CN104578448B - Wireless power transmission device and Wireless power transmission system - Google Patents
Wireless power transmission device and Wireless power transmission system Download PDFInfo
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- CN104578448B CN104578448B CN201410584704.8A CN201410584704A CN104578448B CN 104578448 B CN104578448 B CN 104578448B CN 201410584704 A CN201410584704 A CN 201410584704A CN 104578448 B CN104578448 B CN 104578448B
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Abstract
Electric power is supplied to multiple wireless receiving devices from 1 wireless power transmission device.In the wireless power transmission device of a mode of the disclosure, control the control circuit of transmission conditions when the wireless receiving device in multiple wireless receiving devices is transmitted RF power, when the wireless receiving device in above-mentioned multiple wireless receiving device being detected newly with at least one power transmission antenna electric magnetic coupling above-mentioned, the above-mentioned transmission conditions that change is transmitted with at least one magnetic-coupled wireless receiving device of power transmission antenna electric above-mentioned in above-mentioned multiple wireless receiving devices, change either one of the frequency to the RF power transmitted with at least one magnetic-coupled wireless receiving device of power transmission antenna electric above-mentioned or amplitude, below the restriction voltage of the component that above-mentioned output voltage control is comprised at least one wireless receiving device above-mentioned magnetic-coupled with at least one power transmission antenna electric above-mentioned.
Description
Technical field
It relates to sent in a non contact fashion by the electromagnetic induction between power transmission coil and electricity reception coil
The wireless power transmission device of electric power and Wireless power transmission system.
Background technology
In recent years, in order to take the various mobile devices that telephone set is representative and become increasingly popular.Mobile device
Consume electricity persistently to increase due to function and the raising of performance and the variation of content.Pre-utilizing
The battery of constant volume and in the mobile device that works, it consumes electricity when increasing, the work of this mobile device
Shorten as the time.As the technology of the finite capacity for balancing battery, Wireless power transmission system is subject to
To paying close attention to.Wireless power transmission system is by the power transmission coil of wireless power transmission device and wireless by Denso
Electromagnetic induction between the electricity reception coil put, from wireless power transmission device to wireless receiving device with noncontact
Mode sends electric power.Especially, have employed power transmission coil and the electricity reception coil (oscillating magnetic field of mode of resonance
Coupling) though Wireless power transmission system when mutually staggering in the position of power transmission coil and electricity reception coil
It also is able to maintain high-transmission efficiency, therefore can expect the application in various fields.
For example, as it is known that the Wireless power transmission system of patent documentation 1～3.
Prior art literature
Patent documentation 1: Japanese Unexamined Patent Publication 2010-016985 publication
Patent documentation 2: No. 2012/081519 handbook of International Publication
Patent documentation 3: No. 2012/164744 handbook of International Publication
Summary of the invention
Patent documentation 1～3 disclose only 1 wireless power transmission device with power transmission coil and is subject to having
The common Wireless power transmission system of 1 wireless receiving device transmission electric power of electric coil.
The wireless power transmission device offer one of one mode of the disclosure can be from 1 wireless power transmission device
To wireless power transmission device and the Wireless power transmission system of multiple wireless receiving devices supply electric power.
One mode of the disclosure, is to transmit high frequency to the multiple wireless receiving devices possessing power receiving antenna
The wireless power transmission device of the Wireless power transmission system of electric power, above-mentioned power receiving antenna comprises electricity reception coil,
Above-mentioned wireless power transmission device possesses:
At least one power transmission antenna, it is possible to the power receiving antenna electromagnetism coupling of above-mentioned multiple wireless receiving devices
Close；
One translation circuit, produces above-mentioned RF power and supplies at least one power transmission antenna above-mentioned；
Receive circuit, above-mentioned respectively from each wireless receiving device reception of above-mentioned multiple wireless receiving devices
The output voltage values of electricity reception coil；And
Control circuit, according to the above-mentioned output voltage values received, controls to include from above-mentioned translation circuit
The frequency of the above-mentioned RF power of supply or the transmission conditions of amplitude,
Above-mentioned control circuit,
The 1st wireless receiving device in above-mentioned multiple wireless receiving devices is being transmitted above-mentioned RF power
Time, detect the 2nd above-mentioned wireless receiving device in above-mentioned multiple wireless receiving device new and above-mentioned extremely
During a few power transmission antenna electric magnetic coupling, change in above-mentioned multiple wireless receiving devices with above-mentioned at least
The above-mentioned transmission conditions of one power transmission antenna electric magnetic-coupled wireless receiving device transmission,
Using above-mentioned translation circuit, change is to magnetic-coupled wireless with at least one power transmission antenna electric above-mentioned
The frequency of RF power of current-collecting device transmission or amplitude, will from at least one power transmission antenna electric above-mentioned
Magnetic-coupled at least one wireless receiving device above-mentioned receive above-mentioned output voltage values, control with on
State the circuit that magnetic-coupled at least one wireless receiving device above-mentioned of at least one power transmission antenna electric is comprised
Below the restriction voltage of element.
Additionally, these entirety or concrete mode can be by system, method, integrated circuit, calculating
Machine program or record media implementation, it is also possible to by system, device, method, integrated circuit, computer
The combination in any of program and record medium realizes.
According to aforesaid way, it is possible to from a wireless power transmission device to multiple wireless receiving devices supply electricity
Power.
Accompanying drawing explanation
Fig. 1 is the block diagram of the composition of the Wireless power transmission system representing the 1st embodiment.
Fig. 2 is the block diagram of the example constituted in detail of the wireless receiving device 3-1 representing Fig. 1.
Fig. 3 is the electricity of the power transmission antenna 24a-1 of the 1st variation of the power transmission antenna 24-1 representing Fig. 1
Lu Tu.
Fig. 4 is the electricity of the power transmission antenna 24b-1 of the 2nd variation of the power transmission antenna 24-1 representing Fig. 1
Lu Tu.
Fig. 5 is the electricity of the power transmission antenna 24c-1 of the 3rd variation of the power transmission antenna 24-1 representing Fig. 1
Lu Tu.
Fig. 6 is the top view of the 1st embodiment of power transmission antenna 24-1～24-N representing Fig. 1.
Fig. 7 is the axonometric chart of the example constituted in detail of the position detection lines circle 25 representing Fig. 1.
Fig. 8 is determining of power receiving antenna 31-1 of the position detection lines circle 25 that have employed Fig. 7 for explanation
The axonometric chart of position.
Fig. 9 is the circuit diagram of the example constituted in detail of the load modulation circuit 34-1 representing Fig. 2.
Figure 10 is the composition of the Wireless power transmission system of the 1st variation representing the 1st embodiment
Block diagram.
Figure 11 is to represent that the power transmission performed by the control circuit 20 of the wireless power transmission device 2 of Fig. 1 controls
The flow chart processed.
Figure 12 be the load impedance of wireless receiving device 3-1 and 3-2 representing Fig. 1 equal time be respectively subject to
Output voltage Vr1 and Vr2 of electricity antenna 31-1 and 31-2 and the transmission effect of Wireless power transmission system
The figure of rate.
Figure 13 is that the load impedance of wireless receiving device 3-1 and 3-2 representing Fig. 1 is asynchronous to be respectively subject to
Output voltage Vr1 and Vr2 of electricity antenna 31-1 and 31-2 and the transmission effect of Wireless power transmission system
The figure of rate.
Figure 14 is the block diagram of the composition of the Wireless power transmission system representing the 2nd embodiment.
Figure 15 is the block diagram of the example constituted in detail of the wireless receiving device 3B-1 representing Figure 14.
Figure 16 is the circuit diagram of the example constituted in detail of the load modulation circuit 34B-1 representing Figure 15.
Figure 17 be represent by Figure 15 load modulation circuit 34B-1 produce load modulation signal time
Sequence figure.
Figure 18 is to represent the exemplary load modulation used in the Wireless power transmission system of Figure 14
The sequential chart of the symbol of signal.
Figure 19 is the composition of the Wireless power transmission system of the 2nd variation representing the 1st embodiment
Block diagram.
Figure 20 is the frame of the composition of the Wireless power transmission system of the variation representing the 2nd embodiment
Figure.
Detailed description of the invention
<becoming the opinion on invention basis>
The present inventor is to Wireless power transmission system described in " background technology " hurdle, it was found that
Problem below.
As it was previously stated, patent documentation 1 to 3 disclose only a wireless power transmission with power transmission coil
Device is to the general wireless power transmission of a wireless receiving device transmission electric power with electricity reception coil
System.
In the Wireless power transmission system of existing electromagnetic induction type, possess a RF power source and (become
Change circuit) a wireless power transmission device all the time can only be to wireless receiving device supply electric power.From
And, such as in order to charge, the feeding section of a wireless power transmission device is configured with multiple wireless be subject to
In the case of electric installation, carry out after the charging of wireless receiving device terminates, another wireless being subject to
Electric installation charging is such charges successively.
In the Wireless power transmission system that make use of oscillating magnetic field to couple, power transmission coil and electricity reception coil
The coefficient of coup little, compared with the situation of the Wireless power transmission system of electromagnetic induction type, can pull open
Distance between wireless power transmission device and wireless receiving device and transmit electric power, therefore, it is possible to from a nothing
Multiple wireless receiving devices are charged by line power transmission device.
But, such as, in research from a wireless power transmission device to multiple wireless receiving devices supply electricity
During the Wireless power transmission system of power, need to suppose new add and currently just accepting the wireless of power supply
The wireless receiving device that current-collecting device is different, the above-mentioned wireless receiving device added also accepts electric power and supplies
Situation about giving.
As a solution, if supposing, comprising the multiple wireless of added wireless receiving device is subject to
Electric installation all has identical load characteristic (load impedance), then use wireless by Denso with to one
Put power transmission frequency identical during supply electric power, increase electric power corresponding with the number of wireless receiving device,
Continue to transmit.
But, in general, the different (rechargeable battery of load characteristic of multiple wireless receiving devices
Surplus the most equal).In the case of Gai, it is believed that according to the frequency of the RF power carried or to conversion
The difference of the setting of the input voltage etc. of circuit, it may occur that by electric wire in any one wireless receiving device
The output voltage that circle accepts is too high and exceedes the component of the wireless receiving device being connected with electricity reception coil
The such problem of restriction voltage of (rectification circuit etc.).
The reason of the problems referred to above thinks as follows.
To put it more simply, for example, it is contemplated that carry out to a wireless receiving device from a wireless power transmission device
The situation of power supply.
As the first operation condition, the 1st wireless receiving device has such as 5 Ω (heavy duty: load
Require the state of big electric current) load, it is desirable to electric power is set to 5W.Now, in order to meet above-mentioned wanting
Seek electric power i.e. 5W, by the translation circuit applying 10V voltage to the wireless power transmission device of said one
The RF power (after, be also only called electric power) generated is to above-mentioned 1st wireless receiving device transmission.
Now, the output voltage of the electricity reception coil of above-mentioned 1st wireless receiving device becomes 5V.
Then, as the second operation condition, it is considered to require electric power for example, 0.25W, load be 100 Ω
2nd wireless receiving device of (gently load: the state of load request small area analysis) changes above-mentioned 1st nothing
The situation of line current-collecting device.In the case of Gai, in order to meet the requirement electricity of above-mentioned 2nd wireless receiving device
Power i.e. 0.25W, generates by applying 3V voltage to the translation circuit of above-mentioned wireless power transmission device
Electric power is to above-mentioned 2nd wireless receiving device transmission.Now, above-mentioned 2nd wireless receiving device by electricity
The output voltage of coil also becomes 5V.
But, supplying to multiple wireless receiving devices from a translation circuit of a wireless power transmission device
During to electric power, the power transmission frequency of the electric power exported to power transmission coil from above-mentioned translation circuit is (the most only
Be referred to as frequency) and voltage (can also in other words be referred to as amplitude) be now uniquely determined, it is impossible to be used for
Make multiple wireless receiving device is made above-mentioned change by the most optimized frequency of electricity condition, voltage parameter
Change circuit and carry out action.
Thus, such as to the 1st wireless receiving device supply electric power time so that also to start to the 2nd nothing
During line current-collecting device supply electric power, the 2nd wireless receiving device is allocated to be accepted initially wireless to be subject to the 1st
A part for the electric power of the 10V voltage of electric installation conveying.To the 2nd wireless receiving device transmission 10V
The electric power of voltage time, the output voltage of the electricity reception coil of above-mentioned 2nd wireless receiving device is up to
16.5V.In the case of Gai, the output voltage mistake that electricity reception coil accepts in above-mentioned 2nd wireless receiving device
Height, exceedes the component (rectification circuit of above-mentioned 2nd wireless receiving device being connected with electricity reception coil
Deng) restriction voltage.Its result, the component that above-mentioned 2nd wireless receiving device is comprised may
Destroyed.Here, this value of 16.5V is according under the first operation condition and the second operation condition
The voltage ratio that translation circuit applies is subject to electricity with above-mentioned 2nd wireless receiving device under the second operation condition
(=10V/3V × the 5V) that calculate of the output voltage of coil.
Such as, even if determining the frequency of optimal electric power to the output of power transmission coil and voltage (such as,
3V) to meet the condition of the 2nd lighter wireless receiving device of load, from a wireless power transmission device
A translation circuit to multiple wireless receiving devices supply electric power time, also can only transmit from above-mentioned conversion
The frequency of the electric power that circuit exports to power transmission coil and the certain electric power of voltage.Therefore, to the 2nd nothing
During line current-collecting device transmission electric power, under conditions of above-mentioned 1st wireless receiving device (such as, 10V)
Transmit electric power.Its result, it is believed that to the electric power of lighter the 2nd wireless receiving device excess supply of load,
The output voltage of electricity reception coil uprises.
So, it is believed that the output voltage of the electricity reception coil with the wireless receiving device of light load uprises
One reason is, from a translation circuit of a wireless power transmission device to multiple wireless receiving devices
During supply electric power, can only be at the frequency of the electric power exported to power transmission coil from above-mentioned translation circuit and voltage
Transmit in the case of Yi Ding.
It addition, in above-mentioned example, in order to tackle the proof voltage of the component exceeding wireless receiving device
The problems referred to above, it is considered to use in wireless receiving device and there is the pressure high component of big enough and to spare
Method.But, in this case, owing to using the component of high cost, so cost increases,
It it not the most the solution of reality.
Thus, from possessing a wireless power transmission device of a translation circuit to multiple wireless by Denso
Wireless receiving device when putting supply high frequency electric power and then new and above-mentioned wireless power transmission device electromagnetic coupled
Time, it is desirable to a kind of wireless power transmission device, it controls above-mentioned electric power and transmits so that each is wireless by Denso
The output voltage put is not over the restriction voltage of the component of each wireless receiving device.It addition,
Expect that the cost of the component of above-mentioned wireless receiving device will not increase.
By above investigation, the present inventors expect each mode of invention below.
The wireless power transmission device of one mode of the disclosure,
It it is the wireless power transmission transmitting RF power to the multiple wireless receiving devices possessing power receiving antenna
The wireless power transmission device of system, above-mentioned power receiving antenna comprises electricity reception coil, and above-mentioned wireless power transmission device has
Standby:
At least one power transmission antenna, it is possible to the power receiving antenna electromagnetism coupling of above-mentioned multiple wireless receiving devices
Close；
One translation circuit, produces above-mentioned RF power and supplies at least one power transmission antenna above-mentioned；
Receive circuit, above-mentioned respectively from each wireless receiving device reception of above-mentioned multiple wireless receiving devices
The output voltage values of electricity reception coil；And
Control circuit, according to the above-mentioned output voltage values received, controls to include from above-mentioned translation circuit
The frequency of the above-mentioned RF power of supply or the transmission conditions of amplitude,
Above-mentioned control circuit,
The 1st wireless receiving device in above-mentioned multiple wireless receiving devices is being transmitted above-mentioned RF power
Time, the 2nd above-mentioned wireless receiving device in above-mentioned multiple wireless receiving device being detected is new with above-mentioned
During at least one power transmission antenna electric magnetic coupling, change in above-mentioned multiple wireless receiving devices with above-mentioned extremely
The above-mentioned transmission conditions of few power transmission antenna electric magnetic-coupled wireless receiving device transmission,
Using above-mentioned translation circuit, change is to magnetic-coupled wireless with at least one power transmission antenna electric above-mentioned
Either one of the frequency of RF power of current-collecting device transmission or amplitude, will from above-mentioned at least one give
The above-mentioned output voltage values that electricity magnetic-coupled at least one wireless receiving device above-mentioned of antenna electric receives, control
System is wrapped at least one wireless receiving device above-mentioned magnetic-coupled with at least one power transmission antenna electric above-mentioned
Below the restriction voltage of the component contained.
According to aforesaid way, the 2nd in above-mentioned multiple wireless receiving device being detected above-mentioned wireless is subject to
When electric installation is newly with at least one power transmission antenna electric magnetic coupling above-mentioned, change supplies from above-mentioned translation circuit
The frequency of above-mentioned RF power, amplitude, the waveform of voltage, above-mentioned RF power in certain period
The transmission conditions of density etc., it is possible to prevent due to any one of above-mentioned multiple wireless receiving devices
The increase of the output voltage of electricity reception coil and cause magnetic-coupled extremely with at least one power transmission antenna electric above-mentioned
The component that a few wireless receiving device is comprised is destroyed.
It addition, according to aforesaid way, change in above-mentioned multiple wireless receiving devices with above-mentioned at least one
The frequency of RF power of individual power transmission antenna electric magnetic-coupled wireless receiving device transmission or amplitude arbitrary
Side.Thus, will at least one be wireless by Denso from magnetic-coupled with at least one power transmission antenna electric above-mentioned
Put the above-mentioned output voltage control of reception with at least one power transmission antenna electric magnetic-coupled at least one above-mentioned
Below the restriction voltage of the component that individual wireless receiving device is comprised.Therefore, it is possible to prevent from
It is above-mentioned that magnetic-coupled at least one wireless receiving device above-mentioned of at least one power transmission antenna electric above-mentioned receives
Output voltage exceedes and is comprised with at least one magnetic-coupled wireless receiving device of power transmission antenna electric above-mentioned
The restriction voltage of component.
It addition, according to aforesaid way, as the component of above-mentioned wireless receiving device, it is not necessary to use
Pressure-proof components, thus without the cost of the component increasing above-mentioned wireless receiving device.
Above, according to aforesaid way, it is possible to by the wireless power transmission that make use of oscillating magnetic field to couple
System supplies electric power from a wireless power transmission device to multiple wireless receiving devices.
In aforesaid way, such as, above-mentioned control circuit is to above-mentioned 1st wireless receiving device transmission
During above-mentioned RF power, detect above-mentioned 2nd above-mentioned wireless receiving device new and above-mentioned at least one give
During electricity antenna electric magnetic coupling, above-mentioned transmission conditions can be changed, so that: stop to above-mentioned 1st nothing
Line current-collecting device transmits above-mentioned RF power, maybe by upper than transmit to above-mentioned 1st wireless receiving device
State the little RF power of RF power to above-mentioned 1st wireless receiving device transmission.
According to aforesaid way, by stopping to above-mentioned 1st wireless receiving device transmission RF power, or
By the RF power less than the RF power to above-mentioned 1st wireless receiving device transmission to above-mentioned 1st nothing
Line current-collecting device transmits, it is possible to prevent due to any one electricity reception coil of above-mentioned multiple wireless receiving devices
The increase of output voltage and cause and above-mentioned at least one power transmission antenna electric at least one nothing magnetic-coupled
The component that line current-collecting device is comprised is destroyed.
In aforesaid way, such as, above-mentioned wireless power transmission device is also equipped with position detection lines circle and use
Above-mentioned position detection lines circle detects the above-mentioned power receiving antenna position relative to the relative position of above-mentioned power transmission antenna
Put testing circuit,
Detect above-mentioned 2nd wireless receiving device in above-mentioned multiple wireless receiving device new and above-mentioned at least
One magnetic-coupled method of power transmission antenna electric, is that above-mentioned position detecting circuit uses above-mentioned position detection lines
Circle detects in the above-mentioned power receiving antenna method relative to the relative position of above-mentioned power transmission antenna, or detection
State in multiple wireless receiving device with at least one magnetic-coupled wireless receiving device of power transmission antenna electric above-mentioned
Any one electricity reception coil output voltage change method.
In aforesaid way, such as, above-mentioned control circuit uses above-mentioned translation circuit, and change is to above-mentioned
Multiple wireless receiving devices pass with at least one magnetic-coupled wireless receiving device of power transmission antenna electric above-mentioned
Either one of the frequency of defeated RF power or amplitude, will from at least one power transmission antenna electromagnetism above-mentioned
The above-mentioned output voltage values that at least one wireless receiving device above-mentioned of coupling receives, controls with above-mentioned
The circuit elements that magnetic-coupled at least one wireless receiving device above-mentioned of at least one power transmission antenna electric is comprised
Part limit below voltage and above-mentioned wireless receiving device carries out more than the minimum voltage of action.
In aforesaid way, such as, the above-mentioned 2nd in being judged as above-mentioned multiple wireless receiving device
When wireless receiving device is newly with at least one power transmission antenna electric magnetic coupling above-mentioned,
Use above-mentioned reception circuit, determine the frequency of above-mentioned RF power, the frequency of above-mentioned RF power
It is by from each output received with at least one magnetic-coupled wireless receiving device of power transmission antenna electric above-mentioned
The difference of magnitude of voltage control with above-mentioned restriction voltage and magnetic-coupled with at least one power transmission antenna electric above-mentioned
The predetermined voltage amplitude that the differential pair of the minimum voltage that wireless receiving device carries out action is answered,
Will in above-mentioned multiple wireless receiving devices magnetic-coupled with at least one power transmission antenna electric above-mentioned
Under the state of the frequency that the frequency of the RF power of wireless receiving device transmission is fixed on above-mentioned decision, become
The amplitude of more above-mentioned RF power, wireless will be subject to from magnetic-coupled with at least one power transmission antenna electric above-mentioned
Electric installation receive above-mentioned output voltage values control below above-mentioned restriction voltage and above-mentioned minimum voltage with
On.
According to aforesaid way, decision wireless will be subject to from magnetic-coupled with at least one power transmission antenna electric above-mentioned
The difference of each output voltage that electric installation receives control with above-mentioned restriction voltage and with above-mentioned at least one
It is predetermined that the differential pair of the minimum voltage that the magnetic-coupled wireless receiving device of power transmission antenna electric carries out action is answered
The frequency of above-mentioned RF power of voltage amplitude.Here, predetermined voltage amplitude is than above-mentioned restriction
The value that the difference of voltage and above-mentioned minimum voltage is little.That is, will from at least one power transmission antenna above-mentioned
The above-mentioned output voltage control that the wireless receiving device of electromagnetic coupled receives is below above-mentioned restriction voltage
Time, first, determine the frequency of above-mentioned RF power.Thus, carry out from at least one power transmission above-mentioned
The above-mentioned output voltage that the magnetic-coupled whole wireless receiving devices of antenna electric receive becomes above-mentioned minimum electricity
Press above preparation.In this condition, change the amplitude of above-mentioned RF power, therefore, it is possible to will be from
The above-mentioned output voltage control received with at least one magnetic-coupled wireless receiving device of power transmission antenna electric above-mentioned
System is below above-mentioned restriction voltage and more than above-mentioned minimum voltage.
Above, it is possible to prevent from at least one magnetic-coupled wireless receiving device of power transmission antenna electric above-mentioned
The above-mentioned output voltage received exceedes above-mentioned restriction voltage, and can make and at least one power transmission sky above-mentioned
The whole above-mentioned wireless receiving device of line electromagnetic coupled carries out action.
In aforesaid way, such as, above-mentioned wireless power transmission device is also equipped with storing device, prestores
When transmitting above-mentioned RF power to above-mentioned 1st and the 2nd wireless receiving device from the above-mentioned 1st and the 2nd
The frequency characteristic of the output voltage values that each wireless receiving device of wireless receiving device receives,
Above-mentioned control circuit,
Above-mentioned 2nd wireless receiving device in being judged as above-mentioned multiple wireless receiving device is new with above-mentioned
After at least one power transmission antenna electric magnetic coupling,
The frequency characteristic that can be stored based on above-mentioned storage device, determines for the above-mentioned 1st and the
The frequency of the above-mentioned RF power of 2 wireless receiving device transmission and amplitude.
According to aforesaid way, above-mentioned wireless power transmission device is also equipped with storing device, is stored in advance in upwards
State when the 1st and the 2nd wireless receiving device transmits above-mentioned RF power and wireless be subject to from the above-mentioned 1st and the 2nd
The frequency characteristic of the output voltage that each wireless receiving device of electric installation receives.Above-mentioned control circuit makes
The said frequencies characteristic prestored with above-mentioned storage device, determine above-mentioned RF power frequency and
Amplitude.
According to the manner, it is also possible to determine from magnetic-coupled with said one power transmission antenna electric wireless by electricity
The above-mentioned output voltage that device receives becomes frequency and the amplitude of below above-mentioned restriction voltage.
That is, the said frequencies characteristic that above-mentioned storage device is prestored is used, it was predicted that above-mentioned output electricity
Press to frequency and the amplitude of the above-mentioned RF power of below above-mentioned restriction voltage, therefore, it can ratio and search
Rope determines that above-mentioned output voltage becomes the frequency of the above-mentioned RF power of below above-mentioned restriction voltage quickly
And amplitude.It is as a result, it is possible to start as early as possible to transmit above-mentioned RF power to above-mentioned wireless receiving device.
In aforesaid way, for example, it is also possible to be, above-mentioned wireless power transmission device is also equipped with storing device,
Above-mentioned control circuit in above-mentioned multiple wireless receiving devices at least one the 1st wireless by electricity
When device transmits above-mentioned RF power, the 2nd in above-mentioned multiple wireless receiving device being detected is wireless
When the power receiving antenna of current-collecting device is newly with above-mentioned power transmission antenna electric magnetic coupling,
By comprise above-mentioned translation circuit output voltage, output electric current and operating frequency with above-mentioned conversion
The parameter that the operating state of circuit is relevant is stored in above-mentioned storage device,
Stop to above-mentioned 1st wireless receiving device transmission RF power, maybe will ratio to above-mentioned 1st wireless
The RF power that the RF power of current-collecting device transmission is little transmits to above-mentioned 1st wireless receiving device,
The parameter stored based on above-mentioned storage device, sets for wireless being subject to the above-mentioned 1st and the 2nd
The frequency of the above-mentioned RF power that electric installation transmits simultaneously and amplitude.
In aforesaid way, for example, it is also possible to be, above-mentioned control circuit is by controlling by above-mentioned conversion
At least one party in the phase place of RF power of circuit generation and the dutycycle of above-mentioned translation circuit, sets
The amplitude of above-mentioned RF power.
According to aforesaid way, it is possible to make the transmission of above-mentioned RF power temporarily stop, or temporarily pass
Defeated compare the above-mentioned above-mentioned high frequency detected when above-mentioned wireless receiving device newly couples with above-mentioned power transmission antenna
The RF power that electric power reduces.
It addition, according to aforesaid way, it is possible to reduce the output voltage of above-mentioned each wireless receiving device.
In aforesaid way, for example, it is also possible to be, above-mentioned wireless power transmission device is also equipped with DC/DC
Converter circuit, its generation has the direct current power of variable voltage, supplies to above-mentioned translation circuit,
Above-mentioned control circuit, by controlling the voltage of above-mentioned direct current power, sets shaking of above-mentioned RF power
Width.
According to aforesaid way, it is possible to make the transmission of above-mentioned RF power temporarily stop, or temporarily pass
Defeated than above-mentioned detect that above-mentioned wireless receiving device newly couples with above-mentioned power transmission antenna time above-mentioned high-frequency electrical
The RF power that power reduces.
It addition, according to aforesaid way, it is possible to individually reduced above-mentioned by above-mentioned DC/DC converter circuit
The output voltage of each wireless receiving device.Alternatively, it is also possible to make above-mentioned DC/DC converter circuit and
Above-mentioned translation circuit combines, and reduces the output voltage of above-mentioned each wireless receiving device.
In aforesaid way, such as, above-mentioned wireless power transmission device is also equipped with: multiple power transmission antennas, point
Do not possesses the resonance circuit comprising power transmission coil；On-off circuit, to above-mentioned multiple power transmission antennas at least
One selectively supplies the RF power produced by above-mentioned translation circuit；And
Detection device, power receiving antenna at a wireless receiving device new with in above-mentioned multiple power transmission antennas
At least one power transmission antenna electric magnetic coupling time, detect above-mentioned power receiving antenna relative to above-mentioned multiple power transmissions
The relative position of antenna,
The phase para-position based on the above-mentioned power receiving antenna detected by above-mentioned detection device of above-mentioned control circuit
Put, control said switching circuit to in the power transmission antenna of above-mentioned power receiving antenna electromagnetic coupled
At least one supply high frequency electric power.
In aforesaid way, for example, it is also possible to be, above-mentioned wireless power transmission device possesses a power transmission sky
Line.
In aforesaid way, for example, it is also possible to be, above-mentioned wireless receiving device possesses rechargeable battery,
Accept the supply of RF power from above-mentioned wireless power transmission device, above-mentioned rechargeable battery is charged.
Additionally, above-mentioned mode can also realize as Wireless power transmission system.
The wireless power transmission device of other modes of the disclosure, is to comprise a wireless power transmission device and multiple
The wireless power transmission device of the Wireless power transmission system of wireless receiving device,
Above-mentioned each wireless receiving device possesses power receiving antenna, and it possesses the resonance circuit comprising electricity reception coil,
Above-mentioned wireless power transmission device possesses:
At least one power transmission antenna, has the resonance circuit comprising power transmission coil, each wireless is subject to above-mentioned
The power receiving antenna electromagnetic coupled of electric installation；
Translation circuit, produces and has variable frequency and the RF power of amplitude variable and to above-mentioned power transmission sky
Line supplies；And
Control the control circuit of above-mentioned translation circuit,
Above-mentioned control circuit in above-mentioned multiple wireless receiving devices at least one the 1st wireless by electricity
When device transmits above-mentioned RF power, detect that the in above-mentioned multiple wireless receiving device the 2nd wireless is subject to
When the power receiving antenna of electric installation is newly with above-mentioned power transmission antenna electric magnetic coupling,
The transmission making above-mentioned RF power temporarily stops,
Set above-mentioned RF power for transmitting to above-mentioned 1st and the 2nd wireless receiving device simultaneously
Frequency and amplitude,
Start again at the transmission of above-mentioned RF power.
In aforesaid way, for example, it is also possible to be, above-mentioned wireless power transmission device is also equipped with storing device,
Above-mentioned control circuit in above-mentioned multiple wireless receiving devices at least one the 1st wireless by electricity
When device transmits above-mentioned RF power, detect that the in above-mentioned multiple wireless receiving device the 2nd wireless is subject to
When the power receiving antenna of electric installation is newly with above-mentioned power transmission antenna electric magnetic coupling,
By comprise above-mentioned translation circuit output voltage, output electric current and operating frequency with above-mentioned conversion
The parameter that the operating state of circuit is relevant is stored in above-mentioned storage device,
The transmission making above-mentioned RF power temporarily stops,
The parameter stored based on above-mentioned storage device, sets for wireless being subject to the above-mentioned 1st and the 2nd
The frequency of the above-mentioned RF power that electric installation transmits simultaneously and amplitude.
In aforesaid way, for example, it is also possible to be, above-mentioned wireless power transmission device is also equipped with storing device,
Be stored in advance in when above-mentioned 1st and the 2nd wireless receiving device transmits RF power simultaneously above-mentioned respectively
The frequency characteristic of the output voltage of the power receiving antenna of wireless receiving device,
The frequency characteristic that above-mentioned control circuit is stored based on above-mentioned storage device, sets for above-mentioned
The frequency of the above-mentioned RF power that the 1st and the 2nd wireless receiving device transmits simultaneously and amplitude, so that
The output voltage of the power receiving antenna of above-mentioned each wireless receiving device is less than predetermined threshold value.
In aforesaid way, for example, it is also possible to be, above-mentioned control circuit is by controlling by above-mentioned conversion
At least one party in the phase place of RF power of circuit generation and the dutycycle of above-mentioned translation circuit, sets
The amplitude of above-mentioned RF power.
In aforesaid way, for example, it is also possible to be, above-mentioned wireless power transmission device is also equipped with direct current power
Source, produces the direct current power with variable voltage, supplies to above-mentioned translation circuit,
Above-mentioned control circuit, by controlling the voltage of above-mentioned direct current power, sets shaking of above-mentioned RF power
Width.
In aforesaid way, for example, it is also possible to be, above-mentioned wireless power transmission device is also equipped with:
Multiple power transmission antennas, are respectively provided with the resonance circuit comprising power transmission coil；
On-off circuit, selectively supplies by above-mentioned conversion at least one of above-mentioned multiple power transmission antennas
The RF power that circuit produces；And
Detection device, power receiving antenna at a wireless receiving device new with in above-mentioned multiple power transmission antennas
At least one power transmission antenna electric magnetic coupling time, detect above-mentioned power receiving antenna relative to above-mentioned multiple power transmissions
The relative position of antenna,
The phase para-position based on the above-mentioned power receiving antenna detected by above-mentioned detection device of above-mentioned control circuit
Put, control said switching circuit to in the power transmission antenna of above-mentioned power receiving antenna electromagnetic coupled
At least one supply high frequency electric power.
In aforesaid way, for example, it is also possible to be, above-mentioned wireless power transmission device possesses a power transmission sky
Line.
In aforesaid way, for example, it is also possible to be, above-mentioned wireless receiving device possesses rechargeable battery,
Accept the supply of RF power from above-mentioned wireless power transmission device, above-mentioned rechargeable battery is charged.
It addition, above-mentioned mode can also realize as Wireless power transmission system.
(the 1st embodiment)
Wireless power transmission system hereinafter, with reference to the accompanying drawings of the 1st embodiment of the disclosure.
Fig. 1 is the block diagram of the composition of the Wireless power transmission system representing the 1st embodiment.Fig. 1's
Wireless power transmission system comprise the wireless power transmission device 2 of be connected with continuous-current plant 1 and from
Wireless power transmission device 2 accepts multiple wireless receiving device 3-1 and 3-2 of power supply.
The wireless power transmission device 2 of Fig. 1 possesses control circuit 20, memorizer 20a, DC/DC transducer
Circuit 21, translation circuit 22, on-off circuit 23, power transmission antenna 24-1～24-N, position detection lines circle
25, position detecting circuit 26 and reception circuit 27.DC/DC converter circuit 21 is according to from direct current
The direct current power that supply unit 1 obtains, produces the direct current power with variable voltage, to translation circuit
22 supplies.Translation circuit 22 produce have variable frequency and variable-size (if the frequency of RF power
Necessarily, then the size of RF power is only determined by the amplitude of RF power, therefore, below can also
The size of RF power is replaced with the amplitude of RF power) RF power, via on-off circuit 23
Supply to power transmission antenna 24-1～24-N.The high-frequency electrical that on-off circuit 23 will be produced by translation circuit 22
Power is optionally at least one supply of multiple power transmission antenna 24-1～24-N.Power transmission antenna
24-1～24-N possesses the resonance circuit comprising power transmission coil respectively, with each wireless receiving device 3-1,3-2
Power receiving antenna 31-1,31-2 (described below) electromagnetic coupled.Position detection lines circle 25 and position inspection
Slowdown monitoring circuit 26 is new in the power receiving antenna of a wireless receiving device and in power transmission antenna 24-1～24-N extremely
During a few power transmission antenna electric magnetic coupling, detection power receiving antenna is relative to power transmission antenna 24-1's～24-N
Position relatively.Receive circuit 27 to the consumption electric power variation by making wireless receiving device 3-1,3-2
And the load modulation signal being sent to wireless power transmission device 1 from wireless receiving device 3-1,3-2 is carried out
Receive and demodulate.Control circuit 20 controls the direct current power produced by DC/DC converter circuit 21
Voltage, translation circuit 22 frequency of RF power produced and size and by on-off circuit 23
The translation circuit 22 carried out and the connection of power transmission antenna 24-1～24-N.Memorizer 20a is stored in reference
During power transmission control described below for Figure 11 processes, the parameter relevant to the operating state of translation circuit 22 (is sent
Electrical quantity).
Control circuit 20 is in order to control the amplitude (size) of RF power, it is possible to so that by DC/DC
The change in voltage of the direct current power that converter circuit 21 produces.It addition, control circuit 20 is in order to control
The amplitude (size) of RF power, it is also possible to control the phase of the RF power produced by translation circuit 22
At least one party of the dutycycle of position and translation circuit 22.
The wireless receiving device 3-1 of Fig. 1 possesses power receiving antenna 31-1, parasite power supplier 32-1 and load dress
Put 33-1.Power receiving antenna 31-1 has the resonance circuit comprising electricity reception coil, with power transmission antenna
At least one power transmission antenna 24-1 electromagnetic coupled in 24-1～24-N.Multiple wireless by Denso when existing
When putting, the power receiving antenna such as one_to_one corresponding of power transmission antenna 24-1～24-N and each wireless receiving device.
The parasite power supplier 32-1 RF power to receiving from wireless power transmission device 2 via power receiving antenna 31-1
Carry out rectification and smoothing, and supply to load device 33-1.Load device 33-1 e.g. charges
Battery.When load device 33-1 is rechargeable battery, wireless receiving device 3-1 is from wireless power transmission device
2 supplies accepting RF power, charge to rechargeable battery.
Fig. 2 is the block diagram of the example constituted in detail of the wireless receiving device 3-1 representing Fig. 1.By electricity
Circuit 32-1 possesses load modulation circuit 34-1, rectification circuit 35-1, monitoring circuit 36-1, control
Circuit 37-1 and transtation mission circuit 38-1.Load modulation circuit 34-1 is connected with power receiving antenna 31-1,
Under the control of transtation mission circuit 38-1, produce by making the consumption electric power variation of wireless receiving device 3-1
Load modulation signal.Rectification circuit 35-1 connects from wireless power transmission device 2 via power receiving antenna 31-1
The electric power being subject to carries out rectification and smoothing, and supplies to load device 33-1.Monitoring circuit 36-1
Monitor the power consumption of load device 33-1, want it addition, accept the electric power from load device 33-1
Ask (increase and decrease of power supply or stopping etc.), and notify control circuit 37-1.Control circuit 37-1 root
Transtation mission circuit 38-1, transtation mission circuit 38-1 is controlled in control according to the notification signal from monitoring circuit 36-1
Under the control of circuit 37-1 processed, load modulation circuit 34-1 is used to produce load modulation signal.
The wireless receiving device 3-2 of Fig. 1 also equally constitutes with wireless receiving device 3-1.
Fig. 3 is the electricity of the power transmission antenna 24a-1 of the 1st variation of the power transmission antenna 24-1 representing Fig. 1
Lu Tu.It is humorous that the power transmission antenna 24a-1 of Fig. 3 has the series connection comprising power transmission coil L1 and capacitor C1
Shake circuit.Fig. 4 is the power transmission antenna 24b-1 of the 2nd variation of the power transmission antenna 24-1 representing Fig. 1
Circuit diagram.The power transmission antenna 24b-1 of Fig. 4 has and comprises power transmission coil L1 and capacitor C2 also
Connection resonance circuit.Fig. 5 is the power transmission antenna of the 3rd variation of the power transmission antenna 24-1 representing Fig. 1
The circuit diagram of 24c-1.The power transmission antenna 24c-1 of Fig. 5 has and comprises the electricity connected with power transmission coil L1
Container C1 and the resonance circuit of the capacitor C2 in parallel with power transmission coil L1.The power transmission of Fig. 3～Fig. 5
The variation of antenna 24-1 also is able to be applicable to other power transmission antenna 24-2～24-N.
The variation of the power transmission antenna 24-1 of Fig. 3～Fig. 5 also be able to be applicable to each wireless receiving device 3-1,
Power receiving antenna 31-1 of 3-2,31-2.
The RF power produced by translation circuit 22 has can be at power transmission antenna 24-1～24-N and by electricity
The frequency passed through between antenna 31-1,31-2.Generally, power transmission antenna 24-1～24-N is in order to make high frequency
Electric power by and there is the resonant frequency equal with the frequency of RF power.But, if RF power leads to
Cross, then the frequency of RF power and the resonant frequency of power transmission antenna 24-1～24-N can also be inconsistent.
Equally, power receiving antenna 31-1,31-2 in order to make RF power by and there is the frequency with RF power
Equal resonant frequency.But, if RF power passes through, then the frequency of RF power and power receiving antenna
The resonant frequency of 31-1,31-2 can also be inconsistent.
Then, with reference to Fig. 6～Fig. 8, the position detection lines circle 25 of explanatory diagram 1 and position detecting circuit
The action of 26.
Fig. 6 is the top view of the 1st embodiment of power transmission antenna 24-1～24-N representing Fig. 1.Fig. 6
Extending by multiple power transmission antenna 24-1～24-N are carried out 2 dimension configurations can the scope of power transmission.?
In Fig. 6, exemplified with the situation that power transmission coil is circular coil of power transmission antenna, but it is not limited to this,
Power transmission coil can also be square, rectangle, circle, oval, oval, the coil of other shapes.
Especially, the power transmission coil of square and rectangle can reduce the gap between power transmission coil, and having can
Reduce scope this advantage weak with the electromagnetic coupled of electricity reception coil.It addition, power transmission coil can be in spiral shell
Rotation shape winds or winds in spiral shape.
Wireless power transmission device 2 is newly joined at a wireless receiving device (such as wireless receiving device 3-1)
When putting on wireless power transmission device 2, in order to select to transmit the suitableeest of electric power to wireless receiving device 3-1
When power transmission antenna, detection wireless receiving device 3-1 position.Thus, position detecting circuit 26 to
Position detection lines circle 25 sends detection pulse, detects by power receiving antenna 31-1 of wireless receiving device 3-1
The voltage reflected or electric current, thus detection power receiving antenna 31-1.Position detection lines circle 25 is
Can accurately detect the position of power receiving antenna 31-1, be arranged on and more lean on than power transmission antenna 24-1～24-N
The position of nearly wireless receiving device 3-1.
Fig. 7 is the axonometric chart of the example constituted in detail of the position detection lines circle 25 representing Fig. 1.Position
Detection coil 25 is included in detection coil 25a～25d of Y-direction length and at the detection line of X-direction length
Circle 25e～25i.Detection coil 25a～25d configures at equal intervals in X-direction, detects coil 25e～25i
Configure the most at equal intervals.
Fig. 8 is determining of power receiving antenna 31-1 of the position detection lines circle 25 that have employed Fig. 7 for explanation
The axonometric chart of position.In fig. 8, in order to simplify diagram, omit detection coil 25e～25i of Fig. 7.First
First, position detecting circuit 26 sends detection pulse to detection coil 25a, and detection is by power receiving antenna 31-1
The voltage reflected or electric current, store its intensity (hereinafter referred to as " reflex strength ").Then,
Position detecting circuit 26 sends detection pulse to detection coil 25b, detects by power receiving antenna 31-1 equally
The voltage reflected or electric current, store its intensity.Same below, position detecting circuit 26 is to inspection
Test coil 25c, 25d send detection pulse.Position detecting circuit 26 compare stored from each inspection
The reflex strength of test coil 25a～25d, such as, will obtain the seat of the detection coil of maximum reflection intensity
Mark is determined as the X-coordinate of power receiving antenna 31-1.Equally, position detecting circuit 26 is to detection coil
25e～25i sends detection pulse, determines the Y coordinate of power receiving antenna 31-1.
The position informing control circuit 20 of power receiving antenna 31-1 that position detecting circuit 26 will detect.
Control circuit 20 is based on the power receiving antenna detected by position detection lines circle 25 and position detecting circuit 26
The relative position of 31-1, control on-off circuit 23 to power receiving antenna 31-1 electromagnetic coupled
Power transmission antenna at least one supply high frequency electric power.
The composition of position detection lines circle 25 is not limited to shown in Fig. 7.In fig. 7 it is shown that in X side
To configuration 4 detection coil 25a～25d, the example of configuration 5 detection coil 25e～25i in the Y direction
Son, but the combination of other numbers can also be used according to the scope that power receiving antenna is detected.
If without the Y coordinate determining power receiving antenna 31-1, then can also omit detection coil 25e～25i.Separately
Outward, in Fig. 7 and Fig. 8, detection coil 25a～25i is expressed as the coil of 1 circle, but detects
Coil can also be the coil of more than 2 circles.By increasing the number of turn, it is possible to strengthen detection coil and by electricity
The coupling of antenna 31-1, has the effect improving reflex strength.It addition, in Fig. 7 and Fig. 8, will
Detection coil 25a～25i is expressed as square coil, but detection coil can also be square, circular,
Oval, oval, other coil shapes.
In order to improve the precision of position detection, position detecting circuit 26 obtains maximum reflection except using
The detection coil of intensity, it is possible to use the multiple detection coils near selected detection coil anti-
Penetrate intensity, determine the coordinate of power receiving antenna 31-1.
Fig. 9 is the circuit diagram of the example constituted in detail of the load modulation circuit 34-1 representing Fig. 2.Negative
Carry modulation circuit 34-1 possess: be connected in series in the electricity reception coil of power receiving antenna 31-1 two ends 2
Individual capacitor and being connected so that making under the control of transtation mission circuit 38-1 with the midpoint of these capacitors
The midpoint of these capacitors switch SW selectively grounded.2 capacitors have the most equal
Electric capacity Cm.The little data signal arrived from transtation mission circuit 38-1 transmission of the electric capacity Cm of 2 capacitors
Frequency (frequency of such as 100kHz frequency range) the indeclinable degree (such as 100pF etc.) of carrier wave.
By on-off switch SW, the amplitude variations of the carrier wave of data signal, produce load modulation signal.From
And, load modulation circuit 34-1 carries out action as Modulation and Amplitude Modulation circuit.
Figure 10 is the frame of the composition of the Wireless power transmission system of the 1st variation representing the 1st embodiment
Figure.The wireless power transmission device of the present embodiment can also replace multiple power transmission antenna and only possess one and send
Electricity antenna.The wireless power transmission device 2A of Figure 10 replaces the on-off circuit of the wireless power transmission device 2 of Fig. 1
23 and power transmission antenna 24-1～24-N and possess a power transmission antenna 24A.It addition, wireless power transmission device
2A does not possess position detection lines circle 25 and the position detecting circuit 26 of the wireless power transmission device 2 of Fig. 1,
Replace the control circuit 20 of Fig. 1 and possess control circuit 20A.Each wireless receiving device 3-1,3-2
Power receiving antenna 31-1,31-2 and power transmission antenna 24A electromagnetic coupled.Power transmission antenna 24A except with
Beyond multiple power receiving antenna electromagnetic coupled, with the power transmission antenna with reference to Fig. 1, Fig. 3～Fig. 5 explanation
24-1～24-N, 24a-1～24c-1 equally constitute.When the load of translation circuit 22 there occurs change,
Control circuit 20A detects and is configured with wireless receiving device.
Figure 19 is the composition of the Wireless power transmission system of the 2nd variation representing the 1st embodiment
Block diagram.The wireless power transmission device of present embodiment can not also possess DC/DC converter circuit 21.
The wireless power transmission device 2C of Figure 19 has removing DC/DC from the wireless power transmission device 2A of Figure 10
Converter circuit 21, replaces control circuit 20A of Figure 10 and power transmission antenna 24A and possesses control electricity
Road 20C and the composition of power transmission antenna 24C.The control of control circuit 20C is produced by translation circuit 22
The frequency of RF power and size.Control circuit 20C in order to control the amplitude (size) of RF power,
The phase place of RF power and the dutycycle of translation circuit 22 produced by translation circuit 22 can also be controlled
At least one party.Power transmission antenna 24C equally constitutes with power transmission antenna 24A.
As it was previously stated, be supplied simultaneously to multiple wireless receiving device 3-1,3-2 at wireless power transmission device 2
During electric power, need to control electric power transmission, so that not over each wireless receiving device 3-1,3-2
The restriction voltage of component.Thus, the control circuit 20 of wireless power transmission device 2 performs Figure 11's
Power transmission control processes.
Figure 11 is that the power transmission control performed by the control circuit 20 of the wireless power transmission device 2 of Fig. 1 processes
Flow chart.Below, it is assumed that load device 33-1,33-2 of wireless receiving device 3-1,3-2 are for filling
Electricity battery.In step sl, control circuit 20 judges to be examined by position detection lines circle 25 and position
Whether slowdown monitoring circuit 26 detects wireless receiving device, and then, based on the communication with wireless receiving device
The information obtained, it is judged that whether this wireless receiving device requires charging.The nothing requiring charging detected
During line current-collecting device, enter step S2, otherwise repeat step S1.In step s 2, control circuit
20 judge whether to require multiple wireless receiving devices of charging, enter step S8, "No" during "Yes"
Time enter step S3.
In step S3 of Figure 11, control circuit 20 is when carrying out the detection of step S1, with in the past
The number of wireless receiving device compare, it is judged that require whether the number of the wireless receiving device of charging deposits
In variation, during "Yes", enter step S4, during "No", enter step S5.
In step s 4, control circuit 20 sets and comprises the output voltage of translation circuit 22, output
The parameter (power transmission parameter) that the operating state to translation circuit 22 of electric current and operating frequency is relevant.Deposit
Reservoir 20a is stored in advance in this wireless receiving device when certain wireless receiving device transmission RF power
The frequency characteristic of output voltage of power receiving antenna.For the wireless receiving device both deposited, it is subject to
The frequency characteristic of output voltage of electricity antenna when the manufacture of wireless power transmission device 2 or use start before pre-
It is first stored in memorizer 20a.New wireless by electricity for occur after the manufacture of wireless power transmission device 2
For device, control circuit 20 finds (changing the frequency of RF power or the same of size adaptively
Shi Faxian optimum) or the output of power receiving antenna of new wireless receiving device is obtained by additive method
The frequency characteristic of voltage, and it is stored in memorizer 20a.The frequency being temporarily stored in memorizer 20a is special
Can use when being configured with identical wireless receiving device after property.Control circuit 20 is based on memorizer
The frequency characteristic that 20a is stored, is additionally based upon the information (load obtained that communicates with wireless receiving device
The state etc. of device), set frequency and the size of the RF power produced by translation circuit 22, so that
Obtain the output voltage of power receiving antenna of wireless receiving device less than predetermined threshold value.
Control circuit 20 is by controlling the phase place of RF power, the conversion electricity that are produced by translation circuit 22
In the dutycycle on road 22 and the voltage of direct current power that produced by DC/DC converter circuit 21
At least one, set the amplitude (size) of RF power.That is, (big in order to control the amplitude of RF power
Little), it is possible to use DC/DC converter circuit 21 and this two side of translation circuit 22.
It addition, for the amplitude (size) controlling RF power, it is also possible to do not use DC/DC to change
Device circuit 21 and only use translation circuit 22.In the case of Gai, the control circuit 20 of Fig. 1, Figure 10
Control circuit 20A or control circuit 20C of Figure 19 produced by translation circuit 22 by controlling
The phase place of RF power, translation circuit 22 dutycycle at least 1, set the shaking of RF power
Width (size).
Amplitude (size) according to the RF power set by step S4, it is possible to make above-mentioned RF power
Transmission temporarily stop (amplitude 0), or transmission is compared and above-mentioned wireless receiving device detected above-mentioned
The RF power that above-mentioned RF power when newly coupling with above-mentioned power transmission antenna temporarily reduces.It addition,
Now, it is possible to reduce the output voltage of above-mentioned each wireless receiving device.
In step s 5, control circuit 20 by step S4 set under conditions of by translation circuit 22
Produce RF power and in the range of predetermined certain time power transmission.But, in step S3
During for "No", in step s 5, by translation circuit under conditions of the former setting of control circuit 20
22 produce RF power and continue power transmission.The wireless receiving device of charging complete uses load modulation letter
Number to wireless power transmission device 2 send represent charging complete charging completion signal.In step s 6,
Control circuit 20 judges whether to receive charging completion signal (filling of rechargeable battery from wireless receiving device
Whether electricity completes), enter step S7 when "Yes", during "No", return step S1.In step S7
In, control circuit 20 stops the transmission of RF power, returns step S1.
In step S8 of Figure 11, control circuit 20 determination requirement charging wireless receiving device
Whether number changes, and enters step S9 during "Yes", enters step S13 during "No".When step S8 is
During "Yes", represent at least one wireless receiving device in multiple wireless receiving devices (such as
Wireless receiving device 3-1) transmission RF power time, detect in multiple wireless receiving device other
The power receiving antenna of wireless receiving device (such as wireless receiving device 3-2) is new and power transmission antenna electromagnetism coupling
Situation about closing.In step s 9, control circuit 20 judges the wireless receiving device 3-1 that both deposited whether
During being in power transmission, enter step S10 when "Yes", during "No", enter step S12.In step
In S10, control circuit 20 is by parameter (power transmission parameter) storage relevant for the operating state of translation circuit
In memorizer 20a.In step s 11, control circuit 20 temporarily ceases the transmission of RF power.
In step s 12, the power transmission parameter that control circuit 20 is stored based on memorizer 20a, also
Based on the information (state etc. of load device) obtained that communicates with wireless receiving device, reset power transmission
Parameter (especially for the frequency when wireless receiving device 3-1,3-2 transmit RF power simultaneously and
Size).Memorizer 20a prestores and transmits RF power to wireless receiving device 3-1,3-2 simultaneously
Time each power receiving antenna 31-1, the frequency characteristic of output voltage of 31-2.Control circuit 20 is further
The frequency characteristic stored with reference to memorizer 20a, sets for same to wireless receiving device 3-1,3-2
Time the frequency of the RF power produced by translation circuit 22 of transmission and size so that each power receiving antenna
The output voltage of 31-1,31-2 is less than predetermined threshold value.
In step s 13, under conditions of being set by step S12, be there is high frequency by translation circuit 22
Electric power, transmits RF power in the range of predetermined certain time.But, it is "No" in step S8
Time, in step s 13, produced by translation circuit 22 under conditions of the former setting of control circuit 20
RF power also continues power transmission.The wireless receiving device of charging complete uses load modulation signal to nothing
Line power transmission device 2 sends the charging completion signal representing charging complete.In step S14, it is judged that be
No it be newly received charging completion signal from any one wireless receiving device and (that is, accept the nothing of power supply
Whether the number of line current-collecting device there occurs variation), enter step S15 when "Yes", during "No"
Return step S1.In step S15, control circuit 20 judges to fill in whole wireless receiving devices
Whether the charging of electricity battery completes, and enters step S16 when "Yes", returns step S10 during "No".
In step s 16, control circuit 20 stops the transmission of RF power, returns step S1.
Filled by control circuit 20A of the wireless power transmission device 2A of Figure 10 and the wireless power transmission of Figure 19
Putting control circuit 20C of 2C, the power transmission control being able to carry out Figure 11 equally processes.
Power transmission control according to Figure 11 processes, and wireless power transmission device 2 is by prestoring to wireless by electricity
Each power receiving antenna 31-1 when device 3-1,3-2 transmit RF power simultaneously, the output voltage of 31-2
Frequency characteristic and use on wireless power transmission device 2 before newly configured wireless receiving device 3-2 with nothing
The parameter that the operating state of the translation circuit 22 of line power transmission device 2 is relevant, sets by translation circuit 22
The frequency of the RF power produced and size, so that the output voltage of each power receiving antenna 31-1,31-2
Less than predetermined threshold value.
Figure 12 be the load impedance of wireless receiving device 3-1 and 3-2 representing Fig. 1 equal time respectively by electricity
Output voltage Vr1 and Vr2 of antenna 31-1 and 31-2 and the efficiency of transmission of Wireless power transmission system
Figure.Figure 13 is that the load impedance of wireless receiving device 3-1 and 3-2 representing Fig. 1 is asynchronous respectively
Output voltage Vr1 and Vr2 of power receiving antenna 31-1 and 31-2 and the transmission of Wireless power transmission system
The figure of efficiency.In fig. 13, wireless receiving device 3-2 has 5 times of wireless receiving device 3-1
Load impedance.Now, according to the difference of frequency, the output voltage Vr1 of power receiving antenna 31-1 with by electricity
The output voltage Vr2 of antenna 31-2 compares the highest, it is possible to exceed the electricity of wireless receiving device 3-2
The restriction voltage of circuit component.
So, the output voltage of wireless receiving device 3-1 is in the power receiving antenna of wireless receiving device 3-2
Change with after the power transmission antenna electric magnetic coupling of wireless power transmission device.In the case of Gai, wireless by electricity
The output voltage of device 3-1 uprises.Thus, if detecting and accepting supply from a wireless power transmission device
The change of output voltage of any one wireless receiving device, then may determine that as wireless receiving device new
With above-mentioned power transmission antenna electric magnetic coupling.
Carrying out electric power to multiple wireless receiving device 3-1,3-2 from a wireless power transmission device 2 simultaneously
During supply, in order to prevent power receiving antenna 31-1, the output voltage of 31-2 exceed each wireless receiving device 3-1,
The restriction voltage of the component of 3-2, needs the output voltage of reduction power receiving antenna 31-1,31-2
Difference.As can be seen from Figure 13, even if when load impedance difference, power receiving antenna 31-1, the output of 31-2
The frequency range that the difference of voltage diminishes there is also.Thus, the control circuit 20 of wireless power transmission device 2 set by
The frequency of the RF power that translation circuit 22 produces, to reduce the output of power receiving antenna 31-1,31-2
The difference of voltage.In the case of fig. 13, the RF power produced by translation circuit 22 by raising
Frequency (such as it is set to 130～134kHz: but, when being set to altofrequency, efficiency of transmission reduced),
Or reduce the voltage of the direct current power produced by DC/DC converter circuit 21, it is possible to prevent by electricity sky
The output voltage of line 31-1,31-2 exceedes the restriction of the component of each wireless receiving device 3-1,3-2
Voltage.
Frequency can also be made from high frequency when setting the frequency of the RF power produced by translation circuit 22
Rate finds optimum frequency while being gradually lowered.Alternatively, it is also possible to setting by DC/DC transducer
During the voltage of direct current power that circuit 21 produces, while low-voltage is gradually increased, find optimal electricity
Pressure.
<the 2nd embodiment>
Wireless power transmission system hereinafter, with reference to the accompanying drawings of the 2nd embodiment of the disclosure.
Figure 14 is the block diagram of the composition of the Wireless power transmission system representing the 2nd embodiment.The nothing of Fig. 1
Line electrical power transmission system comprise the wireless power transmission device 2B of be connected with continuous-current plant 1 and from
Wireless power transmission device 2B accepts multiple wireless receiving device 3B-1 and 3B-2 of power supply.
The wireless power transmission device 2B of Figure 14 is in addition to the composition of the wireless power transmission device 2 of Fig. 1, also
Possesses transtation mission circuit 28, it addition, replace the control circuit 20 of Fig. 1 and possess control circuit 20B.
Control circuit 20B determines that wireless power transmission device 2B and multiple wireless receiving device 3B-1,3B-2 are common
Time slot, produce represent this time slot timing signal.Transtation mission circuit 28 is via power transmission antenna 24-1～24-N
The control signal comprising timing signal is sent to wireless receiving device 3B-1,3B-2.
The wireless receiving device 3B-1 of Figure 14 replaces the parasite power supplier of the wireless receiving device 3-1 of Fig. 1
32-1 and possess parasite power supplier 32B-1.
Figure 15 is the block diagram of the example constituted in detail of the wireless receiving device 3B-1 representing Figure 14.Figure
The parasite power supplier 32B-1 of 15, in addition to the composition of the parasite power supplier 32-1 of Fig. 2, is also equipped with receiving
Circuit 39-1, it addition, replace the load modulation circuit 34-1 of Fig. 2, control circuit 37-1 and send electricity
Road 38-1 and possess load modulation circuit 34B-1, control circuit 37B-1 and transtation mission circuit 38B-1.
Receive circuit 39-1 and receive the control letter sent from wireless power transmission device 2B via power receiving antenna 31-1
Number.Load modulation circuit 34B-1 is connected with power receiving antenna 31-1, by with the 1st frequency f1 (such as
2kHz) or 2nd frequency f2 (such as 5kHz) higher than the 1st frequency f1 makes wireless receiving device 3B-1
Consumption electric power variation, thus carry out load modulation.Transtation mission circuit 38-1B is in control circuit 37B-1
Control under, use load modulation circuit 34B-1, produce have the 1st frequency f1 the 1st load adjust
Signal processed and there is any one of the 2nd load modulation signal of the 2nd frequency f2.Control circuit 37B-1
According to the notification signal from monitoring circuit 36-1 and by receiving the control signal that circuit 39-1 receives,
Control transtation mission circuit 38B-1, to produce any one of the 1st and the 2nd load modulation signal.
Figure 16 is the circuit diagram of the example constituted in detail of the load modulation circuit 34B-1 representing Figure 15.
Load modulation circuit 34B-1 possesses: comprise 2 capacitors and the switch SW1 with electric capacity Cm1
The 1st circuit part, and comprise have electric capacity Cm2 2 capacitors and switch SW2 the 2nd
Circuit part.In the 1st circuit part, 2 capacitors are connected in series in being subject to of power receiving antenna 31-1
The two ends of electric coil, switch SW1 is connected with the midpoint of these capacitors, so that these capacitors
Midpoint under the control of transtation mission circuit 38B-1 selectively grounded.In the 2nd circuit part, 2
Individual capacitor is connected in series in the two ends of the electricity reception coil of power receiving antenna 31-1, switch SW2 and these
The midpoint of capacitor connects, so that the midpoint of these capacitors is under the control of transtation mission circuit 38B-1
Selectively grounded.Electric capacity Cm1, Cm2 of each capacitor are little to be sent to from transtation mission circuit 38B-1
The degree that do not changes of the frequency (frequency of such as 100kHz frequency range) of carrier wave of data signal
(such as 100pF etc.).
When with high frequency modulation carrier wave, it is possible to carry out the data transmission (number of time per unit at a high speed
Increase according to amount), on the other hand, the electric power of every 1 bit diminishes (electric power of per unit quantity of information reduces).
Thus, signal to noise ratio (SNR) reduces, communication instability, there is the probability that the demodulation of data is failed.
Thus, in load modulation circuit 34B-1, the modulation degree (Modulation and Amplitude Modulation of the 2nd load modulation signal
In the rate of change of amplitude) be set to bigger than the modulation degree of the 1st load modulation signal.Now, electricity
Hold Cm2 and be set bigger than electric capacity Cm1.By using such modulation degree, it is possible to it is more accurate to carry out
Data transmission, even if it addition, electricity between power transmission antenna 24-1～24-N and power receiving antenna 31-1
Also there is when magnetic coupling is weak the effect of the stability improving communication.
The wireless receiving device 3B-2 of Figure 14 also equally constitutes with wireless receiving device 3B-1.Wireless it is subject to
Electric installation 3B-1,3B-2 are by possessing above composition, at multiple wireless receiving device 3B-1,3B-2
When being communicated with wireless power transmission device 2B by load modulation signal, it is possible to use the load of different frequency
Modulated signal (is such as, frequency f1, at wireless receiving device 3B-2 in wireless receiving device 3B-1
In for frequency f2) communicate simultaneously.
Figure 17 be represent by Figure 15 load modulation circuit 34B-1 produce load modulation signal time
Sequence figure.As it was previously stated, by control circuit 20B of wireless power transmission device 2B, determine wireless power transmission
Device 2B and the common time slot of multiple wireless receiving device 3B-1,3B-2.Such as, wireless by electricity
Device 3B-1 uses has the 1st load modulation signal (the 1st section of Figure 17) of frequency f1 with wireless
Power transmission device 2B communicates, and wireless receiving device 3B-2 uses the 2nd load modulation letter with frequency f2
When number (the 2nd section of Figure 17) communicates with wireless power transmission device 2B, if each load modulation signal is upper
The moment rising edge or drop edge is consistent, it is likely that communication mistake occurs.Thus, wireless power transmission
Control circuit 20B of device 2B is by so that the waveform of the 1st and the 2nd load modulation signal is at each time slot
In mutually different moment there is the control signal that the mode of rising edge and drop edge carries out indicating,
Send to each wireless receiving device 3B-1,3B-2.The control of each wireless receiving device 3B-1,3B-2
Any one of circuit controls transtation mission circuit 38B-1 according to control signal, to the 1st and the 2nd
Any one of load modulation signal gives the skew (the 3rd section of Figure 17) postponed.
Load modulation signal to frequency f2 described further below (wireless receiving device 3B-2) gives
The example during skew postponed.Wireless receiving device 3B-1 (frequency f1) is being arranged in wireless sending
After on electric installation 2, wireless receiving device 3B-2 (frequency f2) is arranged on wireless power transmission device 2
Time, wireless power transmission device 2 identifies the timing sending the 1st load modulation signal (frequency f1) in advance.
Thus, in the case of being somebody's turn to do, wireless power transmission device 2 sends the inclined of additional delay to wireless receiving device 3-2
The timing signal moved, so that staggering with the timing sending the 2nd load modulation signal (frequency f2).
On the other hand, it is subject to wireless after wireless receiving device 3B-2 is arranged on wireless power transmission device 2
When electric installation 3B-1 is arranged on wireless power transmission device 2, wireless power transmission device 2 is receiving the 1st load
Modulated signal and detect send the 1st load modulation signal timing after, to wireless receiving device 3-2
Send the timing signal of the skew that addition of delay.In the case of Gai, wireless power transmission device 2 can also be
Wireless receiving device 3B-2 is arranged in the period on wireless power transmission device 2 all the time to wireless receiving device
3B-2 sends timing signal, when receiving 1 load modulation signal, to wireless receiving device 3-2
Send the timing signal of the skew that addition of delay.Thus, have and realize wireless power transmission device effectively
The effect of the communication of 2 and wireless receiving device 3B-2.Even if it addition, wireless receiving device 3B-2 joins
Putting on wireless power transmission device 2, wireless power transmission device 2 can also be until configuring wireless receiving device
Till 3B-1, suppress to send timing signal to wireless receiving device 3B-2.Thus, there is minimizing to disappear
The effect of power consumption power.Additionally, be not limited to the above embodiments, equally use bearing to frequency f1
Carry modulated signal (wireless receiving device 3B-1) and give the composition of the skew postponed.Alternatively, it is also possible to
Use to the wireless receiving device configured afterwards or afterwards by wireless power transmission device 2 detect wireless
The load modulation signal of current-collecting device gives the composition of the skew postponed.It addition, illustrate 2
Frequency, but it is not limited to this.Such as, even if the modulating frequency of load modulation signal is more than 3,
As above-mentioned situation, by giving different side-play amounts so that having in mutually different moment
Rising edge and drop edge, it is also possible to carry out and the communication of multiple wireless receiving devices.
In order to make the waveform of the 1st and the 2nd load modulation signal mutually different moment in each time slot
There is rising edge and drop edge, it is also possible to replace arbitrary to the 1st and the 2nd load modulation signal
The individual skew giving delay, and in the rising edge of the 1st load modulation signal and the moment of drop edge
Suppress the conversion (the 5th section of Figure 17) of the 2nd load modulation signal.
At multiple wireless receiving device 3B-1,3B-2 by load modulation signal and wireless power transmission device
During 2B communication, it is possible to use communicate through the 2nd load modulation signal of timesharing simultaneously.Multiple
Wireless receiving device 3B-1,3B-2 by the way of load modulation signal is with timesharing with wireless power transmission device
During 2B communication, control circuit 20B of wireless power transmission device 2B is to each wireless receiving device 3B-1,3B-2
Distribute different time slots.Control circuit 20B of wireless power transmission device 2B would indicate that the time slot of distribution
Control signal is sent to wireless receiving device 3B-1,3B-2.Wireless receiving device 3B-1,3B-2's
Control circuit controls transtation mission circuit, so that being divided by control circuit 20B of wireless power transmission device 2B
The time slot joined produces the 2nd load modulation signal.
In multiple wireless receiving devices, do not support the existing of tdm communication as described above even if existing
Wireless receiving device, it is also possible to do not use timesharing to be communicated by the 1st load modulation signal.
Figure 18 is to represent that the exemplary load used in the Wireless power transmission system of Figure 14 is adjusted
The sequential chart of the symbol of signal processed.Figure 18 represents the load modulation signal by wireless charging leagues dictate
Symbol.The frequency of clock signal is 2kHz.According to the Wireless power transmission system of the 2nd embodiment,
Even if filled with wireless power transmission by load modulation signal at multiple wireless receiving device 3B-1,3B-2 simultaneously
When putting 2B communication, it is also possible to inerrably transmit data.
Figure 20 is the frame of the composition of the Wireless power transmission system of the variation representing the 2nd embodiment
Figure.The wireless power transmission device of present embodiment can also be without possessing DC/DC converter circuit 21.Figure
The wireless power transmission device 2D of 20 has removing DC/DC from the wireless power transmission device 2B of Figure 14 and turns
Converter circuit 21, replaces control circuit 20B of Figure 14 and holds the composition of control circuit 20D.Control
The frequency of the RF power that circuit 20D processed control is produced by translation circuit 22 and size.Control circuit
20D is in order to control the amplitude (size) of RF power, it is also possible to control is produced by translation circuit 22
The phase place of RF power and at least one party of the dutycycle of translation circuit 22.
The Wireless power transmission system of the 2nd embodiment has the following advantages that.
By being determined rising edge and the wink of drop edge of load modulation signal by wireless power transmission device
Between, in the reception circuit of wireless power transmission device, it is possible to be controlled such that the 1st and the 2nd loads
Modulated signal will not be changed simultaneously.Thus, although with simple circuit, it is also possible to easy and practical
Ground demodulation load modulation signal, it is possible to reduce error rate during demodulation.
When preferential reduction error rate, it is also possible to be controlled such that arranging suppression in each time slot turns
The time interval that changes (but, communication speed reduces).
By improving the frequency of modulation the 2nd load modulation signal used in the communication of timesharing, it is possible to
The modulating speed of every time slot of the 2nd load modulation signal through timesharing is set to the 1st load modulation signal
Every time slot modulating speed more than.
It also is able to be used for improving communication speed by divided load modulation signal.In the case of Gai, wireless
Current-collecting device can also determine the rising edge of load modulation signal and the moment of drop edge.
It addition, control circuit 20B of the wireless power transmission device 2B of Figure 14 or the wireless power transmission of Figure 20
Control circuit 20D of device 2D processes by performing the power transmission control of Figure 11, sets by translation circuit
The frequency of 22 RF powers produced and size, so that the output electricity of each power receiving antenna 31-1,31-2
Force down in predetermined threshold value.
Now, control circuit 20B by control produced by translation circuit 22 RF power phase place,
The dutycycle of translation circuit 22 and the voltage of direct current power produced by DC/DC converter circuit 21
In at least 1, set RF power amplitude (size).That is, in order to control shaking of RF power
Width (size), it is possible to use DC/DC converter circuit 21 and this two side of converter circuit 22.
It addition, for the amplitude (size) controlling RF power, it is also possible to do not use DC/DC to change
Device circuit 21 and only use translation circuit 22.In the case of Gai, control circuit 20B of Figure 14 or figure
Control circuit 20D of 20 is by controlling the phase place of RF power, the conversion that are produced by translation circuit 22
In the dutycycle of circuit 22 at least 1, sets the amplitude (size) of RF power.
Amplitude (size) according to the RF power set by step S4 of Figure 11, it is possible to temporarily cease
Transmit above-mentioned RF power, or transmission is compared and detected that above-mentioned wireless receiving device is new with above-mentioned above-mentioned
The RF power that above-mentioned RF power during the coupling of power transmission antenna temporarily reduces.It addition, now, it is possible to
Reduce the output voltage of above-mentioned each wireless receiving device.
Embodiment disclosed herein is the most all to illustrate, and is not intended to limit.The disclosure
Scope is not to be determined by above explanation, but is determined by the scope of claim, it is intended that include comprising
Whole modes of the deformation in the implication being equal to the scope of claim and right.
It is subject to even if the Wireless power transmission system of each embodiment of the disclosure comprises more than 3 wireless
Electric installation can also carry out action equally.
Industrial applicability
The wireless power transmission device of the disclosure and Wireless power transmission system can be suitable for use with rechargeable battery
Electronic equipment, battery-operated motor cycle, electrically assisted bicycle or the charging system of electric automobile.It addition,
The wireless power transmission device of the disclosure and Wireless power transmission system can be applicable to AV equipment and white
The electric power system that the various equipment such as household electrical appliances is powered.Here, AV equipment such as comprises smart mobile phone, puts down
Plate computer terminal device, TV and laptop PC, white domestic appliances such as comprise washing machine,
Refrigerator and air conditioner.
Label declaration
1 ... continuous-current plant,
2,2A, 2B, 2C, 2D ... wireless power transmission device,
3-1,3-2 ... wireless receiving device,
20,20A, 20B, 20C, 20D ... control circuit,
20a ... memorizer,
21 ... DC/DC converter circuit,
22 ... translation circuit,
23 ... on-off circuit,
24-1～24-N, 24a-1,24b-1,24c-1,24A, 24C ... power transmission antenna,
25 ... position detection lines circle,
25a～24i ... detection coil,
26 ... position detecting circuit,
27 ... receive circuit,
28 ... transtation mission circuit,
31-1,31-2 ... power receiving antenna,
32-1,32-2,32B-1,32B-2 ... parasite power supplier,
33-1,33-2 ... load device,
34-1,34B-1 ... load modulation circuit,
35-1 ... rectification circuit,
36-1 ... monitoring circuit,
37-1,37B-1 ... control circuit,
38-1,38B-1 ... transtation mission circuit,
39-1 ... receive circuit,
C1, C2 ... capacitor,
Cm, Cm1, Cm2 ... electric capacity,
L1 ... power transmission coil,
SW, SW1, SW2 ... switch.
Claims (6)
1. a wireless power transmission device, is to transmit height to the multiple wireless receiving devices possessing power receiving antenna
Frequently the wireless power transmission device of the Wireless power transmission system of electric power, above-mentioned power receiving antenna comprises electricity reception coil,
Above-mentioned wireless power transmission device possesses:
At least one power transmission antenna, it is possible to the power receiving antenna electromagnetism coupling of above-mentioned multiple wireless receiving devices
Close；
One translation circuit, produces above-mentioned RF power and supplies at least one power transmission antenna above-mentioned；
Receive circuit, receive each above-mentioned from each wireless receiving device of above-mentioned multiple wireless receiving devices
The output voltage values of electricity reception coil；And
Control circuit, according to the above-mentioned output voltage values received, controls to include from above-mentioned translation circuit
The frequency of the above-mentioned RF power of supply or the transmission conditions of amplitude,
Above-mentioned control circuit,
The 1st wireless receiving device in above-mentioned multiple wireless receiving devices is being transmitted above-mentioned RF power
Time, the 2nd wireless receiving device in above-mentioned multiple wireless receiving device being detected new and above-mentioned at least
During one power transmission antenna electric magnetic coupling, change in above-mentioned multiple wireless receiving devices with above-mentioned at least one
The above-mentioned transmission conditions of individual power transmission antenna electric magnetic-coupled wireless receiving device transmission,
Using above-mentioned translation circuit, change is to magnetic-coupled wireless with at least one power transmission antenna electric above-mentioned
Either one of the frequency of RF power of current-collecting device transmission or amplitude, will from above-mentioned at least one give
The above-mentioned output voltage values that electricity magnetic-coupled at least one wireless receiving device above-mentioned of antenna electric receives, control
System is wrapped at least one wireless receiving device above-mentioned magnetic-coupled with at least one power transmission antenna electric above-mentioned
Below the restriction voltage of the component contained,
Above-mentioned control circuit,
Above-mentioned 2nd wireless receiving device in being judged as above-mentioned multiple wireless receiving device is new with above-mentioned
During at least one power transmission antenna electric magnetic coupling,
Use above-mentioned reception circuit, determine the frequency of above-mentioned RF power, the frequency of above-mentioned RF power
It is by from each output received with at least one magnetic-coupled wireless receiving device of power transmission antenna electric above-mentioned
The difference of magnitude of voltage control with above-mentioned restriction voltage and magnetic-coupled with at least one power transmission antenna electric above-mentioned
The frequency of the predetermined voltage amplitude that the differential pair of the minimum voltage of wireless receiving device work is answered,
Will in above-mentioned multiple wireless receiving devices magnetic-coupled with at least one power transmission antenna electric above-mentioned
Under the state of the frequency that the frequency of the RF power of wireless receiving device transmission is fixed on above-mentioned decision, become
The amplitude of more above-mentioned RF power, wireless will be subject to from magnetic-coupled with at least one power transmission antenna electric above-mentioned
Electric installation receive above-mentioned output voltage values control below above-mentioned restriction voltage and above-mentioned minimum voltage with
On.
Wireless power transmission device the most according to claim 1,
Above-mentioned control circuit, when above-mentioned 1st wireless receiving device is transmitted above-mentioned RF power, detects
During to above-mentioned 2nd wireless receiving device newly with at least one power transmission antenna electric magnetic coupling above-mentioned, in change
State transmission conditions, so that: stop transmitting above-mentioned RF power to above-mentioned 1st wireless receiving device,
Maybe by the RF power less than the above-mentioned RF power to above-mentioned 1st wireless receiving device transmission to above-mentioned
1st wireless receiving device transmission.
Wireless power transmission device the most according to claim 1 and 2,
Above-mentioned wireless power transmission device is also equipped with position detection lines circle and uses the detection of above-mentioned position detection lines circle
Above-mentioned power receiving antenna relative to the position detecting circuit of the relative position of above-mentioned power transmission antenna,
Detect above-mentioned 2nd wireless receiving device in above-mentioned multiple wireless receiving device new and above-mentioned at least
One magnetic-coupled method of power transmission antenna electric, is that above-mentioned position detecting circuit uses above-mentioned position detection lines
Circle detects in the above-mentioned power receiving antenna method relative to the relative position of above-mentioned power transmission antenna, or detection
State in multiple wireless receiving device with at least one magnetic-coupled wireless receiving device of power transmission antenna electric above-mentioned
The electricity reception coil of any one output voltage change method.
Wireless power transmission device the most according to claim 1,
Above-mentioned control circuit,
Use above-mentioned translation circuit, change in above-mentioned multiple wireless receiving devices with above-mentioned at least one
The frequency of RF power of power transmission antenna electric magnetic-coupled wireless receiving device transmission or amplitude arbitrary
Side, will be from above-mentioned at least one wireless receiving device magnetic-coupled with at least one power transmission antenna electric above-mentioned
The above-mentioned output voltage values received, controls magnetic-coupled above-mentioned with at least one power transmission antenna electric above-mentioned
Below the restriction voltage of the component that at least one wireless receiving device is comprised and above-mentioned wireless by electricity
More than the minimum voltage of device work.
Wireless power transmission device the most according to claim 1,
Above-mentioned wireless power transmission device is also equipped with storing device, and described storage device is stored in advance in above-mentioned
From above-mentioned the when 1st wireless receiving device and above-mentioned 2nd wireless receiving device transmit above-mentioned RF power
The output that each wireless receiving device of 1 wireless receiving device and above-mentioned 2nd wireless receiving device receives
The frequency characteristic of magnitude of voltage,
Above-mentioned control circuit,
Above-mentioned 2nd wireless receiving device in being judged as above-mentioned multiple wireless receiving device is new with above-mentioned
After at least one power transmission antenna electric magnetic coupling,
The frequency characteristic stored based on above-mentioned storage device, determine for above-mentioned 1st wireless by electricity
The frequency of the above-mentioned RF power of device and above-mentioned 2nd wireless receiving device transmission and amplitude.
6. a Wireless power transmission system, including:
Wireless power transmission device according to any one of Claims 1 to 5；With
Multiple wireless receiving devices, possess power receiving antenna respectively, above-mentioned power receiving antenna have comprise by electricity
The resonance circuit of coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610911801.2A CN106340976B (en) | 2013-10-29 | 2014-10-27 | Wireless power transmission device and Wireless power transmission system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-224574 | 2013-10-29 | ||
| JP2013224574 | 2013-10-29 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610911801.2A Division CN106340976B (en) | 2013-10-29 | 2014-10-27 | Wireless power transmission device and Wireless power transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104578448A CN104578448A (en) | 2015-04-29 |
| CN104578448B true CN104578448B (en) | 2017-01-04 |
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