CN107395036B - A kind of single-stage AC-DC voltage-stablizer for wireless charging - Google Patents
A kind of single-stage AC-DC voltage-stablizer for wireless charging Download PDFInfo
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- CN107395036B CN107395036B CN201710796227.5A CN201710796227A CN107395036B CN 107395036 B CN107395036 B CN 107395036B CN 201710796227 A CN201710796227 A CN 201710796227A CN 107395036 B CN107395036 B CN 107395036B
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- 230000005669 field effect Effects 0.000 claims abstract description 88
- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 101100464782 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CMP2 gene Proteins 0.000 claims abstract description 12
- 101100464779 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CNA1 gene Proteins 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
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- 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
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H02J7/022—
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- H02J7/025—
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- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention discloses a kind of single-stage AC-DC voltage-stablizer for wireless charging, including inductance L, capacitor C1, capacitor C2, capacitor C3, capacitor C4, resistance R, field-effect tube (M1, M2, M3, M4), comparator (CMP1, CMP2, CMP3), error amplifier EA, voltage sense circuit, digitial controller, start-up circuit and triangular-wave generator.The conventional full bridge rectifier being made of four diodes is substituted in the AC-DC voltage-stablizer using four field-effect tube, and in conjunction with control circuit, both it can work in charging mode, it can be worked under zero die worker's operation mode again, under zero die worker's operation mode, load is no longer electrically charged, one freewheeling path is formed in receiving end, a high equivalent impedance can be reflected to limit the electric current of transmitting terminal, power loss under zero mould substantially reduces, the voltage-stablizer saves the DC-DC converter of traditional communication module and second level, and efficiency is substantially improved.
Description
Technical field
The present invention relates to wireless charging technical fields, more particularly to a kind of single-stage AC- DC pressure stabilizing for wireless charging
Device.
Background technique
Recently, the wireless charging market demand is rapidly increasing.Since most of wireless charging standard (such as QI) needs to fill
Electric appliance provides a steady dc voltage, therefore the pressure stabilizing of output voltage becomes the most important function of wireless charging system.
The adjustment of voltage can be obtained in transmitting terminal or receiving end.For the former, system needs to increase a data communication module, this
Also increase the complexity of system design.For the latter, traditional scheme needs the adjuster of a two-stage, including rectification circuit
And reduction voltage circuit.Reduction voltage circuit can be linear voltage regulator, and it is very low that this will lead to efficiency in the case where High Pressure Difference；It is also possible to
DC-DC converter, this brings inductance component to be difficult to be integrated into chip interior.Currently, a kind of resonance adjusts rectifier (3R) solution
Certainly above-mentioned some problems, but the passive rectifier in the system has dragged down the efficiency of system.
Summary of the invention
The embodiment of the present invention provides a kind of single-stage AC-DC voltage-stablizer for wireless charging, using four power field effects
Pipe and control circuit, making four field-effect tube not only by integral cycle algorithm can work in charging mode, but also can work
In zero mould, the DC-DC converter of traditional communication module and second level is saved, efficiency is substantially improved.
A kind of single-stage AC-DC voltage-stablizer for wireless charging, including inductance L, capacitor C1, capacitor C2, capacitor C3, capacitor
C4, resistance R, field-effect tube M1, field-effect tube M2, field-effect tube M3, field-effect tube M4, comparator CMP1, comparator CMP2, ratio
Compared with device CMP3, error amplifier EA, voltage sense circuit, digitial controller, start-up circuit and triangular-wave generator, inductance L with
It is connected between the drain electrode of source electrode and field-effect tube M2 of field-effect tube M1 after capacitor C4 series connection, the drain electrode of field-effect tube M1 and field
The source electrode of effect pipe M2 is connected to adjustment voltage Vreg, and the source electrode of field-effect tube M1 is connected to the source electrode of field-effect tube M3, field
The drain electrode of effect pipe M2 is connected to the drain electrode of field-effect tube M4, and the drain electrode of field-effect tube M3 and the source electrode of field-effect tube M4 connect
Ground, one end of capacitor C1 are connected to adjustment voltage Vreg, other end ground connection, and the non-inverting input terminal of comparator CMP1 is connected to field effect
Should source electrode, reverse inter-input-ing ending grounding, the output end of pipe M3 be connected to the grid of field-effect tube M3, the homophase input of comparator CMP2
End is connected to the drain electrode of field-effect tube M4, reverse inter-input-ing ending grounding, output end are connected to the grid of field-effect tube M4, voltage induced
The input terminal of circuit is connected to adjustment voltage Vreg, and a feedback output end of voltage sense circuit is connected to start-up circuit, another
One feedback output end is connected to the inverting input terminal of error amplifier EA, another input terminal of start-up circuit is connected to threshold value
Voltage Vth, the non-inverting input terminal of error amplifier EA are connected to reference voltage Vref, the output end connection of error amplifier EA
To the inverting input terminal of comparator CMP3, the non-inverting input terminal of comparator CMP3 is connected to triangular-wave generator, capacitor C2's
One end is connected to the inverting input terminal of error amplifier EA, the other end is connected to the output end of error amplifier EA, capacitor C3 with
In parallel with capacitor C2 after resistance R series connection, the output end of start-up circuit and the output end of comparator CMP3 are connected to digital control
The input terminal of device, four output ends of digitial controller be respectively connected to the grid of field-effect tube M1, field-effect tube M2 grid,
The enable end of comparator CMP1 and the enable end of comparator CMP2.
Preferably, field-effect tube M1 and field-effect tube M2 is P-channel MOSFET, field-effect tube M3 and field-effect tube M4
It is N-channel MOS FET.
Using four field-effect tube substitutions by four two poles in single-stage AC-DC voltage-stablizer for wireless charging of the invention
The conventional full bridge rectifier of pipe composition, and in conjunction with control circuit, it can not only work in charging mode, but also can work zero
Under die worker's operation mode, under zero die worker's operation mode, load is no longer electrically charged, and a freewheeling path is formed in receiving end, can be anti-
A high equivalent impedance is penetrated to limit the electric current of transmitting terminal, the power loss under zero mould substantially reduces, which saves biography
The communication module of system and the DC-DC converter of second level, efficiency are substantially improved.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the circuit diagram of the single-stage AC-DC voltage-stablizer provided in an embodiment of the present invention for wireless charging；
Fig. 2 is the single-stage AC-DC voltage-stablizer provided in an embodiment of the present invention for wireless charging under charge mode
Schematic illustration；
Fig. 3 is the single-stage AC-DC voltage-stablizer provided in an embodiment of the present invention for wireless charging under zero die worker's operation mode
Schematic illustration.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of single-stage AC-DC voltage-stablizer for wireless charging, including inductance L, capacitor C1, capacitor C2,
Capacitor C3, capacitor C4, resistance R, field-effect tube M1, field-effect tube M2, field-effect tube M3, field-effect tube M4, comparator CMP1, ratio
Occur compared with device CMP2, comparator CMP3, error amplifier EA, voltage sense circuit, digitial controller, start-up circuit and triangular wave
Device, inductance L are connected between the drain electrode of source electrode and field-effect tube M2 of field-effect tube M1 after connecting with capacitor C4, field-effect tube M1
Drain electrode and the source electrode of field-effect tube M2 be connected to adjustment voltage Vreg, the source electrode of field-effect tube M1 is connected to field-effect tube
The source electrode of M3, the drain electrode of field-effect tube M2 are connected to the drain electrode of field-effect tube M4, the drain electrode of field-effect tube M3 and field-effect tube M4
Source grounding, one end of capacitor C1 be connected to adjustment voltage Vreg, the other end ground connection, the non-inverting input terminal of comparator CMP1
The source electrode, reverse inter-input-ing ending grounding, output end for being connected to field-effect tube M3 are connected to the grid of field-effect tube M3, comparator CMP2
Non-inverting input terminal be connected to the drain electrode of field-effect tube M4, reverse inter-input-ing ending grounding, output end are connected to the grid of field-effect tube M4
Pole, the input terminal of voltage sense circuit are connected to adjustment voltage Vreg, and a feedback output end of voltage sense circuit is connected to
Start-up circuit, another feedback output end are connected to the inverting input terminal of error amplifier EA, another input of start-up circuit
End is connected to threshold voltage vt h, and the non-inverting input terminal of error amplifier EA is connected to reference voltage Vref, error amplifier EA's
Output end is connected to the inverting input terminal of comparator CMP3, and the non-inverting input terminal of comparator CMP3 is connected to triangular-wave generator,
One end of capacitor C2 is connected to the inverting input terminal of error amplifier EA, the other end is connected to the output end of error amplifier EA,
Capacitor C3 is in parallel with capacitor C2 after connecting with resistance R, and the output end of start-up circuit and the output end of comparator CMP3 are connected to
Four output ends of the input terminal of digitial controller, digitial controller are respectively connected to the grid of field-effect tube M1, field-effect tube
The enable end of the grid of M2, the enable end of comparator CMP1 and comparator CMP2, wherein above-mentioned field-effect tube M1 and field effect
Should pipe M2 be P-channel MOSFET, field-effect tube M3 and field-effect tube M4 be N-channel MOS FET.
When feedback voltage Vfb 2 is lower than reference voltage Vref, charge mode is activated.System is equivalent to one at this time
The rectifier of a interconnection.As shown in Fig. 2, system work in positive half period: when VHL be equal to 0, four power field effect pipes
(M1, M2, M3, M4) is all closed.Then when alternating voltage VHL is gradually increasing, VL declines, until | Vreg-VL | it is greater than field
The cut-in voltage of effect pipe M2, field-effect tube M2 conducting, VH are equal to Vreg.VL is further pulled low, and is until dropping below
After the GND of system, comparator CMP2 can open field-effect tube M4, and charging current can flow through field-effect tube M2 and field effect at this time
It should pipe M4.It is begun to decline after VHL reaches peak, VL is begun to ramp up at this time, when VL is increased beyond GND, comparator CMP2
Field-effect tube M4 can be closed.When VL continues to rise, as | Vreg-VL | when cut-in voltage lower than field-effect tube M2, field-effect tube
M1 will be closed.System works in the process of negative half-cycle and similar to the above, repeats no more.When feedback voltage Vfb 2 is higher than benchmark
When voltage Vref, the operating mode of zero mould will be activated, and field-effect tube M1 and field-effect tube M2 will be closed at this time, field effect
Should pipe M3 and field-effect tube M4 be switched on form an afterflow loop.As shown in figure 3, receiving end is in short-circuit condition at this time,
Vreg declines to a great extent.According to reflective loads theory, due to the very big reflected umpedance of the receiving end after short circuit, the electric current of transmitting terminal
Can almost it ignore.The transmitting terminal electric current of very little can only generate the induced voltage of a very little in receiving end, therefore limit output
The power loss of electric current and zero mould state.At this time under zero mould state, load current will be provided by output capacitance C1.
To sum up, this is used in the single-stage AC-DC voltage-stablizer of wireless charging using four field-effect tube substitutions by four two poles
The conventional full bridge rectifier of pipe composition, and in conjunction with control circuit, it can not only work in charging mode, but also can work zero
Under die worker's operation mode, under zero die worker's operation mode, load is no longer electrically charged, and a freewheeling path is formed in receiving end, can be anti-
A high equivalent impedance is penetrated to limit the electric current of transmitting terminal, the power loss under zero mould substantially reduces, which saves biography
The communication module of system and the DC-DC converter of second level, efficiency are substantially improved.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (2)
1. a kind of single-stage AC-DC voltage-stablizer for wireless charging, which is characterized in that including inductance L, capacitor C1, capacitor C2, electricity
Hold C3, capacitor C4, resistance R, field-effect tube M1, field-effect tube M2, field-effect tube M3, field-effect tube M4, comparator CMP1, compare
Device CMP2, comparator CMP3, error amplifier EA, voltage sense circuit, digitial controller, start-up circuit and triangular wave occur
Device, inductance L are connected between the drain electrode of source electrode and field-effect tube M2 of field-effect tube M1 after connecting with capacitor C4, field-effect tube M1
Drain electrode and the source electrode of field-effect tube M2 be connected to adjustment voltage Vreg, the source electrode of field-effect tube M1 is connected to field-effect tube M3
Source electrode, the drain electrode of field-effect tube M2 is connected to the drain electrode of field-effect tube M4, the drain electrode of field-effect tube M3 and field-effect tube M4's
Source grounding, one end of capacitor C1 are connected to adjustment voltage Vreg, other end ground connection, and the non-inverting input terminal of comparator CMP1 connects
The source electrode, reverse inter-input-ing ending grounding, output end for being connected to field-effect tube M3 are connected to the grid of field-effect tube M3, comparator CMP2's
Non-inverting input terminal is connected to the drain electrode of field-effect tube M4, reverse inter-input-ing ending grounding, output end are connected to the grid of field-effect tube M4,
The input terminal of voltage sense circuit is connected to adjustment voltage Vreg, and a feedback output end of voltage sense circuit is connected to starting
Circuit, another feedback output end are connected to the inverting input terminal of error amplifier EA, another input terminal of start-up circuit connects
It is connected to threshold voltage vt h, the non-inverting input terminal of error amplifier EA is connected to reference voltage Vref, the output of error amplifier EA
End is connected to the inverting input terminal of comparator CMP3, and the non-inverting input terminal of comparator CMP3 is connected to triangular-wave generator, capacitor
One end of C2 is connected to the inverting input terminal of error amplifier EA, the other end is connected to the output end of error amplifier EA, capacitor
C3 is in parallel with capacitor C2 after connecting with resistance R, and the output end of start-up circuit and the output end of comparator CMP3 are connected to number
The input terminal of controller, four output ends of digitial controller are respectively connected to the grid of field-effect tube M1, field-effect tube M2
The enable end of grid, the enable end of comparator CMP1 and comparator CMP2.
2. a kind of single-stage AC-DC voltage-stablizer for wireless charging as described in claim 1, which is characterized in that field-effect tube
M1 and field-effect tube M2 is that P-channel MOSFET, field-effect tube M3 and field-effect tube M4 are N-channel MOS FET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710796227.5A CN107395036B (en) | 2017-09-06 | 2017-09-06 | A kind of single-stage AC-DC voltage-stablizer for wireless charging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710796227.5A CN107395036B (en) | 2017-09-06 | 2017-09-06 | A kind of single-stage AC-DC voltage-stablizer for wireless charging |
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| CN107395036A CN107395036A (en) | 2017-11-24 |
| CN107395036B true CN107395036B (en) | 2019-08-13 |
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| CN109639164B (en) * | 2019-01-31 | 2020-01-24 | 甘肃南洋新能源科技发展有限公司 | Rectifier with adjustable output voltage for wireless power transmission |
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| KR102332172B1 (en) * | 2014-09-26 | 2021-11-29 | 삼성전자주식회사 | Wireless power transmitter and wireless power receiver |
| US9991732B2 (en) * | 2015-04-10 | 2018-06-05 | Enovate Medical Llc | Contactless battery system utilizing a bidirectional power converter |
| CN105471286B (en) * | 2015-12-10 | 2017-09-29 | 无锡华润矽科微电子有限公司 | Circuit of synchronous rectification, wireless charging system and synchronous rectification method |
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