CN105958663A - Power supply module for induction type power supply and current signal detection method - Google Patents
Power supply module for induction type power supply and current signal detection method Download PDFInfo
- Publication number
- CN105958663A CN105958663A CN201610332966.4A CN201610332966A CN105958663A CN 105958663 A CN105958663 A CN 105958663A CN 201610332966 A CN201610332966 A CN 201610332966A CN 105958663 A CN105958663 A CN 105958663A
- Authority
- CN
- China
- Prior art keywords
- signal
- current
- reference voltage
- current signal
- supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 230000006698 induction Effects 0.000 title abstract description 5
- 230000001939 inductive effect Effects 0.000 claims description 40
- 230000005611 electricity Effects 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 18
- 238000013459 approach Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 abstract 2
- 230000008859 change Effects 0.000 description 23
- 238000010586 diagram Methods 0.000 description 20
- 230000008569 process Effects 0.000 description 9
- 238000001914 filtration Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 239000011469 building brick Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/72—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for local intradevice communication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Inverter Devices (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The invention discloses a power supply module for an induction type power supply and a current signal detection method, wherein the current signal detection method is used for the power supply module of the induction type power supply, the power supply module comprises a power supply coil and a resonance capacitor, and the current signal detection method comprises the steps of connecting a current detection component in series between the power supply coil and the resonance capacitor so as to obtain a current signal corresponding to the current of the power supply coil; and analyzing the current signal to extract data of a power receiving module of the induction type power supply and judge the load state of the power supply coil driving to the power receiving coil. The signal detection of the present invention can obtain the data of the load end more easily.
Description
The applying date of original application case is on February 12nd, 2014, and the application number of original application case is 201410049320.6, and former
The denomination of invention of application case is " for supply module and the current signal detection method of inductive power-supply supply device ".
Technical field
The present invention relates to a kind of current signal detection method in the supply module of inductive power-supply supply device and phase
Close by electricity module, particularly relate to a kind of to adopt by the detecting of current signal in the supply module of inductive power-supply supply device
Interpretation loading level and metallic foreign body existence is carried out by electric current and driving signal time difference, and by being automatically adjusted trigger bit
Data modulated signal is taken out in the accurate triggering with current signal, and resolves the difference of half period current signal to take out data modulation
The method of signal and relevant by electricity module.
Background technology
In inductive power-supply supply device, for safe operation, need to confirm induction region on its power coil at feed end
For correct current-collecting device, just and carry out electric power transmission under the situation that can receive electric power, in order to recognize whether at feeder ear
For correct current-collecting device, need to be identified by numeric data code transmission.The transmission of numeric data code is to be driven by feeder ear to supply
Electric coil produces resonance, sends electromagnetic energy and is sent to receiving end, to carry out electric power transmission, and when receiving end receives electric power,
The impedance state on receiving coil can be changed by signal modulation technique, then by the resonance carrier wave on feedback influence power coil
Signal intensity.In the prior art, the voltage that on coil, resonance carrier wave occurs and curent change need to be examined with electric current by voltage
Slowdown monitoring circuit takes out, and the change in voltage after taking out needs to be taken out straight by resonance carrier wave by low pass filter by high frequency ac signal
Stream differential wave, electric current also must be first converted into voltage and just can process, and its variable quantity is the least, it is therefore desirable to by amplifying
Process and just can be taken off modulated signal.In Chinese invention patent application 201310228302.X, signal resolution main circuit to be held
Row low pass filtered involves the running such as direct current level coupling, and combines the circuit such as comparator and turned by the modulated signal variable quantity that it is small
Become digital signal, then understood these modulated signals to decode by the software in microprocessor.
But, in place of prior art still has some deficits: first, voltage is the clearest and the most definite with the variable quantity of electric current to be also not sufficiently stable,
When entering the signal resolution circuit of rear end, if cannot resolve small-signal during amplification ratio deficiency, and amplification ratio is excessive is easily mixed into
Noise, so the more difficult design of circuit and unreliable；Second, voltage can be because coil configuration and power transmit big with current change quantity
The different factors such as little and change, especially after power increase, its modulation is than (main resonance carrier wave and the ratio of the modulated signal degree of depth
Example) can diminish, correct decoding can become difficulty, therefore close to cannot modulated signal after fully loaded；3rd, owing to signal need to be through filtering
Resolving after ripple, the modulated signal change on main resonance carrier wave produces change again by wave filter to be needed through several weeks again
Phase, and cycle of changing of modulated signal have to be larger than signal through reaching stable time after wave filter, so transmitting data
Speed can be limited；4th, prior art is only used in signal detection, it is impossible to learn the load state on coil, such as coil
Whether it is fully loaded with or whether has metallic foreign body etc.；5th, signal resolution circuit need to use substantial amounts of electronic building brick, and it is relatively costly,
Reliability can be caused to decline additionally, part is the most, as long as one of them part goes wrong will make circuit malfunction.In view of this,
The real necessity having improvement of prior art.
Summary of the invention
Therefore, a kind of electricity in the supply module of inductive power-supply supply device of offer is provided
Stream signal detecting method and correspondence are by electricity module, and it can use by the detecting of current signal in inductive power-supply supply device
Electric current and driving signal time difference carry out interpretation loading level and metallic foreign body, and believe with electric current by being automatically adjusted triggering level
Number triggering obtain modulated signal, or by resolve half period current signal difference to obtain modulated signal.
The open a kind of current signal detection method of the present invention, for a supply module of an inductive power-supply supply device, institute
Stating supply module and include a power coil and a resonant capacitance, described method is included in described power coil and described resonant capacitance
Between concatenate a current detection component, to obtain corresponding to a current signal of described power coil；And resolve described electric current
Signal, to take out the one of the described inductive power-supply supply device data being subject to electricity module.
Invention additionally discloses a kind of supply module for an inductive power-supply supply device, including a power coil；One is humorous
Shake electric capacity；One current detection component, is serially connected between described power coil and described resonant capacitance, is used for obtaining corresponding to described
One current signal of the electric current of power coil；And a control unit, it is coupled to described current detection component, is used for resolving described
Current signal, to take out the one of the described inductive power-supply supply device data being subject to electricity module.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention one supply module.
Fig. 2 is the schematic diagram of an embodiment of the supply module of Fig. 1.
Fig. 3 is the waveform signal driving signal and coil signal under embodiment of the present invention inductive power-supply supply device zero load
Figure.
Fig. 4 is that embodiment of the present invention inductive power-supply supply utensil has the waveform of load lower driving signal and coil signal to show
It is intended to.
Fig. 5 is the waveform signal that embodiment of the present invention inductive power-supply supply device is fully loaded with lower driving signal and coil signal
Figure.
Fig. 6 is to drive signal and coil letter during embodiment of the present invention inductive power-supply supply device receiving end placement metallic foreign body
Number schematic diagram.
Fig. 7 is the schematic diagram of another embodiment of supply module.
Fig. 8 is current signal and positive half cycle comparator output knot during embodiment of the present invention signal unmodulated period and modulation
The waveform diagram of fruit.
Fig. 9 is current signal and the waveform signal of positive half cycle comparator output result during the modulation of embodiment of the present invention signal
Figure.
Figure 10 is by the waveform diagram of current signal during noise jamming during embodiment of the present invention signal is modulated.
Figure 11 is to have the one of half-wave voltage signal modulation function to be subject to the schematic diagram of electricity module.
Figure 12 is that the embodiment of the present invention carries out the schematic diagram of current signal during half-wave voltage signal modulation.
Wherein, description of reference numerals is as follows:
10 supply modules
102 power coil
104 resonant capacitances
106 current detection components
108 control units
110,110A, 110B are for electric drive unit
S1 current signal
121A, 121B driving means
123A, 123B switch on the bridge assembly
124A, 124B bridge switch assembly
210 power supply units
220 display units
230 current zero comparators
T switching cycle
702 signal interpretation circuit
A1, A2 amplifier
712,714 level generator
722 positive half cycle comparators
724 negative half period comparators
The positive phase voltage signal of VP
VN reverse voltage signal
VR1, VR2 reference voltage
R1, R2 export result
1100 by electricity module
SP1 positive half cycle current signal
SN1 negative half-cycle current signal
Detailed description of the invention
Refer to the schematic diagram that Fig. 1, Fig. 1 are the embodiment of the present invention one supply module 10.As it is shown in figure 1, supply module 10
For an inductive power-supply supply device, it includes power coil 102, resonant capacitance 104, current detection component 106,
Control unit 108 and one supplies electric drive unit 110.Power coil 102 can send energy to receiving end, and receives from receiving end
Feedback signal.Resonant capacitance 104 then carries out resonance, to produce alternating electromagnetic energy for power coil 102 of arranging in pairs or groups.Electric current is examined
Survey assembly 106 to be serially connected between power coil 102 and resonant capacitance 104, can be used to obtain corresponding to power coil 102 electric current
One current signal S1.In general, current detection component 106 can be a current sense resistor, a Hall current sensor (Hall
Effect Current Sensor) or other type of amperometric.Control unit 108 is coupled to current detection component
106, can be used to resolve current signal S1, and then the one of taking-up inductive power-supply supply device is by the data of electricity module.For electric drive
Unit 110 is then used for driving power coil 102 to send energy.
Low-pass filtering must be first carried out before resolving, mould of powering compared to voltage signal in prior art or current signal
Block 10 is not required to can directly be resolved current signal S1 by filtering and be obtained modulated signal, that is, control unit 108 can directly solve
The ac signal that analysis coil produces.But, in ac signal, the method taking out precision current value is the most difficult, especially
Being in wireless charging system, the frequency of alternating current composition is higher and electric current is relatively big, thus is not easy to process.In the case,
Can change by take out and compare size of current produce trigger signal whether by the way of obtain modulated signal, additionally by electric current side
Load condition interpretation can be carried out to detection.
In one embodiment, supply module 10 can obtain a load information by the change of the sense of current, to indicate sensing
The load condition of formula power supply unit, judges whether the load end of inductive power-supply supply device has metallic foreign body simultaneously.Refer to
Fig. 2, Fig. 2 are the schematic diagram of an embodiment of the supply module 10 of Fig. 1.In this instance, can be to power supply for electric drive unit 110
Coil 102 carries out full-bridge driving, therefore includes for electric drive unit 110A and 110B two parts for electric drive unit 110, wherein
Driving means 121A, a switch on the bridge assembly 123A and a bridge switch assembly 124A is included for electric drive unit 110A, and
Driving means 121B, a switch on the bridge assembly 123B and a bridge switch assembly 124B is included for electric drive unit 110B.Separately
On the one hand, supply module 10 also includes power supply unit 210 and a display unit 220.Power supply unit 210 and display unit 220
Function mode have been disclosed in front case Chinese invention patent application 201310228302.X, be not repeated herein.
The load information of inductive power-supply supply device to be obtained, refers to the driving signal switching at power coil 102 two ends
Time point and coil current zero time point.Refer to Fig. 3, Fig. 3 is embodiment of the present invention inductive power-supply supply device
Unloaded lower driving signal A, B and the waveform diagram of coil signal.Drive signal A and B to be respectively to control for electric drive unit
The switching signal of 110A and 110B, it can drive power coil 102 by the intraware for electric drive unit 110A and 110B
And resonant capacitance 104 produces resonance.Fig. 3, as a example by full-bridge drives, i.e. drives switching signal the most reverse for signal A and B.Such as figure
Shown in 3, driving signal A and B to carry out electric current on power coil 102 and pull, in a no-load condition, the electric current through coil does not has
Meet obstructions, can present the waveform of triangular wave, and electric current can between power coil 102 and resonant capacitance 104 two way alternate stream
Dynamic.When electric current two way alternate, having a time point is currentless state, i.e. the time point of electric current zero.Week is driven each
In phase T, electric current all can make zero twice.For driving signal A, when driving signal A at high potential, represent what electric current up pushed away
Strength, after driving signal A to be down to electronegative potential, electric current also begins to conversion direction.When zero load, drive signal A switching electric potential extremely
The time of electric current zero is about 1/4th of switching cycle T.
Refer to Fig. 4, Fig. 4 is that embodiment of the present invention inductive power-supply supply utensil has load lower driving signal A, B and line
The waveform diagram of ring signal.As shown in Figure 4, after adding load, because power coil 102 and resonant capacitance 104 and receiving end
Coil and electric capacity to produce resonance interactive, so electric current starts to produce change.When load down, the time point meeting of electric current zero
Move closer to the time point driving signal A to switch to electronegative potential.
Refer to Fig. 5, Fig. 5 is fully loaded lower driving signal A, the B of embodiment of the present invention inductive power-supply supply device and coil letter
Number waveform diagram.When inductive power-supply supply device full load, it is (i.e. maximum that supply module 10 has maximum thrust to receiving end
Energy shifts), after exceeding this maximum, power and charge efficiency all can decline.As it is shown in figure 5, under full-load conditions, drive
The time point of dynamic signal A switching electric potential can be substantially equal to the time point of electric current zero.Additionally, when inductive power-supply supply device transships
Time, drive the time point of signal A switching electric potential then to lag behind the time point of electric current zero.
Consequently, it is possible to control unit 108 can be according to time point and the electric current driving signal A to be switched to electronegative potential by high potential
The time difference of the time point of zero, it is judged that the load condition of inductive power-supply supply device, and then obtain load information.When driving letter
The time difference of the time point of number A switching electric potential and the time point of electric current zero substantially drive signal A switching cycle T four/
For the moment, control unit 108 judges that the load condition of inductive power-supply supply device is as unloaded；When driving signal A switching electric potential
Between point with electric current zero time point time difference less than drive signal A switching cycle T four/for the moment, control unit 108
Judge that inductive power-supply supply utensil has load；And when the time point of the time point with electric current zero driving signal A switching electric potential
Time difference level off to zero time, control unit 108 then judges that inductive power-supply supply device is close to full load condition.On the other hand, by
In driving voltage signal the most anti-phase with driving signal A for signal B, therefore also dependent on the time driving signal B switching electric potential
Point judges with the time point of electric current zero, and its judgment mode uses the judgment mode driving signal A identical, at this with aforementioned
Do not repeat.
In this instance, current detection component 106 only obtains the time point of electric current zero when current transformation direction.In other words
Saying, current detection component 106 takes out sense of current to carry out signal interpretation, can not consider size of current.Therefore, examine at electric current
The outfan surveying assembly 106 can arrange a current zero comparator 230, to produce a corresponding output according to sense of current
Value.For example, when electric current is forward, exportable 1 (high potential) of current zero comparator 230；When electric current is reverse, electricity
Stream zero point comparator 230 then exports 0 (electronegative potential), owing to the information needed for control unit 108 is the time point of electric current zero, because of
This need not limit which direction as forward.Consequently, it is possible to current zero comparator 230 can be by sense of current information transmission
To control unit 108, and get rid of size of current.And the letter that control unit 108 can be exported according to current zero comparator 230
Number, the time point of calculating current zero.
It should be noted that current signal S1 is sent to comparator or the control unit of rear end the most as an electrical current,
It is likely in the form of voltage, digital form or other form transmission.For example, in the above-described embodiments, current detecting group
Part 106 can include that a resistance is serially connected between power coil 102 and resonant capacitance 104, and current signal S1 can be resistance two ends
Voltage subtract each other obtained by result, current signal S1 is sent to current zero comparator 230 by current detection component 106 again, with
Zero potential compares.In the case, current signal S1 is the voltage form signal corresponding to coil current, and passes through
Direction with the multilevel iudge coil current of zero potential.
In one embodiment, control unit 108 includes an intervalometer, and the time point for calculating current zero is believed with driving
The time difference of the time point of number A and B switching electric potential.When driving signal A and B switching electric potential, control unit 108 starts intervalometer
And start timing.(time point of electric current zero), control unit when current signal S1 is switched to 0 by 1 or switched to 1 by 0
108 stop timing.Then, control unit 108 can obtain according to intervalometer time span and drive the cutting of signal A and B
Change cycle T, it is judged that the load condition of inductive power-supply supply device.
Whether, under unloaded, heavy duty or full load condition, the size of current on power coil 102 is all difficult to precisely differentiate,
But certainly existing the cross point of zero, this return-to-zero i.e. can be used to interpretation signal.In the case, need not move through due to signal
Filter process, the time also processed signal without waiting for wave filter before analytic signal, conversion speed can
Thus promote.Additionally, compared to prior art detects amplifier or the filtering that load state on coil is necessarily limited to simulate
The design of circuit carries out electric current and could calculate with voltage analysis, and the present invention can analyze load state by intervalometer, use
Part is less, therefore has the advantage such as low cost and high-reliability.According to current signal processing technology, the speed of processor and
Timing ability processes circuit far above analog-converted, therefore, by the process of control unit 108, signal processing can be substantially improved
Ability.In addition, the time difference interpretation mode of the present invention also can be used to judge whether load end exists metallic foreign body.
Refer to Fig. 6, Fig. 6 is that embodiment of the present invention inductive power-supply supply device receiving end drives letter when there is metallic foreign body
Number A, B and the schematic diagram of coil signal.As shown in Figure 6, when receiving end exists metallic foreign body, power coil 102 can produce pole
Big electric current and change in voltage, but, owing to metallic foreign body cannot to produce resonance interactive with power coil 102, therefore electric current
Phase place is still identical with Light Condition, that is, the time point of electric current zero still falls behind the time point four points driving signal A switching electric potential
One of time of switching cycle T.Consequently, it is possible to the time point that control unit 108 can be made zero by size of current and electric current
Judge whether receiving end exists metallic foreign body relative to the time point driving signal A switching electric potential.
It should be noted that the present invention can be obtained not via filtering be subject to by the curent change on detecting power coil
The data of electricity end, in the above-described embodiments, the data of acquirement can be the phase whether load information or load end exist metallic foreign body
Pass information.But, in wireless charging technology, the purpose obtaining data is the interpretation by modulating data, it is judged that receiving end
Whether it is correct current-collecting device.Therefore, in the examples below, will be believed by the electric current acquired by current detection component 106
Number S1, carries out interpretation for modulated signal produced by electricity module, and then obtains modulation data.
Refer to the schematic diagram of another embodiment that Fig. 7, Fig. 7 are supply module 10.The framework of supply module 10 in Fig. 7
Similar with the supply module 10 of Fig. 2, assembly and the signal therefore with identical function all represent with same-sign.Fig. 7's Yu Fig. 2
The Main Differences of supply module 10 is, the supply module 10 of Fig. 7 also includes a signal interpretation circuit 702, signal interpretation circuit
702 include amplifier A1 and A2, level generator 712 and 714, one positive half cycle comparator 722 and a negative half period comparator
724.Amplifier A1 and A2 can receive current signal S1, and by part and reverse electricity corresponding to forward current in current signal S1
The part of stream is amplified respectively, then is respectively converted into an a positive phase voltage signal VP and reverse voltage signal VN, wherein, amplifier A1
Directly part corresponding to forward current in current signal S1 is amplified and is converted to positive phase voltage signal VP, and A2 pair, amplifier
In current signal S1 corresponding to the part of reverse current carry out anti-phase after amplify again, to produce reverse voltage signal VN.Typically
For, the current signal S1 obtained due to current detection component 106 is less, it usually needs could process after amplifying.And it is anti-phase
Signal can first transfer positive phase signals to, in order to back-end processor carries out signal processing.Level generator 712 and 714 is respectively intended to produce
Raw reference voltage VR1 and VR2.Positive half cycle comparator 722 may compare positive phase voltage signal VP and reference voltage VR1, and at positive
When voltage signal VP is more than reference voltage VR1, trigger the positive half period part of modulated signal.Negative half period comparator 724 may compare
Reverse voltage signal VN and reference voltage VR2, and when reverse voltage signal VN is more than reference voltage VR2, trigger modulated signal
Negative half cycle portion.
When being driven for electric drive unit 110 every time, can draw mutually between power coil 102 and resonant capacitance 104
Pull and resonance occurs, and produce alternating current.The electric current of alternating current can produce change according to sensing situation from driving situation different,
Its change can be converted to current signal S1 by current detection component 106, and due to coil current and current signal S1 all without
Crossing low-pass filtering, therefore current signal S1 is the signal of high frequency, is difficult to directly by analog-digital converter (Analog-to-
Digital Converter, ADC) be converted to digital signal and process.In the case, can first preset a differentiation level to make
For reference voltage VR1 or VR2, and within the specific period by electricity module unmodulated signal, big according to positive phase voltage signal VP
In ratio or the reverse voltage signal VN ratio more than reference voltage VR2 of reference voltage VR1, reference voltage VR1 or VR2 is entered
Row sum-equal matrix.
As a example by the signal resolution of positive half period, refer to Fig. 8, Fig. 8 be embodiment of the present invention signal unmodulated period and
During modulation, current signal S1 and positive half cycle comparator 722 export the waveform diagram of result R1.As shown in Figure 8, by electricity mould
In the period of block unmodulated signal, the current signal S1 corresponding to coil current can be upper and lower along with noise or coil coupling state
Fluctuation, when current signal S1 is more than reference voltage VR1, the positive exportable R1=1 of half cycle comparator 722, and as current signal S1
During less than reference voltage VR1, the positive exportable R1=0 of half cycle comparator 722.In this instance, control unit 108 can be by electricity module
During unmodulated signal, within a specific period, check that whether each current signal S1 be more than reference voltage VR1 triggering just half
Week comparator 722 and produce output result R1=1, calculate this specific period internal trigger produce output result R1=1 simultaneously
Ratio.When the ratio that current signal S1 triggers is higher, control unit 108 can improve the level of reference voltage VR1 makes triggering amount
Reduce；When the ratio that current signal S1 triggers is on the low side, control unit 108 can reduce the level of reference voltage VR1 makes triggering amount
Increase；And under the situation that the ratio of current signal S1 triggering is moderate, control unit 108 then maintains the level of reference voltage VR1.
For example, control unit 108 controllable current signal S1 triggers and exports the ratio of R1=1 and falls between 70%～80%,
If the ratio that in judging one period of period, current signal S1 triggers is more than 80%, control unit 108 can improve reference voltage VR1
Level, to reduce the triggering amount of subsequent current signal S1；If the ratio that in judging one period of period, current signal S1 triggers is less than
When 70%, control unit can reduce the level of reference voltage VR1, to improve the triggering amount of subsequent current signal S1.Consequently, it is possible to
When system noise causes triggering amount to increase relatively greatly, control unit 108 can improve the level of reference voltage VR1 makes triggering amount subtract
Few, and then avoid noise to cause the erroneous judgement of modulated signal.
Refer to Fig. 9, Fig. 9 is that during embodiment of the present invention signal is modulated, current signal S1 and positive half cycle comparator 722 are defeated
Go out the waveform diagram of result R1.Fig. 9 is that the waveform during being modulated by signal in Fig. 8 launches, to facilitate explanation.As it has been described above,
After reference voltage VR1 has set, if during receiving end unmodulated signal, within any a period of time, current signal S1 triggers
And the ratio exporting R1=1 should fall 70%～80%.If occurring that longer period of time triggers (i.e. to export result R1 to hold
Continue is 0) or the few situation of triggering amount, represent that receiving end has started to modulated signal, as shown in Figure 9.During signal is modulated, meeting
There is bigger triggering amount (such as 70%～80%) in a period of time occurs, and the triggering amount in a period of time is minimum (such as less than
20%).In the case, control unit 108 can obtain modulated signal according to the triggering amount size in each period of period.This
Outward, during signal is modulated, touching in the period that the most sustainable basis of level size of reference voltage VR1 has bigger triggering amount
The ratio of sending out is adjusted, to get rid of noise jamming when change occurs in system environments.
Refer to Figure 10, Figure 10 is by the ripple of current signal S1 during noise jamming during embodiment of the present invention signal is modulated
Shape schematic diagram.As shown in Figure 10, inductive power-supply supply device, can be because default or environmental factors make signal become when running
Obtaining in a jumble, in the prior art, signal is required for being demodulated by wave filter, and the signal jitter that noise causes may make
Demodulation result is indefinite.In comparison, by embodiments of the invention, each drive cycle can obtain independent current signal
S1, and each current signal S1 can have the definite result triggering or not have triggering, control unit 108 can according to than
Output result R1 of relatively device or R2 judge the situation that signal is modulated.Additionally, need to make compared to the low pass filter of prior art
Easily producing error with more passive component (such as resistance, inductively or capacitively), the assembly that the circuit of the present invention uses is less,
And predominantly can the integrated circuit of high integration, therefore there is higher stability.
It should be noted that the present invention can be in the case of not being filtered signal, directly according to the change of coil current
Change and obtain modulated signal.In one embodiment, control unit 108 can distinguish the electric current change of interpretation positive half period and negative half-cycle
Change, current signal S1 will separate with the part of reverse current corresponding to the part of forward current and produce corresponding positive half cycle
After current signal and negative half-cycle current signal, further according to both difference interpretation modulated signals.In Chinese invention patent application
Numbers 201210169832.7 and Chinese invention patent application 201310228302.X in, be mainly by electricity module with all-view signal
The mode of modulation modulates data.The present invention then uses half-wave voltage signal modulator approach instead so that positive half cycle current signal and negative half period
Notable difference is produced between current signal.For example, refer to Figure 11, Figure 11 is to have the one of half-wave voltage signal modulation function to be subject to
The schematic diagram of electricity module 1100.As shown in figure 11, it is subject to the framework of electricity module 1100 similar in appearance to front case Chinese invention patent application number
In Fig. 2 of 201310228302.X by electricity module, assembly and signal that therefore function is identical all represent with same-sign.By electricity
Module 1100 is with the Main Differences by electricity module of Chinese invention patent application 201310228302.X, by electricity module
The signal feedback circuit 23 of 1100 does not includes signal modulated resistance B3, controls diode B4, Zener diode B5 and switch module
B6.Therefore, half-wave voltage signal modulation is carried out by electricity module 1100 by signal modulated resistance A3.By other mould in electricity module 1100
Block and assembly all have been disclosed in Chinese invention patent application 201310228302.X, are not repeated herein.
Refer to Figure 12, Figure 12 is that the embodiment of the present invention carries out the schematic diagram of current signal S1 during half-wave voltage signal modulation.As
Shown in Figure 12, current signal S1 can disassemble as forward and reverse part according to the sense of current, to produce positive half cycle current signal
SP1 and negative half-cycle current signal SN1.During unmodulated signal, positive half cycle current signal SP1 and negative half-cycle current signal SN1
The most persistently producing a certain degree of variable quantity, this variable quantity may be caused by load or noise, and is similar to all-view signal modulation
The curent change caused.After receiving end proceeds by half-wave voltage signal modulation, the variable quantity of negative half-cycle current signal SN1 is bright
Show and reduce, and difference slightly only occurs in positive half cycle current signal SP1.In the case, control unit 108 can be according to just half
The signal difference of all current signal SP1 and negative half-cycle current signal SN1 carries out signal resolution.For example, control unit 108
Can be when the difference of positive half cycle current signal SP1 and the change amount signal of negative half-cycle current signal SN1 be more than a marginal value, it is judged that
Receiving end is just in modulated signal, and starts to read modulated signal.It should be noted that receiving end signal feedback circuit not
Limiting the phase place of semi-wave modulated, the current signal S1 variable quantity therefore fed back on power coil 102 possibly be present at positive half cycle
Current signal SP1 or negative half-cycle current signal SN1, and difference between the two found out by 108 need of control unit.
In sum, the supply module of the present invention can provide a kind of data receiver method.The method can detect power coil
On curent change, not by filtering and obtain the data of receiving end, these data can include the load of inductive power-supply supply device
Whether information, receiving end have the information of metallic foreign body or by the electricity modulated signal etc. that produces of module.The present invention is straight by processor
Connecing each current signal of process, the resolution of signal can be substantially improved, and the most therefore processing speed increases.Meanwhile, do not make
In the case of wave filter, the circuit unit within supply module is less, therefore has the advantage such as low cost and high-reliability.
The foregoing is only presently preferred embodiments of the present invention, all equalizations done according to the claims in the present invention change and repair
Decorations, all should belong to the covering scope of the present invention.
Claims (15)
1. a current signal detection method, for a supply module of an inductive power-supply supply device, described supply module bag
Including a power coil and a resonant capacitance, described method includes:
A current detection component is concatenated, to obtain corresponding to described supply lines between described power coil and described resonant capacitance
One current signal of the electric current of circle；And
Resolve described current signal, believed by a modulation produced by electricity module taking out the one of described inductive power-supply supply device
Number；
Wherein, resolve described current signal to be believed by the described modulation of electricity module described in described inductive power-supply supply device to take out
Number step include:
Described current signal will amplify respectively corresponding to the part of a forward current and the part of a reverse current, and turn respectively
It is changed to positive phase voltage signal and a reverse voltage signal；
Set one first reference voltage and one second reference voltage；
Relatively described positive phase voltage signal and described first reference voltage, to produce a positive half period portion of described modulated signal
Point；And
Relatively described reverse voltage signal and described second reference voltage, to produce a negative half-cycle portion of described modulated signal
Point.
2. current signal detection method as claimed in claim 1, it is characterised in that resolve described current signal described to take out
The described of inductive power-supply supply device is included by the step of described modulated signal produced by electricity module:
Before taking out described modulated signal, described current signal is not filtered.
3. current signal detection method as claimed in claim 1, it is characterised in that the size of described first reference voltage is root
It is more than described first reference voltage by described positive phase voltage signal in the specific period of electricity module unmodulated signal according to described
Ratio and be adjusted, the size of described second reference voltage is to be more than according to reverse voltage signal described in described specific period
The ratio of described second reference voltage and be adjusted.
4. current signal detection method as claimed in claim 3, it is characterised in that when described positive electricity in described specific period
When pressure signal is more than first marginal value more than the ratio of described first reference voltage, improve the big of described first reference voltage
Little, and it is critical less than one second more than the ratio of described first reference voltage to work as described positive phase voltage signal in described specific period
During value, reduce the size of described first reference voltage.
5. current signal detection method as claimed in claim 3, it is characterised in that when anti-phase electricity described in described specific period
When pressure signal is more than three marginal value more than the ratio of described second reference voltage, improve the big of described second reference voltage
Little, and it is critical less than one the 4th more than the ratio of described second reference voltage to work as described reverse voltage signal in described specific period
During value, reduce the size of described second reference voltage.
6. current signal detection method as claimed in claim 1, it is characterised in that also include:
A half-wave signal modulating method is being used, to produce described modulation by electricity module described in described inductive power-supply supply device
Signal；And
The described current signal corresponding to described modulated signal is produced at described power coil, and according to the electricity of described power coil
Flow path direction, divides into a positive half cycle current signal and a negative half-cycle current signal by described current signal.
7. current signal detection method as claimed in claim 6, it is characterised in that resolve described current signal described to take out
The described of inductive power-supply supply device is included by the step of described modulated signal produced by electricity module:
Described modulated signal is taken out by the variable quantity difference of described positive half cycle current signal Yu described negative half-cycle current signal.
8. for a supply module for inductive power-supply supply device, including:
One power coil；
One resonant capacitance；
One current detection component, is serially connected between described power coil and described resonant capacitance, is used for obtaining corresponding to described confession
One current signal of the electric current of electric coil；
One control unit, is coupled to described current detection component, is used for resolving described current signal, to take out described vicarious electricity
The one of source supply is subject to a modulated signal produced by electricity module；And
One signal interpretation circuit, including:
One first amplifier and one second amplifier, be used for the part and by corresponding to a forward current in described current signal
The part of reverse current is amplified respectively, and is respectively converted into positive phase voltage signal and a reverse voltage signal；
One first level generator and one second level generator, be respectively intended to set one first reference voltage and one second reference
Voltage；
One positive half cycle comparator, is used for relatively described positive phase voltage signal and described first reference voltage, to produce described modulation
One positive half period part of signal；And
One negative half period comparator, is used for relatively described reverse voltage signal and described second reference voltage, to produce described modulation
One negative half cycle portion of signal.
9. supply module as claimed in claim 8, it is characterised in that described control unit take out described modulated signal with
Before, described current signal is not filtered.
10. supply module as claimed in claim 8, it is characterised in that the size of described first reference voltage is according to described
By described positive phase voltage signal in the specific period of electricity module unmodulated signal more than the ratio of described first reference voltage
Being adjusted, the size of described second reference voltage is more than described the according to reverse voltage signal described in described specific period
The ratio of two reference voltages and be adjusted.
11. supply modules as claimed in claim 10, it is characterised in that when positive phase voltage signal described in described specific period
When being more than first marginal value more than the ratio of described first reference voltage, improve the size of described first reference voltage, and work as
When in described specific period, described positive phase voltage signal is less than second marginal value more than the ratio of described first reference voltage, fall
The size of low described first reference voltage.
12. supply modules as claimed in claim 10, it is characterised in that when reverse voltage signal described in described specific period
When being more than three marginal value more than the ratio of described second reference voltage, improve the size of described second reference voltage, and work as
When in described specific period, described reverse voltage signal is less than four marginal value more than the ratio of described second reference voltage, fall
The size of low described second reference voltage.
13. supply modules as claimed in claim 8, it is characterised in that the described of described inductive power-supply supply device is subject to electricity mould
Block uses half-wave voltage signal modulator approach, to produce described modulated signal.
14. supply modules as claimed in claim 13, it is characterised in that described supply module produces corresponding to described modulation letter
Number described current signal, described control unit the sense of current according to described power coil, described current signal is distinguished
It is a positive half cycle current signal and a negative half-cycle current signal.
15. supply modules as claimed in claim 14, it is characterised in that described control unit is believed by described positive half cycle current
Number take out described modulated signal with the variable quantity difference of described negative half-cycle current signal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW103100707A TWI481144B (en) | 2014-01-08 | 2014-01-08 | Method of sensing current signal for supplying-end module of induction type power supply system |
| TW103100707 | 2014-01-08 | ||
| CN201410049320.6A CN103887895B (en) | 2014-01-08 | 2014-02-12 | Power supply module for induction type power supply and current signal detection method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410049320.6A Division CN103887895B (en) | 2014-01-08 | 2014-02-12 | Power supply module for induction type power supply and current signal detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105958663A true CN105958663A (en) | 2016-09-21 |
| CN105958663B CN105958663B (en) | 2018-07-13 |
Family
ID=50956653
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410049320.6A Active CN103887895B (en) | 2014-01-08 | 2014-02-12 | Power supply module for induction type power supply and current signal detection method |
| CN201610332966.4A Active CN105958663B (en) | 2014-01-08 | 2014-02-12 | Power supply module for induction type power supply and current signal detection method |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410049320.6A Active CN103887895B (en) | 2014-01-08 | 2014-02-12 | Power supply module for induction type power supply and current signal detection method |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN103887895B (en) |
| TW (1) | TWI481144B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565976A (en) * | 2018-02-12 | 2018-09-21 | 富达通科技股份有限公司 | Power supply module of induction type power supply system and signal detection method thereof |
| CN110365121A (en) * | 2018-04-09 | 2019-10-22 | 恩智浦美国有限公司 | Power transmitter unit |
| CN111263890A (en) * | 2017-06-26 | 2020-06-09 | 瓦提利提公司 | Inductive supply current monitoring |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9413197B2 (en) | 2010-05-31 | 2016-08-09 | Fu Da Tong Technology Co., Ltd. | Inductive power supply system and intruding metal detection method thereof |
| US9831687B2 (en) | 2011-02-01 | 2017-11-28 | Fu Da Tong Technology Co., Ltd. | Supplying-end module for induction-type power supply system and signal analysis circuit therein |
| US10673287B2 (en) | 2011-02-01 | 2020-06-02 | Fu Da Tong Technology Co., Ltd. | Method and supplying-end module for detecting receiving-end module |
| US10056944B2 (en) | 2011-02-01 | 2018-08-21 | Fu Da Tong Technology Co., Ltd. | Data determination method for supplying-end module of induction type power supply system and related supplying-end module |
| US9600021B2 (en) | 2011-02-01 | 2017-03-21 | Fu Da Tong Technology Co., Ltd. | Operating clock synchronization adjusting method for induction type power supply system |
| US10574095B2 (en) | 2011-02-01 | 2020-02-25 | Fu Da Tong Technology Co., Ltd. | Decoding method for signal processing circuit and signal processing circuit using the same |
| US10038338B2 (en) | 2011-02-01 | 2018-07-31 | Fu Da Tong Technology Co., Ltd. | Signal modulation method and signal rectification and modulation device |
| US9671444B2 (en) | 2011-02-01 | 2017-06-06 | Fu Da Tong Technology Co., Ltd. | Current signal sensing method for supplying-end module of induction type power supply system |
| US9628147B2 (en) | 2011-02-01 | 2017-04-18 | Fu Da Tong Technology Co., Ltd. | Method of automatically adjusting determination voltage and voltage adjusting device thereof |
| US10587153B2 (en) | 2011-02-01 | 2020-03-10 | Fu Da Tong Technology Co., Ltd. | Intruding metal detection method for induction type power supply system and related supplying-end module |
| TWI524622B (en) * | 2014-06-06 | 2016-03-01 | 富達通科技股份有限公司 | Supplying-end module of induction type power supply system and method of determining data thereof |
| US10630116B2 (en) | 2011-02-01 | 2020-04-21 | Fu Da Tong Technology Co., Ltd. | Intruding metal detection method for induction type power supply system and related supplying-end module |
| TWI655824B (en) * | 2018-04-18 | 2019-04-01 | 富達通科技股份有限公司 | Metal foreign matter detecting method of inductive power supply and power supply module thereof |
| DE102015111664A1 (en) * | 2014-07-23 | 2016-01-28 | Visteon Global Technologies, Inc. | Determining a reconfiguration of a wireless area with a multi-coil system |
| RU2692482C2 (en) * | 2014-09-16 | 2019-06-25 | Конинклейке Филипс Н.В. | Wireless inductive power transmission |
| CN106936223A (en) * | 2015-12-31 | 2017-07-07 | 中惠创智无线供电技术有限公司 | The wireless power supply system being powered to small-power electrical equipment |
| TWI637413B (en) | 2018-01-04 | 2018-10-01 | 富達通科技股份有限公司 | Induction type power supply system and coil module thereof |
| CN111313492A (en) * | 2019-11-27 | 2020-06-19 | 邢益涛 | Modular wireless charging system |
| CN113036830B (en) * | 2019-12-25 | 2023-09-26 | 圣邦微电子（北京）股份有限公司 | Detection control circuit and control method based on wireless charging |
| CN113258627B (en) * | 2020-02-12 | 2024-09-03 | 北京小米移动软件有限公司 | Reverse charging method, device, terminal and storage medium |
| CN114899893B (en) * | 2022-05-12 | 2023-10-27 | 深圳市拓普联科技术股份有限公司 | Power line communication module, power line communication device, power line communication method, power line communication system and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006060909A (en) * | 2004-08-19 | 2006-03-02 | Seiko Epson Corp | Noncontact power transmitter |
| CN102983638A (en) * | 2012-11-01 | 2013-03-20 | 重庆大学 | Voltage-type wireless power supply system load identification method |
| CN103457361A (en) * | 2012-05-28 | 2013-12-18 | 富达通科技股份有限公司 | Device for controlling synchronous rectification switch to transmit data in inductive power supply unit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4600470B2 (en) * | 2007-02-20 | 2010-12-15 | セイコーエプソン株式会社 | Power transmission control device, power transmission device, electronic device, and non-contact power transmission system |
| WO2009149464A2 (en) * | 2008-06-06 | 2009-12-10 | University Of Florida Research Foundation, Inc. | Method and apparatus for contactless power transfer |
| CN101834473B (en) * | 2010-05-21 | 2012-05-09 | 西安电子科技大学 | Resonant tracking non-contact power supply device and power supply method |
| TWI429165B (en) * | 2011-02-01 | 2014-03-01 | Fu Da Tong Technology Co Ltd | Method of data transmission in high power |
| TWI472897B (en) * | 2013-05-03 | 2015-02-11 | Fu Da Tong Technology Co Ltd | Method and Device of Automatically Adjusting Determination Voltage And Induction Type Power Supply System Thereof |
| CN102904475B (en) * | 2011-09-20 | 2015-01-21 | 富达通科技股份有限公司 | Inductive power supply and detection method of metallic foreign body thereof |
-
2014
- 2014-01-08 TW TW103100707A patent/TWI481144B/en active
- 2014-02-12 CN CN201410049320.6A patent/CN103887895B/en active Active
- 2014-02-12 CN CN201610332966.4A patent/CN105958663B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006060909A (en) * | 2004-08-19 | 2006-03-02 | Seiko Epson Corp | Noncontact power transmitter |
| CN103457361A (en) * | 2012-05-28 | 2013-12-18 | 富达通科技股份有限公司 | Device for controlling synchronous rectification switch to transmit data in inductive power supply unit |
| CN102983638A (en) * | 2012-11-01 | 2013-03-20 | 重庆大学 | Voltage-type wireless power supply system load identification method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111263890A (en) * | 2017-06-26 | 2020-06-09 | 瓦提利提公司 | Inductive supply current monitoring |
| CN108565976A (en) * | 2018-02-12 | 2018-09-21 | 富达通科技股份有限公司 | Power supply module of induction type power supply system and signal detection method thereof |
| CN108565976B (en) * | 2018-02-12 | 2021-11-02 | 富达通科技股份有限公司 | Power supply module of induction type power supply system and signal detection method thereof |
| CN110365121A (en) * | 2018-04-09 | 2019-10-22 | 恩智浦美国有限公司 | Power transmitter unit |
| CN110365121B (en) * | 2018-04-09 | 2024-04-05 | 恩智浦美国有限公司 | Power transmitter unit |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI481144B (en) | 2015-04-11 |
| CN105958663B (en) | 2018-07-13 |
| CN103887895B (en) | 2017-01-18 |
| CN103887895A (en) | 2014-06-25 |
| TW201417445A (en) | 2014-05-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105958663A (en) | Power supply module for induction type power supply and current signal detection method | |
| US9154002B2 (en) | Systems and methods for detecting data communication over a wireless power link | |
| CN103425169A (en) | Method for automatically adjusting voltage level and voltage level adjusting device | |
| CN102798787A (en) | Electronic equipment and circuit breaking detection system and circuit breaking detection method thereof | |
| CN102353825A (en) | Resistor sampling isolation current detection circuit | |
| CN102114307B (en) | Defibrillation electrode identification method and defibrillation system | |
| CN106226697A (en) | A kind of electric vehicle motor integrated test system for performance | |
| CN105450054A (en) | PFC (power factor correction) circuit with built-in auxiliary power circuit, and control method and device for PFC circuit | |
| US9671444B2 (en) | Current signal sensing method for supplying-end module of induction type power supply system | |
| CN104698316B (en) | Connection status detection circuit, internal resistance of cell detection means, cell tester | |
| CN202083763U (en) | Electronic device and broken circuit detecting system thereof | |
| CN105045330B (en) | Power supply module in induction type power supply and signal analysis circuit thereof | |
| CN104124781B (en) | Power supply module of induction type power supply and data interpretation method thereof | |
| CN211089621U (en) | Digital processing circuit for output signal of coil type electromagnetic induction sensor | |
| EP1553567A3 (en) | Wobble-signal extracting circuit and optical disk drive | |
| CN208313847U (en) | A kind of detector circuit for piston cleanliness detection | |
| CN201292889Y (en) | Crankshaft signal processor | |
| TWI301205B (en) | System for detecting electric power in battery and hand-held electronic apparatus thereof | |
| CN105553427B (en) | AC coupled amplifying circuit | |
| CN103792584B (en) | Engine commutator metal reinforced circle detector and detection method thereof and application apparatus | |
| CN2924536Y (en) | Front processor of engine reluctance type rotating speed sensor | |
| CN210444248U (en) | Control guide circuit of alternating-current charging pile | |
| CN103293837A (en) | Rotating speed signal producing module, projection device and color wheel rotating speed control method of projection device | |
| CN101685111A (en) | Novel zero crossing detection circuit | |
| CN216052221U (en) | Self-adaptive amplifying circuit for induction logging signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |