CN209217968U - A kind of wireless power transmission reception system half control rectifier bridge soft switch circuit - Google Patents
A kind of wireless power transmission reception system half control rectifier bridge soft switch circuit Download PDFInfo
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- CN209217968U CN209217968U CN201822150648.3U CN201822150648U CN209217968U CN 209217968 U CN209217968 U CN 209217968U CN 201822150648 U CN201822150648 U CN 201822150648U CN 209217968 U CN209217968 U CN 209217968U
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Abstract
The utility model provides a kind of wireless power transmission reception system half control rectifier bridge soft switch circuit, including the main power circuit and auxiliary control circuit being coupled between receiving coil and load；Main power circuit includes bus electrolytic capacitor Co, resonant capacitance Cs, switching tube Qs, diode D1, D2 and D3；Auxiliary control circuit includes integrated transporting discharging, comparator, logic circuit and optocoupler etc..When normal work, there are induced voltages caused by transmitting coil on receiving coil.By sampling resistor partial pressure and isolation optocoupler conversion, the timing of the negative voltage of rectifier bridge input side can detect that.Utilize linear amplifier and comparator, it would be desirable to which voltage generates pwm control signal compared with virtual voltage.Negative voltage signal by control signal and before carries out "AND" logic, and the signal of output is open-minded when body diode is connected by the switching tube for guaranteeing half control rectifier bridge, realizes the function of Sofe Switch.
Description
Technical field
The utility model relates to electronic circuit technology fields, and in particular to a kind of band in wireless power transmission reception system
The soft switch control circuit of alternating voltage detection, load voltage control and logical operation.
Background technique
Wireless power transmission systems are an important components of field of power electronics, at present grinding for wireless power transmission systems
Study carefully very extensive.
For the adjusting control of wireless power transmission systems receiving side voltage, researcher proposes emitting side and indirectly controls and connect
It receives side and directly controls two class control methods.The voltage-controlled method of receiving side is carried out since communication and system inertia are deposited in emitting side
The problem of controlling delay.And directly control in receiving side and faster response speed may be implemented.Receiving side voltage at present
The method of control, one is DC/DC varying circuit is added between rectifier bridge and load, another kind is replaced using full-bridge controllers
Rectifier bridge.But both of which inevitably greatly increases receiver volume.When furthermore considering power loss, high current
The power loss generated when flowing through switching tube flows through the loss generated when diode much smaller than same current, can increase system
Transformation efficiency.In the case, half control rectifier circuit becomes a selection well, can reduce volume and electricity
Pressure is adjusted, moreover it is possible to reduce loss to a certain extent.
But it is seldom for the soft-switching process research of this half control rectifier bridge at present.And in practical engineering application, Sofe Switch
Technology is extremely necessary in powerful rectification circuit.One come can be reduced as hard switching and caused by power loss, two
To decrease Voltage and Current Spikes caused by hard switching and harmonic wave.
In conclusion with the needs that the popularization of wireless power transmission technology and secondary voltage rectify, half control rectifier bridge will be had
It is widely applied very much.Meanwhile it is also essential for the soft switch technique of wherein switching tube, it will be critically important research direction.
Utility model content
The purpose of the utility model is to provide one kind can be applied to wireless power transmission systems half control rectifier bridge, and realization wherein switchs
The circuit of pipe Sofe Switch.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of wireless power transmission reception system half control rectifier bridge soft switch circuit, including be coupled between receiving coil and load
Main power circuit and auxiliary control circuit；
The main power circuit includes bus electrolytic capacitor Co, diode D1-D3, resonant capacitance Cs and switching tube Qs,
In, bus electrolytic capacitor Co coupled in parallel couples bus electrolytic capacitor Co in the both ends load resistance R, the cathode of diode D1, D2
One end, diode D1 anode coupling resonant capacitance Cs one end and switching tube Qs the pole D, the other end coupling of resonant capacitance Cs
Connect one end of receiving coil Ls, the other end of the anode coupling receiving coil Ls of diode D1 and the cathode of diode D3, two poles
The other end of the anode coupling bus electrolytic capacitor Co of pipe D3 and the pole S of switching tube Qs；
The auxiliary control circuit include first using unit, second using unit, resistance R4, sampling capacitance C1, linear
Amplifier U1, comparator U2, isolation optocoupler U3 and logical AND gate chip U4, wherein the input terminal of the first sampling unit is for acquiring
Load voltage, output end couple the reverse side of linear amplifier U1 and one end of sampling capacitance C1, the other end coupling of sampling capacitance C1
One end of connecting resistance R4, the other end of resistance R4 couple the output end of linear amplifier U1 and the in-phase end of comparator U2, linear to transport
The in-phase end for putting U1 is inputted for coupling reference voltage, the reverse side of comparator U2 for carrier wave, the output end coupling of comparator U2
The first input end of logical AND gate chip U4 is connect, second is inputted using the input terminal of unit for acquiring main power circuit rectifier bridge
Voltage, output end couple the input terminal of isolation optocoupler U3, the output end couples logic of isolation optocoupler U3 and the second of door chip U4
Input terminal, the pole G of the output end coupling switching tube Qs of logical AND gate chip U4.
In a kind of specific embodiment, first sampling unit includes resistance R1-R3, and wherein one end coupling of resistance R1 is negative
The electrode input end of resistance R is carried, one end of the other end coupling resistance R2 and R3, the other end ground connection of resistance R2, resistance R3's is another
One end couples the reverse side of linear amplifier U1.
In a kind of specific embodiment, second sampling unit includes resistance R5-R7, wherein one end coupling two of resistance R5
The anode of pole pipe D2, one end of other end coupling resistance R7 and the negative input of isolation optocoupler U3, one end coupling of resistance R6
The anode of diode D1, the other end of other end coupling resistance R7 and the positive and negative anodes input terminal of isolation optocoupler U3.
The each part mentioned above circuit of the utility model constitute complete wireless power transmission receiving side half-controlled rectifier circuit and its
Soft switch circuit realizes the Sofe Switch function of half control rectifier bridge using simple structure.When normal work, deposited on receiving coil
The induced voltage caused by transmitting coil.By sampling resistor partial pressure and isolation optocoupler conversion, rectifier bridge input side can detect that
Negative voltage timing.Utilize linear amplifier and comparator, it would be desirable to which voltage generates pwm control signal compared with virtual voltage.
Negative voltage signal by pwm control signal and before carries out "AND" logic, and the signal of output will guarantee the switch of half control rectifier bridge
Pipe is open-minded when body diode is connected, and realizes the function of Sofe Switch.This circuit has fast response time, reliable Sofe Switch, control
Simple advantage.
Compared with prior art, the utility model have it is following the utility model has the advantages that
(1) it realizes that voltage controls using analog circuit, avoids the increase of the digital control chips such as dsp controller, reduce
Cost；
(2) back-pressure signal extraction is come out using optocoupler, is carried out with PWM wave signal and operation, guarantee driving signal is being opened
It is high level when closing tube body diode current flow.
Detailed description of the invention
Fig. 1 is the circuit diagram of an embodiment of the present invention.
Fig. 2 be an embodiment of the present invention without soft switch control circuit when switching tube timing diagram and rectifier bridge it is defeated
Enter voltage waveform.
Fig. 3 is the signal timing diagram of an embodiment of the present invention.
Specific embodiment
For a further understanding of the utility model, the utility model preferred embodiment is retouched below with reference to embodiment
It states, but it is to be understood that these descriptions are only the feature and advantage for further illustrating the utility model, rather than practical to this
The limitation of novel claim.
Just for several typical embodiments, the utility model is not limited merely to embodiment description for the description of the part
Range.Some technical characteristics in same or similar prior art means and embodiment are replaced mutually also practical new at this
In the range of type describe and claim.
" coupling " in specification includes to be directly connected to, and also comprising being indirectly connected with, such as passes through some active devices, passive device
The connection that part or electrically-conducting medi carry out.
As shown in Figure 1, a kind of wireless power transmission reception system half control rectifier bridge soft switch circuit is present embodiments provided, including
The main power circuit and auxiliary control circuit being coupled between receiving coil and load.
Main power circuit includes bus electrolytic capacitor Co, diode D1-D3, resonant capacitance Cs and switching tube Qs, wherein two
Pole pipe D1-D3 and switching tube Qs constitute main power circuit rectifier bridge.
Specifically, bus electrolytic capacitor Co coupled in parallel, in the both ends load resistance R, the cathode of diode D1, D2 couple female
One end of line electrolytic capacitor Co, one end of the anode coupling resonant capacitance Cs of diode D1 and the pole D of switching tube Qs, resonant capacitance
One end of the other end coupling receiving coil Ls of Cs, the other end and diode D3 of the anode coupling receiving coil Ls of diode D1
Cathode, diode D3 anode coupling bus electrolytic capacitor Co the other end and switching tube Qs the pole S.
Auxiliary control circuit uses unit, resistance R4, sampling capacitance C1, linear amplifier using unit, second including first
U1, comparator U2, isolation optocoupler U3 and logical AND gate chip U4.
Specifically, the input terminal of the first sampling unit is for acquiring load voltage, output end couples the anti-of linear amplifier U1
The one end at phase end and sampling capacitance C1, one end of the other end coupling resistance R4 of sampling capacitance C1, the other end coupling of resistance R4
The output end of linear amplifier U1 and the in-phase end of comparator U2, the in-phase end of linear amplifier U1 compare for coupling reference voltage
The reverse side of device U2 is inputted for carrier wave, the output end couples logic of comparator U2 and the first input end of door chip U4.
Second is isolated light for acquiring main power circuit rectifier bridge input voltage, output end coupling using the input terminal of unit
The input terminal of coupling U3, the output end couples logic of isolation optocoupler U3 and the second input terminal of door chip U4, logical AND gate chip U4
Output end coupling switching tube Qs the pole G.
As a kind of preferred embodiment, the first sampling unit includes resistance R1-R3, and wherein one end coupling of resistance R1 is negative
The electrode input end of resistance R is carried, one end of the other end coupling resistance R2 and R3, the other end ground connection of resistance R2, resistance R3's is another
One end couples the reverse side of linear amplifier U1.
As a kind of preferred embodiment, the second sampling unit includes resistance R5-R7, wherein one end coupling two of resistance R5
The anode of pole pipe D2, one end of other end coupling resistance R7 and the negative input of isolation optocoupler U3, one end coupling of resistance R6
The anode of diode D1, the other end of other end coupling resistance R7 and the positive and negative anodes input terminal of isolation optocoupler U3.
The principle of 2,3 pairs of the utility model circuits and its technological merit are described further with reference to the accompanying drawing:
If not apply the utility model soft switch circuit, when main power circuit rectifier bridge input voltage be timing, open
Logical switching tube Qs will lead to voltage by direct mutation into 0V；When rectifier bridge input voltage is 0V, on-off switching tube Qs will lead to electricity
Pressure is mutated into just by 0V, as shown in Fig. 2 (b).In practical projects, this on-off mode will lead to alternating voltage presence and much open firmly
The voltage of burr and mutation caused by closing.If by chance opening switching tube Qs or rectifier bridge when rectifier bridge input voltage is 0V
On-off switching tube Qs when input voltage is negative, then will not there is a situation where alternating voltages to be mutated.
And when the soft switch circuit specific works of the utility model:
Load voltage is input to the reverse side of linear amplifier U1 through the first sampling unit partial pressure, relatively rear more defeated with reference voltage
A control voltage signal out.Control signal exports rectangle wave control signal Q after carrier signal is compared with comparator U2, such as schemes
Shown in 3 (c), control signal frequency is fQs.Rectifier bridge input voltage Vs is divided as shown in Fig. 3 (a) by the second sampling unit
Afterwards, it is input to the input terminal of isolation optocoupler U3.When exchange input is negative, LEDs ON, the high electricity of isolation optocoupler output
It is flat；When exchange input is positive or when 0V, light emitting diode shutdown, isolation optocoupler exports low level.Therefore isolation optocoupler will be defeated
Out with the square-wave signal Vc of alternating voltage identical frequency fo, as shown in Fig. 3 (b), high level represents exchange negative voltage letter
Number.By Q and Vc progress and operation, new control signal Qs is obtained, as shown in Fig. 3 (d).This signal ensure that switching tube only exists
The case where AC-input voltage just can be opened when being 0V or turn off, avoid the occurrence of hard switching.
The circuit of the utility model can be used for the field that switching tube needs Sofe Switch, can be realized switching tube in rectifier bridge
Reliable Sofe Switch.
The method and its core concept of the above embodiments are only used to help understand the utility model.It should refer to
It out, for those skilled in the art, without departing from the principle of this utility model, can also be to this
Some improvement and modification can also be carried out for utility model, these improvement and modification also fall into the protection scope of the utility model claims
It is interior.
Claims (3)
1. a kind of wireless power transmission receives system half control rectifier bridge soft switch circuit, which is characterized in that including being coupled to receiving coil
Main power circuit and auxiliary control circuit between load；
The main power circuit includes bus electrolytic capacitor Co, diode D1-D3, resonant capacitance Cs and switching tube Qs, wherein female
For line electrolytic capacitor Co coupled in parallel in the both ends load resistance R, the cathode of diode D1, D2 couple the one of bus electrolytic capacitor Co
End, one end of the anode coupling resonant capacitance Cs of diode D1 and the pole D of switching tube Qs, the other end of resonant capacitance Cs connect
One end of take-up circle Ls, the other end of the anode coupling receiving coil Ls of diode D1 and the cathode of diode D3, diode D3
Anode coupling bus electrolytic capacitor Co the other end and switching tube Qs the pole S；
The auxiliary control circuit uses unit, resistance R4, sampling capacitance C1, linear amplifier using unit, second including first
U1, comparator U2, isolation optocoupler U3 and logical AND gate chip U4, wherein the input terminal of the first sampling unit is for acquiring load
Voltage, output end couple the reverse side of linear amplifier U1 and one end of sampling capacitance C1, and the other end of sampling capacitance C1 couples electricity
One end of R4 is hindered, the other end of resistance R4 couples the output end of linear amplifier U1 and the in-phase end of comparator U2, linear amplifier U1
In-phase end for coupling reference voltage, the reverse side of comparator U2 is inputted for carrier wave, and the output end of comparator U2, which couples, patrols
The first input end with door chip U4 is collected, the input terminal of the second sampling unit is for acquiring main power circuit rectifier bridge input electricity
Pressure, output end couple the input terminal of isolation optocoupler U3, and the second of the output end couples logic of isolation optocoupler U3 and door chip U4 is defeated
Enter end, the pole G of the output end coupling switching tube Qs of logical AND gate chip U4.
2. wireless power transmission as described in claim 1 receives system half control rectifier bridge soft switch circuit, which is characterized in that described the
One sampling unit includes resistance R1-R3, wherein the electrode input end of one end coupling load resistance R of resistance R1, other end coupling
One end of resistance R2 and R3, the other end ground connection of resistance R2, the other end of resistance R3 couple the reverse side of linear amplifier U1.
3. wireless power transmission as described in claim 1 receives system half control rectifier bridge soft switch circuit, which is characterized in that described the
Two sampling units include resistance R5-R7, wherein the anode of one end coupling diode D2 of resistance R5, other end coupling resistance R7's
The negative input of one end and isolation optocoupler U3, the anode of one end coupling diode D1 of resistance R6, other end coupling resistance R7
The other end and isolation optocoupler U3 positive and negative anodes input terminal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822150648.3U CN209217968U (en) | 2018-12-20 | 2018-12-20 | A kind of wireless power transmission reception system half control rectifier bridge soft switch circuit |
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| CN201822150648.3U CN209217968U (en) | 2018-12-20 | 2018-12-20 | A kind of wireless power transmission reception system half control rectifier bridge soft switch circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474194A (en) * | 2018-12-20 | 2019-03-15 | 浙江万安亿创电子科技有限公司 | Wireless power transmission receives system half control rectifier bridge soft switch circuit |
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2018
- 2018-12-20 CN CN201822150648.3U patent/CN209217968U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474194A (en) * | 2018-12-20 | 2019-03-15 | 浙江万安亿创电子科技有限公司 | Wireless power transmission receives system half control rectifier bridge soft switch circuit |
| CN109474194B (en) * | 2018-12-20 | 2024-02-06 | 上海万暨电子科技有限公司 | Semi-control rectifier bridge soft switching circuit of wireless power transmission receiving system |
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Address after: Floor 2, building 1, No. 211, Chuanda Road, Pudong New Area, Shanghai, 201200 Patentee after: Shanghai Wanji Electronic Technology Co.,Ltd. Address before: No. 188, Zhongyang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG WANAN YICHUANG ELECTRONIC TECHNOLOGY Co.,Ltd. |
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Address after: 311305, Building 1, 101, 201, 301, Binhe Wealth Factory, No. 88 Binhe Road, Qingshanhu Street, Lin'an District, Hangzhou City, Zhejiang Province (self declared) Patentee after: Yichuang Zhilian (Zhejiang) Electronic Technology Co.,Ltd. Country or region after: China Address before: Floor 2, building 1, No. 211, Chuanda Road, Pudong New Area, Shanghai, 201200 Patentee before: Shanghai Wanji Electronic Technology Co.,Ltd. Country or region before: China |
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