CN102904475B - Inductive power supply and detection method of metallic foreign body thereof - Google Patents
Inductive power supply and detection method of metallic foreign body thereof Download PDFInfo
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Abstract
The invention discloses an inductive power supply used for transmitting the inductive power and detecting whether a metallic foreign body exists. The inductive power supply comprises a processing module for generating a control signal in accordance with a default data and a feedback signal; a drive module for converting a stable voltage source to a drive voltage in accordance with the control signal; an induction coil for electrically transferring the drive voltage for the induction power transmission; and a feedback module for generating the feedback signal in accordance with the drive voltage received by the induction coil, wherein the default data is an initial state of the inductive power supply and a sine wave amplitude corresponding to the drive voltage containing the initial state, and the metallic foreign body influence a sine wave amplitude corresponding to the feedback signal.
Description
Technical field
The present invention relates to a kind of inductive power-supply supply device and detection method of metallic foreign body thereof, particularly relate to and a kind ofly can carry out an induction power transmission job simultaneously and detect whether there is inductive power-supply supply device and the detection method of metallic foreign body thereof of a metallic foreign body.
Background technology
In known technology, associated solenoid induction type electric power system sixty-four dollar question, namely it identification of adaptive ground must be positioned over a rechargeable device transmitting coil being waited for induction power transmission work, wherein the operation principle of similar electromagnetic oven for cooking will be used, and the high-power electromagnetic wave energy of corresponding generation carries out induction power transmission work.In the course of work, when high-power electromagnetic wave energy be received by an extraneous metal time, will because of electromagnetic induction effect make extraneous metal produce heat and cause dangerous doubt.In the case, develop the Ge Jia manufacturer of induction electric power system, the induction technology developing recognizable object will be devoted to, wherein generally adopt the technology of induction coil, namely the wireless data signal setting up a receiving end and a feeder ear transmits, and use a receiving coil of receiving end to carry out feedback data signal, use a transmitting coil of feeder ear to receive data-signal simultaneously, in the case, the wireless transmission method of relative efficiency can be provided, and then the Wireless Data Transmission completed between receiving end and feeder ear and induction power transmission work.
But, when Ge Jia manufacturer is for carrying out induction power transmission work and Wireless Data Transmission simultaneously, because induction power transmission work is that conventional powerful primary carrier transmits, it is vulnerable to the various signal disturbing of external environment, and more difficultly reaches Wireless Data Transmission simultaneously.Also other manufacturer is had under existing induction power transmission work, in conjunction with the work of another Wireless Data Transmission, such as set up Wireless Data Transmission by modes such as infrared ray, bluetooth, RFID label tag, WiFi, correspondence is but but needed to set up wireless transport module, and make production cost increase and reduce market acceptance, therefore selection induction coil is still inclined in current market, and the transmission mechanism that efficiency of arranging in pairs or groups is higher, carry out induction power transmission work and Wireless Data Transmission simultaneously.
Notably, under different induction power transmission work and Wireless Data Transmission, all must, prior to feeder ear utilizing a detection signal, with the rechargeable device of identification receiving end whether correctly, just start to provide induction power transmission work.In other words, when user place on the transmitting coil of feeder ear one cannot feed back metallic foreign body (such as coin, key, the clip etc.) of wireless data signal time, due to feeder ear send detection signal after cannot receive the correct feedback data signal of acquiescence, to the induction power transmission work of feeder ear do not started in the case, produce dangerous doubt to avoid metallic foreign body heating.But, still there is a defect in above-mentioned technology, namely when feeder ear judges to have rechargeable device, and have metallic foreign body part between feeder ear and receiving end when covering the interaction region of transmitting coil and receiving coil, in the case, feeder ear and receiving end will carry out Wireless Data Transmission by non-shaded areas, make metallic foreign body have heating to cause apprehension of danger because of absorption portion electromagnetic energy.
For the problems referred to above, the settling mode of its correspondence has been proposed in the patent of invention specification of Taiwan Patent publication number TW 201143250 " input parasitic metal detects ", it is the difference analyzing the power that the input power of feeder ear and receiving end export is power loss value, is determined as metallic foreign body and then carries out the security control of electric power closedown by excessive power loss.But, power loss is not only have metallic foreign body to cause, when power supply coil and electricity reception coil relative offset, also power loss can be made to increase, therefore the technology of this invention first need define the power loss data of transmitting/receiving coil and other Power Transfer Unit, or the power loss data measured corresponding to all possible metallic foreign body is used as basis for estimation in advance, then compare according to actual power dissipation change detected during running.But, the setting giving tacit consent to the different parameters such as such as driving voltage, component characteristics, wire gauge is still needed before carrying out the method, if when having the above-mentioned default parameters of variation in use procedure, reseted by needs and make the design of the method lacks flexibility, not easily whether correct decision has abnormal metal.In addition, the method still need arrange current detection circuit in feeder ear and receiving end place, the changed power of feeder ear and receiving end is measured with the value of calculating current and voltage, but above-mentioned current detection circuit may the changed power of accurately measuring actual consumption, and the changed power of receiving end also needs to be sent to feeder ear by the mode of transmission of wireless signals calculates in the lump, whether can synchronously settling signal transmission for subsequent calculations, also may there is error accordingly and precisely cannot judge whether the existence of metallic foreign body.
Therefore, provide the more efficient inductive power-supply supply device of one and detection method of metallic foreign body thereof, induction power transmission work can be carried out simultaneously and detect whether there is metallic foreign body, having become the important topic of this area.
Summary of the invention
Therefore, namely main purpose of the present invention is that providing a kind of can carry out induction power transmission work simultaneously and detect the inductive power-supply supply device and the detection method of metallic foreign body thereof that whether there is metallic foreign body.
The present invention discloses a kind of inductive power-supply supply device, and be used for carrying out an induction power transmission job and detect whether there is a metallic foreign body, this inductive power-supply supply device includes an input power module, is used for reception one steady voltage source; One memory module, is used for storage one default data; One processing module, is coupled to this input power module and this memory module, is used for, according to this default data and a feedback signal, producing a control signal; One driver module, is coupled to this input power module and this processing module, is used for according to this control signal, changes this steady voltage source into a driving voltage; One induction coil, is coupled to this driver module, is used for electrically transmitting this driving voltage to one current-collecting device, to carry out this induction power transmission work; And a feedback module, be coupled to this induction coil, be used for this driving voltage received according to this induction coil, produce this feedback signal; Wherein, this default data is an initial condition for this inductive power-supply supply device and the string wave-amplitude included in this initial condition corresponding to this driving voltage, if and carry out existing in this induction power transmission work this metallic foreign body, to the string wave-amplitude corresponding to this feedback signal be affected, and make this processing module correspondence produce this control signal.
The present invention also discloses a kind of method for an inductive power-supply supply device, this inductive power-supply supply device includes a processing module, an induction coil and a default data, be used for carrying out an induction power transmission job and detect in this inductive power-supply supply device whether there is a metallic foreign body simultaneously, the method includes according to a control signal, switches this inductive power-supply supply device and transmits workplace in a setting job and an induction power; And when this inductive power-supply supply device carries out this setting work, this processing module carries out one first workflow, and when this inductive power-supply supply device carries out this setting work, this processing module carries out one second workflow; Wherein, this default data is the initial condition for this inductive power-supply supply device, and form an initial look-up table, this first workflow is that this initial look-up table of this inductive power-supply supply device of amendment is to form an amendment look-up table, this second workflow is according to amendment look-up table, detects in this inductive power-supply supply device whether there is this metallic foreign body.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention one inductive power-supply supply device.
Fig. 2 is the schematic diagram of the electric capacity amplitude curve that produce corresponding to induction coil in the embodiment of the present invention.
Fig. 3 is the schematic diagram of electric capacity and the induction coil corresponding various amplitude curve produced under different steady voltage source in the embodiment of the present invention.
Fig. 4 is the schematic diagram of the various amplitude curve that the equivalent capacitance value of electric capacity and induction coil in the embodiment of the present invention and equivalent inductance value produce when changing.
Fig. 5 is the schematic diagram that in the embodiment of the present invention, electric capacity and induction coil give tacit consent to the amplitude curve having an error range.
Fig. 6 is the schematic diagram of another inductive power-supply supply device of the embodiment of the present invention.
Fig. 7 is the flow chart of the embodiment of the present invention one switching flow.
Fig. 8 is the flow chart of the embodiment of the present invention one first workflow.
Fig. 9 is the flow chart of the embodiment of the present invention one second workflow.
Wherein, description of reference numerals is as follows:
10,60 inductive power-supply supply devices
100 input power modules
1000 receiving elements
102 memory modules
104 processing modules
106 driver modules
1060 driver elements
108 induction coils
110 feedback modules
1110 first detecting units
1112 second detecting units
600 handover modules
602 reminding modules
70 switching flows
700,702,704,706,800,802,804, step
806、808、810、900、902、904、906、
908、910
80 first workflows
90 second workflows
A1, A2, A3, A4, A2_H, A2_L string wave-amplitude
Amax, A1max ~ A4max largest chord wave-amplitude
A2_D lower limit string wave-amplitude
A2_U upper limit string wave-amplitude
CD, CD1 program code
F0, F1, F2, F3, F4 work clock
R1, R2 resistance
SW1, SW2 switching transistor
S_C control signal
S_DV, V1 ~ V4 driving voltage
The humorous vibratory string ripple of S_DV2
S_FB, S_FB1 feedback signal
S_IS initial condition
VIN input voltage
VS steady voltage source
W0, W0_H, W0_L, W1 ~ W4 amplitude curve
W0_D lower limit amplitude curve
W0_U upper limit amplitude curve
Embodiment
Please refer to Fig. 1, Fig. 1 is the schematic diagram of the embodiment of the present invention one inductive power-supply supply device 10.As shown in Figure 1, inductive power-supply supply device 10 includes input power module 100, memory module 102, processing module 104, driver module 106, induction coil 108 and a feedback module 110.Specifically, input power module 100 is coupled to processing module 104 with driver module 106 to receive a steady voltage source VS, dividing potential drop work is carried out again through resistance R1, R2, steady voltage source VS is changed into lower voltage VIN to be sent to processing module 104, using the reference as follow-up work, and directly provide steady voltage source VS to driver module 106, at the same time, a receiving element 1000 of input power module 100 is to change steady voltage source VS to processing module 104 by power supply is used.Memory module 102 includes an initial condition S_IS, and initial condition S_IS is for inductive power-supply supply device 10 carries out the default value of multiple parameter before an induction power transmission job.Processing module 104 is coupled to memory module 102 and feedback module 110, the feedback signal S_FB that the default value being used for receiving multiple parameter in initial condition S_IS produces with feedback module 110, with correspondence generation control signal S_C to driver module 106.One driver element 1060 of driver module 106 is used to reception control signal S_C, with the conducting situation of corresponding control switch transistor SW1, SW2, and then change steady voltage source VS into a driving voltage S_DV, transfer humorous vibratory string ripple S_DV2 to by an electric capacity C again and carry out electromagnetic wave transmission by induction coil 108, and then electric power can be transmitted and the main carrier of simultaneously receiving terminal feedback data signal.Preferably, induction coil 108 includes an equivalent inductance value, being utilize electromagnetic wave induction mode that driving voltage S_DV induction is sent to a receiving end (not shown), such as, is a chargeable product, to carry out the induction power transmission work between inductive power-supply supply device 10 and chargeable product.Feedback module 110 is coupled to induction coil 108 and includes one first detecting unit 1110 and one second detecting unit 1112, wherein the first detecting unit 1110 is by the change of the string wave-amplitude detected corresponding to driving voltage S_DV, be converted to feedback signal S_FB and transfer to processing module 104, and feedback signal S_FB is the voltage signal representing the humorous vibratory string ripple S_DV2 that induction coil 108 uses, detect the feedback data signal from receiving end as the second detecting unit 1112 simultaneously, be another feedback signal S_FB1 with corresponding conversion and transfer to processing module 104, namely feedback signal S_FB1 is the feedback data signal of representative from receiving end.
In simple terms, in the present embodiment, whether have a metallic foreign body according in inductive power-supply supply device 10, the amplitude of the humorous vibratory string ripple S_DV2 corresponding to steady voltage source VS will produce different change situations.Accordingly, the memory module 102 of the present embodiment is previously stored with inductive power-supply supply device 10 conducting but corresponding to driving voltage S_DV the one initial string wave-amplitude not being electrically connected any chargeable electronic product is initial condition S_IS, and be when carrying out induction power transmission work when between inductive power-supply supply device 10 and chargeable product, the change situation of the amplitude of humorous vibratory string ripple S_DV2 changed further now corresponding to steady voltage source VS is feedback signal S_FB by feedback module 110, again by the difference of string wave-amplitude between processing module 104 comparison initial condition S_IS and feedback signal S_FB, be further used as the judgment mechanism whether inductive power-supply supply device 10 carries out induction power transmission work.
Please refer to Fig. 2, Fig. 2 is the schematic diagram of the electric capacity C amplitude curve that produce corresponding to induction coil 108 in the embodiment of the present invention, wherein amplitude curve is shown on a two-dimensional coordinate, and two-dimensional coordinate utilizes multiple work clock as its X-axis, and utilize multiple string wave-amplitude as its Y-axis, work in driving voltage S_DV as electric capacity C and induction coil 108.As shown in Figure 2, because electric capacity C and induction coil 108 equivalent can be considered as the composition of an inductance capacitance and an inductive sensor, and distinguish corresponding equivalent capacitance value and equivalent inductance value by inductance capacitance with inductive sensor, the steady voltage source VS utilizing input power module 100 to receive produces Switching Power Supply clock by driver module 106 and drives the humorous vibratory string ripple S_DV2 of generation, the capacitor and inductor coupling can depicted in two-dimensional coordinate corresponding to induction coil 108 produces an amplitude curve W0, wherein amplitude curve W0 includes a largest chord wave-amplitude Amax and corresponds to a work clock F0, and in order to work conveniently, come on working amplitude curve W0 in setting work clock, user is usually used in and is greater than work clock F0 and avoids producing largest chord wave-amplitude system overload is damaged, work clock F1 such as shown in Fig. 2, F2, F3, F4 and string wave-amplitude A1 can be corresponded to respectively, A2, A3, A4.
Refer again to Fig. 3, Fig. 3 is the schematic diagram of various amplitude curve W1 ~ W4 that in the embodiment of the present invention, electric capacity C is corresponding under different steady voltage source VS produces different driving voltage V1 ~ V4 from induction coil 108, and wherein driving voltage V1 ~ V4 is an ascending series.As shown in Figure 3, when driving voltage is when being increased to V4 gradually by V1, amplitude curve W1 ~ W4 in the largest chord wave-amplitude A1max ~ A4max corresponding to work clock F0 also along Y direction upwards translation and increasing, certainly, if different work clocks, such as, identical increase progressively situation for also having during work clock F2.In the case, the present embodiment is can according to different steady voltage source VS and different work clocks, build on the numerical value of the upper corresponding string wave-amplitude of various amplitude curve W1 ~ W4, and then form a look-up table, and by a non-voltile memory (Non-volatile memory in memory module 102, NVRAM), such as EEPROM carrys out corresponding stored.
Refer again to Fig. 4, Fig. 4 is the schematic diagram of the various amplitude curve that the equivalent capacitance value of electric capacity C and induction coil 108 in the embodiment of the present invention and equivalent inductance value produce when changing.As shown in Figure 4, it is the embodiment be similar to shown in Fig. 2, and under equally induction coil 108 being worked in driving voltage S_DV, on amplitude curve W0, observe steady job clock F2 will have string wave-amplitude A2.Accordingly, when the equivalent capacitance value of electric capacity C and induction coil 108 and equivalent inductance value be increase time, correspondence produces by another amplitude curve W0_H, or can be considered that amplitude curve W0 is amplitude curve W0_H to left, under observing steady job clock F2, amplitude curve W0_H is by another string wave-amplitude A2_H of generation and be less than string wave-amplitude A2, and when the equivalent capacitance value of electric capacity C and induction coil 108 and equivalent inductance value be reduce time, correspondence produces by another amplitude curve W0_L, or can be considered that amplitude curve W0 is amplitude curve W0_L to right translation, under observing steady job clock F2, amplitude curve W0_L is by another string wave-amplitude A2_L of generation and be greater than string wave-amplitude A2.Notably, if when having metallic foreign body between the chargeable product of inductive power-supply supply device 10 and receiving end, namely metallic foreign body is positioned at induction coil 108 reciprocation on an image plane of chargeable product, but do not block when carrying out induction power transmission work and transmission of wireless signals completely between the two, the electromagnetic wave energy of absorption portion makes the inductance value of equivalence decline by metallic foreign body, and then allows corresponding string wave-amplitude become large.Therefore, the present embodiment is can the change situation of string wave-amplitude corresponding to induction coil 108, judge whether that metallic foreign body is between the chargeable product of inductive power-supply supply device 10 and receiving end, using as the judgment mechanism whether proceeding inductive charging work.
Preferably, inductive power-supply supply device 10 provided by the present invention, also can be used for the chargeable product that induction coil 108 is not electrically coupled to any receiving end, and the change situation of amplitude by the first detecting unit 1110 direct-detection humorous vibratory string ripple S_DV2 of feedback module 110, to judge whether person in the scope that any metallic foreign body enters the inductive charging work of inductive power-supply supply device 10, it is also category of the present invention.
Please refer to Fig. 5, Fig. 5 is the schematic diagram that in the embodiment of the present invention, induction coil 108 acquiescence has the amplitude curve of an error range.As shown in Figure 5, the embodiment of continuity shown in Fig. 2, under equally induction coil 108 being worked in driving voltage S_DV, on amplitude curve W0, observe steady job clock F2 have string wave-amplitude A2, in addition, the implied terms of foundation different users's demand or inductive power-supply supply device 10 again, by amplitude curve W0 translation up or down to form another upper limit amplitude curve W0_U and another lower limit amplitude curve W0_D respectively, and there is an a upper limit string wave-amplitude A2_U and lower limit string wave-amplitude A2_D corresponding to steady job clock F2.In the case, upper limit string wave-amplitude A2_U and lower limit string wave-amplitude A2_D are by the corresponding error range be formed under steady job clock F2 on amplitude curve W0, namely inductive power-supply supply device 10 can in induction power transmission work, whether the change situation of the corresponding string wave-amplitude judged corresponding to induction coil 108 exceedes error range, namely whether the change situation of string wave-amplitude is greater than upper limit string wave-amplitude A2_U or is less than lower limit string wave-amplitude A2_D, to judge whether that metallic foreign body is between the chargeable product of inductive power-supply supply device 10 and receiving end, be used as the judgment mechanism whether proceeding inductive charging work.Further, the present embodiment be can by be set forth in W0 on fixed amplitude curve and be fixed as the error range of work clock F2, look-up table in composition graphs 3 embodiment, with application by analogy in various amplitude curve, different operating clock and may correspond under different steady voltage sources to multiple error range, and can be stored in the non-voltile memory of memory module 102, whether proceed the judgment mechanism of inductive charging work in operating as inductive power-supply supply device 10.
Please also refer to the embodiment described in Fig. 1 to Fig. 5, inductive power-supply supply device 10 provided by the present invention, be previously stored with the look-up table of Fig. 3 composition graphs 5 embodiment by memory module 102 and form an error range look-up table, to obtain various amplitude curve, different operating clock and the multiple error ranges under different steady voltage sources, and then the initial condition S_IS providing chargeable product corresponding under specific steady voltage source VS, the voltage being detected the humorous vibratory string ripple S_DV2 of induction coil 108 again by feedback module 110 is feedback signal S_FB, then the simultaneously difference of string wave-amplitude between comparison initial condition S_IS and feedback signal S_FB in processing module 104 again, be further used as the judgment mechanism whether inductive power-supply supply device 10 carries out induction power transmission work.
Please refer to Fig. 6, Fig. 6 is the schematic diagram of another inductive power-supply supply device 60 of the embodiment of the present invention.As shown in Figure 6, processing module 104 also can couple handover module 600 and a reminding module 602 in addition, and memory module 102 has stored a program code CD, processing module 104 is made to perform said procedure code by a conversion system, correspondence obtains the related parameter values such as initial operating voltage data or work clock of the induction coil 108 of inductive power-supply supply device 60, and form the initial condition S_IS that an initial look-up table includes inductive power-supply supply device 60, and this conversion system proposes in the patent of invention specification of Taiwan Patent publication number TW 201123675 " power delivery method of high power wireless induction type power supply unit ", be not repeated herein.In addition, memory module 102 also comprises another program code CD1, and carry out executive program code CD1 by the processing module 104 of inductive power-supply supply device 60, to judge whether current inductive power-supply supply device 60 will carry out setting work or aforesaid induction power transmission work, in this embodiment, above-mentioned handover mechanism is pre-stored within processing module 104 or memory module 102, carries out both switch operatings with corresponding control treatment module 104.Certainly, above-mentioned handover mechanism is also by the corresponding control signal (not shown) receiving user and input voluntarily of a handover module 600, judging whether to carry out setting work or induction power transmission worker with hand-off process module 104, is also category of the present invention.
Further, inductive power-supply supply device 60 the handover mechanism that is suitable for be to be summarized as a switching flow 70, please refer to shown in Fig. 7.Switching flow 70 includes following steps:
Step 700: start.
Step 702: according to the control signal of handover module 600, transmits workplace to switch inductive power-supply supply device 60 in setting work or induction power.
Step 704: when inductive power-supply supply device 60 is when carrying out setting work, processing module 104 executive program code CD1 carries out one first workflow; When inductive power-supply supply device 60 is when carrying out induction power transmission work, processing module 104 executive program code CD1 carries out one second workflow.
Step 706: terminate.
In addition, the operational detail of the first workflow 80 of step 704, can with reference to shown in figure 8.First workflow 80 includes following steps:
Step 800: start.
Step 802: utilize resistance R1, R2 to carry out dividing potential drop work to steady voltage source VS, to be sent to processing module 104 by 1 after dividing potential drop first partial pressure value.
Step 804: the first partial pressure value is stored in memory module 102 by processing module 104, and utilize the first partial pressure value as a data header to set up error range look-up table.
Step 806: according to the first partial pressure value, processing module 104 correspondence setting one work clock value is the most high workload clock value of inductive power-supply supply device 60.
Step 808: the work clock value set by driver module 106 receiving processing module 104, produce driving voltage S_DV with correspondence, and be that the magnitude of voltage of humorous vibratory string ripple S_DV2 is converted to feedback signal S_FB to be stored in memory module 102 by the first detecting unit 1110.
Step 810: according to the magnitude of voltage of humorous vibratory string ripple S_DV2, processing module 104 judges whether feedback signal S_FB exceedes the maximum operating voltage value of feedback module 110.If exceed the maximum operating voltage value of (or equaling) feedback module 110, processing module 104 restarts the work of switching flow 70; If do not exceed the maximum operating voltage value of (namely lower than) feedback module 110, the work clock value that processing module 104 is set under reducing current first partial pressure value, with step 808 again.
Please also refer to switching flow 70 and the first workflow 80, and memory module 102 stores error range look-up table (namely including the initial condition S_IS of inductive power-supply supply device 60).In step 802, when inductive power-supply supply device 60 enters setting work, resistance R1, R2 of input power module 100 will carry out dividing potential drop work to steady voltage source VS, and the first partial pressure value after dividing potential drop is sent to processing module 104.In step 804, first partial pressure value is transferred in memory module 102 by processing module 104 to store, and in the present embodiment, memory module 102 is corresponding data headers first partial pressure value be established as in error range look-up table, using as follow-up use of searching.In step 806, processing module 104(or the control signal according to handover module 600) the current most high workload clock value (or higher work clock value) of to be work clock value under corresponding setting the first partial pressure value be inductive power-supply supply device 60.In step 808, the work clock value set is transferred to driver module 106 by processing module 104, make driver module 106 outputting drive voltage S_DV, humorous vibratory string ripple S_DV2 is produced to drive electric capacity C and induction coil 108, first detecting unit 1110 of feedback module 110 goes back the magnitude of voltage of conversion resonance string ripple S_DV2 is simultaneously feedback signal S_FB, to send back processing module 104 and to store in memory module 102.In step 810, processing module 104 is the magnitudes of voltage according to humorous vibratory string ripple S_DV2, the feedback module 110 maximum operating voltage value that judges whether feedback signal S_FB exceedes (or equaling), the maximum operating voltage value of if current magnitude of voltage is above (or equaling) feedback module 110, processing module 104 stops current setting work by an abort signal (not shown), the work of switching flow 70 of laying equal stress on back; The maximum operating voltage value of if current magnitude of voltage does not exceed (namely lower than) feedback module 110, processing module 104 is work clock values set under reducing current first partial pressure value, and repeat step 808, to record the magnitude of voltage of the humorous vibratory string ripple corresponding to next clock.
Therefore after too much data store, in memory module 102 except can writing the initial condition S_IS of part inductive power-supply supply device 60 in advance, also set up the amplitude curve under current steady voltage source V S adaptive, there is provided user can input different steady voltage source VS further accordingly, set up many amplitude curves in error range look-up table.In other words, user can obtain different clocks and vibratory string wave voltage value corresponding under different steady voltage source and corresponding multiple error ranges (namely setting up multiple data header and its data content in error range look-up table) thereof, carry out newly-increased different parameters data in error range look-up table according to user's demand again simultaneously adaptive, and then the amended initial condition S_IS of chargeable product under specific steady voltage source VS corresponding to inductive power-supply supply device 60 is provided.
In addition, the operational detail of the second workflow 90 of step 704, can with reference to shown in figure 9.Second workflow 90 includes following steps:
Step 900: start.
Step 902: utilize resistance R1, R2 to carry out dividing potential drop work to steady voltage source VS, to be sent to processing module 104 by 1 after dividing potential drop second partial pressure value.
Step 904: processing module 104 judges whether the second partial pressure value conforms to multiple data headers of memory module 102 medial error range-based searching table.If do not conform to, processing module 104 restarts the work of switching flow 70; If conform to, processing module 104 carry out step 906.
Step 906: the work clock value set by driver module 106 receiving processing module 104, driving voltage S_DV is produced with correspondence, and by the first detecting unit 1110, the magnitude of voltage of humorous vibratory string ripple S_DV2 is sent to processing module 104, processing module 104 is the work clocks according to current setting simultaneously, the humorous vibratory string ripple in acquisition memory module 102 corresponding to work clock.
Step 908: processing module 104 judges whether the string wave-amplitude difference between the humorous vibratory string ripple corresponding to humorous vibratory string ripple S_DV2 and work clock exceedes the error range of acquiescence.If do not exceed the error range of acquiescence, processing module 104 restarts the work of switching flow 70; If exceeded the error range of acquiescence, processing module 104 has stopped the induction power transmission work of inductive power-supply supply device 60.
Step 910: terminate.
Please also refer to switching flow 70 and the second workflow 90, and memory module 102 includes amended error range look-up table.In step 902, when inductive power-supply supply device 60 enters induction power transmission work, resistance R1, R2 of input power module 100 will carry out dividing potential drop work to steady voltage source VS, and the second partial pressure value after dividing potential drop is sent to processing module 104.In step 904, processing module 104 will tentatively judge whether the second partial pressure value conforms to multiple data headers of error range look-up table.If neither conform between the second partial pressure value with multiple data header, processing module 104 will return the step 702 of switching flow 70; If the one between the second partial pressure value with multiple data header conforms to, processing module 104 will proceed step 906.In step 906, work clock value set by driver module 106 receiving processing module 104, driving voltage S_DV is produced with correspondence, and by the first detecting unit 1110, the magnitude of voltage of humorous vibratory string ripple S_DV2 is sent back processing module 104, processing module 104 is also according to the work clock of current setting simultaneously, humorous vibratory string ripple in acquisition memory module 102 corresponding to work clock, thinks follow-up comparison work.In step 908, whether the string wave-amplitude difference between the humorous vibratory string ripple judged corresponding to humorous vibratory string ripple S_DV2 and work clock is exceeded the error range of acquiescence by processing module 104.If string wave-amplitude difference does not between the two exceed the error range of acquiescence, processing module 104 will return the step 702 of switching flow 70; If string wave-amplitude difference has between the two exceeded the error range of acquiescence, processing module 104 will produce another abort signal (not shown), proceed induction power transmission work to stop inductive power-supply supply device 60.
In addition, in step 908, when processing module 104 is when judging that inductive power-supply supply device 60 stops induction power transmission work, correspondence is also produced a cue (not shown) by reminding module 602, such as a voice signal or a light signal etc., and then inform that user may have metallic foreign body in inductive power-supply supply device 60, or may exception be there is in the working method of inductive power-supply supply device 60, and need user to carry out a manual correction job.Certainly, those skilled in the art also adaptive revise or set up other prompting mechanism and corresponding circuit module, allow inductive power-supply supply device 60 except pointing out user, also may correspond to the display mode by a display floater, to inform in user's inductive power-supply supply device 60 the assembly person that abnormal position or its corresponding composition may occur, it is also category of the present invention.Certainly, those skilled in the art also can add other handover mechanism (switching signal) according to user's demand, with forward and backward in the first workflow 80 and the second workflow 90 of newly-increased different workflow, completing different workers with adaptive, is also category of the present invention.
In the present embodiment, the initial condition S_IS(prestored in memory module 102 and user are pre-prior to storing relevant parameter in memory module 102, to form an initial error range-based searching table), and to arrange in pairs or groups with carrying out adaptive the first workflow 80 according to the control signal of handover module 600, in inductive power-supply supply device 60 real work, newly-increased various amplitude curve, the related setting (the change situations of the different electric capacity match curves of such as different induction coil) of different operating clock and multiple error range corresponding under different steady voltage sources and receiving end, allow user in practical work process, may correspond to the related data obtaining actual measurement, and then the content of amendment/newly-increased initial error range-based searching table (i.e. initial condition S_IS).Preferably, embodiment provided by the present invention does not limit the working mechanism of transmission of wireless signals further, therefore those skilled in the art's adaptive ground is according to different demand, workplace is transmitted in setting work and induction power, add other control flow/signal, judge whether to carry out transmission of wireless signals with correspondence, inductive power-supply supply device 10,60 can be reached and carry out induction power transmission work and transmission of wireless signals person simultaneously, be all category of the present invention.
In sum, the embodiment of the present invention is to provide a kind of inductive power-supply supply device and detection method of metallic foreign body thereof, with simultaneously in carrying out detecting whether there is metallic foreign body in induction power transmission work.In other words, the present embodiment is the string wave-amplitude difference between string wave-amplitude corresponding under judging the initial condition of string wave-amplitude corresponding in feedback signal and inductive power-supply supply device, when difference has between the two exceeded error range, inductive power-supply supply device will stop induction power transmission work, to avoid extraneous metal foreign matter may being had to enter between the rechargeable device of inductive power-supply supply device and receiving end in induction power transmission work, metallic foreign body is made to avoid overheated and adventurous doubt.
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 (23)
1. an inductive power-supply supply device, be used for carrying out an induction power transmission job and detect whether there is a metallic foreign body, it is characterized in that, this inductive power-supply supply device includes:
One input power module, is used for reception one steady voltage source;
One memory module, is used for storage one default data;
One processing module, is coupled to this input power module and this memory module, is used for, according to this default data and a feedback signal, producing a control signal;
One driver module, is coupled to this input power module and this processing module, is used for according to this control signal, changes this steady voltage source into a driving voltage;
One induction coil, is coupled to this driver module, is used for electrically transmitting this driving voltage to one current-collecting device, to carry out this induction power transmission work; And
One feedback module, is coupled to this induction coil, is used for this driving voltage received according to this induction coil, produces this feedback signal;
Wherein, this default data is an initial condition for this inductive power-supply supply device and the string wave-amplitude included in this initial condition corresponding to this driving voltage, if and carry out existing in this induction power transmission work this metallic foreign body, a string wave-amplitude corresponding to this feedback signal will be affected, this processing module correspondence is made to produce this control signal, to stop this induction power transmission work.
2. inductive power-supply supply device as claimed in claim 1, it is characterized in that, this induction coil also couples an electric capacity to include an equivalent capacitance value and an equivalent inductance value, and this initial condition is according to this equivalent capacitance value and this equivalent inductance value, on the two-dimensional coordinate including multiple work clock and multiple string wave-amplitude, form an amplitude curve, and a transverse axis of this two-dimensional coordinate is the plurality of work clock and a longitudinal axis of this two-dimensional coordinate is the plurality of string wave-amplitude.
3. inductive power-supply supply device as claimed in claim 2, is characterized in that, on this two-dimensional coordinate, when this driving voltage is increase, this amplitude curve is along translation on this Y and a largest chord wave-amplitude of this amplitude curve increases.
4. inductive power-supply supply device as claimed in claim 2, it is characterized in that, when this equivalent capacitance value and this equivalent inductance value be increase time, a string wave-amplitude under this fixing work clock corresponding to this amplitude curve reduces, and when this equivalent capacitance value and this equivalent inductance value be reduce time, the string wave-amplitude under this fixing work clock corresponding to this amplitude curve increases.
5. inductive power-supply supply device as claimed in claim 2, is characterized in that, when this metallic foreign body be positioned at this induction coil a mapped plan on time, under each this work clock, this string wave-amplitude of this feedback signal increases.
6. inductive power-supply supply device as claimed in claim 5, it is characterized in that, this memory module also includes a program code, is used for judging that whether difference between this string wave-amplitude of this feedback signal and this string wave-amplitude of this default data is more than an error range.
7. inductive power-supply supply device as claimed in claim 6, it is characterized in that, this memory module is used to storage one look-up table, and this look-up table includes the plurality of work clock of this two-dimensional coordinate and the plurality of string wave-amplitude and each the plurality of work clock and each this error range corresponding to the plurality of string wave-amplitude.
8. inductive power-supply supply device as claimed in claim 6, it is characterized in that, difference when between this string wave-amplitude of this feedback signal and this string wave-amplitude of this default data is when being greater than this error range, this processing module is generation one first abort signal, makes this inductive power-supply supply device stop this induction power transmission work.
9. inductive power-supply supply device as claimed in claim 6, it is characterized in that, also include a reminding module, the difference when between this string wave-amplitude of this feedback signal and this string wave-amplitude of this default data is when being greater than this error range, and this reminding module is corresponding generation one cue.
10. inductive power-supply supply device as claimed in claim 1, is characterized in that, also include a handover module, is used for generation one switching signal, transmits workplace to switch on this processing module in a setting job and this induction power.
11. inductive power-supply supply devices as claimed in claim 10, is characterized in that, also include a program code in this memory module, are used for comparing an operating voltage of this feedback signal and an operating voltage of this default data.
12. inductive power-supply supply devices as claimed in claim 11, is characterized in that, when this operating voltage of this feedback signal is this operating voltage being greater than this default data, this processing module is that generation one second abort signal is to terminate this set model.
13. inductive power-supply supply devices as claimed in claim 1, it is characterized in that, this memory module also includes a non-voltile memory, corresponding stored has this default data and another program code, and this program code controls this processing module, to be obtained this initial condition of this inductive power-supply supply device by a conversion system.
14. inductive power-supply supply devices as claimed in claim 1, it is characterized in that, no matter whether this induction coil is electrically coupled to this current-collecting device, this feedback module is the change situation of detection one string wave-amplitude, makes this processing module judge whether to carry out this inductive charging work.
15. 1 kinds of methods for an inductive power-supply supply device, this inductive power-supply supply device includes a processing module, an induction coil and a default data, be used for carrying out an induction power transmission job and detect in this inductive power-supply supply device whether there is a metallic foreign body simultaneously, it is characterized in that, the method includes:
Produce a control signal according to a handover module, switch this inductive power-supply supply device and transmit workplace in a setting job and this induction power; And
When this inductive power-supply supply device carries out this setting work, this processing module carries out one first workflow, and when this inductive power-supply supply device carries out this induction power transmission work, this processing module carries out one second workflow;
Wherein, this default data is the initial condition for this inductive power-supply supply device, and form an initial look-up table, this first workflow is that this initial look-up table of this inductive power-supply supply device of amendment is to form an amendment look-up table, this second workflow is according to amendment look-up table, detects in this inductive power-supply supply device whether there is this metallic foreign body.
16. methods as claimed in claim 15, it is characterized in that, this first workflow also includes:
One dividing potential drop work is carried out to a steady voltage source, to produce one first partial pressure value;
Giving tacit consent to this first partial pressure value is a data header, forms this amendment look-up table to increase newly in this initial look-up table;
According to this first partial pressure value, the work clock setting this processing module current is the maximum functional clock for this inductive power-supply supply device;
Transmit this work clock to one driver module, produce a driving voltage to this induction coil with correspondence by this driver module, and changed a voltage signal of this induction coil by a feedback module into a feedback signal; And
Judge whether this voltage signal of this induction coil exceedes a maximum operating voltage of this feedback module, if when this voltage signal of this induction coil does not exceed this maximum operating voltage of this feedback module, reduce this work clock set by this processing module current, form this amendment look-up table with multiple data header newly-increased under this steady voltage source different.
17. methods as claimed in claim 16, it is characterized in that, this second workflow also includes:
This dividing potential drop work is carried out to this steady voltage source, to produce one second partial pressure value; And
Judge whether this second partial pressure value meets the data header in this amendment look-up table, to determine whether continue this second workflow.
18. methods as claimed in claim 17, it is characterized in that, this second workflow also includes:
When determining to proceed this second workflow, this driver module produces this driving voltage to this induction coil according to this work clock of this processing module current, and this feedback module is that this voltage signal of conversion this induction coil current is for this feedback signal is to this processing module;
The string wave-amplitude corresponding to this work clock of this processing module current is captured in this amendment look-up table; And
Judge that whether this feedback signal and the string wave-amplitude difference corresponding to this work clock are more than an error range, when this string wave-amplitude difference is above this error range, this processing module judges to there is this metallic foreign body in this inductive power-supply supply device, and then stop this induction power transmission work.
19. methods as claimed in claim 18, is characterized in that, also include and utilize a reminding module, and when this string wave-amplitude difference is above this error range, this reminding module is corresponding generation one cue.
20. methods as claimed in claim 15, it is characterized in that, this first workflow and this second workflow are also compiled as a program code, and corresponding stored is in a memory module, and perform this program code by this processing module, to carry out this first workflow and this second workflow.
21. methods as claimed in claim 20, is characterized in that, also include a non-voltile memory in this memory module, are used for storing this program code, this initial look-up table and this amendment look-up table.
22. methods as claimed in claim 15, it is characterized in that, this processing module also performs another program code, to be obtained this initial condition of this inductive power-supply supply device by a conversion system, and forms this initial look-up table.
23. methods as claimed in claim 15, it is characterized in that, no matter whether this induction coil is electrically coupled to a current-collecting device, this processing module is the change situation of the string wave-amplitude corresponding to this induction coil, judges whether to carry out this inductive charging work.
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| US13/237,668 | 2011-09-20 | ||
| US13/237,668 US8772979B2 (en) | 2011-02-01 | 2011-09-20 | Method for power self-regulation in a high-power induction type power source |
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| CN102904475A CN102904475A (en) | 2013-01-30 |
| CN102904475B true CN102904475B (en) | 2015-01-21 |
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