to directly AC power source
Galvanic electricity source is simultaneously supplied to the voltage selecting unit.
3. the wireless charging device of multi gear position according to claim 1 or 2, which is characterized in that the wireless charging device
It further include charge protection unit, the chip of the charge protection Unit selection model SL1053 is to the wireless charging device
Output signal is monitored and protects.
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CN201811535950.9A CN109450041A (en) | 2018-12-14 | 2018-12-14 | A kind of wireless charging device of multi gear position |
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CN201811535950.9A CN109450041A (en) | 2018-12-14 | 2018-12-14 | A kind of wireless charging device of multi gear position |
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CN110262303A (en) * | 2019-04-11 | 2019-09-20 | 泰州悦诚科技信息咨询中心 | Adaptive device control apparatus |
CN111697648A (en) * | 2020-06-10 | 2020-09-22 | 上海空间电源研究所 | Error amplification circuit with three control loops for lithium ion storage battery and control method thereof |
CN113572207A (en) * | 2020-04-28 | 2021-10-29 | 深圳市万普拉斯科技有限公司 | Wireless charging circuit and method and mobile terminal |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110262303A (en) * | 2019-04-11 | 2019-09-20 | 泰州悦诚科技信息咨询中心 | Adaptive device control apparatus |
CN113572207A (en) * | 2020-04-28 | 2021-10-29 | 深圳市万普拉斯科技有限公司 | Wireless charging circuit and method and mobile terminal |
CN111697648A (en) * | 2020-06-10 | 2020-09-22 | 上海空间电源研究所 | Error amplification circuit with three control loops for lithium ion storage battery and control method thereof |
CN111697648B (en) * | 2020-06-10 | 2022-03-04 | 上海空间电源研究所 | Error amplification circuit with three control loops for lithium ion storage battery and control method thereof |
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