CN109510288A - A kind of one-to-many wireless charging system and control method of power adaptive allotment - Google Patents
A kind of one-to-many wireless charging system and control method of power adaptive allotment Download PDFInfo
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- CN109510288A CN109510288A CN201811551118.8A CN201811551118A CN109510288A CN 109510288 A CN109510288 A CN 109510288A CN 201811551118 A CN201811551118 A CN 201811551118A CN 109510288 A CN109510288 A CN 109510288A
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- 238000007600 charging Methods 0.000 title claims abstract description 46
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 241000237858 Gastropoda Species 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
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- 238000001914 filtration Methods 0.000 description 1
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Classifications
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- H02J7/025—
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- H02J5/005—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
Abstract
The invention discloses the one-to-many wireless charging systems and control method of a kind of allotment of power adaptive, the wireless power platform of the system and method deviates the electromagnetic signal of resonance point for detecting target by tranmitting frequency, identify target power, and low standby power is taken into account, different loads corresponds to different variable-currents, by power emission detection unit sampled current value, receiving end configures suitable frequency thus, realize power adaptive allotment, multichannel power emission detection unit is controlled by a chip microcontroller frequency, it is able to achieve the receiving end different to multiple power while carrying out wireless charging, it is that a kind of control is simple, multiple terminals, the wireless charging system and method for wide power span output, realize real power adaptive intelligence wireless charging.
Description
Technical field
The invention belongs to wireless energy transmission technology fields, more particularly to a kind of one-to-many nothing of power adaptive allotment
Line charge electric system and control method.
Background technique
Along with the development of electronic science and technology, the quantity sharp increase of intelligent electronic device, people charge to electricity consumption
Demand is also increasing.Traditional charging modes, which are still, is configured electric energy to suitably directly through adapter by wired mode
Galvanic electricity is equipment charge or power supply by wire transmission, but as increasing for charging equipment certainly will will cause conducting wire and conducting wire
Mutually winding, influences environmental beauty and property easy to use, in addition wired charging modes increase the danger of electric leakage electric shock.Wirelessly
Charging modes can completely avoid various drawbacks of wired charging, current wireless charging system is largely a transmitting terminal
Wireless charging can only be carried out to a receiving end, even if also shifting to an earlier date in the presence of the wireless charging system to multiple reception terminal power supplies
The exclusive charge position of different capacity receiving end is defined, cannot arbitrarily place cannot adaptively be adjusted according to power demand
Match.Therefore there is also technological deficiencies for multiple terminals wireless charging system, and with increasing for wireless charging device, watt level also has difference
Different, to reduce cost and adapting to multiple and different power chargings, power adaptive charging technique just becomes particularly important.
Summary of the invention
The purpose of the present invention is be that solving the one-to-one wireless charging device of the prior art is requiring multiple receiving devices
The limitation shown when charging simultaneously, and to multiple and different power receiving ends when how adaptively to deploy it is different to meet
It receives power and the one-to-many wireless charging system and control method of a kind of power adaptive allotment is provided.
The object of the invention to solve the technical problems is one for adopting the following technical scheme that a kind of power adaptive and deploying
To more wireless charging systems, including transmitting terminal, receiving end；The transmitting terminal can be simultaneously to the receiving end of N number of different capacity load
Mutually independent magnetic resonance coupling formula wireless power transmission is carried out, N is the integer greater than 2；The transmitting terminal includes that sequence connects
The multistage voltage regulator circuit that connects, protection circuit, single-chip microcontroller, and connected by single-chip microcontroller parallel bidirectional temperature sensing circuit, fill
Electricity condition LED indication, the road N power emission detection unit；The multistage voltage regulator circuit provides main electric energy parallel and emits inspection to the road N
Survey unit；The receiving end includes the reception end-coil being linked in sequence, receiving end resonant capacitance, current rectifying and wave filtering circuit, pressure stabilizing mould
Block and load.
Further, the power emission detection unit includes inverter circuit, transmitting terminal resonant capacitance, transmitting end-coil
And current sample amplifying circuit；The single-chip microcontroller output road the N PWM wave drives the road N inverter circuit, current sample amplification one by one
Circuit feeds back to single-chip microcontroller from inverter circuit sampled current value, and then constitutes the closed loop circuit of power adaptive allotment；It is single
Piece machine judges the watt level of current receiving end according to sampled current value and adjusts the PWM wave frequency on the road to adapt to receiving end volume
Fixed charge power；The temperature sensing circuit detects transmitting terminal temperature conditions, if detecting, temperature is more than the temperature pre-seted
Thresholding is spent, single-chip microcontroller, which can immediately turn off PWM output, makes power emitting unit stop power emission；The charged state LED refers to
Show and power supply status instruction, charged state instruction, overtemperature and overcurrent state instruction and foreign matter state instruction are provided, and uses different colours
LED is shown.
Further, N number of transmitting end-coil and N number of reception end-coil, structure respectively have with unit for electrical property parameters
There is high consistency, whole is in the staggered snail winding structure of density, and is supported with FR4 substrate；The FR4 substrate
On dig out M root long through-hole, M is the integer greater than 5, and M root ferrite shielding magnetic stripe is embedded in the M root long through-hole of FR4 substrate；
Parallel face, ferrite magnetic stripe face outwardly N number of transmitting end-coil one by one with N reception end-coil.
The one-to-many wireless power control method of power adaptive allotment, be suitable for wireless transmission platform has not to multiple
Wireless charging, power supply are carried out with the radio receiver for receiving power.Its control process is divided into target detection and power distribution two
A stage；First stage is that transmitting terminal detects receiving end and identifies the charge power of its demand；Second stage is that transmitting terminal exists
After identifying target terminal, working frequency is adjusted to meet receiving end power demand, carries out wireless charging.
The first stage, single-chip microcontroller drives the road N inverter circuit with the road the N PWM wave of off-resonance point, in synchronization
PWM wave all the way is only exported, therefore only power emission detection unit is in detecting state all the way, within a time cycle, the road N
PWM wave recycles output in turn, the road N power emission detection unit cycle detection in turn；It is remaining after certain detects target success all the way
Each road is still in cycle detection state；Judge currently to receive by the Oscillation Amplitude to transmitting terminal current sample amplifying circuit
Hold corresponding bearing power；Every road PWM drive signal is equipped with duty ratio, to achieve the purpose that reduce standby power.
The second stage, single-chip microcontroller judge the size of current of current sample amplifying circuit to calculate current transmitting function
Rate, it is close towards resonance point to adjust PWM wave frequency if power is less than normal, if power off-resonance point bigger than normal, real-time monitoring and adjusts
Control guarantees charging normal table.
In conclusion one-to-many wireless charging system and control method that a kind of power adaptive of the invention is deployed, lead to
Cross the power emitting unit of multidiameter delay, independent current sample and frequency control output, the receiving end in any power bracket
It is its wireless charging that power emitting unit, which can be chosen at random, realizes adaptive allotment.
Compared with prior art, the present invention having the following advantages and beneficial effects:
(1) the present invention provides the one-to-many wireless charging system and control method of a kind of allotment of power adaptive, this is
The electromagnetic signal that system and the wireless power platform of method deviate resonance point by tranmitting frequency identifies target function for detecting target
Rate, and low standby power has been taken into account, different loads corresponds to different variable-currents, samples electricity by power emission detection unit
Receiving end configures suitable frequency to flow valuve thus, realizes power adaptive allotment, multichannel power emission detection unit is by a list
Piece machine realize frequency control, be able to achieve the receiving end different to multiple power while carrying out wireless charging, be it is a kind of control simply,
The wireless charging system and method that multiple terminals, wide power span export, realize real power adaptive wireless charging.
The purpose of the present invention, feature and advantage will make explanation further below referring to attached drawing in conjunction with the embodiments.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of wireless charging system of the present invention.
Fig. 2 is transmitting coil of the present invention and receiving coil structure expanded schematic diagram.
Specific embodiment
As shown in the structural schematic diagram of the wireless charging system of Fig. 1, a kind of one-to-many wireless charging of power adaptive allotment
Electric system, including transmitting terminal 1, receiving end 2；The transmitting terminal 1 can carry out phase to the receiving end 2 of 4 different capacities load simultaneously
Mutual independent magnetic resonance coupling formula wireless power transmission；The 1 main power source supply voltage of transmitting terminal is 24V, including is sequentially connected
Three-level voltage regulator circuit 3, the protection circuit 4, single-chip microcontroller 5 connect, and the temperature sensing circuit connected by 5 parallel bidirectional of single-chip microcontroller
6, charged state LED indication 7,4 tunnel power emission detection units 8；The multistage voltage regulator circuit 3 provides main electric energy to 4 parallel
Road emits detection unit 8；The receiving end 2 includes the reception end-coil 13 being linked in sequence, receiving end resonant capacitance 14, rectification filter
Wave circuit 15, Voltage stabilizing module 16 and load 17, Voltage stabilizing module 16 has 4 output voltage performance numbers 5V/5W, 9V/15W, 12V/
16W, 24V/24W, full-load power output is 60W, and load 17 here can be any electronics such as mobile phone, computer, TV, desk lamp
Equipment is allowed there are relatively high power span, they can be equivalent to different valued resistor loads.
Further, the power emission detection unit 8 includes inverter circuit 9, transmitting terminal resonant capacitance 11, transmitting terminal
Coil 12 and current sample amplifying circuit 10；The single-chip microcontroller 5 exports 4 tunnel PWM waves and drives 4 road inverter circuits 9 one by one, electricity
Stream amplifier circuit 10 feeds back to single-chip microcontroller 5 from 9 sampled current value of inverter circuit, and then constitutes a power adaptive allotment
Closed loop circuit；Single-chip microcontroller 5 can judge the watt level of current receiving end according to sampled current value and adjust the PWM wave on the road
Frequency is to adapt to the specified charge power in receiving end；The temperature sensing circuit 6 detects transmitting terminal temperature conditions, if detecting
Temperature is more than the temperature threshold pre-seted, and single-chip microcontroller 5, which can immediately turn off PWM output, makes power emitting unit stop power emission,
Temperature threshold is set as 80 DEG C in the present embodiment；The charged state LED indication 7 provides power supply status instruction, charging shape
State instruction, overtemperature and overcurrent state instruction and foreign matter state instruction, and shown with LED modules with different colors, in the present embodiment at system
In charged state green light, foreign matter state blue lamp is bright, and overcurrent and over-temperature condition red light are bright.
Further, 4 transmitting end-coils 12 and 4 reception end-coils 13, structure is each with unit for electrical property parameters
From with high consistency, whole is in the staggered snail winding structure of density, and transmitting coil line footpath is 2mm, internal diameter 20mm,
The number of turns is 15 circles, and receiving coil line footpath is 1.2mm, and internal diameter 15mm, the number of turns is 20 circles, and is supported with FR4 substrate 18；Described
8 root long through-holes are dug out on FR4 substrate 18, and 8 ferrite shielding magnetic stripes 19 are embedded in 8 root long through-holes of FR4 substrate 18；Institute
The 4 transmitting end-coils 12 and 4 stated receive end-coil 13, and parallel face, ferrite magnetic stripe face outwardly one by one.
The one-to-many wireless power control method of power adaptive allotment, be suitable for wireless transmission platform has not to multiple
Wireless charging, power supply are carried out with the radio receiver for receiving power.Its control process is divided into target detection and power distribution two
A stage；First stage is that transmitting terminal detects receiving end and identifies the charge power of its demand；Second stage is that transmitting terminal exists
After identifying target terminal, working frequency is adjusted to meet receiving end power demand, carries out wireless charging.
In the present embodiment, the self-resonant frequency of power emission detection unit 8 is 100KHz, therefore single-chip microcontroller 5 exports PWM
Wave frequency rate variation range is 100KHz~175KHz；In the first stage, single-chip microcontroller 5 drives 4 with 4 tunnel PWM waves of off-resonance point
Road inverter circuit 9, frequency is selected as 175KHz, only exports PWM wave all the way in synchronization, therefore only power emission is examined all the way
It surveys unit 8 and is in detecting state, within a time cycle, 4 tunnel PWM waves recycle output, 4 tunnel power emission detection units in turn
8 cycle detections in turn；After certain detects target success all the way, remaining each road is still in cycle detection state, every to detect all the way
Time is 0.6s, and 4 tunnels amount to 2.4S, therefore longest detection time is 2.4S when target terminal is in detection range；By to hair
The Oscillation Amplitude of end current sample amplifying circuit 10 is penetrated to judge the corresponding bearing power in current receiving end 2；Every road PWM driving letter
Number duty cycle range is 15%, to achieve the purpose that reduce standby power, standby current 30mA, stand-by power consumption 0.72W.
The second stage, single-chip microcontroller 5 judge the size of current of current sample amplifying circuit 10 to calculate current hair
Power is penetrated, it is close towards resonance point to adjust PWM wave frequency if power is less than normal, if power off-resonance point bigger than normal, real-time monitoring
With regulation, guarantee charging normal table.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill disclosed the technical disclosures can make according to the present invention and various not depart from various other tools of the invention
Body variations and combinations, these variations and combinations are still within the scope of the present invention.
Claims (6)
1. a kind of one-to-many wireless charging system of power adaptive allotment, including transmitting terminal (1), receiving end (2), feature exists
In: the transmitting terminal (1) can carry out mutually independent magnetic resonance coupling formula to the receiving end (2) of N number of different capacity load simultaneously
Wireless power transmission, N are the integer greater than 2；The transmitting terminal (1) includes the multistage voltage regulator circuit (3) being linked in sequence, protection
Circuit (4), single-chip microcontroller (5), and the temperature sensing circuit (6), the charged state LED that are connected by single-chip microcontroller (5) parallel bidirectional
Indicate (7), the road N power emission detection unit (8)；The multistage voltage regulator circuit (3) provides main electric energy parallel and emits inspection to the road N
It surveys unit (8)；The receiving end (2) includes the reception end-coil (13) being linked in sequence, receiving end resonant capacitance (14), rectification filter
Wave circuit (15), Voltage stabilizing module (16) and load (17).
2. a kind of one-to-many wireless charging system of power adaptive allotment according to claim 1, it is characterised in that:
The power emission detection unit (8) include inverter circuit (9), transmitting terminal resonant capacitance (11), transmitting end-coil (12) with
And current sample amplifying circuit (10)；Single-chip microcontroller (5) the output road the N PWM wave drives the road N inverter circuit (9), electric current one by one
Amplifier circuit (10) is fed back to single-chip microcontroller (5) from inverter circuit (9) sampled current value, and then constitutes a power adaptive
The closed loop circuit of allotment；The charged state LED indication (7) provides power supply status instruction, charged state instruction, overtemperature and overcurrent
State instruction and foreign matter state instruction, and shown with LED modules with different colors.
3. a kind of one-to-many wireless charging system of power adaptive allotment according to claim 1, it is characterised in that:
N number of transmitting end-coil (12) and N number of reception end-coil (13), structure respectively have height consistent with unit for electrical property parameters
Property, whole is in the staggered snail winding structure of density, and is supported with FR4 substrate (18)；On the FR4 substrate (18)
M root long through-hole is dug out, M is the integer greater than 5, and M root ferrite shielding magnetic is embedded in the M root long through-hole of FR4 substrate (18)
Item (19)；Parallel face, ferrite magnetic stripe face outwardly N number of transmitting end-coil (12) one by one with N reception end-coil (13).
4. a kind of control method of the one-to-many wireless charging system of power adaptive allotment according to claim 1,
It is characterized by: control process is divided into target detection and two stages of power distribution；First stage is that transmitting terminal detects reception
Hold and identify the charge power of its demand；Second stage is transmitting terminal after identifying target terminal, adjusts working frequency with full
Sufficient receiving end power demand carries out wireless charging.
5. one kind according to claim 4 can power adaptive allotment one-to-many wireless charging system controlling party
Method, it is characterised in that: the first stage, single-chip microcontroller (5) drive the road N inverter circuit with the road the N PWM wave of off-resonance point
(9), PWM wave all the way is only exported in synchronization, therefore only power emission detection unit (8) is in detecting state all the way,
In one time cycle, the road N PWM wave recycles output in turn, the road N power emission detection unit (8) cycle detection in turn；When a certain
After target success is detected on road, remaining each road is still in cycle detection state；By to transmitting terminal current sample amplifying circuit
(10) Oscillation Amplitude judges the corresponding bearing power in current receiving end；Every road PWM drive signal is equipped with duty ratio, to reach
Reduce the purpose of standby power.
6. one kind according to claim 4 can power adaptive allotment one-to-many wireless charging system controlling party
Method, it is characterised in that: the second stage, single-chip microcontroller (5) judge the size of current of current sample amplifying circuit (10) to count
Current transmission power, it is close towards resonance point to adjust PWM wave frequency if power is less than normal, if power off-resonance bigger than normal
Point, real-time monitoring and regulation guarantee charging normal table.
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| CN201811551118.8A CN109510288A (en) | 2018-12-18 | 2018-12-18 | A kind of one-to-many wireless charging system and control method of power adaptive allotment |
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