WO2018038531A1 - Procédé de détection de matériau étranger, et appareil et système correspondants - Google Patents

Procédé de détection de matériau étranger, et appareil et système correspondants Download PDF

Info

Publication number
WO2018038531A1
WO2018038531A1 PCT/KR2017/009208 KR2017009208W WO2018038531A1 WO 2018038531 A1 WO2018038531 A1 WO 2018038531A1 KR 2017009208 W KR2017009208 W KR 2017009208W WO 2018038531 A1 WO2018038531 A1 WO 2018038531A1
Authority
WO
WIPO (PCT)
Prior art keywords
quality factor
wireless power
foreign matter
value
peak frequency
Prior art date
Application number
PCT/KR2017/009208
Other languages
English (en)
Korean (ko)
Inventor
박재희
Original Assignee
엘지이노텍(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020160117518A external-priority patent/KR102617560B1/ko
Application filed by 엘지이노텍(주) filed Critical 엘지이노텍(주)
Priority to CN202310786573.0A priority Critical patent/CN116799978A/zh
Priority to EP23186848.0A priority patent/EP4239840A3/fr
Priority to EP23186858.9A priority patent/EP4239850A3/fr
Priority to EP23186860.5A priority patent/EP4239852A3/fr
Priority to CN202310799931.1A priority patent/CN116846097A/zh
Priority to CN202310798829.XA priority patent/CN116846096A/zh
Priority to EP23186859.7A priority patent/EP4239851A3/fr
Priority to CN202310790288.6A priority patent/CN116742826A/zh
Priority to EP17843951.9A priority patent/EP3506460B1/fr
Priority to CN202310771314.0A priority patent/CN116707169A/zh
Priority to US16/327,622 priority patent/US11005303B2/en
Priority to CN202310801235.XA priority patent/CN116846098A/zh
Priority to CN202310786288.9A priority patent/CN116722662A/zh
Priority to CN202310798705.1A priority patent/CN116707173A/zh
Priority to CN202210954377.5A priority patent/CN115347688B/zh
Priority to EP23186855.5A priority patent/EP4239847A3/fr
Priority to EP23178399.4A priority patent/EP4236027A3/fr
Priority to CN202310772498.2A priority patent/CN116707170A/zh
Priority to EP23186853.0A priority patent/EP4239845A3/fr
Priority to EP23178394.5A priority patent/EP4236025A3/fr
Priority to EP23186856.3A priority patent/EP4239848A3/fr
Priority to EP23186857.1A priority patent/EP4239849A3/fr
Priority to CN201780052155.1A priority patent/CN109804530B/zh
Priority to EP23186854.8A priority patent/EP4239846A3/fr
Priority to CN202310796517.5A priority patent/CN116742827A/zh
Priority to EP23186849.8A priority patent/EP4239841A3/fr
Priority to CN202310786885.1A priority patent/CN116742825A/zh
Priority to CN202310770617.0A priority patent/CN116707168A/zh
Priority to EP23186850.6A priority patent/EP4239842A3/fr
Priority to CN202310798700.9A priority patent/CN116742829A/zh
Priority to EP23178395.2A priority patent/EP4236026A3/fr
Priority to CN202310798265.XA priority patent/CN116707172A/zh
Priority to EP23186851.4A priority patent/EP4239843A3/fr
Priority to EP23186852.2A priority patent/EP4239844A3/fr
Priority to JP2019511424A priority patent/JP7146737B2/ja
Priority to CN202310797406.6A priority patent/CN116707171A/zh
Priority to EP21159221.7A priority patent/EP3863147A1/fr
Priority to CN202310797901.7A priority patent/CN116742828A/zh
Priority to EP23186847.2A priority patent/EP4239839A3/fr
Priority to CN202310791774.XA priority patent/CN116722663A/zh
Publication of WO2018038531A1 publication Critical patent/WO2018038531A1/fr
Priority to US16/451,947 priority patent/US10862348B2/en
Priority to US17/183,012 priority patent/US11652371B2/en
Priority to JP2022150287A priority patent/JP7525564B2/ja
Priority to US18/181,208 priority patent/US11923699B2/en
Priority to JP2023116940A priority patent/JP2023134708A/ja
Priority to JP2023117038A priority patent/JP2023134721A/ja
Priority to JP2023117028A priority patent/JP2023134718A/ja
Priority to JP2023116957A priority patent/JP2023134710A/ja
Priority to JP2023117036A priority patent/JP2023134720A/ja
Priority to JP2023116950A priority patent/JP2023134709A/ja
Priority to US18/223,449 priority patent/US20230361603A1/en
Priority to JP2023117002A priority patent/JP2023134715A/ja
Priority to US18/223,453 priority patent/US20230361604A1/en
Priority to JP2023116970A priority patent/JP2023134711A/ja
Priority to US18/223,455 priority patent/US20230361605A1/en
Priority to JP2023117009A priority patent/JP2023134716A/ja
Priority to JP2023116997A priority patent/JP2023134714A/ja
Priority to JP2023117026A priority patent/JP2023134717A/ja
Priority to JP2023117031A priority patent/JP2023134719A/ja
Priority to JP2023116992A priority patent/JP2023134713A/ja
Priority to US18/223,457 priority patent/US20230361606A1/en
Priority to JP2023117042A priority patent/JP2023134722A/ja
Priority to US18/223,958 priority patent/US20230361608A1/en
Priority to US18/223,960 priority patent/US20230361609A1/en
Priority to US18/223,966 priority patent/US20230361611A1/en
Priority to US18/223,964 priority patent/US20230361610A1/en
Priority to US18/223,969 priority patent/US20230361613A1/en
Priority to US18/223,967 priority patent/US20230361612A1/en
Priority to US18/224,385 priority patent/US20230361616A1/en
Priority to US18/224,379 priority patent/US20230361614A1/en
Priority to US18/224,388 priority patent/US20230361617A1/en
Priority to US18/224,382 priority patent/US20230361615A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings

Definitions

  • Wireless power transfer technology can be used in various industries, such as the mobile, IT, railroad and consumer electronics industries.
  • the foreign matter detection method further comprises the step of confirming whether or not the detected foreign matter is removed from the charging region, if the detected foreign matter is removed, starting the power transmission to the wireless power receiver. And, the warning alarm can be released.
  • the foreign matter detection status packet may further include mode information, and based on the mode information, it may be identified whether the information on the reference peak frequency is included in the foreign matter detection status packet.
  • the present invention is the foreign matter detection method and apparatus therefor capable of improving the foreign matter detection ability by adaptively performing the foreign matter detection method based on the quality factor and the foreign matter detection method based on the peak frequency according to whether or not the foreign matter detection by each method. And a system.
  • the present invention has an advantage of providing a foreign matter detection method for wireless charging and an apparatus and system therefor.
  • the present invention provides a foreign matter detection method and apparatus therefor capable of detecting foreign matter more accurately by dynamically correcting the quality factor value measured at the time of foreign matter detection in accordance with the degree of movement of the current peak frequency relative to the reference peak frequency.
  • the present invention calculates the slope of the quality factor based on the output voltage level measured at the start frequency and the current peak frequency in the operating frequency band, and compares it with a predetermined quality factor slope threshold value foreign matter that can be detected more accurately It is an advantage to provide a detection method and apparatus and system therefor.
  • FIG. 4 is a state transition diagram for explaining a wireless power transmission procedure according to an embodiment of the present invention.
  • 5A and 5B are state transition diagrams for explaining a wireless power transmission procedure according to an embodiment of the present invention.
  • FIG. 8 is a diagram for describing a method of modulating and demodulating a wireless power signal according to an embodiment of the present invention.
  • FIG. 9 is a diagram for describing a packet format according to an embodiment of the present invention.
  • 15 is a diagram for explaining a message structure of a FOD status packet according to another embodiment of the present invention.
  • a method of detecting a foreign substance in a wireless power transmitter may include measuring a quality factor value corresponding to a reference operating frequency and searching for a current peak frequency having a maximum quality factor value in an operating frequency band when an object is detected. And receiving a foreign matter detection status packet including information on a reference peak frequency from a wireless power receiver, correcting the measured quality factor value by using a difference value between the current peak frequency and the reference peak frequency. And comparing the corrected quality factor value with a predetermined quality factor threshold value to determine the presence of foreign substances.
  • the information exchanged between the wireless power transmitter 10 and the wireless power receiver 20 may include control information as well as status information of each other.
  • the status information and control information exchanged between the transmitting and receiving end will be more clear through the description of the embodiments to be described later.
  • the unidirectional communication may be performed by the wireless power receiver 20 only transmitting information to the wireless power transmitter 10, but is not limited thereto.
  • the wireless power transmitter 10 may transmit information to the wireless power receiver 20. It may be to transmit.
  • the power transmission from the transmitter to the receiver is largely selected in a selection phase 410, a ping phase 420, an identification and configuration phase 430, and a power transmission phase ( Power Transfer Phase 440).
  • the transmitter can transmit a very short pulse of an analog ping signal, which is based on the current change of the transmitting coil to the active area of the charging interface surface, i.e. the chargeable area. It can detect whether an object exists.
  • the selection step 510 is a step of transitioning when a specific error or a specific event is detected while initiating or maintaining power transmission, for example, including reference numerals S502, S504, S508, S510 and S512. Can be.
  • the transmitter may monitor whether an object exists on the interface surface. If the transmitter detects that an object is placed on the interface surface, it may transition to ping step 520. In the selection step 510, the transmitter transmits a very short pulse of an analog ping signal and an object in the active area of the interface surface based on the current change of the transmitting coil or the primary coil. Can detect the presence of
  • FIG. 5B a graph for explaining the change in the measured quality factor value when the wireless power receiver or the foreign material is disposed in the charging region is illustrated in FIG. 5B.
  • the transmitter may transition to identification and configuration step 530 to identify the receiver and collect receiver configuration and status information.
  • the transmitter may enter a negotiation step 540 and perform a predetermined FOD detection procedure.
  • the transmitter may directly enter the power transmission step 560.
  • the transmitter receives an unexpected packet, an outgoing desired packet for a predefined time, or a violation of a preset power transfer contract. transfer contract violation), if the filling is complete, transition to selection step 510.
  • the sensing unit 650 may measure the voltage / current of the DC-converted power and provide the same to the control unit 640. In addition, the sensing unit 650 may measure the internal temperature of the wireless power transmitter 600 to determine whether overheating occurs, and provide the measurement result to the controller 640. For example, the controller 640 may adaptively block power supply from the power supply unit 650 or block power supply to the amplifier 612 based on the voltage / current value measured by the sensing unit 650. Can be. To this end, one side of the power converter 610 may be further provided with a predetermined power cut-off circuit for cutting off the power supplied from the power supply unit 650, or cut off the power supplied to the amplifier 612.
  • the multiplexer 621 may perform a switch function for transferring AC power to the transmission coil selected by the controller 640.
  • the controller 640 may select a transmission coil to be used for power transmission to the corresponding wireless power receiver based on the signal strength indicator received for each transmission coil.
  • the controller 640 may transmit power through time division multiplexing for each transmission coil.
  • three wireless power receivers i.e., the first to third wireless power receivers, are each identified through three different transmitting coils, i.e., the first to third transmitting coils.
  • the controller 640 may control the multiplexer 621 to control AC power to be transmitted only through a specific transmission coil in a specific time slot.
  • the demodulator 632 may demodulate a signal received through the transmission coil 623 and transmit the demodulated signal to the controller 640.
  • the demodulated signal may include a signal strength indicator, but is not limited thereto.
  • the demodulated signal may include various state information of the wireless power receiver.
  • the wireless power transmitter 600 may not only transmit wireless power using the transmission coil unit 622 but also exchange various control signals and state information with the wireless power receiver through the transmission coil unit 622.
  • a separate coil corresponding to each of the first to nth transmitting coils of the transmitting coil unit 622 may be additionally provided in the wireless power transmitter 600, and wireless power may be provided by using the provided separate coil. Note that in-band communication with the receiver may also be performed.
  • the power transmitter 620 of the wireless power transmitter 600 includes a multiplexer 621 and a plurality of transmission coils 622, but this is only one embodiment. It should be noted that the power transmitter 620 according to the embodiment may be composed of one transmitting coil.
  • the sensing unit 750 may measure the intensity of the rectifier 720 output DC power and provide the same to the main controller 770. In addition, the sensing unit 750 may measure the strength of the current applied to the receiving coil 710 according to the wireless power reception, and may transmit the measurement result to the main controller 770. In addition, the sensing unit 750 may measure the internal temperature of the wireless power receiver 700 and provide the measured temperature value to the main controller 770.
  • the main controller 770 may determine that a sensing signal has been received. When the sensing signal is received, a signal strength indicator corresponding to the sensing signal may be modulated. ) To be transmitted to the wireless power transmitter 600.
  • the demodulator 761 demodulates an AC power signal or a rectifier 720 output DC power signal between the receiving coil 710 and the rectifier 720 to identify whether a detection signal is received, and then, the main subject of the identification result. It may be provided to the unit 770. In this case, the main controller 770 may control the signal strength indicator corresponding to the sensing signal to be transmitted through the modulator 762.
  • the wireless power signal is modulated with a specific frequency, as shown by reference numeral 41 of FIG. 1.
  • AC signal may not be.
  • the wireless power signal may be an AC signal modulated by a specific modulation scheme as shown in FIG.
  • the modulation scheme may include, but is not limited to, an amplitude modulation scheme, a frequency modulation scheme, a frequency and amplitude modulation scheme, a phase modulation scheme, and the like.
  • a packet format 900 used for information exchange between the wireless power transmitter 10 and the wireless power receiver 20 may be used for acquiring synchronization for demodulating the packet and identifying the correct start bit of the packet.
  • the packet receiver may identify the size of the message 930 included in the packet based on the header 920 value.
  • the header 920 may be defined in each step of the wireless power transfer procedure, and in part, the header 920 value may be defined to have the same value in different steps of the wireless power transfer procedure.
  • the header values corresponding to the end power transfer of the ping step and the end of the power transfer of the power transfer step may be equal to 0x02.
  • Packets transmitted from the wireless power receiver to the wireless power transmitter may be transmitted using in-band communication using the same frequency band as the frequency band used for wireless power transmission.
  • 11-a is a view for explaining the basic structure of the foreign matter detection device (circuit) mounted on the wireless power transmitter according to an embodiment of the present invention.
  • the demodulator 1196 demodulates a signal received from the wireless power receiver and transmits the demodulated signal to the controller 1197.
  • the demodulator 1196 may demodulate and forward the FOD status packet to the controller 1197.
  • the control unit 1197 may include a reference quality factor value included in the FOD status packet, an operating frequency corresponding to the maximum quality factor value (reference peak frequency), and an operating frequency corresponding to a predetermined value or less than the reference quality factor value—for example,
  • the quality factor threshold value for the corresponding wireless power receiver may be determined based on at least one of operating frequencies at which a quality factor value of 5% or less of the reference quality factor value is measured.
  • the controller 1197 may continue charging or stop charging and return to the selection step according to the determination result of the presence of the foreign matter.
  • the foreign matter detection device 1100 may include a power supply 1101, a DC-DC converter 1110 (optional), an inverter 1120, a resonant circuit 1130, and the like.
  • the foreign matter detection apparatus 1100 according to the present embodiment may be mounted in a wireless power transmission apparatus.
  • the controller 1180 may determine a quality factor threshold and / or a peak frequency threshold for determining whether a foreign substance exists based on at least one of the received reference quality factor value and the reference peak frequency value. For example, a value corresponding to 90% of the reference quality factor value may be determined as the quality factor threshold value, but is not limited thereto.
  • the ratio applied to the threshold value determination may be defined according to the design of a person skilled in the art.
  • the controller 1180 may correct the reference measurement quality factor value Q_measured_reference based on the difference between the current peak frequency F_current_peak value and the reference peak frequency F_reference_peak value. For example, as the value obtained by subtracting the reference peak frequency value from the current peak frequency value may increase the reference measurement quality factor value.
  • a specific correction function which is a factor of the difference between the current peak frequency F_current_peak and the reference peak frequency F_reference_peak, may be predefined.
  • the correction function may be a linear function, but is not limited thereto and may be defined as a non-linear function such as an exponential function.
  • a quality factor correction value corresponding to the degree of movement of the current peak frequency with respect to the reference peak frequency may be configured and maintained in a table in a predetermined recording area of the foreign matter detection apparatus 1100.
  • the controller 1180 may detect the foreign matter disposed in the charging area by comparing the corrected reference measurement quality factor value and the determined quality factor threshold value.
  • the foreign matter detection apparatus 1100 may fail to detect the foreign matter by adaptively correcting the measured quality factor value based on the movement of the peak frequency when an object is detected in the selection step. This has the advantage of significantly lowering the probability.
  • FIG. 12 is a block diagram for explaining the configuration of a foreign matter detection apparatus according to another embodiment of the present invention.
  • the reference quality factor value measured at the reference operating frequency may be different according to the type of the wireless power receiver.
  • the frequency value having the maximum quality factor value in the operating frequency band may vary according to the type of the wireless power receiver.
  • the foreign substance detection apparatus 1200 may fail to detect the foreign substance by adaptively correcting the measured quality factor value based on the movement of the peak frequency when an object is detected in the selection step. This has the advantage of significantly lowering the probability.
  • the foreign matter detection apparatus measures the quality factor values for a plurality of different frequencies in the operating frequency band before entering the ping step 1320, and the measured quality factor values
  • the maximum frequency that is, the current peak frequency (F_current_peak)
  • F_current_peak the current peak frequency
  • the foreign matter detection apparatus may enter the identification and configuration step 1330 to identify the wireless power receiver, and set various configuration parameters for the identified wireless power receiver.
  • the information about the reference quality factor value may refer to a quality factor value measured for a reference operating frequency in a state in which a power of the corresponding wireless power receiver is turned off. When the power of the receiver is turned off, it may mean that power is not delivered to the load.
  • the information on the reference peak frequency value may mean a frequency having the largest quality factor value in the operating frequency band in a state where only the corresponding wireless power receiver is disposed in the charging region of the predetermined wireless power transmitter.
  • the wireless power receiver stores the reference peak frequency value in advance and may transmit it to the wireless power transmitter in the negotiation phase.
  • the foreign matter detection apparatus may determine whether there is a foreign matter by comparing the quality factor threshold value and the measured quality factor value.
  • the foreign matter detection apparatus may enter the power transmission step 1350 to initiate wireless charging of the corresponding wireless power receiver.
  • the foreign matter detection apparatus may determine the peak frequency threshold based on the reference peak frequency value.
  • the wireless power transmitter may determine the current quality factor value and the peak frequency (the frequency at which the maximum quality factor value is measured within the measured frequency range) through the quality factor measurement, and store them in a memory.
  • the wireless power transmitter may determine that the foreign matter does not exist. At this time, a next step (ex calibration or power transfer) for wireless power transfer may be performed.
  • the wireless power transmitter may further determine whether there is a foreign substance based on the received information about the reference peak frequency.
  • the wireless power transmitter may determine the peak frequency threshold using the reference peak frequency value.
  • the wireless power transmitter may compare the peak frequency threshold with the current peak frequency, and determine that there is a foreign substance when the current peak frequency is greater than or equal to the peak frequency threshold. On the other hand, in the following case, if the current peak frequency is less than the peak frequency threshold, the wireless power transmitter may determine that there is no foreign matter.
  • the procedure for determining the presence of foreign matter based on the quality factor value and the procedure for determining the presence of foreign matter based on the peak frequency may be reversed. That is, after the foreign material presence determination based on the peak frequency is first performed, the foreign matter detection capability can be further improved by further performing the determination of the presence of the foreign matter based on the quality factor value.
  • the wireless power transmitter may measure a quality factor value of the resonant circuit.
  • the quality factor value of the resonant circuit may mean an amplification ratio of the input / output voltage by the resonant capacitor when AC power of a specific frequency is applied to the resonant circuit. This may be referred to the description of FIGS. 11-A and 11-B above. In this case, a quality factor value for each frequency may be measured within an operating frequency range of the wireless power transmitter.
  • the wireless power transmitter may store the quality factor value measured for each frequency in a predetermined memory.
  • the wireless power transmitter may determine the quality factor threshold based on the received reference quality factor value.
  • the wireless power transmitter may determine whether there is a foreign substance using the quality factor threshold value and the measured quality factor value.
  • the measured quality factor value may use a quality factor value measured at a frequency corresponding to the received reference peak frequency. Since the measured quality factor value for each frequency is stored in the memory, the wireless power transmitter may identify a frequency corresponding to the received reference peak frequency and read the measured quality factor value corresponding to the identified frequency from the memory.
  • the mode 1402 field when the mode 1402 field is set to binary '00', all bits of the first data 1401 field are written as 0, corresponding to the reference quality factor value 1403 field. Information corresponding to the reference quality factor value measured and determined while the power receiver is turned off is recorded.
  • the mode 1402 field if the mode 1402 field is set to binary '01', the first data 1401 field has a frequency having the largest quality factor value in the operating frequency band while only the corresponding wireless power receiver is disposed in the charging region. Information corresponding to a reference peak frequency value is recorded. In this case, in the reference quality factor value 1403 field, information corresponding to the reference quality factor value measured and determined while the power of the corresponding wireless power receiver is turned off may be recorded. The resolution of the reference peak frequency value recorded in the first data 1401 may be determined based on the size of the operating frequency band.
  • the wireless power transmitter may determine that a foreign substance exists.
  • the wireless power transmitter may determine whether there is a foreign substance through method 2.
  • the reference value 1503 field means a frequency having the largest quality factor value in the operating frequency band while only the corresponding wireless power receiver is disposed in the charging region.
  • Information corresponding to a reference peak frequency value may be recorded.
  • the reference peak frequency may be searched in a state in which a foreign material is not disposed in the charging region and only a wireless power receiver in which the power is off exists.
  • the apparatus for transmitting power wirelessly measures a quality factor value corresponding to a reference operating frequency based on a difference between a reference peak frequency value and a current peak frequency value included in a FOD status packet received in a negotiation step, that is, a reference measurement quality factor value. - May be corrected (or compensated) (S1606).
  • the apparatus for transmitting power wirelessly may compare the corrected reference measurement quality factor value with the determined quality factor threshold to determine whether there is a foreign substance (S1607).
  • FIG. 17 is a table of experimental results for explaining a change of a peak frequency according to a reference peak frequency for each receiver type and a foreign material arrangement according to an embodiment of the present invention.
  • the measured quality factor value is reduced compared to the quality factor value measured when only the receiver is disposed when both the receiver and the foreign matter are present in the charging area.
  • FIG. 18 is a graph showing experimental results showing changes in quality factor values and peak frequencies according to foreign material arrangement in a wireless charging system according to the present invention.
  • the output voltage measuring unit 1920 may measure an output voltage level at a specific frequency within an operating frequency band.
  • the frequency at which the output voltage level is measured may include at least one of a start frequency F_start of the operating frequency band, a found current peak frequency, and an end frequency F_end of the operating frequency band.
  • the output voltage level may be the strength of the voltage applied to the transmitting coil of the resonant circuit, but is not limited thereto, and the position at which the output voltage level is measured may be different according to the design of a person skilled in the art.
  • the quality factor slope determiner 1930 may calculate a quality factor slope based on a voltage value for each specific frequency measured by the output voltage measurer 1920.
  • the output voltage level measured at the start frequency and the output voltage level measured at the current peak frequency will be referred to as V_start 'and Vc', respectively.
  • the quality factor slope (Q_slope ') is shown in the reference numeral 2020 of FIG. 20 to be described later, the following formula:
  • the foreign matter detection unit 1940 may determine whether there is a foreign matter by comparing the calculated first quality factor slope with a predefined first quality factor slope threshold.
  • the first quality factor slope threshold value may have a positive value.
  • the first quality factor slope threshold may be included in the foreign object detection status packet of FIG. 15 and received from the wireless power receiver.
  • the first quality factor slope threshold may be recorded in the reference value field, but this is only an example, and a new field for recording the first quality factor slope threshold in the foreign matter detection status packet may be defined. have.
  • the absolute value of the quality factor slope calculated when only the receiver is disposed in the charging region is greater than the absolute value of the quality factor slope calculated when both the receiver and the foreign matter are arranged.
  • the first quality factor slope threshold may be the same value for all wireless power receivers.
  • the first quality factor slope threshold may be directly received from a corresponding wireless power receiver through a communication unit (not shown).
  • the foreign matter detection apparatus 1900 is a first quality factor slope threshold value or (and) a second quality factor slope through a Foreign Object Detection (FOD) Status Packet (FOD) received from the wireless power receiver in a negotiation step.
  • the threshold value can be obtained.
  • the controller 1950 controls the overall operation of the foreign matter detection apparatus 1900, when foreign matter is detected by the foreign matter detection unit 1940, suspends power transmission to the corresponding wireless power receiver, and foreign matter exists in the charging region.
  • An alarm unit (not shown) provided to output a predetermined warning alarm indicating may be controlled.
  • the controller 1950 may monitor whether the detected foreign matter is removed from the charging area after outputting the warning alarm. As a result of the monitoring, when the foreign matter is removed, the controller 1950 may release the warning alarm and control the power transmission to the corresponding wireless power receiver to be resumed.
  • the apparatus for transmitting power wirelessly may detect an object disposed in the charging region.
  • the frequency offset (or number of frequencies) for determining frequencies at which the quality factor value is measured for the current peak frequency search in the operating frequency band may vary according to the design of those skilled in the art.
  • the operating frequency band may differ depending on the design of the wireless charging system and the standards applied.
  • the apparatus for transmitting power wirelessly may measure output voltage levels corresponding to a start frequency and a current peak frequency of an operating frequency band, respectively (S2103).
  • the wireless power transmitter may enter the power transmission step and start charging the corresponding wireless power receiver (S2106 and S2108).
  • the apparatus for transmitting power wirelessly may detect an object disposed in the charging area in the selection step (S2111).
  • the frequency offset (or number of frequencies) for determining frequencies at which the quality factor value is measured for the current peak frequency search in the operating frequency band may vary according to the design of those skilled in the art.
  • the operating frequency band may differ depending on the design of the wireless charging system and the standards applied.
  • the foreign matter detection status packet may have a field for transmitting information on a value of an angle unit corresponding to the quality factor slope threshold value or the quality factor slope threshold value. It may include.
  • the wireless power transmitter may stop transmitting the power signal and may control to output a predetermined warning alarm indicating that the foreign matter has been detected (S2116 and S2117).
  • the wireless power transmitter may enter the power transmission step and start charging the corresponding wireless power receiver (S2116 and S2118).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention porte sur un procédé de détection de matériau étranger, et sur un appareil et un système correspondants. Selon un mode de réalisation, ledit procédé de détection de matériau étranger dans un émetteur de puissance sans fil comprend les étapes consistant : à mesurer, lorsqu'un objet est détecté, une valeur de facteur de qualité correspondant à une fréquence de fonctionnement de référence; à rechercher une fréquence d'amplitude maximale actuelle possédant une valeur de facteur de qualité maximale dans une bande de fréquence de fonctionnement; à recevoir, en provenance d'un récepteur de puissance sans fil, un paquet d'état de détection de matériau étranger comportant des informations relatives à une fréquence d'amplitude maximale de référence; à corriger la valeur de facteur de qualité mesurée à l'aide d'une valeur de différence entre la fréquence d'amplitude maximale actuelle et la fréquence d'amplitude de référence; et à déterminer si le matériau étranger existe par comparaison de la valeur de facteur de qualité corrigée à une valeur seuil de facteur de qualité prédéterminée. Par conséquent, l'invention prossède l'avantage de permettre une détection plus précise et efficace d'un matériau étranger.
PCT/KR2017/009208 2016-08-23 2017-08-23 Procédé de détection de matériau étranger, et appareil et système correspondants WO2018038531A1 (fr)

Priority Applications (72)

Application Number Priority Date Filing Date Title
CN202310786573.0A CN116799978A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP23186848.0A EP4239840A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
EP23186858.9A EP4239850A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
EP23186860.5A EP4239852A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
CN202310799931.1A CN116846097A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
CN202310798829.XA CN116846096A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP23186859.7A EP4239851A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
CN202310790288.6A CN116742826A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP17843951.9A EP3506460B1 (fr) 2016-08-23 2017-08-23 Procédé de détection de matériau étranger, et emetteur de puissance sans fil
CN202310771314.0A CN116707169A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
US16/327,622 US11005303B2 (en) 2016-08-23 2017-08-23 Method for detecting foreign material, and apparatus and system therefor
CN202310801235.XA CN116846098A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
CN202310786288.9A CN116722662A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
CN202310798705.1A CN116707173A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
CN202210954377.5A CN115347688B (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP23186855.5A EP4239847A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
EP23178399.4A EP4236027A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matériau étranger et appareil et système associés
CN202310772498.2A CN116707170A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP23186853.0A EP4239845A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
EP23178394.5A EP4236025A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matériau étranger et appareil et système associés
EP23186856.3A EP4239848A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
EP23186857.1A EP4239849A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
CN201780052155.1A CN109804530B (zh) 2016-08-23 2017-08-23 用于检测异物的方法及其设备和系统
EP23186854.8A EP4239846A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
CN202310796517.5A CN116742827A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP23186849.8A EP4239841A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
CN202310786885.1A CN116742825A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
CN202310770617.0A CN116707168A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP23186850.6A EP4239842A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
CN202310798700.9A CN116742829A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP23178395.2A EP4236026A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matériau étranger et appareil et système associés
CN202310798265.XA CN116707172A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP23186851.4A EP4239843A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
EP23186852.2A EP4239844A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
JP2019511424A JP7146737B2 (ja) 2016-08-23 2017-08-23 異物質検出方法及びそのための装置及びシステム
CN202310797406.6A CN116707171A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP21159221.7A EP3863147A1 (fr) 2016-08-23 2017-08-23 Procédé de détection de matériau étranger et appareil et système associés
CN202310797901.7A CN116742828A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
EP23186847.2A EP4239839A3 (fr) 2016-08-23 2017-08-23 Procédé de détection de matière étrangère, et appareil et système associés
CN202310791774.XA CN116722663A (zh) 2016-08-23 2017-08-23 无线电力接收器以及用于控制无线电力接收器的方法
US16/451,947 US10862348B2 (en) 2016-08-23 2019-06-25 Method for detecting foreign material, and apparatus and system therefor
US17/183,012 US11652371B2 (en) 2016-08-23 2021-02-23 Method for detecting foreign material, and apparatus and system therefor
JP2022150287A JP7525564B2 (ja) 2016-08-23 2022-09-21 異物質検出方法及びそのための装置及びシステム
US18/181,208 US11923699B2 (en) 2016-08-23 2023-03-09 Method for detecting foreign material, and apparatus and system therefor
JP2023116940A JP2023134708A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
JP2023117038A JP2023134721A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
JP2023117028A JP2023134718A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
JP2023116957A JP2023134710A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
JP2023117036A JP2023134720A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
JP2023116950A JP2023134709A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
US18/223,449 US20230361603A1 (en) 2016-08-23 2023-07-18 Method for detecting foreign material, and apparatus and system therefor
JP2023117002A JP2023134715A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
US18/223,453 US20230361604A1 (en) 2016-08-23 2023-07-18 Method for detecting foreign material, and apparatus and system therefor
JP2023116970A JP2023134711A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
US18/223,455 US20230361605A1 (en) 2016-08-23 2023-07-18 Method for detecting foreign material, and apparatus and system therefor
JP2023117009A JP2023134716A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
JP2023116997A JP2023134714A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
JP2023117026A JP2023134717A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
JP2023117031A JP2023134719A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
JP2023116992A JP2023134713A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
US18/223,457 US20230361606A1 (en) 2016-08-23 2023-07-18 Method for detecting foreign material, and apparatus and system therefor
JP2023117042A JP2023134722A (ja) 2016-08-23 2023-07-18 異物質検出方法及びそのための装置及びシステム
US18/223,958 US20230361608A1 (en) 2016-08-23 2023-07-19 Method for detecting foreign material, and apparatus and system therefor
US18/223,960 US20230361609A1 (en) 2016-08-23 2023-07-19 Method for detecting foreign material, and apparatus and system therefor
US18/223,966 US20230361611A1 (en) 2016-08-23 2023-07-19 Method for detecting foreign material, and apparatus and system therefor
US18/223,964 US20230361610A1 (en) 2016-08-23 2023-07-19 Method for detecting foreign material, and apparatus and system therefor
US18/223,969 US20230361613A1 (en) 2016-08-23 2023-07-19 Method for detecting foreign material, and apparatus and system therefor
US18/223,967 US20230361612A1 (en) 2016-08-23 2023-07-19 Method for detecting foreign material, and apparatus and system therefor
US18/224,385 US20230361616A1 (en) 2016-08-23 2023-07-20 Method for detecting foreign material, and apparatus and system therefor
US18/224,379 US20230361614A1 (en) 2016-08-23 2023-07-20 Method for detecting foreign material, and apparatus and system therefor
US18/224,388 US20230361617A1 (en) 2016-08-23 2023-07-20 Method for detecting foreign material, and apparatus and system therefor
US18/224,382 US20230361615A1 (en) 2016-08-23 2023-07-20 Method for detecting foreign material, and apparatus and system therefor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20160106789 2016-08-23
KR10-2016-0106789 2016-08-23
KR10-2016-0117518 2016-09-12
KR1020160117518A KR102617560B1 (ko) 2016-08-23 2016-09-12 이물질 검출 방법 및 그를 위한 장치 및 시스템

Related Child Applications (3)

Application Number Title Priority Date Filing Date
US16/327,622 A-371-Of-International US11005303B2 (en) 2016-08-23 2017-08-23 Method for detecting foreign material, and apparatus and system therefor
US16/451,947 Continuation US10862348B2 (en) 2016-08-23 2019-06-25 Method for detecting foreign material, and apparatus and system therefor
US17/183,012 Continuation US11652371B2 (en) 2016-08-23 2021-02-23 Method for detecting foreign material, and apparatus and system therefor

Publications (1)

Publication Number Publication Date
WO2018038531A1 true WO2018038531A1 (fr) 2018-03-01

Family

ID=61245178

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2017/009208 WO2018038531A1 (fr) 2016-08-23 2017-08-23 Procédé de détection de matériau étranger, et appareil et système correspondants

Country Status (1)

Country Link
WO (1) WO2018038531A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020003314A1 (fr) 2018-06-27 2020-01-02 Powermat Technologies Ltd. Procédé amélioré de détection d'objets étrangers
WO2020015746A1 (fr) * 2018-07-19 2020-01-23 Mediatek Singapore Pte. Ltd. Détection d'objets étrangers dans des systèmes de transfert de puissance sans fil
JP2020137411A (ja) * 2019-02-19 2020-08-31 エルジー エレクトロニクス インコーポレイティド 無線電力伝送装置及びその制御方法
CN112136263A (zh) * 2018-05-16 2020-12-25 Lg 伊诺特有限公司 无线功率传输控制方法和装置
US11496000B2 (en) 2018-07-19 2022-11-08 Mediatek Singapore Pte. Ltd. Detecting foreign objects in wireless power transfer systems
US12126188B2 (en) 2018-05-16 2024-10-22 Lg Innotek Co., Ltd. Method and apparatus for controlling wireless power transmission

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140084857A1 (en) * 2012-09-27 2014-03-27 ConvenientPower HK Ltd. Methods And Systems For Detecting Foreign Objects In A Wireless Charging System
KR20140113147A (ko) * 2013-03-15 2014-09-24 주식회사 한림포스텍 무선 전력 전송 시스템에서 이물질 감지 장치 및 방법
KR20150003408A (ko) * 2010-06-30 2015-01-08 파나소닉 주식회사 비접촉 급전 시스템 및 비접촉 급전 시스템의 금속 이물질 검출 장치
KR20150059069A (ko) * 2013-11-21 2015-05-29 엘지전자 주식회사 무선 전력 전송 장치 및 그 제어 방법
KR20160022823A (ko) * 2013-06-19 2016-03-02 르네사스 일렉트로닉스 가부시키가이샤 송전 장치, 비접촉 급전 시스템 및 제어 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150003408A (ko) * 2010-06-30 2015-01-08 파나소닉 주식회사 비접촉 급전 시스템 및 비접촉 급전 시스템의 금속 이물질 검출 장치
US20140084857A1 (en) * 2012-09-27 2014-03-27 ConvenientPower HK Ltd. Methods And Systems For Detecting Foreign Objects In A Wireless Charging System
KR20140113147A (ko) * 2013-03-15 2014-09-24 주식회사 한림포스텍 무선 전력 전송 시스템에서 이물질 감지 장치 및 방법
KR20160022823A (ko) * 2013-06-19 2016-03-02 르네사스 일렉트로닉스 가부시키가이샤 송전 장치, 비접촉 급전 시스템 및 제어 방법
KR20150059069A (ko) * 2013-11-21 2015-05-29 엘지전자 주식회사 무선 전력 전송 장치 및 그 제어 방법

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12119671B2 (en) 2018-05-16 2024-10-15 Lg Innotek Co., Ltd. Method and apparatus for controlling wireless power transmission
CN112136263A (zh) * 2018-05-16 2020-12-25 Lg 伊诺特有限公司 无线功率传输控制方法和装置
US12126188B2 (en) 2018-05-16 2024-10-22 Lg Innotek Co., Ltd. Method and apparatus for controlling wireless power transmission
US12021395B2 (en) 2018-05-16 2024-06-25 Lg Innotek Co., Ltd. Method and apparatus for controlling wireless power transmission
US12095288B2 (en) 2018-05-16 2024-09-17 Lg Innotek Co., Ltd. Method and apparatus for controlling wireless power transmission
WO2020003314A1 (fr) 2018-06-27 2020-01-02 Powermat Technologies Ltd. Procédé amélioré de détection d'objets étrangers
CN112715007A (zh) * 2018-06-27 2021-04-27 鲍尔马特技术有限公司 增强的异物检测方法
WO2020015746A1 (fr) * 2018-07-19 2020-01-23 Mediatek Singapore Pte. Ltd. Détection d'objets étrangers dans des systèmes de transfert de puissance sans fil
CN111052541A (zh) * 2018-07-19 2020-04-21 联发科技（新加坡）私人有限公司 无线功率传输系统之异物侦测
US11496000B2 (en) 2018-07-19 2022-11-08 Mediatek Singapore Pte. Ltd. Detecting foreign objects in wireless power transfer systems
CN111052541B (zh) * 2018-07-19 2023-09-29 联发科技（新加坡）私人有限公司 无线功率传输系统之异物侦测
US11984736B2 (en) 2018-07-19 2024-05-14 Mediatek Singapore Pte. Ltd. Detecting foreign objects in wireless power transfer systems
JP2020137411A (ja) * 2019-02-19 2020-08-31 エルジー エレクトロニクス インコーポレイティド 無線電力伝送装置及びその制御方法
JP7129438B2 (ja) 2019-02-19 2022-09-01 エルジー エレクトロニクス インコーポレイティド 無線電力伝送装置及びその制御方法

Similar Documents

Publication Publication Date Title
WO2018004117A1 (fr) Procédé et dispositif de commande de puissance sans fil pour une charge sans fil
WO2017217663A1 (fr) Procédé de détection de corps étrangers, et appareil et système correspondants
WO2018105915A1 (fr) Procédé de détection d'objet étranger et son appareil
WO2018004120A1 (fr) Procédé de détection de corps étrangers, et appareil et système associés
WO2018038531A1 (fr) Procédé de détection de matériau étranger, et appareil et système correspondants
WO2018056633A1 (fr) Procédé de transmission d'énergie sans fil et dispositif associé
WO2019031748A1 (fr) Procédé de détection corps étranger destiné à une charge sans fil et dispositif associé
WO2016182208A1 (fr) Procédé de transfert d'énergie sans fil, procédé de réception d'énergie sans fil, et appareil correspondant
WO2018106072A1 (fr) Procédé de détection de substance étrangère pour charge sans fil et appareil associé
WO2018093099A1 (fr) Procédé de transfert d'énergie sans fil et appareil associé
WO2016024700A1 (fr) Système de transfert d'énergie sans fil et système de recharge sans fil
WO2015080539A1 (fr) Procédé, appareil et système de transfert de puissance sans fil
WO2017003117A1 (fr) Procédé de transmission d'énergie sans fil multimode et dispositif correspondant
WO2014200247A1 (fr) Procédé de transfer d'énergie sans fil, émetteur d'énergie sans fil et système de charge sans fil
WO2016006892A1 (fr) Procédé, appareil et système de transfert d'énergie sans fil
WO2017179874A1 (fr) Procédé de transfert d'énergie sans fil et dispositif de transfert d'énergie sans fil
WO2016080594A1 (fr) Dispositif d'émission de puissance sans fil, dispositif de réception de puissance sans fil, et système de charge sans fil
WO2015060570A1 (fr) Procédé, appareil et système de transfert d'énergie sans fil
WO2017018668A1 (fr) Procédé et appareil d'identification de récepteur d'énergie sans fil
EP3158622A1 (fr) Procédé, appareil et système de transfert d'énergie sans fil
WO2017217662A1 (fr) Procédé de détection d'objets étrangers, ainsi qu'appareil et système associés
WO2015119458A1 (fr) Procédé, appareil et système de transfert et de réception d'énergie sans fil
WO2019221532A1 (fr) Procédé et appareil de commande de transmission d'énergie sans fil
WO2018008841A1 (fr) Procédé et appareil de commande de puissance sans fil pour une charge sans fil
WO2019225806A1 (fr) Procédé et dispositif de transmission de puissance sans fil

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17843951

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2019511424

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2017843951

Country of ref document: EP

Effective date: 20190325