Method and system for non-contact charging using phased array

Abstract

Disclosed are a method and system for non-contact charging using a phased array. The system for non-contact charging using a phased array disclosed herein comprises: a transmission unit in which at least one horizontal wire and at least one vertical wire intersect in a cross shape, thus being arranged in an array, and which does not have a coil; at least one reception unit located on the transmission unit and including a coil for receiving changes in magnetic field due to the array position of the transmission unit; and a sensor unit for recognizing the array position of the transmission unit at which the reception unit is located.

Description

Phased array type contactless charging method and system

[0001] The present invention relates to a non-contact charging method and system using a phased array method.

[0002] Modern wireless power transmission has undergone extensive research and has advanced in various aspects compared to the past. To increase range, a four-coil system based on magnetic resonance [1] has been introduced, and research is also underway to increase the degrees of freedom [2]. Various other research projects are ongoing. Nevertheless, the technology still faces various challenges.

[0003] In wireless power transmission, installing circular coils in every possible location for free placement is highly impractical. To address this issue, this paper proposes a method for changing the location of the magnetic field reinforcement based on the current phase, without additional wiring, to suit the receiver.

[0004] The technical challenge of the present invention is to provide a non-contact charging method and system using a phased array approach, a novel unit for flexible deployment. By detecting the position of the receiver and setting the current phase using a straight wire instead of a circular coil, the system maintains maximum efficiency regardless of the receiver's position.

[0005] In one aspect, the phased array type contactless charging system proposed in the present invention comprises an array in which at least one horizontal wire and at least one vertical wire are arranged in a cross shape, a coil-less transmitter, at least one receiver including a coil positioned on the transmitter for receiving a change in a magnetic field according to an array position of the transmitter, and a sensor unit for recognizing an array position of the transmitter on which the receiver is positioned.

[0006] The above transmitter changes the phase of the current flowing in at least one horizontal wire and at least one vertical wire intersecting in the cross shape according to the position of the above receiver.

[0007] The above transmitter changes the magnetic flux density at the corresponding array location of the transmitter where the receiver is located according to the phase change of the current.

[0008] The above transmitter adjusts the magnetic flux density at a desired array location without additional conductors through constructive interference between at least one transverse wire and at least one vertical wire.

[0009] The above transmitter activates current to flow in overlapping wires of the adjacent arrays when two or more receivers are positioned on the transmitter, and when each of the two or more receivers is positioned on a different array of the transmitter, and the different arrays are adjacent to each other.

[0010] The above transmitter disables current from flowing through a wire located within the area of ​​the receiver when the area of ​​one of the receivers is larger than the area of ​​one array of the transmitters.

[0011] The sensor unit recognizes whether an object exists on the transmitter unit, and if an object exists on the transmitter unit, recognizes whether the object is a receiver unit including a coil.

[0012] When the above object is a receiver, the position of the array of the transmitter where the receiver is located is recognized, and the transmitter performs WPT (Wireless Power Transfer).

[0013] The sensor unit, when two or more receivers are positioned on the transmitter, recognizes the number of receivers and the position of each receiver, and causes the transmitter to perform WPT.

[0014] In another aspect, the non-contact charging method of the phased array type proposed in the present invention comprises a step of recognizing the presence of an object on a transmitter without a coil, a step of recognizing, when the object is present on the transmitter, whether the object is a receiver including a coil, a step of recognizing, when the object is a receiver, the step of recognizing, by the sensor, the number of receivers, and a step of recognizing, by the sensor, the array position of the transmitter where each of the receivers is located, so that the transmitter performs WPT (Wireless Power Transfer).

[0015] According to embodiments of the present invention, a non-contact charging method and system of a phased array type, which is a new unit for free arrangement, detects the position of a receiver using a straight conductor without using a circular coil, and sets the phase of the current, thereby maintaining the highest efficiency regardless of the position of the receiver.

[0016] FIG. 1 is a drawing showing the configuration of a non-contact charging system of a phased array type according to one embodiment of the present invention.

[0017] FIG. 2 is a flowchart for explaining a non-contact charging method using a phased array method according to one embodiment of the present invention.

[0018] FIG. 3 is a drawing for explaining a coil-less, cross-shaped transmitter according to one embodiment of the present invention.

[0019] FIG. 4 is a drawing for explaining a coil-less array-type transmitter according to one embodiment of the present invention.

[0020] FIG. 5 is a drawing for explaining one receiving unit positioned on a transmitting unit according to one embodiment of the present invention.

[0021] FIG. 6 is a drawing for explaining a plurality of receiving units positioned on a transmitting unit according to one embodiment of the present invention.

[0022] FIG. 7 is a graph showing the magnetic flux density that varies depending on the wire being activated for a plurality of receivers according to one embodiment of the present invention.

[0023] FIG. 8 is a drawing for explaining a large-area receiving unit located on a transmitting unit according to one embodiment of the present invention.

[0024] FIG. 9 is a graph showing the magnetic flux density that varies depending on the wire being activated for a large-area receiver according to one embodiment of the present invention.

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0026]

[0027] FIG. 1 is a drawing showing the configuration of a non-contact charging system of a phased array type according to one embodiment of the present invention.

[0028] The phased array type contactless charging system (100) according to the present embodiment may include a processor (110), a bus (120), a network interface (130), a memory (140), and a database (150). The memory (140) may include an operating system (141) and a contactless charging routine (142). The processor (110) may include a transmitter (111), a receiver (112), and a sensor (113). In other embodiments, the phased array type contactless charging system (100) may include more components than those in FIG. 1. However, it is not necessary to clearly illustrate most of the conventional components. For example, the phased array type contactless charging system (100) may include other components such as a display or a transceiver.

[0029] The memory (140) is a computer-readable recording medium, and may include a random access memory (RAM), a read only memory (ROM), and a permanent mass storage device such as a disk drive. In addition, the memory (140) may store program codes for an operating system (141) and a non-contact charging routine (142). These software components may be loaded from a computer-readable recording medium separate from the memory (140) using a drive mechanism (not shown). This separate computer-readable recording medium may include a computer-readable recording medium (not shown) such as a floppy drive, a disk, a tape, a DVD / CD-ROM drive, a memory card, etc. In another embodiment, the software components may be loaded into the memory (140) through a network interface (130) rather than a computer-readable recording medium.

[0030] The bus (120) may enable communication and data transfer between components of the phased array type contactless charging system (100). The bus (120) may be configured using a high-speed serial bus, a parallel bus, a storage area network (SAN), and / or other suitable communication technology.

[0031] The network interface (130) may be a computer hardware component for connecting the phased array type contactless charging system (100) to a computer network. The network interface (130) may connect the phased array type contactless charging system (100) to the computer network via a wireless or wired connection.

[0032] The database (150) can serve to store and maintain all information required for non-contact charging using a phased array method. In FIG. 1, the database (150) is illustrated as being built and included within the non-contact charging system (100) using a phased array method, but is not limited thereto. Depending on the system implementation method or environment, it may be omitted, or the entire database or part of the database may exist as an external database built on a separate system.

[0033] The processor (110) may be configured to process computer program commands by performing basic arithmetic, logic, and input / output operations of a phased array type contactless charging system (100). The commands may be provided to the processor (110) by a memory (140) or a network interface (130) and via a bus (120). The processor (110) may be configured to execute program codes for the transmitter (111), the receiver (112), and the sensor (113). These program codes may be stored in a recording device such as the memory (140).

[0034] The transmitter (111), receiver (112), and sensor (113) can be configured to perform steps (210 to 240) of FIG. 2.

[0035] A phased array type contactless charging system (100) may include a transmitter (111), a receiver (112), and a sensor (113).

[0036] The transmitter (111) according to an embodiment of the present invention is arranged in an array form with at least one horizontal wire and at least one vertical wire intersecting in a cross shape, and does not have a coil shape.

[0037] Installing circular coils in every possible location to allow for free placement of the receiver is highly impractical. To address this issue, the present invention allows the location of the magnetic field reinforcement based on the current phase to be changed to match the receiver, without additional conductors. This allows the receiver to move freely within the corresponding array of transmitters.

[0038] The transmitter (111) according to an embodiment of the present invention changes the phase of the current flowing in at least one horizontal wire and at least one vertical wire intersecting in a cross shape according to the position of the receiver (112). Then, the magnetic flux density at the corresponding array position of the transmitter (111) where the receiver (112) is located changes according to the phase change of the current.

[0039] The transmitter (111) according to an embodiment of the present invention adjusts the magnetic flux density at a desired array location without additional conductors through constructive interference between at least one horizontal wire and at least one vertical wire.

[0040] The transmitter (111) according to the embodiment of the present invention can control the current phase according to the position of the receiver using Coil Detection.

[0041] According to an embodiment of the present invention, when two or more receiving units are positioned on the transmitting unit (111), each of the two or more receiving units is positioned on a different array of the transmitting unit (111), and when the different arrays are adjacent to each other, the transmitting unit (111) activates the overlapping wires of the adjacent arrays so that current flows.

[0042] The transmitter (111) according to an embodiment of the present invention deactivates a wire located within the area of ​​the receiver so that no current flows when the area of ​​one of the receivers is larger than the area of ​​one array of the transmitter (111).

[0043] The receiving unit (112) according to an embodiment of the present invention is positioned on the transmitting unit (111) and includes a coil for receiving a change in a magnetic field according to the array position of the transmitting unit (111), and may include at least one coil.

[0044] The sensor unit (113) according to an embodiment of the present invention recognizes the array position of the transmitter unit (111) where the receiver unit (112) is located.

[0045] The sensor unit (113) according to an embodiment of the present invention recognizes whether an object exists on the transmitting unit (111), and if an object exists on the transmitting unit (111), recognizes whether the object is a receiving unit (112) including a coil. If the object is the receiving unit (112), the sensor unit (113) recognizes the position of the array of the transmitting unit (111) where the receiving unit (112) is located, thereby allowing the transmitting unit (111) to perform WPT (Wireless Power Transfer).

[0046] The sensor unit (113) according to an embodiment of the present invention, when two or more receiving units (112) are positioned on the transmitting unit (111), recognizes the number of receiving units and the position of each receiving unit, and allows the transmitting unit (111) to perform WPT.

[0047]

[0048] FIG. 2 is a flowchart for explaining a non-contact charging method using a phased array method according to one embodiment of the present invention.

[0049] The proposed non-contact charging method of the phased array type includes a step (210) of recognizing the presence of an object on a transmitter having no coil, in which at least one horizontal wire and at least one vertical wire are arranged in an array shape in a cross shape, a step (220) of recognizing, if an object exists on the transmitter, whether the object is a receiver including a coil, a step (230) of recognizing, if the object is a receiver, the number of the receivers, and a step (240) of recognizing, in which the sensor recognizes the array position of the transmitter where each of the receivers is located, so that the transmitter performs WPT (Wireless Power Transfer).

[0050] In step (210), the sensor unit is arranged in an array form with at least one horizontal wire and at least one vertical wire intersecting in a cross shape, and recognizes the presence or absence of an object on a transmitter unit without a coil.

[0051] A transmitter according to an embodiment of the present invention is arranged in an array form with at least one horizontal wire and at least one vertical wire intersecting in a cross shape, and does not have a coil shape.

[0052] In step (220), if an object exists on the transmitting unit, the sensor unit recognizes whether the object is a receiving unit including a coil.

[0053] A receiving unit according to an embodiment of the present invention includes at least one coil positioned on the transmitting unit for receiving a change in a magnetic field according to an array position of the transmitting unit.

[0054] In step (230), if the object is a receiver, the sensor unit recognizes the number of the receiver.

[0055] In step (240), the sensor unit recognizes the array position of the transmitter unit where each of the receiver units is located, and causes the transmitter unit to perform WPT (Wireless Power Transfer).

[0056] According to an embodiment of the present invention, when two or more receiving units are positioned on the transmitting unit, the sensor unit recognizes the number of receiving units and the position of each receiving unit, and causes the transmitting unit to perform WPT.

[0057] According to an embodiment of the present invention, a transmitter changes the phase of a current flowing in at least one horizontal wire and at least one vertical wire intersecting in a cross shape depending on the position of the receiver. Then, the magnetic flux density at the corresponding array position of the transmitter where the receiver is located changes depending on the phase change of the current.

[0058] A transmitter according to an embodiment of the present invention adjusts the magnetic flux density at a desired array location without additional conductors through constructive interference between at least one horizontal wire and at least one vertical wire.

[0059] In an embodiment of the present invention, when two or more receivers are positioned on the transmitter, each of the two or more receivers is positioned on a different array of the transmitter, and when the different arrays are adjacent to each other, the transmitter activates the overlapping wires of the adjacent arrays so that current flows.

[0060] According to an embodiment of the present invention, a transmitter disables a wire located within the area of ​​the receiver so that no current flows when the area of ​​one of the receivers is larger than the area of ​​one array of the transmitters.

[0061]

[0062] FIG. 3 is a drawing for explaining a coil-less, cross-shaped transmitter according to one embodiment of the present invention.

[0063] Fig. 3(a) is a drawing showing a magnetic field when the receiver is located at the lower right (310), and Fig. 3(a) is a drawing showing a magnetic field when the receiver is located at the upper right (320).

[0064] The basic unit of the system, which does not use a circular coil, basically has a cross shape, as shown in Fig. 3. This unit shape can classify space into four, and by changing the phase of the current depending on the location of the receiver, the intensity at a desired location can be controlled through constructive interference between the wires without additional wires. This structure can be repeated continuously to form a large area.

[0065] When the simulation assumes that the receiver is located at the lower right (310) (Fig. 3(a)), the magnetic field reinforcement caused by the two straight wires is generated at the location of the receiver. If the receiver is moved to the upper right (320) (Fig. 3(b)), the phase of the current is changed so that the changed magnetic field reinforcement occurs at the changed receiver.

[0066]

[0067] FIG. 4 is a drawing for explaining a coil-less array-type transmitter according to one embodiment of the present invention.

[0068] The transmitter according to an embodiment of the present invention is arranged in an array form with at least one horizontal wire (411) and at least one vertical wire (412) intersecting in a cross shape, and does not have a coil shape.

[0069] According to an embodiment of the present invention, a transmitter changes the phase of a current flowing in at least one horizontal wire and at least one vertical wire intersecting in a cross shape according to the position of the receiver (421, 422). Then, according to the phase change of the current, the magnetic flux density at the corresponding array position of the transmitter where the receiver (421, 422) is located changes.

[0070] A transmitter according to an embodiment of the present invention adjusts the magnetic flux density at a desired array location without additional conductors through constructive interference between at least one horizontal wire and at least one vertical wire.

[0071]

[0072] FIG. 5 is a drawing for explaining one receiving unit positioned on a transmitting unit according to one embodiment of the present invention.

[0073] Fig. 5(a) is a drawing showing a case where one receiver (510) is positioned on one array of transmitters, and Fig. 5(b) is a drawing showing the magnetic flux density when one receiver (510) is positioned on one array of transmitters.

[0074] When one receiver (510) is positioned on one array of transmitters, the wires (521, 522, 523, 524) surrounding the receiver are activated so that current flows.

[0075] According to an embodiment of the present invention, a transmitter changes the phase of a current flowing in at least one horizontal wire and at least one vertical wire intersecting in a cross shape according to the position of the receiver (510). Then, according to the phase change of the current, the magnetic flux density at the corresponding array position of the transmitter where the receiver (510) is located changes.

[0076]

[0077] FIG. 6 is a drawing for explaining a plurality of receiving units positioned on a transmitting unit according to one embodiment of the present invention.

[0078] FIG. 6(a) is a drawing showing a state in which current does not flow in overlapping wires when each of two receivers (611, 612) is positioned on a different array of the transmitter, and FIG. 6(b) is a drawing showing a state in which current is activated when each of two receivers (611, 612) is positioned on a different array of the transmitter, and so on.

[0079] FIG. 6(a) is a drawing showing a state in which wires (621, 622, 623, 624) surrounding two receivers (611, 612) are activated so that current flows, and overlapping wires are deactivated so that current does not flow, when each of the two receivers (611, 612) is located on a different array of the transmitter.

[0080] FIG. 6(b) is a drawing showing a state in which current is activated to flow through wires (621, 622, 623, 624) surrounding two receivers (611, 612) when each of the two receivers (611, 612) is positioned on a different array of the transmitter, and current is activated to flow through overlapping wires (625).

[0081] The transmitter according to an embodiment of the present invention activates the overlapping wires (625) to cause current to flow when each of the two receivers (611, 612) is positioned on a different array of the transmitter, thereby further increasing the magnetic flux density.

[0082]

[0083] FIG. 7 is a graph showing the magnetic flux density that varies depending on the wire being activated for a plurality of receivers according to one embodiment of the present invention.

[0084] Fig. 7(a) is a diagram showing the magnetic flux density in a state where current does not flow in overlapping wires when each of two receivers is located on a different array of transmitters, and Fig. 7(b) is a diagram showing the magnetic flux density in a state where current is activated so that overlapping wires flow when each of two receivers is located on a different array of transmitters.

[0085] Comparing Fig. 7(a) and Fig. 7(b), it can be seen that when each of the two receivers is located on a different array of the transmitter, the magnetic flux density is further increased by activating the overlapping wires so that current flows.

[0086]

[0087] FIG. 8 is a drawing for explaining a large-area receiving unit located on a transmitting unit according to one embodiment of the present invention.

[0088]

[0089] The transmitter (111) according to an embodiment of the present invention deactivates a wire located within the area of ​​the receiver so that no current flows when the area of ​​one of the receivers is larger than the area of ​​one array of the transmitter (111).

[0090] FIG. 8(a) is a drawing showing a state in which a current is activated to flow in a wire located within the area of ​​a receiving unit (810) when the area of ​​one receiving unit (810) is larger than the area of ​​one array of transmitting units, and FIG. 8(b) is a drawing showing a state in which a current is deactivated to prevent flow in a wire located within the area of ​​a receiving unit (810) when the area of ​​one receiving unit (810) is larger than the area of ​​one array of transmitting units.

[0091] FIG. 8(a) is a drawing showing a state in which, when the area of ​​one receiving unit (810) is larger than the area of ​​one array of transmitting units, current is activated to flow in wires (821, 822, 823, 824) surrounding the receiving unit (810), and current is activated to flow in wires (825) located within the area of ​​the receiving unit (810).

[0092] FIG. 8(b) is a drawing showing a state in which, when the area of ​​one receiving unit (810) is larger than the area of ​​one array of transmitting units, wires (821, 822, 823, 824) surrounding the receiving unit (810) are activated so that current flows, and wires located within the area of ​​the receiving unit (810) are deactivated so that current does not flow.

[0093] According to an embodiment of the present invention, when the area of ​​one receiving unit (810) is larger than the area of ​​one array of the transmitting unit, the transmitting unit deactivates the wire located within the area of ​​the receiving unit (810) so that no current flows, thereby further increasing the magnetic flux density.

[0094]

[0095] FIG. 9 is a graph showing the magnetic flux density that varies depending on the wire being activated for a large-area receiver according to one embodiment of the present invention.

[0096] FIG. 9(a) is a diagram showing the magnetic flux density in a state where current flows in a wire located within the area of ​​the receiver when the area of ​​one receiver is larger than the area of ​​one array of the transmitter, and FIG. 9(b) is a diagram showing the magnetic flux density in a state where current does not flow in a wire located within the area of ​​the receiver when the area of ​​one receiver is larger than the area of ​​one array of the transmitter.

[0097] Comparing Fig. 9(a) and Fig. 9(b), it can be seen that when the area of ​​one receiving section is larger than the area of ​​one array of transmitting sections, the magnetic flux density increases further when the wires located within the area of ​​the receiving section are deactivated so that no current flows.

[0098]

[0099] The devices described above may be implemented as hardware components, software components, and / or a combination of hardware components and software components. For example, the devices and components described in the embodiments may be implemented using one or more general-purpose computers or special-purpose computers, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), a programmable logic unit (PLU), a microprocessor, or any other device capable of executing instructions and responding to them. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to the execution of the software. For ease of understanding, the processing device is sometimes described as being used alone; however, one of ordinary skill in the art will recognize that the processing device may include multiple processing elements and / or multiple types of processing elements. For example, a processing unit may include multiple processors, or a processor and a controller. Other processing configurations, such as parallel processors, are also possible.

[0100] Software may include a computer program, code, instructions, or a combination of one or more of these, which may configure a processing device to perform a desired operation or may independently or collectively command the processing device. The software and / or data may be embodied in any type of machine, component, physical device, virtual equipment, computer storage medium, or device for interpretation by the processing device or for providing instructions or data to the processing device. The software may be distributed over networked computer systems and stored or executed in a distributed manner. The software and data may be stored on one or more computer-readable recording media.

[0101] The method according to the embodiment may be implemented in the form of program commands that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program commands, data files, data structures, etc., alone or in combination. The program commands recorded on the medium may be those specially designed and configured for the embodiment or may be those known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specially configured to store and execute program commands such as ROMs, RAMs, and flash memories. Examples of program commands include not only machine language codes generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc.

[0102] Although the embodiments described above have been described by way of limited examples and drawings, those skilled in the art will appreciate that various modifications and variations can be made based on the above teachings. For example, appropriate results can still be achieved even if the described techniques are performed in a different order than described, and / or components of the described systems, structures, devices, circuits, etc. are combined or combined in a different manner than described, or are replaced or substituted with other components or equivalents.

[0103] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims described below.

Claims

1. A transmitter without a coil, wherein at least one horizontal wire and at least one vertical wire are arranged in an array shape in a cross shape; At least one receiving unit including a coil positioned on the transmitting unit for receiving a change in a magnetic field according to an array position of the transmitting unit; and A sensor unit for recognizing the array position of the transmitter unit where the receiver unit is located A contactless charging system including:

2. In paragraph 1, The above transmitter, Depending on the position of the receiver, the phase of the current flowing in at least one horizontal wire and at least one vertical wire intersecting in the cross shape is changed. Contactless charging system.

3. In paragraph 2, The above transmitter, The magnetic flux density at the corresponding array location of the transmitter where the receiver is located changes according to the phase change of the current. Contactless charging system.

4. In paragraph 3, The above transmitter, Controlling the magnetic flux density at a desired array location without additional conductors through constructive interference between at least one transverse wire and at least one vertical wire. Contactless charging system.

5. In paragraph 1, The above transmitter, When two or more receivers are located on the transmitter, When each of the two or more receiving units is positioned on a different array of the transmitting unit, and the different arrays are adjacent to each other, current is activated to flow in the overlapping wires of the adjacent arrays. Contactless charging system.

6. In paragraph 1, The above transmitter, If the area of ​​one of the above-mentioned receiving units is larger than the area of ​​one array of the above-mentioned transmitting units, the wires located within the area of ​​the above-mentioned receiving units are disabled so that no current flows. Contactless charging system.

7. In paragraph 1, The above sensor part, Recognize the presence of an object on the above transmitter, When an object exists on the above transmitter, it is recognized whether the object is a receiver including a coil, If the above object is a receiver, the position of the array of the transmitter where the receiver is located is recognized, and the transmitter performs WPT (Wireless Power Transfer). Contactless charging system.

8. In paragraph 7, The above sensor part, When two or more receivers are located on the transmitter, the number of receivers and the location of each receiver are recognized, and the transmitter performs WPT. Contactless charging system.

9. A step for recognizing the presence of an object on a transmitter without a coil, wherein the sensor unit is arranged in an array form with at least one horizontal wire and at least one vertical wire intersecting in a cross shape; When an object exists on the above transmitting unit, a step of the sensor unit recognizing whether the object is a receiving unit including a coil; If the object is a receiver, a step of the sensor unit recognizing the number of the receiver; and A step in which the sensor unit recognizes the array position of the transmitter unit where each of the receiver units is located, and the transmitter unit performs WPT (Wireless Power Transfer). A non-contact charging method comprising:

10. In paragraph 9, The step of causing the sensor unit to recognize the array position of the transmitter unit where each of the receiver units is located, and the transmitter unit to perform WPT is as follows: The above transmitter changes the phase of the current flowing in at least one horizontal wire and at least one vertical wire intersecting in the cross shape according to the position of the above receiver. Contactless charging method.

11. In paragraph 10, The step of causing the sensor unit to recognize the array position of the transmitter unit where each of the receiver units is located, and the transmitter unit to perform WPT is as follows: The magnetic flux density at the corresponding array location of the transmitter where the receiver is located changes according to the phase change of the current. Contactless charging method.

12. In paragraph 11, The step of causing the sensor unit to recognize the array position of the transmitter unit where each of the receiver units is located, and the transmitter unit to perform WPT is as follows: The magnetic flux density at a desired array location is controlled through constructive interference between at least one transverse wire and at least one longitudinal wire without additional conductors. Contactless charging method.

13. In paragraph 9, The step of causing the sensor unit to recognize the array position of the transmitter unit where each of the receiver units is located, and the transmitter unit to perform WPT is as follows: When two or more receivers are located on the transmitter, When each of the two or more receiving units is positioned on a different array of the transmitting unit, and the different arrays are adjacent to each other, current is activated to flow in the overlapping wires of the adjacent arrays. Contactless charging method.

14. In paragraph 9, The step of causing the sensor unit to recognize the array position of the transmitter unit where each of the receiver units is located, and the transmitter unit to perform WPT is as follows: If the area of ​​one of the above-mentioned receiving units is larger than the area of ​​one array of the above-mentioned transmitting units, the wires located within the area of ​​the above-mentioned receiving units are disabled so that no current flows. Contactless charging method.

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