CN105281444B - Wireless power transmission method, apparatus and system - Google Patents
Wireless power transmission method, apparatus and system Download PDFInfo
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- CN105281444B CN105281444B CN201510652034.3A CN201510652034A CN105281444B CN 105281444 B CN105281444 B CN 105281444B CN 201510652034 A CN201510652034 A CN 201510652034A CN 105281444 B CN105281444 B CN 105281444B
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- 230000005611 electricity Effects 0.000 claims description 22
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
Wireless power transmission method, apparatus and system.It is a kind of for opening up the wireless power transmission method for mending the wireless power transmission device of structure using full-bridge and half-bridge inverter, the described method comprises the following steps: detection can be transmitted wirelessly in the range of electric power with the presence or absence of wireless power receiver；It will test signal and be sent to the wireless power receiver；At least one of identification information and setting information are received from the wireless power receiver；Control error information packet is received from the wireless power receiver；By using the combination of the driving frequency of full-bridge or half-bridge inverter, duty ratio or power signal phase, the amount of power to be transmitted is controlled.
Description
It is July 9, entitled " radio in 2013 that the application, which is application No. is the 201310375830.8, applying date,
The divisional application of the application for a patent for invention of power transmission method, apparatus and system ".
Technical field
This specification is related to the wireless power transmission method, apparatus and system in wireless power transmission field.
Background technique
In recent years, wirelessly non-contactly the method that electric energy is supplied to wireless power receiver is had been used to substitute
The conventional method of electric energy is supplied in a wired fashion.The wireless power receiver for wirelessly receiving energy can be directly by institute
Received wireless power is charged to drive, or using received wireless power for battery, hereafter makes radio again
Power receiver is driven by charged power.
The wireless charging alliance (WPC) of management magnetic induction wireless power transmission technology has issued mark on April 22nd, 2010
Quasi- document " System description Wireless Power Transfer, Volume 1, Low Power, Part 1:
Interface Definition, Version 1.00Release Candidate 1 (RC1) ", for wireless power transmission
Interoperability.The standard document of WPC describes one kind and is connect by magnetic induction from a wireless power transmitter to a wireless power
The method for receiving device transmission electric power.
The electric power that version 1.00 is related to low-power 5W sends and receives.In the wireless power transmission specified in WPC at present
And the power transmission standard of 5W is defined more than not yet, it is contemplated that will execute what the mid power more than 5W sent and received
Specification.
Summary of the invention
Therefore, the one aspect of detailed description is to provide one kind and is used for mid power, can mutually grasp with low power receiver
Wireless power transmission method, wireless power transmission device and the wireless charging system of work.
The another aspect of detailed description is to provide in a kind of wireless power transmission method through the shape different from existing form
Formula sends and receives signal the standard for allowing the interoperable between mid power and low-power.
In order to achieve these and other advantages, according to the purpose of this manual, such as description embodied herein and extensive herein
, it provides a kind of for opening up the wireless power transmission side for mending the wireless power transmission device of structure using full-bridge and half-bridge inverter
Method the described method comprises the following steps: detection receives in the range of capable of wirelessly transmitting electric power with the presence or absence of wireless power
Device；It will test signal and be sent to the wireless power receiver；Identification information and setting are received from the wireless power receiver
At least one of information；Control error information packet is received from the wireless power receiver；It is inverse by using full-bridge or half-bridge
Become the combination of the driving frequency, duty ratio or power signal phase of device, controls the amount of power to be transmitted.
According to an illustrative embodiments, the first control margin of error is being received from mid power wireless power receiver
After packet, inverter can be opened up to benefit structure from half-bridge and change into full-bridge.
It, can be based on the knowledge collected from the wireless power receiver when receiving the first control error information packet
Version information in other data packet selects the amount of power to be transmitted.It can be converted in response to the conversion from half-bridge to full-bridge described
Driving frequency.
According to an illustrative embodiments, the electric power transfer unit of wireless power transmitter be can be used corresponding to half-bridge
Voltage as initial voltage.
The wireless power receiver that wireless power transmitter can be notified based on the wireless power receiver, described is
Low power receiver is also corresponded to corresponding to mid power receiver, is driven using one of full-bridge inverter and half-bridge inverter
Electric power transfer unit.
According to an illustrative embodiments, wireless power transmitter can be received from the wireless power receiver and be identified
Data packet, the identification data packet may include version information relevant to the wireless power receiver.
Wireless power transmitter initially can drive lc circuit using half-bridge inverter, and be based on the version information
Determine whether to open up inverter and mends structure from half-bridge change (or conversion) as full-bridge.When the version information corresponds to mid power
When, inverter can be opened up benefit structure and change into full-bridge from half-bridge by the wireless power transmitter, when the version information is corresponding
Half-bridge is kept when low-power.
According to an illustrative embodiments, the used drive of the step of there are the wireless power receivers is detected whether
Dynamic frequency can be 140kHz.
Detailed description also provides a kind of wirelessly from the wireless power for using full-bridge and half-bridge inverter to open up benefit structure
The method of transmitter reception electric power.The method may include following steps: sending detection letter to the wireless power transmitter
Number；At least one of identification information and setting information are sent to the wireless power transmitter；It is sent to the wireless power
Device sends control error information packet, and wherein version information is sent the wireless power transmitter by wireless power receiver, makes
The wireless power transmitter is obtained by using the driving frequency of full-bridge or half-bridge inverter, duty ratio or power signal phase
Combination controls the amount of power to be transmitted.
Detailed description also provides a kind of wireless power transmitter opened up using full-bridge and half-bridge inverter and mend structure, the nothing
Line power transmitter, which is configured that in the range of detection can wirelessly transmit electric power, whether there is wireless power receiver；It will
Detection signal is sent to the wireless power receiver；It is received in identification information and setting information from the wireless power receiver
At least one；Control error information packet is received from the wireless power receiver；By using full-bridge or half-bridge inverter
The combination of driving frequency, duty ratio or power signal phase controls the amount of power to be transmitted.
Detailed description also provides a kind of wireless charging system, and the wireless charging system includes: wireless power transmitter,
It is configured to that electric power is sent wirelessly；Wireless power receiver is configured to wirelessly send from the wireless power
Device receives electric power；Wherein the electric power transfer unit of the wireless power transmitter includes being configured to switch between full-bridge and half-bridge
Lc circuit；Wherein the wireless power receiver notifies described wireless power receiver itself to the wireless power transmitter
It corresponds to mid power receiver and also corresponds to low power receiver, so that the wireless power transmitter is determined using complete
Electric power transfer unit described in bridge or half-bridge driven.
The present disclosure proposes a kind of LC resonance driving method, for different capacity capacity wireless power transmitter and
Interoperable between wireless power receiver, can be with the application range of extended wireless electric power transmitters and receivers.In more detail
Ground, it is low power receiver or mid power receiver that transmitter, which can detecte receiver, and selects LC resonance drive mode.
This will lead to the interoperability of the different power receivers between wireless charger.
In addition, the present disclosure proposes a kind of " Wireless Power for ensuring with discussing in WPC
The 3.2.2 chapter electric power of Transfer Volume II:Medium Power Part 1:Interface Definition " is sent
The method that device designs the interoperability of MP-A2.In more detail, the present disclosure proposes one kind by controlling error (number in reception first
According to packet) change the driving method (mode) of bridge circuit later and allows mid power (~15W) to send system and receive system with 5W
The method for interoperability of uniting.
The applicable further range of the application will be become readily apparent from by detailed description shown below.However,
It should be understood that the detailed description of display disclosure preferred embodiment and particular instance are merely illustrative, because by this
A little to be described in detail, various modifications and change within the spirit and scope of the present invention will become bright for those skilled in the art
It is aobvious.
Detailed description of the invention
The attached drawing for being included provides further understanding for the disclosure, and is combined into and constitutes one of this specification
Point, example embodiment is shown, and illustrate the principle of the disclosure jointly together with the description.
In the accompanying drawings:
Fig. 1 is the wireless power transmitter and wireless power receiver for conceptually illustrating embodiment according to the present invention
Exemplary diagram；
Fig. 2A and 2B is to show in embodiment disclosed herein utilizable wireless power transmitter and wireless respectively
The example block diagram of the construction of power receiver；
Fig. 3 is to show wirelessly to be passed from wireless power transmitter to wireless power receiver according to inductively method
The view of the concept for power of transmitting electricity；
Fig. 4 A and 4B are the radio shown in embodiment disclosed herein in utilizable magnetic induction method
The block diagram of the part of power transmitter and wireless power receiver；
Fig. 5 is to show to be configured to have to be connect according to inductively method utilizable in embodiment disclosed herein
Receive the block diagram of the wireless power transmitter of one or more transmit coils of electric power；
Fig. 6 is shown according to resonance coupling process wirelessly from wireless power transmitter to wireless power receiver
Transmit the figure of the concept of electric power；
Fig. 7 A and 7B are the wireless powers shown in embodiment disclosed herein in utilizable resonance method
The block diagram of the part of transmitter and wireless power receiver；
Fig. 8 is to show to be configured to have to be connect according to resonance coupling process utilizable in embodiment disclosed herein
Receive the block diagram of the wireless power transmitter of one or more transmit coils of electric power；
Fig. 9 is shown to be conciliate when wireless way for transmitting electric power disclosed herein by the modulation of wireless power signal
Adjust the view that the concept of data packet is sent and received between wireless power transmitter and wireless power receiver；
Figure 10 is shown to send and receive Electric control message when wireless way for transmitting electric power disclosed herein
The view of construction；
Figure 11 is to show the view of signal form when executing modulation and demodulation in wireless power transmission disclosed herein
Figure；
Figure 12 is to show to be made in non-contact (wireless) power transmission method according to embodiment disclosed herein
The view of data packet including Electric control message；
Figure 13 is the wireless power transmitter and wireless power receiver shown according to embodiment disclosed herein
The view of working stage；
Figure 14, Figure 15 A, Figure 15 B ... to 18 be show including wireless power transmitter 100 and wireless power receiver it
Between Electric control message data packet structure view；
Figure 19 is to show the method that electric power is transferred at least one wireless power receiver from wireless power transmitter
Conceptual view；
Figure 20 is to show the conceptual view of WPC communication flow diagram；
Figure 21 is the view of the communication flow diagram in the method shown according to an illustrative embodiments；
Figure 22 is the structural map of the identification data packet of receiver；
Figure 23 is to show the flow chart of communication flow diagram presented herein；
Figure 24 and 25 is to show the exemplary conceptual view used of mid power；
Figure 26 and 27 is the construction view of the circuit using full-bridge and half-bridge respectively；
Figure 28 and 29 is the conceptual view of the modification of the circuit using full-bridge and half-bridge respectively；
Figure 30 is to show the flow chart of the communication flow diagram according to another exemplary embodiment；
Figure 31 and 32 is to show the exemplary concept view used of the mid power according to another exemplary embodiment
Figure；
Specific embodiment
Techniques disclosed herein can be applied to wireless power transmission (non-contact power transmission).But this place is public
The technology opened is without being limited thereto, can also be applied to all types of electrical power transmission systems that the technical spirit of technology can be applied to
With method, wireless charging circuit and method, and the method and apparatus using the electric power wirelessly transmitted.
It should be noted that technical term as used herein is used only for description particular implementation, rather than limit
The system present invention.In addition, unless otherwise specifically limited, otherwise technical term as used herein is construed as neck belonging to the present invention
The normally understood meaning of field technique personnel institute, and the excessively broad sense that should not be understood or excessively narrow sense.Moreover, if this place makes
Technical term is the wrong term for being unable to Correct spirit, then they should be replaced by those skilled in the art institute
The technical term of correct understanding.In addition, should based on general terms used in dictionary definition or context understanding invention, and
The excessively broad sense that should not be understood or excessively narrow sense.
In addition, otherwise odd number expression includes plural reference unless using expressly otherwise.In this application, term " packet
Containing " and " comprising " should not be construed must include all element or steps disclosed herein, and be construed as do not include
Some of which element or step, or be construed as further including other elements or step.
In addition, being intended merely for easily for the suffix " module " of component disclosed in following specification or " unit "
In description specification, suffix itself is not indicated in all senses or function.
Moreover, the term including the ordinal number such as first, second can be used for illustrating different elements, but element is not answered
It should be limited by these terms.Term is used only for the purpose for distinguishing an element and other elements.For example, first element
It can be named as second element, similarly, second element can be named as first element, without departing from right model of the invention
It encloses.
Hereinafter, it will the preferred embodiment that present invention will be described in detail with reference to the accompanying, such as regardless of the label in attached drawing
What, same or similar element is specified with same reference numerals, repeated explanation will be omitted.
Moreover, during illustrating the present invention, when the certain illustrated for well-known technique belonging to the present invention is judged as
Obscured it is of the invention when putting, will description is omitted.Further, it should be noted that attached drawing is used only for being easy to explain
Spirit of the invention is should not be understood as a result, to limit spirit of the invention by attached drawing.
Definition
Many-one communication: it is communicated between a transmitter (Tx) and multiple receivers (Rx)
One-way communication: transmitter only is sent from receiver by required information
Herein, transmitters and receivers are identical as transmission unit (equipment) and receiving unit (equipment) expression respectively.Under
Wen Zhong can be used together these terms.
The conceptual view of wireless power transmitter and wireless power receiver
Fig. 1 is the wireless power transmitter and wireless power receiver for conceptually illustrating embodiment according to the present invention
Schematic diagram.
Referring to Fig.1, wireless power transmitter 100 can be arranged to wirelessly transmit wireless power receiver 200
The power transmission device of required electric power.
In addition, wireless power transmitter 100 can be arranged to by transmitting electric power wirelessly come for wireless power
The wireless charging device that the battery of receiver 200 charges.Illustrate that wireless power transmitter 100 is nothing later with reference to Fig. 9
The case where line charge electric installation.
In addition, wireless power transmitter 100 can use it is various forms of under contactless state by power transmission to need
The device of the wireless power receiver 200 of electric power is wanted to realize.
Wireless power receiver 200 is to be operable as wirelessly receiving setting for electric power from wireless power transmitter 100
It is standby.Moreover, received wireless power can be used as battery charging in wireless power receiver 200.
On the other hand, the electronic equipment described herein for wirelessly receiving electric power should be broadly interpreted as
Including portable phone, cellular phone, smart phone, personal digital assistant (PDA), portable media player (PMP), put down
Plate computer, multimedia equipment etc. and Input/Output Device, such as keyboard, mouse, audio-visual aids etc..
As it is explained in detail hereinafter, wireless power receiver 200 can be mobile communication terminal (such as portable phone, honeycomb electricity
Words, tablet computer etc.) or multimedia equipment.
On the other hand, one or more wireless power sending methods can be used in wireless power transmitter 100, not with nothing
Line power receiver 200 wirelessly transmits electric power in the case where contacting with each other.In other words, wireless power transmitter 100
The inductively method of the magnetic induction phenomenon based on wireless power signal can be used and based on wireless power signal in specific frequency
At least one of magnetic resonance coupling process of EMR electromagnetic resonance phenomenon of rate transmits electric power.
Inductively the wireless power transmission in method is wirelessly to transmit electricity using primary coil and secondary coil
The technology of power is referred to using being passed by variation magnetic field caused by magnetic induction phenomenon from a coil to another coil-induced electric current
Transmission of electricity power.
Inductively the wireless power transmission in method refers to that wireless power receiver 200 is sent using from wireless power
The wireless power signal that device 100 is sent generates resonance, to send electric power from wireless power transmitter 100 by resonance phenomena
To the technology of wireless power receiver 200.
Hereinafter, it will the wireless power transmitter 100 and nothing according to embodiment disclosed herein is described in detail
Line power receiver 200.In the reference marker of the component distributed in each following attached drawings, identical reference marker will
For identical component, even if they are to show in different drawings.
Fig. 2A and 2B is to show utilizable wireless power transmitter 100 and radio in embodiment disclosed herein
The example block diagram of the construction of power receiver 200.
Wireless power transmitter
Referring to Fig. 2A, wireless power transmitter 100 may include power transmitting unit 110.Power transmitting unit 110 can be with
Control unit 112 is sent including power conversion unit 111 and electric power.
Power conversion unit 111 is wireless power signal by the electrical power conversion that will be provided from sending side power supply unit 190,
And it is transmitted to wireless power receiver 200.The wireless power signal that power conversion unit 111 is transmitted is with oscillating characteristic
Magnetic field or electromagnetic field form generate.For this purpose, power conversion unit 111 is configurable to include for generating wireless power letter
Number coil.
Power conversion unit 111 may include generating different type wireless power signal according to every kind of power transmission method
Constituent element.For example, power conversion unit 111 may include being used to form the primary coil for changing magnetic field, to wireless power
The secondary coil induced current of receiver 200.In addition, power conversion unit 111 may include being used to form with particular resonance
The coil (or antenna) in the magnetic field of frequency, to generate resonance frequency in wireless power receiver 200 according to resonance coupling process.
In addition, at least one in aforementioned inductively method and resonance coupling process can be used in power conversion unit 111
Kind transmission electric power.
In the constituent element that power conversion unit 111 is included, those will be described below referring to Figure 4 and 5 and be used to feel
The element of coupling process is answered, and those elements for being used for resonance coupling process will be described referring to Fig. 7 and 8.
On the other hand, power conversion unit 111 can also include forming frequency used in wireless power signal for controlling
The circuit of the characteristic of rate, the voltage applied, the electric current applied etc..
Electric power sends control unit 112 and controls the constituent element that power transmitting unit 110 is included.It is single that electric power sends control
Member 112 may be embodied as being integrated into another control unit (not shown) for controlling wireless power transmitter 100.
On the other hand, the region that wireless power signal can reach can be divided into two types.Firstly, movable
(active) region indicates the region for passing through the wireless power signal of power transmission to wireless power receiver 200.Next,
Semi-active region indicates that wireless power transmitter 100 is able to detect the existing area-of-interest of wireless power receiver 200.This
Place, electric power, which sends control unit 112, can detecte whether wireless power receiver 200 is located in zone of action or detection zone,
Or it is removed from the region.Specifically, electric power send control unit 112 can be used from power conversion unit 111 or individually
Whether the wireless power signal detection wireless power receiver 200 that the sensor being disposed therein is formed is located at zone of action or inspection
It surveys in region.For example, electric power sends the characteristic that control unit 112 can be used to form the electric power of wireless power signal by monitoring
Whether changed by wireless power signal, to detect the presence of wireless power receiver 200, which is present in inspection
The wireless power receiver 200 surveyed in region is influenced.But zone of action and detection zone can be according to wireless power transmissions
Method (such as inductively method, resonance coupling process etc.) and change.
Electric power, which sends control unit 112, can execute identification wireless power receiver 200 or according to detection wireless power
The existing result of receiver 200 determines whether to start the processing of wireless power transmission.
In addition, electric power, which sends control unit 112, can determine the power conversion unit 111 for being used to form wireless power signal
Frequency, at least one characteristic of voltage, electric current.The situation or wireless power of 100 side of wireless power transmitter can be passed through
The situation of 200 side of receiver determines to execute characteristic.
Electric power, which sends control unit 112, can receive Electric control message from wireless power receiver 200.Electric power sends control
Unit 112 processed can determine the frequency of power conversion unit 111, voltage, electric current based on received Electric control message
Furthermore at least one characteristic executes other control operations based on Electric control message.
For example, electric power, which sends control unit 112, can be used to form wireless power signal according to the determination of Electric control message
Frequency, at least one characteristic of voltage, electric current, which includes the rectification function in wireless power receiver 200
At least one of rate amount information, charging status information and identification information.
In addition, wireless power transmitter 100 can be based on electric power as using another control of Electric control message to operate
Control message executes typical control operation relevant to wireless power transmission.For example, wireless power transmitter 100 can receive and want
Information being exported by Electric control message from the sense of hearing or visually, relevant to wireless power receiver 200, or receive and set
Required information is authenticated between standby.
In the exemplary embodiment, electric power, which sends control unit 112, can receive electric power control by wireless power signal
Message processed.In another exemplary embodiment, electric power, which sends control unit 112, can pass through the side for receiving user data
Method receives Electric control message.
In order to receive aforementioned Electric control message, wireless power transmitter 100 can also include modulation/demodulation unit 113,
It is electrically connected to power conversion unit 111.Modulation/demodulation unit 113 can modulate modulates via wireless power receiver 200
The wireless power signal crossed, and Electric control message is received using it.
In addition, electric power sends control unit 112 can be filled by the communication included by utilizing in wireless power transmitter 100
It sets (not shown) and receives the user data including Electric control message, to obtain Electric control message.
[supporting with interior two-way communication]
Under the wireless power transmission environment according to the permission two-way communication of illustrative embodiments disclosed herein, electricity
Power, which sends control unit 112, can send data to wireless power receiver 200.It is sent transmitted by control unit 112 as electric power
Data can be sent, with request wireless power receiver 200 send Electric control message.
Wireless power receiver
Referring to Fig. 2 B, wireless power receiver 200 may include power supply unit 290.Power supply unit 290 provides wireless power
Electric power needed for the operation of receiver 200.Power supply unit 290 may include power reception unit 291 and power receiver control
Unit 292.
Power reception unit 291 receives the electric power wirelessly transmitted from wireless power transmitter 100.
Power reception unit 291 may include composition needed for receiving wireless power signal according to wireless power transmission method
Element.Moreover, power reception unit 291 can receive electric power according at least one wireless power transmission method, in such case
Under, power reception unit 291 may include constituent element needed for every kind of method.
Firstly, power reception unit 291 may include for receive with vibration characteristics magnetic field or electromagnetic field pattern
The coil of the wireless power signal of transmission.
For example, power reception unit 291 may include the faradic secondary coil in magnetic field by change, as root
According to the constituent element of inductively method.In the exemplary embodiment, power reception unit 291 may include coil and wherein
The resonance circuit that resonance phenomena is generated by the magnetic field with particular resonant frequency, as the composition member according to resonance coupling process
Part.
In another exemplary embodiment, when power reception unit 291 is according at least one wireless power transmission method
When receiving electric power, power reception unit 291 can be implemented as receiving electric power by using coil, or be embodied as by using root
Electric power is received according to the coil that every kind of power transmission method is form differently.
In the constituent element that power reception unit 291 is included, those will be described below referring to Fig. 4 A and 4B and be used for
The inductively element of method, and those elements for being used for resonance coupling process will be described referring to Fig. 7 A and 7B.
On the other hand, power reception unit 291 can also include rectifier and adjuster, convert wireless power signal to
Direct current.Moreover, power reception unit 291 can also include for protecting received electric power signal not generate over-voltage or mistake
The circuit of stream.
Power receiver control unit 292 can control each constituent element included in power supply unit 290.
Specifically, Electric control message can be transferred to wireless power transmitter 100 by power receiver control unit 292.
Electric control message can indicate the starting of wireless power transmitter 100 or terminate the transmission of wireless power signal.Moreover, electric power control
Message processed can indicate that wireless power transmitter 100 controls the characteristic of wireless power signal.
In the exemplary embodiment, power receiver control unit 292 can pass through wireless power signal and user data
At least one of transmission Electric control message.
In order to send aforementioned Electric control message, wireless power receiver 200 can also include being electrically connected to power receiver
The modulation/demodulation unit 293 of unit 291.The case where with wireless power transmitter 100, is similar, and modulation/demodulation unit 293 can be with
For sending Electric control message by wireless power signal.Power communication modulation/demodulation unit 293 may be used as control and flow through
The electric current of the power conversion unit 111 of wireless power transmitter 100 and/or the device of voltage.Hereinafter, it will illustrate a kind of use
In the power communication modulation/demodulation unit 113 or 293 for allowing 100 side of wireless power transmitter and 200 side of wireless power receiver
The method for being respectively used to send and receive Electric control message by wireless power signal.
The wireless power signal formed by power conversion unit 111 is received by power reception unit 291.At this point, electric power
The 293 modulation radio power of power communication modulation/demodulation unit of the control of reception control unit 292 200 side of wireless power receiver
Signal.For example, power receiver control unit 292 can execute modulation treatment, so that being connected to power reception unit by changing
The reactance of 291 power communication modulation/demodulation unit 293 and change from the received amount of power of wireless power signal institute.From wireless
Electric power signal the variation of received amount of power cause the electric current of the power conversion unit 111 for being used to form wireless power signal
And/or voltage change.At this point, the modulation/demodulation unit 113 of 100 side of wireless power transmitter can detecte electric current and/or voltage
Variation, thereby executing demodulation process.
In other words, power receiver control unit 292 can be generated including being intended to be transferred to wireless power transmitter 100
The data packet of Electric control message, and modulation radio force signal includes data packet to allow wherein, electric power sends control
Unit 112 can based on execute power communication modulation/demodulation unit 113 demodulation process result to decoded packet data, thus
It obtains comprising Electric control message in the packet.
In addition, power receiver control unit 292 can be by being filled using communication included in wireless power receiver 200
It sets (not shown) and sends the user data including Electric control message, send wireless power transmitter for Electric control message
200。
[supporting with interior two-way communication]
Under the wireless power transmission environment according to the permission two-way communication of illustrative embodiments disclosed herein, electricity
Power reception control unit 292 can receive data from wireless power transmitter 100.As transmitted by wireless power transmitter 100
Data can be sent, to request wireless power receiver 200 to send Electric control message.
In addition, power supply unit 290 can also include charger 298 and battery 299.
Receiving from power supply unit 290 can be by from wireless power for the wireless power receiver 200 of the electric power of operation
The electric power that transmitter 100 is transmitted is operated, or by using the electric power transmitted be battery 299 carry out charging and this
Be filled with electric power is received afterwards to be operated.At this point, power receiver control unit 292 can control charger 298 using being passed
Defeated electric power executes charging.
Hereinafter, description is suitable for the wireless power transmitter and radio of illustrative embodiments disclosed herein
Power receiver.Firstly, will describe to allow wireless power transmitter according to inductively method by power transmission referring to Fig. 3 to Fig. 5
To the method for electronic equipment.
Inductively method
Fig. 3 is shown according to inductively method wirelessly from wireless power transmitter to electronic equipment electric power
Concept view.
When with the electric power of inductively method transmission wireless power transmitter 100, if flowing through power transmitting unit 110
The current strength of interior primary coil changes, then passing through the magnetic field of primary coil will change due to electric current.The magnetic field of change
Induced electromotive force is generated at the secondary coil in wireless power receiver 200.
According to preceding method, the power conversion unit 111 of wireless power transmitter 100 may include the conduct in magnetic induction
Transmission (Tx) the coil 1111a of primary coil work.Moreover, the power reception unit 291 of wireless power receiver 200 can wrap
Include reception (Rx) the coil 2911a in magnetic induction as secondary coil work.
Firstly, wireless power transmitter 100 and wireless power receiver 200 are arranged in such a way: wireless power is sent
The receiving coil of 200 side transmit coil 1111a and wireless power receiver of 100 side of device is adjacent to each other in position.Then, such as
Fruit electric power sends the electric current change that control unit 112 controls transmit coil (Tx coil) 1111a, then power reception unit 291
Control uses and senses that the electromotive force of receiving coil (Rx coil) 2911a provides power to wireless power receiver 200.
Very little may be influenced by frequency characteristic by the efficiency that inductively method carries out wireless power transmission, still
It will receive the shadow of the wireless power transmitter 100 including each coil and the alignment between wireless power receiver 200 and distance
It rings.
On the other hand, in order to execute wireless power transmission in inductively method, wireless power transmitter 100 can be configured
It is the interface (interface surface, be not shown) for including plane form.One or more electronic equipments can be placed on boundary
The top in face, transmit coil 1111a may be mounted at the lower part at interface.In this case, in the hair for being mounted on interface lower part
Sending coil 1111a and be placed on interface top wireless power receiver 200 receiving coil 2911a between form it is small-scale
Perpendicular separation, thus the distance between coil becomes sufficiently small, to efficiently realize non-connect by inductively method
Touch power transmission.
Moreover, the instruction of alignment markers (not shown) is placed on the position of the wireless power receiver 200 on interface top.It is right
Capable of suitably the realizing of quasi- indicator instruction wireless power receiver 200 be mounted on the transmit coil 1111a of interface lower part with
The position of alignment between receiving coil 2911a.Alignment markers alternatively can be simple mark, or can be with guidance
The raised structures form of the position of wireless power receiver 200 is formed.In addition, alignment markers can be to be for example mounted on interface
The magnet form of the magnet of lower part is formed, and is suitably arranged from there through mutual magnetic force guidance coil to being mounted on wireless power and is connect
Receive the magnet with opposite polarity in device 200.
On the other hand, wireless power transmitter 100 can be formed as including one or more transmit coils.Wireless power hair
With sending 100 property of can choose of device using the receiving coil being suitable in one or more transmit coils with wireless power receiver 200
Some coils that 2911a is configured, to enhance electric power transmitting efficiency.It include one or more hairs below with reference to Fig. 5 description
The wireless power transmitter 100 of sending coil.
Hereinafter, it will the radio using the inductively method for being suitable for embodiment disclosed herein is described in detail
The configuration of power transmitter and electronic equipment.
The inductively wireless power transmitter and electronic equipment in method
Fig. 4 A and 4B are the radio shown in embodiment disclosed herein in utilizable magnetic induction method
The block diagram of the part of power transmitter 100 and wireless power receiver 200.It will be described referring to Fig. 4 A in wireless power transmitter 100
The construction for the power transmitting unit 110 for being included, and will be described referring to Fig. 4 B included in wireless power receiver 200
The construction of power supply unit 290.
Referring to Fig. 4 A, the power conversion unit 111 of wireless power transmitter 100 may include sending (Tx) coil 1111a
With inverter 1112.
Transmit coil 1111a can form the magnetic field for corresponding to wireless power signal according to curent change as described above.Hair
Sending coil 1111a can alternatively be embodied as planar spiral-type or cylindrical solenoid type.
The DC Input transformation obtained from power supply unit 190 is AC waveform by inverter 1112.What inverter 1112 was converted
The driving of AC electric current includes the resonance circuit of transmit coil 1111a and capacitor (not shown), forms magnetic in transmit coil 1111a
?.
In addition, power conversion unit 111 can also include positioning unit 1114.
Positioning unit 1114 can move or rotate transmit coil 1111a, so that enhancing use feeling answers the non-of coupling process
Contact the validity of power transmission.As described above, this is because including the wireless power transmitter of primary coil and secondary coil
Alignment and distance between 100 and wireless power receiver 200 can influence the power transmission that use feeling answers coupling process.Especially
It is, when positioning unit 1114 can be in the zone of action that wireless power receiver 200 is not present in wireless power transmitter 100
It uses.
Therefore, positioning unit 1114 may include driving unit (not shown), for moving transmit coil 1111a, so that
Center between the transmit coil 1111a of wireless power transmitter 100 and the receiving coil 2911a of wireless power receiver 200
It is located in preset range to centre distance, or rotation transmit coil 1111a, so that transmit coil 1111a and receiving coil
The center of 2911a overlaps each other.
For this purpose, wireless power transmitter 100 can also include the biography for being sensed by the position of wireless power receiver 200
The detection unit (not shown) that sensor is formed, electric power send control unit 112 and can be based on receiving from position-detection sensor
Wireless power receiver 200 location information control positioning unit 1114.
In addition, for this purpose, electric power send control unit 112 can by power communication modulation/demodulation unit 113 receive about
The control information of alignment or distance with wireless power receiver 200, and based on received about alignment or distance
It controls information and controls positioning unit 1114.
If power conversion unit 111 is configured to include multiple transmit coils, positioning unit 1114 can determine more
Which of a transmit coil will be used in electric power transmission.Illustrate below with reference to Fig. 5 include multiple transmit coils radio
The construction of power transmitter 100.
On the other hand, power conversion unit 111 can also include eletric power induction unit 1115.Wireless power transmitter 100
The monitoring of eletric power induction unit 1115 of side flows into the current or voltage of transmit coil 1111a.There is provided eletric power induction unit 1115 with
Check wireless power transmitter 100 whether normal operation, thus eletric power induction unit 1115 can detecte the electricity provided from outside
The voltage or electric current of power, and check whether voltage or electric current detected are more than threshold value.Although eletric power induction unit 1115 is not
It shows, but it may include the resistance of the voltage or electric current for detecting the electric power provided from outside, and for will be detected
Electric power voltage value or current value be compared with threshold value to export the comparator of comparison result.Based on eletric power induction unit
1115 inspection result, electric power transmission control unit 112 can control the cutting of switch unit (not shown) and be applied to transmit coil
The electric power of 1111a.
Referring to Fig. 4 B, the power supply unit 290 of wireless power receiver 200 may include receiving (Rx) coil 2911a and whole
Flow device 2913.
Electric current is sensed into receiving coil 2911a and the variation in the magnetic field formed in transmit coil 1111a.It receives
The implementation type of coil 2911a can be the planar spiral-type or cylindrical solenoid type similar with transmit coil 1111a.
In addition, series connection and capacitor in parallel are configurable to be connected to receiving coil 2911a, to enhance wireless power
Received validity executes Resonance detector.
Receiving coil 2911a can be the form of single coil or multiple coils.
Rectifier 2913 executes full-wave rectification to electric current, and exchange is converted to direct current.For example, rectifier 2913 may be implemented
For the full-bridge rectifier being made of four diodes or using the circuit of active block.
In addition, rectifier 2913 can also include adjuster, for being converted to more flat by the electric current of rectification and stablizing
Direct current.In addition, the output power of rectifier 2913 is supplied to each constituent element of power supply unit 290.In addition, rectifier
2913 can also include DC-DC converter, each to be adjusted to for the DC electric power of output to be converted to suitable voltage
Electric power needed for constituent element (for example, circuit of such as charging circuit 298).
Power communication modulation/demodulation unit 293 may be coupled to power reception unit 291, can be opposite configured with resistance
In the resistive element of direct current variation, and there can be capacity cell of the configuration reactance relative to exchange variation.Power receiver control
Unit 292 can change resistance or the reactance of power communication modulation/demodulation unit 293, to modulate 291 institute of power reception unit
The wireless power signal received.
On the other hand, power supply unit 290 can also include eletric power induction unit 2914.200 side of wireless power receiver
Eletric power induction unit 2914 monitors the voltage and or current of the electric power rectified by rectifier 2913, if the electricity of the electric power of rectification
Pressure and/or controller are as testing result, then power receiver control unit 292 sends Electric control message to wirelessly
Power transmitter 100 is to transmit suitable electric power.
Be configured to include one or more transmit coils wireless power transmitter
Fig. 5 is to show to be configured to have to be connect according to inductively method utilizable in embodiment disclosed herein
Receive the block diagram of the wireless power transmitter of one or more transmit coils of electric power.
It, can according to the power conversion unit 111 of the wireless power transmitter 100 of embodiment disclosed herein referring to Fig. 5
To include one or more transmit coil 1111a-1 to 1111a-n.One or more transmit coil 1111a-1 to 1111a-n can
To be the array of partly overlapping primary coil.By some in one or more transmit coils, zone of action can be determined.
One or more transmit coil 1111a-1 to 1111a-n may be mounted at the lower part at interface.In addition, electrical power conversion
Unit 111 can also include some companies for establishing and discharging one or more transmit coil 1111a-1 into 1111a-n
The multiplexer 1113 connect.
When detecting that wireless power receiver 200 is placed on the position on interface top, electric power sends control unit 112 can be with
The position of wireless power receiver 200 detected is considered to control multiplexer 1113, to allow one or more transmission lines
Circle 1111a-1 can be placed in inductively relationship with the receiving coil 2911a of wireless power receiver 200 into 1111a-n
Coil be connected to each other.
For this purpose, electric power sends the location information of the available wireless power receiver 200 of control unit 112.For example, electric power
Sending control unit 112 can be obtained wirelessly by the position detection unit (not shown) being arranged in wireless power transmitter 100
Position of the power receiver 200 on interface.For another example, electric power sends control unit 112 can be alternatively from interface
On object receive instruction wireless power signal intensity Electric control message, or receive instruction respectively using one or more
The Electric control message of the identification information of the object of transmit coil 1111a-1 to 1111a-n, based on received result determine it with
Which of one or more transmit coils are located adjacent to, to obtain the location information of wireless power receiver 200.
On the other hand, the zone of action as interface a part can be indicated when wireless power transmitter 100 is with wireless parties
When formula is by power transmission to wireless power receiver 200, a part that high efficiency magnetic field can pass through.At this point, being formed across work
The single transmit coil in magnetic field in dynamic region or one in multiple transmit coils or combination can specify as master unit.Cause
This, electric power, which sends control unit 112, can determine zone of action based on the position of wireless power receiver 200 detected, and
And the connection for corresponding to the master unit of zone of action is established, to control multiplexer 1113, thus allow wireless power receiver 200
Receiving coil 2911a and belong to the coil of master unit and be placed in inductively relationship.
In addition, power conversion unit 111 can also include the impedance matching unit (not shown) for controlling impedance, with
Its coil connected forms resonance circuit.
Hereinafter, it will be used to that wireless power transmitter be allowed to transmit electricity according to resonance coupling process referring to the disclosure of Fig. 6 to 8
The method of power.
Resonance coupling process
Fig. 6 be show according to resonance coupling process wirelessly from wireless power transmitter to electronic equipment electricity
The view of the concept of power.
Firstly, will be briefly described resonance below.Resonance refers to periodically to receive to be had with the natural frequency of vibrational system
When having the external force of identical frequency, the phenomenon that Oscillation Amplitude dramatically increases.Resonance is in all types of vibrations (such as mechanical vibration
Dynamic, electric oscillation etc.) in there is a phenomenon where.In general, when from outside to vibrational system apply vibration force when, if its natural frequency with
The frequency of external exerted forces is identical, then vibrates change by force, thereby increase width.
It is multiple when the multiple vibrating bodies being separated from each other in preset distance are vibrated with identical frequency using identical principle
Resonance occurs each other for vibrating body, in this case, causes the reduced resistance between multiple vibrating bodies.It in circuit, can be with
Resonance circuit is made by using inductor and capacitor.
When wireless power transmitter 100 transmits electric power according to inductively method, by the friendship in power transmitting unit 110
Galvanic electricity power forms the magnetic field with certain vibration frequency.If sent out in wireless power receiver 200 due to being formed by magnetic field
Raw resonance phenomena, then generate electric power by the resonance phenomena in wireless power receiver 200.
Resonance frequency can be determined by the formula in following equatioies 1.
[equation 1]
Herein, resonance frequency (f) is determined by inductance (L) in circuit and capacitor (C).Magnetic field is being formed using coil
In circuit, inductance can be determined by the number of turns of coil etc., capacitor can be determined by gap, the area etc. between coil.It removes
Coil, can configure capacitor resonant circuit to be connected to it, to determine resonance frequency.
Referring to Fig. 6, when electric power is sent wirelessly according to resonance coupling process, the electricity of wireless power transmitter 100
Power converting unit 111 may include wherein forming transmission (Tx) the coil 1111b in magnetic field, and be connected to transmit coil
1111b is to determine the resonance circuit 1116 of certain vibration frequency.Resonance electricity can be realized by using condenser network (capacitor)
Road 1116 can determine certain vibration frequency based on the inductance of transmit coil 1111b and the capacitor of resonance circuit 1116.
The circuit element construction of resonance circuit 1116 may be realized in various forms so that power conversion unit 111 forms magnetic
, it is not limited to the form illustrated in fig. 6 for being parallel-connected to transmit coil 1111b.
In addition, the power reception unit 291 of wireless power receiver 200 may include resonance circuit 2912 and receive (Rx)
Coil 2911b generates resonance phenomena by the magnetic field formed in wireless power transmitter 100.In other words, it can also use
Condenser network realizes that resonance circuit 2912, resonance circuit 2912 are configured so that inductance and resonance based on receiving coil 2911b
The resonance frequency that the capacitor of circuit 2912 determines has frequency identical with the resonance frequency in formed magnetic field.
The construction of the circuit element of resonance circuit 2912 can be realized in different forms, so that power reception unit 291 is logical
It crosses magnetic field and generates resonance, be not limited to the form illustrated in fig. 6 for being connected in series to receiving coil 2911b.
Certain vibration frequency in wireless power transmitter 100 can have LTX、CTX, and can be by using equation 1
It obtains.Herein, when by the L of wireless power receiver 200RXAnd CRXThe result substituted into equation 1 is identical as particular resonant frequency
When, wireless power receiver 200 generates resonance.
According to the non-contact power transmission method coupled by resonance, when wireless power transmitter 100 and wireless power connect
Device 200 is received respectively in identical frequency resonance, electromagnetic wave is propagated by short distance magnetic field, so if they have different frequencies
Energy transmission is then not present in rate between devices.
As a result, greatly being influenced by frequency characteristic by the efficiency of the non-contact power transmission of resonance coupling process, and wrap
The influence of alignment and distance between wireless power transmitter 100 and wireless power receiver 200 containing each coil is relatively small
In inductively method.
Hereinafter, it will be explained in the wireless power suitable for the resonance coupling process of embodiment disclosed herein
The construction of transmitter and electronic equipment.
Wireless power transmitter in resonance coupling process
Fig. 7 A and 7B are the wireless powers shown in embodiment disclosed herein in utilizable resonance method
The block diagram of the part of transmitter 100 and wireless power receiver 200.
The construction of power transmitting unit 110 included in wireless power transmitter 100 will be described referring to Fig. 7 A.
The power conversion unit 111 of wireless power transmitter 100 may include sending (Tx) coil 1111b, inverter
1112 and resonance circuit 1116.Inverter 1112 is configurable to be connected to transmit coil 1111b and resonance circuit 1116.
Transmit coil 1111b can be separately installed with according to the transmit coil 1111a of inductively method transmission electric power,
But a single coil can be used and transmit electric power in inductively method and resonance coupling process.
As described above, transmit coil 1111b forms the magnetic field for being used for transmission electric power.When being applied AC power, send
Coil 1111b and resonance circuit 1116 generate resonance, at this point it is possible to inductance and resonance circuit based on transmit coil 1111b
1116 capacitor determines vibration frequency.
For this purpose, the DC Input transformation obtained from power supply unit 190 is AC waveform, the AC electric current converted by inverter 1112
It is applied to transmit coil 1111b and resonance circuit 1116.
In addition, power conversion unit 111 can also include frequency adjustment unit 1117, for changing power conversion unit
111 resonance frequency.According to formula 1, based on the inductance and/or the determining electricity of capacitor in the circuit of composition power conversion unit 111
The resonance frequency of power converting unit 111, thus electric power sends control unit 112 and can be changed by controlling frequency adjustment unit 1117
Power transformation sense and/or capacitor determine the resonance frequency of power conversion unit 111.
For example, frequency adjustment unit 1117 is configurable to include for adjusting the capacitor for including in resonance circuit 1116
The distance between to change the motor of capacitor, or include the number of turns or diameter for adjusting transmit coil 111b to change inductance
Motor, or include the active component for determining capacitor and/or inductance.
On the other hand, power conversion unit 111 can also include eletric power induction unit 1115.Eletric power induction unit 1115
Operation is as hereinbefore.
Referring to Fig. 7 B, the construction of power supply unit 290 included in wireless power receiver 200 will be described.As described above,
Power supply unit 290 may include receiving (Rx) coil 2911b and resonance circuit 2912.
In addition, the power reception unit 291 of power supply unit 290 can also include rectifier 2913, being used for will be due to humorous
The AC electric current that vibration phenomenon generates is converted to DC.Rectifier 2913 can similarly be configured with aforementioned.
In addition, power reception unit 291 can also include eletric power induction unit 2914, it is used to monitor rectified electric power
Voltage and or current.Eletric power induction unit 2914 can similarly be configured with aforementioned.
Be configured to include one or more transmit coils wireless power transmitter
Fig. 8 is to show to be configured to have to be connect according to resonance coupling process utilizable in embodiment disclosed herein
Receive the block diagram of the wireless power transmitter of one or more transmit coils of electric power.
It, can according to the power conversion unit 111 of the wireless power transmitter 100 of embodiment disclosed herein referring to Fig. 8
To include one or more transmit coil 1111b-1 to 1111b-n and be connected to the resonance circuit (1116-1 of each transmit coil
To 1116-n).Moreover, power conversion unit 111 can also include for establishing and discharging one or more transmit coils
The multiplexer 1113 of some connections of the 1111b-1 into 1111b-n.
One or more transmit coil 1111b-1 to 1111b-n are configurable to vibration frequency having the same, Huo Zheqi
In some vibration frequencies for being configurable to have different.By being connected respectively to one or more transmit coil 1111b-1 extremely
(inductance and/or capacitor of 1116-1 to 1116-n) determines vibration frequency to the resonance circuit of 1111b-n.
For this purpose, frequency adjustment unit 1117, which is configurable to change, is connected respectively to one or more transmit coil 1111b-
1 to the 1111b-n resonance circuit (inductance and/or capacitor of 1116-1 to 1116-n).
In-band communications
Fig. 9 is shown to be conciliate when wireless way for transmitting electric power disclosed herein by the modulation of wireless power signal
Adjust the view that the concept of data packet is sent and received between wireless power transmitter and wireless power receiver.
As shown in figure 9, wireless power letter can be generated in the power conversion unit 111 that wireless power transmitter 100 is included
Number.Wireless power signal can be generated by the transmit coil 1111 that power conversion unit 111 is included.
The wireless power signal 10a generated by power conversion unit 111 can reach wireless power receiver 200, thus
It is received by the power reception unit 291 of wireless power receiver 200.Wireless power signal generated can be connect by electric power
The receiving coil 2911 that unit 291 is included is received to receive.
Power receiver control unit 292, which can control, to be connected to the modulation/demodulation unit 293 of power reception unit 291 and exists
Modulation radio force signal when wireless power receiver 200 receives wireless power signal.When received wireless power signal
When being modulated, wireless power signal can form closed circuit in magnetic field or electromagnetic field.This can permit wireless power transmission
The wireless power signal 10b of the induction modulation of device 100.Modulation/demodulation unit 113 can demodulate incuded wireless power signal,
And the decoding data packet from the wireless power signal demodulated.
The modulator approach utilized when communicating between wireless power transmitter 100 and wireless power receiver 200 can be
Amplitude modulation.It has been observed that amplitude modulation is backscattered modulation, the electric power that can be wherein 200 side of wireless power receiver is logical
Letter modulation/demodulation unit 293 changes the amplitude of the wireless power signal 10a formed by power conversion unit 111, wireless power is sent out
The backscattered modulation for sending the power receiver control unit 292 of 100 side of device to detect the amplitude of modulated wireless power signal 10b
Method.
The modulation and demodulation of wireless power signal
Hereinafter, it 0 and 11 will be given between wireless power transmitter 100 and wireless power receiver 200 referring to Fig.1
The explanation of the modulation and demodulation of the data packet sent or received.
Figure 10 is shown to send or receive Electric control message when wireless way for transmitting electric power disclosed herein
The view of construction, Figure 11 are the signal forms shown when executing modulation and demodulation in wireless power transmission disclosed herein
View.
Referring to Fig.1 0, as shown in (a) of Figure 11, received by the power reception unit 291 of wireless power receiver 200
To wireless power signal can be non-modulation wireless power signal 51.Wireless power receiver 200 and wireless power transmitter
100 can establish resonance coupling, Ke Yitong according to the resonance frequency set by the resonance circuit 2912 in power reception unit 291
It crosses receiving coil 2911b and receives wireless power signal 51.
Power receiver control unit 292 can be by changing the load impedance in modulation/demodulation unit 293, and modulation passes through
The received wireless power signal 51 of power reception unit 291.Modulation/demodulation unit 293 may include for modulation radio power
The passive element 2931 and active component 2932 of signal 51.Modulation/demodulation unit 293 can be made with modulation radio force signal 51
It includes the data packet that expectation is sent to wireless power transmitter 100.Herein, data packet can be input to modulating/demodulating list
Active component 2932 in member 293.
Hereafter, the electric power of wireless power transmitter 100 sends control unit 112 and can be modulated by envelope detection
Wireless power signal 52, and signal 53 detected is decoded as numerical data 54.Demodulation, which can detecte, flows into electric power turn
Change unit 111, be divided into the current or voltage in two states (HI stage and LO stage), and based on the number classified according to state
Digital data obtains the data packet sent by wireless power receiver 200.
Hereinafter, will illustrate allows wireless power transmitter 100 to obtain from the numerical data of demodulation is connect by wireless power
Receive the process for the Electric control message that device 200 is sent.
1 (b) referring to Fig.1, electric power send control unit 112 and use clock signal from the signal detection of envelope detection
(CLK) coded-bit.Coded-bit detected is according to used in the modulated process of 200 side of wireless power receiver
Bits Coding Method coding.Bits Coding Method can correspond to any one of non-return-to-reference (NRZ) and coded biphase.
For example, bit detected can be differentially bi phase (DBP) coded-bit.It is encoded according to DBP, allows wireless power
There are the power receiver control unit 292 of 200 side of receiver two states to change with encoded data bits 1, and have one kind
State changes with encoded data bits 0.In other words, can with the rising edge of clock signal and failing edge generate HI state and
The mode encoded data bits 1 of transformation between LO state, can be to generate HI state and LO shape in the rising edge of clock signal
The mode encoded data bits 0 of transformation between state.
On the other hand, electric power, which sends control unit 112, can use group from the Bit String detected according to Bits Coding Method
The data of byte unit are obtained at the byte format of data packet.For example, can be by using 11 bit shown in (c) such as Figure 12
Asynchronous serial format transmits Bit String detected.In other words, bit detected may include for indicating byte and starting
The termination bit that beginning bit and expression byte terminate can also include positioned at initial bits and terminating the data bit between bit
(b0 to b7).Moreover, it is also possible to include the Parity Check Bits for checking data error.The data of byte unit constitute packet
The data packet of the message containing Electric control.
[supporting with interior two-way communication]
As previously mentioned, Fig. 9, which shows wireless power receiver 200, uses the carrier wave formed by wireless power transmitter 100
Signal 10a sends data packet.But wireless power transmitter 100 also can be used similar approach and transmit data to radio
Power receiver 200.
That is, electric power transmission control unit 112, which can control the modulation of modulation/demodulation unit 113, will be sent to wirelessly
The data of power receiver 200, so that data may be embodied in carrier signal 10a.Herein, wireless power receiver 200
Power receiver control unit 292 can control modulation/demodulation unit 293 and execute demodulation, thus from the carrier signal 10a modulated
Middle acquisition data.
Data packet format
Hereinafter, the communication using wireless power signal according to illustrative embodiments disclosed herein will be provided
Used in data packet structure explanation.
Figure 12 is to show to be made in non-contact (wireless) power transmission method according to embodiment disclosed herein
The view of data packet including Electric control message.
As shown in (a) in Figure 12, wireless power transmitter 100 and wireless power receiver 200 can be sent and received
It is expected that with the data for ordering the form of packet (command_packet) 510 to send.Order packet 510 may include header 511 and disappear
Breath 512.
Header 511 may include the field that instruction includes the type of data in message 512.It can be based on designation date
The size and type of the value decision message of the field of type.
Header 511 may include the address field for identifying the transmitter (initiator) of data packet.For example, address field can be with
Indicate the identifier or the affiliated identifier organized of wireless power receiver 200 of wireless power receiver 200.When wireless power receives
When device 200 sends data packet 510, data packet 510 is can be generated in wireless power receiver 200, and address field is indicated
To the relevant identification information of receiver 200 itself.
Message 512 may include that the initiator of data packet 510 it is expected the data sent.It include the data in message 512
It can be report, request or the response for another party.
According to an illustrative embodiments, the configuration order packet 510 as shown in (b) of Figure 12.It is wrapped included in order
Header 511 in 510 can be indicated with predefined size.For example, header 511 can have 2 byte-sizeds.
Header 511 may include destination address field.For example, destination address field can have 6 bit sizes.
Header 511 may include operational order field (OCF) or operation group field (OGF).OGF is for for radio
Every group command specified value of power receiver 200, OCF are in the presence of each group including wireless power receiver 200
Each order specified value.
Message 512 can be divided into the length field 5121 of parameter and the value field 5122 of parameter.That is, the hair of data packet 510
Playing side can use the Length Value of at least one parameter required for the data for indicating expectation transmission to (5121a-5122a etc.)
Generate message.
2 (c) referring to Fig.1, wireless power transmitter 100 and wireless power receiver 200 can with to order packet 510 into
One step, which is added leading 520 and verified, sends and receives data with the form of 530 data packet.
Leading 520 can be used for it is synchronous with the 100 received data execution of wireless power transmitter, and detection header
520 initial bits.Leading 520 are configurable to repeat identical bit.For example, leading 520 may be configured such that basis
The data bit 1 of DBP coding repeats 11 to 25 times.
Verification and 530 can be used for detecting the error that may occur in order packet 510 when sending Electric control message.
Working stage
Hereinafter, the explanation of the working stage of wireless power transmitter 100 and wireless power receiver 200 will be provided.
Figure 13 shows the wireless power transmitter 100 and wireless power receiver according to embodiment disclosed herein
200 working stage.In addition, Figure 14 to 18 shows the packet between wireless power transmitter 100 and wireless power receiver 200
Include the structure of the data packet of Electric control message.
Referring to Fig.1 3, for the wireless power transmitter 100 of wireless power transmission and the work of wireless power receiver 200
Stage can be divided into choice phase (state) 610, ping stage 620, identification and configuration phase 630, power transmission stage 640.
In selection state 610, the detection of wireless power transmitter 100 can be wirelessly in wireless power transmitter 100
Sending whether there is object in the range of electric power, and in ping state 620, wireless power transmitter 100 is to detected object
Detection signal is sent, wireless power receiver 200 sends the response to detection signal.
In addition, in identification and configuration status 630, the selected nothing of state before wireless power transmitter 100 is identified by
Line power receiver 200, and obtain the configuration information sent for electric power.In power transmission state 640, wireless power transmitter
100 send electric power to wireless power receiver 200, while in response to from the received control information control of wireless power receiver 200
Electric power processed is sent.
Hereinafter, it will be explained in each working stage.
(1) state is selected
In selection state 610, wireless power transmitter 100 executes detection processing, and selection is present in detection zone
Wireless power receiver 200.As described above, detection zone refers to that the object in relevant range can influence power conversion unit
The region of 111 electricity characteristic.Compared with ping state 620, for selecting wireless power receiver in selection state 610
200 detection processing is the wireless power signal that detection is used to form in the power conversion unit of 100 side of wireless power transmitter
Quantity of power variation, to check whether there is the processing that any object is present in preset range, rather than use electric power control
Message processed receives the scheme of response from wireless power receiver 200.It is used using wireless power signal test object
In terms of the data packet for the number format in ping state 620 being described below, the detection processing in selection state 610 can claim
For simulation ping processing.
Wireless power transmitter 100 in selection state 610 can detecte object into or out of detection zone.In addition,
Wireless power transmitter 100 will can wirelessly transmit the wireless power receiver 200 of electric power and be located at detection zone
Other objects (such as key, coin etc.) in object in domain are mutually distinguished.
As described above, the distance that can wirelessly transmit electric power can be according to inductively method and resonance coupling side
Method and it is different, the detection zone for being consequently for the test object in selection state 610 can also be different from each other.
Firstly, the wireless power in selection state 610 is sent according to inductively method transmission electric power
Device 100 can monitoring interface (not shown), with the alignment and removal of test object.
In addition, wireless power transmitter 100 is able to detect the position for being placed on the wireless power receiver 200 on interface top
It sets.As described above, being formed as includes that the wireless power transmitters 100 of one or more transmit coils can execute following processing:
Enter ping state 620 in selection state 610, is checked whether using each coil from object and sent in ping state 620
For detecting the response of signal, or subsequently enters identification state 630 and have sent identification information to check whether from object.Nothing
Line power transmitter 100 can be used for based on the determination of the detection position of the wireless power receiver 200 obtained by aforementioned process
The coil of non-contact power transmission.
In addition, when transmitting electric power according to resonance coupling process, in selection state 610,100 energy of wireless power transmitter
Any of enough frequency, electric current and voltage by detecting power conversion unit is sent out due to the object being located in detection zone
It is raw to change, carry out test object.
On the other hand, in selection state 610, wireless power transmitter 100 can by using inductively method and
At least any one detection method of resonance coupling process carrys out test object.Wireless power transmitter 100 can be according to every kind of electricity
Power sending method executes object detection processing, and test object is then selected from the coupling process for non-contact power transmission
Method is to proceed to other states 620,630 and 640.
On the other hand, for wireless power transmitter 100, be formed as the radio of the test object in selection state 610
Force signal and the nothing for being formed as executing Digital Detecting, identification, configuration and electric power transmission in subsequent state 620,630 and 640
Line electric power signal frequency, in terms of can have different characteristics.This is because the selection shape of wireless power transmitter 100
State 610 corresponds to the idle state for test object, so that wireless power transmitter 100 be allowed to reduce disappearing in idle state
Power consumption power, or generate the special signal for object to be effectively detected.
(2) ping state
In ping state 620, wireless power transmitter 100 executes detection by Electric control message and is present in detection zone
The processing of wireless power receiver 200 in domain.Use the Characteristics Detections such as wireless power signal wireless in selection state 610
The processing of power receiver 200 is compared, and the detection processing in ping state 620 is properly termed as digital ping processing.
In ping state 620, wireless power transmitter 100 forms the wireless power of detection wireless power receiver 200
Signal modulates the wireless power signal modulated by wireless power receiver 200, and from the wireless power signal modulated
It obtains and the Electric control message to the corresponding digital data format of the detection response of signal.Wireless power transmitter 100 can be with
It receives with to the corresponding Electric control message of the detection response of signal, the wireless power that target is sent to identify as electric power receives
Device 200.
Be formed as allowing the wireless power transmitter 100 in ping state 620 to execute the detection signal that Digital Detecting is handled
It can be by applying the electric power signal of particular job point to be formed by wireless power signal within a predetermined period of time.It operating point can
To indicate to be applied to frequency, duty ratio and the amplitude of the voltage of transmission (Tx) coil.Wireless power transmitter 100 can be generated logical
The electric power signal detection signal generated for applying particular job point within a predetermined period of time is crossed, and attempts to connect from wireless power
It receives device 200 and receives Electric control message.
On the other hand, it can be expression wireless power receiver with to the corresponding Electric control message of the detection response of signal
200 the intensity of received wireless power signal message.For example, as shown in figure 14, wireless power receiver 200 can be sent
Signal strength data packet 5100, it includes the message for the receiving intensity for indicating wireless power signal, as the sound to detection signal
It answers.Data packet 5100 may include header 5120, be used for the data packet and message 5130 for notifying to indicate signal strength,
Indicate by wireless power receiver 200 received electric power signal intensity.Electric power signal intensity in message 5130 can be
Indicate between wireless power transmitter 100 and wireless power receiver 200 electric power send inductively or resonance coupling
The value of the degree of conjunction.
Wireless power transmitter 100 can receive the response message for detecting signal to find wireless power receiver
200, then expanding digital detection processing, is identified and configuration status 630 with entering.In other words, wireless power transmitter 100 is protected
The electric power signal for holding particular job point is subsequently found wireless power receiver 200, to receive institute in identification and configuration status 630
The Electric control message needed.
But if wireless power transmitter 100 cannot find that the wireless power receiver 200 of electric power can be transmitted,
The working stage of wireless power transmitter 100 will return to selection state 610.
(3) identification and configuration status
In identification and configuration status 630, wireless power transmitter 100 can receive wireless power receiver 200 and be sent out
The identification information and/or configuration information sent, thus control efficiently performs electric power transmission.
In identification and configuration status 630, wireless power receiver 200 can send the identification information including their own
Electric control message.For this purpose, as shown in fig. 15, wireless power receiver 200 can for example send identification data packet 5200,
Message comprising indicating the identification information of wireless power receiver 200.Data packet 5200 may include header 5220, for notifying
Indicate the data packet and message 5230 of identification information, it includes the identification informations of electronic equipment.Message 5230 may include table
Show the information (2531 and 5232) of the version of the contract for non-contact power transmission, for identification wireless power receiver 200
Manufacturer information 5233, indicate presence or absence of expansion equipment identifier information 5234, basic equipment identifier
5235.In addition, if being shown in indicates that there are expansion equipment marks in the information 5234 presence or absence of expansion equipment identifier
Know symbol, then will send the extension comprising expansion equipment identifier as shown in fig. 15b with independent mode and identify data packet 5300.Number
According to the header 5320 that packet 5300 may include for notifying to indicate the data packet of expansion equipment identifier, and include expansion equipment
The message 5330 of identifier.When using expansion equipment identifier as described above, identification information 5233 based on manufacturer,
The information of basic equipment identifier 5235 and expansion equipment identifier 5330 will wireless power receiver 200 for identification.
In identification and configuration status 630, wireless power receiver 200 can be sent comprising about greatest hope power
The Electric control message of information.For this purpose, wireless power receiver 200 can for example send configuration data packet as shown in figure 16
5400.Data packet may include for notifying that it is the header 5420 of configuration data packet and comprising the letter about greatest hope power
The message 5430 of breath.Message 5430 may include power grade 5431, the information 5432 about greatest hope power, instruction determination
The quantity of the indicator 5433 of the method for the electric current of the main battery of wireless power sender side and optional configuration data packet
5434.Indicator 5433 can indicate whether the electric current of the main battery of wireless power sender side is determined as wireless power
The contract defined of transmission.
On the other hand, wireless power transmitter 100 can be generated based on identification information and/or configuration information for it is wireless
The power transmission contract of the power charge of power receiver 200.Power transmission contract may include in power transmission state 640
Determine the limitation of the parameter of power transmission characteristics.
Wireless power transmitter 100 can terminate identification and configuration status 630 before entering power transmission state 640,
Back to selection state 610.For example, wireless power transmitter 100 can terminate identification and configuration status 630, to find energy
Enough another electronic equipments for wirelessly receiving electric power.
(4) power transmission state
In power transmission state 640, wireless power transmitter 100 sends electric power to wireless power receiver 200.
When transmitting electric power, wireless power transmitter 100 can receive Electric control from wireless power receiver 200 and disappear
Breath, and the electricity characteristic for being applied to transmit coil is controlled in response to received Electric control message.For example, for controlling
The Electric control message for being applied to the electricity characteristic of transmit coil can be included in control error information packet 5500 as shown in figure 17
In.Data packet 5500 may include notifying that it is the header 5520 for controlling error information packet and the message comprising controlling error amount
5530.Wireless power transmitter 100 can be applied to the electric power of transmit coil according to control error amount control.In other words, may be used
To control the electric current for being applied to transmit coil, so that the electric current is kept if control error amount is " 0 ", if control error amount
Then reduce the electric current for negative value, increases the electric current if control error amount is positive value.
Wireless power transmitter 100 can monitor in power transmission state 640 is based on identification information and/or configuration information
Parameter in power transmission contract generated.As monitored parameter as a result, if being sent to wireless power receiver 200
Electric power deviates from limitation included in power transmission contract, then wireless power transmitter 100 can cancel electric power and send and return
Return to selection state 610.
Wireless power transmitter 100 can be based on the Electric control message expiration transmitted from wireless power receiver 200
Power transmission state 640.
For example, if the charging of battery is when the electric power transmitted using wireless power receiver 200 is battery charging
Through completing, then for requesting the Electric control message of pause wireless power transmission that will be transferred to wireless power transmitter 100.?
In such case, wireless power transmitter 100 can receive the message for requesting pause power transmission, then terminate radio
Power transmission, returns to selection state 610.
For another instance, wireless power receiver 200 can transmit the electricity for requesting to renegotiate or reconfigure
Power control message, to correct the power transmission contract generated before.It is more greater or lesser than currently transmitted amount of power when needing
When amount of power, wireless power receiver 200 can transmit the message for requesting to renegotiate power transmission contract.In this feelings
In condition, wireless power transmitter 100 can receive the message for requesting to renegotiate power transmission contract, then terminate non-connect
Power transmission is touched, back to identification and configuration status 630.
It is passed for this purpose, the message as transmitted by wireless power receiver 200 for example can be end electric power as shown in figure 18
Transmission of data packet 5600.Data packet 5600 may include for notify its be terminate power transmission data packet header 5620, and
Message 5630 comprising indicating the end power transmission code of pause reason.Terminating power transmission code can indicate to have charged
At, internal fault, overheat, over-voltage, overcurrent, battery failures, reconfigure, without any of response and unknown error.
The communication means of multiple electronic equipments
Hereinafter, it will provide and at least one electronic equipment is sent out using wireless power signal and a wireless power
The description for sending device to execute the method for communication.
Figure 19 is to show the method that electric power is transferred at least one wireless power receiver from wireless power transmitter
Concept map.
Wireless power transmitter 100 can send electric power to one or more wireless power receivers 200 and 200 '.Figure 19
Two electronic equipments 200 and 200 ' are shown, but can be not limited to according to the method for illustrative embodiments disclosed herein
The quantity of shown electronic equipment.
According to the wireless power transmission method of wireless power transmitter 100, zone of action and detection zone can be different.Cause
This, wireless power transmitter 100, which can be determined that, to be located at according to the nothing in the zone of action of resonance coupling process or detection zone
Line power receiver, or positioned at according to the wireless power receiver in the inductively zone of action of method or detection zone.
According to definitive result, the wireless power transmitter 100 of every kind of wireless power transmission method is supported to can change for each wireless
The power transmission method of power receiver.
In the wireless power transmission according to illustrative embodiments disclosed herein, when wireless power transmitter 100
When transmitting electric power to one or more electronic equipments 200 and 200 ' according to identical wireless power transmission method, electronic equipment 200
And 200 ' wireless power signal that can not conflict between execute communication.
Referring to Fig.1 9, the first electricity can be arrived separately at by the wireless power signal 10a generated of wireless power transmitter 100
Sub- equipment 200 ' and the second electronic equipment 200.First electronic equipment 200 ' and the second electronic equipment 200 can be used generated
Wireless power signal 10a sends wireless power information.
First electronic equipment 200 ' and the second electronic equipment 200 may work as receiving the wireless of wireless power signal
Power receiver.Wireless power receiver according to illustrative embodiments disclosed herein may include receiving nothing generated
The power reception unit 291 ' of line electric power signal and 291, modulation or demodulation received wireless power signal modulating/demodulating list
The controller 292 ' and 292 of each component of member 293 ' and 293 and control wireless power receiver.
The present disclosure proposes in the wireless charging system (or wireless power transmitter/receiver) for using various communications protocols
Communication protocol selection method, allow wireless charging system in inducing method and resonance method interoperate transmitter knot
Structure, the communication means for the transmitter for allowing inducing method and resonance method to interoperate.Hereinafter, detailed description will be given.
In addition, the present disclosure proposes a kind of " Wireless Power for ensuring with discussing in WPC
The 3.2.2 chapter electric power of Transfer Volume II:Medium Power Part 1:Interface Definition " is sent
The method that device designs the interoperability of MP-A2.In more detail, the present disclosure proposes one kind by controlling error (number in reception first
According to packet) change the driving method (mode) of bridge circuit later and allows mid power (~15W) to send system and receive system with 5W
The method for interoperability of uniting.Hereinafter, its detailed description will be provided.
Change the method for the mode of wireless power transmitter according to the power information of wireless power receiver
Hereinafter, it will illustrate the illustrate by 1 system of wireless power specification part in WPC the 5th referring to Figure 20 to 32
Chapter system control in identification and the new stage is added between configuration phase and power transmission stage by mid power (~15W)
System is extended to low-power (5W) system for the technology that uses.
Firstly, providing the communication protocol in the wireless power transmitter/receiver using mid power referring to Figure 20 to 23
The description of selection method.
Figure 20 is to show the concept map of WPC communication stream, and Figure 21 is the side shown according to an illustrative embodiments
The view of communication stream in method, Figure 22 are the structural maps of the identification data packet of receiver, and Figure 23 shows presented herein
The flow chart of communication stream.
The hardware of mid power wireless power transmitter can have full-bridge construction, higher to send than existing transmitter
Power.Herein, when transmitting electric power to existing 5W receiver with full-bridge mode (or using full-bridge construction or full-bridge inverter), electricity
Pressure and electric current may be greatly unfettered.This may cause receiver to damage.
Therefore, it is necessary to a kind of permission mid power wireless power transmitters even steadily to transmit electric power to 5W receiver
Method.
It will be apparent that mid power transmitter TX steadily transmits electric power to mid power receiver RX.It may be additionally required
Interoperability between mid power transmitter TX and existing low-power reception system.For this purpose, based on the letter of the version collected by the RX
Breath, the disclosure allow TX to execute LC drive mode (half-bridge and full-bridge) conversion, thus for low-power reception system and medium
Every kind in power coded system is stable and appropriate.
As indicated, can add to existing WPC communication stream at the time of receiving the first control error after identifying receiver
Add the processing for determining version information relevant to the identification data packet collected from RX to change LC drive mode.
As more detailed example, full-bridge and half-bridge inverter can be used according to the wireless power transmitter of the disclosure
Open up benefit structure.That is, wireless power transmitter may include for switching full-bridge and half-bridge inverter (or switching full-bridge and half-bridge mould
Formula) electric power transfer unit.
Wireless power transmission method according to the disclosure may include that detection wireless power receiver whether there is in can
In the range of transmitting electric power to it with wireless method, and it will test signal and be sent to wireless power receiver.It can be by preceding
The description in face understands these processes, therefore its detailed description will be omitted.
Next, this method can also include receiving the identification information as transmitted by wireless power receiver and setting information
At least one of (S120), and from wireless power receiver receive control error information packet (S130).It is received as the information
The preliminary step of collection can execute half-bridge mode driving (S110).Herein, this method can also be included in existing WPC communication stream
The time point that the first control error is received after middle identification receiver is known collected by the wireless power receiver by determining
Version information in other data packet and change LC drive mode.Here, the disclosure can be without being limited thereto.For example, it is also possible to pass through receipts
Collect the maximum power information in addition to version information to determine low power receiver or mid power receiver.
Finally, in wireless power transmission method, in order to control the amount of power to be transmitted, wireless power transmitter can make
With the operating frequency of full-bridge or half-bridge inverter, the combination of duty ratio or power signal phase.That is, wireless power transmitter can be with
It is that mid power receiver or low-power connect based on the corresponding wireless power receiver notified by wireless power receiver
Device is received, with one of full-bridge drive mode and half-bridge driven mode driving power transmission unit (S140).
For example, in the negotiation phase with mid power, from mid power receiver receive the first control error it
Afterwards, inverter can be opened up to benefit structure and change into full-bridge (inverter) from half-bridge (inverter).
In this case, according to whether initial LC drive mode from half-bridge mode is switched to full-bridge mode or from complete
Bridge mode is switched to slab bridge mode, may cause the stability problem of receiver.This is that the rectified voltage of receiver is likely to
The conversion of the LC drive mode used due to identification power receiver and when frequency transformation and twice or half of sudden change (1/2)
Times the reason of.
In order to solve this problem, the first control error information packet can received from mid power wireless power receiver
Inverter, which is opened up benefit structure, later becomes full-bridge from half-bridge.When receiving the first control error information packet, can be based on from nothing
Version information in the collected identification data packet of line power receiver selects the amount of power to be transmitted.In more detail, show herein
In example property embodiment, wireless power transmitter initially can drive its LC at the frequency with high-gain with half-bridge mode
Circuit, and check that receiver is mid power receiver.Then it is converted to after receiving the first control error information packet
When full-bridge, frequency transformation can be the frequency with low gain by wireless power transmitter, thus prevent voltage from applying too much
To primary side (receiver-side).
As an example, transmitter can initially be driven under the high power frequency for being transferred to receiver with half-bridge mode
Dynamic lc circuit.When receiver is identified, transmitter can collect version information relevant to receiver.Herein, receiver can
By identifying that its version information is sent to transmitter by data packet (referring to fig. 2 2).Then transmitter can be in the recognition stage
Receive the version information of receiver.
Voltage corresponding with half-bridge can be used as initial voltage in the electric power transfer unit of wireless power transmitter.Cause
This, the initial voltage of half-bridge can be 12V.Furthermore, it is possible to be arranged original frequency in 135 to 145kHz (duty ratios 50%)
Range.In more detail, in order to by the test of existing low power receiver, in identification receiver (executing number ping) time-frequency
Rate can be set to 140kHz.
Next, LC drive mode can be switched to full-bridge from half-bridge, such as when the version information of receiver is more than 2.0
Fruit is not then to remain half-bridge driven mode.That is, transmitter can incite somebody to action when the version information for checking receiver is more than 2.0
Its lc circuit is switched to full-bridge mode to transmit electric power.When half-bridge is switched to full-bridge, working frequency (or driving frequency, under
In text " driving frequency ") (S150) can be converted.
In this way, wireless power transmitter can start to drive lc circuit with half-bridge mode, and it is based on version information determination
It is no that lc circuit is switched to full-bridge.
When being converted to full-bridge from half-bridge, the range for not damaging the rectifier circuit of RX can be arranged in initial frequency by TX
It is interior.As an example, only when keeping identical frequency switching drive mode, yield value can increase twice.Therefore, when RX is needed
When wanting yield value less than twice, the initial frequency of TX be can be set to more than 140kHz.That is, the driving frequency in full-bridge mode can
More than 140kHz.
Figure 24 and 25 is to show the exemplary concept map used of mid power, Figure 26 and 27 be respectively using full-bridge and
The construction view of the circuit of half-bridge.
Pid algorithm should be used to carry out the control of power transmission.As shown in figure 24, it is to be understood that when duty ratio is
40% and phase shift be 80% when, output power corresponds respectively to full-bridge.Therefore, as shown in figure 25, voltage is applied only to driving 1
Half-bridge mode can be full-bridge mode by applying alive phase shift variation to each of driving 1 and driving 2.
As more detailed numerical value, driving frequency range can be fopThe phase shift range of=110~205kHz, full-bridge can
To be 80% to 100%.In addition, driving frequency range is in fopIt can be 50% to 100% when=205kHz.
The duty cycle range of half-bridge is in fopIt can be 40% to 50% when=110~205kHz, in fopIt can when=205kHz
To be 25% to 50%.
Higher driving frequency or lower phase or duty ratio may cause to transmit lower amount of electric power.In order to transmit
The electric power of sufficient amount can use following solution control driving frequencies.
0.07 × fop-0.5kHz, for the f within the scope of 110 to 140kHzop；
0.006 × fop-0.4kHz, for the f within the scope of 140 to 205kHzop。
It,, can be in the form of the reverse signal of PWM1 or phase shifted versions in full-bridge mode referring to Figure 26 for hardware construction
The PWM2 pulse of microcomputer output terminal is generated, to drive lc circuit.In half-bridge mode, reference Figure 27, microcomputer output terminal
PWM2 pulse can be transformed to the ground signalling of driving lc circuit, and correspondingly, half-bridge output can be as shown in the first figure of Figure 25
Ground indicates.The hardware construction can change as various forms.
Figure 28 and 29 is to show the construction view of the modification using full-bridge and the circuit of half-bridge respectively.
It is different from the aforementioned illustrative embodiments using synchronous selection pass driver, in the illustrative embodiments, drive
Dynamic device can be connected respectively to switch, can be by the way that the PWM3 of microcomputer output terminal and 4 pulses to be generated as to the reversion of PWM1 and 2
Signal form or phase shifted versions drive the lc circuit of full-bridge mode.Furthermore, it is possible to by by the PWM3 arteries and veins of microcomputer output terminal
It rushes and is embodied as the reverse signal form of PWM1, PWM2 pulse is embodied as GND and PWM4 is embodied as high RST to drive half
The lc circuit of bridge mode.
In addition, the disclosure can be disclosed for converting the another exemplary embodiment initially driven.Hereinafter, will join
The another exemplary embodiment is described in more detail according to Figure 30 to 32.
Figure 30 is to show the flow chart of the communication stream according to another exemplary embodiment, and Figure 31 and 32 is to show root
According to the exemplary concept map used of the mid power of another exemplary embodiment.
As shown in Figure 30 to 32, transmitter can be before receiving the first control error according to existing WPC communication stream
Its lc circuit is initially driven with full-bridge mode under the frequency with low gain, and by receiving and collecting version information inspection
Receiver is low power receiver (S220), and receives the first control error (S230).Hereafter, transmitter can be converted to
When half-bridge mode by frequency transformation be the frequency with low gain, so that voltage be prevented to be applied to primary side (low-power too much
Receiver).
In more detail, when in order to (be held in identification receiver by the test for existing low-power interoperable receiver
Line number word ping) when needing to be more than the low frequency of 205kHz, the phase shift for full-bridge driving signal can be executed or can be with
Adjust duty ratio.For example, the initial drive frequency of full-bridge can be 205kHz, duty ratio can be 40%.
Herein, when the version information of receiver is lower than 2.0, LC drive mode can be switched to half-bridge mould from full-bridge mode
Formula (S240) can keep full-bridge mode if being not less than 2.0.When being switched to half-bridge from full-bridge, may cause to be transferred to
The problem of amount of power of receiver reduces.In order to compensate for that, driving frequency (S250) can be converted.As a reality
Example, for TX coil MP-A2, can drive lc circuit under the operating frequency of 140kHz and 40% duty ratio.Then, work as version
When this is lower than 2.0, the frequency of half-bridge can be transformed to 140kHz.
Therefore, power transmitter design MP-A2 is opened up using half-bridge and full-bridge inverter mends structure driving primary coil and string
Join capacitor.In above-mentioned defined operating frequency range, the component of primary coil and shielding has self-induction Lp=7.8uH.Series connection
The value of capacitor is Cp=328nF.The input voltage of inverter is 12V.Neighbouring resonance, the voltage across series capacitance development can
Reach more than the level of 200V pk-pk.
In this way, receiver can send transmitter for the version information of its own by identification data packet, transmitter can
To keep existing LC drive mode, until receiving the first control error.Then transmitter can be based on the version of receiver
Information determines that receiver is low power receiver or mid power receiver.According to identified as a result, transmitter can change
Become LC drive mode and conversion frequency.This can cause to eliminate the risk that high pressure is applied to receiver.
It will be appreciated by persons skilled in the art that being sent according to the wireless power of aforementioned embodiments disclosed herein
The construction of device can be applicable to other equipment, such as docking station, support unit and other electronic equipments, not include being only applicable to
The case where wireless charger.
Aforementioned embodiments and advantage are only exemplary, and are not construed as limiting the disclosure.This introduction may be easy to fit
For other kinds of device.This specification is used for example, does not limit the scope of the claims.Many replacements, change and modification
It is all apparent for those skilled in the art.Feature, structure, method and other spies of illustrative embodiments shown here
Point can combine in various ways, to be added and/or be replaced illustrative embodiments.
Since current signature can be presented as diversified forms without departing from its characteristic, so it should also be understood that aforementioned implementation
Mode is not limited by any aforementioned detailed description, unless particular determination, it otherwise should be in range as defined in the appended claims
It is inside construed broadly as, therefore falls into all changes in the boundary of claim and the equivalent of range or these boundaries and range
Change and changes one's intention in appended claims.
Claims (18)
1. a kind of from using the wireless power transmission device of full-bridge and half-bridge inverter topological structure wireless to low or mid power
The wireless power transmission method of receiver, the described method comprises the following steps:
Detect whether that there are wireless power receivers；
It will test signal and be sent to the wireless power receiver；
Identification at least one of data packet or configuration data packet are received from the wireless power receiver；
Control error information packet is received from the wireless power receiver；
If the wireless power receiver is identified as the mid power wireless receiver, missed receiving the control
After difference data packet, inverter topology is changed into full-bridge from half-bridge；And
It will be applied to full-bridge inverter by the electric power signal of at least one of control driving frequency or duty ratio, is wanted with control
The amount of power of transmission.
2. according to the method described in claim 1, being wherein based on when receiving control error information packet from the wireless power
The version information in identification data packet that receiver is collected controls the amount of power to be transmitted, and
Wherein the configuration data packet includes information about maximum power, and the wireless power receiver be based on it is described most
It is high-power to be identified as the mid power wireless receiver.
3. according to the method described in claim 1, wherein converting the driving frequency in response to the conversion from half-bridge to full-bridge.
4. according to the method described in claim 1, wherein the electric power transfer unit of wireless power transmitter is used corresponding to half-bridge
Voltage as initial voltage.
5. according to the method described in claim 1, wherein wireless power transmitter is notified based on the wireless power receiver
, the wireless power receiver correspond to mid power receiver and also correspond to low power receiver, it is inverse using full-bridge
Become one of device and half-bridge inverter and carrys out driving power transmission unit.
6. according to the method described in claim 1, wherein wireless power transmitter is identified from wireless power receiver reception
Data packet, the identification data packet include version information relevant to the wireless power receiver.
7. according to the method described in claim 1, wherein wireless power transmitter initially drives LC using half-bridge inverter
Circuit, and determine whether to change into inverter topology from half-bridge after receiving the control error information packet
Full-bridge.
8. according to the method described in claim 1, wherein being connect when the wireless power receiver is mid power receiver
It receives after the control error information packet wireless power transmitter and inverter topology is changed into full-bridge from half-bridge, when
When the wireless power receiver is low power receiver, the wireless power transmitter keeps half-bridge.
9. according to the method described in claim 1, wherein the driving frequency of full-bridge inverter is initially residing in 135kHz extremely
The range of 145kHz.
10. according to the method described in claim 1, wherein detecting whether that there are the step of wireless power receiver to be used
Driving frequency be 140kHz.
11. a kind of wirelessly from the wireless power transmitter reception electric power for using full-bridge and half-bridge inverter topological structure
Method, the method by correspond to low or mid power wireless receiver wireless power receiver execute, the method packet
Include following steps:
Detection signal is received from the wireless power transmitter；
Identification at least one of data packet or configuration data packet are sent to the wireless power transmitter；
Control error information packet is sent from the wireless power receiver to the wireless power transmitter；
The electric power signal controlled by least one of driving frequency or duty ratio is received from full-bridge inverter, to be passed with control
Defeated amount of power；
Wherein if the wireless power receiver is identified as the mid power wireless receiver, the control is being sent
After error information packet, inverter topology is changed into full-bridge from half-bridge.
12. according to the method for claim 11, wherein the wireless power receiver is sent out to the wireless power transmitter
Identification data packet is sent, the identification data packet includes version information relevant to the wireless power receiver.
13. a kind of transmit radio to low or mid power wireless receiver using full-bridge and half-bridge inverter topological structure
The wireless power transmitter of power, the wireless power transmitter are configured that
Detect whether that there are wireless power receivers；
It will test signal and be sent to the wireless power receiver；
Identification at least one of data packet or configuration data packet are received from the wireless power receiver；
Control error information packet is received from the wireless power receiver；
If the wireless power receiver is identified as the mid power wireless receiver, missed receiving the control
After difference data packet, inverter topology is changed into full-bridge from half-bridge；And
It will be applied to full-bridge inverter by the electric power signal of at least one of control driving frequency or duty ratio, is wanted with control
The amount of power of transmission.
14. wireless power transmitter according to claim 13, wherein when receiving control error information packet, based on from
The version information in identification data packet that the wireless power receiver is collected selects the amount of power to be transmitted.
15. wireless power transmitter according to claim 14, wherein in response to inverter topology from half-bridge to complete
The conversion of bridge and convert the driving frequency.
16. wireless power transmitter according to claim 13, wherein the wireless power transmitter is from the radio
Power receiver receives identification data packet, and the identification data packet includes version information relevant to the wireless power receiver.
17. a kind of wireless charging system, the wireless charging system include:
Wireless power transmitter is configured to that electric power is sent wirelessly；And
Corresponding to low or mid power wireless receiver wireless power receiver, it is configured to wirelessly from described wireless
Power transmitter receives electric power；
Wherein the electric power transfer unit of the wireless power transmitter includes the LC electricity for being configured to switch between full-bridge and half-bridge
Road；
Wherein the wireless power receiver is additionally configured to:
Control error information packet is sent from the wireless power receiver to the wireless power transmitter；And
The electric power signal controlled by least one of driving frequency or duty ratio is received from full-bridge inverter, to be passed with control
Defeated amount of power；
Wherein if the wireless power receiver is identified as the mid power wireless receiver, the control is being sent
After error information packet, inverter topology is changed into full-bridge from half-bridge.
18. wireless charging system according to claim 17, wherein the wireless power transmitter and the wireless power
Receiver is configured that
Detect whether that there are the wireless power receivers by the wireless power transmitter；
Detection signal is sent from the wireless power transmitter to the wireless power receiver；
By the wireless power transmitter from the wireless power receiver receive identification data packet or configuration data packet in
It is one few；
Control error information packet is received from the wireless power receiver by the wireless power transmitter；And
Wireless power receiver notified by the wireless power transmitter based on the wireless power receiver, described is pair
Low power receiver should be also corresponded in mid power receiver, drive the power transmission list using one of full-bridge and half-bridge
Member.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261669504P | 2012-07-09 | 2012-07-09 | |
| US61/669,504 | 2012-07-09 | ||
| US201361815126P | 2013-04-23 | 2013-04-23 | |
| US61/815,126 | 2013-04-23 | ||
| KR1020130077368A KR102099819B1 (en) | 2012-07-09 | 2013-07-02 | Wireless power transfer method, apparatus and system |
| KR10-2013-0077368 | 2013-07-02 | ||
| CN201310375830.8A CN103545938B (en) | 2012-07-09 | 2013-07-09 | Wireless power transmission method, Apparatus and system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310375830.8A Division CN103545938B (en) | 2012-07-09 | 2013-07-09 | Wireless power transmission method, Apparatus and system |
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| Publication Number | Publication Date |
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| CN105281444A CN105281444A (en) | 2016-01-27 |
| CN105281444B true CN105281444B (en) | 2018-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510652034.3A Active CN105281444B (en) | 2012-07-09 | 2013-07-09 | Wireless power transmission method, apparatus and system |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR102099819B1 (en) |
| CN (1) | CN105281444B (en) |
| ES (2) | ES2699710T3 (en) |
| HU (1) | HUE042145T2 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| ES2626053T3 (en) | 2017-07-21 |
| HUE042145T2 (en) | 2019-06-28 |
| ES2699710T3 (en) | 2019-02-12 |
| CN105281444A (en) | 2016-01-27 |
| KR102099819B1 (en) | 2020-04-10 |
| KR20140007273A (en) | 2014-01-17 |
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