CN107579601A - The resonant frequency control method of wireless energy transform device and this kind of device - Google Patents
The resonant frequency control method of wireless energy transform device and this kind of device Download PDFInfo
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Abstract
Wireless energy transform device, it includes：Capacitance matrix, detection circuit, relay system, oscillator and single chip control unit, the single chip control unit is configured to the working frequency scan variations for controlling oscillator to make excitation power supply, energy control relay system makes the intrinsic frequency scan variations of launching circuit, size and frequency of the output voltage with output current with each output current during phase can be recorded, the frequency of the minimum output current in each output current recorded can be selected, moreover it is possible to make excitation power supply working frequency and launching circuit intrinsic frequency it is all identical with the frequency of the minimum output current.Apparatus of the present invention, control device only is set in the transmitting terminal of system, the intrinsic frequency with regard to the working frequency of excitation power supply and intrinsic frequency all scan variations of launching circuit and dynamic tracking reception loop can be made, can be achieved with the resonant operational of whole system.
Description
It is on July 7th, 2014, Application No. 201410319501.6, entitled " wireless energy the applying date that the application, which is,
The divisional application of the patent application of the resonant frequency control method of amount transmitting device and this kind of device ".
Technical field
The present invention relates to wireless energy transmission technology field, more particularly to a kind of wireless energy transform device and this kind dress
The resonant frequency control method put.
Background technology
Various electrical equipments realize the transmission of energy usually using wired connection.Due to being wirelessly transferred with making for energy
With safe and convenient feature, that realizes energy is wirelessly transferred the dream that always people's serious hope is realized.Some it is special should
With place, such as underwater operation, medical embedded equipment, wireless network is inconvenient or can not use the occasion of wire offer energy,
Realize that wireless energy transfer has higher application value.
According to energy transmission principle, at present, the wireless energy transmission technology at home and abroad studied mainly has electromagnetism wave energy
Measure transmission technology, inductive coupling type wireless energy transmission technology and resonance type wireless energy transmission technology.
Electromagnetic wave energy transmission technology is the principle sent and received using antenna, for example carries out wireless energy using microwave
Transmission, this technology can realize high transimission power, subject matter existing for the technology be in energy transmission path not
There can be barrier to block, i.e. energy transmission can not bypass or through barrier.
Inductive coupling type wireless energy transmission technology is to utilize electromagnetic induction principle, using loosely coupled transformer or separable
Formula transformer realizes contactless power transmission.Subject matter existing for this kind of technology is energy transmission range by transmission principle
Limitation and be limited in a millimeter grade.
Resonance type wireless electric energy transmission technology be it is a kind of make launching circuit separated by a distance and receive loop all in
The energy transmission technology of resonant condition, it is adapted to the transmission that wireless energy is realized in moderate distance.Due to launching circuit and reception
Loop, easily by various interference, makes whole system be difficult to work in resonant condition in the working environment of reality, and system
Off resonance drastically declines the efficiency of transmission for making system.
The content of the invention
It is an object of the present invention in wireless energy transform device, it is capable of the resonance frequency of adjust automatically or control system
Rate simultaneously makes whole system work in resonant condition.
In order to realize the purpose of the present invention, the first aspect of the present invention is to provide for a kind of the humorous of wireless energy transform device
Vibration frequency control method, the wireless energy transform device is using the coupling of electromagnetic field from the launching circuit positioned at transmitting terminal to position
In the reception loop transmission energy of receiving terminal, it is characterised in that the resonant frequency control method includes, and detects and is launched by access
The output voltage and output current of the excitation power supply in loop；Make the working frequency of excitation power supply and the intrinsic frequency point of launching circuit
Do not change in first frequency region and second frequency sector scanning, wherein, first frequency region and second frequency region all include
Receive the 3rd frequency field residing for the intrinsic frequency in loop, the working frequency of excitation power supply and the intrinsic frequency of launching circuit point
Sao Miao not first frequency region and second frequency region at least one time；Be recorded in scanning process the output voltage of excitation power supply with
Output current is in the size and frequency of each output current with excitation power supply detected during phase；Select what is recorded
The frequency of minimum output current in each output current；Make the working frequency of excitation power supply and the intrinsic frequency of launching circuit again
It is all identical with the frequency of the minimum output current.
In the application system of reality, the circuit parameter in launching circuit and reception loop is subjected to the influence of environment and become
Change, launching circuit and the intrinsic frequency in reception loop is changed, in fact, the intrinsic frequency of launching circuit and reception
The intrinsic frequency in loop may all change in respective a certain frequency field, for example, the intrinsic frequency for receiving loop may be
Change in the 3rd described frequency field, therefore in the working environment of reality, launching circuit and the off resonance for receiving loop are very
It is incidental.
The resonant frequency control method of the present invention, only takes control measure in the transmitting terminal of system, makes excitation power supply
Working frequency and the intrinsic frequency of launching circuit all scan variations and dynamic track the intrinsic frequency in reception loop, so that entirely
System is in resonant operational state.
And existing technology usually requires all to take control measure in transmitting terminal and receiving terminal, can just make at whole system
In resonant operational state；And in the application such as medical embedded equipment, it is very to take control measure in the receiving terminal of system
Difficult, even not possible with；Therefore, resonant frequency control method of the invention only takes control in the transmitting terminal of system
Measure can be achieved with the resonant operational of system, and this is technically an important breakthrough and has very high application value.
Because the frequency of the output current of excitation power supply is identical with the working frequency of excitation power supply, so excitation power supply is defeated
Go out the frequency of electric current i.e. the working frequency of excitation power supply.
Scanning first frequency region refers to for one time since the one end in first frequency region scanning to first frequency region
The other end terminates so scanning one time；Equally, second frequency region is scanned to refer to since the one end in second frequency region for one time
The other end scanned to second frequency region terminates so scanning one time.
In the resonant frequency control method, first frequency region can be more than second frequency region, first frequency area
Domain can be equal to second frequency region, and first frequency region might be less that second frequency region.
In one preferred embodiment, first frequency region includes second frequency region.It is preferable real at another
Apply in embodiment, second frequency region includes first frequency region.
In the resonant frequency control method, the intrinsic frequency of the launching circuit is in second frequency region with certain
Stepping-in amount scan variations, and intrinsic frequency one stepping-in amount of every scan variations of the launching circuit, the excitation power supply
Working frequency is scanned for first frequency region one time.
One stepping-in amount of every scan variations described here refers to often increase or decrease a stepping-in amount.If stepping-in amount is
100 hertz, a stepping-in amount just represents 100 hertz, and intrinsic frequency refers to that intrinsic frequency often increases per one stepping-in amount of scan variations
Add deduct few 100 hertz.
In the resonant frequency control method, the working frequency of the excitation power supply is in first frequency region with certain
Stepping-in amount scan variations, and working frequency one stepping-in amount of every scan variations of the excitation power supply, the launching circuit
Intrinsic frequency is scanned for second frequency region one time.
In the resonant frequency control method, transmitting can be made by the parameter for the resonant element for controlling launching circuit
The intrinsic frequency scan variations in loop.Preferably, launching circuit is made by the size for the resonant capacitance for controlling launching circuit
Intrinsic frequency scan variations.
In the resonant frequency control method, the 3rd frequency field received residing for the intrinsic frequency in loop is generally advance
Setting, and set accuracy is verified by testing, usually require that the 3rd frequency field is as far as possible small, but require to receive loop
Intrinsic frequency can only change in the 3rd frequency field.
The second aspect of the present invention is to provide for a kind of new wireless energy transform device, and described device utilizes electromagnetic field
Coupling is from the launching circuit positioned at transmitting terminal to the reception loop transmission energy positioned at receiving terminal, it is characterised in that described device
Including, capacitance matrix, the resonant element as launching circuit；Circuit is detected, for detecting by the excitation electricity of access launching circuit
The output voltage and output current in source；Relay system, for controlling capacitance matrix so that the intrinsic frequency of launching circuit can be swept
Retouch change；Oscillator, for controlling the working frequency of excitation power supply；Single chip control unit, the single chip control unit quilt
It is arranged to, the frequency of oscillation of oscillator can be controlled to make the working frequency scan variations of excitation power supply, energy control relay system makes
The intrinsic frequency scan variations of launching circuit, can be recorded in the output voltage of excitation power supply with output current with phase when detect circuit
The size and frequency of each output current of detected excitation power supply, it can select in each output current recorded
The frequency of minimum output current, moreover it is possible to control oscillator and relay system makes the working frequency and launching circuit of excitation power supply
Intrinsic frequency is all identical with the frequency of the minimum output current；Wherein, the working frequency of excitation power supply and launching circuit is intrinsic
Frequency changes in first frequency region and second frequency sector scanning respectively, and first frequency region and second frequency region all include
Receive the 3rd frequency field residing for the intrinsic frequency in loop.
The device of the present invention, control device, the working frequency with regard to that can make excitation power supply only are set in the transmitting terminal of system
The intrinsic frequency for receiving loop is tracked with the intrinsic frequency all scan variations and dynamic of launching circuit, can be achieved with whole system
Resonant operational.And existing technology usually requires all to set control device in the transmitting terminal of system and the receiving terminal of system, ability
Make whole system resonant operational.Therefore, device of the invention technically has significant progressive.
In the device, first frequency region can be more than second frequency region, and first frequency region can be equal to
Second frequency region, first frequency region might be less that second frequency region.
In a preferred embodiment, first frequency region includes second frequency region.Preferably implement at another
In example, second frequency region includes first frequency region.
Preferably, the intrinsic frequency of the launching circuit in second frequency region with certain stepping-in amount scan variations, and
And the intrinsic frequency of the launching circuit is scanned for first per one stepping-in amount of scan variations, the working frequency of the excitation power supply
Frequency field one time.
Preferably, the working frequency of the excitation power supply in first frequency region with certain stepping-in amount scan variations, and
And the working frequency of the excitation power supply is scanned for second per one stepping-in amount of scan variations, the intrinsic frequency of the launching circuit
Frequency field one time.
In the wireless energy transform device, the intrinsic of launching circuit can be made by changing the parameter of capacitance matrix
Frequency scanning change.
Brief description of the drawings
Fig. 1 is the structural representation of the wireless energy transform device of the present invention.
Fig. 2 is working frequency, the intrinsic frequency of launching circuit of excitation power supply in wireless energy transform device shown in Fig. 1
And receive the relation schematic diagram between the intrinsic frequency in loop.
Fig. 3 is the control flow schematic diagram of the resonant frequency control method of wireless energy transform device.
Fig. 4 is the control flow of another embodiment of the resonant frequency control method of wireless energy transform device.
Embodiment
Figure l is the structural representation of the wireless energy transform device of the present invention, and it is made up of transmitting terminal and receiving terminal.
In Fig. 1, transmitting terminal is included by excitation power supply, transmitting coil, transmitting electric capacityAnd capacitance matrixThe transmitting formed
Loop and the control circuit being mainly made up of single chip control unit, relay system and detection circuit.Wherein, excitation power supplyIncluding dc source, by FETWithHalf bridge circuit, drive circuit and the oscillator formed.Receiving terminal
Including by receiving coil, receive electric capacityAnd loadThe reception loop formed.
In Fig. 1, detection circuit detects the output voltage of excitation power supply respectivelyAnd output current, it is then passed to A/
D converters carry out analog-to-digital conversion, are finally sent in Micro-processor MCV.The control signal that Micro-processor MCV is sent passes through I/O
Interface controls oscillator and relay system to carry out associative operation respectively.With reference to figure 2, single chip control unit control oscillator and
Relay system, make the working frequency of excitation power supplyChange in first frequency sector scanning, make the intrinsic frequency of launching circuitChange in second frequency sector scanning, wherein, receive the intrinsic frequency in loopIn the 3rd frequency field, first frequency
Region and second frequency region all include the 3rd frequency field.
In Fig. 1, if the electric current for flowing through launching circuit and reception loop is respectively、, transmitting coilWith receiving line
CircleBetween mutual inductance and distance be respectively、, excitation power supplyInternal resistance be, transmitting coilWith receiving coilResistance be respectively、, using Kirchhoff's second law, can obtain following formula：
（1）
Can be by（1）Formula can solve：
（2）
In formula:
（3）
（4）
（5）
From（2）As can be seen that the output voltage of excitation power supply in formulaWith the electric current of launching circuitDuring in same phase, have, at this moment（2）Formula can be changed to
（6）
From（4）Formula and（6）Formula can be seen that resistanceSize and angular frequencyIt is closely related, in the output of excitation power supply
VoltageWith launching circuitIn the case of same phase, ifMaximum is obtained, at this momentObtain minimum value.
Order, can obtainWhen obtaining maximum,Following formula should be met：
（7）
In formulaTo receive the quality factor in loop, it meets following formula：
（8）
Due to reality application system in, quality factorTypically much deeper than 1, at this moment（7）Formula can be changed to：
（9）
At this moment above formula explanation receives loop will be in resonant condition.Will（9）Formula substitutes into（5）Formula simultaneously applies relation, can be with
Obtain：
（10）
At this moment launching circuit is also at resonant condition to above formula explanation.
Therefore, in heightIn the application system of value, in the output voltage of excitation power supplyWith the electric current of launching circuitPlace
In the case of Yu Tongxiang,When obtaining minimum value, launching circuit and it is received back to road and lies substantially in resonant condition.Here it is this hair
The theoretical foundation that bright resonant frequency control technology is only controlled in transmitting terminal.
Fig. 2 shows the working frequency of the excitation power supply of the present embodiment, launching circuit intrinsic frequencyBe received back to
The intrinsic frequency on roadCorrelation between three.In fig. 2 it will be clear that the working frequency of excitation power supply
Scanning range existExtremelyBetween, the intrinsic frequency of launching circuitScanning range existExtremelyBetween, it is received back to
The intrinsic frequency on roadCan beExtremelyBetween change, wherein,Scanning range includeThe whole frequency that may change
Section,Scanning range includeScanning range.
In the present embodiment, the intrinsic frequency of launching circuitIn second frequency region using stepping-in amount as 100 hertz of scannings
Change, and the intrinsic frequency of launching circuit often changes 100 hertz, the working frequency of excitation power supplyIt is scanned for first frequency area
Domain one time.If the intrinsic frequency of launching circuitFrom frequencyScan to frequencyStepping n times are needed, that is, change N number of 100
Hertz, then the working frequency of excitation power supplyIt is scanned for first frequency region N times, so the intrinsic frequency when launching circuit
From frequencyScan to frequency, the working frequency of excitation power supplyWhen scanning through first frequency region N times, excitation power supply
Output voltage just has n times to be in cophasal state with output current, if recorded in the output of excitation power supply in this scanning process
Voltage is in the size and frequency of N number of output current with excitation power supply detected during phase with output current, and selects
The frequency of minimum output current in the N number of output current recorded, then control oscillator and relay system to make excitation power supply
Working frequencyWith the intrinsic frequency of launching circuitAll identical with the frequency of the minimum output current, such whole system will
In resonant condition.
Fig. 3 is the control flow schematic diagram of the resonant frequency control method of the wireless energy transform device of the present invention.In Fig. 3
In it can be seen that, the resonant frequency control method includes：Detection is by the output voltage of the excitation power supply of access launching circuitWith
Output current；Make the working frequency of excitation power supplyWith the intrinsic frequency of launching circuitRespectively in first frequency region and
Two frequency field scan variations, and make the working frequency of excitation power supplyWith the intrinsic frequency of launching circuitFirst is scanned respectively
Frequency field and second frequency region at least one time, wherein, first frequency region and second frequency region all include receiving loop
Intrinsic frequencyThe 3rd residing frequency field；It is recorded in the output voltage of excitation power supply in scanning processWith output electricity
StreamThe size and frequency of each output current of detected excitation power supply during in same phase；Select recorded it is each
The frequency of minimum output current in output current；Make the working frequency of excitation power supply againWith the intrinsic frequency of launching circuit
RateAll with the frequency of the minimum output currentIt is identical.
Fig. 4 shows the controlling stream of another embodiment of the resonant frequency control method of wireless energy transform device
Journey.In this embodiment, resonant frequency control method includes：System initialization, it is parameter、、、Assignment respectively、, 0,0, wherein、The respectively low-limit frequency in first frequency region and second frequency region；Control oscillator
Make the working frequency of excitation power supplyWork in the low-limit frequency in first frequency region, control the capacitance matrix of launching circuit
Make the intrinsic frequency of its launching circuitWork in the low-limit frequency in second frequency region；Detection is by access launching circuit
Excitation power supplyOutput voltageAnd output current；To parameterWhether judged more than 0, to output voltageWith
Output currentWhether mutually judged together；When the intrinsic frequency of launching circuit works in the low-limit frequency in second frequency region
When, the working frequency of excitation power supplyWith stepping-in amountLow-limit frequency from first frequency regionScan to first frequency
The highest frequency in region, intrinsic frequencyOften increase a stepping-in amount, the working frequency of excitation power supplyWith stepping-in amountFirst frequency region is scanned one time, when the intrinsic frequency of launching circuit is scanned to the highest frequency in second frequency regionAnd
And the working frequency of excitation power supply is also scanned to the highest frequency in first frequency regionAfterwards, its scanning temporarily ceases, and records
The output voltage in above-mentioned scanning processAnd output currentThe size and frequency of each output current during in same phase；Choosing
Select out the minimum current in each output current recordedFrequency；Make working frequency and the transmitting of excitation power supply again
The intrinsic frequency in loop all with minimum currentFrequencyIt is identical, and to parameterIncrease by 1, so as to follow-up control.At this
In embodiment, also include in resonant frequency control method, empty the size and frequency of each output current recorded, with section
Save memory space；Whether the ratio between the offset of output current detected in operation and former output current are more thanCarry out
Judge, parameter hereIt can set as needed, such asIt can be set to, if it is determined that condition not into
Vertical, system is worked with the frequency of originally selected minimum current, if it is determined that condition is set up, by process weight as described above
The frequency of new minimum current is newly selected, and makes the working frequency of excitation power supply and the intrinsic frequency of launching circuit and new minimum
The frequency of electric current is identical.
While there has been shown and described that preferable embodiments of the invention are presently considered to be, but it will be apparent that this area
Technical staff can carry out various changes and improvement.And these are altered or modified, belong to appended claims and limited
The scope of the present invention.
Claims (2)
1. a kind of wireless energy transform device, described device is using the coupling of electromagnetic field from the launching circuit positioned at transmitting terminal to position
In the reception loop transmission energy of receiving terminal, it is characterised in that described device includes：Capacitance matrix, as the humorous of launching circuit
Shake element；Circuit is detected, for detecting by the output voltage and output current of the excitation power supply of access launching circuit；Relay system
System, for controlling capacitance matrix so that the intrinsic frequency energy scan variations of launching circuit；Oscillator, for controlling excitation power supply
Working frequency；Single chip control unit, the single chip control unit are configured to, and the frequency of oscillation of oscillator can be controlled to make to swash
The working frequency scan variations of power supply are encouraged, energy control relay system makes the intrinsic frequency scan variations of launching circuit, can recorded
Excitation power supply output voltage and output current with each output current that the excitation power supply detected by circuit is detected during phase
Size and frequency, the frequency of the minimum output current in each output current recorded can be selected, moreover it is possible to control vibration
Device and relay system make the working frequency of excitation power supply and frequency of the intrinsic frequency all with the minimum output current of launching circuit
Rate is identical；Wherein, the working frequency of excitation power supply and the intrinsic frequency of launching circuit are respectively in first frequency region and the second frequency
Rate sector scanning changes, and first frequency region and second frequency region are all including receiving the 3rd frequency residing for the intrinsic frequency in loop
Rate region, the working frequency of the excitation power supply with certain stepping-in amount scan variations, and described swash in first frequency region
The working frequency for encouraging power supply is scanned for second frequency region per one stepping-in amount of scan variations, the intrinsic frequency of the launching circuit
One time.
2. device as claimed in claim 1, it is characterised in that make consolidating for launching circuit by changing the parameter of capacitance matrix
There is frequency scanning to change.
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| CN201711087634.5A CN107579601B (en) | 2014-07-07 | 2014-07-07 | Wireless energy transform device |
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| CN201711087634.5A CN107579601B (en) | 2014-07-07 | 2014-07-07 | Wireless energy transform device |
| CN201410319501.6A CN105305642B (en) | 2014-07-07 | 2014-07-07 | The resonant frequency control method of wireless energy transform device and this kind of device |
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| CN110350670A (en) * | 2019-05-29 | 2019-10-18 | 北京航空航天大学 | A kind of Universal wireless charging transmitting end device and control method |
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| CN107046330A (en) * | 2016-02-08 | 2017-08-15 | 松下电器产业株式会社 | Signal generating apparatus |
| CN105978169B (en) * | 2016-04-05 | 2018-10-23 | 西南交通大学 | A kind of dynamic tuning method of wireless power transmission equipment transmitting terminal frequency-tracking |
| CN106037269B (en) * | 2016-05-30 | 2018-10-09 | 华南理工大学 | Intelligent heat preserving table arrangement and its working method based on magnetic resonance wireless energy transfer |
| CN106404210B (en) * | 2016-12-08 | 2023-10-20 | 广东中实源创科技有限公司 | Temperature measuring method and device and product using same |
| CN109962531B (en) * | 2017-12-26 | 2021-02-12 | 北京万集科技股份有限公司 | Laser radar wireless power supply control method and laser radar device |
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| CN101316053A (en) * | 2008-06-04 | 2008-12-03 | 哈尔滨工业大学 | Magnetic coupling resonance vibration type wireless energy transform device |
| US20120043930A1 (en) * | 2010-08-17 | 2012-02-23 | Ut-Battelle, Llc | Off-resonance frequency operation for power transfer in a loosely coupled air core transformer |
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| CN105305642A (en) | 2016-02-03 |
| CN107579601B (en) | 2019-09-06 |
| CN105305642B (en) | 2017-12-15 |
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Effective date of registration: 20200114 Address after: Hangzhou City, Zhejiang province Binjiang District 310053 shore road 555 Patentee after: Zhejiang Police College Address before: 310052 Hangzhou City, Binjiang District Province, No., Shing Road, Garden Court, building 2, room 3, unit 1402, room 3191 Patentee before: Xu Jiqiong |
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