CN107919736A

CN107919736A - Wireless power transmitter

Info

Publication number: CN107919736A
Application number: CN201710905242.9A
Authority: CN
Inventors: 洪允基; 孙廷虎; 河根秀; 金大植; 慎银瑛; 朴胜圆
Original assignee: Samsung Electro Mechanics Co Ltd
Current assignee: Wits Co Ltd
Priority date: 2016-10-10
Filing date: 2017-09-29
Publication date: 2018-04-17

Abstract

The present invention provides a kind of wireless power transmitter, and the wireless power transmitter includes：With at least one switch element and it is configured as producing the converter of boosting input electric power；Resonator and controller.The resonator is configured as receiving the boosting input electric power as exchange (AC) electric power, and sends ping signals in a detection mode, for determine exterior object whether close to and any of type of the exterior object or the two.The controller is configured as controlling the switch element, and the duty cycle for being provided to the signal of the switch element is gradually increased under the detection pattern.

Description

Wireless power transmitter

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, No. 10-2016-0131880 and Korea Spro 10-2016-0153568 that property right office submits The rights and interests of the priority of state's patent application, the complete disclosure of the korean patent application are wrapped by quoting for all purposes It is contained in this.

Technical field

A kind of this disclosure relates to device for being used to wirelessly send electric power.

Background technology

Recently, many mobile devices to charge in a manner of wirelessly have been had been incorporated into.Correspondingly, had been incorporated into Wirelessly mode sends many wireless power transmitters of electric power to mobile device.According to such wireless power dispensing device, Carrying out on reducing material cost, meeting various demands and improving the research of wireless power transmitting efficiency.Also have been carried out On improving the research of convenience for users and wireless power transmitting efficiency while various demands are met.

The content of the invention

The one side of the disclosure can provide a kind of wireless power transmitter for wirelessly sending electric power.

In a general aspect, a kind of wireless power transmitter includes：With at least one switch element and it is configured To produce the converter of boosting input electric power；Resonator and controller.The resonator is configured as receiving the boosting input Electric power sends ping signals in a detection mode as exchange (AC) electric power, for determining whether exterior object is leaning on Any of near and the exterior object type or the two.The controller is configured as controlling the switch element, And the duty cycle for being provided to the signal of the switch element is set gradually to increase under the detection pattern.

The controller can make the duty cycle of the signal gradually increase the amount equal with reference duty cycle.

The controller can make the duty cycle of the signal under the initial mode of operation of the detection pattern The first duty cycle from 0% increases.

The initial mode of operation can be with continuing reference time or the time longer than the reference time in abort state The pattern for sending the ping signals afterwards is corresponding.

The controller can make the duty cycle of the signal increase to ping duty cycles, and make the boosting Input electric power increases to the target boosting input electric power for reaching the ping signals for producing the ping duty cycles.

The controller is also configured to calculate the boosting with gradually increasing to the target boosting input electric power The relevant data of voltage level of input electric power, with it is described boosting input electric power the corresponding duty cycle of the voltage level by It is cumulative big.

The controller is also configured to make the signal under the standby operating mode of the detection pattern The duty cycle increases from the second duty cycle, and the voltage water of second duty cycle based on the boosting input electric power Put down and determine.

The standby operating mode can be with sending pattern of the ping signals continuously less than the reference time in abort state It is corresponding.

Can be boosted described in phase estimate based on the ping signals voltage level of input electric power.

The voltage level and the data that can be based on the boosting input electric power calculate second duty cycle.

Second duty cycle can be by being applied to the ping duty cycles and definite, the Weighted Index by Weighted Index By by the target boost input electric power voltage level with it is described boost input electric power the voltage level compare and It is calculated.

The data can be set in the form of a lookup table, and second duty cycle can be retrieved by the look-up table With it is described boosting input electric power the corresponding duty cycle of the voltage level and determine.

In another general aspect, a kind of wireless power transmitter, the wireless power transmitter including first mode and Operated under the detection pattern of second mode, and ping signals, the wireless power transmitter are sent under the detection pattern Including converter, resonator and controller.The converter includes at least one switch element, and is configured as based on described Input electric power is converted to boosting input electric power by the switching manipulation of switch element, and exports the boosting input electric power as friendship Flow (AC) electric power.The resonator is configured as producing the ping signals from the AC electric power.The controller is configured as The switch element is controlled, is provided to the duty cycle of signal of the switch element in the first mode from first Duty cycle increases, and makes the duty cycle of the signal in the second mode from higher than first duty cycle by the Two duty cycles increase.

The controller is also configured to make in the first mode the duty cycle of the signal to increase To ping duty cycles, and the boosting input electric power can reach the ping signals for producing the ping duty cycles Target boosting input electric power.

Second duty cycle can be based on that Weighted Index is applied to the ping duty cycles and is determined, the Weighted Index Calculated by the way that the voltage level of target boosting input electric power is compared with the voltage level of the boosting input electric power Draw.

The switch element can be configured as performing the conversion operation from the input electric power to the boosting input electric power And the boosting input electric power output is operated for the output of alternating electromotive force.

In another general aspect, a kind of wireless power transmitter includes converter, resonator and controller.The converter It is configured as producing exchange (AC) voltage.The resonator is configured as receiving the AC voltages, and sends and be used for outside definite The whether nigh ping signals of portion's object.The controller is configured as controlling the switch element in a detection mode, and And the duty cycle for being provided to the signal of the switch element increases to target from the first duty cycle according to step size and accounts for Empty ratio.

The step size is integer and first duty cycle can be 0%.

According to the one side of the disclosure, a kind of wireless power transmitter may include：Converter, including at least one switch member Part and input electric power is boosted, then produce boosting input electric power；Resonator, exchange (AC) electric power is received from the converter Form the boosting input electric power, and in a detection mode send ping signals, for determining exterior object whether just Close to and any of type of the exterior object or the two；And controller, control at least one switch member Part, wherein, under the detection pattern, the controller makes the signal for being provided at least one switch element Duty cycle gradually increases.

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 the operation for showing the wireless power transmitter for sending the electric power needed for wireless power receiver according to nothing The distance between line power transmitter and wireless power receiver and change diagram.

Fig. 4 is the operation for showing the wireless power transmitter for sending the electric power needed for wireless power receiver according to nothing Aligning degree between line power transmitter and wireless power receiver and the diagram changed.

Fig. 5 is the operation for showing the wireless power transmitter for sending the electric power needed for wireless power receiver according to nothing The charge volume of the battery of line power receiver and the diagram changed.

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 construction 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 standby (standby) of wireless power sending method The operational flowchart of operation under operator scheme.

Figure 18 is to show wireless power transmitter according to the embodiment and wireless power sending method in initial mode of operation With the diagram of the change of the boost voltage (boost voltage) under standby operating mode.

Figure 19 to Figure 24 is the wireless power transmitter and wireless power sender being shown respectively under electric power sending mode The oscillogram of the operation of method.Oscillogram represents the waveform of the control signal of the switch element of control wireless power transmitter.

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

Figure 27 to Figure 46 is that wireless power transmitter according to the embodiment and wireless power sending method is shown respectively in electricity The operational flowchart of operation under power sending mode, and respectively illustrate operating frequency and operate 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 that the change based on the duty cycle in wireless power transmitter according to the embodiment is shown respectively Boost voltage and output voltage diagram.

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

Embodiment

There is provided detailed description below with help reader obtain to method as described herein, equipment and/or it is comprehensive Understand.However, after present disclosure is understood, method as described herein, equipment and/system various conversion, Modification and equivalent will be apparent.The order of operation as described herein is only example, and is not limited to be explained here The order stated, but after present disclosure is understood, in addition to the operation that must be occurred in a specific order, it can make Go out obvious change.In addition, in order to improve clearness and terseness, the description of feature as known in the art can be omitted.

Feature as described herein can be implemented in different ways, and not be construed as limited to as described herein Example.More precisely, providing example as described herein, being merely to illustrate after present disclosure is understood will It is some feasible patterns in many feasible patterns for obviously realize method described herein, equipment and/system.

Throughout the specification, when such as element of layer, region or substrate be described as " being located at " another element " on ", When " being connected to " another element or " being attached to " another element, the element can directly " be located at " 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.On the contrary, When element be described as " located immediately at " another element " on ", " being directly connected to " another element or " being bonded directly to " another member During part, other elements between them may not be present.

Include the related any one listd or any two or more item as used herein the term " and/or " Any combination.

Although the term of such as " first ", " second " and " the 3rd " can be used herein to describe each component, component, area Domain, layer or part, but these components, component, region, layer or part are limited from these terms.More precisely, these Term is only used for distinguishing a component, component, region, layer or part and another component, component, region, layer or part.Cause This, in the case where not departing from exemplary teaching, the first component that is referred to as in example described herein, component, region, layer or Part is also referred to as second component, component, region, layer or part.

Term as used herein is only used for describing each example, rather than the limitation disclosure.Unless in context in addition Clearly indicate, otherwise singulative is also intended to include plural form.Term "comprising", " comprising " and " having " are enumerated existing Feature, quantity, operation, component, element and/or their combination, but do not preclude the presence or addition of one or more Other features, quantity, operation, component, element and/or their combination.

Due to manufacturing technology and/or tolerance, the change of the shape shown in attached drawing may occur in which.Therefore, it is described here to show Example is not limited to the given shape shown in attached drawing, and is included in the change in shape occurred during manufacture.

Exemplary feature described here can be according to understanding that it is various that present disclosure will be apparent upon Mode is combined.In addition, although example described here has a various constructions, but understand present disclosure it It is evident that, other constructions are also feasible 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 are coupled to each other by magnetic resonance and/or magnetic induction.

Wireless power receiver 2 provides the electric power received to electronic device 3.Electronic device 3 is utilized and connect by wireless power Receive the electric power that device 2 provides and perform the operation such as charged to internal cell.Wireless power receiver 2 is present in as a component In electronic device 3, or the single device of electronic device 3 can be attached to.

With reference to Fig. 1, wireless power receiver 2 is arranged on the position adjacent with wireless power transmitter 1, but can change wireless Relative distance and/or alignment between power transmitter 1 and wireless power receiver 2.In wireless power receiver 2 due to wireless The increase of the distance between power transmitter 1 and wireless power receiver 2 or misalignment are without fully receiving required electric power In the case of, due to the battery of electronic device 3 close to discharge electricity condition and in the case of resulting in the need for a large amount of electric power and/or In the case of other desired, wireless power transmitter 1 can operate in a boost mode, with to wireless power receiver 2 stably Send electric power.Alternatively, in wireless power receiver 2 since the distance between wireless power transmitter 1 reduces or due to nothing Aligning degree between line power transmitter 1 and wireless power receiver 2 improves and causes to receive required electric power or more than required Power condition under, due to the battery of electronic device 3 close to needed full of electricity condition reduce electricity in the case of, wirelessly Power transmitter 1 can be operated with decompression mode, with prevent unnecessary power consumption and prevent wireless power receiver 2 and/ Or electronic device 3 overheats.

Fig. 2 is the operational flowchart for schematically showing the method according to the embodiment for being used to transmit wirelessly electric power.

The wireless power sending method of Fig. 2 can be performed by wireless power transmitter 1.Although shown according to temporal order The flow chart of Fig. 2, but the order of certain operations can change or certain operations can be omitted, and some stages also can be periodically Ground repeats.As an example, wireless power transmitter 1 periodically enters simulation ping stages (S10) and numeral ping stages (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 simulation ping stages, wireless power transmitter 1 sends simulation ping signals.In the impedance water of simulation ping signals In the case of flat change, wireless power transmitter 1 determines that exterior object is located at around wireless power transmitter 1.For example, radio Power transmitter 1 sends simulation ping signals by transmit coil or other coils, and utilizes the coil for sending simulation ping signals Impedance change or simulate the horizontal changes of ping signals to determine exterior object whether positioned at wireless power transmitter 1 week Enclose.Simulation ping signals can be sent according to the cycle of setting.

In simulating the ping stages determine predetermined exterior object it is adjacent with wireless power transmitter 1 in the case of, wirelessly Power transmitter 1 enters numeral ping stages (S20).Alternatively, cycle of the wireless power transmitter 1 based on setting enters numeral The ping stages.Wireless power transmitter 1 sends numeral ping signals in the digital ping stages, to determine in wireless power transmitter Whether the exterior object near 1 is wireless power receiver.For example, wireless power transmitter 1 is according in the transmission numeral Whether after ping signals from wireless power receiver 2 response signal is received to determine whether exterior object adjacent thereto is nothing Line power receiver.

In response to reception wireless power receiver to the response signals of digital ping signals, wireless power transmitter 1 into Enter verification and configuration phase (S30).In the case where exterior object is wireless power receiver, wireless power receiver sends and connects The response signal of the digital ping signals of receipts.The response signal of wireless power receiver includes connecing with signal strength, wireless power Receive the relevant information of electric power needed for the type, input voltage intensity, wireless power receiver of device and instruction wireless power connects Receive any one in the poor error amount between electric power and the electric power that is received by wireless power receiver needed for device or Any combinations of any two or more items.Therefore, wireless power transmitter 1 believes digital ping using wireless power receiver Number response signal confirm target and electricity needs.

Then, wireless power transmitter 1 enters electric power transmission phase (S40), in electric power transmission phase (S40), radio Power transmitter 1 wirelessly provides electric power using the information confirmed in verification and configuration phase (S30) to wireless power receiver.

At electric power transmission phase (S40), wireless power transmitter 1 in the normal mode, boost mode or decompression mode operation.

Normal mode is for example such operator scheme：Control for the switch element for controlling wireless power transmitter 1 The duty cycle (duty cycle) (or abbreviation " duty (duty) ") of signal is fixed to arbitrary value, and wireless power transmitter 1 operating frequency changes in preset reference range.The value that duty cycle is fixed can produce to be used to send as described above Simulation ping signals and/or numeral ping signals is used to determine whether that there are the control of other of wireless power receiver signal The duty cycle of signal.The term of reference of operating frequency can be the available frequency range of standard by restriction, can pass through Consider the scope that the degree of heat produced in wireless power receiver determines, can be that nothing is used in available frequency range The area of space that line power transmitter charges, or can be by considering that wireless power transmitter 1 and wireless power connect Receive the scope that the power transmission characteristics between device 2 determine.

Boost mode is such operator scheme of such as wireless power transmitter 1：Under boost mode, wireless power connects Device 2 is received to be operating as receiving the electricity more than the electricity in normal mode reception.Wireless power transmitter 1 can adjust duty cycle or Operating frequency is adjusted to less than the arbitrary value in term of reference, to allow wireless power receiver 2 to receive more electricity.

Decompression mode is such operator scheme of such as wireless power transmitter 1：In buck mode, wireless power connects Device 2 is received to be operating as receiving the electricity fewer than the electricity received in normal mode.Wireless power transmitter 1 can adjust duty cycle or The arbitrary value that operating frequency is adjusted to be more than in term of reference, to allow wireless power receiver 2 to receive less electricity.

Although wireless power transmitter 1 is shown in Fig. 2 using simulation ping signals and numeral ping signals to determine nothing The situation that line power receiver 2 whether there is, but other signals in addition to ping signals can also be used in wireless power transmitter 1 To determine that wireless power receiver 2 whether there is.

In addition, though show that wireless power transmitter 1 performs simulation ping stages and numeral ping stages with true in Fig. 2 Surely it whether there is the situation of wireless power receiver 2, but wireless power transmitter 1 can also determine whether in a different manner There are wireless power receiver 2.For example, wireless power transmitter 1 can be (such as blue by using single local communication circuit Tooth) to determine that wireless power receiver 2 whether there is, and also can be by a stage or three or more stages come really Determining exterior object, whether the object adjacent and adjacent with wireless power transmitter 1 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 change operation diagram, and show wireless power transmitter 1 and including wireless power receiver 2 electronics dress Put 3.

Fig. 3 shows situation (a1) to situation (c1).Situation (a1) shows that wireless power receiver 2 is installed on radio Situation on power transmitter 1, situation (b1) show that wireless power receiver 2 is separately less than or waits with wireless power transmitter 1 In the situation of the distance D1 of interval threshold distance Dt, and situation (c1) shows that wireless power receiver 2 is sent out with wireless power Send the situation of distance D2 of the device 1 separately more than or equal to interval threshold distance Dt.

It is required in order to receive wireless power receiver 2 in situation (c1) compared with situation (a1) or situation (b1) Electricity, wireless power transmitter 1 need to send more electricity.On the contrary, in the case of situation (a1), with situation (b1) or feelings Shape (c1) is compared, even if when the minimum electricity that wireless power transmitter 1 is sent, wireless power receiver 2 still receives required Electricity.

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 be equal to or less than the interval threshold apart from when, Wireless power transmitter 1 operates in the normal mode.That is, in situation (a1) and/or situation (b1), wireless power is sent Device 1 is with fixed duty cycle and changes the operating frequency of switch to adjust the Normal Mode Operation of output.

However, when the distance between wireless power transmitter 1 and wireless power receiver 2 are more than the interval threshold distance When, wireless power transmitter 1 operates in a boost mode, to be compensated to the distance.That is, in situation (c1), nothing Line power transmitter 1 adjusts duty cycle and/or operating frequency.

Alternatively, wireless power transmitter 1 can operate in the normal mode in situation (b1), and also can be in situation (a1) operated in decompression mode.

Fig. 4 is to show wireless power transmitter 1 based on pair between wireless power transmitter 1 and wireless power receiver 2 The diagram of the operation of the change of accuracy, and show that electronic device 3 and wireless power including wireless power receiver 2 are sent Device 1.

Fig. 4 shows situation (a2) to situation (c2).In situation (a2), the center of wireless power receiver 2 Coincide with one another with the center of wireless power transmitter 1.In situation (b2), the center of wireless power receiver 2 and wireless power The distance L1 of the center misalignment of transmitter 1 is less than or equal to interval threshold distance Lt.Situation (c2) shows that wireless power connects The distance L2 separated for receiving the misalignment between the center and the center of wireless power transmitter 1 of device 2 is greater than or equal to interval threshold It is worth the situation of distance Lt.

Compared with situation (a2) or situation (b2), in the case of situation (c2), in order to receive wireless power receiver 2 Required electricity, wireless power transmitter 1 need to send more electricity.On the contrary, in the case of situation (a2), with situation (b2) or situation (c2) is compared, even if wireless power transmitter 1 sends minimum electricity, wireless power receiver 2 still receives institute The electricity needed.

In the illustrated example, effectively filling when interval threshold distance Lt represents to send with maximum power in the normal mode Electrical distance.

Similar to the situation described in Fig. 3, in situation (a2) and/or situation (b2), wireless power transmitter 1 is with normal Pattern operates.In situation (c2), wireless power transmitter 1 operates in a boost mode.Alternatively, in situation (a2), wirelessly Power transmitter 1 is also operated with decompression mode.

Fig. 5 is the operation of the change for the charge volume for showing battery of the wireless power transmitter 1 based on wireless power receiver 2 Diagram.

Battery charge volume close to fully charged (situation (a3)) in the case of, wireless power receiver needs minimum electricity Amount.Battery charge volume close in the case of being discharged (situation (c3)), wireless power receiver needs more electricity.

Wireless power transmitter 1 from 2 received signal of wireless power receiver in response to determining operator scheme.In this feelings Under condition, wireless power transmitter operates in the normal mode in situation (b3), is operated in a boost mode in situation (c3), in feelings Operated in shape (a3) with decompression 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, wherein, 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 f1 And second adjust operating frequency between reference frequency f2.Duty cycle under normal mode can be that wireless power transmitter is used The duty cycle for being used to determine whether the signal there are wireless power receiver.In the normal mode, when wireless power receiver 2 When departing slightly from wireless power transmitter 1 or needing more electricity, wireless power transmitter is increased by reducing frequency The electricity received by wireless power receiver 2.Alternatively, in the normal mode, when wireless power receiver 2 is slightly closer to wirelessly Power transmitter 1 or when needing less electricity, wireless power transmitter 1 is connect by increasing frequency to reduce by wireless power Receive the electricity that device 2 receives.

In addition, received in the normal mode higher than wireless power receiver 2 when the electricity needed for wireless power receiver 2 During the maximum of electric power, operator scheme is changed into boost mode by wireless power transmitter 1, so that wireless power receiver 2 receives Electricity be greater than or equal to 2 receivable electricity of wireless power receiver in the normal mode.In this case, wireless power The operating frequency of transmitter is fixed as the first reference frequency f1, and adjusts duty cycle.Even if in addition, it is increased when duty cycle To limited range limiting value when the electricity that is received of wireless power receiver be also insufficient to it is more in the case of, wireless power In addition transmitter 1 reduces operating frequency after duty cycle is fixed as the limiting value.It is described below detailed under boost mode Operation.

In addition, when the electricity needed for wireless power receiver 2 is less than what wireless power receiver 2 received in the normal mode During the minimum value of electric power, operator scheme is changed into decompression mode by wireless power transmitter 1.In this case, wireless power is sent out Send the operating frequency of device 1 to be fixed as the second reference frequency f2, and adjust duty cycle.Alternatively, wireless power transmitter can be grasped As full-bridge, half-bridge is also operable to.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 can be under the available frequency range limited by standard or other agreements respectively Limit value and upper limit value.Alternatively, the first reference frequency f1 and the second reference frequency f2 may be based in minimum frequency f_min to most The hot degree produced in the range of big frequency f_max in wireless power receiver 2, or use wireless power transmitter 1 The scope of the area of space to charge determines.By determining the first reference frequency f1 and the second reference frequency as described above F2, wireless power transmitter 1 more stably operate in the range of restriction, and prevent the element in wireless power receiver 2 Damage or overheat.

Alternatively, the first reference frequency f1 and the second reference frequency f2 is also by considering in minimum frequency f_min to maximum Power transmission characteristics in the range of frequency f_max between wireless power transmitter 1 and wireless power receiver 2 determine.

In the case where operating frequency is in the preset range between frequency values f2 and f_max as shown in Figure 6, due to The change of yield value has gentle slope relative to the change of frequency values, therefore is easy to control wireless power transmitter 1 so that Wireless power receiver 2 receives suitable electricity.However, due to being reduced to the first reference frequency f1 or than first when operating frequency Yield value is big relative to the change of the change of operation frequency value during the value of reference frequency f1 smallers, and when operating frequency reaches Two reference frequency f2 or gain can be too small relative to the change of the change of operating frequency during the value than the second reference frequency f2 biggers, Therefore wireless power transmitter 1 is not easily controlled so that wireless power receiver 2 receives suitable electricity.

In the case where considering above-mentioned aspect, when wireless power transmitter 1 operates in the normal mode, first with reference to frequency Rate f1 and the second reference frequency f2 are determined so that yield value becomes in term of reference relative to the change of operation frequency value Change.That is, with reference to curve map shown in Fig. 6, the first reference frequency f1 is confirmed as such frequency：In minimum frequency In the range of f_min to peak frequency f_max, yield value is predetermined at the frequency relative to the change of the change of frequency values Maximum.Second reference frequency f2 is confirmed as such frequency：Scope in minimum frequency f_min to peak frequency f_max Interior, yield value is predetermined minimum value at the frequency relative 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 as described above The damage of element in wireless power receiver 2 and/or overheat, and precisely control and be sent to wireless power receiver Electric power.

First reference frequency f1 and the second reference frequency f2 can be determined by experiment and preset, or can be exterior defeated Enter.Alternatively, after the operation of wireless power transmitter 1, set in wireless power transmitter 1 or change the first reference frequency F1 and the second reference frequency f2.In order to set or change the first reference frequency f1 and the second reference frequency f2, wireless power is sent Device 1 can also carry out predetermined algorithm, and can also therefore include other hardware configuration.

In addition, as shown in fig. 6, voltage gain has maximum at resonant frequency f_r.Resonant frequency f_r is below will The resonant frequency of the resonator for the wireless power transmitter to be described.In this case, minimum frequency f_min is resonant frequency About the 110% of f_r, peak frequency f_max are about the 150% of resonant frequency f_r.

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

Circuit unit 100 is provided with the input voltage vin from input power 300, and in response at least one control Signal con wirelessly sends electric power.The electricity and frequency wirelessly sent is changed by control signal con.

Input voltage vin is converted into exchange (AC) voltage Vac by converter 110 in response to control signal con, and is exported and turned The AC voltages changed.The amplitude and frequency of AC voltages Vac is determined based on control signal con.For example, the amplitude of AC voltages Vac is based on The duty cycle of control signal con is determined (when there are during multiple control signal con, some or all of control signal con's accounts for The empty amplitude than definite AC voltages Vac).In addition, frequency of the frequency based on control signal con of AC voltages Vac determines (to work as presence During multiple control signal con, the frequency of some or all of control signal con determines the frequency of AC voltages Vac).

The frequency of AC voltages Vac can be more than the resonant frequency f_r (Fig. 6) of resonator 120.For example, the frequency of AC voltages Vac Also can be determined to be between about 110% to about the 150% of the resonant frequency f_r (Fig. 6) of resonator 120.

Converter 110 can be realized according to various forms.For example, converter 110 may also comprise boost converter and inverter, Also can only include inverter, and may also comprise perform boost converter function and inverter function both boosting inversion Device.

Resonator 120 is provided AC voltage Vac, and sends and be used to determine the signal that wireless power receiver 2 whether there is (such as simulating ping signals or numeral ping signals).Resonator 120 based on AC voltages Vac by changing surrounding magnetic field come wireless Ground sends signal and/or electric power.Resonator 120 may include resonant capacitor and resonance coil, and the resonance frequency of resonator 120 Rate f_r (Fig. 6) can be determined by the capacitance of resonant capacitor and the inductance of resonance coil.

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 Represent the electricity needed for wireless power receiver 2.For example, request signal req can be that request is wireless by wireless power transmitter 1 The signal for the electricity increase that ground is sent, or can be the signal for asking electricity to reduce.Alternatively, request signal req can also It is the poor signal between the electricity for representing the electricity and wireless power receiver actual received needed for wireless power receiver. Controller 200 is determined increase or is reduced the electricity sent based on request signal req, and correspondingly adjusts control signal The operation duty cycle and operating frequency of con.

For example, controller 200 adjusts operating frequency in the normal mode.Under boost mode or decompression mode, controller 200 adjustment duty cycles or adjustment operation both duty cycle and operating frequency.For example, in the normal mode, when wireless power connects When receiving the increase of the distance between device 2 and wireless power transmitter 1, controller 200 reduces frequency, and when the distance reduces, Controller 200 increases frequency.Under boost mode or decompression mode, when wireless power receiver 2 and wireless power transmitter 1 it Between distance increase when, controller 200 increases duty cycle, and when the distance reduces, the reduction duty cycle of controller 200.

As an example, when operating frequency corresponds to minimum reference frequency and performs Normal Mode Operation, if request letter Number req request electricity increase, then controller 200, which performs control to, makes operator scheme be switched to boost mode from normal mode.

As another example, when operating duty cycle corresponding to minimum reference duty cycle and performing boost mode operation, such as Fruit request signal req request electricity reduces, then controller 200, which performs control to, makes operator scheme be switched to normally from boost mode Pattern.

Below with reference to Figure 16 to Figure 46 descriptions according to the controller 200 of further embodiment and controller 201-208 Concrete operations.

As shown in fig. 7, controller 200 includes at least one processor 200a.According to embodiment, controller 200 further includes Memory 200b.Processor 200a may include central processing unit (CPU), graphics processing unit (GPU), microprocessor, special Integrated circuit (ASIC) and/or field programmable gate array (FPGA) and there can be multiple cores.Memory 200b can be easy The property lost memory (for example, random access memory (RAM)), nonvolatile memory are (for example, read-only storage (ROM) or sudden strain of a muscle Deposit) or combinations thereof.The program of instruction including being configured as performing wireless power sending method is storable in memory.

Controller 200 may include gate drivers.Alternatively, wireless power transmitter 1 individually comprise for be based on by The control signal con that controller 200 provides drives the gate drivers for the switch being included in converter 110.

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

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

Circuit unit 101, converter 111, resonator 121, the function of controller 201 and input power 300 are distinguished substantially With the function phase of the circuit unit 100 described in Fig. 7, converter 110, resonator 120, controller 200 and input power 300 Together.

The amplitude of voltage (that is, boost voltage) of the amplitude of AC voltages based on section point N2 exported from converter 111 Determine.The amplitude of boost voltage Vboost is determined by formula 1.

[formula 1]

Vboost=Vin/ (1-D)

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

The duty cycle of boost mode is more than the duty cycle of normal mode.Therefore, the boost voltage under boost mode is more than Boost voltage in the normal mode, therefore, the electricity sent under boost mode by wireless power transmitter 1-1 are more than The electricity sent under 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 Vinv (t) is pressed to be determined by formula 2.

[formula 2]

Vinv (t)=2 (Vin/ (1-D)) sin (ω t/ π)

In formula 2, ω 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 making input voltage boosting acquisition by converter 111.First switch Element Q11 is switched on and off in response to first control signal con11, and second switch element Q21 is in response to second control signal Con21 is switched on and off.In addition, first switching element Q11 and second switch element Q21 are switched on and off complimentary to one anotherly.

In other words, converter 111 includes bridge circuit, and bridge circuit includes being one another in series and the first switch of blocked operation member Part Q11 and second switch element Q21.A terminal of inductor L11 is connected to a terminal of input power 300, inductor The another terminal of L11 is connected to the connection terminal (node N1) between first switch and second switch.The one of output capacitor C11 A terminal is connected to a terminal of half-bridge circuit, and the another terminal of output capacitor C11 is connected to the another of input power 300 The another terminal of terminal and half-bridge circuit.

That is, converter 111 performs accounting for based on control signal con11 and con21 as boost converter at the same time Sky ratio makes input voltage boost to the function of boost voltage, and the work(that D/C voltage is converted to AC voltages is performed as inverter Energy.Specifically, switch element Q11 and Q21, the first capacitor C11 and first coil L11 operations are boost converter.In addition, open Element Q11 and Q21 is closed also to operate as inverter.In other words, converter 111 includes having boost converter and inverter each other With reference to and be used in conjunction with the boosting inverter of the form of switch element Q11 and Q21.

More specifically, the switching manipulation of the switch element Q11 and Q21 by constructing half-bridge circuit make charge accumulation first In capacitor C11 so that the voltage at the first capacitor C11 both ends is changed into the input voltage by making to be provided by input power 300 The boost voltage for boosting and obtaining, the amplitude of boost voltage are determined by the duty cycle of control signal con11 and con21.In addition, By using in the first capacitor C11 by construct half-bridge circuit switch element Q11 and Q21 switching manipulation and the liter accumulated The AC voltages that piezoelectricity pressure produces are applied to the both ends of resonator 121.The amplitude of AC voltages determined by the amplitude of boost voltage, The frequency of AC voltages is determined by the frequency of control signal con11 and con21.

Pattern of the switching manipulation of switch element Q11 and Q21 based on wireless power transmitter 1-1 and 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 Sense determines.That is, the inductance of the capacitance of the second capacitor C21 and the second coil L21 are according to use wireless power transmitter The general environment (for example, wireless power transmission standard) of 1-1 determines.The frequency range of control signal con11 and con21 are based on Determined in response to the resonant frequency of definite capacitance and inductance.

Controller 201 is in response to request signal req output control signals con11 and con21.Controller 201 is in response to asking Seek the duty cycle and/or frequency of signal req adjustment control signals con11 and con21.

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

Circuit unit 102, converter 112, resonator 122, the function of controller 202 and input power 300 are distinguished substantially With the function phase of the circuit unit 100 described in Fig. 7, converter 110, resonator 120, controller 200 and input power 300 Together.In addition, the operation and configuration of resonator 122 are 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 is inputted with applying 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 obtains input voltage boosting.First switching element Q12 is in response to first control signal Con12 is switched on and off, and second switch element Q22 is switched on and off in response to second control signal con22.In addition, first opens Element Q12 and second switch element Q22 is closed to switch on and off complimentary to one anotherly.

The operation of converter 112 is can easily understand that with reference to the operation of the converter 111 described in Fig. 8, in addition, as schemed Shown in 9, converter 112 includes the half-bridge circuit Q12 and Q22 for performing two functions of boost converter and inverter.That is, Converter 112 includes boost converter and inverter, and boost converter and inverter share switch element Q12 and Q22.

Since converter 112 includes being used to prevent from flowing to the terminal for applying input voltage from boost node (section point N2) Reverse current diode D, it is therefore prevented that being operated by the complementary switch of first switching element Q12 and second switch element Q22 Caused ripple.

Figure 10 be schematically show it is according to the embodiment including the wireless power of circuit unit 103 and controller 203 send The diagram of the configuration of device 1-3.Circuit unit 103 includes 113 resonator 123 of converter.Converter 113 includes 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 unit 103, converter 113, resonator 123, the function of controller 203 and input power 300 are distinguished substantially With the function phase of the circuit unit 100 described in Fig. 7, converter 110, resonator 120, controller 200 and input power 300 Together.In addition, the configuration and operation of resonator 123 are 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 that the boosting for obtaining input voltage boosting by converter 113 is electric Pressure.First switching element Q13 is switched on and off in response to first control signal con13, and second switch element Q23 in response to Second control signal con23 is switched on and off.In addition, first switching element Q13 and second switch element Q23 connect complimentary to one anotherly On and off is opened.

The operation of converter 113 is can easily understand that with reference to the operation of the converter 111 described in Fig. 8, in addition, such as Shown in Figure 10, converter 113 includes the half-bridge circuit Q13 and Q23 for performing two functions of boost converter and inverter.Namely Say, converter 113 includes boost converter and inverter, and boost converter and inverter share switch element Q13 and Q23.

Converter 113 improves initial operation performance by making the initial voltage of the first capacitor C13 become input voltage. 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 be schematically show it is according to the embodiment including the wireless power of circuit unit 104 and controller 204 send The diagram of the configuration of device 1-4.Circuit unit 104 includes 114 resonator 124 of converter.Converter 114 includes switch element Q14, Q24, Q34 and Q44, first coil L14 and the first capacitor C14.Resonator 124 includes the second capacitor C24 and second Coil L24.

Circuit unit 104, converter 114, resonator 124, the function of controller 204 and input power 300 are distinguished substantially With the function phase of the circuit unit 100 described in Fig. 7, converter 110, resonator 120, controller 200 and input power 300 Together.In addition, the configuration and operation of resonator 124 are identical with the construction of the resonator 121 described in Fig. 8 and operation.

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 nodes.First capacitor C14 is connected between section point N2 and ground nodes.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 boosting obtains.First switching element Q14 is switched on and off in response to first control signal con14. Second switch element Q24 is switched on and off in response to second control signal con24.3rd switch element Q34 is in response to the 3rd control Signal con34 processed is switched on and off.4th switch element Q44 is switched on and off in response to the 4th control signal con44.In addition, First switching element Q14 and second switch element Q24 are switched on and off complimentary to one anotherly, and the 3rd switch element Q34 and the 4th is opened Element Q44 is closed to switch on and off complimentary to one anotherly.3rd switch element Q34 can be remained off, or can be with second The sequential that the sequential of switch element Q24 is identical switches on and off, and the 4th switch element Q44 can be remained turned on, or can be with Switched on and off with the sequential identical with the sequential of first switching element Q14.

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

That is, converter 114 is embodied as full-bridge circuit.In some cases, the 3rd switch element Q34 is remained open State and the 4th switch element Q44 is remained turned on so that converter is operated according to the mode identical with half-bridge circuit, and And the 3rd switch element Q34 switched on and off with the sequential identical with second switch element Q24, the 4th switch element Q44 with Sequential identical first switching element Q14 switches on and off so that converter 114 is grasped according to the mode identical with full-bridge circuit Make.In some cases, the 3rd switch element Q34 and the 4th switch element Q44 with respectively with second switch element Q24 and first The sequential that the sequential of switch element Q14 is different is respectively turned on and disconnects, and it is full-bridge circuit that converter 114, which also operates,.

Figure 11 illustrates embodiment in, first coil L14, the first capacitor C14, first switching element Q14 and Two switch element Q24 operations are boost converter, and first switching element Q14, second switch element Q24, the 3rd switch are first Part Q34 and the 4th switch element Q44 operations are inverter.That is, first switching element Q14 and second switch element Q24 Operate as boost converter, and operation is inverter at the same time.In other words, boost converter and inverter share first switch member Part Q14 and second switch element Q24 is simultaneously 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 (ω t/ π)

In formula 3, Vin is the voltage magnitude of the electric power inputted from input power 300, and D is second control signal con24's Duty cycle, the frequency of ω signal con14, con24, con34 and con44 in order to control.

That is, according to the embodiment of Figure 11, compared with half-bridge circuit, due to obtaining the effect with twice of input voltage Identical effect, therefore reduce the current stress of coil, and also improve efficiency.

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

Circuit unit 105, converter 115, resonator 125, the function of controller 205 and input power 300 are distinguished substantially With the function phase of the circuit unit 100 described in Fig. 7, converter 110, resonator 120, controller 200 and input power 300 Together.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 nodes.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 nodes.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 that the boosting for obtaining input voltage boosting by converter 115 is electric Pressure.First switching element Q15 is switched on and off in response to first control signal con15.Second switch element Q25 is in response to second Control signal con25 is switched on and off.3rd switch element Q35 is switched on and off in response to the 3rd control signal con35.4th Switch element Q45 is switched on and off in response to the 4th control signal con45.In addition, first switching element Q15 and second switch member Part Q25 is switched on and off complimentary to one anotherly, and the 3rd switch element Q35 and the 4th switch element Q45 connect on and off complimentary to one anotherly Open.3rd switch element Q35 can be remained off, or can be with the sequential identical with the sequential of second switch element Q25 Switch on and off, the 4th switch element Q45 can be remained turned on, or can be with the sequential phase with first switching element Q15 Same sequential switches on and off.

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 and the 4th switch element Q45 is remained turned on so that converter is operated according to the mode identical with half-bridge circuit； 3rd switch element Q35 is switched on and off with the sequential identical with the sequential of second switch element Q25, the 4th switch element Q45 Switched on and off with the sequential identical with the sequential of first switching element Q15 so that converter 115 is according to identical with full-bridge circuit Mode operate.In some cases, the 3rd switch element Q35 and the 4th switch element Q45 with respectively with second switch element Sequential different with the sequential of first switching element Q15 Q25 are respectively turned on and disconnect, and it is full-bridge that converter 115, which also operates, Circuit.

Figure 12 illustrates embodiment in, first coil L15, tertiary coil L35, 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, and First switching element Q15, second switch element Q25, the 3rd switch element Q35 and the 4th switch element Q45 operations are inverter. That is, first switching element Q15, second switch element Q25, the 3rd switch element Q35 and the 4th switch element Q45 operations For boost converter, and operation is inverter at the same time.In other words, boost converter and inverter share first switching element Q15, second switch element Q25, the 3rd switch element Q35 and the 4th switch element Q45 are simultaneously bonded to each other.

Embodiment in Figure 12, since converters operation is full-bridge circuit, obtains and two times compared with half-bridge circuit Input voltage the identical effect of effect, therefore reduce the current stress of coil, can also improve efficiency.Further, since the 3rd Switch element Q35 and the 4th switch element Q45, which is additionally aided, makes input voltage boost, and therefore, can also make have relatively low capacitance Capacitor is used as the first capacitor Q 15.

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

Circuit unit 106, converter 116, resonator 126, the function of controller 206 and input power 300 are distinguished substantially With the function phase of the circuit unit 101 described in Fig. 8, converter 111, resonator 121, controller 201 and input power 300 Together.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 is connected in series in the terminal and first node N1 for applying input voltage Between.First switching element Q16 is connected between first node N1 and section point N2.Second switch element Q26 is connected to Between one node N1 and ground terminal.First capacitor C16 is connected between section point N2 and ground terminal.Diode D connects It 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 segment Point N1.The voltage of section point N2 is the boost voltage for making input voltage boosting acquisition by converter 116.First switching element Q16 is switched on and off in response to first control signal con16.Second switch element Q26 connects in response to second control signal con26 On and off is opened.5th switch element Q56 is switched on and off in response to the 5th control signal con56.In addition, first switching element Q16 and second switch element Q26 are switched on and off complimentary to one anotherly.

The operation of converter 111 described in reference Fig. 8, it can be readily appreciated that the operation of converter 116.In addition, as schemed Shown in 13, converter 116 includes the half-bridge circuit Q16 and Q26 for performing two functions of boost converter and inverter.Namely Say, converter 116 includes boost converter and inverter, and boost converter and inverter share first switching element Q16 and Two switch element Q26.

Amplitudes of the 5th switch element Q56 based on the input voltage inputted from input power 300 switches on and off.For example, When the amplitude of input voltage is reference value or smaller, the 5th switch element Q56 is connected, when the amplitude of input voltage is more than reference During value, the 5th switch element Q56 is disconnected.When the 5th switch element Q56 is disconnected, converter 116 does not have boost converter Function, only has the function of inverter.

Therefore, according to the embodiment of Figure 13, since the function of converter 116 changes according to the amplitude of input voltage, because This more effectively sends electric power.

Although being not shown, the 5th switch element Q56 can be also added in the embodiment of Fig. 8, Figure 10, Figure 11 and Figure 12 Each embodiment in.In addition, the diode D of Fig. 9 can be also added in the embodiment of Figure 11 and Figure 12.In addition, according to figure First capacitor C14 and C15 of the embodiment of 11 and Figure 12 can be according to the first capacitor C13 phases with the embodiment according to Figure 10 Same mode is attached.

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

Circuit unit 107, converter 117, resonator 127, the function of controller 207 and input power 300 are distinguished substantially With the function phase of the circuit unit 100 described in Fig. 7, converter 110, resonator 120, controller 200 and input power 300 Together.In addition, the configuration and operation of resonator 127 are 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 with 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 making input voltage boosting acquisition by converter 117.First switching element Q17 in response to First control signal con17 is switched on and off.Second switch element Q27 is switched on and off in response to second control signal con27. 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 is opened Element Q27 is closed to switch 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 It is to say, duty cycle or adjustment first of the electricity received by wireless power receiver by adjusting the 6th switch element Q67 The operating frequency of switch 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 operations are boosting Converter, first switching element Q17 and second switch element Q27 operations are inverter.That is, the boosting of converter 117 Converter and inverter are similar with the boost converter and inverter shown in Figure 14.

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

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

Circuit unit 108, converter 118, resonator 128, the function of controller 208 and input power 300 are distinguished substantially With the function phase of the circuit unit 100 described in Fig. 7, converter 110, resonator 120, controller 200 and input power 300 Together.In addition, the configuration and operation of resonator 128 are 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 nodes.3rd capacitor C38 is connected to section point N2 and ground connection Between node.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 is in response to first control signal con18 Switch on and off.Second switch element Q28 is switched on and off in response to second control signal con28.3rd switch element Q38 is rung Tri- control signal con38 of Ying Yu are switched on and off.4th switch element Q48 in response to the 4th control signal con48 connect and Disconnect.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 can be remained off, Huo Zheke To be switched on and off with the sequential identical with the sequential of second switch element Q28, the 4th switch element Q48 can remain up shape State, or can be switched on and off with the sequential identical with the sequential of first switching element Q18.In some cases, the 3rd open Element Q38 and the 4th switch element Q48 is closed with different from the sequential of second switch element Q28 and first switching element Q18 respectively Sequential be respectively turned on and disconnect.

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

The wireless power transmitter 1 that Fig. 7 is shown into Figure 15 is grasped to 1-8 with detection pattern and electric power sending mode Make.Electric power sending mode includes two or more in normal mode, boost mode and decompression mode.

Whether detection pattern (is used to determine exterior object close to wireless power transmitter or just close exterior object Whether be wireless power receiver pattern) it is corresponding with above-mentioned simulation ping stages and numeral ping stages.

In detection pattern, whether wireless power transmitter is sent is used to determine exterior object in close simulation ping signals And for determine just close object whether be wireless power receiver digital ping signals.In this case, as above It is described, after wireless power transmitter periodically sends simulation ping signals, wireless power transmitter 1,1-1,1-2,1- 3rd, 1-4,1-5,1-6,1-7 or 1-8 send numeral ping signals, or the week based on setting when definite exterior object is just close Phase sends numeral ping signals.

Hereinafter, for convenience of explanation, wireless power transmitter 1,1-1,1-2,1-3,1- are passed through in a detection mode 4th, the simulation ping signals and numeral ping signals that 1-5,1-6,1-7 or 1-8 are sent are referred to as ping signals.

Detection pattern includes such as first mode and second mode.First mode with abort state continue the reference time or Longer time after start send ping signals operation (the wireless power transmitter such as powered off is switched to on-state Situation) initial mode of operation it is corresponding.Second mode is corresponding with standby operating mode, and the standby operating mode is used for Time of the ping signals continuously less than the reference time is sent after initial mode of operation under abort state.

In initial mode of operation, converter 111,112,113,114,115,116 or 117 (Fig. 8 to Figure 14) gradually makes defeated Enter boost in voltage, and step-up power is stored in first capacitor C11, C12, C13, C14, C15, C16 or C17 (Fig. 8 to figure 14) in.Converter 111,112,113,114,115,116 or 117 is eliminated by alternately by making input voltage gradually boost The problem of ground carries out causing predetermined ripple in the step-up power of switch generation.

Input voltage provided to converter 111,112,113,114,115,116 by gradually increasing from the first duty cycle or The signal of 117 switch element Q21, Q22, Q23, Q24, Q25 (and/or Q45), Q26 or Q67 (Fig. 8 to Figure 14) account for Sky is than carrying out gradual boosting., it is understood that the gradual increase of duty cycle mean duty cycle from particular duty cycle repeatedly and Sequentially increase refers to duty cycle.

As an example, the first duty cycle and the duty cycle increase from 0% are corresponding with reference to the duty cycle of duty cycle.According to reality Apply example, the first duty cycle is disposed proximate to 0% duty cycle, with prevent input electric power abort state continue the reference time or The stage rapid pressure started after longer time in operation, so as to effectively eliminate caused predetermined ripple in step-up power Problem.

Defeated to make by making duty cycle sequentially increase with reference to duty cycle from the first duty cycle of the duty cycle close to 0% In the operation for entering boost in voltage, converter (or controller) calculate with the voltage level of step-up power that gradually boosts and with electricity The related data of the corresponding duty cycle of voltage levels.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)) calculate with the voltage water of the step-up power gradually to boost The flat and data related with the corresponding duty cycle of voltage level are storable in single memory element.

In addition, when the liter being stored in first capacitor C11, C12, C13, C14, C15, C16 or C17 (Fig. 8 to Figure 14) When the voltage level of piezoelectric forces reaches the voltage level of target step-up power, converter 111,112,113,114,115,116 or 117 output AC voltages (or alternating current), to be sent out by resonator 121,122,123,124,125,126 or 127 (Fig. 8 to Figure 14) Send ping signals.

In the case of various voltage levels are provided by input power 300, converter 111,112,113,114, 115th, 116 or 117 input voltage can still be boosted to target boost voltage.Therefore, become even in the voltage level of input voltage In the case of change, input voltage can still be boosted to the target liter of setting by converter 111,112,113,114,115,116 or 117 Piezoelectricity 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 the operation of initial mode of operation operational flowchart.

With reference to Figure 16, in initial mode of operation, S1110, controller 201,202,203,204,205,206,207 are being operated Or 208 determine current duty cycle whether the duty cycle for being 0%.If it is determined that the duty cycle currently set as 0%, is then operating Duty cycle is set as that the duty cycle increase from 0% refers to the first duty cycle of duty cycle by S1120.If it is determined that currently set Duty cycle is not 0%, then makes to be compared to each other between step-up power and target step-up power in operation S1130, if based on boosting Comparison between electric power and target step-up power determines that step-up power is not reaching to target step-up power, then makes in operation S1140 Duty cycle increase refers to duty cycle, gradually to make the step-up power boost.On the other hand, if based on step-up power and target Comparison between step-up power determines that step-up power reaches target step-up power, then makes current duty cycle and pole in operation S1150 Limit duty cycle is compared to each other.Limit duty cycle is corresponding with the maximum duty cycle that detection pattern allows.By being set in detection pattern Determine limit duty cycle, prevent from sending the excessive power consumption of ping signals, and eliminate problems of excessive heat.If based on current duty cycle Comparison between limit duty cycle determines that current duty cycle is higher than limit duty cycle, then is operating S1160 by limit duty cycle It is stored as and the corresponding ping duty cycles of target step-up power, if it is determined that current duty cycle is less than limit duty cycle, then exists Current duty cycle is stored as and the corresponding ping duty cycles of target step-up power by operation S1170.Then, S1180 is being operated, Ping signals are sent using target step-up power, and terminate initial mode of operation.Then, after initial mode of operation terminates, Based on wireless power receiver 2 (Fig. 1) for the response signal of the ping signals sent in initial mode of operation, wireless power hair Send device 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 to enter standby operating mode, or enter electric power sending mode.

In standby operating mode, converter 111,112,113,114,115,116 or 117 (or controller 201,202, 203rd, 204,205,206,207 or 208) duty cycle is gradually increased from the second duty cycle, so that input voltage boosts.Converter from Second duty cycle gradually increases duty cycle, to be substantially reduced the surge current as caused by changing quick voltage, so as to reduce standby (standby) electric power.In addition, converter 111,112,113,114,115,116 or 117 prevents peak point current to be input to resonance Device, to reduce the noise of wireless power transmitter.

Voltage level based on current boost electric power determines the second duty cycle.

In standby operating mode, first capacitor C11, C12, C13, C14, C15, C16 or C17 (Fig. 8 to Figure 14 is stored in In it is each) in step-up power based on send ping signals cycle discharge so that the voltage level of step-up power by It is decrescence small.By consider based on send ping signals time interval release be stored in first capacitor C11, C12, C13, C14, The electricity of step-up power in C15, C16 or C17 determines the second duty cycle.Second duty cycle is higher than the first duty cycle.

As an example, the electricity for the step-up power being stored in first capacitor C11, C12, C13, C14, C15, C16 or C17 Voltage levels are directly detected by single detecting element.The corresponding duty cycle of voltage level with the step-up power of detection can quilt It is determined as the second duty cycle.

In another example, the voltage level based on the phase estimate step-up power for sending ping signals.Specifically, when When the cycle of ping signals is determined, carried out due to the voltage level of step-up power based on the time interval for sending ping signals 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 estimating The corresponding duty cycle of voltage level of the step-up power of meter 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 related data of the corresponding duty cycle of voltage level can be stored in single memory element.In this case, base In the step-up power with being stored in initial mode of operation voltage level and with the voltage level of step-up power is corresponding accounts for Sky determines the second duty cycle than related data.

According to embodiment, by being compared the voltage level of voltage level and current boost electric power of target step-up power Compared with Weighted Index is calculated, by the way that the Weighted Index of calculating is calculated applied to ping duty cycles corresponding with target step-up power Second duty cycle.In this case, Weighted Index can have the value more than 0 but less than 1.The embodiment is applied to only target The voltage level of step-up power and it is stored in the corresponding ping duty cycles of voltage level of target step-up power in first Situation in the data of beginning operator scheme storage.In initial mode of operation, do not store whole voltage levels of step-up power with And multiple ping duties corresponding thereto.That is, the only voltage level of target step-up power and corresponding thereto Ping duty cycles are stored, so as to reduce the size of memory element.

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 be applied to initial mode of operation storage step-up power whole voltage levels and with its phase The situation of corresponding ping duties.In this case, whole voltage levels of step-up power and ping corresponding thereto Duty is stored in data in the form of a lookup table, and is removed in standby operating mode using look-up table and calculated operation Bear (load).

Converter 111,112,113,114,115,116 or 117 (or controller 201,202,203,204,205,206, 207 or 208) gradually increase duty cycle from the second duty cycle, gradually to make input voltage boost.Gradually increase and reach in duty cycle In the case of ping duty cycles, since the voltage level for the step-up power being stored in the first capacitor reaches target boosting electricity The voltage level of power, therefore, converter 111,112,113,114,115,116 or 117 export 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 operational flowchart of operation of the wireless power sending method under standby operating mode.

With reference to Figure 17, in standby operating mode, S1210, controller 201,202,203,204,205,206,207 are being operated Or 208 determine current duty cycle whether the duty cycle for being 0%.If it is determined that the duty cycle currently set as 0%, is then operating Duty cycle is set as the second duty cycle by S1220.Second duty cycle is higher than the first duty cycle, as an example, by the way that weighting is referred to Number is applied to ping duty cycles and calculates the second duty cycle.In this case, Weighted Index is the value more than 0 but less than 1.

If not being 0% in the duty cycle that operation S1210 determines currently to set, make current duty cycle in operation S1230 With being compared to each other in the ping duty cycles that initial mode of operation calculates and stores.As between current duty cycle and ping duty cycles Comparative result, if it is determined that current duty cycle is less than ping duty cycles, then operation S1240 make duty cycle increase refer to duty Than gradually to make step-up power boost.Alternatively, if determining that current duty cycle is higher than ping duty cycles in operation S1230, Duty cycle limit is made as ping duty cycles in operation S1250, send ping duty cycles in operation S1260, and terminate standby operation Pattern.Thereafter, the response signal based on wireless power receiver 2 for ping signals, wireless power transmitter 1,1-1,1-2, 1-3,1-4,1-5,1-6,1-7 or 1-8 enter electric power sending mode.

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

With reference to Figure 18, in initial mode of operation, (Fig. 7 is extremely for converter 111,112,113,114,115,116,117 or 118 Figure 15) (or controller 201,202,203,204,205,206,207 or 208 (Fig. 7 to Figure 15)) is gradual from the first duty cycle Increase duty cycle, gradually to make input voltage boost.As converter 110,111,112,113,114,115,116,117 or 118 boosting is as a result, when the boosting for being stored in first capacitor C11, C12, C13, C14, C15, C16 or C17 (Fig. 8 to Figure 14) When electric power reaches target step-up power, ping signals are sent in sequential t1.After ping signals are sent, terminate initial operation mould Formula, and wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 is entered standby operating mode.

In standby operating mode, the boosting electricity being stored in first capacitor C11, C12, C13, C14, C15, C16 or C17 The voltage level of power is reduced based on the cycle for sending ping signals.Converter 111,112,113,114,115,116,117 or 118 (or controllers 201,202,203,204,205,206,207 or 208) are based on the boosting electricity being stored in the first capacitor The voltage level of power gradually increases duty cycle in sequential t2 from the second duty cycle, so that input voltage boosts, also, as conversion The boosting of device is sent as a result, when the step-up power in being stored in the first capacitor reaches target step-up power in sequential t3 Ping signals.In this case, the sending cycle based on ping signals repeats aforesaid operations, and the sending cycle is sequential t3 To the time interval of sequential t5 or the time interval of sequential t5 to sequential t7.Then, based on wireless power receiver 2 to ping The response signal of signal, wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 enter electric power and send mould Formula.

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

Figure 19 is shown when the electricity received under electric power sending mode by wireless power receiver 2 increases based on real Apply the operation of the wireless power transmitter 1 of example, 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and radio communication method Oscillogram.The oscillogram of Figure 19 represents to be used to control wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 Or the waveform of the control signal of the switch element of 1-8.

First of first control signal con11, con12, con13 and con16 equivalent to Figure 19 of Fig. 8 to Figure 10 and Figure 13 Second control signal con21, con22, con23 and con26 of control signal con1, Fig. 8 to Figure 10 and Figure 13 are equivalent to Figure 19 Second control signal con2.

In addition, first of first control signal con14, con15 and con18 equivalent to Figure 19 of Figure 11, Figure 12 and Figure 15 Control signal con1.Second of second control signal con24, con25 and con28 equivalent to Figure 19 of Figure 11, Figure 12 and Figure 15 Control signal con2.In this case, the 3rd control signal con34, con35 and con38 of Figure 11, Figure 12 and Figure 15 are kept In low level.The 4th control signal con44, con45 and con48 of Figure 11, Figure 12 and Figure 15 are maintained at high level.

The form shown in (a) and (b) of the control signal that normal mode initially exports with such as Figure 19.This In the case of, the frequency and duty cycle of control signal are ping frequencies as described above and ping duty cycles.(a) and shown in (b) Control signal also detection pattern export.

In normal mode, according to the frequency from 2 received signal of wireless power receiver adjustment control signal.Namely Say, in the case of the electricity that the electricity received as wireless power receiver 2 is less than needed for wireless power receiver 2, normal Pattern, controller 200,201,202,203,204,205,206,207 or 208 reduce the control as shown in (c) and (d) of Figure 19 The frequency of signal con1 and con2.Therefore, the electricity received by wireless power receiver 2 increases.(c) and (d) control signal The frequency of con1 and con2 can be the minimum value f1 (Fig. 6) of normal mode lower frequency.In the normal mode, duty cycle is fixed as State ping duty cycles.

In boost mode, based on the duty cycle from 2 received signal of wireless power receiver adjustment control signal.Namely Say, as shown in (e) and (f) of Figure 19, even if when the frequency of control signal con1 and con2 are reduced to predetermined reference frequency (example Such as, the f1 of Fig. 6) still without the electricity needed for wireless power receiver is received when, controller 200,201,202,203,204, 205th, 206,207 or 208 the frequency of control signal con1 and con2 are fixed as the reference frequency (for example, f1 of Fig. 6), and Increase the duty cycle of second control signal con2.

Alternatively, as shown in (g) and (h) of Figure 19, in boost mode, controller 200,201,202,203,204,205, 206th, 207 or 208 frequency for additionally reducing control signal con1 and con2.In this case, duty cycle is fixed to pre- The duty cycle first increased.

Figure 20 is to show the electricity according to the embodiment worked as and received under electric power sending mode by wireless power receiver 2 The operation of wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and radio communication method during increase Diagram.The oscillogram of Figure 20 represents to be used to control wireless power transmitter 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 Switch element control signal waveform.

First control letters of first control signal con14, con15 and the con18 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 20 Number con1.Second control letters of second control signal con24, con25 and the con28 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 20 Number con2.Threeth control letters of the 3rd control signal con34, con35 and the con38 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 20 Number con3.Fourth control letters of the 4th control signal con44, con45 and the con48 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 20 Number con4.

Except Figure 20 be related to converter 114,115 and 118 (Figure 11, Figure 12 and Figure 15) operation for full-bridge circuit situation it Outside, Figure 20 is similar with Figure 19.

Controller 200,201,202,203,204,205,206,207 or 208 exports the control letter shown in (a) and (b) Number.As described above, in the normal mode, controller 200,201,202,203,204,205,206,207 or 208 is also exported with such as The control signal that the form shown in (a) and (b) of Figure 20 initially exports, and also in detection pattern output control signal.(a) In the duty cycle of control signal con1 and con4 that shows be above-mentioned ping duty cycles, the control signal shown in (a) and (b) The frequency of con1, con2, con3 and con4 are above-mentioned ping frequencies.

In the normal mode, it is less than the electricity needed for wireless power receiver 2 in the electricity received as wireless power receiver 2 In the case of amount, controller 200,201,202,203,204,205,206,207 or 208 reduces institute in (c) and (d) such as Figure 20 The frequency of control signal con1, con2, con3 and con4 for showing.

Under boost mode, based on the duty cycle from 2 received signal of wireless power receiver adjustment control signal.Also To say, as shown in (e) and (f) of Figure 20, even if when the frequency of control signal con1, con2, con3 and con4 be reduced to it is predetermined During the electricity that frequency (for example, f1 of Fig. 6) is also not received by needed for wireless power receiver 2, controller 200,201,202, 203rd, 204,205,206,207 or 208 the frequency of control signal con1, con2, con3 and con4 are fixed as reference frequency (example Such as, the f1 of Fig. 6), and increase the duty cycle of second control signal con2 and the 3rd control signal con3.

Alternatively, as shown in (g) and (h) of Figure 20, under boost mode, controller 200,201,202,203,204, 205th, 206,207 or 208 frequency for additionally reducing control signal con1, con2, con3 and con4.In this case, account for The empty duty cycle than being fixed as advance increase.

Although not shown in Figure 19 and Figure 20, under boost mode, shown in (g) and (h) is additionally reduced After frequency, controller 200,201,202,203,204,205,206,207 or 208 can also additionally increase duty cycle.

Figure 21 is shown when the electricity received under electric power sending mode by wireless power receiver 2 reduces according to reality Apply the operation of the wireless power transmitter 1 of example, 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and radio communication method Oscillogram.The oscillogram of Figure 21 represents to be used to control wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 Or the waveform of the control signal of the switch element of 1-8.

First of first control signal con11, con12, con13 and con16 equivalent to Figure 21 of Fig. 8 to Figure 10 and Figure 13 Second control signal con21, con22, con23 and con26 of control signal con1, Fig. 8 to Figure 10 and Figure 13 are equivalent to Figure 21 Second control signal con2.

In addition, first of first control signal con14, con15 and con18 equivalent to Figure 21 of Figure 11, Figure 12 and Figure 15 Second of second control signal con24, con25 and con28 equivalent to Figure 21 of control signal con1, Figure 11, Figure 12 and Figure 15 Control signal con2.In this case, the 3rd control signal con34, con35 and con38 of Figure 11, Figure 12 and Figure 15 are kept In low level, the 4th control signal con44, con45 and con48 of Figure 11, Figure 12 and Figure 15 are maintained at high level.

First, the output of controller 200,201,202,203,204,205,206,207 or 208 and (a) and (b) such as Figure 21 In identical the control signal con1 and con2 of the control signal that shows.Controller 200,201,202,203,204,205,206, 207 or 208 control signals also initially exported in the form of being shown in (a) and (b) in normal mode output, and in detection pattern The output control signal identical with the control signal shown in (a) and (b).

In the case where the electricity received by wireless power receiver 2 is more than 2 electricity demands of wireless power receiver, Under normal mode, control of the increase of controller 200,201,202,203,204,205,206,207 or 208 as shown in (c) and (d) The frequency of signal con1 and con2.Therefore, the electricity received by wireless power receiver 2 reduces.(c's) and (d) of Figure 21 The frequency of control signal con1 and con2 are the maximum f2 (Fig. 6) of normal mode lower frequency.In the normal mode, duty cycle quilt It is fixed as above-mentioned ping duty cycles.

In buck mode, based on the duty cycle from wireless power receiver received signal adjustment control signal.Also It is to say, even if passing through radio when the frequency of control signal con1 and con2 increase to predetermined reference frequency (for example, f2 of Fig. 6) When the electricity that power receiver 2 receives is still greater than electricity needed for wireless power receiver 2, as shown in (e) and (f) of Figure 21, control Device 200,201,202,203,204,205,206,207 or 208 processed makes the frequency of control signal con1 and con2 be fixed as referring to Frequency (for example, f2 of Fig. 6), and reduce the duty cycle of second control signal con2.

Alternatively, as shown in (g) and (h) of Figure 21, in buck mode, controller 200,201,202,203,204, 205th, 206,207 or 208 frequency for also increasing control signal con1 and con2.In this case, duty cycle can be fixed as pre- The duty cycle first reduced.

Figure 22 is shown when the electricity received under electric power sending mode by wireless power receiver 2 reduces according to reality Apply the operation of the wireless power transmitter 1 of example, 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and radio communication method Oscillogram.The oscillogram of Figure 22 represents to be used to control wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 Or the waveform of the control signal of the switch element of 1-8.

First control letters of first control signal con14, con15 and the con18 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 22 Number con1.Second control letters of second control signal con24, con25 and the con28 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 22 Number con2.Threeth control letters of the 3rd control signal con34, con35 and the con38 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 22 Number con3.Fourth control letters of the 4th control signal con44, con45 and the con48 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 22 Number con4.

Make situation of converter 114,115 and 118 (Figure 11, Figure 12 and Figure 15) operation for full-bridge circuit except Figure 22 is related to Outside, Figure 22 is similar with Figure 21.

First, in (a) and (b) of the output of controller 200,201,202,203,204,205,206,207 or 208 and Figure 22 The control signal that shows identical control signal con1, con2, con3 and con4.Controller 200,201,202,203,204, 205th, 206,207 or 208 control signal also initially exported in the form of being shown in (a) and (b) in normal mode output, and The control signal identical with the control signal shown in (a) and (b) is also exported in detection pattern.

In the normal mode, it is more than in the electricity received by wireless power receiver 2 needed for wireless power receiver 2 In the case of electricity, in (c) and (d) of the increase of controller 200,201,202,203,204,205,206,207 or 208 such as Figure 22 The frequency of shown control signal con1, con2, con3 and con4.Therefore, the electricity received by wireless power receiver 2 subtracts It is small.(c) frequency with control signal con1, con2, con3 and the con4 of (d) (is schemed for the maximum f2 of normal mode lower frequency 6).In the normal mode, duty cycle is fixed as above-mentioned ping duty cycles.

In buck mode, based on the duty cycle from 2 received signal of wireless power receiver adjustment control signal.Also It is to say, even if the frequency in control signal con1, con2, con3 and con4 increases to predetermined reference frequency (for example, f2 of Fig. 6) During by the electricity that wireless power receiver 2 receives still greater than electricity needed for wireless power receiver 2, as Figure 22 (e) and (f) shown in, controller 200,201,202,203,204,205,206,207 or 208 by control signal con1, con2, con3 and The frequency of con4 is fixed as reference frequency (for example, f2 of Fig. 6), and reduces second control signal con2 and the 3rd control signal The duty cycle of con3.

Alternatively, as shown in (g) and (h) of Figure 22, in buck mode, controller 200,201,202,203,204, 205th, 206,207 or 208 frequency for also additionally increasing control signal con1, con2, con3 and con4.In this case, Duty cycle is fixed to the duty cycle reduced in advance.

Figure 23 is shown when the electricity received under electric power sending mode by wireless power receiver 2 reduces according to reality Apply the ripple of the operation of the wireless power transmitter 1 of example, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and radio communication method Shape figure.The oscillogram of Figure 23 represents to be used for control wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 to open Close the waveform of the control signal of element.

First control letters of first control signal con14, con15 and the con18 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 23 Number con1.Second control letters of second control signal con24, con25 and the con28 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 23 Number con2.Threeth control letters of the 3rd control signal con34, con35 and the con38 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 23 Number con3.Fourth control letters of the 4th control signal con44, con45 and the con48 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 23 Number con4.

First, in (a) and (b) of the output of controller 200,201,202,203,204,205,206,207 or 208 and Figure 23 The control signal that shows identical control signal con1, con2, con3 and con4.Controller 200,201,202,203,204, 205th, 206,207 or 208 control signal also initially exported in the form of being shown in (a) and (b) in normal mode output, and The control signal identical with the control signal shown in (a) and (b) is also exported in detection pattern.

In the case of the electricity that the electricity received by wireless power receiver 2 is more than needed for wireless power receiver 2, In the normal mode, in (c) and (d) of the increase of controller 200,201,202,203,204,205,206,207 or 208 such as Figure 23 The frequency of shown control signal con1, con2, con3 and con4.Therefore, the electricity received by wireless power receiver 2 subtracts It is small.(c) frequency with control signal con1, con2, con3 and the con4 of (d) (is schemed for the maximum f2 of normal mode lower frequency 6).In the normal mode, duty cycle is fixed as above-mentioned ping duty cycles.

In buck mode, based on the duty cycle from 2 received signal of wireless power receiver adjustment control signal.Also It is to say, even if the frequency in control signal con1, con2, con3 and con4 increases to predetermined reference frequency (for example, f2 of Fig. 6) During by the electricity that wireless power receiver 2 receives still greater than electricity needed for wireless power receiver 2, (e) such as Figure 23, (f), shown in (g) and (h), 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), the duty of fixed second control signal con2 Than, and reduce the duty cycle of the 4th control signal con4.In this case, in full-bridge circuit, dead time increase, because This, is reduced by wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 electricity sent, so as to also make to lead to The electricity for crossing the reception of wireless power receiver 2 reduces.

Alternatively, as shown in (i) and (j) of Figure 23, in buck mode, controller 200,201,202,203,204, 205th, 206,207 or 208 frequency for also increasing control signal con1, con2, con3 and con4.In this case, (e) and (f) duty cycle of control signal con1 and con2 are equal to the duty cycle of the control signal con1 and con2 of (i) and (j).In addition, Meanwhile as shown in (k) and (l) of Figure 23, the 3rd control signal con3 keeps low level, the 4th control signal con4 keeps high electricity It is flat.In this case, the operation of converter 114,115 or 118 of Figure 11,12 or 15 is half-bridge circuit so that passes through radio The electricity that power transmitter is sent reduces, so that compared with only adjusting the situation of frequency, makes to receive by wireless power receiver 2 Electricity further reduce.

(k) and (l) although of Figure 23 shows that controller 200,201,202,203,204,205,206,207 or 208 makes 3rd control signal con3 is maintained at low level, and the 4th control signal con4 is maintained at the situation of high level, still, the 3rd Second control signal con2s, fourth control signal con4 of the control signal con3 equal to (j) are also equal to the first control signal of (i) con1.That is, by increasing whole frequencies in first control signal to the 4th control signal, reduce by wireless The electric power that power receiver 2 receives.

Figure 24 is shown when the electricity received under electric power sending mode by wireless power receiver 2 reduces according to reality Apply the ripple of the operation of the wireless power transmitter 1 of example, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and radio communication method Shape figure.The oscillogram of Figure 24 represents to be used for control wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 to open Close the waveform of the control signal of element.

First control letters of first control signal con14, con15 and the con18 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 24 Number con1.Second control letters of second control signal con24, con25 and the con28 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 24 Number con2.Threeth control letters of the 3rd control signal con34, con35 and the con38 of Figure 11 to Figure 12 and Figure 15 equivalent to Figure 24 Number con3.Fourth control letters of the 4th control signal con44, con45 and the con48 of Figure 11, Figure 12 and Figure 15 equivalent to Figure 24 Number con4.

First, in (a) and (b) of the output of controller 200,201,202,203,204,205,206,207 or 208 and Figure 24 The control signal that shows identical control signal con1, con2, con3 and con4.Controller 200,201,202,203,204, 205th, 206,207 or 208 control signal also initially exported in the form of being shown in (a) and (b) in normal mode output, and The control signal identical with the control signal shown in (a) and (b) is also exported in detection pattern.

In the case of the electricity that the electricity received by wireless power receiver 2 is more than needed for wireless power receiver 2, In the normal mode, in (c) and (d) of the increase of controller 200,201,202,203,204,205,206,207 or 208 such as Figure 24 The frequency of shown control signal con1, con2, con3 and con4.Therefore, the electricity received by wireless power receiver 2 subtracts It is small.(c) frequency with control signal con1, con2, con3 and the con4 of (d) (is schemed for the maximum f2 of normal mode lower frequency 6).In the normal mode, duty cycle is fixed as 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) by the electricity that wireless power receiver 2 receives still greater than the electricity needed for wireless power receiver 2 in the case of, control Device 200,201,202,203,204,205,206,207 or 208 is operated in buck mode.In buck mode, as schemed Shown in 24 (e), (f), (g) and (h), 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 processed, and the 3rd control signal con3 is maintained at low level, the 4th control letter Number con4 is maintained at high level.In this case, the operation of converter 114,115 or 118 of Figure 11,12 and/or 15 is half-bridge Circuit so that reduced by wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 electricity sent, so that Further reduce with the electricity for making to receive by wireless power receiver 2 compared with only adjusting the situation of frequency.

Figure 25 diagrammatically illustrate wireless power transmitter 1 according to the embodiment, 1-1,1-2,1-3,1-4,1-5,1-6, Change the diagram of the process of adjustment variable in 1-7 or 1-8 and wireless power sending method.

With reference to Figure 25, in operation S2110, controller 200,201,202,203,204,205,206,207 or 208 in response to The frequency for the electric power that the request signal adjustment inputted from wireless power receiver 2 is wirelessly sent.For example, controller 200,201, 202nd, the frequency of 203,204,205,206,207 or 208 electric power wirelessly sent by adjusting the frequency adjustment of control signal. That is, in the case where wireless power receiver 2 asks larger electricity, controller 200,201,202,203,204,205, 206th, 207 or 208 reduce frequency, wireless power receiver 2 ask small electric amount in the case of, controller 200,201,202, 203rd, 204,205,206,207 or 208 increase frequency.Operation S2110 is also performed in the normal mode, can also be under boost mode Perform operation S2110.

Then, in operation S2120, determine whether the gain at the frequency of adjustment is more than reference value.In this case, Whether the frequency by determining adjustment reaches reference value, also determines whether the frequency of adjustment is more than reference value.

As the result determined in operation S2120, if it is determined that the gain at the frequency of adjustment is less than reference value, then holds Row operation S2110.

As the result determined in operation S2120, if it is determined that the gain at adjustment frequency is equal to or more than reference value, Then in the duty cycle of operation S2130 adjustment control signals.In this case, frequency can be fixed.That is, in normal mode In the case of operation S2110 is performed under formula, operator scheme is changed into boost mode.

Then, after duty cycle is adjusted upward to limiting value, additional electricity is determined whether there is in operation S2140 Power is asked.For example, after duty cycle increases to limiting value upwards, determine whether wireless power receiver asks larger electricity Amount.

As operation S2140 determine as a result, if there is additional power request, then also in operation S2150 adjustment Frequency.Operation S2150 is performed in boost mode.

Although Figure 25 shows the increased situation of electricity received by wireless power receiver 2, as an example, with figure 25 are similarly effected the operation that the electricity received by wireless power receiver 2 reduces.

Figure 26 be diagrammatically illustrate it is according to the embodiment wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5, Change the diagram of the process of adjustment variable in 1-6,1-7 or 1-8 and wireless power sending method.

With reference to Figure 26, in operation S2210, controller 200,201,202,203,204,205,206,207 or 208 in response to The duty cycle of the request signal adjustment control signal inputted from wireless power receiver 2.For example, needed in wireless power receiver 2 In the case of wanting larger electricity, controller 200,201,202,203,204,205,206,207 or 208 increases duty cycle, and In the case where wireless power receiver 2 needs small electric amount, controller 200,201,202,203,204,205,206,207 or 208 reduce duty cycle.Also operation S2210 is performed in boost mode and decompression mode.

Then, in operation S2220, determine whether the duty cycle of adjustment is less than reference value.If determine to adjust in operation S2220 Whole duty cycle is more than reference value, then performs operation S2210.

If determining to be equal to or less than reference value in the duty cycle of adjustment in operation S2220, in operation S2230 adjustment nothings The frequency of the electric power sent line.In this case, duty cycle is fixed to reference value.In addition, by adjusting control signal The frequency of electric power that wirelessly sends of frequency adjustment.For example, wireless power is passed through by the frequency reduction for increasing control signal The electricity that receiver 2 receives.In the case where operation S2210 is performed under boost mode, behaviour can be performed in the normal mode Make S2230.

Then, in operation S2240, determine whether the frequency of adjustment exceeds term of reference.

If determining that the frequency of adjustment exceeds term of reference in operation S2240, in operation S2250 adjustment duty cycles.Example Such as, if determining that the frequency of adjustment is reference value or bigger in operation S2240, frequency is made to be fixed as referring in operation S2250 It is worth and reduces duty cycle.In the case where operation S2230 is performed in the normal mode, operation can be performed in buck mode S2250.Alternatively, all operationss shown in Figure 23 are performed in buck mode.

Although Figure 26 shows the example in the case of the electricity reduction received by wireless power receiver 2, with figure The operation that the electricity received by wireless power receiver 2 increases is similarly effected in the mode shown in 26.

Figure 27 to Figure 46 be shown respectively it is true 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 The method shown using Figure 27 into Figure 46 determines operating frequency and operation duty cycle, and uses definite operating frequency and operation The control signal of duty cycle output control switch element.

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

In each figure of Figure 27 to Figure 46, operation duty cycle refers to control low side switch element (that is, Fig. 8 to Figure 13 And Figure 15 second switch element Q21, Q22, Q23, Q24, Q25, Q26 and Q28 and/or the 4th switch element Q44, Q45 and Q48) or the control signal of the switch element (that is, the 6th switch element Q67 of Figure 14) of boost converter duty cycle.Cause This, control high-side switch element (that is, first switching element Q11, Q12, Q13, Q14, Q15, Q16 of Fig. 8 to Figure 13 and Figure 15 and Q18 and/or the 3rd switch element Q34, Q35 and Q38) control signal each signal duty cycle for 100%- operate duty Compare 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, by with for setting the first reference frequency f1 shown in Fig. 6 and the second reference frequency Method setting the first reference frequency f1 and the second reference frequency f2 identical f2.In addition, also with setting the first reference frequency f1 and Second reference frequency f2 similarly sets first with reference to duty cycle d1 and second with reference to duty cycle d2.For example, by considering electric power Transmitting efficiency, wireless power transmitter 1, the member of 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power receiver 2 Part characteristic, standard or other agreements come determine first refer to the duty cycle d1 (duty cycles that can be adjusted under the first decompression mode Lower limit).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 with And element characteristic, the degree of heat, standard or other agreements of wireless power receiver 2 come determine second with reference to duty cycle d2 ( The upper limit value for the duty cycle that can be adjusted under first boost mode).Second reference frequency f2 is bigger than the first reference frequency f1, and second It is bigger with reference to duty cycle d1 than first with reference to duty cycle d2.In addition, the first reference frequency f1 is less than or equal to ping frequency f_p, the Two reference frequency f2 are greater than or equal to ping frequencies f_p.First is less than or equal to ping duty cycle d_p with reference to duty cycle d1, the Two are greater than or equal to ping duty cycles d_p with reference to duty cycle d2.In addition, the first reference frequency f1 is more than the resonance of Fig. 7 to Figure 15 The resonant frequency of device 120,121,122,123,124,125,126,127 or 128.

Figure 27 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 or the operational flowchart of operation of the wireless power sending method under electric power sending mode.

First, in operation S3101, controller 200,201,202,203,204,205,206,207 or 208 is by operating frequency F_c is set as ping frequency f_p, and operation duty cycle d_c is set as ping duty cycles d_p.Operation is performed in detection pattern S3101。

Then, it is based in operation S3201, controller 200,201,202,203,204,205,206,207 or 208 from wireless The control information that power receiver 2 receives calculates operating frequency f_c.In this case, operation duty cycle d_c is fixed to Ping duty cycles d_p.Control information is to be received with the electricity needed for wireless power receiver 2 and by wireless power receiver 2 Electricity between poor related information.

Then, in operation S3301, determine whether the operating frequency f_c calculated is more than the first reference frequency f1.

If determining that the operating frequency f_c calculated is more than the first reference frequency f1 in operation S3301, S3701 is being operated, Controller 200,201,202,203,204,205,206,207 or 208 uses the operating frequency f_c and operation duty cycle d_ calculated C produces control signal, and exports the control signal of generation.

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

After operation S3401 is performed, in operation S3701, 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 that calculate, and export the control signal of generation.

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 and operation duty cycle of the wireless power sending method under electric power sending mode.

With reference to Figure 28, first, in normal mode n, controller 200,201,202,203,204,205,206,207 or 208 In response to the control information received from wireless power receiver 2, connect by varying operating frequency f_c to adjust by wireless power Receive the electricity that device 2 receives.In this case, operation duty cycle d_c is fixed as ping duty cycles d_p.In normal mode n, behaviour Working frequency f_c changes in the range of the first reference frequency f1 to the second reference frequency f2.

Connect in the case of the first reference frequency f1 is reduced to even in operating frequency f_c by wireless power receiver 2 When the electricity of receipts is still less than electricity needed for wireless power receiver 2, controller 200,201,202,203,204,205,206, 207 or 208 operator scheme is changed into the first boost mode h1, after operating frequency f_c is fixed as the first reference frequency f1, The adjustment operation duty cycle of controller 200,201,202,203,204,205,206,207 or 208 d_c.In the first 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.

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

With reference to Figure 28, if load capacity is less than the first reference load amount R11, controller 200,201,202,203,204, 205th, 206,207 or 208 operated in normal mode n.In normal mode n, controller 200,201,202,203,204, 205th, 206,207 or 208 make operation duty cycle d_c be fixed as ping duty cycle d_p, and change operating frequency f_c.In normal mode Formula, operating frequency f_c change 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 are operated in the first boost mode h1.In 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 Boost mode h1, controller 200,201,202,203,204,205,206,207 or 208 are joined in ping duty cycles d_p to second Change operates duty cycle d_c in the range of examining duty cycle d2.

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 with And the operational flowchart of operation of the wireless power sending method under electric power sending mode.

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

Then, it is based in operation S3202, controller 200,201,202,203,204,205,206,207 or 208 from wireless The control information that power receiver 2 receives calculates operating frequency f_c.In this case, operation duty cycle d_c is fixed to Ping duty cycles d_p.Control information is to be received with the electricity needed for wireless power receiver 2 and by wireless power receiver 2 Electricity between poor related information.

Then, in operation S3502, determine whether the operating frequency f_c calculated is less than the second reference frequency f2.

If determining that the operating frequency f_c calculated is less than the second reference frequency f2 in operation S3502, S3702 is being operated, Controller 200,201,202,203,204,205,206,207 or 208 uses the operating frequency f_c and operation duty cycle d_ calculated C produces control signal, and exports the control signal of generation.

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

After operation S3602 is performed, in operation S3702, 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 that calculate, and export the control signal of generation.

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 and operation duty cycle of the wireless power sending method under electric power sending mode.

With reference to Figure 30, first, in normal mode n, controller 200,201,202,203,204,205,206,207 or 208 In response to the control information received from wireless power receiver 2, connect by varying operating frequency f_c to adjust by wireless power Receive the electricity that device 2 receives.In this case, operation duty cycle d_c is fixed as ping duty cycles d_p.

Connect in the case of the second reference frequency f2 is increased to even in operating frequency f_c by wireless power receiver 2 When the electricity of receipts is still greater than electricity needed for wireless power receiver 2, controller 200,201,202,203,204,205,206, 207 or 208 operator scheme is changed into the first decompression mode l1, after operating frequency f_c is fixed as the second reference frequency f2, The adjustment operation duty cycle of controller 200,201,202,203,204,205,206,207 or 208 d_c.

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

With reference to Figure 30, if load capacity is more than the second reference load amount R22, controller 200,201,202,203,204, 205th, 206,207 or 208 operated in normal mode n.In normal mode n, controller 200,201,202,203,204, 205th, 206,207 or 208 make operation duty cycle d_c be fixed as ping duty cycle d_p, and change 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 less than the second reference load amount R22, controller 200,201,202,203,204,205,206,207 Or 208 operated in the first decompression mode l1.In the first decompression mode l1, controller 200,201,202,203,204,205, 206th, 207 or 208 operating frequency f_c is fixed as the second reference frequency f2, and changes operation duty cycle d_c.In the first decompression Pattern l1, controller 200,201,202,203,204,205,206,207 or 208 are accounted in the references of ping duty cycles d_p to first It is empty to operate duty cycle d_c than changing in the range of 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 with And the operational flowchart of operation of the wireless power sending method under electric power sending mode.

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

Then, it is based in operation S3203, controller 200,201,202,203,204,205,206,207 or 208 from wireless The control information that power receiver receives calculates operating frequency f_c.In this case, operation duty cycle d_c is fixed to Ping duty cycles d_p.Control information is to be received with the electricity needed for wireless power receiver 2 and by wireless power receiver 2 Electricity between the related information of difference.

Then, in operation S3303, determine whether the operating frequency f_c calculated is more than the first reference frequency f1.

If determining that operating frequency f_c is less than or equal to the first reference frequency f1 in operation S3303, S3403 is being operated, Operating frequency f_c is set as the first reference frequency f1 by controller 200,201,202,203,204,205,206,207 or 208, And operation duty cycle d_c is calculated based on control information.

After operation S3403 is performed, in operation S3703, 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 that calculate, and export the control signal of generation.

Alternatively, if determining that the operating frequency f_c calculated is more than the first reference frequency f1 in operation S3303, grasping Determine whether the operating frequency f_c calculated is less than the second reference frequency f2 as S3503.

If determine that the operating frequency f_c calculated is less than the second reference frequency f2 in operation S3503, that is to say, that grasping Make values of the operating frequency f_c of S3203 calculating between the first reference frequency f1 and the second reference frequency f2, then operating S3703, controller 200,201,202,203,204,205,206,207 or 208 are accounted for using the operating frequency f_c of calculating and operation It is empty to produce control signal than d_c, and export the control signal of generation.

Alternatively, if determining that operating frequency f_c is greater than or equal to the second reference frequency f2 in operation S3503, grasping Make S3603, operating frequency f_c is set as the second reference by controller 200,201,202,203,204,205,206,207 or 208 Frequency f2, and operation duty cycle d_c is calculated based on control information.

After operation S3603 is performed, in operation S3703, 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 that calculate, and export the control signal of generation.

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 and operation duty cycle of the wireless power sending method under electric power sending mode.

With reference to Figure 32, first, in normal mode n, controller 200,201,202,203,204,205,206,207 or 208 In response to the control information received from wireless power receiver 2, connect by varying operating frequency f_c to adjust by wireless power Receive the electricity that device 2 receives.In this case, operation duty cycle d_c is fixed to ping duty cycles d_p.

Connect in the case of the first reference frequency f1 is reduced to even in operating frequency f_c by wireless power receiver 2 When the electricity of receipts is still less than electricity needed for wireless power receiver 2, controller 200,201,202,203,204,205,206, 207 or 208 operator scheme is changed into the first boost mode h1, after operating frequency f_c is fixed as the first reference frequency f1, The adjustment operation duty cycle of controller 200,201,202,203,204,205,206,207 or 208 d_c.

Below with reference to the operation that Figure 32 is described by the electricity (that is, load capacity) 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 in normal mode n.In normal mode n, controller 200, 201st, 202,203,204,205,206,207 or 208 make operation duty cycle d_c be fixed as ping duty cycle d_p, and change operation Frequency f_c.In 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 are operated in the first boost mode h1.In 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 Boost mode h1, controller 200,201,202,203,204,205,206,207 or 208 are joined in ping duty cycles d_p to second Change operates duty cycle d_c in the range of examining duty cycle d2.

If load capacity is less than the second reference load amount R23, controller 200,201,202,203,204,205,206, 207 or 208 are operated in the first decompression mode l1.In 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 Decompression mode I1, controller 200,201,202,203,204,205,206,207 or 208 are joined in ping duty cycles d_p to first Change operates duty cycle d_c in the range of examining duty cycle 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 with And the operational flowchart of operation of the wireless power sending method under electric power sending mode.

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

Then, it is based in operation S3204, controller 200,201,202,203,204,205,206,207 or 208 from wireless The control information that power receiver 2 receives calculates operating frequency f_c.In this case, operation duty cycle d_c is fixed to Ping duty cycles d_p.Control information is to be received with the electricity needed for wireless power receiver 2 and by wireless power receiver 2 Electricity between poor related information.

Then, in operation S3304, determine whether the operating frequency f_c calculated is more than the first reference frequency f1.

If determining that operating frequency f_c is less than or equal to the first reference frequency f1 in operation S3304, S3404 is being operated, Operating frequency f_c is set as the first reference frequency f1 by controller 200,201,202,203,204,205,206,207 or 208, And operation duty cycle d_c is calculated based on control information.

Then, in operation S3424, whether the operation duty cycle d_c for determining to calculate is more than second with reference to duty cycle d2.

If being less than or equal to second in the operation duty cycle d_c that S3424 determines to calculate refers to duty cycle d2, operating S3704, controller 200,201,202,203,204,205,206,207 or 208 are accounted for using the operating frequency f_c of calculating and operation It is empty to produce control signal than d_c, and export the control signal of generation.

Alternatively, if being more than second in the S3424 operation duty cycle d_c for determining to calculate refers to duty cycle d2, grasping Make S3444, controller 200,201,202,203,204,205,206,207 or 208 is fixed as the second ginseng by duty cycle d_c is operated Duty cycle d2 is examined, and operating frequency f_c is calculated based on control information again.

After operation S3444 is performed, in operation S3704, 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 that calculate, and export the control signal of generation.

If determining that the operating frequency f_c calculated is more than the first reference frequency f1 in operation S3304, in operation S3504 Determine whether the operating frequency f_c calculated is less than the second reference frequency f2.

If determine that the operating frequency f_c calculated is less than the second reference frequency f2 in operation S3504, that is to say, that grasping Make values of the operating frequency f_c of S3204 calculating between the first reference frequency f1 and the second reference frequency f2, then operating S3704, controller 200,201,202,203,204,205,206,207 or 208 are accounted for using the operating frequency f_c of calculating and operation It is empty to produce control signal than d_c, and export the control signal of generation.

If determining that operating frequency f_c is greater than or equal to the second reference frequency f2 in operation S3504, S3604 is being operated, Operating frequency f_c is set as the second reference frequency f2 by controller 200,201,202,203,204,205,206,207 or 208, And operation duty cycle d_c is calculated based on control information.

After operation S3604 is performed, in operation S3704, 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 that calculate, and export the control signal of generation.

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 and operation duty cycle of the wireless power sending method under electric power sending mode.

First, in normal mode n, controller 200,201,202,203,204,205,206,207 or 208 is in response to from nothing The control information that line power receiver 2 receives, is received by varying operating frequency f_c to adjust by wireless power receiver 2 Electricity.In this case, operation duty cycle d_c is fixed as ping duty cycles d_p.In normal mode n, operating frequency f_c Change in the range of the first reference frequency f1 to the second reference frequency f2.

Connect in the case of the first reference frequency f1 is reduced to even in operating frequency f_c by wireless power receiver 2 When the electricity of receipts is still less than electricity needed for wireless power receiver 2, controller 200,201,202,203,204,205,206, 207 or 208 operator scheme is changed into the first boost mode h1, controller 200,201,202,203,204,205,206,207 or 208 adjust operation duty cycle d_c after operating frequency f_c to be fixed as to the first reference frequency f1.In the first boost mode h1, Operation duty cycle d_c can change in the range of ping duty cycles d_p to second is with reference to duty cycle d2.

Lead in the case of increasing to second with reference to duty cycle d2 in the first boost mode h1 even in operation duty cycle d_c When crossing the electricity of the reception of wireless power receiver 2 still less than electricity needed for wireless power receiver 2, controller 200,201, 202nd, 203,204,205,206,207 or 208 operator scheme is changed into the second boost mode h2, and controller 200,201, 202nd, 203,204,205,206,207 or 208 pass through what wireless power receiver 2 received by varying operating frequency f_c adjustment Electricity.Second is fixed to reference to duty cycle d2 in the second boost mode h2, operation duty cycle d_c.In the second boost mode h2, Operating frequency f_c can change in the range of the first reference frequency f1 to minimum frequency f_min.

In the normal mode, wireless power is passed through in the case of the second reference frequency f2 is increased to even in operating frequency When the electricity that receiver 2 receives is still greater than electricity needed for wireless power receiver, controller 200,201,202,203,204, 205th, 206,207 or 208 operator scheme is changed into the first decompression mode l1, and controller 200,201,202,203,204, 205th, 206,207 or 208 by operating frequency f_c after the second reference frequency f2 is fixed as, adjustment operation duty cycle d_c. First decompression mode l1, operation duty cycle d_c change in the range of the first reference duty cycle d1 to ping duty cycles d_p.

Below with reference to the operation of electricity (that is, load capacity) description Figure 34 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 in normal mode n.If load capacity is more than first with reference to negative Carrying capacity R14 is simultaneously less than the 3rd reference load amount R34, then controller 200,201,202,203,204,205,206,207 or 208 exists First boost mode h1 is operated.If load capacity is less than the second reference load amount R24, controller 200,201,202, 203rd, 204,205,206,207 or 208 operated in the first decompression mode l1.In the first decompression mode l1, normal mode n and The operation of first boost mode h1 is identical with the above-mentioned operation on Figure 32 descriptions.

If load capacity is more than the 3rd reference load amount R34, controller 200,201,202,203,204,205,206, 207 or 208 are operated in the second boost mode h2.In 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. Two boost mode h2, operating frequency f_c change in the range of the first reference frequency f1 to minimum frequency f_min.

Figure 35 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 the operation of electric power sending mode operational flowchart.

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 operation S3465, 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 determine to be greater than or equal to minimum frequency f_ in the operating frequency f_c that operation S3445 is calculated in operation S3465 Min, then use the operation frequency calculated in operation S3705, controller 200,201,202,203,204,205,206,207 or 208 Rate f_c and operation duty cycle d_c produce control signal, and export the control signal of generation.

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

After operation S3485 is performed, in operation S3705, 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 that calculate, and export the control signal of generation.

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 and operation duty cycle of the wireless power sending method under electric power sending mode.

In Figure 36, in the first decompression mode l1, normal mode n, the first boost mode h1 and the second boost mode h2 Operation is identical with the operation described in Figure 34.

With reference to Figure 36, in the second boost mode h2, in the case of minimum frequency f_min is reduced to even in operating frequency During by the electricity that wireless power receiver 2 receives still less than electricity needed for wireless power receiver 2, controller 200,201, 202nd, 203,204,205,206,207 or 208 operator scheme is changed into the 3rd boost mode h3.In the 3rd boost mode h3, control Operating frequency f_c is fixed as minimum frequency f_min by device 200,201,202,203,204,205,206,207 or 208 processed, and is increased Big operation duty cycle d_c.In the 3rd boost mode h3, operation duty cycle d_c is with the second value for referring to duty cycle d2 or more Big value.For example, in the 3rd boost mode h3, duty cycle d2 is being referred to more than or equal to second and is being less than or equal to maximum duty cycle d_ Adjustment operation duty cycle d_c in the range of max.Consider to be based on using wireless power transmitter 1,1-1,1-2,1-3,1- by user 4th, the limitation of the environment of 1-5,1-6,1-7 or 1-8 or standard and other agreements carries out setting second with reference to duty cycle d2 and most Big space rate d_max.

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 with 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 with And wireless power sending method is in the operational flowchart of the operation of 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.

When operate S3606 calculate operation duty cycle d_c after, controller 200,201,202,203,204,205,206, Whether 207 or 208 be less than first with reference to duty cycle d1 in the operation S3626 operation duty cycle d_c for determining to calculate.

If determining that operation duty cycle d_c is greater than or equal to first and refers to duty cycle d1 in operation S3626, operating S3706, controller 200,201,202,203,204,205,206,207 or 208 use the operation duty calculated in operation S3606 Control signal is produced than d_c and operating frequency f_c, and exports the control signal of generation.

Alternatively, if determining that operation duty cycle d_c is less than first and refers to duty cycle d1 in S3626, operating S3646, controller 200,201,202,203,204,205,206,207 or 208 are fixed as the first reference by duty cycle d_c is operated Duty cycle d1, and operating frequency f_c is calculated based on control information.

After operation S3646 is performed, in operation S3706, 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 that calculate, and export the control signal of generation.

Figure 38 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 operating frequency of the wireless power sending method under electric power sending mode and operate duty cycle change diagram.

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.

In the first decompression mode I1, in the case of being reduced to first with reference to duty cycle d1 even in operation duty cycle d_c During by the electricity that wireless power receiver 2 receives still greater than electricity needed for wireless power receiver 2, controller 200,201, 202nd, 203,204,205,206,207 or 208 operator scheme is changed into the second decompression mode I2.In the second decompression mode I2, control Operation duty cycle d_c is fixed as first and refers to duty cycle by device 200,201,202,203,204,205,206,207 or 208 processed D1, and change operating frequency f_c.In the second decompression mode I2, operating frequency f_c is in the second reference frequency f2 to peak frequency f_ Change in the range of max.

That is, if load capacity is less than the 4th reference load amount R46, controller 200,201,202,203,204, 205th, 206,207 or 208 operated with 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 with And the operational flowchart 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 S3407 calculates operation duty cycle d_c, controller 200,201,202,203,204, 205th, whether 206,207 or 208 be more than second with reference to duty cycle d2 in the operation S3427 operation duty cycle d_c for determining to calculate.

If being less than or equal to second in the operation duty cycle d_c that operation S3427 determines to calculate refers to duty cycle d2, S3707 is operated, controller 200,201,202,203,204,205,206,207 or 208 uses the operation calculated in operation S3407 Duty cycle d_c and operating frequency f_c produces control signal, and exports the control signal of generation.

Alternatively, if being more than second in the S3427 operation duty cycle d_c for determining to calculate refers to duty cycle d2, grasping Make S3447, controller 200,201,202,203,204,205,206,207 or 208 is fixed as the second ginseng by duty cycle d_c is operated Duty cycle d2 is examined, and operating frequency f_c is calculated based on control information again.

After operation S3447 is performed, in operation S3707, 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 that calculate, and export the control signal of generation.

After operation S3607 calculates operation duty cycle d_c, controller 200,201,202,203,204,205,206, Whether 207 or 208 be less than first with reference to duty cycle d1 in the operation S3627 operation duty cycle d_c for determining to calculate.

If determining that operation duty cycle d_c is greater than or equal to first and refers to duty cycle d1 in operation S3627, operating S3707, controller 200,201,202,203,204,205,206,207 or 208 use the operation duty calculated in operation S3607 Control signal is produced than d_c and operating frequency f_c, and exports the control signal of generation.

Alternatively, if being less than first in the S3627 operation duty cycle d_c for determining to calculate refers to duty cycle d1, grasping Make S3647, controller 200,201,202,203,204,205,206,207 or 208 is fixed as the first ginseng by duty cycle d_c is operated Duty cycle d1 is examined, and operating frequency f_c is calculated based on control information.

After operation S3647 is performed, in operation S3707, controller 200,201,202,203,204,205,206,207 Or 208 produce control signal using the operating frequency f_c and duty cycle d_c that calculate, and the control signal of generation is exported.

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 and operation duty cycle of the wireless power sending method under electric power sending mode.

In Figure 40, described in the operation of the first decompression mode I1, normal mode n and the first boost mode h1 and Figure 32 First decompression mode I1, normal mode n and the first boost mode h1 operations are identical.

With reference to Figure 40, in the first decompression mode I1, duty cycle d1 is referred to when being reduced to first even in operation duty cycle d_c In the case of by the electricity that wireless power receiver 2 receives still greater than electricity needed for wireless power receiver 2 when, controller 200th, 201,202,203,204,205,206,207 or 208 operator scheme is changed into the second decompression mode I2.Mould is depressured second Formulas I 2, controller 200,201,202,203,204,205,206,207 or 208 are fixed as the first reference by duty cycle d_c is operated Duty cycle d1, and change operating frequency f_c.In the second decompression mode I2, operating frequency f_c is in the second reference frequency f2 to maximum Change in the range of 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 with the second decompression mode l2.

Lead in the case of increasing to second with reference to duty cycle d2 in the first boost mode h1 even in operation duty cycle d_c When crossing the electricity of the reception of wireless power receiver 2 still less than electricity needed for wireless power receiver 2, controller 200,201, 202nd, 203,204,205,206,207 or 208 operator scheme is changed into the second boost mode h2.In the second boost mode h2, control Device 200,201,202,203,204,205,206,207 or 208 processed is connect by varying operating frequency f_c adjustment by wireless power Receive the electricity that device 2 receives.Second is fixed to reference to duty cycle d2 in the second boost mode h2, operation duty cycle d_c.Second Boost mode h2, operating frequency f_c change in the range of the first reference frequency f1 to minimum frequency f_min.

That is, if load capacity is more than the 3rd reference load amount R37, controller 200,201,202,203,204, 205th, 206,207 or 208 operated with 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 with And the operational flowchart 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.

If determine to be greater than or equal to the second reference frequency in the operating frequency f_c that operation S3208 is calculated in operation S3508 F2, then in operation 3608, operating frequency f_c is set as by controller 200,201,202,203,204,205,206,207 or 208 Second reference frequency f2, by the operation duty cycle d_c1 of the first branch (leg) (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 cycle of the second branch 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 operation S3708, 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_c1 and d_c2 that calculate, and export the control of generation 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 and operation duty cycle of the wireless power sending method under electric power sending mode.

In Figure 42, described in normal mode n, the first boost mode h1 and operation in the second boost mode h2 and Figure 34 Normal mode n, the first boost mode h1 and the second boost mode h2 operation it is identical.

With reference to Figure 42, in normal mode n, in the case of the second reference frequency f2 is increased to even in operating frequency f_c During by the electricity that wireless power receiver 2 receives still greater than electricity needed for wireless power receiver 2, controller 200,201, 202nd, 203,204,205,206,207 or 208 operator scheme is changed into the 3rd decompression mode l3.In the 3rd decompression mode l3, 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)).In the 3rd decompression mode l3, the operation of the second branch Duty cycle d_c2 changes in the range of ping duty cycles d_p to (100%-ping duty cycle d_p).

That is, if load capacity is less than the second reference load amount R28, controller 200,201,202,203,204, 205th, 206,207 or 208 operated with the 3rd decompression mode l3.

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 with And the operational flowchart 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, if determining to be greater than or equal to the in the operating frequency f_c that operation S3209 is calculated in operation S3509 Two reference frequency f2, then account for operation in operation S3609, controller 200,201,202,203,204,205,206,207 or 208 It is empty to be set as operation duty cycle of the operation of converter 111,112,113,114,115,116 or 117 for half-bridge than d_c, and be based on Control information calculates operating frequency f_c.

After operation S3609 is performed, in operation S3709, 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 that calculate, and export the control signal of generation.

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 and operation duty cycle of the wireless power sending method under electric power sending mode.

In Figure 44, described in normal mode n, the operation of the first boost mode h1 and the second boost mode h2 and Figure 34 The operation of normal mode n, the first boost mode h1 and the second boost mode h2 are identical.

In normal mode n, pass through radio in the case of the second reference frequency f2 is increased to even in operating frequency f_c When the electricity that power receiver 2 receives is still greater than electricity needed for wireless power receiver 2, controller 200,201,202,203, 204th, 205,206,207 or 208 operator scheme is changed into the 4th decompression mode I4.In the 4th decompression mode I4, controller 200, 201st, 202,203,204,205,206,207 or 208 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, by 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)) is fixed as 100%, and adjust operating frequency f_c.In the 4th decompression mode l4, operating frequency f_c is in the second reference frequency f2 to maximum frequency Change in the range of rate f_max.

That is, if load capacity is less than the second reference load amount R29, controller 200,201,202,203,204, 205th, 206,207 or 208 operated with the 4th decompression mode l4.

Figure 45 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 operational flowchart 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, if determining to be greater than or equal to the in the operating frequency f_c that operation S3210 is calculated in operation S3510 Two reference frequency f2, then will operate frequency in operation S3610, controller 200,201,202,203,204,205,206,207 or 208 Rate f_c is set as the second reference frequency f2, by the operation duty cycle d_c1 of the first branch (that is, second control signal con24, The duty cycle of con25 and con28 (Figure 11,12 and 15)) ping duty cycle d_p are fixed as, and calculate the behaviour of the second branch Make 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 operation S3630, controller 200,201,202,203,204,205,206,207 Or 208 determine whether the operation duty cycle d_c2 of the second branch calculated is less than ping duty cycles d_p.

If determine to be greater than or equal in the operation duty cycle d_c2 of the S3610 the second branches calculated in operation S3630 Ping duty cycle d_p, then in operation S3710, controller 200,201,202,203,204,205,206,207 or 208 uses exist Operation duty cycle d_c and the operating frequency f_c generation control signals that S3610 is calculated are operated, and exports the control signal of generation.

Alternatively, if determining that the operation duty cycle d_c2 of the second branch in operation S3610 calculating is small in operation S3630 In ping duty cycle d_p, then will be grasped in operation S3650, controller 200,201,202,203,204,205,206,207 or 208 Make duty cycle d_c and be set as operation duty cycle of the operation of converter 111,112,113,114,115,116 or 117 for half-bridge, and Operating frequency f_c is calculated based on control information.In operation S3650, the operation duty cycle d_c1 of the first branch is fixed as ping Duty cycle d_p, and the operation duty cycle d_c2 of the second branch is fixed as 100%.

After operation S3650 is performed, in operation S3710, 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 that calculate, and export the control signal of generation.

Figure 46 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 operating frequency of the wireless power sending method under electric power sending mode and operate duty cycle change curve map.

In figures 4-6 can, described in normal mode n, the first boost mode h1 and operation in the second boost mode h2 and Figure 34 Normal mode n, the first boost mode h1 and the second boost mode h2 in operation it is identical.

In normal mode n, pass through radio in the case of the second reference frequency f2 is increased to even in operating frequency f_c When the electricity that power receiver 2 receives is still greater than electricity needed for wireless power receiver 2, controller 200,201,202,203, 204th, 205,206,207 or 208 operator scheme is changed into the 3rd decompression mode l3.In the 3rd decompression mode l3, controller 200, 201st, 202,203,204,205,206,207 or 208 operating frequency f_c is fixed as the second reference frequency f2, by the first branch Operation duty cycle 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 are fixed as, and adjust operation duty cycle d_c2 (that is, the 4th control signals con44, con45 of the second branch With the duty cycle of con48 (Figure 11,12 and 15)).In the 3rd decompression mode l3, the operation duty cycle d_c2 of the second branch is in ping Duty cycle d_p is to changing in the range of (100%-ping duty cycle d_p).

In the 3rd decompression mode I3, when the operation duty cycle d_c2 even in the second branch is reduced to ping duty cycles d_p In the case of by the electricity that wireless power receiver 2 receives still greater than electricity needed for wireless power receiver 2 when, controller 200th, 201,202,203,204,205,206,207 or 208 operator scheme is changed into the 4th decompression mode l4.Mould is depressured the 4th Formula l4, controller 200,201,202,203,204,205,206,207 or 208 by the operation duty cycle d_c of the first branch (i.e., The duty cycle of second control signal con24, con25 and con28 (Figure 11,12 and 15)) ping duty cycle d_p are fixed as, By the operation duty cycle d_c2 of the second branch, (that is, the 4th control signal con44, con45 and con48 (Figure 11,12 and 15) account for Empty ratio) 100% is fixed as, and adjust operating frequency f_c.In the 4th decompression mode l4, operating frequency f_c is in the second reference frequency Change in the range of f2 to peak frequency f_max.

That is, if load capacity is less than the second reference load amount R210 and is more than the 4th reference load amount R410, Controller 200,201,202,203,204,205,206,207 or 208 is operated with the 3rd decompression mode l3.If load capacity Less than the 4th reference load amount R410, then controller 201,202,203,204,205,206,207 or 208 is with the 4th decompression mode L4 is operated.

The control method in each figure in Figure 27 to Figure 46 can reconfigure in a variety of manners.For example, it will can also scheme The operation of the 3rd boost mode h3 of 35 operation S3465 and S3485 or Figure 36 is added to each figure in Figure 27 to Figure 46 In control method.Alternatively, also perform and shown in the 3rd decompression mode and/or Figure 44 and Figure 46 shown in Figure 42 and Figure 46 The 4th decompression mode, to replace the first decompression mode and/or the second decompression mode according to another embodiment.Alternatively, exist In each figure in Figure 27 to Figure 46, operation and operator scheme are performed while certain operations and operator scheme is omitted.

The control method that Figure 27 is shown into Figure 46 is based on the request signal inputted from wireless power receiver 2 and with various Mode performs.

For example, make the ping frequency f_p selected as frequency identical with the first reference frequency f1.Thereafter, if based on from nothing The electricity that 2 received signal of line power receiver determines to receive by wireless power receiver 2 is less than the institute of wireless power receiver 2 The electricity needed, then also perform the operation in the first boost mode h1 according to above-described embodiment.Alternatively, if based on from wireless The electricity that 2 received signal of power receiver determines to receive by wireless power receiver 2 is more than needed for wireless power receiver 2 Electricity, then also perform the operation in the normal mode n according to above-described embodiment.

Thereafter, based on from 2 received signal of wireless power receiver, also it is sequentially performed first according to above-described embodiment Boost mode h1, the second boost mode h2, the 3rd boost mode h3, normal mode n, the first decompression mode I1, the second decompression mould It is at least one in the operation of Formulas I 2, the 3rd decompression mode I3 and the 4th decompression mode I4.

For example, wireless power receiver 2 battery be in close to discharge condition state in the case of, wireless power connects Receiving device 2 first needs a large amount of electric power, then as gradually charging to battery, gradually needs small amount electric power.In such case Under, after the operation in performing the first boost mode h1, the second boost mode h2 or the 3rd boost mode h3, it is sequentially performed In normal mode n and the first decompression mode I1, the second decompression mode I2, the 3rd decompression mode I3 or the 4th decompression mode I4 Operation.

Alternatively, in the case where the battery for making wireless power receiver 2 is charged to a certain degree, wireless power receiver 2 start to need a small amount of electric power.Therefore, in this case, the first decompression mode I1, the second decompression mode I2, is first carried out Operation in three decompression mode I3 or the 4th decompression mode I4.

Alternatively, when wireless power receiver 2 and wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5,1-6,1-7 Or between 1-8 alignment (alignment state) dislocation (distorted) when, the control is changed into Figure 27 to Figure 46 The direction of middle load capacity increase.For example, when the operation in normal mode n is performed or the first decompression mode l1, the second decompression Wireless power receiver 2 is sent with wireless power during operation in pattern l2, the 3rd decompression mode l3 or the 4th decompression mode l4 When device 1, the alignment between 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 misplace, the behaviour in normal mode n can also carry out Make or the first boost mode h1, the second boost mode h2 or the 3rd boost mode h3 in operation.Alternatively, when performing the Wireless power receiver 2 and wireless power transmitter 1,1-1,1-2,1-3,1-4,1-5,1- during operation in one boost mode h1 6th, when the alignment between 1-7 or 1-8 misplaces, it can also carry out the operation in the second boost mode h2.

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- During 8 abundant alignment, the control is changed into Figure 27 directions that load capacity reduces into Figure 46.For example, executable first decompression mode Operation in I1, the second decompression mode I2, the 3rd decompression mode I3 or the 4th decompression mode I4, while perform in normal mode n Operation.

Also perform the control method that Figure 27 is shown into Figure 46 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 adjusts the duty cycle and frequency of control signal, at the same time Preferentially meet following conditions：The frequency that the frequency wirelessly sent is reference value or smaller, is wirelessly sent be reference value or Bigger and belong to preset range.

Figure 47 A and 47B be 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 curve map of output voltage.

The thick dashed line of Figure 47 A show the embodiment shown in each figure according to Fig. 7 to Figure 15 resonator 120, 121st, 122,123,124,125,126,127 or 128 coil current, while the fine line of Figure 47 A shows and is shown according to contrast The coil current of example.

Thick dashed line in the curve described in Figure 47 B is shown as the reality shown in each figure according to Fig. 7 to Figure 15 The output voltage of the resonator 120,121,122,123,124,125,126,127 of example or the voltage at 128 both ends is applied, in Figure 47 B Fine line in the curve of description shows the output voltage according to comparative examples.

Comparative examples are the wireless power transmitter including full-bridge inverter operated by receiving input electric power. In the case of comparative examples, input electric power is the electric power provided by the boost converter being implemented separately with inverter.

As shown in the figure, can confirm wireless power transmitter 1 according to the embodiment, 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 is provided and the corresponding coil current of full-bridge inverter according to comparative examples and output electricity when using half-bridge inverter Pressure.

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

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 based on 50% duty cycle, and filament is shown to be accounted for according to 70% The boost voltage of empty ratio.

As shown in the figure, being to be appreciated that, the boost voltage based on 50% duty cycle is about 10V, and based on 70% The output voltage of the boosting unit of duty cycle is slightly above 16V, so provides the boosting efficiency of higher.

In addition, accordingly, as shown in Figure 48 B, it will appreciate that, the wireless power transmitter based on 50% duty cycle 1st, the output voltage of 1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 are about 5V, and based on the boosting unit of 70% duty cycle Output voltage close to 7V, the output of higher is so provided.

As explained above, according to the embodiment of the disclosure herein, wireless power transmitter 1,1-2,1-3,1- 4th, 1-5,1-6,1-7 or 1-8 and wireless power sending method, which reduce, is used to manufacture the required component of wireless power transmitter Quantity, so that the wireless power transmitter of small size can be realized, and its material cost can be saved.In addition, according to reality here The wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power sending method of example are applied to user Provide more convenience, such as, increase meets that wirelessly sending electric power needs meets while wirelessly sending the scope of electric power Various limitations, and also improve wireless power transmitting efficiency.In addition, according to the wireless power transmitter 1 of embodiment here, 1-1,1-2,1-3,1-4,1-5,1-6,1-7 or 1-8 and wireless power sending method more precisely control electric power transmission, from And prevent unnecessary power consumption, and prevent the overheat of wireless power receiver 2 or for wireless power receiver 2 The damage of element.In addition, wireless power transmitter 1,1-2,1-3,1-4,1-5,1-6,1-7 according to the embodiment disclosed herein Or 1-8 and the reduction of wireless power sending method occur when producing and being used to determine whether the signal there are wireless power receiver Surge current and peak point current, be used to determine whether behaviour under the detection pattern there are wireless power receiver so as to stablize Make.

By nextport hardware component NextPort come realize the controller 200 in the Fig. 7 to Figure 15 for performing operation described in this application, 201, 202nd, 203,204,205,206,207 or 208, the nextport hardware component NextPort is configured as performing described in this application by hardware group The operation that part performs.Example available for the nextport hardware component NextPort for performing operation described in this application includes control in appropriate circumstances Device processed, sensor, maker, driver, memory, comparator, arithmetic logic unit, adder, subtracter, multiplier, remove Musical instruments used in a Buddhist or Taoist mass, integrator and other any electronic building bricks for being configured as performing operation described in this application.In other examples, Behaviour described in this application is performed to realize by computer hardware (for example, passing through one or more processors or computer) One or more nextport hardware component NextPorts made.Processor or computer can be realized by one or more treatment elements, for example, patrolling Collect gate array, controller and arithmetic logic unit, digital signal processor, microcomputer, programmable logic controller (PLC), scene Programmable gate array, programmable logic array, microprocessor are configured as responding and performing in a defined manner referring to Order with obtain desired result any other devices or device combination.In one example, processor or computer include The instruction or one or more memories of software that (or being connected to) storage is performed by processor or computer.Pass through processing Device or computer implemented nextport hardware component NextPort can perform such as operating system (OS) and run on the OS one or more The instruction of software application or software, to perform operation described in this application.Nextport hardware component NextPort may also be responsive in instruction or software Perform to access, operate, handle, create and store data.For the sake of simplicity, the term " processor " of odd number or " computer " can For describing described example, but in other examples in this application, multiple processors or computer, or place can be used Reason device or computer may include multiple treatment elements or polytype treatment element, or including both.For example, it can pass through Either two or more processors or processor and controller realize single nextport hardware component NextPort or two to single processor Or more nextport hardware component NextPort.It can be realized by one or more processors or processor and controller one or more Nextport hardware component NextPort, can realize one or more by other one or more processors or another processor and another controller Other multiple nextport hardware component NextPorts.Either processor and controller can realize single nextport hardware component NextPort or two to one or more processors A or more nextport hardware component NextPort.Nextport hardware component NextPort can have the different processing configuration of any one or more, its example includes single Processor, independent processor, parallel processor, SISD single instruction single data (SISD) multiple treatment device, single-instruction multiple-data (SIMD) multiple treatment device, multiple instruction single data (MISD) multiple treatment device and multiple-instruction multiple-data (MIMD) multi task process 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

1. a kind of wireless power transmitter, including：

Converter, including at least one switch element, and be configured as producing boosting input electric power；

Resonator, the boosting input electric power for being configured as receiving are sent in a detection mode as alternating electromotive force Any of ping signals, the type for determining the whether close and described exterior object of exterior object or the two； And

Controller, is configured as controlling the switch element, and makes under the detection pattern to be provided to the switch member The duty cycle of the signal of part gradually increases.

2. wireless power transmitter as claimed in claim 1, wherein, the controller makes the duty of the signal The amount equal with reference duty cycle than gradually increase.

3. wireless power transmitter as claimed in claim 2, wherein, under the initial mode of operation of the detection pattern, institute Stating controller makes the duty cycle of the signal increase from 0% the first duty cycle.

4. wireless power transmitter as claimed in claim 3, wherein, the initial mode of operation in abort state with persistently joining Examine send after time or the time longer than the reference time ping signals pattern it is corresponding.

5. wireless power transmitter as claimed in claim 4, wherein, the controller makes the duty of the signal Than increasing to ping duty cycles, and the boosting input electric power is set to increase to the institute reached for producing the ping duty cycles State the target boosting input electric power of ping signals.

6. wireless power transmitter as claimed in claim 5, wherein, the controller is additionally configured to calculate and gradually increase To the relevant data of voltage level of the boosting input electric power of target boosting input electric power, with the boosting input electricity The corresponding duty cycle of the voltage level of power gradually increases.

7. wireless power transmitter as claimed in claim 6, wherein, the controller is additionally configured in the detection pattern Standby operating mode under the duty cycle of the signal is increased from the second duty cycle, and second duty cycle Based on it is described boosting input electric power the voltage level and determine.

8. wireless power transmitter as claimed in claim 7, wherein, the standby operating mode in abort state with sending Ping signals are corresponding continuously less than the pattern of the reference time.

9. wireless power transmitter as claimed in claim 7, wherein, boosting described in the phase estimate based on the ping signals The voltage level of input electric power.

10. wireless power transmitter as claimed in claim 7, wherein, the voltage water based on the boosting input electric power The gentle data and calculate second duty cycle.

11. wireless power transmitter as claimed in claim 10, wherein, second duty cycle is by by Weighted Index application Determined in the ping duty cycles, the Weighted Index by by the target boost input electric power voltage level with it is described The voltage level of boosting input electric power compares and is calculated.

12. wireless power transmitter as claimed in claim 10, wherein, the data provide in the form of a lookup table, and Second duty cycle passes through look-up table retrieval and the corresponding duty of the voltage level of the boosting input electric power Than and determine.

13. a kind of wireless power transmitter, the wireless power transmitter is including the detection mould of first mode and second mode Operated under formula, and ping signals are sent under the detection pattern, the wireless power transmitter includes：

Converter, including at least one switch element, and the switching manipulation based on the switch element is configured as by input Electrical power conversion is boosting input electric power, and exports the boosting input electric power as alternating electromotive force；

Resonator, is configured as producing the ping signals from the alternating electromotive force；And

Controller, is configured as controlling the switch element, is provided to the grid of the switch element in the first mode The duty cycle of pole signal increases from the first duty cycle, and make in the second mode the duty cycle of the signal from than High the second duty cycle increase of first duty cycle.

14. wireless power transmitter as claimed in claim 13, wherein, the controller is additionally configured in first mould The duty cycle of the signal is increased to ping duty cycles under formula, and reach the boosting input electric power and be used for Produce the target boosting input electric power of the ping signals of the ping duty cycles.

15. wireless power transmitter as claimed in claim 14, wherein, second duty cycle is based on Weighted Index application Determined in the ping duty cycles, the Weighted Index by by the target boost input electric power voltage level with it is described The voltage level of boosting input electric power compares and is calculated.

16. wireless power transmitter as claimed in claim 13, wherein, the switch element is configured as performing from described defeated Enter output of the electric power to the conversion operation of the boosting input electric power and by the boosting input electric power output for alternating electromotive force Operation.

17. a kind of wireless power transmitter, including：

Converter, is configured as producing alternating voltage；

Whether resonator, is configured as receiving the alternating voltage, and sends ping signals, for determining exterior object attached Closely；And

Controller, is configured as controlling switch element in a detection mode, and is provided to the grid letter of the switch element Number duty cycle increase to target duty ratio from the first duty cycle according to step size.

18. wireless power transmitter as claimed in claim 17, wherein, the step size is integer.

19. wireless power transmitter as claimed in claim 18, wherein, first duty cycle is 0%.

20. wireless power transmitter as claimed in claim 18, wherein, the detection pattern includes initial mode of operation, institute Described in stating initial mode of operation and being sent after abort state continues reference time or the time longer than the reference time The pattern of ping signals is corresponding.