[go: up one dir, main page]

WO2019135612A1 - Chargeur sans fil et procédé de charge sans fil - Google Patents

Chargeur sans fil et procédé de charge sans fil Download PDF

Info

Publication number
WO2019135612A1
WO2019135612A1 PCT/KR2019/000075 KR2019000075W WO2019135612A1 WO 2019135612 A1 WO2019135612 A1 WO 2019135612A1 KR 2019000075 W KR2019000075 W KR 2019000075W WO 2019135612 A1 WO2019135612 A1 WO 2019135612A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
rail
analog
rail voltage
stabilization period
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2019/000075
Other languages
English (en)
Korean (ko)
Inventor
차대영
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Innotek Co Ltd
Original Assignee
LG Innotek Co Ltd
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
Application filed by LG Innotek Co Ltd filed Critical LG Innotek Co Ltd
Publication of WO2019135612A1 publication Critical patent/WO2019135612A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • 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
    • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Definitions

  • the present invention relates to a wireless power transmission technology, and more particularly, to a wireless charger and a wireless charging method that improve battery life by blocking unnecessary current consumption.
  • Portable terminals such as mobile phones and laptops, include a battery for storing power and a circuit for charging and discharging the battery. In order for the battery of such a terminal to be charged, power must be supplied from an external charger.
  • a charging system (hereinafter referred to as a "wireless charging system") and a control method using a method of transmitting power wirelessly are proposed.
  • the wireless charging system since the wireless charging system has not been installed in some portable terminals in the past and the consumer has to purchase a separate wireless charging receiver accessory, the demand for the wireless charging system is low, but the wireless charging user is rapidly increasing, Function is installed as a base.
  • a wireless charging system comprises a wireless power transmitter for supplying electric energy in a wireless power transmission mode and a wireless power receiver for receiving electric energy supplied from a wireless power transmitter to charge the battery.
  • Such a wireless charging system may transmit power by at least one wireless power transmission scheme (e.g., electromagnetic induction scheme, electromagnetic resonance scheme, RF wireless power transmission scheme, etc.).
  • a wireless power transmission scheme e.g., electromagnetic induction scheme, electromagnetic resonance scheme, RF wireless power transmission scheme, etc.
  • the wireless power transmission scheme may be based on a variety of wireless power transmission standards based on an electromagnetic induction scheme in which a magnetic field is generated in a power transmitter coil and charged using an electromagnetic induction principle in which electricity is induced in a receiver coil under the influence of its magnetic field .
  • the electromagnetic induction type wireless power transmission standard may include an electromagnetic induction wireless charging technique defined by a Wireless Power Consortium (WPC) and an Air Fuel Alliance (formerly PMA, Power Matters Alliance).
  • the wireless power transmission scheme may employ an electromagnetic resonance scheme in which the magnetic field generated by the transmission coil of the wireless power transmitter is tuned to a specific resonance frequency to transmit power to a nearby wireless power receiver .
  • the electromagnetic resonance method may include a resonance type wireless charging technique defined in the Air Fuel Alliance (formerly A4WP, Alliance for Wireless Power) standards organization, a wireless charging technology standard organization.
  • a wireless power transmission scheme may use an RF wireless power transmission scheme that transmits power to a wireless power receiver located at a remote location by applying low-power energy to the RF signal.
  • the above-described wireless charging technique is used to charge the mobile terminal during driving.
  • all operations are dependent on the battery, so the battery must be used in a very limited manner in comparison to the diesel / gasoline cars for wireless charging.
  • the conventional wireless charging device periodically transmits an analogue fingering signal for detecting that an object is placed on a transmitter. At this time, if the transmitter detects an object, it transmits a digital ping to identify it as a wireless power receiver. When it is determined that the wireless power receiver is receiving power, the power is transmitted to the wireless power receiver for charging.
  • the rail current is continuously supplied while the analog fingering signal is periodically generated, the constant current is consumed in the transmitter circuit even during the period in which the fingering signal is not generated, thereby reducing the life of the battery.
  • a wireless charger including: a transmission coil that receives an alternating current and generates a magnetic flux; an inverter that receives the direct current and generates the alternating current; And a controller for controlling the operation of the DC-DC converter and the inverter to generate a ping signal through the transmission coil, wherein the controller periodically generates a first ping signal, wherein the DC supply is maintained during a first stabilization period after the generation of the first finger signal, the DC is interrupted for a predetermined time after the first stabilization period, the current is supplied after the predetermined period of time, 2 < / RTI > stabilization period.
  • a wireless charging method including: periodically generating an analogue fingering signal for sensing an object; generating a digital fingering signal when the object is sensed; Wherein the step of interrupting the rail voltage between the analog finger signals comprises the steps of interrupting the rail voltage after a first stabilization period when the analog finger signal is off, And turning on the analog ping signal after the second stabilization period.
  • the first stabilization period may be longer than the second stabilization period.
  • the first stabilization period includes a time for sensing the object after the analog ping signal is turned off and the second stabilization period includes a time for raising the control voltage of the rail voltage and a voltage at which the rail voltage is able to generate the ping signal .
  • the step of breaking the rail voltage between the analogue zip signals may be operated at a period of two or more cycles of the analogue zip signals.
  • Blocking the rail voltage between the analogue zip signals may include 300ms to 350m.
  • the first stabilization period may include 30 ms to 32 ms, and the second stabilization period may include 5 ms to 7 ms.
  • the time for interrupting the rail voltage between the digital and analog signals may be less than the time for interrupting the rail voltage between the analogue signals.
  • a wireless charging method including periodically generating an analogue signal for sensing an object, generating a digital signal when the object is sensed, Interrupting a rail voltage between the digital and analog signals comprises interrupting a rail voltage after a first stabilization period when the digital signal is off; And a step of turning on the analog ping signal after the second stabilization period.
  • the first stabilization period may be shorter than the second stabilization period.
  • the first stabilization period may include a control time of the rail voltage
  • the second stabilization time may include a control time of the rail voltage and a time at which the rail voltage is raised to a voltage capable of generating a finger signal.
  • the embodiment has the effect of reducing the consumption current in the transmitter by blocking the rail voltage between the analogue zip signals.
  • the rail voltage is cut off every two or more cycles of the analog fingering signal, thereby reducing the consumed current and preventing the error due to the control operation and the control operation.
  • the embodiment has the effect of effectively reducing the consuming current in the transmitter by interrupting the rail voltage between the digital and analog ping signals.
  • FIG. 1 is a block diagram illustrating a wireless charging system according to an embodiment.
  • FIG. 2 is a state transition diagram for explaining a wireless power transmission procedure.
  • FIG. 3 is a block diagram illustrating a structure of a wireless power transmitter according to an exemplary embodiment of the present invention.
  • FIG. 4 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to FIG.
  • FIG. 5 is a block diagram illustrating a wireless charging method according to the first embodiment.
  • FIG. 6 is a graph showing voltage and current waveforms generated during the operation of the analog and digital signals.
  • FIG. 7 is a graph showing a partial area of FIG.
  • FIG. 8 is a diagram illustrating a structure of a wireless power transmitter according to the first embodiment.
  • FIG. 9 is a graph showing current and current waveforms according to the wireless charging method according to the second embodiment.
  • FIG. 10 is a block diagram illustrating a wireless charging method according to the third embodiment.
  • 11 is a graph showing voltage and current waveforms generated during operation of the analog and digital signals.
  • FIG. 12 is a graph showing a partial area of FIG.
  • the present invention is not necessarily limited to the above embodiments, as long as all of the constituent elements of the embodiment are described as being combined or combined in one operation. That is, within the scope of the object of the embodiment, all of the elements may be selectively coupled to one or more of them.
  • all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware.
  • the codes and code segments constituting the computer program may be easily deduced by those skilled in the art.
  • Such a computer program may be stored in a computer-readable storage medium, readable and executed by a computer, thereby realizing embodiments.
  • a magnetic recording medium, an optical recording medium, a carrier wave medium, or the like may be included.
  • first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements.
  • an apparatus for transmitting wireless power on a wireless power charging system includes a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a transmitter, a transmitter, a transmitter, a transmitter, , A wireless power transmitter, and a wireless charging device.
  • a wireless power receiving device, a wireless power receiving device, a wireless power receiving device, a wireless power receiving device, a receiving terminal, a receiving side, a receiving device, a receiver Terminals and the like can be used in combination.
  • the wireless charging device may be configured as a pad type, a cradle type, an access point (AP) type, a small base type, a stand type, a ceiling embedded type, a wall type, Power may be transmitted to the device.
  • AP access point
  • a wireless power transmitter can be used not only on a desk or on a table, but also developed for automobiles and used in a vehicle.
  • a wireless power transmitter installed in a vehicle can be provided in a form of a stand that can be easily and stably fixed and mounted.
  • a wireless power receiver according to another embodiment may also be mounted on a vehicle, an unmanned aerial vehicle, an air drone or the like.
  • a wireless power receiver may include at least one wireless power transmission scheme and may receive wireless power from two or more wireless power transmitters at the same time.
  • the wireless power transmission scheme may include at least one of the electromagnetic induction scheme, the electromagnetic resonance scheme, and the RF wireless power transmission scheme.
  • a wireless power transmitter and a wireless power receiver that constitute a wireless power system can exchange control signals or information through in-band communication or Bluetooth low energy (BLE) communication.
  • the in-band communication and the BLE communication can be performed by a pulse width modulation method, a frequency modulation method, a phase modulation method, an amplitude modulation method, an amplitude and phase modulation method, and the like.
  • the wireless power receiver can transmit various control signals and information to the wireless power transmitter by generating a feedback signal by switching on / off the current induced through the reception coil in a predetermined pattern.
  • the information transmitted by the wireless power receiver may include various status information including received power intensity information.
  • the wireless power transmitter can calculate the charging efficiency or the power transmission efficiency based on the received power intensity information.
  • FIG. 1 is a block diagram for explaining a wireless charging system according to an embodiment.
  • a wireless charging system (wireless charger) mainly includes a wireless power transmission terminal 10 for wirelessly transmitting power, a wireless power receiving terminal 20 for receiving the transmitted power, (30).
  • the wireless power transmitting terminal 10 and the wireless power receiving terminal 20 can perform in-band communication in which information is exchanged using the same frequency band as that used for wireless power transmission.
  • the wireless power transmitting terminal 10 and the wireless power receiving terminal 20 perform out-of-band communication in which information is exchanged using a different frequency band different from the operating frequency used for wireless power transmission .
  • information exchanged between the wireless power transmitting terminal 10 and the wireless power receiving terminal 20 may include control information as well as status information of each other.
  • the status information and the control information exchanged between the transmitting and receiving end will become more apparent through the description of the embodiments to be described later.
  • the in-band communication and the out-of-band communication may provide bidirectional communication, but the present invention is not limited thereto. In another embodiment, the in-band communication and the out-of-band communication may be provided.
  • the unidirectional communication may be that the wireless power receiving terminal 20 transmits information only to the wireless power transmitting terminal 10, but the present invention is not limited thereto, and the wireless power transmitting terminal 10 may transmit information Lt; / RTI >
  • bidirectional communication is possible between the wireless power receiving terminal 20 and the wireless power transmitting terminal 10, but information can be transmitted only by any one device at any time.
  • the wireless power receiving terminal 20 may acquire various status information of the electronic device 30.
  • the status information of the electronic device 30 may include current power usage information, information for identifying a running application, CPU usage information, battery charge status information, battery output voltage / current information, And is information obtainable from the electronic device 30 and available for wireless power control.
  • FIG. 2 is a state transition diagram for explaining a wireless power transmission procedure.
  • power transmission from a transmitter to a receiver according to a wireless power transmission procedure is largely divided into a selection phase 210, a ping phase 220, an Identification and Configuration Phase 230 A Negotiation Phase 240, a Calibration Phase 250, a Power Transfer Phase 260, and a Renegotiation Phase 270.
  • a selection phase 210 a ping phase 220
  • an Identification and Configuration Phase 230 A negotiation Phase 240
  • a Calibration Phase 250 a Power Transfer Phase 260
  • Renegotiation Phase 270 Renegotiation Phase
  • the selection step 210 includes the steps of transitioning, e.g., S202, S204, S208, S210, S212, when a specific error or a specific event is detected while initiating a power transmission or maintaining a power transmission .
  • the specific error and the specific event will become clear through the following description.
  • the transmitter may monitor whether an object is present on the interface surface. If the transmitter detects that an object is placed on the interface surface, it can transition to the ping step 220. [ In the selection step 210, the transmitter transmits an analog ping signal of a very short pulse and, based on the current change of the transmission coil or the primary coil, It is possible to detect whether or not there is an error.
  • the wireless power transmitter may measure the quality factor of one end and / or the other end of the wireless power resonant circuit, e.g., the transmit coil and / or the resonant capacitor for wireless power transmission .
  • a wireless power transmitter may measure the peak frequency of a wireless power resonant circuit (e.g., a power transfer coil and / or a resonant capacitor).
  • a wireless power resonant circuit e.g., a power transfer coil and / or a resonant capacitor.
  • the quality factor and / or peak frequency may be used in future negotiation step 240 to determine whether a foreign object is present.
  • step 220 the transmitter wakes up the receiver and transmits a digital ping to identify whether the sensed object is a wireless power receiver (S201). If the transmitter does not receive a response signal to the digital ping (e. G., A signal strength packet) from the receiver in step 220, then the transmitter may transition back to step 210 again. Also, in step 220, the transmitter may transition to a selection step 210 when receiving a signal indicating completion of power transmission from the receiver, i.e., a charging completion packet (S202).
  • a response signal to the digital ping e. G., A signal strength packet
  • the transmitter may transition to an identification and configuration step 230 for identifying the receiver and collecting receiver configuration and status information (S203).
  • the transmitter determines whether a packet is received or unexpected, a desired packet is not received for a predefined period of time (time out), a packet transmission error (transmission error) (No power transfer contract), the process can be shifted to the selection step 210 (S204).
  • the transmitter may determine whether an entry to the negotiation step 240 is required based on the negotiation field value of the configuration packet received in the identification and configuration step 230.
  • the sender can enter the negotiation step 240 (S205).
  • the transmitter may perform a predetermined foreign matter detection procedure.
  • the transmitter may directly enter the power transmission step 260 (S206).
  • the sender may receive a Foreign Object Detection (FOD) status packet including a reference quality factor value. Or a FOD state packet including a reference peak frequency value. Or receive a status packet including a reference quality factor value and a reference peak frequency value.
  • FOD Foreign Object Detection
  • the transmitter can determine a critical quality factor value for FO detection based on the reference quality factor value.
  • the transmitter can determine the critical peak frequency value for FO detection based on the reference peak frequency value.
  • the transmitter can detect whether there is an FO in the fill area using the threshold quality factor value for the determined FO detection and the currently measured quality factor value - for example, the quality factor value measured before the ping step,
  • the power transmission can be controlled according to the FO detection result. As an example, if FO is detected, power transmission may be interrupted, but is not limited to this.
  • the transmitter can detect whether there is a FO in the fill area using the threshold peak frequency value for the determined FO detection and the currently measured peak frequency value - e.g., the peak frequency value measured before the ping step,
  • the power transmission can be controlled according to the FO detection result. As an example, if FO is detected, power transmission may be interrupted, but is not limited to this.
  • the transmitter may return to the selection step 210 (S208). On the other hand, if no FO is detected, the transmitter may enter the power transfer step 260 via the correction step 250 (S207 and S209).
  • the transmitter receives the strength of the power received at the receiving end in the correction step 250 and compares the received power with the transmitted power at the transmitting end to measure the power loss at the receiving end and the transmitting end can do. That is, the transmitter can predict the power loss based on the difference between the transmission power of the transmitter and the reception power of the receiver in the correction step 250.
  • a transmitter according to an embodiment may compensate the power loss threshold for FOD detection by reflecting the predicted power loss. That is, since the FO is absent in the correction step, the coupling state of the receiver and the power loss due to the friendly metal component of the receiver are determined, and when an additional power loss other than the predetermined power loss occurs, .
  • the sender may receive an unexpected packet, a desired packet is not received for a predefined time (time out), a violation of a predetermined power transmission contract occurs transfer contract violation, and if the charging is completed, the process may proceed to the selection step 210 (S210).
  • the transmitter may transition to the renegotiation step 270 (S211). At this time, if the renegotiation is normally completed, the transmitter may return to the power transmission step 260 (S213).
  • the power transmission contract may be set based on the status and characteristic information of the transmitter and the receiver.
  • the transmitter status information may include information on the maximum amount of transmittable power, information on the maximum number of receivable receivers, and the receiver status information may include information on the requested power and the like.
  • the transmitter stops power transmission to the receiver and may transition to the selection step 210 (S212).
  • FIG. 3 is a block diagram illustrating a structure of a wireless power transmitter according to an exemplary embodiment of the present invention.
  • the wireless power transmitter 300 includes a power unit 360, a DC-DC converter 310, an inverter 320, a resonant circuit 330, a sensing unit 350, A communication unit 340, an alarm unit 370, and a control unit 380.
  • the resonance circuit 330 includes a resonance capacitor 331 and an inductor (or transmission coil) 332.
  • the communication section 340 includes at least one of a demodulation section 341 and a modulation section 342, .
  • the transmitting coil can generate a magnetic flux from the applied AC power.
  • the power supply unit 360 may receive DC power from an external power supply terminal or a battery and transmit the DC power to the DC-DC converter 310.
  • the power supply unit 360 may be a vehicle battery included in the vehicle.
  • the vehicle may include, but is not limited to, an internal combustion engine, an electric vehicle, and a hybrid vehicle.
  • the battery may be configured to be mounted and chargeable within the wireless power transmitter 300, but this is merely an example and may be implemented in a wireless power transmitter 300 in the form of a secondary battery or an external battery.
  • the power supply unit 360 may be connected through a predetermined cable.
  • the DC-DC converter 310 may convert the DC power input from the power supply unit 360 into DC power having a specific intensity under the control of the controller 380.
  • the DC-DC converter 310 may be configured as a variable voltage generator capable of controlling the intensity of a voltage, but is not limited thereto.
  • the inverter 320 can convert the converted DC power into AC power.
  • the inverter 320 may convert a DC power signal input through a plurality of switch controls into an AC power signal and output the AC power signal.
  • the inverter 320 may include a full bridge circuit, but the present invention is not limited thereto and may include a half bridge.
  • the inverter 320 may be configured to include both a half bridge circuit and a full bridge circuit.
  • the controller 380 may control whether the inverter 320 operates as a half bridge or a full bridge, As shown in FIG.
  • the wireless power transmitter may adaptively control the bridge mode of the inverter 320 according to the strength of the power required by the wireless power receiver.
  • the bridge mode includes a half bridge mode and a full bridge mode.
  • the control unit 380 may control the inverter 320 to operate in the half bridge mode.
  • the controller 380 can control to operate in the full bridge mode.
  • the wireless power transmitter may adaptively determine the bridge mode according to the sensed temperature and drive the inverter 320 according to the determined bridge mode.
  • the controller 380 may disable the half-bridge mode and control the full-bridge mode to be activated. That is, the wireless power transmission apparatus increases the voltage through the full bridge circuit and decreases the intensity of the current flowing through the resonance circuit 330 for power transmission of the same intensity, thereby reducing the internal temperature of the wireless power transmission apparatus to a predetermined reference value or less .
  • the amount of heat generated in the electronic component mounted on the electronic device may be more sensitive to the intensity of the current than the voltage applied to the electronic component.
  • inverter 320 may convert DC power to AC power as well as change the strength of AC power.
  • the inverter 320 may adjust the frequency of a reference alternating current signal used to generate alternating-current power under the control of the controller 380 to control the intensity of the alternating-current power.
  • the inverter 320 may comprise a frequency oscillator that generates a reference AC signal having a particular frequency, but this is only one embodiment, and another example is that the frequency oscillator is separate from the inverter 320 And may be mounted on one side of the wireless power transmitter 300.
  • the wireless power transmitter 300 may further include a gate driver (not shown) for controlling a switch provided in the inverter 320.
  • the gate driver can receive at least one pulse width modulated signal from the control unit 380 and control the switch of the inverter 320 according to the received pulse width modulated signal.
  • the controller 880 can control the intensity of the output power of the inverter 320 by controlling the duty cycle of the pulse width modulation signal, that is, the duty ratio - and the phase.
  • the control unit 360 may adaptively control the duty cycle and phase of the pulse width modulation signal based on the feedback signal received from the wireless power receiving apparatus.
  • the sensing unit 350 may measure the voltage / current of the DC-converted power and provide the measured voltage / current to the controller 380. Also, the sensing unit 350 may measure the internal temperature of the wireless power transmitter 300 or the inside of the charging interface (surface) to determine whether overheating occurs, and provide the measurement result to the controller 380. For example, the controller 380 may block the power supply from the power supply unit 380 adaptively based on the voltage / current value or the internal temperature value measured by the sensing unit 350. To this end, a power cut-off circuit may be further provided at one side of the DC-DC converter 310 to cut off power supplied from the power supply 360.
  • the control unit 380 can receive the power reception status information and / or the power control signal of the wireless power receiver through the communication unit 340 and can control the amplification rate based on the received power reception status information and / or the power control signal Can be adjusted dynamically.
  • the power reception status information may include, but is not limited to, the intensity information of the rectifier output voltage, the intensity information of the current applied to the reception coil, and the like.
  • the power control signal may include a signal for requesting power increase, a signal for requesting power reduction, and the like.
  • the controller 380 can control to generate the analog ping signal and the digital ping signal.
  • the control unit 380 can control the supply of the rail voltage between the digital finger signal and the analog signal between the analog finger signals.
  • the modulator 342 may modulate the control signal generated by the controller 380 and transmit the modulated control signal to the resonance coil 330.
  • the modulation scheme for modulating the control signal includes a frequency shift keying (FSK) modulation scheme, a Manchester coding modulation scheme, a phase shift keying (PSK) modulation scheme, a pulse width modulation scheme, A differential bi-phase modulation method, and the like.
  • the demodulator 341 can demodulate the detected signal and transmit the demodulated signal to the controller 380 when a signal received through the transmission coil is detected.
  • the demodulated signal may include a signal strength indicator, an error correction (EC) indicator for power control during wireless power transmission, an end of charge indicator (EOC), and an overvoltage / overcurrent /
  • EOC end of charge indicator
  • the present invention is not limited thereto, and various status information for identifying the status of the wireless power receiver may be included.
  • the demodulated signal may include FOD state information including a value of at least one of a reference quality factor value and a reference frequency value.
  • the wireless power transmitter 300 may obtain the signal strength indicator via in-band communication that uses the same frequency used for wireless power transmission to communicate with the wireless power receiver.
  • the wireless power transmitter 300 and the wireless power receiver perform in-band communication.
  • the wireless power transmitter 300 is only one embodiment, Directional communication through different frequency bands.
  • the near-end bi-directional communication may be any one of low-power Bluetooth communication, RFID communication, UWB communication, and Zigbee communication.
  • FIG. 4 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to FIG.
  • the wireless power receiver 400 includes a receiving coil 410, a rectifier 420, a DC / DC converter 430, a load 440, a sensing unit 450, 460, and a main control unit 470.
  • the communication unit 460 may include at least one of a demodulation unit 461 and a modulation unit 462.
  • the wireless power receiver 400 shown in the example of FIG. 4 is shown as being capable of exchanging information with a wireless power transmitter through in-band communication, this is only one embodiment, and in another embodiment
  • the communication unit 460 may provide short-range bidirectional communication through a frequency band different from the frequency band used for wireless power signal transmission.
  • the AC power received through the receiving coil 410 may be transmitted to the rectifying unit 420.
  • the rectifier 420 may convert the AC power to DC power and transmit it to the DC / DC converter 430.
  • the DC / DC converter 430 may convert the intensity of the rectifier output DC power to a specific intensity required by the load 440 and then forward it to the load 440.
  • the receiving coil 410 may also include a plurality of receiving coils (not shown), i.e., first to n-th receiving coils.
  • the frequency of the AC power transmitted to each of the reception coils may be different from each other, and another embodiment may include a predetermined frequency controller having a function of adjusting LC resonance characteristics for different reception coils
  • the resonance frequencies of the respective reception coils can be set differently.
  • the sensing unit 450 may measure the intensity of the DC power output from the rectifier 420 and may provide the measured DC power to the main control unit 470.
  • the sensing unit 450 may measure the intensity of the current applied to the reception coil 410 according to the wireless power reception, and may transmit the measurement result to the main control unit 470.
  • the sensing unit 450 may measure the internal temperature of the wireless power receiver 400 and provide the measured temperature value to the main control unit 470.
  • the main control unit 470 may compare the measured rectifier output DC power with a predetermined reference value to determine whether an overvoltage is generated. As a result of the determination, if an overvoltage is generated, a predetermined packet indicating that an overvoltage has occurred can be generated and transmitted to the modulator 462.
  • the signal modulated by the modulator 462 may be transmitted to the wireless power transmitter through the receiving coil 410 or a separate coil (not shown).
  • the main control unit 470 can determine that the detection signal has been received when the intensity of the rectifier output DC power is equal to or greater than a predetermined reference value and when the signal strength indicator corresponding to the detection signal is received by the modulation unit 462 To be transmitted to the wireless power transmitter.
  • the demodulation unit 461 demodulates the AC power signal between the reception coil 410 and the rectifier 420 or the DC power signal output from the rectifier 420 to identify whether or not the detection signal is received, (470). ≪ / RTI > At this time, the main control unit 470 may control the signal intensity indicator corresponding to the detection signal to be transmitted through the modulation unit 462.
  • the main control unit 470 may control the FOD state packet including at least one of the previously stored reference quality factor and the reference frequency value to be transmitted to the wireless power transmitter through the modulator 462.
  • FIG. 5 is a block diagram showing a wireless charging method according to the first embodiment
  • FIG. 6 is a graph showing voltage and current waveforms generated during operation of an analog and digital signals
  • FIG. 8 is a diagram illustrating a structure of a wireless power transmitter according to the first embodiment.
  • the wireless charging method according to the first embodiment may include a step S301 of cutting off the rail current after the analog fingering signal is turned off.
  • the wireless power transmitter 300 may periodically generate analog and digital digital signals.
  • the analog fingering signal may be generated in a period of 400 ms to 420 ms.
  • the digital ping may be generated in the Bms period, or may be generated in Xma when an object is detected by the analog ping signal.
  • power (or rail current) input to the inverter 320 in the idle period between the periodically generated analog ping and / or digital ping signal may be blocked.
  • the idle period may correspond to an interval in which the inverter 320 outputs no AC voltage / current.
  • the input power (or the rail current) of the inverter 320 may be cut off in consideration of the warm-up period for generating the voltage for the inverter 320 to operate normally. For example, power (or current) is applied to the inverter 320 before the generation of the ping signal, so that no problem occurs in outputting the next ping signal.
  • the output voltage of the inverter 320 can be maintained at a predetermined time (for example, Zma). And may be a time for the control unit 380 to determine whether the object is in the active area (charge interface) using the analog ping signal.
  • the analog ping signal P1 serves to sense an object.
  • the analog ping signal P1 can be transmitted in a very short pulse.
  • the analog ping signal P1 may be generated at predetermined intervals.
  • the analog ping signal P1 may be generated in a period of 400 ms to 420 ms, but is not limited thereto.
  • the digital ping signal P2 activates the receiver when an object is sensed and serves to identify whether the sensed object is a wireless power receiver. If it is determined that the sensed object is not a wireless power receiver, the analog ping signal P1 may be periodically transmitted again.
  • the digital ping signal P2 may be generated according to the number of coils.
  • the digital ping signal P2 may be generated as three signals corresponding to the number of coils, but is not limited thereto.
  • the structure of this embodiment can be applied to a coil charger having one coil.
  • the rail current I_rail can be cut off between the analog finger signals P1 to prevent unnecessary standby current consumption.
  • the rail current I_rail can be controlled by controlling the rail voltage V_rail. For example, when the analog ping signal P1 is off, the controller 380 can control the rail voltage V_rail to be lowered to 0V.
  • the interval T1 in which the rail current I_rail is blocked may include 300 ms to 350 ms.
  • the digital ping signal P2 may be generated to identify if the object sensed by the transmitter is a wireless power receiver. Therefore, it is necessary to consider the time T4 at which the digital ping signal P2 can be generated after the analog ping signal P1 is turned off. For example, if the rail current I_rail is cut off before the object determination time, a digital ping signal P2 may not be generated even though an object exists in the receiver.
  • the rail current I_rail can be cut off after a certain period of time after the analog ping signal P1 is turned off in consideration of the time T4 at which the digital ping P1 signal can be generated.
  • the interval between the time when the analog ping signal P1 is turned off and the time when the rail current I_rail starts to be cut off can be referred to as a first stabilization period T2.
  • the time for interrupting the rail current I_rail after a predetermined time after the analog ping signal P1 is turned off is longer than the time T4 at which the digital ping P1 signal can be generated after the analog ping signal P1 is turned off It can be big.
  • the first stabilization period T2 may include, but is not limited to, about 30 ms to 32 ms. Since the time T4 at which the digital ping signal P2 can be generated after the analog ping signal P1 is turned off may be 29 ms, the first stabilization period T2 is set to the digital A generation time (T4) of the ping signal (P2), and a margin period of about 3 ms. The margin period may be in the range of 10% of the digital finger signal generation time T4 after the analog finger signal is turned off.
  • the DC-DC converter 310 may further include a switch SW capable of receiving an enable / enable signal.
  • the control unit 380 controls the switch SW so as to control supply and interruption of the rail voltage V_rail input to the inverter 320.
  • the switch SW may be disposed inside the DC-DC converter 310.
  • the control unit 380 can provide a signal to turn off the switch SW after a predetermined time, for example, 30 ms to 32 ms, which is the first stabilization time, when the analog ping signal P1 is turned off.
  • a predetermined time for example, 30 ms to 32 ms, which is the first stabilization time
  • the switch SW is turned off, the rail voltage V_rail is lowered to 0 V so that the rail current I_rail can be cut off.
  • the rail voltage V_rail is lowered to OV by the control unit 380, the rail voltage V_rail gradually decreases because a predetermined voltage remains in the internal components of the DC-DC converter 310.
  • the wireless charging method may perform the step of supplying the rail current after a predetermined time after completing the step of cutting off the rail current after the analogue finger signal is turned off.
  • the step S302 of supplying the rail current may perform the step S302 of raising the rail voltage V_rail to, for example, 6 V to supply the rail current.
  • the rail current I_rail may be supplied after 300 ms to 350 ms after the rail current I_rail is cut off.
  • step S303 of generating an analog ping signal after the second stabilization period may be performed.
  • the analog ping signal P1 must rise to a current value such that the rail current I_rail value can produce the analog ping signal P1.
  • a period in which the rail current I_rail is raised to a voltage capable of generating the analog ping signal P1 may be referred to as a second stabilization period T3.
  • the second stabilization period may further include a time for controlling the voltage supplied by the controller 380.
  • the second stabilization period T3 may include 5 ms to 7 ms. Therefore, the second stabilization period T3 can have a sufficient time to control the current supply.
  • the control unit 380 may provide a signal to turn on the switch SW. This causes the rail voltage V_rail to rise from 0V to 6V. At this time, the rail current I_rail is also increased.
  • the control unit 380 can provide a signal to generate the analog ping signal P1 when the current value rises to such a value as to generate the analog ping signal P1.
  • the rail current is continuously supplied between the analog finger signals even though the analog finger signal is periodically generated. This caused unnecessary quiescent current in the circuit.
  • the wireless charging method according to the embodiment has an effect of reducing the consumed current by 10% or more as compared with the conventional wireless charging method.
  • the rail current is controlled to be interposed between the analog input signals.
  • unnecessary consumption current between the analogue zip signals is reduced.
  • the generation period between the analog pings is short, repetitive control operations for the analog ping are increased, so that degradation of the device performance and control error may occur. Therefore, an operation for minimizing control operation while reducing unnecessary current consumption between analogue finger signals will be described below.
  • FIG. 9 is a graph showing current and current waveforms according to the wireless charging method according to the second embodiment.
  • the method of wireless charging according to the second embodiment includes the steps of interrupting the rail current after a first stabilization time after the analogue finger signal is turned off, supplying the rail current after the predetermined time, Generating a signal, and the step of breaking the rail current between the analogue zip signals may be operated in two cycles.
  • the analog ping signal P1 serves to sense an object.
  • the analog ping signal P1 can be transmitted in a very short pulse.
  • the analog ping signal P1 may be generated at predetermined intervals.
  • the analog ping signal P1 may be generated at a cycle of 400 ms to 420 ms, but is not limited thereto.
  • the digital ping signal P2 activates the receiver when an object is sensed and serves to identify whether the sensed object is a wireless power receiver.
  • the digital ping signal P2 may be generated according to the number of coils.
  • the digital ping signal P2 may be generated as three signals corresponding to the number of coils, but is not limited thereto. If it is determined that the sensed object is not a wireless power receiver, the analog ping signal P1 may be periodically transmitted again.
  • the first stabilization period T2 can be set.
  • the first stabilization period T2 may include a period after the analog ping signal P1 is turned off and a period where the rail current I_rail starts to be blocked.
  • the first stabilization period T2 may include, but is not limited to, about 30 ms to 32 ms.
  • the time T4 at which the digital ping P1 signal can be generated after the analog ping signal P1 is turned off may be 29 ms but the object may be detected by the signal delay or noise after the generation of the analog ping signal P1 It can take more time.
  • the first stabilization period T2 may include a margin period ranging from 10% of the time during which the digital ping signal P2 can be generated after the analog ping signal P1 is turned off.
  • the margin period may be about 3 ms, but is not limited thereto.
  • the second stabilization period T3 may include a period in which the rail current I_rail rises to a voltage capable of generating the analog ping signal P1.
  • the second stabilization period T3 may further include a time for controlling the current supply by the control unit 380.
  • the second stabilization period T3 may include 5 ms to 7 ms.
  • the second stabilization period may take more time to detect an object due to a signal delay or noise. In this case, by further including the margin section, it is possible to secure a sufficient time for detecting the object.
  • the margin period may include 1 ms to 2 ms.
  • the rail current I_rail can be cut off after the first stabilization period T2. Thereafter, the rail current I_rail can be supplied after a predetermined time.
  • the rail current I_rail may be supplied before the second stabilization period T3 before the second analogue ping signal P12 is generated.
  • a control operation for interrupting the rail current I_rail may not be performed between the second analog ping signal P12 and the third analog ping signal P13.
  • a standby current may be generated between the second analogue ping signal P12 and the third analogue ping signal P13.
  • the rail current I_rail can be cut off after the first stabilization period T2. Thereafter, the rail current I_rail can be supplied after a predetermined time.
  • the rail current V_rail can be supplied before the second stabilization period T3 before the fourth analogue ping signal P14 is generated.
  • the rail current I_rail can be controlled by controlling the rail voltage V_rail.
  • the control unit 380 can turn on the switch SW to supply the rail voltage.
  • the control unit 380 can turn off the switch SW to lower the rail voltage V_rail to 0V.
  • the step of interrupting the rail current between the analog finger signals is configured to operate in units of two periods, thereby reducing the control operation and the operation error.
  • control it is also possible to control to operate more than two periods between analogue zing signals.
  • the current consumption in the circuit is reduced by interrupting the rail current between the analogue finger signals.
  • the operation of reducing the current consumption generated between the analogue and digital digital signals will be described.
  • FIG. 10 is a block diagram showing a wireless charging method according to the third embodiment
  • FIG. 11 is a graph showing voltage and current waveforms generated during operation of the analog and digital signals
  • the wireless charging method according to the second embodiment may include a step S401 of cutting off a rail voltage after a first stabilization time after a digital finger signal is turned off.
  • the analog ping signal P1 serves to sense an object.
  • the analog ping signal P1 can be transmitted in a very short pulse.
  • the analog ping signal P1 may be generated at predetermined intervals.
  • the analog ping signal P1 may be generated in a period of 400 ms to 420 ms, but is not limited thereto.
  • the digital ping signal P2 activates the receiver when an object is sensed and serves to identify whether the sensed object is a wireless power receiver.
  • the digital ping signal P2 may be generated according to the number of coils.
  • the digital ping signal P2 may be generated as three signals corresponding to the number of coils, but is not limited thereto. If it is determined that the sensed object is not a wireless power receiver, the analog ping signal P1 may be periodically transmitted again.
  • the rail current I_rail can be interposed between the digital and analog ping signals P2 and P1.
  • the rail current I_rail can be controlled by controlling the rail voltage V_rail. For example, when the digital ping signal P2 is turned off, the rail voltage V_rail is lowered to 0 V to shut off the rail current I_rail and the rail voltage V_rail is raised before the next analog ping signal P1 is generated, The current I_rail can be supplied.
  • the rail current I_rail between the digital fingering signal P2 and the analog finging signal P1 because the section between the digital fingers P2 and P1 is shorter than the interval between the analog fingers P1, May be shorter than the time to block the rail current between the analog finger signals P1.
  • a first stabilization period T22 may be provided between the periods in which the rail current I_rail is blocked after the digital ping signal P2 is turned off.
  • the first stabilization period T22 may include a time at which the control unit provides an OFF signal to the switch to control the rail voltage V_rail. In the first stabilization period T22, the rail current I_rail is still generated .
  • the wireless charging method according to the second embodiment performs step S402 of supplying a rail current after a predetermined time after the step S401 of cutting off the rail voltage after the digital fingering signal is turned off can do.
  • the step of supplying the rail current S401 may perform the step S302 of raising the rail voltage V_rail to, for example, 6 V to supply the rail current.
  • the rail current I_rail rises to a current value enough to generate the analog ping signal P1 during the raising of the rail voltage V_rail.
  • a period in which the rail current I_rail is raised to a voltage capable of generating the analog ping signal P1 may be referred to as a second stabilization period T33.
  • step S403 may be performed to generate an analog ping signal after the second stabilization period.
  • the step of generating the analogue zip signal may be generated after the second stabilization period T33 described above.
  • the embodiment provides a method of interrupting the rail current between the digital and analogue zip signals together with a method of interrupting the rail current between analogue zip signals, thereby reducing the quiescent current generated between the digital and analogue zip signals So that the current unnecessarily consumed can be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Selon un mode de réalisation, l'invention porte sur un chargeur sans fil qui comprend : une bobine d'émission pour générer un flux magnétique par réception d'un courant alternatif; un onduleur pour générer le courant alternatif par réception d'un courant continu; un convertisseur continu-continu pour fournir le courant continu à l'onduleur; et un dispositif de commande pour générer un signal ping au moyen de la bobine d'émission par commande des opérations du convertisseur continu-continu et de l'onduleur, le dispositif de commande pouvant être configuré pour générer périodiquement un premier signal ping, maintenir l'alimentation en courant continu pendant une première section de stabilisation à partir de la génération du premier signal ping, bloquer le courant continu pendant un temps prédéterminé après la première section de stabilisation, fournir le courant après le temps prédéterminé, et générer un second signal ping après une seconde section de stabilisation à partir du temps prédéterminé.
PCT/KR2019/000075 2018-01-04 2019-01-03 Chargeur sans fil et procédé de charge sans fil Ceased WO2019135612A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180001106A KR20190083454A (ko) 2018-01-04 2018-01-04 무선 충전기 및 무선 충전 방법
KR10-2018-0001106 2018-01-04

Publications (1)

Publication Number Publication Date
WO2019135612A1 true WO2019135612A1 (fr) 2019-07-11

Family

ID=67144175

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2019/000075 Ceased WO2019135612A1 (fr) 2018-01-04 2019-01-03 Chargeur sans fil et procédé de charge sans fil

Country Status (2)

Country Link
KR (1) KR20190083454A (fr)
WO (1) WO2019135612A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111740512A (zh) * 2020-08-21 2020-10-02 广东希荻微电子有限公司 一种无线充电发射端系统以及控制方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102810012B1 (ko) 2020-03-25 2025-05-20 삼성전자 주식회사 무선 충전 장치 및 방법
WO2024147664A1 (fr) * 2023-01-04 2024-07-11 주식회사 비에이치이브이에스 Procédé de comptabilisation de pertes de puissance
WO2025048421A1 (fr) * 2023-08-25 2025-03-06 주식회사 비에이치이브이에스 Procédé de comptabilité de perte de puissance

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150020710A (ko) * 2009-01-22 2015-02-26 퀄컴 인코포레이티드 무선 충전을 위한 적응 전력 제어
KR20160051501A (ko) * 2014-11-03 2016-05-11 주식회사 한림포스텍 무선 전력 전송 및 충전 시스템
WO2017023140A1 (fr) * 2015-08-06 2017-02-09 삼성전자주식회사 Dispositif et procédé pour gérer une puissance dans un dispositif électronique
KR20170135492A (ko) * 2016-05-31 2017-12-08 엘지이노텍 주식회사 무선 전력 송신 방법 및 그를 위한 장치
WO2017217663A1 (fr) * 2016-06-13 2017-12-21 엘지이노텍(주) Procédé de détection de corps étrangers, et appareil et système correspondants

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150020710A (ko) * 2009-01-22 2015-02-26 퀄컴 인코포레이티드 무선 충전을 위한 적응 전력 제어
KR20160051501A (ko) * 2014-11-03 2016-05-11 주식회사 한림포스텍 무선 전력 전송 및 충전 시스템
WO2017023140A1 (fr) * 2015-08-06 2017-02-09 삼성전자주식회사 Dispositif et procédé pour gérer une puissance dans un dispositif électronique
KR20170135492A (ko) * 2016-05-31 2017-12-08 엘지이노텍 주식회사 무선 전력 송신 방법 및 그를 위한 장치
WO2017217663A1 (fr) * 2016-06-13 2017-12-21 엘지이노텍(주) Procédé de détection de corps étrangers, et appareil et système correspondants

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111740512A (zh) * 2020-08-21 2020-10-02 广东希荻微电子有限公司 一种无线充电发射端系统以及控制方法
CN111740512B (zh) * 2020-08-21 2021-01-15 广东希荻微电子有限公司 一种无线充电发射端系统以及控制方法

Also Published As

Publication number Publication date
KR20190083454A (ko) 2019-07-12

Similar Documents

Publication Publication Date Title
WO2019045350A2 (fr) Procédé et dispositif de transmission d'énergie sans fil
WO2017094997A1 (fr) Dispositif de charge sans fil, procédé de transmission d'énergie sans fil s'y rapportant, et support d'enregistrement pour le procédé
WO2018021665A1 (fr) Procédé et appareil de vérification d'emplacement pour récepteur d'énergie sans fil
WO2018194337A1 (fr) Appareil de transmission d'énergie sans fil pour charge sans fil
WO2014189307A1 (fr) Appareil et procédé de transmission d'énergie sans fil
WO2019004753A1 (fr) Dispositif et procédé de transmission de puissance sans fil à base de bobines multiples
WO2019022438A1 (fr) Dispositif bobine et dispositif de charge sans fil le comprenant
WO2019135612A1 (fr) Chargeur sans fil et procédé de charge sans fil
WO2017195977A2 (fr) Procédé de chargement sans fil, et appareil et système associés
WO2017065413A1 (fr) Procédé de charge sans fil à bobines multiples, ainsi que dispositif et système associés
WO2019143028A1 (fr) Bobine de charge sans fil à facteur de qualité élevé
WO2017065526A1 (fr) Système de transfert d'énergie sans fil et son procédé d'excitation
WO2017061716A1 (fr) Procédé et dispositif de guidage de l'alignement d'un dispositif de charge sans fil et système associé
WO2015102454A1 (fr) Appareil de transmission d'énergie sans fil et procédé de transmission d'énergie sans fil
WO2013162336A1 (fr) Appareil de réception de puissance sans fil et procédé de régulation de courant associé
WO2016133322A1 (fr) Dispositif de transmission d'énergie sans fil et procédé de transmission d'énergie sans fil
WO2018008841A1 (fr) Procédé et appareil de commande de puissance sans fil pour une charge sans fil
WO2017138713A1 (fr) Dispositif électrique sans fil ayant une pluralité de bobines d'émission et son procédé de pilotage
WO2019107748A1 (fr) Dispositif et système de charge sans fil
WO2020085630A1 (fr) Procédé et appareil de commande d'énergie sans fil
WO2021201413A1 (fr) Dispositif de transmission d'énergie sans fil et procédé de transmission d'énergie sans fil
WO2017078285A1 (fr) Émetteur d'énergie sans fil
WO2017138712A1 (fr) Procédé de charge sans fil et dispositif et système associés
WO2019027158A1 (fr) Émetteur d'énergie sans fil et procédé de commande pour émetteur d'énergie sans fil
WO2019135586A1 (fr) Procédé de détection d'un signal de communication en champ proche, et dispositif pour celui-ci

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: 19736114

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19736114

Country of ref document: EP

Kind code of ref document: A1