CN107919737A - Wireless power transmitter and the method for wirelessly sending electric power - Google Patents

Abstract

A kind of method that the present invention provides wireless power transmitter and wirelessly sends electric power, the wireless power transmitter include converter, resonator and controller.The converter includes forming the multiple switch element of bridge circuit and is configured to respond to multiple control signal and exports exchange (AC) voltage.The resonator includes resonant capacitor and resonance coil, and is configured as receiving the AC voltages, wirelessly to send electric power.The controller is configured as performing first mode operation and second mode operation, in first mode operation, the duty cycle of the multiple control signal is fixed, the frequency of at least one control signal in the multiple control signal changes and exports the multiple control signal, in second mode operation, the frequency of the multiple control signal is fixed, and the duty cycle of at least one control signal in the multiple control signal reduces and exports the multiple control signal.

Description

Wireless power transmitter and the method for wirelessly sending electric power

This application claims know respectively on October 10th, 2016, on October 12nd, 2016 and on November 17th, 2016 in South Korea Know No. 10-2016-0130787,10-2016-0131880 and 10-2016-0153564 South Korea that property right office submits The priority and rights and interests of patent application, the complete disclosure of the korean patent application are wrapped by quoting for all purposes It is contained in this.

Technical field

Following description is related to a kind of device for being used to wirelessly send electric power, and in particular, to a kind of wireless power hair The method sent device and wirelessly send electric power.

Background technology

Recently, many mobile devices that can wirelessly charge have been had been incorporated into.Correspondingly, have been incorporated into It is used for for wirelessly transmitting power to many wireless power transmitters of mobile device, and for expanding to mobile device The demand for the charged area charged is increasing.In the case of such wireless power dispensing device, except to reducing Outside the research of the material cost of wireless power dispensing device, to while various needs are met improve convenience for users and The research for improving wireless power transmitting efficiency is also continued for.

The content of the invention

Selection of the present invention to conceive according to reduced form introduction is provided, it is further in a specific embodiment below The design is described.Present invention is not intended to determine the key feature or essential features of theme claimed, Also it is not intended to be used to help the scope for determining theme claimed.

In a general aspect, there is provided a kind of wireless power transmitter, the wireless power transmitter are configured as wirelessly Ground sends electric power.

According to embodiment, it is possible to provide a kind of wireless power transmitter, the wireless power transmitter include：Converter, bag The multiple switch element to form bridge circuit is included, and is configured to respond to multiple control signal and exports exchange (AC) voltage； Resonator, including resonant capacitor and resonance coil, and be configured as receiving the AC voltages, electric power is sent with radio； And controller, it is configured as performing first mode operation and second mode operation, it is the multiple in first mode operation The duty cycle of control signal can be fixed, and the frequency of at least one control signal in the multiple control signal can change, And exportable the multiple control signal, in second mode operation, the frequency of the multiple control signal can be consolidated Fixed, the duty cycle of at least one control signal in the multiple control signal can reduce, and exportable the multiple control Signal.

The controller also performs the third mode operation, in the third mode operation, the multiple control signal Frequency can be fixed, and the duty cycle of at least one control signal in the multiple control signal can increase, and exportable institute State multiple control signal.

The controller is also configured to make described more in response to the corresponding signal in the multiple control signal Each switching elements ON and disconnection in a switch element, at least one switch element in the multiple switch element Operation duty cycle come determine the amplitude of the AC voltages and in the multiple switch element at least one switch member The operating frequency of part determines the frequency of AC voltages.

The controller is also configured to：Setting detection duty cycle determines whether there is wireless power receiver at the same time, And based on the wireless power receiver in response to the operating frequency for detection frequency, be used to determine whether that there are the nothing Line power receiver and the operation duty cycle whether for the detection duty cycle signal the electric power that receives of frequency Difference between amplitude and the amplitude of the electric power needed by the wireless power receiver and select and perform the first mode behaviour Make and the pattern operation in second mode operation.

The controller setting detection duty cycle determines whether there is wireless power receiver at the same time, in the first mode In operating process, the controller exports the multiple control signal, so that the operation duty cycle can be fixed to the inspection Duty cycle is surveyed, and the operating frequency is changed in the range of from the first reference frequency to the second reference frequency, and In the second mode operating process, the controller exports the multiple control signal, so that the operating frequency can quilt The second reference frequency is fixed as, and makes the operation duty cycle can be from the first reference duty cycle to the detection duty cycle In the range of change.

The controller also performs the third mode operation, and in the third mode operation, the operation duty cycle can quilt It is fixed as described first and refers to duty cycle, the operating frequency can be in the range of from second reference frequency to peak frequency Change, and exportable the multiple control signal.

The bridge circuit can be the full-bridge circuit for including the first branch and the second branch, and the controller also performs The third mode operates, and in the third mode operation, the operating frequency can be fixed to second reference frequency, described The duty cycle of the first branch can be fixed to the detection duty cycle, and the duty cycle of the second branch can be change 's.

The bridge circuit can be the full-bridge circuit for including the first branch and the second branch, and the controller also performs The third mode operates, and in the third mode operation, the duty cycle of the first branch can be fixed to the detection duty Duty cycle than, the second branch can be fixed to 100%, and the operating frequency can be from second reference frequency Change in the range of to peak frequency.

According to embodiment, it is possible to provide a kind of wireless power transmitter, the wireless power transmitter include：Converter, bag The multiple switch element to form bridge circuit is included, and is configured to respond to export AC voltages in multiple control signal；Resonator, Including resonant capacitor and resonance coil, and it is configured to receive the AC voltages, wirelessly to send electric power；And control Device, is configured as performing first mode operation, second mode operation and the third mode operation, in first mode operation, The duty cycle of the multiple control signal can be fixed, and the frequency of at least one control signal in the multiple control signal can Change in the range of from the first reference frequency to the second reference frequency, and exportable the multiple control signal, described In second mode operation, the frequency of the multiple control signal can be fixed, at least one control in the multiple control signal The duty cycle of signal processed can change in the range of from the first reference duty cycle to the second reference duty cycle, and exportable described Multiple control signal, and in the third mode operation, the duty cycle of the multiple control signal can be fixed, described more The frequency of at least one control signal in a control signal can change in the range of less than first reference frequency, and Exportable the multiple control signal.

Each switch element in the multiple switch element may be in response to the corresponding letter in the multiple control signal Number and switch on and off, can be according to the operation duty cycle of at least one switch element in the multiple switch element to determine The amplitude of AC voltages is stated, and can be determined according to the operating frequency of at least one switch element in the multiple switch element The frequency of the AC voltages.

In the first mode operating process, the controller exports the multiple control signal, the multiple control Signal is with the frequency in the range of from first reference frequency to second reference frequency at the same time with first with reference to accounting for Empty ratio, in the second mode operating process, the controller exports the multiple control signal, the multiple control signal With first reference frequency, and the duty cycle of at least one control signal in the multiple control signal is from first Change in the range of duty cycle to the second duty cycle, and in the third mode operating process, the controller exports institute State multiple control signal, the multiple control signal with less than the frequency in the range of first reference frequency at the same time with Second duty cycle.

The controller also performs fourth mode operation, in fourth mode operation, the multiple control signal Frequency can be fixed, and the duty cycle of at least one control signal in the multiple control signal can be higher than the described second reference Change in the range of duty cycle, and exportable the multiple control signal.

According to embodiment, it is possible to provide a kind of wireless power transmitter, the wireless power transmitter include：Converter, bag The multiple switch element to form bridge circuit is included, and is configured to respond to multiple control signal and exports AC voltages；Resonator, Including resonant capacitor and resonance coil, and it is configured as receiving the AC voltages, wirelessly to send electric power；And control Device, is configured as performing first mode operation and second mode operation, in first mode operation, the multiple control letter Number duty cycle can be fixed, the frequency of at least one control signal in the multiple control signal can be based on from wireless power Control information that receiver receives and determine, and exportable the multiple control signal, and in second mode operation In, the frequency of the multiple control signal can be fixed, the duty of at least one control signal in the multiple control signal Determined than the control information can be based on, and the frequency that may be in response in the first mode operates determine is in reference Outside scope, the multiple control signal is exported.

The controller is also configured to setting detection duty cycle and determines whether there is the wireless power reception at the same time Device, is held by the way that the duty cycle of at least one control signal in the multiple control signal is set as the detection duty cycle The row first mode operation, at least one control signal in the multiple control signal is determined based on the control information Frequency, and the multiple control signal is exported according to the detection duty cycle and the definite frequency.

It is higher than the second reference frequency in response to the definite frequency of first mode operation, the controller may be used also It is configured as by the way that the frequency of at least one control signal in the multiple control signal is set as described second with reference to frequency Rate operates to perform the second mode, and at least one control in the multiple control signal is determined based on the control information The duty cycle of signal processed, and the multiple control letter is exported according to second reference frequency and the definite duty cycle Number.

The duty cycle in being operated in response to the second mode is less than first reference lower than the detection duty cycle Duty cycle, the controller are also configured to by by the duty of at least one control signal in the multiple control signal The third mode operation is performed than being set as described first with reference to duty cycle, the multiple control is determined based on the control information The frequency of at least one control signal in signal processed, and it is defeated with reference to duty cycle and the definite frequency according to described first Go out the multiple control signal.

The bridge circuit can be the full-bridge circuit for including the first branch and the second branch, and in response to second mould The duty cycle determined described in formula operation is less than first low than the detection duty cycle and refers to duty cycle, and the controller is also It can be configured as by controlling the switch element of the first branch to believe at least one control in the multiple control signal Number duty cycle be set as first with reference to duty cycle come perform the third mode operation, based on the control information control described second The switch element of branch determines the duty cycle of at least one control signal in the multiple control signal, and according to described Second reference frequency, described first export the multiple control signal with reference to duty cycle and the definite duty cycle.

It is less than the first reference frequency, institute in response to the determined definite frequency in being operated in the first mode Controller is stated to be also configured to by the way that the frequency of at least one control signal in the multiple control signal is set as One reference frequency operates to perform the second mode, is determined based on the control information in the multiple control signal extremely The duty cycle of a few control signal, and exported according to first reference frequency and the definite duty cycle described more A control signal.

The definite duty cycle in being operated in response to the second mode can be higher than higher than the detection duty cycle Described second refers to duty cycle, and the controller is also configured to by by least one control in the multiple control signal The duty cycle of signal processed is set as second with reference to duty cycle to perform the third mode operation, based on the control information to determine State the frequency of at least one control signal in multiple control signal, and with reference to duty cycle and described determined according to described second Frequency export the multiple control signal.

Each switch element in the multiple switch element may be in response to the corresponding control in the multiple control signal Signal processed and switch on and off, can according to the operation duty cycle of at least one switch element in the multiple switch element come really The amplitude of the fixed AC voltages, and can according to the operating frequency of at least one switch element in the multiple switch element come Determine the frequency of the AC voltages.

According to embodiment, it is possible to provide a kind of method of wireless power transmitter, the described method includes：Using forming bridge circuit Multiple switch element formed bridge circuit, to export exchange (AC) voltage in response to multiple control signal, so as to wirelessly send out Power transmission power；First mode operation is performed, performing first mode operation includes：The duty cycle of fixed the multiple control signal, makes The frequency change of at least one control signal in the multiple control signal, and export the multiple control signal；And hold Row second mode operates, and performing second mode operation includes：The frequency of fixed the multiple control signal, reduces the multiple control The duty cycle of at least one control signal in signal processed, and export the multiple control signal.

The method may also include：The third mode operation is performed, performing the third mode operation includes：Fixed the multiple control The frequency of signal processed, increases the duty cycle of at least one control signal in the multiple control signal, and exports described more A control signal.

The method may also include：Switched on and off in response to the corresponding signal in the multiple control signal described Each switch element in multiple switch element；The operation of at least one switch element in the multiple switch element accounts for It is empty than determining the amplitude of the AC voltages；And the operation frequency of at least one switch element in the multiple switch element Rate determines the frequency of the AC voltages.

The method may also include：Setting detection duty cycle determines whether there is wireless power receiver at the same time；And it is based on It is detection frequency in response to the operating frequency, is used to determine whether that there are the wireless power receiver and the operation to account for Whether sky is than that can be the amplitude of electric power and wireless power reception that the frequency of the signal for detecting duty cycle receive Difference between the amplitude of electric power needed for device and select and perform in the first mode operation and second mode operation One pattern operation.

By following embodiment, attached drawing and claim, further feature and aspect will be evident.

Brief description of the drawings

Fig. 1 is the diagram for the application for schematically showing wireless power transmitter according to the embodiment.

Fig. 2 is the diagram for schematically showing wireless power sending method according to the embodiment.

Fig. 3 is to show that wireless power transmitter is based on the distance between wireless power transmitter and wireless power receiver and changes Become the diagram for the electric power for being sent to wireless power receiver.

Fig. 4 is to show wireless power transmitter based on the alignment journey between wireless power transmitter and wireless power receiver Degree changes the diagram for the electric power for being sent to wireless power receiver.

Fig. 5 is to show that the charge volume of battery of the wireless power transmitter based on wireless power receiver changes to be sent to wirelessly The diagram of the electric power of power receiver.

Fig. 6 is the voltage shown between the transmit coil of wireless power transmitter and the receiving coil of wireless power receiver The diagram of relation between gain and operating frequency.

Fig. 7 to Figure 15 is the diagram for the configuration for schematically showing wireless power transmitter according to the embodiment.

Figure 16 is the initial mode of operation for showing wireless power transmitter according to the embodiment and wireless power sending method Under operation flow chart.

Figure 17 is to show wireless power transmitter according to the embodiment and the standby operating mode of wireless power sending method Under operation flow chart.

Figure 18 is the initial mode of operation and standby operation mould for showing wireless power transmitter and wireless power sending method The diagram of the change of boost voltage under formula.

Figure 19 A to Figure 24 H show wireless power transmitter and wireless power sending method under electric power sending mode The oscillogram of operation.

Figure 25 and Figure 26 is to schematically show change wireless power transmitter and wireless power according to the embodiment to send The diagram of the process of adjustment variable in method.

Figure 27 to Figure 46 is to show that wireless power transmitter according to the embodiment and wireless power sending method are sent out in electric power Send the operational flowchart of the operation under pattern and operating frequency is shown and operates the diagram of the change of duty cycle.

Figure 47 A and Figure 47 B are to show the coil current of wireless power transmitter according to the embodiment and showing for output voltage Figure.

Figure 48 A and Figure 48 B are the liters for the change for showing the duty cycle in the transmitter according to the embodiment according to wireless power Piezoelectricity is pressed and the diagram of output voltage.

In whole the drawings and specific embodiments, identical label indicates identical element.Attached drawing can not to scale Draw, for the sake of clear, explanation and convenience, the relative size of element, ratio and description in attached drawing can be exaggerated.

Embodiment

Detailed description below is provided, to help reader to obtain to the complete of method described here, equipment and/or system Foliation solution.However, after it understanding of present disclosure, method, equipment and/or the various of system described here change Become, modification and equivalent will be apparent.For example, the order of operation described here is only example, and it is not limited to This illustrate example, but except must according to particular order occur operation in addition to, can understand present disclosure it After make and will be apparent changing.In addition, in order to increase clearness or terseness, feature well known in the art can be omitted Description.

Feature described here can be implemented in different forms, and will not be construed as limited to described here show Example.More precisely, example described here is provided, only for showing be after present disclosure is understood Obviously implement some feasible patterns in many feasible patterns of method described here, equipment and/or system.

Throughout the specification, when such as element of layer, region or substrate be described as " " another element " on ", " even Be connected to " another element or " being attached to " another element when, its can directly " " another element " on ", " being connected to " another element, Or " being attached to " another element, or one or more other elements between them may be present.In contrast, member is worked as Part be described as " directly existing " another element " on ", " being directly connected to " another element or during " being bonded directly to " another element, Other elements between them may not be present.

As used herein, term "and/or" includes any one in listed continuous item or any two or more Any combinations.

Although can herein using term " first ", " second " and " the 3rd " come describe various components, component, region, layer or Part, but these components, component, region, layer or part should not be limited by these terms.More precisely, these terms are only For a component, component, region, layer or part and another component, component, region, layer or part to be distinguished.Therefore, exist First component, component, region, layer or part involved in the example of this description can claim in the case where not departing from exemplary teaching Make second component, component, region, layer or part.

Term as used herein is only used for describing various examples, is not limited to the disclosure.Unless in context in addition Clearly indicate, otherwise singulative is also intended to include plural form.There are upper for term " comprising ", "comprising" and " having " instruction Feature, quantity, operation, component, element and/or the combinations thereof stated, and do not preclude the presence or addition of it is one or more its Its feature, quantity, operation, component, element and/or combinations thereof.

Due to manufacturing technology and/or tolerance, the various change of shape shown in attached drawing can occur.Therefore, it is described herein Example be not limited to the given shape shown in attached drawing, but the change of the shape including occurring in manufacturing process.

Exemplary feature described here can be each will be apparent after present disclosure is understood Kind mode is combined.In addition, although example described here has a variety of constructions, present disclosure is being understood It is also feasible for will be apparent being other constructions afterwards.

Fig. 1 is the diagram for the application for schematically showing wireless power transmitter 1 according to the embodiment.

With reference to Fig. 1, wireless power transmitter 1 and wireless power receiver 2 are magnetically coupling to one another, wirelessly to send and receive Electric power.As an example, wireless power transmitter 1 and wireless power receiver 2 pass through one of magnetic resonance and magnetic induction or two Person and it is coupled to each other.

Wireless power receiver 2 provides the electric power of reception to electronic device 3.3 use of electronic device passes through wireless power The electric power that receiver 2 provides performs the operation such as charged to internal cell.Wireless power receiver 2 is used as a component It is present in electronic device 3, or to be connected to the single device of electronic device 3.

With reference to Fig. 1, wireless power receiver 2 is arranged in the position adjacent with wireless power transmitter 1, but away from radio Aligning degree between the relative distance and/or wireless power transmitter 1 and wireless power receiver 2 of power transmitter 1 is variable.By In the distance increase away from wireless power transmitter 1 or the alignment deterioration between wireless power transmitter 1 and wireless power receiver 2 And in the case of causing wireless power receiver 2 fully to receive the desired amount of electric power, wireless power transmitter 1 is in boosting mould Operated under formula, electric power stably is sent to wireless power receiver 2.In another case, due to electronic device 3 Battery needs the situation of substantial amounts of electric power and/or other similar in the case of close to electricity condition is discharged, and wireless power is sent Device 1 operates under boost mode.Alternatively, due to the distance phase between wireless power receiver 2 and wireless power transmitter 1 Short or between wireless power transmitter 1 and wireless power receiver 2 alignment is improved and wireless power receiver 2 is not received Under the desired amount of electric power or power condition more than the desired amount of electric power, or in the battery due to electronic device 3 close to filling Full power state and in the case of needing a small amount of electric power and/or it is other it is similar in the case of, wireless power transmitter 1 is being depressured Operated under pattern, to prevent unnecessary power consumption and prevent wireless power receiver 2 and/or electronic device 3 from overheating.

Fig. 2 is the flow chart for schematically showing the method according to the embodiment for being used to wirelessly send electric power.

The wireless power sending method of Fig. 2 is performed by wireless power transmitter 1.Although the flow chart of Fig. 2 be with when Between shown in sequencing, but the order of certain operations can be changed or certain operations can be omitted, and can also periodically weighed Some multiple stages.As an example, wireless power transmitter 1 periodically enters simulation ping stages (S10) and numeral ping ranks Section (S20).

Referring to Figures 1 and 2, wireless power sending method starts from wireless power transmitter 1 into the simulation ping stages (S10)。

In the ping stages are simulated, wireless power transmitter 1 sends simulation ping signals.In response to simulation ping signals Impedance level changes, and wireless power transmitter 1 determines that exterior object is located at around wireless power transmitter 1.For example, wireless power Transmitter 1 sends simulation ping signals by transmit coil or other coils, and simulates ping signals by determining to send The change of the impedance of coil or the change of the level of simulation ping signals are located at wireless power transmitter 1 week to determine exterior object Enclose.Simulation ping signals are sent according to the cycle of setting.

In response to determining that predetermined exterior object is adjacent with wireless power transmitter 1 in the ping stages are simulated, radio Power transmitter 1 enters numeral ping stages (S20).Alternatively, wireless power transmitter 1 enters numeral according to the cycle of setting The ping stages.Wireless power transmitter 1 sends numeral ping signals in the digital ping stages, to determine and wireless power transmitter Whether 1 adjacent exterior object is wireless power receiver.For example, after numeral ping signals are sent, wireless power is sent Device 1 from wireless power receiver 2 based on whether receive response signal to determine whether exterior object adjacent thereto is radio Power receiver.

Wireless power transmitter 1 enters the response signal of digital ping signals in response to receiving wireless power receiver Verification and configuration phase (S30).It is wireless power receiver in response to exterior object, wireless power receiver is sent to reception The response signal of digital ping signals.The response signal of wireless power receiver include information relevant with signal strength, with it is all Such as the relevant information of the type of mobile device or the wireless power receiver of laptop computer, relevant with input voltage intensity Information, the electricity needed with the relevant information of amount of the electric power by wireless power receiver needs and instruction by wireless power receiver Any one of poor error amount between the amount for the electric power that power and wireless power receiver are received or any two or more A variety of any combinations.Therefore, response signal of the wireless power transmitter 1 using wireless power receiver to digital ping signals To confirm target and electricity needs.

Then, wireless power transmitter 1 enters electric power transmission phase (S40), in electric power transmission phase, wireless power hair Device 1 is sent wirelessly to provide electric power to wireless power receiver using the information confirmed in verification and configuration phase (S30).

In electric power transmission phase (S40), wireless power transmitter 1 is under normal mode, boost mode or decompression mode Operation.

Normal mode for for example for the switch element that controls wireless power transmitter 1 control signal duty cycle (duty cycle) (or referred to as " duty " (duty)) it is fixed to any value, and the operating frequency of wireless power transmitter 1 The operator scheme changed in preset reference range.The value that duty cycle is fixed is used to send simulation as described above to produce Ping signals and/or numeral ping signals are used to determine whether that there are the control signal of other of wireless power receiver signal Duty cycle.The term of reference of operating frequency is the available frequency range of standard by restriction, and can also be by examining Consider the degree of heat of wireless power receiver or the sky to charge using wireless power transmitter in available frequency range Between region scope and definite scope, and by considering the electricity between wireless power transmitter 1 and wireless power receiver 2 The scope that power transmission characteristic determines.

Boost mode is such operator scheme of such as wireless power transmitter 1：Under boost mode, wireless power connects Receive the amount for the electric power that device 2 is operating as receiving more than the amount for the electric power that ratio is received in normal mode.The adjustment of wireless power transmitter 1 accounts for Sky is adjusted to less than the arbitrary value in term of reference than or by operating frequency, more to allow wireless power receiver 2 to receive The amount of electric power.

Decompression mode is such operator scheme of such as wireless power transmitter 1：In buck mode, wireless power connects Receive the amount that device 2 is operating as receiving the few electric power of amount of electric power than being received in normal mode.The adjustment of wireless power transmitter 1 accounts for Sky is adjusted to more than the arbitrary value in term of reference than or by operating frequency, less to allow wireless power receiver 2 to receive The amount of electric power.

Although Fig. 2 shows wireless power transmitter 1 using simulation ping signals and numeral ping signals to determine wirelessly The example that power receiver 2 whether there is, but wireless power transmitter 1 is also by using the signal in addition to ping signals To determine that wireless power receiver 2 whether there is.

In addition, although Fig. 2 shows that wireless power transmitter 1 performs simulation ping stages and numeral ping stages to determine The example that wireless power receiver 2 whether there is, but wireless power transmitter 1 can also determine wirelessly in a different manner Power receiver 2 whether there is.For example, wireless power transmitter 1 is also by using the single local communication electricity of such as bluetooth Road determines that wireless power receiver 2 whether there is, and is also determined by a stage or three or more stages Whether exterior object is adjacent with wireless power transmitter 1 and whether definite adjacent object is wireless power receiver.

Fig. 3 be show wireless power transmitter 1 based between wireless power transmitter 1 and wireless power receiver 2 away from From the diagram for the electric power that change is sent to wireless power receiver 2, and show the electronics dress including wireless power receiver 2 Put 3 and wireless power transmitter 1.

Fig. 3 shows situation (a1) to situation (c1).Situation (a1) shows that wireless power receiver 2 is installed on radio Example on power transmitter 1, situation (b1) show wireless power receiver 2 and 1 spaced apart threshold value of wireless power transmitter The example of distance Dt or distance D1 less than interval threshold distance Dt, situation (c1) show wireless power receiver 2 with it is wireless The example of power transmitter 1 spaced apart threshold distance Dt or the distance D2 more than interval threshold distance Dt.

In situation (c1), compared with situation (a1) or situation (b1), in order to make wireless power receiver 2 receive aequum Electric power, wireless power transmitter 1 needs to send larger amount of electric power.On the contrary, in the example of situation (a1), with situation (b1) Or situation (c1) is compared, even if when wireless power transmitter 1 sends less amount of electric power, wireless power receiver 2 also receives The desired amount of electric power.

In the example shown in fig. 3, interval threshold distance Dt is having when being sent in the normal mode with maximum power Imitate charging distance.

When the distance between wireless power transmitter and wireless power receiver are equal to interval threshold distance or less than interval During threshold distance, wireless power transmitter 1 operates in the normal mode.That is, in situation (a1) and/or situation (b1) Under, wireless power transmitter 1 operates in the normal mode, in the normal mode, the operation frequency that duty cycle is fixed and switched Rate changes to adjust output.

In addition, when the distance between wireless power transmitter 1 and wireless power receiver 2 are equal to interval threshold distance or big In interval threshold apart from when, wireless power transmitter 1 operates under boost mode, to form stronger output.That is, In situation (c1), wireless power transmitter 1 adjusts duty cycle, or in addition adjusts operating frequency.

Alternatively, wireless power transmitter 1 operates in the normal mode in situation (b1), with decompression also in situation (a1) Pattern operates.

Fig. 4 is to show wireless power transmitter 1 based on pair between wireless power transmitter 1 and wireless power receiver 2 Accuracy changes the diagram for the electric power for being sent to wireless power receiver 2, and shows the electronics for including wireless power receiver 2 Device 3 and wireless power transmitter 1.

Fig. 4 shows situation (a2) to situation (c2), wherein, situation (a2) is center and the nothing of wireless power receiver 2 The example that the center of line power transmitter 1 coincides with one another, situation (b2) are center and the wireless power hair of wireless power receiver 2 The separated distance L1 in center of device 1 is sent to be less than or equal to the example of interval threshold distance Lt, situation (c2) shows wireless power The center of receiver 2 and the separated distance L2 in the center of wireless power transmitter 1 showing equal to or more than interval threshold distance Lt Example.

Compared with situation (a2) or situation (b2), in situation (c2), in order to make wireless power receiver 2 receive aequum Electric power, wireless power transmitter 1 need send more amount electric power.On the contrary, compared with situation (b2) or situation (c2), in feelings Under condition (a2), even if wireless power transmitter 1 sends less amount of electric power, wireless power receiver 2 also receives the desired amount of electricity Power.

In the illustrated example, interval threshold distance Lt is effective charging when being sent in the normal mode with maximum power Distance.

Similar to the situation described in Fig. 3, in situation (a2) and/or situation (b2), wireless power transmitter 1 is normal Operated under pattern.In situation (c2), wireless power transmitter 1 operates under boost mode.Alternatively, in situation (a2), Wireless power transmitter 1 can also operate in buck mode.

Fig. 5 is the amount for the charging power for showing battery of the wireless power transmitter 1 based on wireless power receiver 2 and changes electricity The diagram of power.

Battery charge volume close in fully charged example (situation (a3)), wireless power receiver needs small amount Electric power, battery charge volume close in the example (situation (c3)) being discharged, wireless power receiver needs more amount Electric power.

Wireless power transmitter 1 from 2 received signal of wireless power receiver in response to determining operator scheme.Show at this In example, in situation (b3), wireless power transmitter operates in the normal mode.In addition, in situation (c3), wireless power hair Device is sent to be operated under boost mode.In addition, in situation (a3), wireless power transmitter operates in buck mode.

Fig. 6 is the voltage shown between the transmit coil of wireless power transmitter and the receiving coil of wireless power receiver The diagram of relation between gain and operating frequency.In figure 6, X-axis represents operating frequency, and Y-axis represents voltage gain.

With reference to Fig. 6, in the normal mode, the switch fixed duty cycle of wireless power transmitter and in the first reference frequency Operating frequency is adjusted between f1 and the second reference frequency f2.Duty cycle under normal mode be by wireless power transmitter using Lai Determine the duty cycle for the signal that wireless power receiver whether there is.In the normal mode, when wireless power receiver 2 be located at away from When at 1 preset distance of wireless power transmitter, wherein wireless power transmitter 1 needs the electric power of more amount to be connect to wireless power Receive device 2 to charge, wireless power transmitter increases the amount of the electric power for wireless power receiver 2 by reducing frequency. Alternatively, in the normal mode, when wireless power receiver 2, which is located at, closely to be located away from wireless power transmitter 1, wherein wirelessly Power transmitter 1 needs less amount of electric power, and wireless power transmitter 1 is received by increasing frequency to reduce for wireless power The amount of the electric power of device 2.

In addition, when the amount of the electric power needed by wireless power receiver 2 is higher than wireless power receiver 2 in the normal mode During the maximum of the electric power of reception, operator scheme is changed into boost mode by wireless power transmitter 1, so that wireless power receives The amount that device 2 receives electric power with receiving in the normal mode is equal or compare electric power more than the amount of the electric power received in the normal mode Amount.In this case, the operating frequency of wireless power transmitter is fixed to the first operating frequency f1, and adjusts duty Than.Even if the in addition, electric power received when increasing to the limiting value of scope of restriction when duty cycle by wireless power receiver Amount be also insufficient to it is more in the case of, wireless power transmitter 1 further reduces behaviour after duty cycle to be fixed as to limiting value Working frequency.The detailed operation under boost mode is described below.

In addition, the amount for working as the electric power needed by wireless power receiver 2 is less than the electric power received in the normal mode most During small value, operator scheme is changed into decompression mode by wireless power transmitter 1.In this case, wireless power transmitter 1 Operating frequency is fixed to the second reference frequency f2, and adjusts duty cycle.Alternatively, wireless power transmitter is operable as entirely Bridge, is then operable as half-bridge.The detailed operation under decompression mode is described below.

First reference frequency f1 and the second reference frequency f2 can be respectively equal to minimum frequency f_min and peak frequency f_max. Minimum frequency f_min and peak frequency f_max is respectively the lower limit of the available frequency range limited by standard or other agreements And upper limit value.Alternatively, the first reference frequency f1 and the second reference frequency f2 also can be by considering in minimum frequency f_min to most The degree of heat of wireless power receiver 2 or the sky to be charged using wireless power transmitter 1 in the range of big frequency f_max Between the scope in region determine.By determining the first reference frequency f1 and the second reference frequency f2, wireless power hair as described above Send device 1 more stably to be operated in the range of restriction, and prevent the component wear or overheat in wireless power receiver 2.

Alternatively, the first reference frequency f1 and the second reference frequency f2 by considering in minimum frequency f_min to most respectively Power transmission characteristics in the range of big frequency f_max between wireless power transmitter 1 and wireless power receiver 2 are come true respectively It is fixed.

Operating frequency as shown in Figure 6 within a predetermined range in the case of, since gain is according to the change of the change of frequency Changing will not be excessive or will not be too low, therefore is easy to control wireless power transmitter 1, so that wireless power receiver 2 receives properly The electric power of amount.However, due to when operating frequency is less than or equal to the first reference frequency f1, gain is according to the change of operating frequency Change can be excessively big, and when operating frequency reaches the second reference frequency f2 or higher, gain is according to the change of operating frequency The change of change can be excessively small, and therefore, it is difficult to control wireless power transmitter 1 to make wireless power receiver 2 receive proper amount of electricity Power.

In view of above-mentioned each side, when wireless power transmitter 1 operates in the normal mode, the first reference frequency f1 and Second reference frequency f2 is determined so that gain according to the change of the change of operating frequency in term of reference.That is, With reference to curve map shown in Fig. 6, the first reference frequency f1 is confirmed as such frequency：In minimum frequency f_min to maximum In the range of frequency f_max, gain is predetermined maximum at the first reference frequency f1 according to the change of the change of frequency.This Outside, the second reference frequency f2 is confirmed as such frequency：In the range of minimum frequency f_min to peak frequency f_max, gain At the second reference frequency f2 it is predetermined minimum value according to the change of the change of frequency.

By determining that the first reference frequency f1 and the second reference frequency f2, wireless power transmitter 1 prevent nothing as described above Component wear or overheat in line power receiver 2, and accurately control the electric power for being sent to wireless power receiver.

Determine in advance and preset the first reference frequency f1 and the second reference frequency f2, or can be from external input first Reference frequency f1 and the second reference frequency f2.Alternatively, can also be sent out after the operation of wireless power transmitter 1 in wireless power Send and the first reference frequency f1 and the second reference frequency f2 is set or changed in device 1.In order to set or change the first reference frequency f1 With the second reference frequency f2, therefore wireless power transmitter 1 is used to calculate reference frequency using other hardware configuration to perform The program of both f1 and f2.

In addition, as shown in fig. 6, voltage gain can have maximum at resonant frequency f_r.Resonant frequency f_r is following By the resonant frequency of the resonator of the wireless power transmitter of description.In this example, minimum frequency f_min is resonant frequency f_r About 110%, peak frequency f_max be resonant frequency f_r about 150%.

Fig. 7 is to schematically show the wireless power transmitter 1 according to the embodiment including circuit 100 and controller 200 Configuration block diagram.Circuit 100 includes 110 resonator 120 of converter.In the figure 7, reference number 300 represents input power.

Circuit 100 receives input voltage vin from input power 300, and wireless in response at least one control signal con Ground sends electric power.The amount and frequency of the electric power wirelessly sent can be changed by control signal con.

Input voltage vin is converted to exchange (AC) voltage Vac by converter 110 in response to control signal con, and is exported Transformed AC voltages.The amplitude and frequency of AC voltages Vac is determined according to control signal con.For example, the width of AC voltages Vac Value is determined according to the duty cycle of control signal con.In one example, in response to there is multiple control signal con, control letter The duty cycle of number control signal or full control signal in number con determines the amplitude of AC voltages Vac.In addition, AC voltages Vac Frequency determined according to the frequency of control signal con.In one example, in response to there is multiple control signal con, control The frequency of number control signal or full control signal in signal con determines the frequency of AC voltages Vac.

The frequency of AC voltages Vac is more than the resonant frequency f_r (Fig. 6) of resonator 120.For example, the frequency of AC voltages Vac is also It is confirmed as between about 110% to about 150% of the resonant frequency f_r (Fig. 6) positioned at resonator 120.

Converter 110 can be realized in a variety of manners.For example, resonator 110 is boost converter and inverter, or only For inverter.Converter 110 may also include perform boost converter function and inverter function both boosting inverter.

Resonator 120 is provided with AC voltage Vac, and sends and be used to determine that wireless power receiver 2 whether there is all The signal of ping signals or numeral ping signals is such as simulated, or wirelessly sends electric power.Resonator 120 leads to according to AC voltages Vac Cross change surrounding magnetic field and wirelessly send signal and/or electric power.Resonator 120 includes resonant capacitor and resonance coil, humorous Shake device 120 resonant frequency f_r (Fig. 6) by the capacitance of resonant capacitor and the inductance of resonance coil and determine.

Controller 200 exports at least one control signal con in response to request signal req.Controller 200 is in response to request The duty cycle and/or frequency of signal req adjustment control signals con.Request signal req is inputted from wireless power receiver 2, and Show the amount of 2 required electric power of wireless power receiver.For example, request signal req, which is request, passes through wireless power transmitter 1 The increased signal of amount of the electric power wirelessly sent, or the signal of the amount reduction of request electric power.Alternatively, request signal req Be the electric power of the amount and wireless power receiver actual received that represent the required electric power of wireless power receiver amount between Poor signal.Controller 200 determines increase based on request signal req or reduces the amount of transmitted electric power, and phase Answer the operation duty cycle and operating frequency of ground adjustment control signal con.

For example, controller 200 adjusts operating frequency in the normal mode, and in boost mode or decompression mode adjustment behaviour Make duty cycle, or both adjustment operation duty cycle and operating frequency.For example, in the normal mode, controller 200 is in response to wireless The distance between power receiver 2 and wireless power transmitter 1 increase and reduce frequency, reduce in response to distance and increase frequency Rate.In addition, under boost mode or decompression mode, controller 200 is in response to wireless power receiver 2 and wireless power transmitter The distance between 1 increases and increases duty cycle, reduces in response to distance and reduces duty cycle.

As an example, when operating frequency corresponds to minimum reference frequency and performs Normal Mode Operation, if request The amount of signal req request increase electric power, then controller 200 performs control, so that operator scheme is switched to boosting from normal mode Pattern.

As another example, when operating duty cycle corresponding to minimum reference duty cycle and performing boost mode operation, If request signal req requests reduce the amount of electric power, controller 200 performs control, so that operator scheme is cut from boost mode Change to normal mode.

Controller 200 and controller 201 according to the embodiment are described below with reference to Figure 16 to Figure 46 to controller 208 detailed operation.

As shown in fig. 7, controller 200 includes at least one processor 200a.According to embodiment, controller 200 further includes Memory 200b.Processor 200a includes central processing unit (CPU), image processing unit (GPU), microprocessor, special collection Into circuit (ASIC) and/or field programmable gate array (FPGA), and there can be multinuclear.Memory 200b is volatile storage Device (for example, random access memory (RAM)), nonvolatile memory (for example, read-only storage (ROM) or flash memory) or they Combination.The program of instruction including being configured as performing corresponding wireless power sending method is stored in memory.

Controller 200 includes gate drivers.Alternatively, wireless power transmitter 1 individually includes gate drivers or bag Include and be externally incorporated its gate drivers, for driving conversion according to the control signal con provided by controller 200 The switch that device 110 includes.

300 output-input voltage Vin of input power.For example, input power 300 is will be from externally input exchange (AC) electricity Pressure is converted to direct current (DC) voltage and exports the adapter of transformed D/C voltage.The input electricity exported from input power 300 The level for pressing Vin is one in the various voltage levels being standardized during wireless power sends and receives system.It is for example, defeated Enter voltage for one in 5V, 9V and 12V.

Fig. 8 is to schematically show the wireless power transmitter 1- according to the embodiment including circuit 101 and controller 201 The diagram of 1 configuration.Circuit 101 includes 111 resonator 121 of converter.Converter 111 include switch element Q11 and Q21, First coil L11 and the first capacitor C11.Resonator 121 includes the second capacitor C21 and the second coil L21.

Circuit 101, converter 111, resonator 121, controller 201 and input power 300 function can respectively with Fig. 7 Circuit 100, converter 110, resonator 120, controller 200 and the input power 300 of description are substantially the same.

The amplitude of the AC voltages exported from converter 111 is according to the amplitude of the voltage (that is, boost voltage) of section point N2 And determine.The amplitude of boost voltage Vboost is determined by formula 1.

[formula 1]

Vboost=Vin/ (1-D)

In formula 1, Vin is the amplitude of the voltage of the electric power inputted from input power 300, and D is second control signal con21 Duty cycle (ON-duty cycle).

Duty cycle under boost mode is more than the duty cycle under normal mode.Therefore, the boost voltage under boost mode is big Boost voltage under normal mode, therefore, the amount by the wireless power transmitter 1-1 electric power sent under boost mode are big In the amount of the electric power sent in the normal mode by wireless power transmitter 1-1.

In addition, the voltage of first node N1 is the AC voltages exported from converter 111, the AC electricity exported from converter 111 Pressure Vinv (t) is determined by formula 2.

[formula 2]

Vinv (t)=2 (Vin/ (1-D)) sin (wt/ π)

In formula 2, w represents the frequency of first control signal con11 and second control signal con21.

First coil L11 is connected between the terminal and first node N1 that apply input voltage.First switching element Q11 connects It is connected between first node N1 and section point N2.Second switch element Q21 is connected between first node N1 and ground terminal. First capacitor C11 is connected between section point N2 and ground terminal.Pass through the AC voltage outputs that converter 111 produces to One node N1.The voltage of section point N2 is the boost voltage for obtaining input voltage boosting by converter 111.First opens Close element Q11 to switch on and off in response to first control signal con11, second switch element Q21 believes in response to the second control Number con21 and switch on and off.In addition, first switching element Q11 and second switch element Q21 connect on and off complimentary to one anotherly Open.

In other words, converter 111 includes bridge circuit, and bridge circuit includes being serially connected and being configured as alternately The first switch Q11 and second switch Q21 of operation.A terminal of inductor L11 is connected to an end of input power 300 Son, the another terminal of inductor L11 are connected to the connection terminal (node N1) between first switch and second switch.Output capacitance A terminal of device (that is, the first capacitor) C11 is connected to a terminal of half-bridge circuit, the other end of output capacitor C11 Son is connected to the another terminal of input power 300 and the another terminal of half-bridge circuit.

In embodiment, converter 111 performs the duty according to control signal con11 and con21 as boost converter Than making input voltage boost to the function of boost voltage and D/C voltage being converted to the function of AC voltages as inverter execution. Specifically, switch element Q11 and Q21, the first capacitor C11 and first coil L11 operations are boost converter.In addition, open Close element Q11 and Q21 and be further operative to inverter.In other words, converter 111 include with boost converter and inverter that This combines and is used in conjunction with the boosting inverter of the form of switch element Q11 and Q21.

More particularly, by form half-bridge circuit switch element Q11 and Q21 switching manipulation in the first capacitor Stored charge in C11, so that the voltage at the first capacitor C11 both ends is changed into boost voltage.Boost voltage is by making by input electricity Input voltage boosting that source 300 provides and obtain, the duty cycle that the amplitude of boost voltage passes through control signal con11 and con21 And determine.In addition, grasped by using in output capacitor C11 by the switch of the switch element Q11 and Q21 that form half-bridge circuit The AC voltages that the boost voltage made and accumulated produces are applied in the both ends of resonator 121.The amplitude of AC voltages passes through boost voltage Amplitude and determine.The frequency of AC voltages is determined by the frequency of control signal con11 and con21.

In embodiment, the switching manipulation of switch element Q11 and Q21 according to the pattern of wireless power transmitter 1-1 and by Differently control.

Second capacitor C21 and the second coil L21 are connected in series between first node N1 and ground terminal.Second capacitance Device C21 is resonant capacitor, and the second coil L21 is resonance coil, and LC is provided by the second capacitor C21 and the second coil L21 Resonance.Therefore, the resonant frequency f_r (Fig. 6) of resonator 121 passes through the capacitance of the second capacitor C21 and the electricity of the second coil L21 Feel and determine.That is, the inductance of the capacitance of the second capacitor C21 and the second coil L21 are according to wireless power transmitter 1-1 The general environment (for example, wireless power transmission standard) that is used and determine.The frequency range of control signal con11 and con21 It is based respectively on according to the identified capacitance of the second capacitor C21 and the identified inductance of the second coil L21 and definite humorous Vibration frequency determines.

Controller 201 output control signal con11 and con21 in response to request signal req.Controller 201 in response to Request signal req and adjust the duty cycle and/or frequency of control signal con11 and con21.

Fig. 9 is to schematically show the wireless power transmitter 1- according to the embodiment including circuit 102 and controller 202 The diagram of 2 configuration.Circuit 102 includes 112 resonator 122 of converter.Converter 112 include switch element Q12 and Q22, First coil L12, the first capacitor C12 and diode D.Resonator 122 includes the second capacitor C22 and the second coil L22.

Circuit 102, converter 112, resonator 122, controller 202 and input power 300 function can respectively with Fig. 7 The circuit 100 of description, converter 110, resonator 120, the function of controller 200 and input power 300 are substantially the same.In addition, The configuration and operation of resonator 122 can be identical with the configuration and operation of the resonator 121 described in Fig. 8.

First coil L12 is connected between the terminal and first node N1 that apply input voltage.First switching element Q12 connects It is connected between first node N1 and section point N2.Second switch element Q22 is connected between first node N1 and ground terminal. First capacitor C12 is connected between section point N2 and ground terminal.Diode D is connected to section point N2 and applies and inputs Between the terminal of voltage.Pass through the AC voltage outputs that converter 112 produces to first node N1.The voltage of section point N2 is logical Cross the boost voltage that converter 112 makes input voltage boost and obtains.First switching element Q12 is in response to first control signal Con12 and switch on and off, second switch element Q22 is switched on and off in response to second control signal con22.In addition, the One switch element Q12 and second switch element Q22 are switched on and off complimentary to one anotherly.

The operation of converter 112 can refer to the operation of the converter 111 described in Fig. 8 and be readily appreciated that.In addition, such as Fig. 9 It is shown, the half-bridge circuit Q12 and Q22 of both functions of function and inverter of the converter 112 including execution boost converter. That is converter 112 includes boost converter and inverter, boost converter and inverter common switching element Q12 and Q22。

Since converter 112 includes being used to prevent backward current from flowing through the two of the terminal for applying input voltage from boost node Pole pipe D, therefore converter 112 is configured to prevent from being switched by the complementarity of first switching element Q12 and second switch element Q22 Ripple (ripple) caused by operation.

Figure 10 is to schematically show the wireless power transmitter according to the embodiment including circuit 103 and controller 203 The diagram of the configuration of 1-3.Circuit 103 includes 113 resonator 123 of converter.Converter 113 include switch element Q13 and Q23, first coil L13 and the first capacitor C13.Resonator 123 includes the second capacitor C23 and the second coil L23.

Circuit 103, converter 113, resonator 123, controller 203 and input power 300 function can respectively with Fig. 7 The circuit 100 of description, converter 110, resonator 120, the function of controller 200 and input power 300 are substantially the same.In addition, The configuration and operation of resonator 123 can be identical with the configuration and operation of the resonator 121 described in Fig. 8.

First coil L13 is connected between the terminal and first node N1 that apply input voltage.First switching element Q13 connects It is connected between first node N1 and section point N2.Second switch element Q23 is connected between first node N1 and ground terminal. First capacitor C13 is connected between section point N2 and the terminal for applying input voltage.The AC electricity produced by converter 113 Pressure is output to first node N1.The voltage of section point N2 is the boosting for obtaining input voltage boosting by converter 113 Voltage.First switching element Q13 is switched on and off in response to first control signal con13, second switch element Q23 in response to Second control signal con23 and switch on and off.In addition, first switching element Q13 and second switch element Q23 are complimentary to one anotherly Switch on and off.

The operation of converter 113 can refer to the operation of the converter 111 described in Fig. 8 and be readily appreciated that.In addition, such as Figure 10 It is shown, the half-bridge circuit Q13 and Q23 of both functions of function and inverter of the converter 113 including execution boost converter. That is converter 113 includes boost converter and inverter, boost converter and inverter common switching element Q13 and Q23。

Converter 113 becomes input voltage by the initial voltage of the first capacitor C13 and improves initial operation Energy.In addition, converter 113 prevents the ripple caused by meeting when performing boosting by the blocked operation of switch element Q13 and Q23.

Figure 11 is to schematically show the wireless power transmitter according to the embodiment including circuit 104 and controller 204 The diagram of the configuration of 1-4.Circuit 104 includes 114 resonator 124 of converter.Converter 114 include switch element Q14, Q24, Q34 and Q44, first coil L14 and the first capacitor C14.Resonator 124 includes the second capacitor C24 and the second coil L24.

Circuit 104, converter 114, resonator 124, controller 204 and input power 300 function can respectively with Fig. 7 The circuit 100 of description, converter 110, resonator 120, the function of controller 200 and input power 300 are substantially the same.In addition, The configuration and operation of resonator 124 can be identical with the configuration and operation of the resonator 121 described in Fig. 8.

First coil L14 is connected between the terminal and first node N1 that apply input voltage.First switching element Q14 connects It is connected between first node N1 and section point N2.Second switch element Q24 is connected between first node N1 and ground terminal. 3rd switch element Q34 is connected between section point N2 and the 3rd node N3.4th switch element Q44 is connected to the 3rd node Between N3 and ground terminal.First capacitor C14 is connected between section point N2 and ground terminal.First node N1 and the 3rd Voltage between node N3 is the AC voltages produced by converter 114.The voltage of section point N2 is to be made by converter 114 The boost voltage that input voltage boosts and obtains.First switching element Q14 connects on and off in response to first control signal con14 Open, second switch element Q24 is switched on and off in response to second control signal con24.3rd switch element Q34 is in response to Three control signal con34 and switch on and off.4th switch element Q44 connects on and off in response to the 4th control signal con44 Open.In addition, first switching element Q14 and second switch element Q24 are switched on and off complimentary to one anotherly, the 3rd switch element Q34 With the 4th switch element Q44 it is complimentary to one another switch on and off.3rd switch element Q34 is remained off, or is opened with second Element Q24 is closed to be also turned on and disconnect.In addition, the 4th switch element Q44 is remained turned on, or with first switching element Q14 It is also turned on and disconnects.

Resonator 124 is connected between first node N1 and the 3rd node N3.

That is, converter 114 is implemented as full-bridge circuit.In some cases, the 3rd switch element Q34 keeps disconnected Open state, the 4th switch element Q44 are remained turned on, to make converter be operated in a manner of identical with half-bridge circuit.3rd Switch element Q34 is also turned on and disconnects with second switch element Q24, and the 4th switch element 44 and first switching element Q14 are same When switch on and off, to make converter 114 be operated in a manner of identical with full-bridge circuit.In some cases, the 3rd switch member Part Q34 and the 4th switch element Q44 are different from each time in second switch element Q24 and first switching element Q14 Time be respectively turned on and disconnect, then converter 114 is also operating as full-bridge circuit.

Figure 11 illustrates embodiment in, first coil L14, the first capacitor C14, first switching element Q14 and Two switch element Q24 are used as boost converter.In addition, figure 11 illustrates embodiment in, first switching element Q14, second Switch element Q24, the 3rd switch element Q34 and the 4th switch element Q44 are used as inverter.That is, first switching element Q14 and second switch element Q24 are operating as boost converter, while being operating as inverter.In other words, boosting turns Parallel operation and inverter share first switching element Q14 and second switch element Q24 and are bonded to each other.

Output voltage Vinv (t) (that is, the first node N1 and of the converter 114 of the wireless power transmitter 1-4 of Figure 11 Voltage between three node N3) determined by formula 3.

[formula 3]

Vinv (t)=4 (Vin/ (1-D)) sin (wt/ π)

In formula 3, Vin is the amplitude of the voltage of the electric power inputted from input power 300, and D is second control signal con24 Duty cycle, w is the frequency of control signal con14, con24, con34 and con44.

That is, according to the embodiment of Figure 11, when compared with half-bridge circuit, due to obtaining and double input voltage The identical effect of effect, therefore the current stress of coil is reduced, and further improve efficiency.

Figure 12 is to schematically show the wireless power transmitter according to the embodiment including circuit 105 and controller 205 The diagram of the configuration of 1-5.Circuit 105 includes 115 resonator 125 of converter.Converter 115 include switch element Q15, Q25, Q35 and Q45, first coil L15, tertiary coil L35 and the first capacitor C15.Resonator 125 include the second capacitor C25 and Second coil L25.

Circuit 105, converter 115, resonator 125, controller 205 and input power 300 function can respectively with Fig. 7 The circuit 100 of description, converter 110, resonator 120, the function of controller 200 and input power 300 are substantially the same.In addition, The configuration and operation of resonator 125 can be identical with the configuration and operation of the resonator 121 described in Fig. 8.

First coil L15 is connected between the terminal and first node N1 that apply input voltage.First switching element Q15 connects It is connected between first node N1 and section point N2.Second switch element Q25 is connected between first node N1 and ground terminal. 3rd switch element Q35 is connected between section point N2 and the 3rd node N3.4th switch element Q45 is connected to the 3rd node Between N3 and ground terminal.Tertiary coil L35 is connected between the terminal and the 3rd node N3 that apply input voltage.First capacitance Device C15 is connected between section point N2 and ground terminal.Voltage between first node N1 and the 3rd node N3 is by turning The AC voltages that parallel operation 115 produces.The voltage of section point N2 is the boosting for obtaining input voltage boosting by converter 115 Voltage.First switching element Q15 is switched on and off in response to first control signal con15, second switch element Q25 in response to Second control signal con25 and switch on and off.3rd switch element Q35 connected in response to the 3rd control signal con35 and Disconnect.4th switch element Q45 is switched on and off in response to the 4th control signal con45.In addition, first switching element Q15 With second switch element Q25 it is complimentary to one another switch on and off, the 3rd switch element Q35 and the 4th switch element Q45 are mutually Switch on and off with mending.3rd switch element Q35 is remained off, or is also turned on and is disconnected with second switch element Q25. 4th switch element 45 remains turned on, or is also turned on and disconnects with first switching element Q15.

Resonator 125 is connected between first node N1 and the 3rd node N3.

That is, converter 115 is implemented as full-bridge circuit.In some cases, the 3rd switch element Q35 keeps disconnected Open state, the 4th switch element 45 remain turned on, and to make converter be operated in a manner of identical with half-bridge circuit, the 3rd opens Close element Q35 and second switch element Q25 to be also turned on and disconnect, the 4th switch element 45 and first switching element Q15 is at the same time Switch on and off, to make converter 115 be operated in a manner of identical with full-bridge circuit.In some cases, the 3rd switch element Q35 and the 4th switch element 45 are when different from each time in second switch element Q25 and first switching element Q15 Between be respectively turned on and disconnect, then converter 115 is also operating as full-bridge circuit.

Figure 12 illustrates embodiment in, first coil L15, tertiary coil L25, the first capacitor C15, first switch Element Q15, second switch element Q25, the 3rd switch element Q35 and the 4th switch element Q45 operations are boost converter.First Switch element Q15, second switch element Q25, the 3rd switch element Q35 and the 4th switch element Q45 operations are inverter.Also It is to say, first switching element Q15, second switch element Q25, the 3rd switch element Q35 and the 4th switch element Q45 operations are liter Pressure converter, while being used as inverter.In other words, boost converter and inverter share first switching element Q15, Two switch element Q25, the 3rd switch element Q35 and the 4th switch element Q45 and it is bonded to each other.

According to the embodiment of Figure 12, since converter is used as full-bridge circuit, when compared with half-bridge circuit, obtain with it is double Input voltage the identical effect of effect, therefore reduce the current stress of coil, and improve efficiency.Further, since 3rd switch element Q35 and the 4th switch element Q45 is also to making input voltage boosting contribute, therefore have relatively low capacitance Capacitor is used as the first capacitor C15.

Figure 13 is to schematically show the wireless power transmitter according to the embodiment including circuit 106 and controller 206 The diagram of the configuration of 1-6.Circuit 106 includes 116 resonator 126 of converter.Converter 116 includes switch element Q16, Q26 With Q56, first coil L16, the first capacitor C16 and diode D.Resonator 126 includes the second capacitor C26 and the second coil L26。

Circuit 106, converter 116, resonator 126, controller 206 and input power 300 function can respectively with Fig. 8 The circuit 101 of description, converter 111, resonator 121, the function of controller 201 and input power 300 are substantially the same.In addition, The configuration and operation of resonator 126 can be identical with the configuration and operation of the resonator 121 described in Fig. 8.

First coil L16 and the 5th switch element Q56, which is connected in series in, applies input voltage to its terminal and first segment Between point N1.First switching element Q16 is connected between first node N1 and section point N2.The Q26 connections of second switch element Between first node N1 and ground terminal.First capacitor C16 is connected between section point N2 and ground terminal.Diode D is connected between section point N2 and the terminal for applying input voltage.Pass through the AC voltage outputs that converter 116 produces to first Node N1.The voltage of section point N2 is the boost voltage for obtaining input voltage boosting by converter 116.First switch Element Q16 is switched on and off in response to first control signal con16, and second switch element Q26 is in response to second control signal Con26 and switch on and off.5th switch element Q56 is switched on and off in response to the 5th control signal con56.In addition, the One switch element Q16 and second switch element Q26 are switched on and off complimentary to one anotherly.

The operation of converter 116 can refer to the operation of the converter 111 described in Fig. 8 and be readily appreciated that.In addition, such as Figure 13 It is shown, the half-bridge circuit Q16 and Q26 of both functions of function and inverter of the converter 116 including execution boost converter. That is converter 116 includes boost converter and inverter, boost converter and inverter common switching element Q16 and Q26。

5th switch element Q56 is switched on and off according to the amplitude of the input voltage inputted from input power 300.Example Such as, when the amplitude of input voltage is for reference value or less than reference value, the 5th switch element Q56 is connected.When the width of input voltage When value is more than reference value, the 5th switch element Q56 is disconnected.When the 5th switch element Q56 is disconnected, converter 116 is without liter The function of pressure converter, and only there is inverter.

Therefore, according to the embodiment of Figure 13, since the function of converter 116 is changed based on the amplitude of input voltage, because This effectively sends electric power.

Although it is not shown, the 5th switch element Q56 can also be added in the embodiment of Fig. 8, Figure 10, Figure 11 and Figure 12 Each embodiment.In addition, the diode D of Fig. 9 can also be increased to the embodiment of Figure 11 and Figure 12.In addition, according to Figure 11 and First capacitor C14 and C15 of the embodiment of Figure 12 can be with identical with the first capacitor C13 of the embodiment according to Figure 10 Mode connects.

Figure 14 is to schematically show the wireless power transmitter according to the embodiment including circuit 107 and controller 207 The diagram of the configuration of 1-7.Circuit 107 includes 117 resonator 127 of converter.Converter 117 includes switch element Q17, Q27 With Q67, first coil L17, the first capacitor C17, diode D and the 3rd capacitor C37.Resonator 127 includes the second capacitance Device C27 and the second coil L27.

Circuit 107, converter 117, resonator 127, controller 207 and input power 300 function can respectively with Fig. 7 The circuit 100 of description, converter 110, resonator 120, the function of controller 200 and input power 300 are substantially the same.In addition, The configuration and operation of resonator 127 can be identical with the configuration and operation of the resonator 121 described in Fig. 8.

First coil L17 is connected between the terminal and the 3rd node N3 that apply input voltage.3rd capacitor C37 connections Between the terminal and ground terminal of input voltage is applied.6th switch element Q67 is connected to the 3rd node N3 and ground terminal Between.Diode D is connected between the 3rd node N3 and section point N2.First capacitor C17 be connected to section point N2 and Between ground terminal.First switching element Q17 is connected between first node N1 and section point N2.Second switch element Q27 It is connected between first node N1 and ground terminal.Pass through the AC voltage outputs that converter 117 produces to first node N1.Second The voltage of node N2 is the boost voltage for obtaining input voltage boosting by converter 117.First switching element Q17 is responded Switched on and off in first control signal con17.Second switch element Q27 is connected in response to second control signal con27 And disconnection.6th switch element Q67 is switched on and off in response to the 6th control signal con67.In addition, first switching element Q17 and second switch element Q27 are switched on and off complimentary to one anotherly.

According to the embodiment of Figure 14, the duty cycle of first switching element Q17 and second switch element Q27 are fixed.Also To say, by wireless power receiver receive electric power amount by adjusting the 6th switch element Q67 duty cycle or by adjusting The operating frequency of first switching element Q17 and second switch element Q27 are adjusted.

In fig. 14, first coil L17, the 6th switch element Q67, diode D and the first capacitor C17 are operating as rising Pressure converter, first switching element Q17 and second switch element Q27 are operating as inverter.That is, converter 117 Boost converter and inverter are identical with the boost converter and inverter shown in Figure 14.

Although Figure 14 shows a case that inverter 117 includes half-bridge inverter, converter 117 may also include boosting Converter and full-bridge inverter.

Figure 15 is the diagram for the configuration for schematically showing wireless power transmitter according to the embodiment.Wireless power is sent Device 1-8 includes circuit 108 and controller 208.Circuit 108 includes 118 resonator 128 of converter.Converter 118 includes switch Element Q18, Q28, Q38 and Q48 and the 3rd capacitor C38.Resonator 128 includes the second capacitor C28 and the second coil L28.In fig.15, reference number 300 represents input power.

Circuit 108, converter 118, resonator 128, controller 208 and input power 300 function can with described in Fig. 7 Circuit 100, converter 110, resonator 120, the function of controller 200 and input power 300 be substantially the same.In addition, resonance The configuration and operation of device 128 can be identical with the configuration and operation of the resonator 121 described in Fig. 8.

First switching element Q18 is connected between first node N1 and section point N2.Second switch element Q28 is connected to Between first node N1 and ground terminal.3rd switch element Q38 is connected between section point N2 and the 3rd node N3.4th Switch element Q48 is connected between the 3rd node N3 and ground terminal.3rd capacitor C38 is connected to section point N2 and ground connection Between terminal.Voltage between first node N1 and the 3rd node N3 is the AC voltages produced by converter 118.From input electricity The input voltage that source 300 exports is applied to section point N2.First switching element Q18 in response to first control signal con18 and Switch on and off.Second switch element Q28 is switched on and off in response to second control signal con28.3rd switch element Q38 Switched on and off in response to the 3rd control signal con38.4th switch element Q48 in response to the 4th control signal con48 and Switch on and off.In addition, first switching element Q18 and second switch element Q28 are switched on and off complimentary to one anotherly, the 3rd switch Element Q38 and the 4th switch element Q48 are switched on and off complimentary to one anotherly.3rd switch element Q38 is remained off, or with Second switch element Q28 is also turned on and disconnects.4th switch element Q48 is remained turned on, or with first switching element Q18 It is also turned on and disconnects.In some instances, the 3rd switch element Q38 and the 4th switch element Q48 with second switch element Different time each time in Q28 and first switching element Q18 is respectively turned on and disconnects.

Converter 118 can only include the inverter similar to the inverter shown in Figure 15.Although Figure 15 shows conversion Device 118 includes the situation of full-bridge circuit inverter, but converter 118 may also include half-bridge inverter.

In one example, the wireless power transmitter 1 that Fig. 7 is shown into Figure 15 is sent out to 1-8 in detection pattern and electric power Send and operated under pattern.Electric power sending mode includes two or more in normal mode, boost mode and decompression mode.

Detection pattern is corresponding with simulation ping stages described above and numeral ping stages, and detection pattern is outer to determine Portion's object whether close to wireless power transmitter or just close exterior object whether be wireless power receiver pattern.

In a detection mode, wireless power transmitter, which is sent, is used to determine the whether close simulation ping of exterior object Signal and for determine just close object whether be wireless power receiver digital ping signals.In this example, as above It is described, wireless power transmitter periodically send simulation ping signals after, when wireless power transmitter 1,1-1,1-2, When 1-3,1-4,1-5,1-6,1-7 or 1-8 determine that exterior object is close, wireless power transmitter 1,1-1,1-2,1-3,1- 4th, 1-5,1-6,1-7 or 1-8 send numeral ping signals, or send numeral ping signals according to the cycle of setting.

Hereinafter, for the ease of explain, in a detection mode from wireless power transmitter 1,1-1,1-2,1-3,1-4, The simulation ping signals and numeral ping signals that 1-5,1-6,1-7 or 1-8 are sent are referred to collectively as ping signals.

Detection pattern includes such as first mode and second mode.First mode is corresponding with initial mode of operation, initially Operator scheme start from the lasting reference time section or be longer than the reference time section halted state after be used for send ping signals Operation, be such as switched to the example of on-state in the power-off of wireless power transmitter.Second mode and standby operation mould Formula is corresponding, and standby operating mode continues for less than ginseng for sending ping signals under abort state after the operation of initial pattern Examine the time.

Under initial mode of operation, converter 111,112,113,114,115,116 or 117 (Fig. 8 to Figure 14) makes input Voltage gradually boosts, and step-up power is stored in first capacitor C11, C12, C13, C14, C15, C16 or C17 (Fig. 8 is extremely In Figure 14).Converter 111,112,113,114,115,116 or 117 is eliminated by alternately by making input voltage gradually boost Ground carry out switch generation step-up power in caused predetermined ripple.

By be provided to switch element Q21, Q22 of converter 111,112,113,114,115,116 or 117, Q23, The duty cycle of the signal of Q24, Q25 (and/or Q45), Q26 or Q67 (Fig. 8 to Figure 14) little by little increases from the first duty cycle And input voltage is set gradually to boost.In one example, the duty cycle gradually increased repeats for duty cycle from specific duty cycle And continuously increase the duty cycle with reference to duty cycle.

As an example, the duty cycle that the first duty cycle and the duty cycle from 0% are increased with reference to duty cycle is corresponding.According to Embodiment, the first duty cycle are set to the duty cycle close to 0%, to prevent from continuing the reference time in abort state or be more than The input electric power rapid pressure in the stage started is operated after reference time.As a result, effectively eliminate causes in step-up power Predetermined ripple.

Make by making duty cycle continuously increase with reference to duty cycle from the first duty cycle of the duty cycle close to 0% In the operation of input voltage boosting, converter (or controller) calculate with the voltage level of step-up power that gradually boosts and with The relevant data of the corresponding duty cycle of voltage level.By converter 111,112,113,114,115,116 or 117 (or control Device 201,202,203,204,205,206 or 207 (Fig. 8 to Figure 14) processed) calculate with the voltage for the boost level gradually boosted It is horizontal and be stored in the relevant data of the corresponding duty cycle of voltage level in single memory.

In addition, when the boosting of storage in first capacitor C11, C12, C13, C14, C15, C16 or C17 (Fig. 8 to Figure 14) When the voltage level of electric power reaches the voltage level of target step-up power, converter 111,112,113,114,115,116 or 117 AC voltages (or alternating current) are exported, to be sent by resonator 121,122,123,124,125,126 or 127 (Fig. 8 to Figure 14) Ping signals.

Even in being provided by input power 300 in the example of various voltage levels, converter 111,112,113,114, 115th, 116 or 117 still make input voltage boost to target boost voltage.Therefore, change even in the voltage level of input voltage Example in, converter 111,112,113,114,115,116 or 117 still make input voltage boost to setting target boosting electricity Pressure, to reduce the dependence to input power 300.

Figure 16 is to show wireless power transmitter 1 according to the embodiment, 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1- 8 and wireless power sending method initial mode of operation flow chart.

With reference to Figure 16, under initial mode of operation, in S1110 is operated, controller 201,202,203,204,205, 206th, 207 or 208 determine current duty cycles whether be 0% duty cycle.If controller 201,202,203,204,205, 206th, 207 or 208 the duty cycles that currently set are determined as 0%, then in S1120 is operated, duty cycle is set as accounting for from 0% Empty the first duty cycle than increasing with reference to duty cycle.If controller 201,202,203,204,205,206,207 or 208 determines The duty cycle currently set is not 0%, then in S1130 is operated, step-up power and target step-up power are compared each other. If controller 201,202,203,204,205,206,207 or 208 is based on the ratio between step-up power and target step-up power Relatively determine step-up power miss the mark step-up power, then at operation S1140, duty cycle increase is referred to duty cycle, so that Step-up power gradually boosts.On the other hand, if controller 201,202,203,204,205,206,207 or 208 is based on rising Comparison between piezoelectric forces and target step-up power determines that step-up power reaches target step-up power, then, will in S1150 is operated Current duty cycle and limit duty cycle are compared each other.Limit duty cycle and the maximum duty cycle being allowed in a detection mode It is corresponding.By setting the limit duty cycle under detection pattern, the excessive power consumption for sending ping signals is prevented, and And eliminate heating problem.If controller 201,202,203,204,205,206,207 or 208 is based on current duty cycle and the limit Comparison between duty cycle determines that current duty cycle is higher than limit duty cycle, then in S1160 is operated, limit duty cycle is stored For with the corresponding ping duty cycles of target step-up power, if current duty cycle is less than limit duty cycle, operation S1170 In, current duty cycle is stored as and the corresponding ping duty cycles of target step-up power.Then, used in S1180 is operated Target step-up power sends ping signals, and initial mode of operation terminates.Then, after initial mode of operation terminates, radio Power transmitter 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 are according to wireless power receiver 2 (Fig. 1) to initial operation The response signals of the ping signals sent under pattern and enter standby operating mode or enter electric power sending mode.

Under standby operating mode, converter 111,112,113,114,115,116 or 117 (or controller 201,202, 203rd, 204,205,206,207 or 208) make duty cycle from the second duty cycle gradually increase so that input voltage boost.Converter Duty cycle is set gradually to increase from the second duty cycle, to significantly reduce the surge current caused by quick voltage changes, Therefore stand-by electric is reduced.In addition, to prevent that peak point current is input to humorous for converter 111,112,113,114,115,116 or 117 Shake device, to reduce the noise of wireless power transmitter.

Second duty cycle is determined according to the voltage level of current boost electric power.

Under standby operating mode, (Fig. 8 is into Figure 14 by first capacitor C11, C12, C13, C14, C15, C16 or C17 The step-up power of storage discharges according to the cycle for sending ping signals in each), so that the voltage level of step-up power is gradual Reduce.Second duty cycle is by considering the step-up power that stores in first capacitor C11, C12, C13, C14, C15, C16 or C17 The amount discharged according to the time interval for sending ping signals is determined.Second duty cycle can be higher than the first duty cycle.

As an example, the voltage of the step-up power stored in first capacitor C11, C12, C13, C14, C15, C16 or C17 Level is directly detected by single detecting element.It is true with the corresponding duty cycle of the voltage level detected of step-up power It is set to the second duty cycle.

In another example, according to the voltage level for the phase estimate step-up power for sending ping signals.Specifically, when When the cycle of ping signals determines, since the voltage level of step-up power is carried out according to the time interval by sending ping signals Electric discharge and reduce, therefore estimate the voltage level for the step-up power that its voltage level reduces from target step-up power part.With The corresponding duty cycle of voltage level of estimated step-up power is confirmed as the second duty cycle.

As described above, initial mode of operation with the voltage level of step-up power that gradually boosts and with passing through converter 111st, 112,113,114,115,116 or 117 (or controllers 201,202,203,204,205,206,207 or 208) calculate The relevant data of the corresponding duty cycle of voltage level be storable in single memory element.In this case, second Voltage level of the duty cycle based on the step-up power with being stored under initial mode of operation and the voltage corresponding to step-up power Horizontal relevant data of duty cycle and determine.

According to embodiment, by the way that the voltage level of target step-up power is compared with the voltage level of current boost electric power To calculate Weighted Index.By by the Weighted Index calculated be applied to the corresponding ping duty cycles of target step-up power come Calculate the second duty cycle.In this case, Weighted Index has the value more than 0 but less than 1.The embodiment can be applied to only mesh Mark the voltage level of step-up power and be stored in initially with the corresponding ping duty cycles of voltage level of target step-up power Example under operator scheme.Under initial mode of operation, whole voltage levels of step-up power and corresponding thereto multiple Ping duty cycles are not stored.That is, the only voltage level of target step-up power and ping corresponding thereto accounts for Empty ratio is stored, and therefore, reduces the size of memory.

According to another embodiment, by pair with the retrieval of the corresponding duty cycle of voltage level of current boost electric power come really Fixed second duty cycle.The embodiment can be applied under initial mode of operation store step-up power whole voltage levels and with The example of its corresponding ping duty cycle.In this example, whole voltage levels of step-up power and corresponding thereto Ping duty cycles are stored in data in the form of a lookup table, and are made a return journey under standby operating mode by using look-up table Except the workload for calculating operation.

Converter 111,112,113,114,115,116 or 117 (or controller 201,202,203,204,205,206, 207 or duty cycle 208) is set gradually to increase from the second duty cycle, so that input voltage gradually boosts.Gradually increase in duty cycle and In the case of reaching ping duty cycles, since the voltage level of the step-up power stored in the first capacitor reaches target boosting electricity The voltage level of power, therefore converter 111,112,113,114,115,116 or 117 exports AC electric currents, to pass through resonator 121st, 122,123,124,125,126 or 127 ping signals are sent.

Figure 17 is to show wireless power transmitter 1 according to the embodiment, 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1- 8 and the flow chart of operation of the wireless power sending method under standby operating mode.

With reference to Figure 17, under standby operating mode, in S1210 is operated, controller 201,202,203,204,205, 206th, 207 or 208 determine current duty cycles whether be 0% duty cycle.If it is determined that the duty cycle currently set is 0%, then In S1220 is operated, duty cycle is set as the second duty cycle.Second duty cycle is higher than the first duty cycle, as an example, passing through Weighted Index is calculated into the second duty cycle applied to ping duty cycles.In this case, Weighted Index is greater than 0 but is less than 1 value.

If the duty cycle for determining currently to set in S1210 is operated is not 0%, in S1230 is operated, will currently account for Sky ratio and the ping duty cycles for calculating and storing under initial mode of operation are compared each other.As current duty cycle and ping The result of comparative result between duty cycle, if it is determined that current duty cycle is less than ping duty cycles, then in S1240 is operated, Duty cycle increase is set to refer to duty cycle, so that step-up power gradually boosts.Alternatively, if determined in S1230 is operated current Duty cycle is higher than ping duty cycles, then in S1250 is operated, duty cycle is restricted to ping duty cycles, in operation S1260 In, ping signals are sent, and standby operating mode terminates.Then, wireless power transmitter 1,1-1,1-2,1-3,1-4,1- 5th, 1-6,1-7 or 1-8 enter electric power sending mode according to wireless power receiver 2 to the response signal of ping signals.

Figure 18 is to show wireless power transmitter 1 according to the embodiment, 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1- 8 and boost voltage of the wireless power sending method under initial mode of operation and standby operating mode change diagram.

With reference to Figure 18, under initial mode of operation, converter 110,111,112,113,114,115,116,117 or 118 (Fig. 7 to Figure 15) (or controller 200,201,202,203,204,205,206,207 or 208 (Fig. 7 to Figure 15)) makes duty cycle Gradually increase from the first duty cycle, so that input voltage gradually boosts.As converter 110,111,112,113,114,115, 116th, 117 or 118 boosting is as a result, as first capacitor C11, C12, C13, C14, C15, C16 or C17 (Fig. 8 to Figure 14) When the step-up power of middle storage reaches target step-up power, ping signals are sent in time t1.After ping signals are sent, just Beginning operator scheme terminates, and wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 enter standby behaviour Operation mode.

Under standby operating mode, the boosting stored in first capacitor C11, C12, C13, C14, C15, C16 or C17 is electric The voltage level of power reduces according to the cycle for sending ping signals.Converter 110,111,112,113,114,115,116, 117 or 118 (or controllers 200,201,202,203,204,205,206,207 or 208) in the first capacitor according to what is stored The voltage level of step-up power and duty cycle is gradually increased from the second duty cycle at time t2 so that input voltage boost, And as the boosting of converter as a result, when the step-up power stored in the first capacitor reaches target step-up power, Ping signals are sent at time t3.In this example, aforesaid operations repetition according to the sending cycle of ping signals, transmission week Phase is the time interval of time t3 to t5 or the time interval of time t5 to time t7.Then, wireless power transmitter 1,1-1, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 enter electric power according to wireless power receiver 2 to the response signal of ping signals Sending mode.

Next, electric power sending mode will be described.Hereinafter, by controller 200,201,202,203,204,205, 206th, 207 or 208 (Fig. 7 is to Figure 15's) perform the operation under electric power sending mode.

Figure 19 A to Figure 19 H are the amounts for showing the electric power according to the embodiment worked as and received by wireless power receiver 2 in electricity Wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless transmission when increasing under power sending mode The oscillogram of the operation of method.The oscillogram of Figure 19 A to Figure 19 H represents to be used to control wireless power transmitter 1,1-1,1-2,1- 3rd, the waveform of the control signal of the switch element of 1-4,1-5,1-6,1-7 or 1-8.

First control signal con11, con12, con13 and con16 of Fig. 8 to Figure 10 and Figure 13 is equal to Figure 19 A, figure Second control signal con21, con22 of the first control signal con1, Fig. 8 to Figure 10 and Figure 13 of 19C, 19E and 19G, Con23 and con26 is equal to Figure 19 B, Figure 19 D, the second control signal con2 of Figure 19 F and Figure 19 H.

In addition, first control signal con14, con15 and con18 of Figure 11, Figure 12 and Figure 15 are equal to Figure 19 A, figure Second control signal con24, con25 of the first control signal con1, Figure 11, Figure 12 and Figure 15 of 19C, Figure 19 E and Figure 19 G and Con28 is equal to Figure 19 B, Figure 19 D, the second control signal con2 of Figure 19 F and Figure 19 H.In this example, Figure 11, Tu12He The 3rd control signal con34, con35 and con38 of Figure 15 remains low level, the 4th control letter of Figure 11, Figure 12 and Figure 15 Number con44, con45 and con48 remain high level.

The control signal initially exported in the normal mode has the form of the form shown in such as Figure 19A and Figure 19B. In this example, the frequency of control signal and duty cycle are ping frequencies as described above and ping duty cycles.Figure 19 A and figure The control signal shown in 19B can also export in a detection mode.

In the normal mode, the frequency of control signal is adjusted according to from 2 received signal of wireless power receiver.Also It is to say, the example of the amount of the electric power needed for wireless power receiver 2 is less than in the amount of the electric power received as wireless power receiver 2 In, in the normal mode, controller 200,201,202,203,204,205,206,207 or 208 makes as in Figure 19 C and Figure 19 D The frequency of the control signal con1 and con2 that show reduce.Therefore, the amount increase of the electric power received by wireless power receiver 2. The frequency of the control signal con1 and con2 of Figure 19 C and Figure 19 D have the minimum value f1 (Fig. 6) of frequency in the normal mode. In the normal mode, duty cycle is fixed to above-mentioned ping duty cycles.

Under boost mode, the duty cycle of control signal is adjusted according to from 2 received signal of wireless power receiver. That is even if do not connect yet when the frequency of control signal con1 and con2 are decreased to predetermined reference frequency (for example, f1 of Fig. 6) When receiving the amount of the electric power needed for wireless power receiver, as shown in Figure 19 E and Figure 19 F, controller 200,201,202,203, 204th, 205,206,207 or 208 the frequency of control signal con1 and con2 are also fixed as reference frequency (for example, f1 of Fig. 6), And increase the duty cycle of second control signal con2.

Alternatively, as shown in Figure 19 G and Figure 19 H, under boost mode, controller 200,201,202,203,204,205, 206th, in addition 207 or 208 reduce control signal con1 and con2 frequency.In this case, duty cycle is fixed to it The duty cycle of preceding increase.

Figure 20 A to Figure 20 H are the electric power for showing to be received by wireless power receiver 2 when increase under electric power sending mode Wireless power transmitter 1 according to the embodiment, 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power hair during amount The diagram of the operation of delivery method.The oscillogram of Figure 20 A to Figure 20 H represent control wireless power transmitter 1-1,1-2,1-3,1-4, The waveform of the control signal of the switch element of 1-5,1-6,1-7 or 1-8.

First control signal con14, con15 and con18 of Figure 11, Figure 12 and Figure 15 are equal to Figure 20 A, Figure 20 C, figure Second control signal con24, con25 and con28 of the first control signal con1, Figure 11, Figure 12 and Figure 15 of 20E and Figure 20 G Be equal to Figure 20 B, Figure 20 D, Figure 20 F and Figure 20 H second control signal con2, Figure 11, Figure 12 and Figure 15 the 3rd control letter Number con34, con35 and con38 are equal to Figure 20 B, Figure 20 D, the 3rd control signal con3 of Figure 20 F and Figure 20 H, Figure 11, figure The 4th control signal con44, con45 and con48 of 12 and Figure 15 is equal to Figure 20 A, Figure 20 C, the 4th of Figure 20 E and Figure 20 G the Control signal con4.

Full-bridge electricity is operating as except Figure 20 A to Figure 20 H are related to converter 114,115 and 118 (Figure 11, Figure 12 and Figure 15) Outside the example on road, Figure 20 A to Figure 20 H are similar with Figure 19 A to Figure 19 H.

Controller 200,201,202,203,204,205,206,207 or 208 exports the control as shown in Figure 20 A and Figure 20 B Signal processed.As described above, in the normal mode, controller 200,201,202,203,204,205,206,207 or 208 also exports The control signal initially exported in the form of shown in Figure 20 A and Figure 20 B, and also output control signal in a detection mode.Figure The duty cycle of control signal con1 and con4 shown in 20A are above-mentioned ping duty cycles, and the control shown in Figure 20 A and 20B The frequency of signal con1, con2, con3 and con4 are above-mentioned ping frequencies.

In the normal mode, it is less than in the amount of the electric power received as wireless power receiver 2 needed for wireless power receiver 2 Electric power amount example in, controller 200,201,202,203,204,205,206,207 or 208 reduces such as Figure 20 C and 20D The frequency of shown control signal con1, con2, con3 and con4.

Under boost mode, the duty cycle of control signal is adjusted according to from 2 received signal of wireless power receiver. That is even if when the frequency of control signal con1, con2, con3 and con4 are reduced to preset frequency (for example, f1 of Fig. 6) When being still not received by the amount of electric power needed for wireless power receiver 2, as shown in Figure 20 E and 20F, controller 200, 201st, 202,203,204,205,206,207 or 208 the frequency of control signal con1, con2, con3 and con4 are fixed as joining Frequency (for example, f1 of Fig. 6) is examined, and increases the duty cycle of second control signal con2 and the 3rd control signal con3.

Alternatively, as shown in Figure 20 G and Figure 20 H, under boost mode, controller 200,201,202,203,204,205, 206th, the 207 or 208 further frequency for reducing control signal con1, con2, con3 and con4.In this example, duty cycle quilt It is fixed as the duty cycle increased before.

Although not shown in Figure 19 and Figure 20, under boost mode, controller 200,201,202,203,204, 205th, 206,207 or 208 can also additionally increase duty cycle after the frequency as shown in Figure 20 G and Figure 20 H is additionally reduced.

Figure 21 A to Figure 21 H are the electric power shown under electric power sending mode in response to being received by wireless power receiver 2 Amount reduces wireless power transmitter 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power hair according to the embodiment The oscillogram of the operation of delivery method.The oscillogram of Figure 21 A to Figure 21 H represents to be used to control wireless power transmitter 1-1,1-2,1- 3rd, the waveform of the control signal of the switch element of 1-4,1-5,1-6,1-7 or 1-8.

First control signal con11, con12, con13 and con16 of Fig. 8 to Figure 10 and Figure 13 is equal to Figure 21 A, figure The second control signal con21 of the first control signal con1, Fig. 8 to Figure 10 and Figure 13 of 21C, Figure 21 E and Figure 21 G, Con22, con23 and con26 are equal to Figure 21 B, Figure 21 D, the second control signal con2 of Figure 21 F and Figure 21 H.

In addition, first control signal con14, con15 and con18 of Figure 11, Figure 12 and Figure 15 are equal to Figure 21 A, figure Second control signal con24, con25 of the first control signal con1, Figure 11, Figure 12 and Figure 15 of 21C, Figure 21 E and Figure 21 G and Con28 is equal to Figure 21 B, Figure 21 D, the second control signal con2 of Figure 21 F and Figure 21 H.In this case, Figure 11, Figure 12 Low level, and the 4th of Figure 11, Figure 12 and Figure 15 are maintained at the 3rd control signal con34, con35 and con38 of Figure 15 Control signal con44, con45 and con48 are maintained at high level.

First, controller 200,201,202,203,204,205,206,207 or 208 output with Figure 21 A and Figure 21 B shown in The control signal con1 control signals identical with con2.Controller 200,201,202,203,204,205,206,207 or 208 The control signal initially exported in the form of shown in Figure 21 A and Figure 21 B is also exported in the normal mode, and also in detection pattern The lower output control signal identical with the control signal shown in Figure 21 A and Figure 21 B.

It is more than in the amount of the electric power received as wireless power receiver 2 as the amount of the electric power needed for wireless power receiver 2 Example in, in the normal mode, the increase of controller 200,201,202,203,204,205,206,207 or 208 such as Figure 21 C and The frequency of control signal con1 and con2 shown in Figure 21 D.Therefore, the amount of the electric power received by wireless power receiver 2 reduces. The frequency of the control signal con1 and con2 of Figure 21 C and Figure 21 D have the maximum f2 (Fig. 6) of frequency in the normal mode. In the normal mode, duty cycle is fixed to above-mentioned ping duty cycles.

In buck mode, according to the duty cycle from 2 received signal of wireless power receiver adjustment control signal.Also It is to say, even if when the frequency of control signal con1 and con2 increase to predetermined reference frequency (for example, f2 of Fig. 6) by radio Power receiver 2 receive electric power amount still greater than the electric power needed for wireless power receiver 2 amount, as shown in Figure 21 E and 21F, The frequency of control signal con1 and con2 are fixed as joining by controller 200,201,202,203,204,205,206,207 or 208 Frequency (for example, f2 of Fig. 6) is examined, and reduces the duty cycle of second control signal con2.

Alternatively, as shown in Figure 21 G and Figure 21 H, in buck mode, controller 200,201,202,203,204,205, 206th, the frequency of 207 or 208 further increase control signal con1 and con2.In this case, duty cycle is fixed to it The duty cycle of preceding reduction.

Figure 22 A to Figure 22 H are the electric power shown under electric power sending mode in response to being received by wireless power receiver 2 Amount reduction wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power are sent The oscillogram of the operation of method.The oscillogram of Figure 22 A to Figure 22 H represents control wireless power transmitter 1,1-2,1-3,1-4,1- 5th, the waveform of the control signal of the switch element of 1-6,1-7 or 1-8.

First control signal con14, con15 and con18 of Figure 11, Figure 12 and Figure 15 are equal to Figure 22 A, Figure 22 C, figure Second control signal con24, con25 and con28 of the first control signal con1, Figure 11, Figure 12 and Figure 15 of 22E and Figure 22 G Be equal to Figure 22 B, Figure 22 D, Figure 22 F and Figure 22 H second control signal con2, Figure 11, Figure 12 and Figure 15 the 3rd control letter Number con34, con35 and con38 are equal to Figure 22 B, Figure 22 D, the 3rd control signal con3 of Figure 22 F and Figure 22 H.Figure 11, figure The 4th control signal con44, con45 and con48 of 12 and Figure 15 is equal to Figure 22 A, Figure 22 C, the 4th of Figure 22 E and Figure 22 G the Control signal con4.

Full-bridge electricity is operating as except Figure 22 A to Figure 22 H are related to converter 114,115 and 118 (Figure 11, Figure 12 and Figure 15) Outside the example on road, Figure 22 A to Figure 22 H are similar with Figure 21 A and Figure 21 H.

First, controller 200,201,202,203,204,205,206,207 or 208 output with Figure 22 A and 22B shown in Control signal control signal con1, con2, con3 identical with con4.Controller 200,201,202,203,204,205,206, 207 or 208 also export the control signal initially exported in the form of shown in Figure 22 A and Figure 22 B in the normal mode, and are examining The control signal identical with the control signal shown in Figure 22 A and Figure 22 B is exported under survey pattern.

It is more than the amount of the electric power needed for wireless power receiver 2 in the amount of the electric power received as wireless power receiver 2 In example, in the normal mode, the increase of controller 200,201,202,203,204,205,206,207 or 208 such as Figure 22 C and The frequency of control signal con1, con2, con3 and con4 shown in 22D.Therefore, the electric power received by wireless power receiver 2 Amount reduce.The frequency of control signal con1, con2, con3 and con4 of Figure 22 C and Figure 22 D have frequency in the normal mode The maximum f2 (Fig. 6) of rate.In the normal mode, duty cycle is fixed to above-mentioned ping duty cycles.

In buck mode, according to the duty cycle from 2 received signal of wireless power receiver adjustment control signal.Also It is to say, in response to increasing to predetermined reference frequency (for example, figure even in the frequency of control signal con1, con2, con3 and con4 6 f2) when the amount of electric power that is received as wireless power receiver 2 still greater than the electric power needed for wireless power receiver 2 amount, such as Shown in Figure 22 E and Figure 22 F, controller 200,201,202,203,204,205,206,207 or 208 by control signal con1, The frequency of con2, con3 and con4 are fixed as reference frequency (for example, f2 of Fig. 6), and reduce second control signal con2 and The duty cycle of 3rd control signal con3.

Alternatively, as shown in Figure 22 G and 22H, in buck mode, controller 200,201,202,203,204,205, 206th, the frequency of 207 or 208 increase control signal con1, con2, con3 and con4.In this example, duty cycle is fixed to The duty cycle reduced before.

Figure 23 A to 23L are shown under electric power sending mode in response to the amount of the electric power received by wireless power receiver 2 Wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power are sent during reduction The oscillogram of the operation of method.The oscillogram of Figure 23 A to Figure 23 L represents control wireless power transmitter 1,1-2,1-3,1-4,1- 5th, the waveform of the control signal of the switch element of 1-6,1-7 or 1-8.

First control signal con14, con15 and con18 of Figure 11, Figure 12 and Figure 15 be equal to Figure 23 A, 23C, 23E and Second control signal con24, con25 and con28 of the first control signal con1, Figure 11, Figure 12 and Figure 15 of 23I are equal to figure The 3rd control signal con34, con35 of the second control signal con2, Figure 11, Figure 12 and Figure 15 of 23B, 23D, 23F and 23J and Con38 is equal to the 3rd control signal con3 of Figure 23 B, 23D, 23G and 23K, the 4th control signal of Figure 11, Figure 12 and Figure 15 Con44, con45 and con48 are equal to the 4th control signal con4 of Figure 23 A, 23C, 23H and 23L.

First, controller 200,201,202,203,204,205,206,207 or 208 output with Figure 23 A and 23B shown in Control signal control signal con1, con2, con3 identical with con4.Controller 200,201,202,203,204,205,206, 207 or 208 also export the control signal initially exported in the form of shown in Figure 23 A and Figure 23 B in the normal mode, and also exist The control signal identical with the control signal shown in Figure 23 A and Figure 23 B is exported under detection pattern.

It is more than the amount of the electric power needed for wireless power receiver 2 in the amount of the electric power received as wireless power receiver 2 In the case of, in the normal mode, controller 200,201,202,203,204,205,206,207 or 208 increase such as Figure 23 C and figure The frequency of control signal con1, con2, con3 and con4 shown in 23D.Therefore, the electric power received by wireless power receiver 2 Amount reduce.The frequency of control signal con1, con2, con3 and con4 of Figure 23 C and 23D have frequency in the normal mode Maximum f2 (Fig. 6).In the normal mode, duty cycle is fixed to above-mentioned ping duty cycles.

In buck mode, the duty cycle of control signal is adjusted according to from 2 received signal of wireless power receiver. That is when the frequency even in control signal con1, con2, con3 and con4 increases to predetermined reference frequency (for example, Fig. 6 F2) when the amount of electric power that is received as wireless power receiver 2 still greater than the electric power needed for wireless power receiver 2 amount, such as Figure 22 E, Figure 22 F, shown in Figure 23 G and Figure 23 H, controller 200,201,202,203,204,205,206,207 or 208 will control The frequency of signal con1, con2, con3 and con4 are fixed as reference frequency (for example, f2 of Fig. 6), fixed second control signal The duty cycle of con2, and reduce the duty cycle of the 4th control signal con4.In this case, in full-bridge circuit, dead band Time (dead time) increases, the electric power sent by wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 Amount reduce.Therefore, the amount of the electric power received by wireless power receiver 2 also reduces.

Alternatively, as shown in Figure 23 I and 23J, in buck mode, controller 200,201,202,203,204,205, 206th, 207 or 208 frequency for also increasing control signal con1, con2, con3 and con4.In this example, Figure 23 E and Figure 23 F Control signal con1 and con2 duty cycle equal to Figure 23 I and Figure 23 J control signal con1 and con2 duty cycle.Separately Outside, at the same time, as shown in Figure 23 K and Figure 23 L, the 3rd control signal con3 keeps low level, and the 4th control signal con4 is protected Hold high level.In this example, the converter 114,115 or 118 of Figure 11, Figure 12 or Figure 15 are operating as half-bridge circuit, so that The amount of the electric power sent by wireless power transmitter 1 is reduced.When therefore, compared with the example with only adjusting frequency, by radio The amount for the electric power that power receiver 2 receives further is reduced.

Although Figure 23 K and 23L show controller 200,201,202,203,204,205,206,207 or 208 by the 3rd Control signal con3 is fixed or maintained at low level, the 4th control signal con4 is maintained to the situation of high level, but the 3rd First control letters of second control signal con2s, fourth control signal con4 of the control signal con3 equal to Figure 23 J equal to Figure 23 I Number con1.That is, by increasing first control signal to whole frequencies of the 4th control signal, reduce by radio The electric power that power receiver 2 receives.

Figure 24 A to Figure 24 H are the electric power shown under electric power sending mode in response to being received by wireless power receiver 2 Wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power hair when amount reduces The oscillogram of the operation of delivery method.The oscillogram of Figure 24 A to Figure 24 H represent control wireless power transmitter 1,1-2,1-3,1-4, The waveform of the control signal of the switch element of 1-5,1-6,1-7 or 1-8.

First control signal con14, con15 and con18 of Figure 11, Figure 12 and Figure 15 are equal to Figure 24 A, 24C and 24E Second control signal con24, con25 and con28 of first control signal con1, Figure 11, Figure 12 and Figure 15 be equal to Figure 24 B, The 3rd control signal con34, con35 and con38 of second control signal con2, Figure 11, Figure 12 and Figure 15 of 24D and 24F etc. It is same as the 3rd control signal con3 of Figure 24 B, 24D and 24G, the 4th control signal con44, con45 of Figure 11, Figure 12 and Figure 15 It is equal to the 4th control signal con4 of Figure 24 A, 24C and 24H with con48.

First, controller 200,201,202,203,204,205,206,207 or 208 output with Figure 24 A and 24B shown in Control signal control signal con1, con2, con3 identical with con4.Controller 200,201,202,203,204,205,206, 207 or 208 also export the control signal initially exported in the form of shown in Figure 24 A and Figure 24 B in the normal mode, and also exist The control signal identical with the control signal shown in Figure 24 A and Figure 24 B is exported under detection pattern.

It is more than the amount of the electric power needed for wireless power receiver 2 in the amount of the electric power received as wireless power receiver 2 In the case of, in the normal mode, controller 200,201,202,203,204,205,206,207 or 208 increase such as Figure 24 C and figure The frequency of control signal con1, con2, con3 and con4 shown in 24D.Therefore, the electric power received by wireless power receiver 2 Amount reduce.The frequency of control signal con1, con2, con3 and con4 of Figure 24 C and 24D have frequency in the normal mode Maximum f2 (Fig. 6).In the normal mode, duty cycle is fixed to above-mentioned ping duty cycles.

Even if predetermined reference frequency is increased to (for example, Fig. 6 in the frequency of control signal con1, con2, con3 and con4 F2) example of the amount of the electric power received as wireless power receiver 2 still greater than the amount of the electric power needed for wireless power receiver 2 In, controller 200,201,202,203,204,205,206,207 or 208 operates in buck mode.In buck mode, such as Shown in Figure 24 E, 24F, 24G and 24H, first control of the increase of controller 200,201,202,203,204,205,206,207 or 208 The frequency of signal con1 and second control signal con2, and the 3rd control signal con3 keeps low level and the 4th control signal Con4 keeps high level.In this case, the converter 114,115 and 118 of Figure 11, Figure 12 and/or Figure 15 are operating as half Bridge circuit, so that reduce the amount of the electric power by wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 transmission, When wherein, compared with the example with only adjusting frequency, the amount of the electric power received by wireless power receiver 2 further reduces.

Figure 25 is schematically shown in wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 Or change the diagram of the process of the variable of adjustment in 1-8 and wireless power sending method.

With reference to Figure 25, in S2110 is operated, in response to the request signal inputted from wireless power receiver 2, controller 200th, the frequency for the electric power that 201,202,203,204,205,206,207 or 208 adjustment are wirelessly sent.For example, controller 200th, 201,202,203,204,205,206,207 or 208 adjust what is wirelessly sent by adjusting the frequency of control signal The frequency of electric power.That is, in the example that wireless power receiver 2 needs substantial amounts of electric power, controller 200,201, 202nd, 203,204,205,206,207 or 208 reduce frequency, and showing for a small amount of electric power is needed in wireless power receiver 2 In example, controller 200,201,202,203,204,205,206,207 or 208 increases frequency.Operating S2110 can also be in normal mode Perform under formula, and can also be performed under boost mode.

Next, in S2120 is operated, controller 200,201,202,203,204,205,206,207 or 208 determines Whether the gain at frequency adjusted is more than reference value.In this example, by determining whether adjusted frequency reaches ginseng Value is examined, controller 200,201,202,203,204,205,206,207 or 208 determines whether adjusted frequency is more than reference Value.

If as definite step in S2120 is operated as a result, controller 200,201,202,203,204,205, 206th, 207 or 208 determine that the gain at the frequency adjusted is less than reference value, then perform operation S2110.

If as definite step in S2120 is operated as a result, controller 200,201,202,203,204,205, 206th, 207 or 208 determine that the gain at the frequency adjusted is equal to or more than reference value, then control is adjusted in S2130 is operated The duty cycle of signal processed.In this example, frequency is fixed.That is, the feelings of operation S2110 are performed in the normal mode Under condition, operator scheme is changed into boost mode.

Next, after duty cycle is adjusted to limiting value, in S2140 is operated, controller 200,201, 202nd, 203,204,205,206,207 or 208 additional power request is determined whether there is.For example, even in duty cycle increase To limiting value, whether controller 200,201,202,203,204,205,206,207 or 208 determines wireless power receiver Need the amount of the electric power of bigger.

As in S2140 is operated determine step as a result, if there is additional power request, then can also operate Frequency is adjusted in S2150.Operation S2150 can be performed under boost mode.

Although Figure 25 shows the example of the amount for the electric power that increase is received by wireless power receiver 2, reduce by nothing The operation of the amount for the electric power that line power receiver 2 receives can be similarly implemented with Figure 25.

Figure 26 is schematically shown in wireless power transmitter 1 according to the embodiment, 1-1,1-2,1-3,1-4,1-5,1- 6th, the diagram of the process of the variable of adjustment is changed in 1-7 or 1-8 and wireless power sending method.

With reference to Figure 26, in S2210 is operated, in response to the request signal inputted from wireless power receiver 2, controller 200th, the duty cycle of 201,202,203,204,205,206,207 or 208 adjustment control signals.For example, received in wireless power In the case that device 2 needs substantial amounts of electric power, controller 200,201,202,203,204,205,206,207 or 208 increases duty Than, and in the case of needing a small amount of electric power in wireless power receiver 2, controller 200,201,202,203,204,205, 206th, 207 or 208 reduce duty cycle.Operation S2210 can also be performed under boost mode and decompression mode.

Next, in S2220 is operated, controller 200,201,202,203,204,205,206,207 or 208 determines to adjust Whether whole duty cycle is less than reference value.If determine that the duty cycle of adjustment is more than reference value, performs behaviour in S2220 is operated Make S2210.

If determine that the duty cycle of adjustment is equal to or less than reference value, adjusts in S2230 is operated in S2220 is operated The frequency of the electric power wirelessly sent.In this example, duty cycle is fixed to reference value.In addition, by adjusting control signal Frequency adjust the frequency of the electric power wirelessly sent.For example, reduced by increasing the frequency of control signal by radio The amount for the electric power that power receiver 2 receives.In the example of operation S2210 is performed in a boost mode, S2230 is in normal mode for operation Lower execution.

Next, in S2240 is operated, controller 200,201,202,203,204,205,206,207 or 208 determines institute Whether the frequency of adjustment exceeds term of reference.

If determine that adjusted frequency exceeds term of reference, and duty is adjusted in S2250 is operated in S2240 is operated Than.If for example, controller 200,201,202,203,204,205,206,207 or 208 determines to be adjusted in S2240 is operated Frequency be reference value or bigger, then in S2250 is operated, frequency is fixed to reference value and reduces duty cycle.With just Norm formula is performed in the example of operation S2230, and operation S2250 is performed in buck mode.Alternatively, can hold in buck mode The whole of operation shown in row Figure 23.

Although Figure 26 shows the example for the amount for reducing the electric power received by wireless power receiver 2, increase by nothing Line power receiver 2 receive electric power amount operation can by with shown in Figure 26 in the way of similar mode realize.

In Figure 27 to Figure 46 be shown respectively by controller 200,201,202,203,204,205,206,207 or 208 determine operating frequency and operate the diagram of the operation of duty cycle.Controller 200,201,202,203,204,205,206,207 Or 208 determine operating frequency and operation duty cycle using the method shown in Figure 27 to Figure 46, and use identified operation frequency The control signal of rate and operation duty cycle output control switch element.

Control information (information received from wireless power receiver 2) in each figure in Figure 27 to Figure 46 is to scheme The information included in 7 to Figure 15 request signal req, and be provided in the form of independent signal controller 200,201, 202nd, 203,204,205,206,207 or 208.

In each figure of Figure 27 to Figure 46, duty cycle downside (low side) switch element (that is, Fig. 8 in order to control is operated Second switch element Q21, Q22, Q23, Q24, Q25, Q26 and Q28 and/or the 4th switch element Q44 to Figure 13 and Figure 15, Q45 and Q48) or boost converter switch element (that is, the 6th switch element Q67 of Figure 14) control signal duty cycle. Therefore, control high side (high side) switch element (that is, first switching element Q11, Q12 of Fig. 8 to Figure 13 and Figure 15, Q13, Q14, Q15, Q16 and Q18 and/or the 3rd switch element Q34, Q35 and Q38) control signal in each duty cycle can be with It is 100%-operation duty cycle d_c.

In addition, in each figure of Figure 27 to Figure 46, operating frequency is switch element (that is, the Fig. 8 for performing inverter function To switch element Q11, Q21 of Figure 15, Q12, Q22, Q13, Q23, Q14, Q24, Q34, Q44, Q15, Q25, Q35, Q45, Q16, Q26, Q17, Q27, Q18, Q28, Q38 and Q48) at least one operating frequency.

In Figure 27 into Figure 46, pass through the side with setting the first reference frequency f1 and the second reference frequency f2 shown in Fig. 6 Identical method setting the first reference frequency f1 and the second reference frequency f2 of method.Furthermore it is also possible to setting the first reference frequency F1 and the second reference frequency f2 similarly sets first with reference to duty cycle d1 and second with reference to duty cycle d2.For example, pass through consideration Electric power transmitting efficiency, wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power receiver 2 Element characteristic, standard or other agreements (account for determine first with reference to duty cycle d1 to be adjustable under the first decompression mode The lower limit of empty ratio).By consider electric power transmitting efficiency, wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and the element characteristic of wireless power receiver 2, the degree of heat, standard or other agreements determine that second refers to duty cycle D2 (for the upper limit value of the adjustable duty cycle under the first boost mode).In one example, the second reference frequency f2 is more than First reference frequency f1, second is more than first with reference to duty cycle d1 with reference to duty cycle d2.In addition, in this example, first with reference to frequency Rate f1 is greater than or equal to ping frequencies f_p less than or equal to ping frequencies f_p, the second reference frequency f2.First refers to duty cycle D1 is less than or equal to ping duty cycles d_p, and second is greater than or equal to ping duty cycles d_p with reference to duty cycle d2.In addition, the first ginseng Examine resonance frequencies of the frequency f1 more than the resonator 120,121,122,123,124,125,126,127 or 128 in Fig. 7 to Figure 15 Rate.

Figure 27 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 or The flow chart of operation of person's wireless power sending method under electric power sending mode.

First, in S3101 is operated, controller 200,201,202,203,204,205,206,207 or 208 will operate frequency Rate f_c is set as ping frequency f_p, and operation duty cycle d_c is set as ping duty cycles d_p.Hold in a detection mode Row operation S3101.

Next, in S3201 is operated, controller 200,201,202,203,204,205,206,207 or 208 be based on from The control information that wireless power receiver 2 receives calculates operating frequency f_c.In this example, operation duty cycle d_c is fixed to Ping duty cycles d_p.Control information is connect by the amount and wireless power receiver 2 with the electric power needed for wireless power receiver 2 Poor related information between the amount of the electric power of receipts.

Next, in S3301 is operated, controller 200,201,202,203,204,205,206,207 or 208 determines institute Whether the operating frequency f_c of calculating is more than the first reference frequency f1.

If determine that calculated operating frequency f_c is more than the first reference frequency f1, is operating in S3301 is operated In 3701, controller 200,201,202,203,204,205,206,207 or 208 uses calculated operating frequency f_c and behaviour Make duty cycle d_c and produce control signal, and control signal caused by output.

If determine that operating frequency f_c is less than or equal to the first reference frequency f1, is operating in S3301 is operated In S3401, operating frequency f_c is set as the first reference by controller 200,201,202,203,204,205,206,207 or 208 Frequency f1, and operation duty cycle d_c is calculated based on control information.

After operation S3401 is performed, in S3701 is operated, controller 200,201,202,203,204,205,206,207 Or 208 use calculated operating frequency f_c and operation duty cycle d_c to produce control signal, and control caused by exporting Signal.

Figure 28 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of the change of operating frequency of the wireless power sending method under electric power sending mode and operation duty cycle.

With reference to Figure 28, under normal mode n, in response to the control information received from wireless power receiver 2, controller 200th, 201,202,203,204,205,206,207 or 208 adjusted by varying operating frequency f_c by wireless power receiver The amount of 2 electric power received.In this example, operation duty cycle d_c is fixed to ping duty cycles d_p.Under normal mode n, Operating frequency f_c changes in the range of the first reference frequency f1 to the second reference frequency f2.

When being received in the example for being decreased to the first reference frequency f1 even in operating frequency f_c by wireless power receiver 2 Electric power amount still less than the electric power needed for wireless power receiver 2 amount when, controller 200,201,202,203,204, 205th, 206,207 or 208 operator scheme changes into the first boost mode h1, and operating frequency f_c is being fixed as first After reference frequency f1, the adjustment operation duty cycle of controller 200,201,202,203,204,205,206,207 or 208 d_c. Under one boost mode h1, operation duty cycle d_c changes in the range of ping duty cycles d_p to second is with reference to duty cycle d2.

Hereinafter with reference to the operation of amount (that is, load capacity) description Figure 28 of the electric power needed for wireless power receiver 2.

With reference to Figure 28, be less than the first reference load amount R11 in response to load capacity, controller 200,201,202,203,204, 205th, 206,207 or 208 operated under normal mode n.Under normal mode n, controller 200,201,202,203,204, 205th, 206,207 or 208 operation duty cycle d_c is fixed as ping duty cycle d_p, and changes operating frequency f_c.In normal mode Under formula, operating frequency f_c changes in the range of the first reference frequency f1 to the second reference frequency f2.

If load capacity is more than the first reference load amount R11, controller 200,201,202,203,204,205,206, 207 or 208 operate under the first boost mode h1.Under the first boost mode h1, controller 200,201,202,203,204, 205th, 206,207 or 208 operating frequency f_c is fixed as the first reference frequency f1, and changes operation duty cycle d_c.First Under boost mode h1, controller 200,201,202,203,204,205,206,207 or 208 makes operation duty cycle d_c in ping Duty cycle d_p is to changing in the range of the second duty cycle.

Figure 29 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of operation of the wireless power sending method under electric power sending mode.

In S3102 is operated, controller 200,201,202,203,204,205,206,207 or 208 is by operating frequency f_c It is set as ping frequency f_p, and operation duty cycle d_c is set as ping duty cycles d_p.Behaviour can be performed in a detection mode Make S3102.

In S3202 is operated, controller 200,201,202,203,204,205,206,207 or 208 is based on from radio The control information that power receiver 2 receives calculates operating frequency f_c.In this example, operation duty cycle d_c is fixed to ping and accounts for Sky compares d_p.The electricity that control information is received for the amount and wireless power receiver 2 with the electric power needed for wireless power receiver 2 Poor related information between the amount of power.

In S3502 is operated, controller 200,201,202,203,204,205,206,207 or 208 determines what is calculated Whether operating frequency f_c is less than the second reference frequency f2.

If determine that calculated operating frequency f_c is less than the second reference frequency f2, is operating in S3502 is operated In 3702, controller 200,201,202,203,204,205,206,207 or 208 uses calculated operating frequency f_c and behaviour Make duty cycle d_c and produce control signal, and control signal caused by output.

Alternatively, if determining that operating frequency f_c is greater than or equal to the second reference frequency f2 in S3502 is operated, Operate in S3602, operating frequency f_c is set as second by controller 200,201,202,203,204,205,206,207 or 208 Reference frequency f2, and operation duty cycle d_c is calculated based on control information.

In S3702 is operated, controller 200,201,202,203,204,205,206,207 or 208 uses what is calculated Operating frequency f_c and operation duty cycle d_c produce control signal, and control signal caused by output.

Figure 30 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of the change of operating frequency of the wireless power sending method under electric power sending mode and operation duty cycle.

With reference to Figure 30, under normal mode n, in response to the control information received from wireless power receiver 2, controller 200th, 201,202,203,204,205,206,207 or 208 adjusted by varying operating frequency f_c by wireless power receiver The amount of 2 electric power received.In this example, operation duty cycle d_c is fixed to ping duty cycles d_p.

In response in the example that operating frequency f_c increases to the second reference frequency f2 by wireless power receiver 2 The amount of the electric power of reception still greater than the electric power needed for wireless power receiver 2 amount, controller 200,201,202,203,204, 205th, 206,207 or 208 operator scheme changes into the first decompression mode I1, and operating frequency f_c is being fixed as second After reference frequency f2, the adjustment operation duty cycle of controller 200,201,202,203,204,205,206,207 or 208 d_c.

Hereinafter with reference to the operation of amount (that is, load capacity) description Figure 30 of the electric power needed for wireless power receiver 2.

With reference to Figure 30, be more than the second reference load amount R22 in response to load capacity, controller 200,201,202,203,204, 205th, 206,207 or 208 operated under normal mode n.Under normal mode n, controller 200,201,202,203,204, 205th, 206,207 or 208 operation duty cycle d_c is fixed as ping duty cycle d_p, and changes operating frequency f_c.In normal mode Under formula, operating frequency f_c changes in the range of the first reference frequency f1 to the second reference frequency f2.

Be less than the second reference load amount R22 in response to load capacity, controller 200,201,202,203,204,205,206, 207 or 208 operate under the first decompression mode I1.Under the first decompression mode I1, controller 200,201,202,203,204, 205th, 206,207 or 208 operating frequency is fixed as the second reference frequency f2, and changes operation duty cycle d_c.In the first decompression Under pattern I1, controller 200,201,202,203,204,205,206,207 or 208 makes operation duty cycle d_c in ping duties Than changing in the range of the reference duty cycles of d_p to first d1.

Figure 31 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The flow chart of operation of the wireless power sending method under electric power sending mode.

In S3103 is operated, controller 200,201,202,203,204,205,206,207 or 208 is by operating frequency f_c It is set as ping frequency f_p, and operation duty cycle d_c is set as ping duty cycles d_p.Behaviour can be performed in a detection mode Make S3103.

In S3203 is operated, controller 200,201,202,203,204,205,206,207 or 208 is based on from radio The control information that power receiver 2 receives calculates operating frequency f_c.In this example, operation duty cycle d_c is fixed to ping and accounts for Sky compares d_p.The electricity that control information is received for the amount and wireless power receiver 2 with the electric power needed for wireless power receiver 2 Poor related information between the amount of power.

In S3303 is operated, controller 200,201,202,203,204,205,206,207 or 208 determines what is calculated Whether operating frequency f_c is more than the first reference frequency f1.

If determine that operating frequency f_c is less than or equal to the first reference frequency f1 in S3303 is operated, in operation 3403 In, operating frequency f_c is set as the first reference frequency by controller 200,201,202,203,204,205,206,207 or 208 F1, and operation duty cycle d_c is calculated based on control information.

In operation 3703, controller 200,201,202,203,204,205,206,207 or 208 uses calculated behaviour Working frequency f_c and operation duty cycle d_c produce control signal, and control signal caused by output.

Alternatively, if determining that calculated operating frequency f_c is more than the first reference frequency f1 in operation 3303, In operation 3503, controller 200,201,202,203,204,205,206,207 or 208 determines calculated operating frequency f_c Whether the second reference frequency f2 is less than.

If determine that calculated operating frequency f_c is less than the second reference frequency f2 in S3503 is operated, that is to say, that It is the value between the first reference frequency f1 and the second reference frequency f2 in the operating frequency f_c calculated in operating S3203, then exists In operation 3703, controller 200,201,202,203,204,205,206,207 or 208 uses calculated operating frequency f_c Control signal, and control signal caused by output are produced with operation duty cycle d_c.

Alternatively, if determining that operating frequency f_c is greater than or equal to the second reference frequency f2, grasps in S3503 is operated In making 3603, operating frequency f_c is set as the second ginseng by controller 200,201,202,203,204,205,206,207 or 208 Frequency f2 is examined, and operation duty cycle d_c is calculated based on control information.

In S3703 is operated, controller 200,201,202,203,204,205,206,207 or 208 uses what is calculated Operating frequency f_c and operation duty cycle d_c produce control signal, and control signal caused by output.

Figure 32 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of the change of operating frequency of the wireless power sending method under electric power sending mode and operation duty cycle.

With reference to Figure 32, under normal mode n, in response to the control information received from wireless power receiver 2, controller 200th, 201,202,203,204,205,206,207 or 208 adjusted by varying operating frequency f_c by wireless power receiver The amount of 2 electric power received.In this illustration, operation duty cycle d_c can be fixed to ping duty cycles d_p.

When being received in the example for being decreased to the first reference frequency f1 even in operating frequency f_c by wireless power receiver 2 Electric power amount still less than the electric power needed for wireless power receiver 2 amount when, controller 200,201,202,203,204, 205th, 206,207 or 208 operator scheme changes into the first boost mode h1, and operating frequency f_c is being fixed as first After reference frequency f1, the adjustment operation duty cycle of controller 200,201,202,203,204,205,206,207 or 208 d_c.

In response in the example that operating frequency f_c increases to the second reference frequency f2 by wireless power receiver 2 The amount of the electric power of reception still greater than the electric power needed for wireless power receiver 2 amount, controller 200,201,202,203,204, 205th, 206,207 or 208 operator scheme changes into the first decompression mode I1, and operating frequency f_c is being fixed as second After reference frequency f2, the adjustment operation duty cycle of controller 200,201,202,203,204,205,206,207 or 208 d_c.

Hereinafter with reference to the operation of amount (that is, load capacity) description Figure 32 of the electric power needed for wireless power receiver 2.

If load capacity is less than the first reference load amount R13 and is more than the second reference load amount R23, controller 200, 201st, 202,203,204,205,206,207 or 208 operated under normal mode n.Under normal mode n, controller 200, 201st, 202,203,204,205,206,207 or 208 operation duty cycle d_c is fixed as ping duty cycle d_p, and changes operation Frequency f_c.In the normal mode, operating frequency f_c changes in the range of the first reference frequency f1 to the second reference frequency f2.

If load capacity is more than the first reference load amount R13, controller 200,201,202,203,204,205,206, 207 or 208 operate under the first boost mode h1.Under the first boost mode h1, controller 200,201,202,203,204, 205th, 206,207 or 208 operating frequency f_c is fixed as the first reference frequency f1, and changes operation duty cycle d_c.First Under boost mode h1, controller 200,201,202,203,204,205,206,207 or 208 makes operation duty cycle d_c in ping Change in the range of the reference duty cycles of duty cycle d_p to second d2.

If load capacity is less than the second reference load amount R23, controller 200,201,202,203,204,205,206, 207 or 208 operate under the first decompression mode I1.Under the first decompression mode I1, controller 200,201,202,203,204, 205th, 206,207 or 208 operating frequency f_c is fixed as the second reference frequency f2, and changes operation duty cycle d_c.First Under decompression mode I1, controller 200,201,202,203,204,205,206,207 or 208 makes operation duty cycle d_c in ping Change in the range of the reference duty cycles of duty cycle d_p to first d1.

Figure 33 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The flow chart of operation of the wireless power sending method under electric power sending mode.

With reference to Figure 33, first, in S3104 is operated, controller 200,201,202,203,204,205,206,207 or Operating frequency f_c is set as ping frequency f_p by 208, and operation duty cycle d_c is set as ping duty cycles d_p.Can be Operation S3104 is performed under detection pattern.

Next, in S3204 is operated, controller 200,201,202,203,204,205,206,207 or 208 be based on from The control information that wireless power receiver 2 receives calculates operating frequency f_c.In this example, operation duty cycle d_c is fixed to Ping duty cycles d_p.Control information is connect by the amount and wireless power receiver 2 with the electric power needed for wireless power receiver 2 Poor related information between the amount of the electric power of receipts.

In S3304 is operated, controller 200,201,202,203,204,205,206,207 or 208 determines what is calculated Whether operating frequency f_c is more than the first reference frequency f1.

If determining that calculated operating frequency f_c is less than or equal to the first reference frequency f1 in S3304 is operated, In operation 3404, operating frequency f_c is set as first by controller 200,201,202,203,204,205,206,207 or 208 Reference frequency f1, and operation duty cycle d_c is calculated based on control information.

In S3424 is operated, controller 200,201,202,203,204,205,206,207 or 208 determines what is calculated Operate whether duty cycle d_c is more than second with reference to duty cycle d2.

If determining that calculated operation duty cycle d_c is less than or equal to second and refers to duty cycle d2 in S3424 is operated, Then in S3704 is operated, controller 200,201,202,203,204,205,206,207 or 208 uses calculated operation frequency Rate f_c and operation duty cycle d_c produce control signal, and control signal caused by output.

Alternatively, if determining that calculated operation duty cycle d_c refers to duty cycle more than second in S3424 is operated D2, then in S3444 is operated, controller 200,201,202,203,204,205,206,207 or 208 will operate duty cycle d_c It is fixed as second and refers to duty cycle, and operating frequency f_c is calculated based on control information again.

After operation S3444 is performed, in operation 3704, controller 200,201,202,203,204,205,206,207 Or 208 use calculated operating frequency f_c and operation duty cycle d_c to produce control signal, and control caused by exporting Signal.

If determine that calculated operating frequency f_c is more than the first reference frequency f1, is operating in operation 3304 In 3504, whether controller 200,201,202,203,204,205,206,207 or 208 determines calculated operating frequency f_c Less than the second reference frequency f2.

If determine that calculated operating frequency f_c is less than the second reference frequency f2 in operation 3504, that is to say, that The operating frequency f_c calculated in operation 3204 is the value between the first reference frequency f1 and the second reference frequency f2, then is grasping Make 3704 in, controller 200,201,202,203,204,205,206,207 or 208 use calculated operating frequency f_c and Operate duty cycle d_c and produce control signal, and control signal caused by output.

If determine that operating frequency f_c is greater than or equal to the second reference frequency f2 in operation 3504, in operation 3604 In, operating frequency f_c is set as the second reference frequency by controller 200,201,202,203,204,205,206,207 or 208 F2, and operation duty cycle d_c is calculated based on control information.

After operation S3604 is performed, in operation 3704, controller 200,201,202,203,204,205,206,207 Or 208 use calculated operating frequency f_c and operation duty cycle d_c to produce control signal, and control caused by exporting Signal.

Figure 34 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of the change of operating frequency of the wireless power sending method under electric power sending mode and operation duty cycle.

Under normal mode n, in response to the control information received from wireless power receiver 2, controller 200,201, 202nd, 203,204,205,206,207 or 208 adjust what is received by wireless power receiver 2 by varying operating frequency f_c The amount of electric power.In this example, operation duty cycle d_c is fixed to ping duty cycles d_p.Under normal mode n, operating frequency F_c changes in the range of the first reference frequency f1 to the second reference frequency f2.

In response in the example that operating frequency f_c is decreased to the first reference frequency f1 by wireless power receiver 2 The amount of the electric power of reception still less than the electric power needed for wireless power receiver 2 amount, controller 200,201,202,203,204, 205th, 206,207 or 208 operator scheme changes into the first boost mode h1, and operating frequency f_c is being fixed as first After reference frequency f1, the adjustment operation duty cycle of controller 200,201,202,203,204,205,206,207 or 208 d_c. One boost mode h1, operation duty cycle d_c change in the range of ping duty cycles d_p to second is with reference to duty cycle d2.

The nothing in the case of duty cycle d_c is operated under the first boost mode h1 and increases to second with reference to duty cycle d2 Line power receiver 2 receive electric power amount still less than the electric power needed for wireless power receiver 2 amount when, controller 200, 201st, 202,203,204,205,206,207 or 208 operator scheme changes into the second boost mode h2, and controller 200, 201st, 202,203,204,205,206,207 or 208 connect by varying operating frequency f_c to adjust wireless power receiver 2 The amount of the electric power of receipts.Under the second boost mode h2, operation duty cycle d_c can be fixed to second with reference to duty cycle d2. Under two boost mode h2, operating frequency f_c changes in the range of the first reference frequency f1 to minimum frequency f_min.

In the normal mode, when in the example for increasing to the second reference frequency f2 even in operating frequency f_c by radio Power receiver 2 receive electric power amount still greater than the electric power needed for wireless power receiver 2 amount when, controller 200,201, 202nd, 203,204,205,206,207 or 208 operator scheme changes into the first decompression mode I1, and by operating frequency f_ After c is fixed as the second reference frequency f2, controller 200,201,202,203,204,205,206,207 or 208 adjusts operation and accounts for Sky compares d_c.Under the first decompression mode I1, operation duty cycle d_c can first with reference to duty cycle d1 to ping duty cycles d_p it Between in the range of change.

Hereinafter with reference to the operation of amount (that is, load capacity) description Figure 34 of the electric power needed for wireless power receiver 2.

If load capacity is less than the first reference load amount R14 and is more than the second reference load amount R24, controller 200, 201st, 202,203,204,205,206,207 or 208 operated under normal mode n.If load capacity is more than the first reference load Measure R14 and be less than the 3rd reference load amount R34, then controller 200,201,202,203,204,205,206,207 or 208 exists Operated under first boost mode h1.If load capacity is less than the second reference load amount R24, controller 200,201,202,203, 204th, 205,206,207 or 208 operated under the first decompression mode I1.In the first decompression mode I1, normal mode n and first liter Operation under die pressing type h1 is identical with the description as described in Figure 32.

If load capacity is more than the 3rd reference load amount R34, controller 200,201,202,203,204,205,206, 207 or 208 operate under the second boost mode h2.Under the second boost mode h2, controller 200,201,202,203,204, 205th, 206,207 or 208 operation duty cycle d_c is fixed as second with reference to duty cycle d2, and changes operating frequency f_c. Under second boost mode h2, operating frequency changes in the first reference frequency f1 between minimum frequency f_min.

Figure 35 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The flow chart of operation of the wireless power sending method under electric power sending mode.

Operate S3105, S3205, S3305, S3405, S3425, S3445, S3505, S3605 and S3705 respectively with Figure 33 Described in operation S3104, S3204, S3304, S3404, S3424, S3444, S3504, S3604 it is identical with S3704.

After operating frequency f_c is calculated in operating S3445, in S3465 is operated, controller 200,201,202,203, 204th, 205,206,207 or 208 determine whether operating frequency f_c is less than minimum frequency f_min.

If the operating frequency f_c calculated in operation S3445 is determined in operating S3465 is greater than or equal to minimum frequency f_ Min, then in operation 3705, controller 200,201,202,203,204,205,206,207 or 208 uses calculated operation Frequency f_c and operation duty cycle d_c produce control signal, and control signal caused by output.

Alternatively, if the operating frequency f_c calculated in operation S3445 is determined in operating S3465 is less than minimum frequency F_min, then in S3485 is operated, controller 200,201,202,203,204,205,206,207 or 208 is by operating frequency f_c It is set as minimum frequency f_min, and operation duty cycle d_c is calculated based on control information.In S3485 is operated, duty is operated It is more than second with reference to duty cycle d2 than d_c.For example, operation duty cycle d_c has the value of 50% or bigger.

After operation S3485 is performed, in S3705 is operated, controller 200,201,202,203,204,205,206,207 Or 208 use calculated operating frequency f_c and operation duty cycle d_c to produce control signal, and control caused by exporting Signal.

Figure 36 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of the change of operating frequency of the wireless power sending method under electric power sending mode and operation duty cycle.

In Figure 36, under the first decompression mode I1, normal mode n, the first boost mode h1 and the second boost mode h2 Operation and the first decompression mode I1, normal mode n, the first boost mode h1 and the second boost mode h2 described in Figure 34 Under operation it is identical.

With reference to Figure 36, in the second boost mode h2, when being decreased to minimum frequency f_min's even in operating frequency f_c In example wireless power receiver 2 receive electric power amount still less than the electric power needed for wireless power receiver 2 amount when, control The operator scheme of device 200,201,202,203,204,205,206,207 or 208 changes into the 3rd boost mode h3.At the 3rd liter In die pressing type h3, operating frequency f_c is fixed as minimum by controller 200,201,202,203,204,205,206,207 or 208 Frequency f_min, and increase operation duty cycle d_c.Under the 3rd boost mode h3, operation duty cycle d_c has the second reference The value of duty cycle d2 or bigger.For example, under the 3rd boost mode h3, operation duty cycle d_c refers to duty cycle d2 extremely second Adjusted between maximum duty cycle d_max.Second can be passed through with reference to duty cycle d2 and maximum duty cycle d_max by user Consider the limitation according to standard and other agreements or wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 Use environment set.

That is, if load capacity is more than the 5th reference load amount R55, controller 200,201,202,203,204, 205th, 206,207 or 208 operated under the 3rd boost mode h3.

Figure 37 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The flow chart of operation of the wireless power sending method under electric power sending mode.

In Figure 37, S3106, S3206, S3306, S3406, S3506, S3606 and S3706 in Figure 31 respectively with retouching for operation Operation S3103, S3203, S3303, S3403, S3503, the S3603 stated is identical with S3703.

After operation duty cycle d_c is calculated in operating S3606, in S3626 is operated, controller 200,201,202,203, 204th, 205,206,207 or 208 determine whether calculated operation duty cycle d_c is less than first with reference to duty cycle d1.

If determining that operation duty cycle d_c is greater than or equal to first and refers to duty cycle d1 in S3626 is operated, operating In 3706, controller 200,201,202,203,204,205,206,207 or 208 is using operating frequency f_c and in operation S3606 The operation duty cycle d_c of middle calculating produces control signal, and control signal caused by output.

Alternatively, if determining that operation duty cycle d_c is less than first and refers to duty cycle d1 in S3626 is operated, grasping In making 3646, controller 200,201,202,203,204,205,206,207 or 208 is fixed as first by duty cycle d_c is operated Operating frequency f_c is calculated with reference to duty cycle d1, and based on control information.

Perform operate S3646, in S3706 is operated, controller 200,201,202,203,204,205,206,207 or 208 use calculated operating frequency f_c and operation duty cycle d_c to produce control signal, and export caused control letter Number.

Figure 38 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of the change of operating frequency of the wireless power sending method under electric power sending mode and operation duty cycle.

Described in reference Figure 38, the operation of the first decompression mode I1, normal mode n and the first boost mode h1 and Figure 32 The operation of first decompression mode I1, normal mode n and the first boost mode h1 are identical.

Under the first decompression mode I1, in response to being decreased to first with reference to duty cycle d1's even in operation duty cycle d_c The amount of the electric power received in example as wireless power receiver 2 is still greater than the amount of the electric power needed for wireless power receiver 2, control The operator scheme of device 200,201,202,203,204,205,206,207 or 208 changes into the second decompression mode I2.In the second drop In die pressing type I2, controller 200,201,202,203,204,205,206,207 or 208 will operate duty cycle d_c and be fixed as the One refers to duty cycle d1, and changes operating frequency f_c.In the second decompression mode I2, operating frequency f_c is in the second reference frequency Change in the range of f2 to peak frequency f_max.

That is, be less than the 4th reference load amount R46 in response to load capacity, then controller 200,201,202,203, 204th, 205,206,207 or 208 operated under the second decompression mode I2.

Figure 39 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The flow chart of operation of the wireless power sending method under electric power sending mode.

In Figure 39, S3107, S3207, S3307, S3407, S3507, S3607 and S3707 in Figure 31 respectively with retouching for operation Operation S3103, S3203, S3303, S3403, S3503, the S3603 stated is identical with S3703.

With reference to Figure 39, after operation duty cycle d_c is calculated in operation 3407, in operation 3427, controller 200,201, 202nd, 203,204,205,206,207 or 208 determine whether calculated operation duty cycle d_c more than second refer to duty cycle d2。

If determining that calculated operation duty cycle d_c is less than or equal to second and refers to duty cycle d2 in S3427 is operated, Then operation 3707 in, controller 200,201,202,203,204,205,206,207 or 208 using operating frequency f_c and The operation duty cycle d_c calculated in operation 3407 produces control signal, and control signal caused by output.

Alternatively, if determining that calculated operation duty cycle d_c refers to duty cycle more than second in S3427 is operated D2, then in S3447 is operated, controller 200,201,202,203,204,205,206,207 or 208 will operate duty cycle d_c It is fixed as second and refers to duty cycle, and operating frequency f_c is calculated based on control information again.

After operation S3447 is performed, in S3707 is operated, controller 200,201,202,203,204,205,206,207 Or 208 use calculated operating frequency f_c and operation duty cycle d_c to produce control signal, and control letter caused by exporting Number.

After operation duty cycle d_c is calculated in operating S3607, in operation 3627, controller 200,201,202,203, 204th, 205,206,207 or 208 determine whether calculated operation duty cycle d_c is less than first with reference to duty cycle d1.

If determining that calculated operation duty cycle d_c is greater than or equal to first and refers to duty cycle d1 in S3627 is operated, Then operation 3707 in, controller 200,201,202,203,204,205,206,207 or 208 using operating frequency f_c and The operation duty cycle d_c calculated in operation 3607 produces control signal, and control signal caused by output.

Alternatively, if determining that calculated operation duty cycle d_c refers to duty cycle less than first in S3627 is operated D1, then in S3647 is operated, controller 200,201,202,203,204,205,206,207 or 208 will operate duty cycle d_c It is fixed as first and refers to duty cycle d1, and operating frequency f_c is calculated based on control information.

After operation S3647 is performed, in S3707 is operated, controller 200,201,202,203,204,205,206,207 Or 208 use calculated operating frequency f_c and operation duty cycle d_c to produce control signal, and control letter caused by exporting Number.

Figure 40 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of the change of operating frequency of the wireless power sending method under electric power sending mode and operation duty cycle.

In Figure 40, operation under the first decompression mode I1, normal mode n and the first boost mode h1 with Figure 32 Operation under the first decompression mode I1, the normal mode n and the first boost mode h1 of description is identical.

With reference to Figure 40, under the first decompression mode I1, accounted in response to being decreased to the first reference even in operation duty cycle d_c The amount for the electric power that wireless power receiver 2 receives is still greater than the electric power needed for wireless power receiver 2 in the empty example than d1 Amount, the operator scheme of controller 200,201,202,203,204,205,206,207 or 208 change into the second decompression mode I2. In the second decompression mode I2, controller 200,201,202,203,204,205,206,207 or 208 will operate duty cycle d_c It is fixed as first and refers to duty cycle d1, and changes operating frequency f_c.In the second decompression mode I2, operating frequency f_c is second Change in the range of reference frequency f2 to peak frequency f_max.

That is, if load capacity is less than the 4th reference load amount R47, controller 200,201,202,203,204, 205th, 206,207 or 208 operated under the second decompression mode I2.

Under the first boost mode h1, when the example that the second reference duty cycle d2 is increased to even in operation duty cycle d_c The amount for the electric power that middle wireless power receiver 2 receives still less than the electric power needed for wireless power receiver 2 amount when, controller 200th, 201,202,203,204,205,206,207 or 208 operator scheme changes into the second boost mode h2, and controller 200th, 201,202,203,204,205,206,207 or 208 connect by varying operating frequency f_c adjustment wireless power receiver 2 The amount of the electric power of receipts.In the second boost mode h2, operation duty cycle d_c is fixed to second with reference to duty cycle d2.Second In boost mode h2, operating frequency f_c changes in the range of the first reference frequency f1 to minimum frequency f_min.

That is, be more than the 3rd reference load amount R37 in response to load capacity, controller 200,201,202,203,204, 205th, 206,207 or 208 operated under the second boost mode h2.

Figure 41 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The flow chart of operation of the wireless power sending method under electric power sending mode.

In Figure 41, operation S3108, S3208, S3308, S3408, S3428, S3448, S3508 and S3708 respectively with figure Operation S3104, S3204, S3304, S3404, S3424, S3444, S3504 described in 33 is identical with S3704.

In response to being greater than or equal to the second ginseng in the operating frequency f_c for determining to calculate in S3208 is operated in operating S3508 Frequency f2 is examined, in operation 3608, controller 200,201,202,203,204,205,206,207 or 208 is by operating frequency f_c Be set as the second reference frequency f2, by the operation duty cycle d_c1 of the first branch (that is, second control signal con24, con25 and The duty cycle of con28 (Figure 11,12 and 15)) ping duty cycle d_p are fixed as, and calculate the operation duty of the second branch Than d_c2 (that is, the duty cycle of the 4th control signal con44, con45 and con48 (Figure 11,12 and 15)).

After operation S3608 is performed, in S3708 is operated, controller 200,201,202,203,204,205,206,207 Or 208 use calculated operating frequency and operation duty cycle d_c1 and d_c2 to produce control signal, and control caused by exporting Signal processed.

Figure 42 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of the change of operating frequency of the wireless power sending method under electric power sending mode and operation duty cycle.

In Figure 42, operation under normal mode n, the first boost mode h1 and the second boost mode h2 with Figure 32 Operation under the normal mode n of description, the first boost mode h1 and the second boost mode h2 is identical.

With reference to Figure 42, under normal mode n, when the example that the second reference frequency f2 is increased to even in operating frequency f_c The amount for the electric power that middle wireless power receiver 2 receives still greater than the electric power needed for wireless power receiver 2 amount when, controller 200th, 201,202,203,204,205,206,207 or 208 operator scheme changes into the 3rd decompression mode I3.In the 3rd decompression In pattern I3, operating frequency f_c is fixed as the second ginseng by controller 200,201,202,203,204,205,206,207 or 208 Frequency f2 is examined, by operation duty cycle d_c1 (that is, second control signal con24, con25 and con28 (Figure 11,12 of the first branch With duty cycle 15)) ping duty cycle d_p are fixed as, and adjust the operation duty cycle d_c2 the (that is, the 4th of the second branch The duty cycle of control signal con44, con45 and con48 (Figure 11,12 and 15)).Under the 3rd decompression mode I3, second The operation duty cycle d_c2 of branch changes in the range of ping duty cycles d_p to (100%-ping duty cycle d_p).

That is, be less than the second reference load amount R28 in response to load capacity, controller 200,201,202,203,204, 205th, 206,207 or 208 operated under the 3rd decompression mode I3.

Figure 43 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The flow chart of operation of the wireless power sending method under electric power sending mode.

In Figure 43, operation S3109, S3209, S3309, S3409, S3429, S3449, S3509 and S3709 respectively with figure Operation S3104, S3204, S3304, S3404, S3424, S3444, S3504 described in 33 is identical with S3704.

With reference to Figure 43, in response to determined in operating S3509 the operating frequency f_c calculated in S3209 is operated be more than or Equal to the second reference frequency f2, in operation 3609, controller 200,201,202,203,204,205,206,207 or 208 will Operation duty cycle d_c is set as that converter 111,112,113,114,115,116 or 117 is operating as the operation duty of half-bridge Than, and operating frequency f_c (operation S3609) is calculated based on control information.

After operation S3609 is performed, in S3709 is operated, controller 200,201,202,203,204,205,206,207 Or 208 produce and use calculated operating frequency f_c and operation duty cycle d_c to produce control signal, and control caused by exporting Signal processed.

Figure 44 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of the change of operating frequency of the wireless power sending method under electric power sending mode and operation duty cycle.

In Figure 44, operation under normal mode n, the first boost mode h1 and the second boost mode h2 with Figure 34 Operation under the normal mode n of description, the first boost mode h1 and the second boost mode h2 is identical.

Under normal mode n, in response to increasing to the second reference frequency f2 even in operating frequency f_c in the case of it is wireless Power receiver 2 receive electric power amount still greater than the electric power needed for wireless power receiver 2 amount when, controller 200,201, 202nd, 203,204,205,206,207 or 208 operator scheme changes into the 4th decompression mode I4.In the 4th decompression mode I4 In, controller 200,201,202,203,204,205,206,207 or 208 is by the operation duty cycle d_c1 (that is, of the first branch The duty cycle of two control signal con24, con25 and con28 (Figure 11,12 and 15)) ping duty cycle d_p are fixed as, will Operation duty cycle d_c2 (that is, the connections of the 4th control signal con44, con45 and con48 (Figure 11,12 and 15) of the second branch Duty cycle) 100% is fixed as, and adjust operating frequency f_c.Under the 4th decompression mode I4, operating frequency f_c is in the second reference Change in the range of frequency f2 to peak frequency f_max.

That is, be less than the second reference load amount R29 in response to load capacity, controller 200,201,202,203,204, 205th, 206,207 or 208 operated under the 4th decompression mode I4.

Figure 45 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The flow chart of operation of the wireless power sending method under electric power sending mode.

In Figure 45, operation S3110, S3210, S3310, S3410, S3430, S3450, S3510 and S3710 respectively with figure Operation S3104, S3204, S3304, S3404, S3424, S3444, S3504 described in 33 is identical with S3704.

With reference to Figure 45, in response to determined in operating S3510 the operating frequency f_c calculated in S3210 is operated be more than or Equal to the second reference frequency f2, in operation 3610, controller 200,201,202,203,204,205,206,207 or 208 will Operating frequency f_c is set as the second reference frequency f2, by operation duty cycle d_c1 (that is, the second control signals of the first branch The duty cycle of con24, con25 and con28 (Figure 11,12 and 15)) ping duty cycle d_p are fixed as, and calculate the second branch Operation duty cycle d_c2 (that is, the duty cycle of the 4th control signal con44, con45 and con48 (Figure 11,12 and 15)).

After operation S3610 is performed, in S3630 is operated, controller 200,201,202,203,204,205,206,207 Or 208 determine whether the operation duty cycle d_c2 of calculated the second branch is less than ping duty cycles d_p.

If it is more than in the operation duty cycle d_c2 for the second branch for determining to calculate in S3610 is operated in operating S3630 Or equal to ping duty cycle d_p, then in S3710 is operated, controller 200,201,202,203,204,205,206,207 or 208 produce control signal using the operating frequency f_c and operation duty cycle d_c calculated in S3610 is operated, and produced by output Control signal.

Alternatively, in response to the operation duty cycle in the second branch for determining to calculate in S3610 is operated in operating S3630 D_c2 is less than ping duty cycle d_p, in S3650 is operated, controller 200,201,202,203,204,205,206,207 or Operation duty cycle d_c is set as that converter 111,112,113,114,115,116 or 117 is operating as the operation of half-bridge by 208 Duty cycle, and operating frequency f_c is calculated based on control information.In S3650 is operated, the operation duty cycle d_c1 quilts of the first branch Ping duty cycle d_p are fixed as, and the operation duty cycle d_c2 of the second branch is fixed to 100%.

After operation S3650 is performed, in S3710 is operated, controller 200,201,202,203,204,205,206,207 Or 208 use calculated operating frequency f_c and operation duty cycle d_c to produce control signal, and control caused by exporting Signal.

Figure 46 be show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and The diagram of the change of operating frequency of the wireless power sending method under electric power sending mode and operation duty cycle.

In figures 4-6 can, the operation under normal mode n, the first boost mode h1 and the second boost mode h2 with Figure 34 Operation under the normal mode n of description, the first boost mode h1 and the second boost mode h2 is identical.

Under normal mode n, when wireless power in the example for increasing to the second reference frequency f2 even in operating frequency f_c Receiver 2 receive electric power amount still greater than the electric power needed for wireless power receiver 2 amount when, controller 200,201,202, 203rd, 204,205,206,207 or 208 operator scheme changes into the 3rd decompression mode I3.In the 3rd decompression mode I3, control Operating frequency f_c is fixed as the second reference frequency f2 by device 200,201,202,203,204,205,206,207 or 208 processed, will Operation duty cycle d_c1 (that is, the connections of second control signal con24, con25 and con28 (Figure 11,12 and 15) of the first branch Duty cycle) ping duty cycle d_p are fixed as, and adjust operation duty cycle d_c2 (that is, the 4th control signals of the second branch The duty cycle of con44, con45 and con48 (Figure 11,12 and 15)).Under the 3rd decompression mode I3, the behaviour of the second branch Make duty cycle d_c2 in the range of ping duty cycles d_p to (100%-ping duty cycle d_p) to change.

Under the 3rd decompression mode I3, it is decreased to ping duties in response to the operation duty cycle d_c2 even in the second branch The amount for the electric power that wireless power receiver 2 receives is still greater than the electric power needed for wireless power receiver 2 in example than d_p Amount, the operator scheme of controller 200,201,202,203,204,205,206,207 or 208 change into the 4th decompression mode I4. Under the 4th decompression mode, controller 200,201,202,203,204,205,206,207 or 208 accounts for the operation of the first branch Sky is fixed as than d_c1 (that is, the duty cycle of second control signal con24, con25 and con28 (Figure 11,12 and 15)) Ping duty cycle d_p, by operation duty cycle d_c2 (that is, the 4th control signal con44, con45 and con48 (figures of the second branch 11st, 12 and duty cycle 15)) be fixed as 100%, and adjust operating frequency f_c.Under the 4th decompression mode I4, operation Frequency f_c changes in the range of the second reference frequency f2 to peak frequency f_max.

That is, be less than the second reference load amount R210 in response to load capacity and be more than the 4th reference load amount R410, Controller 200,201,202,203,204,205,206,207 or 208 operates under the 3rd decompression mode I3.In response to load capacity Less than the 4th reference load amount R410, controller 200,201,202,203,204,205,206,207 or 208 is depressured mould the 4th 4 times operations of Formulas I.

The control method shown in each figure in Figure 27 to Figure 46 can be reconfigured or changed in a variety of manners.Example Such as, the operation under the 3rd boost mode h3 of the operation S3465 and S3485 or Figure 36 of Figure 35 can be added to Figure 27 extremely In the control method of each figure in Figure 46.Alternatively, can also carry out the 3rd decompression mode shown in Figure 42 and Figure 46 and/or The 4th decompression mode shown in Figure 44 and Figure 46, to substitute the first decompression mode and/or the second decompression according to another embodiment Pattern.Alternatively, in each figure in Figure 27 to Figure 46, can be performed while certain operations and certain operations pattern is omitted Operation and operator scheme.

Control method shown in Figure 27 to Figure 46 can according to the request signal inputted from wireless power receiver 2 and differently Perform.

For example, ping frequencies are selected as the frequency identical with the first reference frequency f1.Thereafter, in response to based on from nothing 2 received signal of line power receiver at wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 determine by The amount for the electric power that wireless power receiver 2 receives is less than the amount of the electric power needed for wireless power receiver 2, can also carry out in basis Operation under the first boost mode h1 of above-described embodiment.Alternatively, in response to based on the letter received from wireless power receiver 2 Determine what is received by wireless power receiver 2 number at wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 The amount of electric power is more than the amount of the electric power needed for wireless power receiver 2, can also carry out in the normal mode n according to above-described embodiment Under operation.

Thereafter, according to from 2 received signal of wireless power receiver, according to above-described embodiment can be also sequentially performed One boost mode h1, the second boost mode h2, the 3rd boost mode h3, normal mode n, the first decompression mode l1, the second decompression At least one operation in the operation of pattern 12, the 3rd decompression mode 13 and the 4th decompression mode 14.

For example, the battery in wireless power receiver 2 is in close in the case of discharging the state of electricity condition, wireless power Receiver 2 can first need substantial amounts of electric power, then, as battery gradually charges, little by little need less amount of electric power.Show at this , can be sequentially after the operation in performing the first boost mode h1, the second boost mode h2 or the 3rd boost mode h3 in example Perform in normal mode n and the first decompression mode l1, the second decompression mode l2, the 3rd decompression mode l3 or the 4th decompression mode l4 Operation.

Alternatively, it is charged in the battery of wireless power receiver 2 in a degree of example, wireless power receiver 2 can need a small amount of electric power since charging.Therefore, in this case, the first decompression mode l1, the second drop can be first carried out Operation in die pressing type l2, the 3rd decompression mode l3 or the 4th decompression mode l4.

Alternatively, when wireless power receiver 2 and wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1- Between 8 alignment dislocation (distorted) when, it is described control be changed into Figure 27 into Figure 46 load capacity increase direction.Example Such as, as the operation in normal mode n is performed or the first decompression mode l1, the second decompression mode l2, the 3rd decompression mode l3 Or wireless power receiver 2 and wireless power transmitter 1 in the case of the 4th operation in decompression mode l4,1-2,1-3,1-4, During alignment dislocation between 1-5,1-6,1-7 or 1-8, can also carry out operation in normal mode n or the first boost mode h1, Operation in second boost mode h2 or the 3rd boost mode h.Alternatively, when the operation in the first boost mode h1 is performed In the case of wireless power receiver 2 and wireless power transmitter 1, the alignment between 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 During dislocation, the operation in the second boost mode h2 can also carry out.

Alternatively, when wireless power receiver 2 and wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1- 8 when being fully aligned, the direction that the load capacity that the control is changed into Figure 27 to Figure 46 reduces.For example, performing normal mode n Performed while lower in first decompression mode l1, the second decompression mode l2, the 3rd decompression mode l3 or the 4th decompression mode l4 Operation.

The control method shown in Figure 27 to Figure 46 be can also carry out so that the frequency wirelessly sent belongs to term of reference.Example Such as, controller 200,201,202,203,204,205,206,207 or 208 is ginseng in the frequency for preferentially meeting wirelessly to send Accounting for for control signal is adjusted while examining the value of value or smaller, the value of reference value or bigger and belong to the condition of predetermined scope Sky ratio and frequency.

Figure 47 A and Figure 47 B are to show wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 Or the coil current of 1-8 and the diagram of output voltage.

The thick dashed line of Figure 47 A show the embodiment according to each figure of Fig. 7 to Figure 15 resonator 120,121, 122nd, 123,124,125,126,127 or 128 coil current, while the fine line of Figure 47 A is shown according to comparative examples Coil current.

The thick dashed line of Figure 47 B shows the output voltage (resonator shown in each figure in Fig. 7 to Figure 15 120th, the voltage at 121,122,123,124,125,126,127 or 128 both ends), the fine line of Figure 47 B is shown to be shown according to contrast The output voltage of example.

Comparative examples can be that the wireless power including full-bridge inverter operated by receiving input electric power is sent Device.In one example, input electric power is the electric power that the boost converter individually realized with inverter provides.

As shown, wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 exist Using effectively being provided while half-bridge inverter and the corresponding coil current of full-bridge inverter according to comparative examples and defeated Go out voltage.

Figure 48 A and Figure 48 B be show boost voltage and output voltage be based on wireless power transmitter 1 according to the embodiment, The diagram of the change of the duty cycle of 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8.

Figure 48 A show boost voltage (voltage of the node N2 of Fig. 8 to Figure 15), and Figure 48 B show that wireless power is sent The output voltage of device 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8.

In Figure 48 A, thick line shows the boost voltage according to 50% duty cycle, and filament shows the duty cycle according to 70% Boost voltage.

As shown, it is about 10V according to the boost voltage of 50% duty cycle, and the liter of the duty cycle according to 70% The a little higher than 16V of output voltage of unit is pressed, the boosting efficiency of higher is so effectively provided.

In addition, accordingly, as shown in Figure 48 B, wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 The output voltage according to 50% duty cycle be about 5V, and connect according to the output voltage of the boosting unit of 70% duty cycle Nearly 7V, so effectively provides the output of higher.

As described above, according to embodiment, wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and nothing Line electric power sending method efficiently and effectively reduces the quantity of the component needed for manufacture wireless power transmitter, therefore, can be real But the wireless power transmitter of existing small size and its saving material cost.In addition, wireless power transmitter according to the embodiment 1st, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power sending method are by meeting wirelessly to send needed for electric power The scope for the electric power for making wirelessly to send while the various limitations met increases conveniently to be used by user, and improves Wireless power transmitting efficiency.In addition, wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power sending method accurately control electric power transmission, therefore prevent unnecessary power consumption, wireless power from receiving The damage of the overheat of device 2 or element to wireless power receiver 2.In addition, wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power sending method, which reduce, is producing definite wireless power receiver The surge current and peak point current that may occur during the signal that whether there is.Therefore, definite nothing in a detection mode can be stablized The operation that whether there is by wireless power receiver.

Perform the operation in Fig. 7 described in this application to Figure 15 controller 200,201,202,203,204,205, 206th, 207 or 208 by being configurable for performing the hardware group of the operation described herein performed by nextport hardware component NextPort Part is realized.Example available for the nextport hardware component NextPort for performing operation described in this application include in appropriate circumstances controller, Sensor, maker, driver, memory, comparator, arithmetic logic unit, adder, subtracter, multiplier, divider, Integrator and other any electronic building bricks for being configured as performing operation described in this application.In other examples, pass through Computer hardware (for example, passing through one or more processors or computer) performs operation described in this application to realize One or more nextport hardware component NextPorts.Processor or computer can be realized by one or more treatment elements, for example, logic gate Array, controller and arithmetic logic unit, digital signal processor, microcomputer, programmable logic controller (PLC), scene can compile Journey gate array, programmable logic array, microprocessor or be configured as responding in a defined manner and execute instruction with Obtain the combination of any other devices or device of desired result.In one example, processor or computer are included (or even It is connected to) one or more memories of instruction that storage is performed by processor or computer or software.By processor or Computer implemented nextport hardware component NextPort can perform such as operating system (OS) and one or more softwares run on the OS The instruction of application or software, to perform operation described in this application.Nextport hardware component NextPort may also be responsive to the execution in instruction or software To access, operate, handle, create and store data.For the sake of simplicity, the term " processor " of odd number or " computer " can be used for Described example, but in other examples in this application is described, multiple processors or computer, or processor can be used Or computer may include multiple treatment elements or polytype treatment element, or including both.For example, can be by single Either two or more processors or processor and controller realize single nextport hardware component NextPort or two or more to processor Multiple nextport hardware component NextPorts.One or more hardware can be realized by one or more processors or processor and controller Component, can be one or more to realize by other one or more processors or another processor and another controller Other nextport hardware component NextPorts.One or more processors either processor and controller can realize single nextport hardware component NextPort or two or More nextport hardware component NextPorts.Nextport hardware component NextPort can have the different processing configuration of any one or more, its example includes single handle Device, independent processor, parallel processor, SISD single instruction single data (SISD) multiple treatment device, single-instruction multiple-data (SIMD) are more Weight processing unit, multiple instruction single data (MISD) multiple treatment device and multiple-instruction multiple-data (MIMD) multiple treatment device.

It is used for performing in Fig. 2, Fig. 3 and Figure 16 to Figure 48 B of operation described in this application by computer hardware execution The method shown, for example, by one or more processors or computer, is embodied as above-mentioned execute instruction or software, to hold The row operation described in this application performed by the method.For example, can by single processor or two or more Processor (or processor and controller) performs single operation or two or more operations.One or more places can be passed through Manage device (or processor and controller) and perform one or more operations, and other one or more processors can be passed through (or another processor and another controller) performs other one or more operations.One or more processors (or place Manage device and controller) it can perform single operation or two or more operations.

In order to individually or jointly indicate or configure one or more processors or computer to be used as machine computer Or special purpose computer is operable to perform the operation performed by nextport hardware component NextPort as described above and method, is calculated for controlling Machine hardware (for example, one or more processors or computer) is to realize nextport hardware component NextPort as described above and perform as described above Method instruction or software can be written as computer program, code segment, instruction or its any combination.In one example, Instruction or software include the machine code directly performed by one or more processors or computer, are such as produced by compiler Raw machine code.In another example, instruct or software includes the use of interpreter and passes through one or more processor Or the code of the higher level of computer execution.Can be based on corresponding in the block diagram and flow chart that are shown in attached drawing and specification Description (disclosing the algorithm for performing the operation performed by nextport hardware component NextPort as described above and method) uses any programming Language writes instruction or software.

It is as described above hard to realize for control computer hardware (for example, one or more processors or computer) Part component and instruction or software and arbitrarily associated data, data file and the data structure for performing method as described above It can be recorded, store or be fixed among or on one or more non-transitory computer-readable storage medias.Nonvolatile Property computer-readable recording medium example include read-only storage (ROM), random access memory (RAM), flash memory, CD- ROM、CD-R、CD+R、CD-RW、CD+RW、DVD-ROM、DVD-R、DVD+R、DVD-RW、DVD+RW、DVD-RAM、BD-ROM、 BD-R, BD-R LTH, BD-RE, tape, floppy disk, magneto-optic data storage device, optical data storage device, hard disk, solid-state disk with And be configured as storing in a manner of non-transitory execution or software and associated data, data file and data structure and By described instruction or software and associated data, data file and data structure provide one or more processors or Computer is so that other any devices of one or more processors or computer executable instructions.In one example, refer to Order or software and any associated data, data file and data structure distribution are connecting the computer system of internet On, stored in a distributed way with will pass through one or more processors or computer, access and execute instruction and software with And arbitrarily associated data, data file and data structure.

As just example is not use up, electronic device as described herein can be such as cell phone, smart mobile phone, can wear Wearing device, (such as ring, wrist-watch, glasses, bracelet, foot chain, waistband, necklace, earrings, headband, the helmet are embedded in the clothes Device), (such as laptop, notebook, mini-notebook, net book super move portable personal computer (PC) Dynamic PC (UMPC)), tablet PC (tablet), flat board mobile phone, personal digital assistant (PDA), digital camera, portable game control Device, MP3 player, portable/personal multimedia player (PMP), electric palm book, global positioning system (GPS) navigation dress Put or the mobile device of sensor or such as Desktop PC, high-definition television (HDTV), DVD player, blue light play Device, set-top box or the fixing device of household electrical appliance or any other mobile device or fixing device.In one example, may be used Object wearing device is the device for designeding to be able to be directly installed on the body of user, such as glasses or bracelet.In another example In, wearable device is any device being installed on using attachment device on the body of user, is such as attached to use using armlet The arm at family or hung over using lashing user neck smart mobile phone or tablet.

Although the disclosure includes specific example, will be apparent that after present disclosure is understood, not In the case of departing from claim and the spirit and scope of its equivalent, these examples can be made in terms of form and details Various changes.Example described here is considered only as describing significance, rather than for purposes of limitation.Feature in each example Or the description of aspect is considered as the similar feature or aspect suitable for other examples.Retouched if performed in a different order The technology stated, and/or if in different ways come combine the component in described system, structure, device or circuit, And/or replaced by other assemblies or its equivalent or increased the component in described system, structure, device or circuit, then Rational result can be obtained.Therefore, the scope of the present disclosure is not limited by embodiment, but by claim and its is equal Thing limits, and whole change in the range of claim and its equivalent will be understood as being included in the disclosure.

Claims (24)

1. a kind of wireless power transmitter, including：

Converter, including the multiple switch element of bridge circuit is formed, and be configured to respond to multiple control signal and export Alternating voltage；

Resonator, including resonant capacitor and resonance coil, and be configured as receiving the alternating voltage, sent with radio Electric power；And

Controller, is configured as performing first mode operation and second mode operation,

In first mode operation, the duty cycle of the multiple control signal is fixed, in the multiple control signal The frequency change of at least one control signal, and the multiple control signal is exported,

In second mode operation, the frequency of the multiple control signal is fixed, in the multiple control signal extremely The duty cycle of a few control signal reduces, and exports the multiple control signal.

2. wireless power transmitter as claimed in claim 1, wherein, the controller also performs the third mode operation, in institute State in the third mode operation, the frequency of the multiple control signal is fixed, at least one control in the multiple control signal The duty cycle increase of signal processed, and export the multiple control signal.

3. wireless power transmitter as claimed in claim 1, wherein, the controller is additionally configured in response to the multiple Corresponding signal in control signal and make each switching elements ON and the disconnection in the multiple switch element, according to described The operation duty cycle of at least one switch element in multiple switch element come determine the amplitude of the alternating voltage and according to The operating frequency of at least one switch in the multiple switch element determines the frequency of the alternating voltage.

4. wireless power transmitter as claimed in claim 3, wherein, the controller is additionally configured to：

Setting detection duty cycle determines whether there is wireless power receiver at the same time, and

Based on the wireless power receiver in response to the operating frequency for detection frequency, be used to determine whether that there are the nothing Line power receiver and the operation duty cycle whether for the detection duty cycle signal the electric power that receives of frequency Difference between the amplitude of electric power needed for amplitude and the wireless power receiver and select and perform the first mode operation Pattern operation in being operated with the second mode.

5. wireless power transmitter as claimed in claim 3, wherein, the controller setting detection duty cycle determine at the same time be It is no there are wireless power receiver,

In the first mode operating process, the controller exports the multiple control signal, so that the operation duty Than being fixed to the detection duty cycle, and make the operating frequency from the first reference frequency to the model of the second reference frequency Interior change is enclosed, and

In the second mode operating process, the controller exports the multiple control signal, so that the operating frequency Second reference frequency is fixed to, and makes the operation duty cycle from the first reference duty cycle to the detection duty Change than in the range of.

6. wireless power transmitter as claimed in claim 5, wherein, the controller also performs the third mode operation, in institute State in the third mode operation, the operation duty cycle is fixed to described first and refers to duty cycle, and the operating frequency is from institute State and change in the range of the second reference frequency to peak frequency, and export the multiple control signal.

7. wireless power transmitter as claimed in claim 5, wherein, the bridge circuit is to include the first branch and the second branch Full-bridge circuit, and

The controller also performs the third mode operation, and in the third mode operation, the operating frequency is fixed to institute State the second reference frequency, the duty cycle of the first branch is fixed to the detection duty cycle, and the second branch Duty cycle is change.

8. wireless power transmitter as claimed in claim 5, wherein, the bridge circuit is to include the first branch and the second branch Full-bridge circuit, and

The controller also performs the third mode operation, in the third mode operation, the duty cycle quilt of the first branch It is fixed as the detection duty cycle, the duty cycle of the second branch is fixed to 100%, and the operating frequency is from institute State and change in the range of the second reference frequency to peak frequency.

9. a kind of wireless power transmitter, including：

Converter, including the multiple switch element of bridge circuit is formed, and be configured to respond to export in multiple control signal Alternating voltage；

Resonator, including resonant capacitor and resonance coil, and be configured to receive the alternating voltage, wirelessly to send Electric power；And

Controller, is configured as performing first mode operation, second mode operation and the third mode operation,

In first mode operation, the duty cycle of the multiple control signal is fixed, in the multiple control signal The frequency of at least one control signal changes in the range of from the first reference frequency to the second reference frequency, and described in output Multiple control signal,

In second mode operation, the frequency of the multiple control signal is fixed, in the multiple control signal extremely The duty cycle of a few control signal changes in the range of from the first reference duty cycle to the second reference duty cycle, and exports The multiple control signal, and

In the third mode operation, the duty cycle of the multiple control signal is fixed, in the multiple control signal The frequency of at least one control signal changes in the range of less than first reference frequency, and exports the multiple control Signal.

10. wireless power transmitter as claimed in claim 9, wherein, each switch element in the multiple switch element Switched on and off in response to the corresponding signal in the multiple control signal, according in the multiple switch element at least The operation duty cycle of one switch element determines the amplitude of the alternating voltage and according in the multiple switch element The operating frequency of at least one switch element determines the frequency of the alternating voltage.

11. wireless power transmitter as claimed in claim 10, wherein, in the first mode operating process, the control Device processed exports the multiple control signal, and the multiple control signal has from first reference frequency to the described second reference Frequency in the range of frequency has first to refer to duty cycle at the same time,

In the second mode operating process, the controller exports the multiple control signal, the multiple control signal With first reference frequency, and the duty cycle of at least one control signal in the multiple control signal is from first Change in the range of duty cycle to the second duty cycle, and

In the third mode operating process, the controller exports the multiple control signal, the multiple control signal With less than the frequency in the range of first reference frequency at the same time with second duty cycle.

12. wireless power transmitter as claimed in claim 9, wherein, the controller also performs fourth mode operation, in institute State in fourth mode operation, the frequency of the multiple control signal is fixed, at least one control in the multiple control signal The duty cycle of signal processed changes in the range of higher than described second with reference to duty cycle, and exports the multiple control signal.

13. a kind of wireless power transmitter, including：

Converter, including the multiple switch element of bridge circuit is formed, and be configured to respond to multiple control signal and export Alternating voltage；

Resonator, including resonant capacitor and resonance coil, and be configured as receiving the alternating voltage, wirelessly to send Electric power；And

Controller, is configured as performing first mode operation and second mode operation,

In first mode operation, the duty cycle of the multiple control signal is fixed, in the multiple control signal The frequency of at least one control signal is determined based on the control information received from wireless power receiver, and is exported described more A control signal, and

In second mode operation, the frequency of the multiple control signal is fixed, in the multiple control signal extremely The duty cycle of a few control signal is based on the control information and determines, and in response to true in first mode operation Fixed frequency is in outside term of reference, exports the multiple control signal.

14. wireless power transmitter as claimed in claim 13, wherein, the controller is additionally configured to setting detection duty Than determining whether there is the wireless power receiver at the same time, by the way that at least one control in the multiple control signal is believed Number duty cycle be set as the detection duty cycle to perform first mode operation, based on the control information to determine The frequency of at least one control signal in multiple control signal is stated, and according to the detection duty cycle and the definite frequency Rate exports the multiple control signal.

15. wireless power transmitter as claimed in claim 14, wherein, operated in response to the first mode described definite Frequency is higher than the second reference frequency, and the controller is additionally configured to by by least one control in the multiple control signal The frequency of signal processed is set as second reference frequency to perform the second mode operation, based on the control information come really The duty cycle of at least one control signal in fixed the multiple control signal, and according to second reference frequency and described Definite duty cycle exports the multiple control signal.

16. wireless power transmitter as claimed in claim 15, wherein, accounted for described in being operated in response to the second mode Sky than be less than than it is described detect duty cycle it is low first refer to duty cycle, the controller is additionally configured to by will be the multiple The duty cycle of at least one control signal in control signal is set as described first with reference to duty cycle to perform the third mode behaviour Make, determine the frequency of at least one control signal in the multiple control signal based on the control information, and according to Described first refers to duty cycle and the multiple control signal of identified rate-adaptive pacemaker.

17. wireless power transmitter as claimed in claim 15, wherein, the bridge circuit is to include the first branch and second The full-bridge circuit on road, and

It is less than first reference lower than the detection duty cycle in response to the duty cycle determined described in second mode operation Duty cycle, the controller are additionally configured to switch element by controlling the first branch by the multiple control signal At least one control signal duty cycle be set as first with reference to duty cycle come perform the third mode operation, based on the error Information controls the switch element of the second branch to determine accounting for at least one control signal in the multiple control signal Empty ratio, and it is described more to export with reference to duty cycle and identified duty cycle according to second reference frequency, described first A control signal.

18. wireless power transmitter as claimed in claim 14, wherein, in response to true in first mode operation The fixed definite frequency is less than the first reference frequency, and the controller is additionally configured to by by the multiple control signal In the frequency of at least one control signal be set as first reference frequency to perform second mode operation, based on institute Control information is stated to determine the duty cycle of at least one control signal in the multiple control signal, and according to described first Reference frequency and the definite duty cycle export the multiple control signal.

19. wireless power transmitter as claimed in claim 18, wherein, it is described true in being operated in response to the second mode Fixed duty cycle is higher than second higher than the detection duty cycle and refers to duty cycle, and the controller is additionally configured to by by institute The duty cycle for stating at least one control signal in multiple control signal is set as described second with reference to duty cycle to perform the 3rd Pattern operates, and the frequency of at least one control signal in the multiple control signal is determined based on the control information, and And the multiple control signal is exported with reference to duty cycle and the definite frequency according to described second.

20. wireless power transmitter as claimed in claim 13, wherein, each switch element in the multiple switch element Switched on and off in response to the corresponding control signal in the multiple control signal, according in the multiple switch element The operation duty cycle of at least one switch element determines the amplitude of the alternating voltage, and according to the multiple switch element In the operating frequency of at least one switch element determine the frequency of the alternating voltage.

21. a kind of method for wirelessly sending electric power, including：

Bridge circuit is formed using the multiple switch element for forming bridge circuit, to export alternating current in response to multiple control signal Pressure, so as to wirelessly send electric power；

First mode operation is performed, the execution first mode operation includes：

The duty cycle of fixed the multiple control signal,

Change the frequency of at least one control signal in the multiple control signal, and

Export the multiple control signal；And

Second mode operation is performed, the execution second mode operation includes：

The frequency of fixed the multiple control signal,

Reduce the duty cycle of at least one control signal in the multiple control signal, and

Export the multiple control signal.

22. method as claimed in claim 21, the method further include：

The third mode operation is performed, the execution the third mode operation includes：

The frequency of fixed the multiple control signal,

Increase the duty cycle of at least one control signal in the multiple control signal, and

Export the multiple control signal.

23. method as claimed in claim 21, the method further include：

Switched on and off in response to the corresponding signal in the multiple control signal each in the multiple switch element Switch element；

The operation duty cycle of at least one switch element in the multiple switch element determines the alternating voltage Amplitude；And

The operating frequency of at least one switch element in the multiple switch element determines the frequency of the alternating voltage Rate.

24. method as claimed in claim 23, the method further include：

Setting detection duty cycle determines whether there is wireless power receiver at the same time；And

Based in response to the operating frequency be detection frequency, be used to determine whether that there are the wireless power receiver and institute Operation duty cycle is stated whether for the amplitude of electric power that receives of frequency of the signal of the detection duty cycle and the wireless power Difference between the amplitude of electric power needed for receiver and select and perform the first mode operation and second mode operation In a pattern operation.