CN106655532B - Power supply module of induction type power supply and output power adjusting method thereof - Google Patents
Power supply module of induction type power supply and output power adjusting method thereof Download PDFInfo
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Abstract
The invention discloses a method for a power supply module of an induction type power supply and the power supply module thereof, which are used for adjusting the output power of the induction type power supply, and the method comprises the steps of driving a power supply coil of the power supply module to operate by a first driving signal and a second driving signal, and setting a phase shift amount between the first driving signal and the second driving signal; detecting a coil signal of the power supply coil to judge a peak position in the coil signal; judging a peak deviation rate of the peak position according to a signal period starting point and an empty load point of the second driving signal; and adjusting the phase shift amount according to the peak shift rate, thereby adjusting the output power.
Description
Technical field
The present invention relates to a kind of methods for inductive power-supply supply device more particularly to one kind to supply in inductive power supply
Answer the method that output power adjusting is carried out in device.
Background technique
Inductive power-supply supply device includes feeder ear and receiving end, and feeder ear pushes power supply coil to generate by driving circuit
Resonance, and then radio frequency electromagnetic is issued, then carry out electrical conversion after receiving electromagnetic wave energy by the coil of receiving end, to generate
DC power supply is supplied to the load device of receiving end.In general, the mode of full-bridge driving or half-bridge driven can be used in feeder ear
It operates, the driving assembly that full-bridge driving represents coil front end exports two driving signals to coil both ends, and half-bridge driven represents drive
Dynamic component only exports a driving signal to one end of coil, and the other end of coil is then grounded or receives constant voltage.
In general, when carrying out full-bridge driving, it is anti-each other for being respectively outputted to two driving signals at power supply coil both ends
The square wave of phase.It in this case, can be by adjusting driving when the feeder ear of inductive power-supply supply device power control to be carried out
The operating frequency of signal changes operating point.Referring to FIG. 1, Fig. 1 is showing for the coil resonance curve of inductive power-supply supply device
It is intended to.As shown in Figure 1, coil resonance curve is the string wave-amplitude of coil signal and the corresponding relationship of frequency when coil operates,
In, coil resonance curve includes a largest chord wave-amplitude Amax, with maximum output power and corresponds to a working frequency
F0 often controls working frequency in the position for being greater than F0 in practice in order to avoid output power crosses the damage of ambassador's system overload,
Such as F1~F4 of Fig. 1, string wave-amplitude A1~A4 is corresponded respectively to.
It can be seen from the above, when coil running is in lower working frequency, exportable biggish power；When coil running exists
When higher working frequency, exportable lesser power.Therefore, when the load of inductive power-supply supply device is unloaded, controllably
Coil manipulation processed is pushed at higher working frequency (such as F4) with using lower output power (lower string wave-amplitude A4)
Load, avoids extra power consumption.It, can be by working frequency gradually when the load increase of receiving end so that power demand improves
It is reduced to F3, F2 or F1, pushes load to improve string wave-amplitude/output power.The process of above-mentioned adjustment working frequency is logical
The communication between receiving end and feeder ear is crossed to carry out, for example, signal modulation can be passed through when receiving end detects load and increases
Related data is transmitted to feeder ear by technology, and feeder ear can improve power after obtaining data.When feeder ear adjustment power finish with
Afterwards, receiving end judges whether current power is enough to drive existing load, if power is still insufficient, receiving end can transmit information again
To feeder ear, further to notify feeder ear to increase output power.In other words, when the load, the adjustment of power often without
Method one-time-reach-place, need to be by that for several times after data exchange, can be adjusted to most suitable output between feeder ear and receiving end
Watt level.Therefore, aforesaid way often takes considerable time, and haves the shortcomings that output voltage stability is bad.
Referring to FIG. 2, Fig. 2 is that receiving end loads the signal waveforms in increased situation.It is one defeated to draw receiving end by Fig. 2
The waveform of voltage Vout and the coil signal Vc in power supply coil out.Firstly, receiving end load in underloading or zero load
Situation, output voltage Vout maintains a predetermined voltage at this time and the amplitude of coil signal Vc oscillation is smaller.In time t0, burst
Property load occur declining output voltage Vout moment, as load caused by resonance effect, the amplitude meeting of coil signal Vc
Moment improves.When receiving end detects load variation (such as detecting by output voltage Vout), feeder ear is not yet learnt
This information and output power can not be improved immediately.At this point, receiving end can the data of output voltage Vout be modulated/be encoded with
After be transmitted to feeder ear (time t1), feeder ear is after receiving the modulation data from receiving end, then adjusts coil
Working frequency is changed with improving output power in response to load.However, the promotion of output power at this time still fails to make output electricity
Pressure Vout returns to predetermined voltage, and therefore, receiving end persistently transmit the related data of instruction raising output power to the feeder ear (time
T2, t3), feeder ear simultaneously steps up output power, until output voltage Vout reaches predetermined voltage.In general, by
Periodically to transmit in modulation data, output power adjustment need to the transmission cycle Jing Guo several modulated signals can just make to export
Voltage Vout returns to predetermined voltage.
In addition, if the biggish square wave driving letter of amplitude need to be passed through when inductive power-supply supply device is intended to drive bigger load
Number generate bigger coil string wave-amplitude, and biggish drive signal amplitude translates up coil resonance curve.It please join
Fig. 3 is examined, Fig. 3 is the schematic diagram of the coil resonance curve in inductive power-supply supply device under the driving signal of different voltages amplitude.
Fig. 3 draws the case where voltage of driving signal is 5V and 24V.The two in comparison, can when the voltage of driving signal is 24V
Realize bigger output power.In this case, when inductive power-supply supply device is in standby (i.e. load is zero load),
Biggish driving signal often generates more virtual works, so that the situation of output power waste is more serious, unless its running exists
Higher working frequency.However, being limited to the performance of driving assembly, the frequency of driving signal certainly exists the upper limit, and higher
Working frequency mean more frequent switch between components, cause the rate of Module Dissipation to improve and reduce assembly life-span.
In consideration of it, it is really necessary to propose another power regulating method that can be used for inductive power-supply supply device, to realize
Quick power regulation, while avoiding disadvantages mentioned above.
Summary of the invention
Therefore, the main object of the present invention is that output power can be carried out in inductive power-supply supply device by providing one kind
The method of adjusting and its power supply module of inductive power-supply supply device, to realize quick power regulation, while reducing induction type
Power loss of the power supply unit under standby mode.
The invention discloses a kind of methods of a power supply module for an inductive power-supply supply device, for adjusting the sense
Answer an output power of formula power supply unit, this method includes to drive this with one first driving signal and one second driving signal
One power supply coil of power supply module operates, and sets the phase-shift phase between first driving signal and second driving signal；
A coil signal of the power supply coil is detected, to judge the crest location in the coil signal；According to second driving signal
A signal period starting point and a no-load point, judge a wave crest deviation ratio of the crest location；And according to the wave crest deviation ratio,
The phase-shift phase is adjusted, and then adjusts the output power.
The invention also discloses a kind of power supply modules, are used for an inductive power-supply supply device, for adjusting induction type electricity
One output power of source power supply unit.The power supply module includes a power supply coil, at least one for electric drive unit, a delay generation
Device, a wave crest detector and a processor.This at least one is coupled to the power supply coil for electric drive unit, can be used to send one
One driving signal and one second driving signal drive the power supply coil to operate.The delay generator is coupled at least one power supply
In driving unit one for electric drive unit, for generating a postpones signal and exporting the postpones signal to this for electric drive list
Member.The wave crest detector is coupled to the power supply coil, for detecting a coil signal of the power supply coil, to obtain coil letter
A wave crest signal in number.The processor be coupled to this at least one for electric drive unit, the delay generator and the wave crest detect
Device, for executing following steps: control the delay generator and export the postpones signal, with set first driving signal and this
A phase-shift phase between two driving signal；The wave crest signal is obtained from the wave crest detector, and is judged in the coil signal accordingly
A crest location；According to a signal period starting point of second driving signal and a no-load point, the one of the crest location is judged
Wave crest deviation ratio；And according to the wave crest deviation ratio, the phase-shift phase is adjusted, and then adjust the output power.
Detailed description of the invention
Fig. 1 is the schematic diagram of the coil resonance curve of inductive power-supply supply device.
Fig. 2 is that receiving end loads the signal waveforms in increased situation.
Fig. 3 is the signal of the coil resonance curve in inductive power-supply supply device under the driving signal of different voltages amplitude
Figure.
Fig. 4 is the schematic diagram of one inductive power-supply supply device of the embodiment of the present invention.
Fig. 5 A~5C is wave corresponding to different loads in the case that the phase-shift phase of driving signal of the embodiment of the present invention is zero
The waveform diagram of peak deviation ratio.
Fig. 6 is the output work that the embodiment of the present invention adjusts inductive power-supply supply device by the phase shift of driving signal
The waveform diagram of rate.
Output power is adjusted by the phase shift of driving signal when Fig. 7 is the load down of inductive power-supply supply device
Waveform diagram.
Fig. 8 is the signal waveforms for increasing power output when the load of receiving end of the embodiment of the present invention increases.
Fig. 9 is the flow chart of one power regulation process of the embodiment of the present invention.
Figure 10 is the flow chart of one power regulation detailed process of the embodiment of the present invention.
Wherein, the reference numerals are as follows:
F0~F4 working frequency
Amax largest chord wave-amplitude
A1~A4 string wave-amplitude
Vout output voltage
Vc coil signal
T0, t1, t2, t3 resonant capacitance
400 inductive power-supply supply devices
1 power supply module
111 processors
112 clock generators
113 delay generators
114A, 114B are for electric drive unit
115 resonant capacitances
116 power supply coils
117 magnetic conductors
130 bleeder circuits
133,134 divider resistance
140 wave crest detectors
141 comparators
151 digital analog converters
S1, S2 control signal
S2 ' postpones signal
D1, D2 driving signal
C1 coil signal
P1 wave crest signal
CR1~CR4 comparison result
Vref reference voltage level
2 by electric module
21 load units
216 power receiving coils
217 magnetic conductors
90 power regulation processes
900~910 steps
100 power regulation detailed process
1000~1010 steps
Specific embodiment
Referring to FIG. 4, Fig. 4 is the schematic diagram of one inductive power-supply supply device 400 of the embodiment of the present invention.As shown in figure 4, sense
Answering formula power supply unit 400 includes a power supply module 1 and one by electric module 2.Power supply module 1 includes a power supply coil 116 and one
Resonant capacitance 115.Wherein, power supply coil 116 can be used to send electromagnetic energy to by electric module 2 to be powered, resonant capacitance
115 are coupled to power supply coil 116, can be used to the progress resonance of power supply coil 116 of arranging in pairs or groups.In addition, may be selected in power supply module 1
Property the magnetic conductor 117 that is constituted using magnetic material kept away simultaneously for promoting the electromagnetic induction ability of power supply coil 116
Exempting from electromagnetic energy influences the object in coil non-inductive face direction.
For the running of control power supply coil 116 and resonant capacitance 115, power supply module 1 is also comprising a processor 111, a period of time
Clock generator 112, one postpones generator 113, detects for electric drive unit 114A and 114B, a bleeder circuit 130 and a wave crest
Device 140.It is coupled to power supply coil 116 and resonant capacitance 115 for electric drive unit 114A and 114B, driving signal can be sent respectively
D1 and D2 is to power supply coil 116, for driving power supply coil 116 to operate.It can receive processing for electric drive unit 114A and 114B
The control of device 111 and clock generator 112, to drive power supply coil 116 to generate and send energy.For electric drive unit 114A
And both 114B can carry out full-bridge driving simultaneously when operating.Clock generator 112 be coupled to for electric drive unit 114A and
114B, exportable control signal S1 and S2, be respectively intended to control for electric drive unit 114A and 114B send driving signal D1 and
D2.Clock generator 112 can be a pulse width modulation generator (Pulse Width Modulation generator,
PWM generator) or other types of clock generator, for export clock signal to for electric drive unit 114A and
114B.Delay generator 113 is coupled to clock generator 112 and for can be used to postpone control between electric drive unit 114B
Postpones signal S2 ' is output to for electric drive unit 114B by signal S2 with generating a postpones signal S2 '.Postpone generator 113
Optionally the postpones signal S2 ' of output delay different time length, delay time can be controlled by processor 111.?
In one embodiment, delay generator 113 may include the delay chain (delay chain) being made of multiple phase inverters, but unlimited
In this.Bleeder circuit 130 includes divider resistance 133 and 134, can be declined to the coil signal C1 in power supply coil 116
After subtracting, it is output to processor 111 and wave crest detector 140, wherein coil signal C1 is power supply coil 116 and resonance
Voltage signal between capacitor 115.In some embodiments, if the circuits such as processor 111 and wave crest detector 140 have enough
Pressure resistance, can not also use bleeder circuit 130, the coil signal in power supply coil 116 is directly received by wave crest detector 140
C1.Wave crest detector 140 is coupled to power supply coil 116, can be used to the coil signal C1 for detecting power supply coil 116, to obtain line
A crest location in ring signal C1.Processor 111 be coupled to for electric drive unit 114A and 114B, delay generator 113 and
The devices such as wave crest detector 140 can control every running in power supply module 1, and adjust the output power of power supply module 1.As for
Other possible composition components or module, such as power supply unit, display unit, visible system demand and increase or decrease, therefore
Under the explanation for not influencing the present embodiment, do not show slightly.
Please continue to refer to Fig. 4.Included a power receiving coil 216 by electric module 2, can be used to the confession for receiving power supply coil 116
Electricity.In by electric module 2, the magnetic conductor 217 also optionally constituted using magnetic material, to promote power receiving coil
216 electromagnetic induction ability, while avoiding the object in electromagnetic energy influence coil non-inductive face direction.Power receiving coil 216 simultaneously will
Load unit 21 of the power transmission received to rear end.In by electric module 2, other possible composition components or module, such as
Voltage regulator circuit, resonant capacitance, rectification circuit, signal feedback circuit, receiving end processor etc., visible system demand and increase and add deduct
It is few, therefore under the explanation for not influencing the present embodiment, do not show slightly.
In one embodiment, wave crest detector 140 includes a comparator 141 and a digital analog converter (Digital
To Analog Converter, DAC) 151, it can be used to the crest location for detecting coil signal C1.Processor 111 can set one
Reference voltage Vref, and export and correspond to a digital value of reference voltage Vref and arrive digital analog converter 151, digital simulation turn
The digital value is converted to reference voltage Vref again by parallel operation 151.Then, comparator 141 may compare coil signal C1 and with reference to electricity
The size for pressing Vref, to export a wave crest signal P1, and is transmitted to processor for wave crest signal P1.More particularly, with reference to electricity
Pressure Vref may be set to the numerical value of the peak value size of slightly below coil signal C1, therefore, in the wave crest letter that comparator 141 is exported
In number P1, the crest location of coil signal C1 will appear a pulse signal.Then, processor 111 can will be in pulse signal
Between point be judged as the crest location of coil signal C1.It is relevant to processor 111 and obtains coil signal C1's according to pulse signal
The Detailed Operation mode of crest location is recorded in Taiwan Patent publication TW 201519554A.In simple terms, processor 111 can
By a timer come the time point of the upper limb of recording pulse signal and lower edge, and the middle time point of pulse signal is calculated,
It is considered as the crest location of coil signal C1.Taiwan Patent publication TW 201519554A is that Taiwan is special with difference of the invention
Sharp publication TW 201519554A is constant voltage to be provided using capacitor as the reference voltage, and the present invention uses processor 111
Set reference voltage Vref, and its analog voltage is exported by digital analog converter 151, according to mode of the invention
Set reference voltage Vref numerical value has high accuracy, it can be achieved that more accurately crest location judgement.
Then, processor 111 can control prolonging for delay the exported postpones signal S2 ' of generator 113 according to crest location
The slow time, to set the phase-shift phase for electric drive unit 114A and 114B the driving signal D1 and D2 exported.Different from existing
There is technology all to generate the driving signal of complete reverse phase using not delayed control signal, the present invention can be by postponing generator
113 are postponed, so that for electric drive unit 114A and 114B the driving signal D1 and D2 exported and non-fully reverse phase, and
There are certain phase offsets.In general, when driving signal D1 and D2 are the square-wave signal of complete reverse phase, it can reach highest
Output power；Phase offset if it exists can make the reduced capability of driving signal D1 and D2 driving power supply coil 116, make to export
Power reduces.By the control of the delay time to delay generator 113, the phase of driving signal D1 and D2 is can be changed in the present invention
Relationship, and then reach effective output power and adjust.In this instance, phase-shift phase represents phase shift amplitude size.Implement one
In example, can define the phase-shift phase of driving signal D1 and D2 when being the square-wave signal of complete reverse phase is zero, identical working frequency it
Under, the output power of power supply module 1 is maximum when phase-shift phase is equal to zero；In addition, if the delay time of postpones signal S2 ' it is bigger, table
Show that driving signal D1 and D2 more deviate reverse phase, represents that phase-shift phase is bigger, the output power of power supply module 1 is smaller at this time.It is real one
It applies in example, the upper limit value of phase-shift phase can be set, it is too low to avoid the excessive driving capability for making driving signal D1 and D2 of phase-shift phase
Or because caused by driving signal D1 and D2 over-deflection system it is unstable.For example, the upper limit value of phase-shift phase may be set to drive
The length (i.e. the phase difference of driving signal D1 and D2 be equal to 90 degree) in a quarter period of signal D1 and D2, at this time power supply module
1 output power is minimum.
Further, when processor 111 obtains wave crest signal P1 from wave crest detector 140, and judge coil signal C1
Crest location after, can judge a wave of crest location according to a signal period starting point of driving signal D2 and a no-load point
Peak deviation ratio, wherein the signal period starting point of driving signal D2 may be set to the position of the clock upper limb of driving signal D2.According to
The characteristic of inductive power-supply supply device, (the i.e. driving signal D1 and D2 in the case where the phase-shift phase of driving signal D1 and D2 are zero
For the square-wave signal of complete reverse phase), when the load of inductive power-supply supply device is unloaded, crest location is located at driving signal D2
Signal period starting point the rear a quarter period position, this position may be defined as no-load point.Work as inductive power-supply supply
When the load of device gradually increases, crest location can be gradually moved forward from no-load point, and tend to the signal period of driving signal D2
Starting point.When the load of inductive power-supply supply device reaches full load, crest location can be reached from the signal period of driving signal D2
Point.The present invention can be according to the characteristic of above-mentioned inductive power-supply supply device, to judge the size of wave crest deviation ratio, that is, when wave crest position
When setting in no-load point, wave crest deviation ratio is equal to zero；When crest location is located at the signal period starting point of driving signal D2, wave crest
Deviation ratio is equal to absolutely.In the case where inductive power-supply supply device does not overload, crest location can be in no-load point and signal
It is moved between cycle starting point, therefore, wave crest deviation ratio can be moved zero between a hundred percent.More particularly, wave crest deviates
The numerical value of rate be crest location at a distance from no-load point divided by signal period starting point at a distance from no-load point.
Fig. 5 A~5C is please referred to, Fig. 5 A~5C is the case where phase-shift phase of driving signal of the embodiment of the present invention D1 and D2 are zero
The waveform diagram of wave crest deviation ratio corresponding to lower different loads.Fig. 5 A~5C draw coil signal C1, driving signal D1 and D2 with
And the waveform of wave crest signal P1, wherein Fig. 5 A, Fig. 5 B and Fig. 5 C draw that inductive power-supply supply device is non-loaded, has load respectively
And fully loaded situation.As shown in Figure 5A, when the load of inductive power-supply supply device is unloaded, crest location is located at driving signal
The position in the signal period starting point rear a quarter period of D2, i.e., above-mentioned no-load point, wave crest deviation ratio is equal to zero at this time.Wave crest
Signal P1 then generates the pulse signal corresponding to crest location, and the intermediate point of each pulse signal can correspond to each harmonic period
Interior crest location.As shown in Figure 5 B, when inductive power-supply supply device loads, letter of the crest location to driving signal D2
Number cycle starting point is close, and wave crest deviation ratio is located at zero between a hundred percent at this time.As shown in Figure 5 C, work as inductive power-supply supply
The load of device is full load, and crest location is located at the signal period starting point of driving signal D2, and wave crest deviation ratio is equal to percentage at this time
Hundred.It is noted that inductive power-supply supply device can be operated in different operating frequency in the case where different loads size,
In this case, the signal period length of driving signal D2 is also different, and the absolute position of no-load point is not also identical.Cause
This, wave crest deviation ratio is carried out according to the relative position of the signal period starting point of crest location and driving signal D2 and no-load point
It calculates, rather than is calculated according to absolute position, because being influenced without being changed by working frequency.
As described above, the present invention can adjust output power by changing the phase relation of driving signal D1 and D2, and wave
Peak deviation ratio can be used to judge payload size, and therefore, processor 111 can adjust driving letter according to calculated wave crest deviation ratio
The time span that the phase-shift phase of number D1 and D2, i.e. adjustment delay generator 113 postpone driving signal D2.In this way,
111 adjustable output power of processor in response to load to change.
Referring to FIG. 6, Fig. 6 is that the embodiment of the present invention adjusts induction type electricity by the phase shift of driving signal D1 and D2
The waveform diagram of the output power of source power supply unit.Fig. 6 draws unloaded situation.It is noted that working as the phase of driving signal D1 and D2
When displacement is dynamic, since driving signal D2 passes through one section of delay time, the signal period starting point of driving signal D2 and corresponding sky
Loading point (i.e. the position in signal period starting point rear a quarter period) also postpones therewith, so that crest location is to the signal period
The direction of starting point is close, and then promotes wave crest deviation ratio, as shown in Figure 6.In this case, even if inductive power-supply supply device
Load be zero load, when the delay time of driving signal D2 is longer, wave crest deviation ratio is also bigger.
It is worth noting that, there is no the need for pushing load in the case that inductive power-supply supply device 400 is in unloaded
It asks, therefore processor 111 can increase the phase-shift phase of driving signal D1 and D2, to reduce output power.In compared to the prior art
By the way of the driving signal of complete reverse phase, the present invention reduces output power by phase shift, can be further reduced function
The waste of rate.In addition, in driving signal D1 and D2 there are in the case where phase shift, due under overall power fan-out capability
Drop, when being intended to push identical payload size, coil working frequency also declines therewith.The decline of coil working frequency is so that induction
The frequency decline of switch between components, can reduce the service life of Module Dissipation and lifting assembly in formula power supply unit 400.
Since wave crest deviation ratio is influenced by payload size and delay time length simultaneously, when loading bigger, wave crest is inclined
Shifting rate is bigger, and when delay time is longer, wave crest deviation ratio is also bigger, and longer delay time corresponds to biggish phase-shift phase
And weaker output power.In this case, processor 111 can set a default wave crest deviation ratio or a default wave crest offset
Range, and by the control of delay time, to adjust the phase-shift phase of driving signal D1 and D2 so that wave crest deviation ratio is adjusted to this
In default wave crest deviation ratio or default wave crest deviation range.For example, when inductive power-supply supply device starts and not yet receives
To when load, processor 111 can adjust the phase-shift phase of driving signal D1 and D2, so that wave crest deviation ratio is located at default wave crest and deviates model
In enclosing.When the signal period starting point that load occurs making crest location to tend to driving signal D2, and wave crest deviation ratio rises and exceeds
When default wave crest deviation range, processor 111 can reduce the delay time length of delay generator 113 to reduce driving signal D1
And the phase-shift phase of D2, and then decline wave crest deviation ratio and return in default wave crest deviation range.At this point, inductive power-supply supply
Device can improve power output with the promotion in response to load.When load reduction makes crest location tend to no-load point, and wave crest deviation ratio
When declining and exceeding default wave crest deviation range, processor 111 can increase the delay time length of delay generator 113 to improve
The phase-shift phase of driving signal D1 and D2, and then increase wave crest deviation ratio and return in default wave crest deviation range.At this point, induction
Formula power supply unit can reduce power output with the decline in response to load.On the other hand, when wave crest deviation ratio maintains default wave
When in peak deviation range, processor 111 then stops adjusting the phase-shift phase of driving signal D1 and D2, that is, uses current phase-shift phase
And delay time loads to drive.
By taking Fig. 6 as an example, default wave crest deviation range can be set in the specific model near 50 percent by processor 111
In enclosing (such as 48%~52%), and wave crest deviation ratio is changed by the adjustment of the phase-shift phase to driving signal D1 and D2, makes it
It falls in default wave crest deviation range.It arranges in pairs or groups shown in Fig. 6 please further refer to Fig. 7, Fig. 7 draws the negative of inductive power-supply supply device
Carry the waveform diagram for adjusting output power when aggravating by the phase shift of driving signal D1 and D2.As shown in fig. 7, adding in load
In the case where weight, processor 111 can adjust the phase-shift phase of driving signal D1 and D2, make it closer to the square wave letter of reverse phase each other
Number, it is maintained in default wave crest deviation range with controlling wave crest deviation ratio.In this case, since driving signal D1 and D2 more connect
Nearly reverse phase square-wave signal, the exportable higher power of inductive power-supply supply device is with the promotion in response to load.
It is worth noting that, the present invention provides a kind of phase tune that can pass through driving signal in inductive power-supply supply device
The whole method to adjust output power.Those skilled in the art, which works as, to modify or change accordingly, and without being limited thereto.Citing
For, in the above-described embodiments, processor 111 can at any time detect crest location, with to detect wave crest deviation ratio super
When presetting wave crest deviation range out, the phase-shift phase of driving signal D1 and D2 are adjusted to change in response to load.In some embodiments,
Processor 111 can be when judging that power supply module receives noise, or receives being passed by electric module by inductive power-supply supply device
When the modulation data sent, stopping is adjusted phase-shift phase.Since noise and modulation data can all change peak value size, and influence
Judgement to crest location.In this case, processor 111 should stop the adjustment of phase-shift phase, and the adjustment to avoid mistake causes
System is unstable.Specifically, the peak value that modulated signal will cause coil signal C1 occurs fluctuating up and down during one section, makes
Crest location can not be obtained in coil sections drive cycle by obtaining processor 111, especially when peak value fluctuates downwards to lower than ginseng
The case where examining voltage Vref.In addition, noise may also cause the peak value of coil signal C1 lower than reference voltage Vref.In this respect
Under, when processor 111 can occur that at least a coil drive period can not obtain crest location during one section, stops adjustment and drive
The phase-shift phase of dynamic signal D1 and D2, to avoid the influence of noise or modulation data.
In the prior art, it when the load of inductive power-supply supply device changes, need to be detected by receiving end
And relevant information is transmitted to feeder ear by modulated signal, then output power is adjusted by feeder ear, and therefore, the tune of output power
It is whole need to the transmission cycle Jing Guo several modulated signals just output voltage can be made to return to predetermined voltage, as shown in Figure 2.In comparison,
Output power adjusting method of the invention can be detected in crest location and wave crest deviation ratio of the feeder ear to coil signal, can
Detecting result is obtained rapidly, and then adjusts the phase-shift phase of driving signal to adjust output power.Therefore, output power of the invention
Adjusting method can promptly change in response to load and output power is adjusted.Referring to FIG. 8, Fig. 8 is the embodiment of the present invention
Receiving end load increases the signal waveforms of power output when increasing.Fig. 8 is drawn by the output voltage Vout of electric module and power supply
The waveform of coil signal C1 on coil.As shown in figure 8, all existing on output voltage Vout and coil signal C1 periodically micro-
Minor swing, this is the modulated signal transmitted by electric module.In this instance, when the paroxysmal load of appearance makes output voltage Vout wink
Between when declining, feeder ear can detect immediately load change and it is corresponding improve output power, so that output voltage Vout is gone up rapidly.
By the waveform of Fig. 8 it is found that the time that output voltage Vout goes back up to predetermined voltage is much smaller than the transmission cycle of modulated signal.
The above-mentioned function mode for adjusting output power about inductive power-supply supply device can be summarized as a power regulation process
90, as shown in Figure 9.Power regulation process 90 can realize in an inductive power-supply supply device feeder ear (in such as Fig. 4 induction type electricity
The power supply module 1 of source power supply unit 400), it includes following steps:
Step 900: starting.
Step 902: driving the power supply coil 116 of power supply module 1 to operate with driving signal D1 and D2, and set driving letter
A phase-shift phase number between D1 and D2.
Step 904: the coil signal C1 of detecting power supply coil 116, to judge the crest location in coil signal C1.
Step 906: according to a signal period starting point of driving signal D2 and a no-load point, judging a wave crest of crest location
Deviation ratio.
Step 908: according to wave crest deviation ratio, adjusting phase-shift phase, and then adjust output power.
Step 910: terminating.
Further, for above-mentioned a power regulation can be summarized as according to wave crest deviation ratio again the step of adjusting phase-shift phase
Detailed process 100, as shown in Figure 10.Power regulation detailed process 100 comprises the steps of:
Step 1000: starting.
Step 1002: one default wave crest deviation range of setting.
Step 1004: judging whether wave crest deviation ratio is greater than, be less than or be located at default wave crest deviation range.If wave crest deviates
When rate is greater than default wave crest deviation range, step 1006 is executed；If wave crest deviation ratio is less than default wave crest deviation range, execute
Step 1008；If wave crest deviation ratio is located in default wave crest deviation range, step 1010 is executed.
Step 1006: reducing phase-shift phase, to improve the thrust of driving signal D1 and D2, and then reduce wave crest deviation ratio.
Step 1008: improving phase-shift phase, to reduce the thrust of driving signal D1 and D2, and then improve wave crest deviation ratio.
Step 1010: terminating.
It is worth noting that, above-mentioned power regulation detailed process 100 can be set at and not receive noise or modulation data
Shi Jinhang.The Detailed Operation mode and other variations of power regulation process 90 and power regulation detailed process 100 can refer to aforementioned
Illustrate, this will not be repeated here.
In conclusion the present invention provides a kind of method that output power adjusting can be carried out in inductive power-supply supply device,
Quick power regulation can be achieved, while reducing power loss of the inductive power-supply supply device under standby mode.Power supply mould
The settable delay generator of block is supplied to for electric drive unit, to change for electric drive unit institute for generating postpones signal
The phase difference of two driving signals of output.When two driving signals are the square waves of reverse phase each other, peak power output can produce.If
Wherein a driving signal is postponed so that two driving signals deviate reverse phase square wave, then output power declines.Pass through delay time
The adjustment of length, adjustable output power of the present invention.In addition, the present invention can detect the signal period of crest location and driving signal
The corresponding relationship of starting point and no-load point, with detecting load variation.When significant change occurs in load, wave crest deviation ratio can be left pre-
If wave crest deviation range.In this case, the delay time that postpones signal can be changed, default wave is returned to control wave crest deviation ratio
In peak deviation range, while output power being adjusted to change in response to load.In this way, the judgement that the present invention passes through crest location
Output power is adjusted, can be substantially improved the rate of power regulation, and phase adjustment come by way of changing output power, it can
The output power of inductive power-supply supply device is reduced, to reduce function of the inductive power-supply supply device under standby mode or zero load
Rate loss.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (15)
1. a kind of method of a power supply module for an inductive power-supply supply device, for adjusting the inductive power-supply supply device
An output power, this method includes:
The power supply coil of the power supply module is driven to operate with one first driving signal and one second driving signal, and setting should
A phase-shift phase between first driving signal and second driving signal；
A coil signal of the power supply coil is detected, to judge the crest location in the coil signal；
According to a signal period starting point of second driving signal and a no-load point, the wave crest offset of the crest location is judged
Rate；And
According to the wave crest deviation ratio, the phase-shift phase is adjusted, and then adjusts the output power.
2. the method as described in claim 1, which is characterized in that from the no-load point is the signal period of second driving signal
The position in the rear a quarter period of point.
3. the method as described in claim 1, which is characterized in that when first driving signal and second driving signal are anti-each other
When mutually and the inductive power-supply supply device is unloaded, which is located at the no-load point, and the wave crest deviation ratio is zero.
4. the method as described in claim 1, which is characterized in that when first driving signal and second driving signal are anti-each other
Mutually and the inductive power-supply supply device is full load, which is located at the signal period starting point of second driving signal,
And the wave crest deviation ratio is absolutely.
5. the method as described in claim 1, which is characterized in that the numerical value of the wave crest deviation ratio is equal to the crest location and the sky
The distance of loading point is divided by the signal period starting point at a distance from the no-load point.
6. the method as described in claim 1, which is characterized in that according to the wave crest deviation ratio, adjust the phase-shift phase, and then adjust
The step of output power, includes:
Set a default wave crest deviation range；
When the wave crest deviation ratio is greater than the default wave crest deviation range, the phase-shift phase is reduced, to improve first driving signal
And the thrust of second driving signal, and then reduce the wave crest deviation ratio；
When the wave crest deviation ratio is less than the default wave crest deviation range, the phase-shift phase is improved, to reduce by first driving signal
And the thrust of second driving signal, and then improve the wave crest deviation ratio；And
When the wave crest deviation ratio is located in the default wave crest deviation range, stop adjusting the phase-shift phase.
7. the method as described in claim 1, which is characterized in that when the power supply module judges that it receives a noise or by the sense
When answering the one of the formula power supply unit data by electric module transfer, stop adjusting the phase-shift phase.
8. a kind of power supply module is used for an inductive power-supply supply device, for adjusting an output of the inductive power-supply supply device
Power, which includes:
One power supply coil；
At least one for electric drive unit, is coupled to the power supply coil, for sending one first driving signal and one second driving letter
Number come drive the power supply coil operate；
One delay generator, be coupled to this at least one for one in electric drive unit for electric drive unit, for generating a delay
Signal simultaneously exports the postpones signal to this for electric drive unit；
One wave crest detector, is coupled to the power supply coil, for detecting a coil signal of the power supply coil, to obtain the coil
A wave crest signal in signal；And
One processor, is coupled to this at least one for electric drive unit, the delay generator and the wave crest detector, for execute with
Lower step:
It controls the delay generator and exports the postpones signal, to set between first driving signal and second driving signal
One phase-shift phase；
The wave crest signal is obtained from the wave crest detector, and judges the crest location in the coil signal accordingly；
According to a signal period starting point of second driving signal and a no-load point, the wave crest offset of the crest location is judged
Rate；And
According to the wave crest deviation ratio, the phase-shift phase is adjusted, and then adjusts the output power.
9. power supply module as claimed in claim 8, which is characterized in that the no-load point is the signal week of second driving signal
The position in the rear a quarter period of phase starting point.
10. power supply module as claimed in claim 8, which is characterized in that when first driving signal and second driving signal
When reverse phase and the inductive power-supply supply device are unloaded each other, which is located at the no-load point, and the wave crest deviation ratio is
Zero.
11. power supply module as claimed in claim 8, which is characterized in that when first driving signal and second driving signal
Reverse phase and the inductive power-supply supply device are full load each other, which is located at the signal period of second driving signal
Starting point, and the wave crest deviation ratio is absolutely.
12. power supply module as claimed in claim 8, which is characterized in that the numerical value of the wave crest deviation ratio is equal to the crest location
With at a distance from the no-load point divided by the signal period starting point at a distance from the no-load point.
13. power supply module as claimed in claim 8, which is characterized in that the processor also executes following steps, according to the wave
Peak deviation ratio adjusts the phase-shift phase, and then adjusts the output power:
Set a default wave crest deviation range；
When the wave crest deviation ratio is greater than the default wave crest deviation range, the phase-shift phase is reduced, to improve first driving signal
And the thrust of second driving signal, and then reduce the wave crest deviation ratio；
When the wave crest deviation ratio is less than the default wave crest deviation range, the phase-shift phase is improved, to reduce by first driving signal
And the thrust of second driving signal, and then improve the wave crest deviation ratio；And
When the wave crest deviation ratio is located in the default wave crest deviation range, stop adjusting the phase-shift phase.
14. power supply module as claimed in claim 8, which is characterized in that when the processor judges that the power supply module receives one
Noise or by the inductive power-supply supply device one by electric module transfer a data when, the processor stop adjust the phase shift
Amount.
15. power supply module as claimed in claim 8, which is characterized in that the postpones signal caused by the delay generator is
It is coupled to this of the delay generator for controlling and exports second driving signal for electric drive unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| TW105127999A TWI580151B (en) | 2016-08-31 | 2016-08-31 | Supplying-end module of induction type power supply system and output power adjustment method thereof |
| TW105127999 | 2016-08-31 |
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| CN106655532A CN106655532A (en) | 2017-05-10 |
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| CN102055250A (en) * | 2009-11-09 | 2011-05-11 | 株式会社丰田自动织机 | Resonance type non-contact charging apparatus |
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Also Published As
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| TW201644150A (en) | 2016-12-16 |
| CN106655532A (en) | 2017-05-10 |
| TWI580151B (en) | 2017-04-21 |
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