CN106329738A - Magnetic resonance wireless power transmission-based natural frequency tuning device and control method - Google Patents
Magnetic resonance wireless power transmission-based natural frequency tuning device and control method Download PDFInfo
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- CN106329738A CN106329738A CN201610848199.2A CN201610848199A CN106329738A CN 106329738 A CN106329738 A CN 106329738A CN 201610848199 A CN201610848199 A CN 201610848199A CN 106329738 A CN106329738 A CN 106329738A
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Abstract
The present invention relates to a wireless power transmission technology, in particular, a magnetic resonance wireless power transmission-based natural frequency tuning device and a control method. The magnetic resonance wireless power transmission-based natural frequency tuning device comprises a resonance coil system and a control word; the magnetic resonance wireless power transmission-based natural frequency tuning device further comprises a tuning capacitor array, a tuning inductor array and control switching networks; the tuning capacitor array and the tuning inductor array are connected in series with the resonance coil system; the control switching networks are connected in series with the tuning capacitor array and the tuning inductor array sequentially; and the control word controls the control switching networks and realizes control on the access of the tuning capacitor array or the tuning inductor array to the resonance coil system. According to the magnetic resonance wireless power transmission-based natural frequency tuning device and the control method, one capacitor array and one inductor array are constructed, so that the adjustment of the natural frequency of the harmonic oscillator of a magnetic resonance wireless transmission system can be realized; and according to the capacitor array and the inductor array, only a small number of capacitors and inductors are combined together respectively, large-adjustment range precise coverage can be realized according to a fixed step length, and positive and negative adjustment of the natural frequency of the harmonic oscillators of the magnetic resonance wireless transmission system can be realized.
Description
Technical field
The invention belongs to wireless power transmission technical field, particularly relate to natural frequency based on magnetic resonance wireless power transmission tuning dress
Put and control method.
Background technology
High pressure, supergrid monitoring terminal to ensure power grid operation most important, be with informationization, automatization,
The part that the interactive modernization electrical network being characterized is indispensable.But, energy problem is to limit intelligent grid monitoring all the time
Key issue with management.Traditional solution is used mostly wind energy, the solar energy distributed energy, and distributed energy is solid
Some unstability make terminal unit cannot obtain the guarantee of the reliable energy, problem in the environment of south rainy weather is more
More serious.On the other hand, high pressure defeated/distribution road on have abundance electric energy but due to insulation requirement and cannot be directly from height
Pressure side draw electricity, thus define a prominent contradiction.
In recent years, developing rapidly of wireless power transmission technology is possibly realized so that directly transmitting electricity to low-pressure side from high-pressure side, for
The energy supply solving intelligent grid terminal unit provides new possibility, is based especially on the wireless power transmission skill of magnetic resonance principle
Art, it is possible to realize the high-efficiency transfer of electric energy in relatively remote.
It is known that in traditional two coil systems, system can have relatively under conditions of two ends natural frequency is consistent
High service behaviour.But magnetic resonance type radio energy transmission system is when actual motion, due to processing technology, mounting condition
Limit, and by high-frequency circuit stray inductance, electric capacity, the impact of the factor such as environmental change, transmission coil parameter often can be made to occur
Drift, thus affect efficiency of transmission and the through-put power of system.There is also the change value of wireless power transmission systems natural frequency simultaneously
The most energetic problem.
Summary of the invention
It is an object of the invention to realize the quantization to magnetic resonance wireless power transmission systems harmonic oscillator natural frequency regulate, greatly
Amplitude improves efficiency of transmission.
Another purpose is solve to cause when processing technique, stray parameter, parasitic parameter, parameter drift intrinsic
Frequency drift, reduces system to stray inductance, electric capacity, the sensitivity of the factors such as environmental change.
For achieving the above object, the technical solution used in the present invention is: natural frequency based on magnetic resonance wireless power transmission is adjusted
Humorous device, including resonance coil system；Also include tuning capacity array, tuning coil array and control switching network；Tuning electricity
Hold array, tuning coil array to be connected with resonance coil Cascade System, control switching network successively with tuning capacity array, tuning
Electric inductance array is connected in series；Switching network is controlled, it is achieved tuning capacity array or tuning coil array connect by control word
Enter the control of resonance coil system.
In above-mentioned natural frequency tuner based on magnetic resonance wireless power transmission, tuning capacity selects EACO company raw
The noninductive electric capacity produced, noninductive capacitance 0.001uF, 0.01uF, 0.0047uF, 0.1uF；Bear voltage be 1200V～
2000V。
In above-mentioned natural frequency tuner based on magnetic resonance wireless power transmission, tuning coil use litz wire around
System；Resonance coil system inductance uses multiply litz wire coiling.
In above-mentioned natural frequency tuner based on magnetic resonance wireless power transmission, control switching network and include audion
And relay；Audion is NPN type triode；G2R-2-5V relay selected by relay, and its contact resistance is 50m Ω, resets
Time, rated current was 106mA at below 20ms, heatproof up to-40 DEG C to 70 DEG C between, per hour operating frequency up to
18000 times.
The control method of natural frequency tuner based on magnetic resonance wireless power transmission, comprises the following steps:
Step 1, the design of control switching network:
Carry out 2 system conversions；N group control switching network make resonance coil system frequency range of accommodation cover 0～
(2N-1) * K kHz, wherein K is the minima changing natural frequency；1 group controls switching network and controls tuning coil；Then N+1 group
Control switching network and control natural frequency-(2N-1) * K～(2N-1) fixed step size regulation is pressed in the range of * K kHz；
Control the normality of switch and be tuning capacity or tuning coil does not access resonance coil system；Connect when controlling switching network
Receiving control word is 0, controls switching network and is failure to actuate；Control word is 1, controls switching network action, makes the tuning capacity of correspondence
Or tuning coil accesses in resonance coil system, thus change the natural frequency of resonance coil system；
Step 2, harmony electric capacity, tuning coil value proportioning:
Use tuning capacity combination and the natural frequency of tuning coil combination regulation resonance coil system, if resonance coil system
System natural frequency is Fg,Wherein LsFor tuning coil value, CsFor tuning capacity value；Tuning capacity series connection makes
Capacitance reduces, natural frequency FgIncrease；Tuning coil series connection makes inductance value increase, natural frequency FgReduce；
Capacitances in series computing formula isInductance series connection computing formula is L=LΙ+LΙΙ；By electric capacity, electricity
Sense series connection computing formula and natural frequency computing formula calculate that natural frequency of sening as an envoy to changes capacitance required during M kHz and electricity
Inductance value；Calculate N group tuning capacity value and change-(2N-1) corresponding for * K kHz tuning coil value, it is achieved natural frequency-
(2N-1) * K～(2N-1) fixed step size regulation is pressed in the range of * K kHz；
Step 3, covering precision and the realization of coverage:
Control switching network to be respectively used to control tuning capacity array and tuning coil array；N+1 group controls switching network
Have 2N+1Plant on off state, the most corresponding 2N+1Plant the result of natural frequency regulation, realize bigger regulation by fixing step-length
The accurate covering of scope；Every kind of on off state changes the natural frequency of K kHz, choosing of K value relative to former on off state
Determined by resonance coil system frequency drift situation；
The selection of step 4, tuning capacity, electric inductance array combination:
The result gathering two groups of control word correspondence natural frequency knots modification contrasts, it is judged that whether respective array is optimum
Solve, if not optimum, then continue to gather, compare, until reaching the optimal solution of resonance coil system cognizant；By detection contrast really
Fixed final tuning capacity, the selection of electric inductance array combination.
Above-mentioned natural frequency tuner is by building capacitance-inductance switch arrays, it is achieved wireless to magnetic resonance
The regulation of transmission system harmonic oscillator natural frequency.This capacitance-inductance array only utilizes the combination of minority electric capacity, inductance, can press
Fixing step-length realizes the accurate covering to relatively wide adjusting range, and can consolidating the harmonic oscillator of magnetic resonance type wireless power transmission systems
Frequency is had to carry out the two-ways regulation of positive and negative both direction.Bigger tuning range can be covered, it is ensured that wireless power transmission with less step-length
The transmitting terminal of system has consistent natural frequency with receiving terminal, thus improves system service behaviour.
Above-mentioned natural frequency tuner operation principle is when series capacitance in resonance coil system, resonance coil system
System natural frequency increases；When series inductance, resonance coil system frequency reduces.Relay switch is controlled by control word
Network action, thus control the most whether to access in resonance coil system, by capacitor and inductor value proportioning to resonance line
Circle system frequency realizes two-way, by step-length regulation.
The invention has the beneficial effects as follows: do not affect the work of resonance coil system, only access capacitor combination and electricity by series connection
Sense combination directly regulates the natural frequency of resonance coil system, and can realize quantifying regulation.Solve processing technique, miscellaneous well
The problem dissipating the natural frequency drift caused when parameter, parasitic parameter, parameter drift, is possible not only to increase substantially biography
Defeated efficiency, reduces resonance coil system to stray inductance, electric capacity, the sensitivity of the factors such as environmental change simultaneously.
Accompanying drawing explanation
Fig. 1 is that one embodiment of the present of invention controls switching network schematic diagram；
Fig. 2 is one embodiment of the present of invention workflow diagram；
Fig. 3 is that one embodiment of the present of invention realizes natural frequency tuning circuit schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the present invention are described in detail.
The example of described embodiment is shown in the drawings, and the most same or similar label represents identical or class
As element or there is the element of same or like function.The embodiment described below with reference to accompanying drawing is exemplary, only
For explaining the present invention, and it is not construed as limiting the claims.
Following disclosure provides many different embodiments or example for realizing the different structure of the present invention.For letter
Changing disclosure of the invention, hereinafter parts and setting to specific examples are described.They are the most merely illustrative, and purpose is not
It is to limit the present invention.Additionally, the present invention can in different examples repeat reference numerals and/or letter.This repeat be for
Simplify and clearly purpose, itself do not indicate the relation between discussed various embodiment and/or setting.Additionally, this
Bright various specific technique and the example of material of providing, but those of ordinary skill in the art are it can be appreciated that other technique
Applicability and/or the use of other materials.It addition, fisrt feature described below second feature it " on " structure permissible
The embodiment directly contacted is formed as, it is also possible to include that other feature is formed at first and second including the first and second features
Embodiment between feature, such first and second features are not likely to be directly contact.
In description of the invention, it should be noted that unless otherwise prescribed and limit, term " be connected " " connection " should do extensively
Reason and good sense solution, for example, it may be mechanically connected or electrical connection, it is also possible to be the connection of two element internals, can be to be joined directly together,
Can also be indirectly connected to by intermediary, for the those of ordinary skill in phase field, can understand as the case may be
The concrete meaning of above-mentioned term.
The present embodiment adopts the following technical scheme that, natural frequency tuner based on magnetic resonance wireless power transmission, including humorous
Shake coil system；Also include tuning capacity array, tuning coil array and control switching network；Tuning capacity array, tuning electricity
Sense array is connected with resonance coil Cascade System, controls switching network and connects with tuning capacity array, tuning coil array successively
Connect；Switching network is controlled, it is achieved tuning capacity array or tuning coil array access resonance coil system by control word
The control of system.
In above-mentioned natural frequency tuner based on magnetic resonance wireless power transmission, tuning capacity selects EACO company raw
The noninductive electric capacity produced, noninductive capacitance 0.001uF, 0.01uF, 0.0047uF, 0.1uF；Bear voltage be 1200V～
2000V。
In above-mentioned natural frequency tuner based on magnetic resonance wireless power transmission, tuning coil use litz wire around
System；Resonance coil system inductance uses multiply litz wire coiling.
In above-mentioned natural frequency tuner based on magnetic resonance wireless power transmission, control switching network and include audion
And relay；Audion is NPN type triode；G2R-2-5V relay selected by relay, and its contact resistance is 50m Ω, resets
Time, rated current was 106mA at below 20ms, heatproof up to-40 DEG C to 70 DEG C between, per hour operating frequency up to
18000 times.
The control method of natural frequency tuner based on magnetic resonance wireless power transmission, comprises the following steps:
Step 1, the design of control switching network:
Carry out 2 system conversions；N group control switching network make resonance coil system frequency range of accommodation cover 0～
(2N-1) * K kHz, wherein K is the minima changing natural frequency；1 group controls switching network and controls tuning coil；Then N+1 group
Control switching network and control natural frequency-(2N-1) * K～(2N-1) fixed step size regulation is pressed in the range of * K kHz；
Control the normality of switch and be tuning capacity or tuning coil does not access resonance coil system；Connect when controlling switching network
Receiving control word is 0, controls switching network and is failure to actuate；Control word is 1, controls switching network action, makes the tuning capacity of correspondence
Or tuning coil accesses in resonance coil system, thus change the natural frequency of resonance coil system；
Step 2, harmony electric capacity, tuning coil value proportioning:
Use tuning capacity combination and the natural frequency of tuning coil combination regulation resonance coil system, if resonance coil system
System natural frequency is Fg,Wherein LsFor tuning coil value, CsFor tuning capacity value；Tuning capacity series connection makes
Capacitance reduces, natural frequency FgIncrease；Tuning coil series connection makes inductance value increase, natural frequency FgReduce；
Capacitances in series computing formula isInductance series connection computing formula is L=LΙ+LΙΙ；By electric capacity, electricity
Sense series connection computing formula and natural frequency computing formula calculate that natural frequency of sening as an envoy to changes capacitance required during M kHz and electricity
Inductance value；Calculate N group tuning capacity value and change-(2N-1) corresponding for * K kHz tuning coil value, it is achieved natural frequency-
(2N-1) * K～(2N-1) fixed step size regulation is pressed in the range of * K kHz；
Step 3, covering precision and the realization of coverage:
Control switching network to be respectively used to control tuning capacity array and tuning coil array；N+1 group controls switching network
Have 2N+1Plant on off state, the most corresponding 2N+1Plant the result of natural frequency regulation, realize bigger regulation by fixing step-length
The accurate covering of scope；Every kind of on off state changes the natural frequency of K kHz, choosing of K value relative to former on off state
Determined by resonance coil system frequency drift situation；
The selection of step 4, tuning capacity, electric inductance array combination:
The result gathering two groups of control word correspondence natural frequency knots modification contrasts, it is judged that whether respective array is optimum
Solve, if not optimum, then continue to gather, compare, until reaching the optimal solution of resonance coil system cognizant；By detection contrast really
Fixed final tuning capacity, the selection of electric inductance array combination.
Below being embodied as, such as Fig. 1 institute for the present embodiment natural frequency tuner based on magnetic resonance wireless power transmission
Showing, in figure, dotted portion is the control switching network that the present embodiment controls tuning capacity-electric inductance array.Control institute in switching network
Having switch default conditions is connecting valve 2 foot, during i.e. tuning capacity-electric inductance array does not access resonance coil system, therefore not to humorous
Coil system natural frequency of shaking produces impact；When a certain group or a few groups switchs connecting valve 1 foot, i.e. in resonance coil system
Increase tuning capacity combination or the tuning coil combination of this group or these several groups switch correspondences, thus change resonance coil system
Natural frequency.
N+1 group switching network totally 2N+1The state of kind, the most corresponding 2N+1Plant and required resonance coil system frequency is regulated
Result, the accurate covering to relatively wide adjusting range can be realized according to fixing step-length.Control word is 0, controls switching network not
Action；Control word is 1, controls switching network action, makes corresponding tuning capacity, inductance series connection access resonance coil system.
Below with four groups of tuning capacity combinations, one group of tuning coil combination, as a example by five groups control switching network, but it is not limited to
Numeral combination of the above.Natural frequency knots modification table corresponding with control word following (f is resonance coil system frequency, p be 0～
Even number in 9, A～F, q is 0～9, odd number in A～F):
0xqF Yu 0,xp0 two groups is used to judge tuning capacity, electric inductance array values match precision.0xp0 with 0xqF phase
Ratio, only makes one the internal resistance the least of resonance coil Cascade System so that system power changes, and judges values match essence with this
Accuracy.
As in figure 2 it is shown, regulate the workflow of resonance coil system frequency for embodiment.By the result of twice collection
Contrast, judge whether certain an array is optimal solution by contrast, if not optimum, then continue to gather, comparing, until reaching
Optimal solution to resonance coil system cognizant.This embodiment can realize detect-regulate-detecting the mistake of contrast-regulate again again
Journey, determines, by detection contrast, the selection that final tuning capacity, electric inductance array combine.
The present embodiment includes tuning capacity array, tuning coil array and control three major parts of switching network.Such as Fig. 1
Shown in, tuning capacity, electric inductance array are connected with resonance coil Cascade System, control switching network successively with tuning capacity, inductance
Array is connected in series.As shown in Figure 3.
Electric capacity, inductance value to choose and combine be the key of the present embodiment.Meanwhile, the derailing switch that the present embodiment is used
Part, electric capacity, inductance parasitic internal resistance the least, the series resistance of device is less on the impact of magnetic resonance system efficiency, is also this
The major advantage of embodiment.
The control method of the present embodiment described below:
Step one, the design of control switching network:
Any 16 systems all can be converted into 2 system numbers.The most only needing N group to control switching network just can make natural frequency adjust
Adjusting range covers 0～(2N-1) * K kHz, wherein K is the minima changing natural frequency.One group controls on-off control tuning electricity
Sense.Therefore the switching network that the present embodiment comprises N+1 group control switch makes natural frequency-(2N-1) * K～(2N-1)*K
Fixed step size regulation is pressed in the range of kHz.
As it is shown in figure 1, be the connection diagram controlling switching network.Where the dotted line signifies that is to control switching network.When
When resonance coil system need to improve natural frequency, tuning capacity array strings is made to couple into resonance coil system；When resonance coil system
When system needs to reduce natural frequency, make tuning coil combined serial access resonance coil system, then be sequentially connected in series access tuning electricity
Hold.The most often the combination of group tuning capacity and tuning coil combination are sequentially connected in series with controlling switch, and often group tuning combination is successively
It is connected in series access resonance coil system.Controlling switch and be equivalent to single-pole double-throw switch (SPDT), the normality of switch is not by tuning capacity
Or tuning coil accesses resonance coil system.Original state, tuning capacity and inductance the most do not access resonance coil system, not shadow
Ring the work of resonance coil system；When controlling switching network and receiving control word control action, corresponding control switchs saltus step, makes
Obtain tuning capacity or tuning coil accesses in resonance coil system, thus change the natural frequency of resonance coil system.
Step 2, harmony electric capacity, tuning coil value calculate:
The present embodiment uses tuning capacity combination and tuning coil combination to regulate the natural frequency of resonance coil system.False
If resonance coil system inherently frequency is Fg,Wherein LsFor coil inductance, CsFor tuning capacity
Value.Capacitances in series makes capacitance reduce so that resonance coil system frequency increases；Inductance series connection makes inductance value increase, and causes
Resonance coil system frequency reduces.
Capacitances in series computing formula:Inductance series connection computing formula: L=LΙ+LΙΙ.By electric capacity, inductance
Computing formula and natural frequency computing formula can calculate that natural frequency of sening as an envoy to changes capacitance required during M kHz frequency and sense
Value.According to above it will be appreciated that, only N group tuning capacity value and change-(2 need to be calculatedN-1) inductance value corresponding for * K kHz, so that it may realize
Natural frequency is-(2N-1) * K～(2N-1) fixed step size regulation is pressed in the range of * K kHz.
Step 3, covering precision and the realization of coverage:
The control switching network of the present embodiment includes the relay switch network being sequentially connected with, and is respectively used to control tuning electricity
Hold combination array and tuning coil array.N+1 group controls switching network and has 2N+1Plant on off state, the most corresponding 2N+1Plant institute
Need the result that resonance coil system frequency regulates, the accurate covering to relatively wide adjusting range can be realized by fixing step-length.
Every kind of on off state changes the natural frequency of K kHz relative to former on off state, and choosing of K value should be by resonance coil system
Depending on natural frequency drift situation.
Step 4, the choosing of type of device:
The present embodiment, in order to not affect the work of resonance coil system, need to make the internal resistance increased the least, just be unlikely to magnetic
The generation of resonator system efficiency significantly affects.Therefore the switching device that used, electric capacity, inductance parasitic internal resistance the least.
So choosing tuning capacity is the noninductive electric capacity that EACO noninductive electric capacity company of Canada produces.Noninductive electric capacity is permissible
Apply a kind of electric capacity in high-frequency circuit, and do not produce " inductance " effect.The inductance of noninductive electric capacity is the least, especially exists
Under high-frequency work, in order to control natural frequency regulation accurately, need inductance the least.The noninductive capacitance that EACO produces
0.001uF, 0.01uF, 0.0047uF, 0.1uF.And EACO can to bear voltage be 1200V～2000V, resonance coil can be met
System requirements.By calculating, 4 kinds of capacitances obtaining electric capacity calculated above can be come real by the noninductive electric capacity of series and parallel EACO
Existing.
Inductance selects litz wire.Owing to operating frequency is high frequency, so inductive material selects litz wire.Litz wire (litz)
Also known as enamel-covered wire, it is a conductor, is to be formed by the many independent conductor strand insulated or braiding.Typical case's application has: high-frequency electrical
Sensor, transformator, frequency conversion, fuel cell, sensing heating etc..The litz wire using multiply carrys out the resonance coil system electricity of coiling
Sense, can effectively reduce Kelvin effect, reduces resonance coil service system equiva lent impedance.
The relay chosen is Omron G2R-2-5V model power relay, and this kind of relay has conducting internal resistance little, multiple
The advantages such as bit time is short, and rated current is low.Its contact resistance is 50m Ω, and resetting time in below 20ms, rated current is
106mA.This kind of relay heatproof normally works between 70 DEG C up to-40 DEG C, and resistance to impact and shock resistance preferable.Per hour
Operating frequency is up to 18000 times.Meet the demand that application claims internal resistance is little.
It should be appreciated that the part that this specification does not elaborates belongs to prior art.
Although describing the detailed description of the invention of the present invention above in association with accompanying drawing, but those of ordinary skill in the art should
Understanding, these are merely illustrative of, and these embodiments can be made various deformation or amendment, former without departing from the present invention
Reason and essence.The scope of the present invention is only limited by the claims that follow.
Claims (5)
1. natural frequency tuner based on magnetic resonance wireless power transmission, including resonance coil system；It is characterized in that, also include
Tuning capacity array, tuning coil array and control switching network；Tuning capacity array, tuning coil array and resonance coil system
System is connected in series, and controls switching network and is connected in series with tuning capacity array, tuning coil array successively；By control word control
Control switching network, it is achieved tuning capacity array or tuning coil array access the control of resonance coil system.
2. natural frequency tuner based on magnetic resonance wireless power transmission as claimed in claim 1, it is characterised in that tuning electricity
Hold the noninductive electric capacity selecting EACO company to produce, noninductive capacitance 0.001uF, 0.01uF, 0.0047uF, 0.1uF；Bear electricity
Pressure is 1200V～2000V.
3. natural frequency tuner based on magnetic resonance wireless power transmission as claimed in claim 1 or 2, it is characterised in that adjust
Humorous inductance uses litz wire coiling；Resonance coil system inductance uses multiply litz wire coiling.
4. natural frequency tuner based on magnetic resonance wireless power transmission as claimed in claim 1, it is characterised in that control to open
Close network and include audion and relay；Audion is NPN type triode；G2R-2-5V relay selected by relay, its contact
Resistance is 50m Ω, and resetting time, rated current was 106mA at below 20ms, heatproof up to-40 DEG C to 70 DEG C between, per hour
Operating frequency is up to 18000 times.
5. the control method of natural frequency tuner based on magnetic resonance wireless power transmission, it is characterised in that comprise the following steps:
Step 1, the design of control switching network:
Carry out 2 system conversions；N group controls switching network makes resonance coil system frequency range of accommodation cover 0～(2N-1)*K
KHz, wherein K is the minima changing natural frequency；1 group controls switching network and controls tuning coil；Then N+1 group controls switch net
Network controls natural frequency-(2N-1) * K～(2N-1) fixed step size regulation is pressed in the range of * K kHz；
Control the normality of switch and be tuning capacity or tuning coil does not access resonance coil system；Receive when controlling switching network
Control word is 0, controls switching network and is failure to actuate；Control word is 1, controls switching network action, makes tuning capacity or the tune of correspondence
Humorous inductance accesses in resonance coil system, thus changes the natural frequency of resonance coil system；
Step 2, harmony electric capacity, tuning coil value proportioning:
Use tuning capacity combination and the natural frequency of tuning coil combination regulation resonance coil system, if resonance coil system is solid
Having frequency is Fg,Wherein LsFor tuning coil value, CsFor tuning capacity value；Tuning capacity series connection makes electric capacity
Value reduces, natural frequency FgIncrease；Tuning coil series connection makes inductance value increase, natural frequency FgReduce；
Capacitances in series computing formula isInductance series connection computing formula is L=LΙ+LΙΙ；By electric capacity, inductance string
Connection computing formula and natural frequency computing formula calculate that natural frequency of sening as an envoy to changes capacitance required during M kHz and inductance
Value；Calculate N group tuning capacity value and change-(2N-1) corresponding for * K kHz tuning coil value, it is achieved natural frequency is-(2N-
1) * K～(2N-1) fixed step size regulation is pressed in the range of * K kHz；
Step 3, covering precision and the realization of coverage:
Control switching network to be respectively used to control tuning capacity array and tuning coil array；N+1 group controls switching network and has 2N +1Plant on off state, the most corresponding 2N+1Plant the result of natural frequency regulation, realize relatively wide adjusting range by fixing step-length
Precisely cover；Every kind of on off state changes the natural frequency of KkHz, choosing by resonance line of K value relative to former on off state
Circle system frequency drift situation determines；
The selection of step 4, tuning capacity, electric inductance array combination:
The result gathering two groups of control word correspondence natural frequency knots modification contrasts, it is judged that whether respective array is optimal solution,
If not optimum, then continue to gather, compare, until reaching the optimal solution of resonance coil system cognizant；Determined by detection contrast
Final tuning capacity, the selection of electric inductance array combination.
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| CN113381775A (en) * | 2021-06-09 | 2021-09-10 | 珠海市杰理科技股份有限公司 | Tuning method of automatic tuning circuit, automatic tuning circuit and signal transmitting device |
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