CN105049008A

CN105049008A - Signal modulation method and signal rectification and modulation device

Info

Publication number: CN105049008A
Application number: CN201510357539.7A
Authority: CN
Inventors: 蔡明球; 詹其哲
Original assignee: Fu Da Tong Technology Co Ltd
Current assignee: Fu Da Tong Technology Co Ltd
Priority date: 2015-06-02
Filing date: 2015-06-25
Publication date: 2015-11-11
Anticipated expiration: 2035-06-25
Also published as: TW201535914A; TWI540813B; CN107887986A; CN107887986B; CN105049008B

Abstract

The invention discloses a signal modulation method and a signal rectification and modulation device, which are used for a power receiving module of an induction type power supply, wherein the signal modulation method comprises the steps of setting a plurality of modulation intervals corresponding to a modulation signal; modulating a first end of an induction coil of the power receiving module in an ith modulation interval of the plurality of modulation intervals, wherein i is an odd number; modulating a second end of the induction coil of the power receiving module in a jth modulation interval of the plurality of modulation intervals, wherein j is an even number; wherein the second terminal is not modulated when the first terminal is modulated and the first terminal is not modulated when the second terminal is modulated.

Description

Signal modulating method and signal rectification and modulating device

Technical field

The present invention relates to a kind of signal modulating method and signal rectification and modulating device, particularly relate to a kind of dislocation type signal modulating method and signal rectification thereof and modulating device.

Background technology

In inductive power-supply supply device, in order to safe operation, need to confirm that on its power supply coil, induction region is correct current-collecting device at feed end, and just electric power transmission is carried out under the situation that can receive electric power, in order to enable feeder ear identification receiving end whether be correct current-collecting device, need to identify by transmitting numeric data code.The transmission of numeric data code drives power supply coil to produce resonance by feeder ear, send electromagnetic energy and be sent to receiving end, to carry out electric power transmission, and when receiving end receives electric power, the impedance state on receiving coil is changed by signal modulation technique, the resonance carrier signal change of being powered on coil by feedback influence again, to transmit numeric data code.

Above-mentioned numeric data code is made up of multiple modulation signal.In the prior art, receiving end carries out signal madulation at induction coil two ends simultaneously.Such as, in the powered module 20 of U.S. Patent Publication case US2013/0342027A1, switch module A6 and B6 corresponding to induction coil two ends opened by powered microprocessor 21 simultaneously, to modulate induction coil two ends simultaneously.Specifically, between modulation period, switch module A6 and B6 meeting conducting simultaneously, makes signal madulation resistance A3 and B3 modulate simultaneously, and now, owing to controlling the running of diode A4 and B4, bridge switch assembly A2 and B2 can stop carrying out rectification simultaneously.In the case, the signal amplitude reflexing to power supply coil if make strengthens, and needs to increase modulating time, but the lengthening of modulating time represents the out-of-work time lengthening of rectifier, makes it reduce rear end power supply capacity.On the other hand, when signal madulation resistance A3 and B3 resistance more hour, the signal reflexing to feeder ear is larger, and what bring is that the power of loss between modulation period is larger simultaneously.That is, strengthen another implementation of reflected signal for reducing signal madulation resistance, but the amplitude reduced still is limited to the bottleneck of power loss.

In addition; bridge switch assembly A2 and B2 being used for carrying out rectification is connected to induction coil respectively by protective resistance B1 and A1; and the grid voltage of bridge switch assembly A2 and B2 is controlled by coil voltage, be turned on or off carry out rectification running to control bridge switch assembly A2 and B2.But, if the running speed for improving bridge switch assembly A2 and B2, the size of protective resistance A1 and B1 need be reduced to improve the grid charge/discharge rates of bridge switch assembly A2 and B2.In this case, the protective resistance A1 that resistance is lower and B1 easily burns making Zener diode A5 and B5 bear larger power, and the switch speed of rectifier switch is therefore limited.

On the other hand, in the powered module 20 of U.S. Patent Publication case US2013/0342027A1, voltage stabilizing circuit 25 needs electric capacity of voltage regulation 251 to maintain the stable of output voltage, because electric capacity of voltage regulation 251 often has larger capacitance, breaking protection circuit 24 is provided with at electric capacity of voltage regulation 251 and between rectification and signal feedback circuit 23, with when feeder ear and receiving end respond to initial stage rectification and signal feedback circuit 23 starts output power, first electric power can be supplied to powered microprocessor 21 to use, avoid electric capacity of voltage regulation 251 hyperabsorption electric charge and powered microprocessor 21 cannot be started smoothly.In addition, when electricity reception coil 271 has just left feeder ear, still there is a large amount of electric charge in electric capacity of voltage regulation 251, and this electric charge meeting adverse current, to powered microprocessor 21, makes powered microprocessor 21 cannot differentiate whether be in the inductive power supply stage at present.Moreover; another problem may be there is in foregoing circuit structure; when namely just having started to sense electric power; breaking protection circuit 24 is closed; that is; rectification and signal feedback circuit 23 end be not when having bulky capacitor assist absorption electric charge, and the high voltage of moment may cause circuit unit to damage.In addition, in the moment that breaking protection circuit 24 is opened, electric capacity of voltage regulation 251 starts to absorb electric charge in a large number, and the operating voltage of powered microprocessor 21 is reduced instantaneously, and powered microprocessor 21 may be caused to decommission or produce other harmful effect.

Please refer to Fig. 1, Fig. 1 is the waveform schematic diagram of signal madulation.As shown in Figure 1, waveform W1_1 is the signal of switch module A6 and B6 in the powered module 20 of U.S. Patent Publication case US2013/0342027A1, and actuating switch assembly A6 and B6 while that it being when high potential, to produce modulation signal.Waveform W1_2 then represents that above-mentioned modulation signal reflexes to the signal obtained after feeder ear is processed by signal resolution circuit 13 again.From waveform W1_2, the change amount signal that each modulation signal feeds back to feeder ear is not of uniform size, this is because in the prior art, modulator control signal (i.e. the signal of switch module A6 and B6) and coil cycle of oscillation are without any corresponding relation.In other words, modulation signal be randomness appear at power supply coil cycle of oscillation on, the starting point of power supply coil cycle of oscillation that each modulating range is reflected is not fixed with vibration quantity, and then makes to be subject to modulating the variable quantity changing power supply coil amplitude and also do not fix.According to the content of U.S. Patent Publication case US2013/0342027A1, because feeder ear can carry out the level of dynamic conditioning signal differentiation according to the variable quantity of coil signal, coil amplitude variations amount not of uniform size easily causes the erroneous judgement of signal.

Further, please refer to Fig. 2, Fig. 2 is the signal waveform schematic diagram of a modulating range of signal madulation.As shown in Figure 2, waveform W2_1 is the signal of switch module A6 and B6 in the powered module 20 of U.S. Patent Publication case US2013/0342027A1, and actuating switch assembly A6 and B6 while that it being when high potential, to produce modulation signal.Waveform W2_2 is the grid voltage of bridge switch assembly B2.From the above, when modulating, the running controlling diode A4 and B4 makes bridge switch assembly A2 and B2 stop carrying out rectification simultaneously, and namely the grid voltage of bridge switch assembly A2 and B2 should be zero potential, to disconnect bridge switch assembly A2 and B2.But, as shown in the waveform W2_2 of Fig. 2, between modulation period (when namely the signal of switch module A6 and B6 is high potential), the grid of bridge switch assembly B2 still has remaining voltage, zero potential cannot be reached completely, cause bridge switch assembly B2 to disconnect completely, and then make in modulated process, to produce unnecessary power consumption.

From the above, still there is many problems waiting to solve in prior art.Therefore, be necessary to propose a kind of signal modulating method in fact, make powered module more effectively produce modulation signal, overcome above-mentioned shortcoming simultaneously.

Summary of the invention

Therefore, namely main purpose of the present invention is to provide a kind of signal modulating method and signal rectification thereof and modulating device, effectively to produce modulation signal, and solves the problem.

The invention discloses a kind of signal modulating method, for a powered module of an inductive power-supply supply device.This signal modulating method comprises the multiple modulating ranges corresponding to setting one modulation signal; The first end of i-th modulating range to an induction coil of this powered module in the plurality of modulating range is modulated, and wherein i is odd number; And one second end of a jth modulating range to this induction coil of this powered module in the plurality of modulating range is modulated, wherein j is even number; Wherein, or not this second end when modulating this first end, or not this first end when modulating this second end.

The invention also discloses a kind of signal modulating method, for a powered module of an inductive power-supply supply device.This signal modulating method comprises the multiple modulating ranges corresponding to setting one modulation signal; The relatively first end of an induction coil of this powered module or the voltage of one second end and a reference voltage, to produce a comparative result; And according to this comparative result, determine the time point that the plurality of modulating range starts and stops.

The invention also discloses a kind of signal rectification and modulating device, for a powered module of an inductive power-supply supply device, this powered module comprises an induction coil, is used for receiving power supply from a supply module of this inductive power-supply supply device.This rectification and modulating device comprise one first rectifying transistor, one second rectifying transistor, one first rectify control module, one second rectify control module, one first modulation control module, one second modulation control module, a reference voltage generator, a comparator and a processor.This first rectifying transistor is coupled between a first end of this induction coil and a ground end, is used for carrying out rectification to this first end of this induction coil.This second rectifying transistor is coupled between one second end of this induction coil and this ground holds, and is used for carrying out rectification to this second end of this induction coil.This first rectify control module couples is to this first end of this induction coil, this second end and this first rectifying transistor, be used for according to this first end of this induction coil and the voltage of this second end, export one first rectify control signal, carry out rectification to control this first rectifying transistor.This second rectify control module couples is to this first end of this induction coil, this second end and this second rectifying transistor, be used for according to this first end of this induction coil and the voltage of this second end, export one second rectify control signal, carry out rectification to control this second rectifying transistor.This first modulation control module couples, to this first end of this induction coil, is used for carrying out signal madulation to this first end.This second modulation control module couples, to this second end of this induction coil, is used for carrying out signal madulation to this second end.This reference voltage generator is used for generation one reference voltage.This comparator is coupled to this reference voltage generator and this first rectify control module or this second rectify control module, is used for comparing a coil voltage of this reference voltage and this induction coil, to produce a comparative result.This processor is coupled to this comparator, this first rectify control module, this second rectify control module, this first modulation control module and this second modulation control module, be used for according to this comparative result, control this first modulation control module and this second modulation control module and alternately this first end of this induction coil and this second end are modulated.Wherein, this processor is while this first modulation control module of control this first end to this induction coil is modulated, this the second rectifying transistor is disconnected by this second rectify control module, to suspend, rectification is carried out to this second end of this induction coil, while this second modulation control module of control this second end to this induction coil is modulated, disconnect this first rectifying transistor by this first rectify control module, to suspend, rectification is carried out to this first end of this induction coil.

Accompanying drawing explanation

Fig. 1 is the waveform schematic diagram of signal madulation.

Fig. 2 is the signal waveform schematic diagram of a modulating range of signal madulation.

Fig. 3 is the schematic diagram of the powered module of the embodiment of the present invention one.

Fig. 4 A and Fig. 4 B is respectively the schematic diagram of a kind of execution mode of the modulation control module of Fig. 3.

Fig. 5 A and Fig. 5 B is respectively the schematic diagram of a kind of execution mode of the rectify control module of Fig. 3.

Fig. 6 is the schematic diagram of signal waveform when carrying out signal madulation in powered module.

Fig. 7 is the schematic diagram of signal waveform when carrying out signal madulation in powered module.

Fig. 8 A and Fig. 8 B is the schematic diagram of signal waveform when carrying out signal madulation in powered module.

Fig. 9 is the flow chart of the embodiment of the present invention one signal madulation flow process.

Wherein, description of reference numerals is as follows:

W1_1, W1_2, W2_1, W2_2, W6_1, waveform

W6_2、W6_3、W7_1、W7_2、W7_3、

W7_4、W7_5、W7_6、W8_1、W8_2、

W8_3、W8_4、W8_5、W8_6

30 powered modules

300 induction coils

R1, R2 rectify control module

M1, M2 modulation control module

11,21 rectifier diodes

12,22 rectifying transistors

121,221 protection diodes

40 pressurizers

41 electric capacity of voltage regulation

50 power output ends

60 processors

61 rectifier diodes

62 filter capacitors

71 comparators

72 reference voltage generators

The first end of S1 induction coil

Second end of S2 induction coil

S12, S22 rectify control signal

C13, C23 modulator control signal

C14, C24 rectification shutdown signal

VS coil voltage

Vref reference voltage

CR comparative result

13,23 modulation transistors

131,231 modulation load resistance

14,24 rectify control transistors

141,143,241,243 voltage transitions resistance

142,144,242,244 discharge diode is accelerated

145,245 protection diodes

146, transistor is closed in 246 rectifications

90 signal madulation flow processs

900 ~ 916 steps

Embodiment

Please refer to Fig. 3, Fig. 3 is the schematic diagram of the powered module 30 of the embodiment of the present invention one.Powered module 30 can be used for an inductive power-supply supply device, receives power supply in order to a supply module corresponding from inductive power-supply supply device.As shown in Figure 3, powered module 30 comprises an induction coil 300, rectifier diode 11 and 21, rectifying transistor 12 and 22, protection diode 121 and 221, rectify control module R1 and R2, modulation control module M1 and M2, reference voltage generator 72, comparator 71, processor 60, pressurizer 40 and a power output end 50.In addition, be the operating voltage providing processor 60 stable, powered module 30 also comprises rectifier diode 61 and a filter capacitor 62, is arranged on the power input of processor 60.For the input electric power providing pressurizer 40 stable, powered module 30 also comprises the larger electric capacity of voltage regulation 41 of capacitance, is arranged on the power input end of pressurizer 40.

Wherein, induction coil 300 comprises a coil and an electric capacity, and it can carry out resonance with the coil of supply module, and to produce electric power, and feedback modulation signal and data are to feeder ear.Rectifier diode 11 is coupled between the first end S1 of induction coil 300 and power output end 50, by pressurizer 40 out-put supply to power output end 50.Rectifier diode 21 is coupled between the second end S2 of induction coil 300 and power output end 50, by pressurizer 40 out-put supply to power output end 50.Rectifier diode 11 and 21 can respectively at out of phase out-put supply to power output end 50.Rectifying transistor 12 be coupled to induction coil 300 first end S1 and ground hold between, can be used to control induction coil 300 first end S1 carry out rectification.Rectifying transistor 22 be coupled to induction coil 300 the second end S2 and ground hold between, can be used to control induction coil 300 the second end S2 carry out rectification.Rectify control module R1 is coupled to first end S1, the second end S2 and the rectifying transistor 12 of induction coil 300, can according to the voltage of the first end S1 of induction coil 300 and the second end S2, export a rectify control signal S12 to rectifying transistor 12, carry out rectification to control rectifying transistor 12.Rectify control module R2 is coupled to first end S1, the second end S2 and the rectifying transistor 22 of induction coil 300, can according to the voltage of the first end S1 of induction coil 300 and the second end S2, export a rectify control signal S22 to rectifying transistor 22, carry out rectification to control rectifying transistor 22.In this instance, rectifying transistor 12 and 22 is all a N-type metal-oxide half field effect transistor (N-typeMetalOxideSemiconductorField-EffectTransistor, NMOS), therefore can the two ends of conducting rectifying transistor 12 and 22 when rectify control signal S12 and S22 is high potential, the two ends of rectifying transistor 12 and 22 can be disconnected when rectify control signal S12 and S22 is electronegative potential.

Specifically, when the electric current of induction coil 300 exports from rectifier diode 11, the first end S1 of induction coil 300 is high potential, second end S2 is electronegative potential, now according to the first end S1 of induction coil 300 and the electric potential relation of the second end S2, rectify control module R2 meeting conducting rectifying transistor 22, makes electric current can flow to induction coil 300 from ground end, to reach balance; When the electric current of induction coil 300 exports from rectifier diode 21, second end S2 of induction coil 300 is high potential, first end S1 is electronegative potential, now according to the first end S1 of induction coil 300 and the electric potential relation of the second end S2, rectify control module R1 meeting conducting rectifying transistor 12, make electric current can flow to induction coil 300 from ground end, to reach balance.Between protection diode 121 and 221 grids being coupled to rectifying transistor 12 and 22 respectively and ground holds, be used for restriction rectifying transistor 12 and 22 grid voltage within the specific limits.That is, according to the component characteristic of rectifying transistor 12 and 22, protection diode 121 and 221 can lock the upper limit of the grid voltage of rectifying transistor 12 and 22 respectively, withstand voltage and burn to avoid the grid voltage of rectifying transistor 12 and 22 to exceed its assembly.In general, protection diode 121 and 221 can adopt Zener diode (Zenerdiode) to realize, but should as limit.

Please continue to refer to Fig. 3.Modulation control module M1 is coupled to the first end S1 of induction coil 300, can be used to carry out signal madulation to first end S1.Modulation control module M2 is coupled to the second end S2 of induction coil 300, can be used to carry out signal madulation to the second end S2.The running of modulation control module M1 and M2 is controlled by processor 60.Specifically, processor 60, while the first end S1 of control modulation control module M1 to induction coil 300 modulates, can disconnect rectifying transistor 22 by rectify control module R2, carry out rectification to suspend to the second end S2 of induction coil 300; On the other hand, processor 60, while the second end S2 of control modulation control module M2 to induction coil 300 modulates, can disconnect rectifying transistor 12 by rectify control module R1, carry out rectification to suspend to the first end S1 of induction coil 300.Reference voltage generator 72 can be used to generation one reference voltage Vref to comparator 71.Comparator 71 is coupled to reference voltage generator 72 and rectify control module R1, is used for a coil voltage VS of comparison reference voltage Vref and induction coil 300, to produce a comparative result CR, and exports comparative result CR to processor 60.Specifically, comparator 71 can compare the first end S1 of the induction coil 300 or coil voltage VS of the second end S2 and reference voltage Vref, to produce comparative result CR.In the powered module 30 of Fig. 3, an input of comparator 71 is coupled to rectify control module R1, to receive the coil voltage VS of the first end S1 coming from induction coil 300, and itself and reference voltage Vref is compared.In another embodiment, also the input of comparator 71 can be coupled to rectify control module R2, to receive the coil voltage VS of the second end S2 coming from induction coil 300, and itself and reference voltage Vref be compared.

In addition, processor 60 is coupled to comparator 71, rectify control module R1 and R2, modulation control module M1 and M2, be used for according to comparative result CR, control modulation control module M1 and M2 and hocket in the first end S1 of induction coil 300 and the signal madulation running of the second end S2.Specifically, processor 60 can export modulator control signal C13 and C23 respectively, modulates to control modulation control module M1 and M2 respectively at different time.Accordingly, processor 60 also exports rectification shutdown signal C14 and C24 respectively, suspends rectification to control rectify control module R1 and R2 respectively when modulating.Processor 60 can be the processing unit of a microprocessor (Microprocessor), a microcontroller (MicroControllerUnit, MCU) or any type.In addition, pressurizer 40 is controlled by processor 60, can be used to receive the power supply coming from induction coil 300.Electric capacity of voltage regulation 41 is coupled between pressurizer 40 and rectifier diode 11,21, is used for the power supply that stable pressurizer 40 receives.

Be different from prior art, powered module carries out signal madulation at induction coil two ends simultaneously, and the present invention carries out signal madulation in changing of the relative positions mode to induction coil two ends.In other words, in an embodiment of the present invention, processor replaces unlatching two modulation control modules, and to carry out signal madulation to the first end of induction coil and the second end respectively in different modulating interval, its Detailed Operation mode is described as follows.

Please refer to the schematic diagram that Fig. 4 A and Fig. 4 B, Fig. 4 A and Fig. 4 B is respectively the modulation control module M1 of Fig. 3 and a kind of execution mode of M2.As shown in Figure 4 A, modulation control module M1 comprises modulation transistor 13 and a modulation load resistance 131.Modulation transistor 13 is controlled by processor 60, can be used to modulate the first end S1 of induction coil 300.Modulation load resistance 131 is coupled between the first end S1 of modulation transistor 13 and induction coil 300, is used to provide the load needed for modulation.Specifically, the exportable modulator control signal C13 of processor 60, to modulation transistor 13, is turned on or off to control modulation transistor 13.When modulation transistor 13 conducting, the impedance that the first end S1 that can change induction coil 300 holds over the ground, make electrically changing on induction coil 300, above-mentioned electrical change can feed back to feeder ear, and passes through signal resolution and the decoding reduction modulating data of feeder ear.In this instance, modulation transistor 13 is a N-type metal-oxide half field effect transistor, can conducting modulation transistor 13 when modulator control signal C13 is high potential, can disconnect modulation transistor 13 when modulator control signal C13 is electronegative potential.On the other hand, as shown in Figure 4 B, modulation control module M2 comprises modulation transistor 23 and a modulation load resistance 231.Modulation transistor 23 is controlled by processor 60, can be used to modulate the second end S2 of induction coil 300.Modulation load resistance 231 is coupled between the second end S2 of modulation transistor 23 and induction coil 300, is used to provide the load needed for modulation.Similarly, processor 60 controls modulation transistor 23 by modulator control signal C23 and is turned on or off, and Detailed Operation mode with reference to the above-mentioned explanation being relevant to modulation control module M1, can be not repeated herein.

Please refer to the schematic diagram that Fig. 5 A and Fig. 5 B, Fig. 5 A and Fig. 5 B is respectively the rectify control module R1 of Fig. 3 and a kind of execution mode of R2.As shown in Figure 5A, rectify control module R1 comprises a rectify control transistor 14, voltage transitions resistance 141 and 143, accelerates discharge diode 142 and 144, rectification closedown transistor 146 and a protection diode 145.Rectify control transistor 14 is N-type metal-oxide half field effect transistors, and its drain electrode is coupled to rectifying transistor 12, is used for exporting rectify control signal S12 to rectifying transistor 12; Its source electrode is held with being coupled to; Its grid is then connected to the first end S1 of induction coil 300 by voltage transitions resistance 141 and acceleration discharge diode 142, to be controlled by the voltage of the first end S1 of induction coil 300.When 14 conducting of rectify control transistor, rectify control signal S12 can be controlled and arrive zero potential, with complete disconnection rectifying transistor 12.Voltage transitions resistance 141 is coupled between the first end S1 of induction coil 300 and the grid of rectify control transistor 14, can be used to the change in voltage of grid voltage along with the first end S1 of induction coil 300 of control rectify control transistor 14.In addition, accelerating discharge diode 142 is also coupled between the first end S1 of induction coil 300 and the grid of rectify control transistor 14, when the voltage drop of the first end S1 of induction coil 300, the grid voltage that can be used to control rectify control transistor 14 declines fast, to disconnect rectify control transistor 14 fast, and then accelerate to promote rectify control signal S12.In other words, the grid voltage of rectify control transistor 14 can change along with the voltage of the first end S1 of induction coil 300, with conducting rectify control transistor 14 during the voltage rise of the first end S1 at induction coil 300, and then disconnect rectifying transistor 12 to stop at the rectification of first end S1.In addition, the running accelerating discharge diode 142 makes the grid of rectify control transistor 14 can discharge rapidly when the voltage drop of the first end S1 of induction coil 300, to accelerate to disconnect rectify control transistor 14.Thus, the conducting speed of rectifying transistor 12 can be promoted when rectification switches.

Further, voltage transitions resistance 143 is coupled between the second end S2 of induction coil 300 and the drain electrode of rectify control transistor 14, can be used to control rectify control signal S12 along with the voltage of the second end S2 of induction coil 300 change.In addition, accelerate discharge diode 144 and be coupled between the second end S2 of induction coil 300 and the drain electrode of rectify control transistor 14, when the voltage drop of the second end S2 of induction coil 300, can be used to the voltage accelerating to reduce rectify control signal S12.In other words, rectify control signal S12 can change along with the voltage of the second end S2 of induction coil 300, with conducting rectifying transistor 12 during the voltage rise of the second end S2 at induction coil 300, to start to carry out rectification at the first end S1 of induction coil 300.In addition, the running accelerating discharge diode 144 makes rectify control signal S12 can discharge rapidly when the voltage drop of the second end S2 of induction coil 300.Thus, the opening speed of rectifying transistor 12 can be promoted when rectification switches.

Please continue to refer to Fig. 5 A.The drain electrode that transistor 146 is coupled to processor 60 and rectify control transistor 14 is closed in rectification, can when the second end S2 of modulation control module M2 to induction coil 300 modulates, control rectify control signal S12 to continue to disconnect rectifying transistor 12, to suspend, rectification is carried out to the first end S1 of induction coil 300.Specifically, because signal madulation is the low impedance path produced on induction coil 300 over the ground, coil signal is dragged down for during high potential at the first end S1 of induction coil 300 or the second end S2, now the opposite end of induction coil 300 need suspend rectification, causes a large amount of electric current to make it consume excessive power by rectifier diode to avoid the above-mentioned running dragging down coil signal.That is, when the second end S2 of induction coil 300 modulates, first end S1 should suspend rectification; When the first end S1 of induction coil 300 modulates, the second end S2 should suspend rectification.In the case, when processor 60 by modulator control signal C23 conducting modulation transistor 23 to modulate the second end S2 of induction coil 300 time, also synchronously can close transistor 146 by rectification shutdown signal C14 conducting rectification, make rectify control signal S12 drop to zero potential with lasting disconnection rectifying transistor 12.In addition, protection diode 145 is coupled between the grid of rectify control transistor 14 and ground hold, can be used to the grid voltage of restriction rectify control transistor 14 within the specific limits.That is, according to the component characteristic of rectify control transistor 14, the upper limit of the grid voltage of protection diode 145 lockable rectify control transistor 14, withstand voltage and burn to avoid the grid voltage of rectify control transistor 14 to exceed its assembly.In general, protection diode 145 can adopt Zener diode to realize, but should as limit.

On the other hand, as shown in Figure 5 B, rectify control module R2 comprises a rectify control transistor 24, voltage transitions resistance 241 and 243, accelerates discharge diode 242 and 244, rectification closedown transistor 246 and a protection diode 245.Rectify control transistor 24 is N-type metal-oxide half field effect transistors, and its drain electrode is coupled to rectifying transistor 22, is used for exporting rectify control signal S22 to rectifying transistor 22; Its source electrode is held with being coupled to; Its grid is then connected to the second end S2 of induction coil 300 by voltage transitions resistance 241 and acceleration discharge diode 242, to be controlled by the voltage of the second end S2 of induction coil 300.Voltage transitions resistance 241 is coupled between the second end S2 of induction coil 300 and the grid of rectify control transistor 24, can be used to the change in voltage of grid voltage along with the second end S2 of induction coil 300 of control rectify control transistor 24.In addition, accelerating discharge diode 242 is also coupled between the second end S2 of induction coil 300 and the grid of rectify control transistor 24, when the voltage drop of the second end S2 of induction coil 300, the grid voltage that can be used to control rectify control transistor 24 declines fast, to disconnect rectify control transistor 24 fast, and then accelerate to promote rectify control signal S22.Further, voltage transitions resistance 243 is coupled between the first end S1 of induction coil 300 and the drain electrode of rectify control transistor 24, can be used to control rectify control signal S22 along with the voltage of the first end S1 of induction coil 300 change.In addition, accelerate discharge diode 244 and be coupled between the first end S1 of induction coil 300 and the drain electrode of rectify control transistor 24, when the voltage drop of the first end S1 of induction coil 300, can be used to the voltage accelerating to reduce rectify control signal S22.The drain electrode that transistor 246 is coupled to processor 60 and rectify control transistor 24 is closed in rectification, can when the first end S1 of modulation control module M1 to induction coil 300 modulates, control rectify control signal S22 to continue to disconnect rectifying transistor 22, to suspend, rectification is carried out to the second end S2 of induction coil 300.In the case, when processor 60 by modulator control signal C13 conducting modulation transistor 13 to modulate the first end S1 of induction coil 300 time, also synchronously can close transistor 246 by rectification shutdown signal C24 conducting rectification, make rectify control signal S22 drop to zero potential with lasting disconnection rectifying transistor 22.In addition, protection diode 245 is coupled between the grid of rectify control transistor 24 and ground hold, can be used to the grid voltage of restriction rectify control transistor 24 within the specific limits.The Detailed Operation mode being relevant to rectify control module R2 with reference to the above-mentioned explanation for rectify control module R1, can be not repeated herein.

Be different from prior art, rectify control only respectively controls rectifying transistor by single resistance input coil voltage at coil two ends, in an embodiment of the present invention, rectifying transistor is controlled by rectify control module, to promote the speed of rectifying transistor conducting and disconnection when rectification switches, make rectifying transistor its control signal (grid voltage) when disconnecting can reach zero potential completely, during to avoid modulating, rectifying transistor cannot disconnect completely and produce unnecessary power loss simultaneously.Please refer to Fig. 6, Fig. 6 is the schematic diagram of signal waveform when carrying out signal madulation in powered module 30.As shown in Figure 6, waveform W6_1 is the modulator control signal C13 that processor 60 exports modulation control module M1 to, and it also can represent the rectification shutdown signal C24 that processor 60 exports rectify control module R2 to; The rectify control signal S22 that waveform W6_2 exports for rectify control module R2, i.e. the signal of rectifying transistor 22; Waveform W6_3 is the waveform that signal madulation feeds back on feeder ear coil.As shown in Figure 6, when carrying out signal madulation, signal can feed back to power supply coil to produce the change of oscillation amplitude, and cannot continue completely when carrying out signal madulation to disconnect (as shown in the waveform W2_2 of Fig. 2) compared to rectifying transistor in prior art, the present invention can continue when carrying out signal madulation to disconnect rectifying transistor completely, to avoid rectifying transistor to produce extra power loss, and then promote the efficiency of modulation.

It should be noted that the circuit structure according to powered module 30, the present invention can bear ducting capacity when not affecting electric current, reaching rectification fast simultaneously and switching.Specifically, according to the characteristic of metal-oxide half field effect transistor, the transistor that can be used to bear conducting big current often has larger parasitic capacitance, and this parasitic capacitance limits the switch speed of signal; On the other hand, have its signal of less parasitic capacitance have for the transistor of high speed switching capability for grid, its electric current bears ducting capacity must be comparatively weak.In the case, the rectifying transistor (bridge switch assembly A2 and B2 as in U.S. Patent Publication case US2013/0342027A1) that prior art adopts must bear between ducting capacity and rectification switch speed at electric current to be accepted or rejected, and the ability of rectification is restricted.In comparison, in powered module 30 of the present invention, rectifying transistor 12 and 22 can adopt electric current to bear the stronger assembly of ducting capacity, to bear the big current on induction coil 300.Rectification switch speed then assists to promote by rectify control module R1 and R2.That is, rectify control transistor 14 and 24 in rectify control module R1 and R2 can adopt switch speed transistor faster, and produce the effect of repid discharge respectively at the grid of rectify control transistor 14 and 24 and drain electrode end by accelerating discharge diode 142,144,242 and 244, to promote the switch speed of rectify control signal S12 and S22, and then accelerate the switching over of rectifying transistor 12 and 22.Thus, the present invention can bear ducting capacity and rectification switch speed by motor current simultaneously.

As mentioned above, the present invention adopts changing of the relative positions mode to carry out signal madulation to induction coil two ends.For powered module 30, processor 60 can alternately open modulation control module M1 and M2, to carry out signal madulation to the first end S1 of induction coil 300 and the second end S2 respectively in different modulating interval.Specifically, for a modulation signal, processor 60 first can set corresponding multiple modulating ranges.Then, in i-th modulating range in above-mentioned multiple modulating range, processor 60 can control the first end S1 of modulation control module M1 to induction coil 300 and modulate, and wherein i is odd number; In a jth modulating range in above-mentioned multiple modulating range, processor 60 can control the second end S2 of modulation control module M2 to induction coil 300 and modulate, and wherein j is even number.In other words, in powered module 30, when the first end S1 of induction coil 300 is modulated, do not modulate the second end S2, when the second end S2 of induction coil 300 is modulated, do not modulate first end S1.Preferably, the modulating range number that above-mentioned multiple modulating range comprises is even number, makes the first end S1 of induction coil 300 identical with the number of times that the second end S2 carries out signal madulation.

Specifically, in above-mentioned i-th modulating range, processor 60 is coupled to the modulation transistor 13 of the first end S1 of induction coil 300 by modulator control signal C13 conducting, to modulate the first end S1 of induction coil 300; In an above-mentioned jth modulating range, processor 60 is coupled to the modulation transistor 23 of the second end S2 of induction coil 300 by modulator control signal C23 conducting, to modulate the second end S2 of induction coil 300.That is, modulation transistor 13 and 23 alternate conduction is to produce modulation signal.As mentioned above, when one end of induction coil 300 is modulated, its opposite end need suspend rectification, consumes excessive power to avoid commutating circuit to pass through a large amount of electric current.Two ends due to induction coil 300 are modulated in changing of the relative positions mode, and therefore, when modulating, the same time only has one end to stop rectification and the other end can normal output power, on the impact that confession electric output power causes during can reducing signal madulation.In comparison, prior art is often modulated the two ends of induction coil at one time, makes coil two ends need suspend rectification simultaneously, causes rectifier output voltage and decline to a great extent instantaneously and affect power supply fan-out capability.

Please refer to Fig. 7, Fig. 7 is the schematic diagram of signal waveform when carrying out signal madulation in powered module 30.As shown in Figure 7, waveform W7_1 is the modulator control signal C13 that processor 60 exports modulation control module M1 to, waveform W7_2 is the modulator control signal C23 that processor 60 exports modulation control module M2 to, waveform W7_3 is the signal between induction coil 300 coil and electric capacity, waveform W7_4 is the voltage signal of the first end S1 of induction coil 300, waveform W7_5 is the rectify control signal S22 that rectify control module R2 exports rectifying transistor 22 to, waveform W7_6 is the rectify control signal S12 that rectify control module R1 exports rectifying transistor 12 to.In the figure 7, a modulation signal corresponds to 4 modulating ranges, and wherein, the modulation transistor 13 of only conducting modulation control module M1 inside in the 1st and the 3rd modulating range, to carry out signal madulation to the first end S1 of induction coil 300; The modulation transistor 23 of only conducting modulation control module M2 inside in the 2nd and the 4th modulating range, to carry out signal madulation to the second end S2 of induction coil 300.By above-mentioned signal madulation mode, can produce electrically change on coil, it can be fed back to feeder ear and be reduced modulating data again by signal resolution and decoding.In addition, when carrying out signal madulation, the opposite end of induction coil 300 synchronously can suspend rectification, can be found out by waveform W7_5 and W7_6, the control of transistor 146 and 246 is closed by rectification, rectify control signal S12 and S22 can both arrive zero potential completely, to continue to disconnect rectifying transistor 12 and 22 completely, and the rectification at induction coil 300 two ends can not suspend simultaneously, namely put at any time and at least have one end rectification output power, signal madulation is operated and is unlikely to cause too large impact to electric power delivery efficiency.

It should be noted that, carry out the mode of signal madulation compared to existing induction coil two ends simultaneously, dislocation type modulation system of the present invention also can produce obvious signal reflex to feeder ear coil, particularly when larger for electric loading, dislocation type modulation system of the present invention is not more vulnerable to the impact of load, and can maintain its signal madulation effect.

In addition, in the embodiment of Fig. 7, one modulation signal comprises 4 modulating ranges, but in other embodiments, modulation signal can comprise the modulating range of arbitrary number, and the length of modulating range also can adjust arbitrarily according to system requirements, as long as the length of each modulating range is roughly equal.In addition, in the above-described embodiments, processor 60 first starts modulator control signal C13, restart modulator control signal C23, but in other embodiments, also can change the order of startup, namely first start modulator control signal C23, restart modulator control signal C13, and be not limited thereto.

On the other hand, by the running of comparator and reference voltage generator, present invention addresses each modulation signal in prior art and feed back to the change amount signal of feeder ear shortcoming not of uniform size.Being different from prior art appears on the cycle of oscillation of coil to modulation signal randomness, in an embodiment of the present invention, processor detects the time point of induction coil two terminal potential switching by comparator, send modulator control signal with the cycle switched according to current potential (i.e. rectification switching cycle), make each modulation signal all can be mapped to fixing current potential switching cycle.Please refer again to Fig. 3, and for the powered module 30 of Fig. 3.Processor 60 first can set the multiple modulating ranges corresponding to a modulation signal.Then, comparator 71 compares the first end S1 of the induction coil 300 or coil voltage VS corresponding to the second end S2 and reference voltage Vref, to produce comparative result CR, and exports comparative result CR to processor 60.Processor 60, again according to comparative result CR, determines the time point that above-mentioned multiple modulating range starts and stops.Specifically, one input of comparator 71 can receive the grid voltage of the rectify control transistor 14 in rectify control module R1 or the rectify control transistor 24 in rectify control module R2, from the circuit structure of rectify control module R1 and R2, the grid of rectify control transistor 14 and 24 respectively by voltage transitions resistance 141, accelerate discharge diode 142 and voltage transitions resistance 241, accelerate first end S1 and the second end S2 that discharge diode 242 is linked to induction coil 300, its grid voltage also changes along with the coil voltage VS of induction coil 300.In the case, the grid voltage of rectify control transistor 14 and 24 can be mapped to the coil voltage VS of induction coil 300.Another input of comparator 71 then receives reference voltage Vref from reference voltage generator 72, and exports the comparative result of above-mentioned grid voltage and reference voltage Vref at output.Reference voltage Vref should be set in the voltage level between the high potential of the grid voltage of rectify control transistor 14 and 24 and electronegative potential, to judge the current potential height residing for induction coil 300 two ends.

It should be noted that in powered module 30 and only comprise single comparator 71, it is connected to rectify control module R1 to receive the grid voltage of rectify control transistor 14.Due to the first end S1 of induction coil 300 and the switching cycle of the second end S2 identical and current potential height anti-phase each other, therefore comparator 71 only needs cycle and the current potential height of the first end S1 obtaining induction coil 300, is namely equal to the cycle and current potential height that obtain the second end S2.In another embodiment, also comparator 71 can be changed into and be connected to rectify control module R2 to obtain cycle and the current potential height of the second end S2 of induction coil 300, and be not limited thereto.In addition, comparator 71 also obtains coil voltage VS and switching cycle by alternate manner, and is not limited by the mode of rectify control module R1 or R2.

Then, processor 60 according to comparative result CR (it comprises switching cycle and the current potential height at induction coil 300 two ends), can decide the time point that each modulating range starts and stops.Following example illustrates to correspond to the circuit structure of powered module 30 in Fig. 3, and namely comparator 71 compares the situation producing comparative result CR corresponding to the coil voltage VS of the first end S1 of induction coil 300 and reference voltage Vref.Those skilled in the art should know the situation that comparator 71 is connected to the second end S2 of induction coil 300 by inference by the content disclosed in this example.

First, for the multiple modulating ranges corresponding to a modulation signal, processor 60 can set the scheduled time corresponding to each modulating range, in general, the scheduled time that can set corresponding to each modulating range is all identical, and it can be substantially equal to the cycle that several (such as 3 or 4) coil voltage VS switches.Then, when processor 60 receives a signal madulation instruction, current potential residing for the first end S1 height that can judge induction coil 300 according to comparative result CR, and determine the modulating range that whether starts to correspond to first end S1 accordingly, start timer when this modulating range starts simultaneously.When the timing time of timer arrives this scheduled time (through several all after dates), the current potential height residing for first end S1 that processor 60 can judge induction coil 300 according to comparative result CR, and determine whether stop modulating range accordingly.

Specifically, for the time started of modulating range, processor 60 can after receiving signal madulation instruction, judged that by comparative result CR the current potential of the first end S1 of induction coil 300 drops to the time point of the electronegative potential lower than reference voltage Vref, and at this moment between point control modulating range start (modulation transistor 13 namely in conducting modulation control module M1), make the first end S1 of induction coil 300 start when being positioned at electronegative potential to modulate.Similarly, for the dwell time of modulating range, processor 60 also can after the scheduled time arrives, judged that by comparative result CR the current potential of the first end S1 of induction coil 300 drops to the time point of the electronegative potential lower than reference voltage Vref, and at this moment between point control modulating range stop (namely disconnecting the modulation transistor 13 in modulation control module M1), make the first end S1 of induction coil 300 stop when being positioned at electronegative potential modulating.Should be noted, the running of signal madulation is the voltage signal that the modulation transistor 13 and 23 of first end S1 by being coupled to induction coil 300 respectively and the second end S2 drags down first end S1 and the second end S2, in this case, due to the first end S1 of induction coil 300 and the voltage signal approximate square waves of the second end S2, its electronegative potential cannot produce close to zero potential and drag down effect, only has the part of high potential can be subject to modulation impact.In other words, according to comparative result CR, processor 60 can control the running of signal madulation while affect (be not subject to modulation) when corresponding coil voltage VS is electronegative potential to start or end, make signal madulation interval can comprise the switching cycle of complete coil voltage VS, namely coil voltage VS is positioned at the several complete period of high potential.Furthermore, the scheduled time corresponding to each modulating range is all identical, and therefore each modulating range can comprise identical number and the switching cycle of complete coil voltage VS.Thus, each modulation signal all can produce the change amount signal of same magnitude on coil, to promote the accuracy that feeder ear carries out signal differentiation.

On the other hand, the comparative result CR that the voltage of the first end S1 of comparator 71 pairs of induction coils 300 and reference voltage Vref compare and produce also can be used to differentiate the current potential height of the second end S2 of induction coil 300.Specifically, when processor 60 receive one signal madulation instruction and for modulating the second end S2 of induction coil 300 time, current potential residing for the first end S1 height that can judge induction coil 300 according to comparative result CR, and then judge the height of the current potential residing for the second end S2 of induction coil 300, and determine whether start the modulating range corresponding to the second end S2 accordingly, start timer when this modulating range starts simultaneously.When the timing time arrival scheduled time of timer (through several all after dates), the height of the current potential residing for first end S1 that processor 60 can judge induction coil 300 according to comparative result CR, and then judge the height of the current potential residing for the second end S2 of induction coil 300, and determine whether stop modulating range accordingly.As mentioned above, the first end S1 of induction coil 300 and the second end S2 inversion signal each other, when first end S1 is high potential, the second end S2 is electronegative potential, when first end S1 is electronegative potential, the second end S2 is high potential, therefore, the potential state that can be obtained induction coil 300 two ends by single comparator 71 is only needed.

Specifically, for the time started of modulating range, processor 60 can after receiving signal madulation instruction, judged that by comparative result CR the current potential of the first end S1 of induction coil 300 rises to the time point of the high potential higher than reference voltage Vref, and judge that the second end S2 of induction coil 300 is positioned at an electronegative potential accordingly, processor 60 can at this moment between point control modulating range start (modulation transistor 23 namely in conducting modulation control module M2), make the second end S2 of induction coil 300 start when being positioned at electronegative potential to modulate.Similarly, for the dwell time of modulating range, processor 60 also can after the scheduled time arrives, judged that by comparative result CR the current potential of the first end S1 of induction coil 300 rises to the time point of the high potential higher than reference voltage Vref, and judge that the second end S2 of induction coil 300 is positioned at an electronegative potential accordingly, processor 60 can at this moment between point control modulating range stop (namely disconnecting the modulation transistor 23 in modulation control module M2), make the second end S2 of induction coil 300 stop when being positioned at electronegative potential modulating.

Please refer to the schematic diagram that Fig. 8 A and Fig. 8 B, Fig. 8 A and Fig. 8 B is signal waveform when carrying out signal madulation in powered module 30.Fig. 8 A is exaggerated the portion waveshape in Fig. 7, clearly to illustrate the corresponding relation of time point that modulating range starts and terminate and coil voltage VS; Fig. 8 B is then the waveform of multiple modulation signal.As shown in Figure 8 A, waveform W8_1 is the amplification of waveform W7_4, and it represents the voltage signal of the first end S1 of induction coil 300; Waveform W8_2 is the amplification of waveform W7_1, and it represents modulator control signal C13; Waveform W8_3 then represents the comparative result CR that comparator 71 exports.From Fig. 8 A, when the voltage that modulator control signal C13 starts and the time point that stops all occurs in the first end S1 of induction coil 300 is electronegative potential, when namely corresponding comparative result CR exports electronegative potential.In general, the speed switched due to coil voltage VS is quite fast, and the processing delay of processor 60 may cause modulator control signal C13 just to switch to the time point startup of electronegative potential at coil voltage VS or to close, but, as long as modulator control signal C13 starts when the first end S1 of induction coil 300 is positioned at electronegative potential or closes, can guarantee that modulating range comprises complete coil voltage VS switching cycle, namely coil voltage VS is positioned at the several complete period of high potential.For example, in fig. 8 a, modulating range (i.e. the time of modulator control signal C13 conducting modulation transistor 13) includes the complete period that 4 coil voltage VS are positioned at high potential.

In addition, as shown in Figure 8 B, waveform W8_4 and W8_5 is respectively modulator control signal C13 and C23, and the modulation signal that waveform W8_6 then produces for powered module 30 reflexes to the signal of feeder ear again by obtaining after signal resolution processing of circuit.From Fig. 8 B, each modulation signal all comprises the complete and coil voltage VS switching cycle that quantity is identical, and the change amount signal therefore produced on coil is all identical with change kenel, reflexes to the signal waveform that feeder ear obtained by signal resolution also identical.

It should be noted that comparator 71 is except can except the time point of control processor 60 executive signal modulation, also can be used to start or the running of closing process device 60.In the prior art, processor whether arrives operating voltage according to its supply voltage received to determine whether opening.Because the pressurizer of the power output end of powered module need use an electric capacity of voltage regulation, it has sizable capacitance, make to need between electric capacity of voltage regulation and processor to arrange a switch, this switch needed to cut out before processor starts, the time of opening after operating voltage needed for processor improves need be postponed to electric capacity of voltage regulation charging with the electric power avoiding induction coil to connect rectification output, its operating voltage cannot be arrived even and cannot processor be opened.Such as, namely the breaking protection circuit 24 in the powered module 20 of U.S. Patent Publication case US2013/0342027A1 can be used to process the problems referred to above.In comparison, in an embodiment of the present invention, the comparative result CR that processor 60 can export according to comparator 71 determines whether opening.Specifically, when powered module 30 is near an electric supply installation or when being placed on an electric supply installation, electric supply installation can first transmit a small amount of electric power, the induction coil 300 of powered module 30 can start resonance after receiving electric power, namely change in voltage is produced at the two ends of induction coil 300, this change in voltage is sent to comparator 71 by rectify control module R1 or R2, and then produces the comparative result CR of height potential duration switching.Processor 60 after receiving comparative result CR, can judge that powered module 30 is positioned near an electric supply installation, and starts to produce modulation signal to reflex to feeder ear.On the other hand, when the induction coil 300 of powered module 30 leaves feeder ear, induction coil 300 also can stop resonance immediately, even if the electric charge that electric capacity of voltage regulation 41 exists still is enough to for processor 60, by comparator 71, processor 60 still learns that induction coil 300 has stopped receiving electric power, and stop relevant running accordingly.In the case, because processor 60 operates according to comparative result CR, instead of according to the supply voltage that it receives, therefore, in powered module 30 of the present invention, rectifier diode 11 and 21 can directly to pressurizer 40 and power output end 50, and not need to arrange any switch in electric capacity of voltage regulation 41 front end by output power.

In this embodiment, the electric power received due to induction coil 300 does not need by switch, can directly be sent to pressurizer 40 and power output end 50, with the power loss avoiding electric current to be caused by switch after rectification.In addition, in the prior art voltage overshoot decline, because electric capacity of voltage regulation is arranged on switch rear, in the moment of switch conduction, voltage instantaneous can be declined to a great extent because of a large amount of electric power of capacitive absorption, if can cause processor cannot normal operation.In comparison, embodiments of the invention do not need to use switch to come isolated electric capacity of voltage regulation and processor, can avoid the generation of the problems referred to above.

The above-mentioned function mode about powered module 30 can be summarized as a signal madulation flow process 90, as shown in Figure 9.Signal madulation flow process 90 comprises the following steps:

Step 900: start.

Step 902: processor 60 sets the multiple modulating ranges corresponding to a modulation signal.

Step 904: processor 60 is modulated in multiple modulating range.If i-th modulating range (i is odd number), then perform step 906; If a jth modulating range (j is even number), then perform step 910.

Step 906: comparator 71 compares the first end S1 of induction coil 300 or the voltage of the second end S2 and reference voltage Vref, to produce comparative result CR, and according to comparative result CR, determines the time point that i-th modulating range starts and stop.

Step 908: in i-th modulating range, processor 60 is by modulator control signal C13 conducting modulation transistor 13, to modulate the first end S1 of induction coil 300, and drop to zero potential to disconnect rectifying transistor 22 by rectification shutdown signal C24 control rectify control signal S22, and then the rectification of the second end S2 of time-out induction coil 300, then perform step 914.

Step 910: comparator 71 compares the first end S1 of induction coil 300 or the voltage of the second end S2 and reference voltage Vref, to produce comparative result CR, and according to comparative result CR, determines the time point that a jth modulating range starts and stops.

Step 912: in a jth modulating range, processor 60 is by modulator control signal C23 conducting modulation transistor 23, to modulate the second end S2 of induction coil 300, and drop to zero potential to disconnect rectifying transistor 12 by rectification shutdown signal C14 control rectify control signal S12, and then the rectification of the first end S1 of time-out induction coil 300.

Step 914: processor 60 has judged whether the signal madulation in all modulating ranges corresponding to this modulation signal.If so, then step 916 is performed; If not, then step 904 is performed.

Step 916: terminate.

About signal madulation flow process 90 Detailed Operation mode and change with reference to aforementioned explanation, can be not repeated herein.

In sum, the present invention carries out signal madulation by changing of the relative positions mode, namely hocket at the first end of induction coil and the signal madulation of the second end, obvious signal reflex can be produced at feeder ear, and the rectifying transistor being positioned at induction coil two ends does not need to disconnect simultaneously, signal madulation can be reduced on the impact caused for electric output power.In addition, by the running of comparator, the time point of signal madulation can be mapped to the switching cycle of coil voltage, processor can according to the comparative result of comparator, start at particular point in time or stop carrying out signal madulation, make each modulation signal can produce the change amount signal of same magnitude on coil, to promote the accuracy that feeder ear carries out signal differentiation.In addition, processor, also by comparator, determines whether coming into operation according to the switching of coil voltage, instead of is decided by the voltage swing received, and thus need not arrange the operating voltage that switch carrys out control processor between electric capacity of voltage regulation and processor.Moreover by the circuit structure of powered module of the present invention, rectifying transistor can be controlled by rectify control module, bear ducting capacity and high rectification switch speed to realize high electric current simultaneously.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a signal modulating method, for a powered module of an inductive power-supply supply device, described signal modulating method comprises:

Set the multiple modulating ranges corresponding to a modulation signal;

The first end of i-th modulating range to an induction coil of described powered module in described multiple modulating range is modulated, and wherein i is odd number; And

Second end of a jth modulating range to the described induction coil of described powered module in described multiple modulating range is modulated, and wherein j is even number;

Wherein, or not described second end when modulating described first end, or not described first end when modulating described second end.

2. signal modulating method as claimed in claim 1, is characterized in that, also comprise:

In described i-th modulating range, conducting is coupled to one first modulation transistor of the described first end of described induction coil, to modulate the described first end of described induction coil; And

In a described jth modulating range, conducting is coupled to one second modulation transistor of described second end of described induction coil, to modulate described second end of described induction coil.

3. signal modulating method as claimed in claim 2, it is characterized in that, described first modulation transistor and described second modulation transistor alternate conduction, to produce described modulation signal.

4. signal modulating method as claimed in claim 1, it is characterized in that, the modulating range number that described multiple modulating range comprises is even number.

5. signal modulating method as claimed in claim 1, is characterized in that, also comprise:

When modulating described second end of described induction coil, disconnecting one first rectifying transistor being coupled to the described first end of described induction coil, to suspend, rectification being carried out to the described first end of described induction coil; And

When modulating the described first end of described induction coil, disconnecting one second rectifying transistor being coupled to described second end of described induction coil, to suspend, rectification being carried out to described second end of described induction coil.

6. signal modulating method as claimed in claim 1, is characterized in that, also comprise:

The described first end of more described induction coil or the voltage of described second end and a reference voltage, to produce a comparative result; And

According to described comparative result, determine the time point that described multiple modulating range starts and stops.

7. a signal modulating method, for a powered module of an inductive power-supply supply device, described signal modulating method comprises:

Set the multiple modulating ranges corresponding to a modulation signal;

One first end of one induction coil of more described powered module or the voltage of one second end and a reference voltage, to produce a comparative result; And

8. signal modulating method as claimed in claim 7, it is characterized in that, when voltage and the described reference voltage of the described first end of more described induction coil, according to described comparative result, determine that the step of the time point that described multiple modulating range starts and stops comprises:

Set the scheduled time corresponding to each modulating range in described multiple modulating range;

When receiving a signal madulation instruction, judging the height of the current potential residing for described first end of described induction coil according to described comparative result, and determining whether start the modulating range corresponding to described first end in described multiple modulating range accordingly;

When described modulating range starts, start a timer; And

When the timing time of described timer arrives the described scheduled time, judge the height of the current potential residing for described first end of described induction coil according to described comparative result, and determine whether stop described modulating range accordingly.

9. signal modulating method as claimed in claim 8, it is characterized in that, when receiving the instruction of described signal madulation, judging the height of the current potential residing for described first end of described induction coil according to described comparative result, and determining that the step whether starting described modulating range comprises accordingly:

Judged that by described comparative result the current potential of the described first end of described induction coil drops to a time point of the electronegative potential lower than described reference voltage; And

Controlling described modulating range at described time point to start, making the described first end of described induction coil start when being positioned at described electronegative potential to modulate.

10. signal modulating method as claimed in claim 8, it is characterized in that, when the timing time of described timer arrives the described scheduled time, judge the height of the current potential residing for described first end of described induction coil according to described comparative result, and determine whether stop the step of described modulating range to comprise accordingly:

Controlling described modulating range at described time point to stop, making the described first end of described induction coil stop when being positioned at described electronegative potential modulating.

11. signal modulating methods as claimed in claim 7, it is characterized in that, when voltage and the described reference voltage of the described first end of more described induction coil, according to described comparative result, determine that the step of the time point that described multiple modulating range starts and stops comprises:

When receiving a signal madulation instruction, the height of the current potential residing for described first end of described induction coil is judged according to described comparative result, and then judge the height of the current potential residing for described second end of described induction coil, and determine whether start the modulating range corresponding to described second end in described multiple modulating range accordingly;

When described modulating range starts, start a timer; And

When the timing time of described timer arrives the described scheduled time, the height of the current potential residing for described first end of described induction coil is judged according to described comparative result, and then judge the height of the current potential residing for described second end of described induction coil, and determine whether stop described modulating range accordingly.

12. signal modulating methods as claimed in claim 11, it is characterized in that, when receiving the instruction of described signal madulation, the height of the current potential residing for described first end of described induction coil is judged according to described comparative result, and then judge the height of the current potential residing for described second end of described induction coil, and determine that the step whether starting described modulating range comprises accordingly:

Judged that by described comparative result the current potential of the described first end of described induction coil rises to a time point of the high potential higher than described reference voltage;

When the described first end of described induction coil is positioned at described high potential, judge that described second end of described induction coil is positioned at an electronegative potential; And

Controlling described modulating range at described time point to start, making described second end of described induction coil start when being positioned at described electronegative potential to modulate.

13. signal modulating methods as claimed in claim 11, it is characterized in that, when the timing time of described timer arrives the described scheduled time, the height of the current potential residing for described first end of described induction coil is judged according to described comparative result, and then judge the height of the current potential residing for described second end of described induction coil, and determine whether stop the step of described modulating range to comprise accordingly:

Controlling described modulating range at described time point to stop, making described second end of described induction coil stop when being positioned at described electronegative potential modulating.

14. 1 kinds of signal rectifications and modulating device, for a powered module of an inductive power-supply supply device, described powered module comprises an induction coil, is used for receiving power supply from a supply module of described inductive power-supply supply device, and described rectification and modulating device comprise:

One first rectifying transistor, be coupled to described induction coil first end and ground hold between, the described first end being used for controlling described induction coil carries out rectification;

One second rectifying transistor, be coupled to described induction coil the second end and described hold between, described second end being used for controlling described induction coil carries out rectification;

One first rectify control module, be coupled to the described first end of described induction coil, described second end and described first rectifying transistor, be used for according to the described first end of described induction coil and the voltage of described second end, export one first rectify control signal, carry out rectification to control described first rectifying transistor;

One second rectify control module, be coupled to the described first end of described induction coil, described second end and described second rectifying transistor, be used for according to the described first end of described induction coil and the voltage of described second end, export one second rectify control signal, carry out rectification to control described second rectifying transistor;

One first modulation control module, is coupled to the described first end of described induction coil, is used for carrying out signal madulation to described first end;

One second modulation control module, is coupled to described second end of described induction coil, is used for carrying out signal madulation to described second end;

One reference voltage generator, is used for generation one reference voltage;

One comparator, is coupled to described reference voltage generator and described first rectify control module or described second rectify control module, is used for the coil voltage of more described reference voltage and described induction coil, to produce a comparative result; And

One processor, be coupled to described comparator, described first rectify control module, described second rectify control module, described first modulation control module and described second modulation control module, be used for according to described comparative result, control described first modulation control module and described second modulation control module hockets in the described first end of described induction coil and the modulation of described second end;

Wherein, described processor is while the described first end of the described first modulation control module of control to described induction coil is modulated, described second rectifying transistor is disconnected by described second rectify control module, to suspend, rectification is carried out to described second end of described induction coil, while described second end of the described second modulation control module of control to described induction coil is modulated, disconnect described first rectifying transistor by described first rectify control module, to suspend, rectification is carried out to the described first end of described induction coil.

15. signal rectification as claimed in claim 14 and modulating devices, is characterized in that, also comprise:

One first rectifier diode, is coupled between the described first end of described induction coil and a power output end, is used for out-put supply to described power output end; And

One second rectifier diode, is coupled between described second end of described induction coil and described power output end, is used for out-put supply to described power output end.

16. signal rectification as claimed in claim 15 and modulating devices, it is characterized in that, described powered module also comprises:

One pressurizer, is controlled by described processor, is used for receiving the power supply coming from described induction coil; And

One electric capacity of voltage regulation, is coupled between described pressurizer and described first rectifier diode, described second rectifier diode, is used for stablizing the power supply that described pressurizer receives;

Wherein, described first rectifier diode, do not comprise any switch between described second rectifier diode and described electric capacity of voltage regulation.

17. signal rectification as claimed in claim 14 and modulating devices, is characterized in that, also comprise:

One first protection diode, be coupled to described first rectifying transistor grid and described hold between, be used for limiting the grid voltage of described first rectifying transistor within the specific limits; And

One second protection diode, be coupled to described second rectifying transistor grid and described hold between, be used for limiting the grid voltage of described second rectifying transistor within the specific limits.

18. signal rectification as claimed in claim 14 and modulating devices, is characterized in that, described first rectify control module comprises:

One rectify control transistor, be used for controlling described first rectify control signal when conducting and arrive zero potential, described rectify control transistor comprises:

One drain electrode, is coupled to described first rectifying transistor;

One source pole, is coupled to and holds describedly; And

One grid;

One first voltage transitions resistance, is coupled between described second end of described induction coil and the described drain electrode of described rectify control transistor, is used for controlling the change in voltage of described first rectify control signal along with described second end of described induction coil;

One first accelerates discharge diode, is coupled between described second end of described induction coil and the described drain electrode of described rectify control transistor, when the voltage drop of described second end of described induction coil, is used for accelerating to reduce described first rectify control signal;

One second voltage transitions resistance, be coupled between the described first end of described induction coil and the described grid of described rectify control transistor, be used for controlling the change in voltage of grid voltage along with the described first end of described induction coil of described rectify control transistor;

One second accelerates discharge diode, be coupled between the described first end of described induction coil and the described grid of described rectify control transistor, when the voltage drop of the described first end of described induction coil, the described grid voltage being used for controlling described rectify control transistor declines fast, to disconnect described rectify control transistor fast, and then accelerate to promote described first rectify control signal;

Transistor is closed in one rectification, be coupled to the described drain electrode of described processor and described rectify control transistor, when described second end of described second modulation control module to described induction coil is modulated, control described first rectify control signal and disconnect described first rectifying transistor, to suspend, rectification is carried out to the described first end of described induction coil; And

One protection diode, be coupled to described rectify control transistor described grid and described hold between, be used for limiting the described grid voltage of described rectify control transistor within the specific limits.

19. signal rectification as claimed in claim 14 and modulating devices, is characterized in that, described second rectify control module comprises:

One rectify control transistor, be used for controlling described second rectify control signal when conducting and arrive zero potential, described rectify control transistor comprises:

One drain electrode, is coupled to described second rectifying transistor;

One source pole, is coupled to and holds describedly; And

One grid;

One first voltage transitions resistance, is coupled between the described first end of described induction coil and the described drain electrode of described rectify control transistor, is used for controlling the change in voltage of described second rectify control signal along with the described first end of described induction coil;

One first accelerates discharge diode, is coupled between the described first end of described induction coil and the described drain electrode of described rectify control transistor, when the voltage drop of the described first end of described induction coil, is used for accelerating to reduce described second rectify control signal;

One second voltage transitions resistance, be coupled between described second end of described induction coil and the described grid of described rectify control transistor, be used for controlling the change in voltage of grid voltage along with described second end of described induction coil of described rectify control transistor;

One second accelerates discharge diode, be coupled between described second end of described induction coil and the described grid of described rectify control transistor, when the voltage drop of described second end of described induction coil, the described grid voltage being used for controlling described rectify control transistor declines fast, to disconnect described rectify control transistor fast, and then accelerate to promote described second rectify control signal;

Transistor is closed in one rectification, be coupled to the described drain electrode of described processor and described rectify control transistor, when the described first end of described first modulation control module to described induction coil is modulated, control described second rectify control signal and disconnect described second rectifying transistor, to suspend, rectification is carried out to described second end of described induction coil; And

20. signal rectifications as described in claim 18 or 19 and modulating device, it is characterized in that, the electric current of described rectify control transistor bears ducting capacity and is less than described first rectifying transistor and described second rectifying transistor, and switch speed is greater than described first rectifying transistor and described second rectifying transistor.

21. signal rectification as claimed in claim 14 and modulating devices, is characterized in that, described first modulation control module comprises:

One modulation transistor, is controlled by described processor, is used for modulating the described first end of described induction coil; And

One modulation load resistance, between the described first end being coupled to described modulation transistor and described induction coil, is used to provide the load needed for modulation.

22. signal rectification as claimed in claim 14 and modulating devices, is characterized in that, described second modulation control module comprises:

One modulation transistor, is controlled by described processor, is used for modulating described second end of described induction coil; And

One modulation load resistance, between described second end being coupled to described modulation transistor and described induction coil, is used to provide the load needed for modulation.

23. signal rectification as claimed in claim 14 and modulating devices, it is characterized in that, described comparator comprises:

One first input end, is used for a grid voltage of the rectify control transistor receiving described first rectify control module or described second rectify control module, and wherein said grid voltage corresponds to the described coil voltage of described induction coil;

One second input, is used for receiving described reference voltage; And

One output, the size be used for according to described grid voltage and described reference voltage, exports described comparative result to described processor.

24. signal rectification as claimed in claim 14 and modulating devices, is characterized in that, described processor performs following steps, to carry out signal madulation:

Set the multiple modulating ranges corresponding to a modulation signal;

I-th modulating range in described multiple modulating range controls the described first end of described first modulation control module to described induction coil and modulates, and wherein i is odd number; And

A jth modulating range in described multiple modulating range controls described second end of described second modulation control module to described induction coil and modulates, and wherein j is even number;

25. signal rectification as claimed in claim 24 and modulating devices, is characterized in that, described processor alternate conduction is positioned at a modulation transistor of described first modulation control module and described second modulation control module, to produce described modulation signal.

26. signal rectification as claimed in claim 24 and modulating devices, it is characterized in that, described processor also performs following steps, to carry out signal madulation:

27. signal rectification as claimed in claim 14 and modulating devices, is characterized in that, described processor is that the described comparative result exported according to described comparator determines whether being unlocked.