KR20130128047A - Antenna altitude control device and system and device for wireless power transmission using the same - Google Patents

Abstract

An antenna posture control device is provided. The antenna posture control device comprises; an antenna part which wirelessly transmits or receives power; a sensor part which measures the posture of the antenna part and produces posture measuring information; a control part which produces a posture control signal controlling the posture of the antenna part based on the posture measuring information; a driving part which controls the posture of the antenna part by receiving the posture control signal from the control part.

Description

Antenna attitude control device and wireless power transmission device using same, wireless power transmission system {Antenna Altitude Control Device and System and Device for Wireless Power Transmission using the same}

The present invention relates to an antenna attitude control apparatus, an antenna attitude control method, and a wireless power transmission method using the same.

Recently, interest in energy-IT convergence technology is increasing. Energy-IT convergence technology refers to the convergence of IT technology that is rapidly developing in the conventional energy technology, there is a wireless power transfer (WPT) technology as one field of such energy-IT convergence technology. Wireless power transmission refers to a technology of supplying power to home appliances or electric vehicles wirelessly instead of the conventional wired power line. In order to charge home appliances, a power cable wired from a power outlet to a home appliance or a charger is used. Related research is being actively conducted because of the advantage of being able to charge home appliances wirelessly without a connection.

The wireless power transmission technology currently commercialized or researched can be classified into four types. One of them is a high power microwave radiation method, which can transmit a long distance because it can transmit a high power using a frequency of several GHz band, while it is not commercialized due to problems such as harmfulness to human body and straightness. The other is the near field transmission method of the radial method, which is an RFID service using the RFID / USN frequency band of the UHF (Ultra High Frequency) band or the 2.4 GHz ISM band, and is currently scheduled for distribution and logistics. It is commercially available in the field, and has a disadvantage in that only up to several tens of mW can be transmitted by radiation loss. On the other hand, the contact transmission method using inductive coupling is a method of transmitting power of several W in a contact type at a distance of several mm to several cm, and uses a frequency such as 125 kHz or 135 kHz. It is applied to the electric toothbrush. On the other hand, non-radiated magnetic resonance method is based on the resonant coupling (resonant coupling) method. Resonant coupling refers to a phenomenon in which electromagnetic waves move from one medium to another through a near-field magnetic field when two media resonate at the same frequency in the case of magnetic resonance. The advantage is that transmission is possible. However, it is necessary to keep the Q (Quality Factor) value of the resonator high for practical implementation.

On the other hand, power transmission efficiency according to the positional relationship between the transmission antenna of the wireless power transmitter (hereinafter referred to as a transmitter) and the power receiving antenna of the wireless power receiver (hereinafter referred to as a power receiver) in an induction electromotive force or a self-resonant wireless power transmission system. This is different. In addition, in the case of a wireless power transmission system having one or more power receivers, an attitude adjustment with the power transmission antenna is required for each power receiver antenna for optimum power efficiency.

Korean Patent Publication No. 2011-0131954, "Wireless Power Transmission Device and Method Thereof"

In order to solve the above problems of the prior art, the present invention provides a wireless power transmission method and a wireless power transmission apparatus capable of maximizing power transmission efficiency between one or more wireless power receiver and a wireless power transmitter.

In addition, the present invention provides an antenna attitude control apparatus and method that can store the position information of a plurality of wireless power receivers in the wireless power transmission apparatus to transmit power to the respective wireless power receivers with optimal efficiency.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

In order to achieve the above object, the antenna attitude control apparatus according to an aspect of the present invention, the antenna unit for transmitting or receiving power wirelessly, the sensor unit for measuring the posture of the antenna unit and generates posture measurement information, the posture measurement And a controller configured to generate an attitude control signal for controlling the attitude of the antenna unit based on information, and a driver configured to receive the attitude control signal from the controller and adjust the attitude of the antenna unit.

Here, the sensor unit may generate the posture measurement information by measuring data regarding at least one of a rotation amount, a rotation speed, a tilt, and a direction of the antenna unit.

Here, the controller generates position information on an external wireless power transmitter based on a change in power transmission amount according to a change in attitude of the antenna unit, and transmits the attitude control signal so that the antenna unit faces a direction corresponding to the position information. Can be generated.

Here, the control unit may generate the posture control signal so that the central axis of the antenna unit faces the center direction of the antenna unit of the external wireless power transmitter.

Here, the control unit may generate and manage one or more location information of each wireless power transmitter when there is more than one external wireless power transmitter.

In addition, the wireless power transmission apparatus according to another aspect of the present invention includes an antenna unit for transmitting power wirelessly to the wireless power receiver and an antenna attitude control device for controlling the power transmission efficiency by controlling the attitude of the antenna unit, The antenna posture control device may include a sensor unit configured to measure a posture of the antenna unit and generate posture measurement information, and a controller configured to generate a posture control signal for controlling the posture of the antenna unit based on the generated posture measurement information. Receiving an attitude control signal includes a driver for adjusting the attitude of the antenna unit.

Here, the controller generates position information on the wireless power receiver based on a change in power transmission amount according to a change in attitude of the antenna unit, and transmits the attitude control signal so that the antenna unit faces a direction corresponding to the position information. Can be generated.

Here, the sensor unit may generate the posture measurement information by measuring data regarding at least one of a rotation amount, a rotation speed, a tilt, and a direction of the antenna unit.

Here, the controller may generate and manage location information for each wireless power receiver when there are a plurality of wireless power receivers.

The antenna attitude control apparatus may further include a communication unit configured to communicate with the wireless power receiver.

In addition, the wireless power receiver according to another aspect of the present invention, the antenna unit for receiving the power transmitted wirelessly from the wireless power transmission apparatus and the antenna attitude control device for controlling the power transmission efficiency by controlling the attitude of the antenna unit The antenna attitude control apparatus includes: a sensor unit configured to measure the attitude of the antenna unit and generate attitude measurement information, a controller configured to generate an attitude control signal for controlling the attitude of the antenna unit based on the generated attitude measurement information; And a driver configured to receive the attitude control signal from the controller and adjust the attitude of the antenna unit.

The antenna attitude control apparatus may further include a communication unit configured to communicate with the wireless power transmitter, and the controller transmits the positional information about the wireless power transmitter to the wireless power transmitter using the communication unit. Can be.

Here, the controller generates position information on the wireless power transmitter based on a change in power transmission amount according to a change in attitude of the antenna unit, and transmits the attitude control signal so that the antenna unit faces a direction corresponding to the position information. Can be generated.

In addition, a wireless power transmission system according to another aspect of the present invention includes a wireless power transmission device for transmitting power wirelessly through a transmission antenna and at least one wireless power receiving device for receiving the transmitted power through a power receiving antenna. The wireless power transmitter may include a transmission antenna attitude control device configured to control a posture of the power transmission antenna, and the transmission antenna attitude control device may include a sensor unit configured to measure the attitude of the power transmission antenna and generate attitude measurement information. And a controller configured to generate a posture control signal for controlling the posture of the power transmission antenna based on the generated posture measurement information, and a driver to receive the posture control signal from the controller and adjust the posture of the power transmission antenna. The change of power transmission amount according to the change of attitude of the transmission antenna Second generating location information of the power reception antenna, and generates a position control signal for the power transmission antenna based on the position information of the power reception antenna.

Here, the wireless power receiver further includes a power receiving antenna posture control device for controlling the posture of the power receiving antenna, wherein the power receiving antenna posture control device measures a posture of the power receiving antenna and generates posture measurement information. A sensor unit configured to adjust the posture of the power receiving antenna by receiving the posture control signal from the power receiving side controller and the power receiving side controller to generate a posture control signal for controlling the posture of the power receiving antenna based on the generated posture measurement information; And a power receiving side driver, wherein the power receiving side controller generates position information of the power transmission antenna based on a change in power transmission amount according to a change in posture of the power reception antenna, and the power reception antenna based on the position information of the power transmission antenna. It is possible to generate a posture control signal for.

Here, the wireless power receiver further comprises a communication unit for transmitting the generated position information of the transmission antenna to the wireless power transmitter, in the transmission antenna attitude control device, the control unit is the position information of the transmitted power antenna Reflecting this, the position information of the power receiving antenna may be generated, and the attitude control signal for the power transmission antenna may be generated based on the position information of the power receiving antenna.

Here, the control unit may generate the posture control signal so that the center axis of the power transmission antenna faces the center direction of the power reception antenna.

Here, in the wireless power transmitter, the controller may allocate an identification ID to each of the one or more wireless power receivers, and match and store the identification ID and position information of each power receiving antenna.

In addition, the wireless power transmission method in the wireless power transmission apparatus according to another aspect of the present invention, detecting the wireless power receiver, changing the attitude of the transmission antenna and changes the amount of power transmission to the wireless power receiver. Measuring, generating position information of the wireless power receiver based on the measured change in the amount of power transmission, and generating a posture control signal by the controller so that the transmission antenna faces a direction corresponding to the position information And adjusting, by a driver, the posture of the power transmission antenna in response to the posture control signal, and receiving power from the wireless power receiver by the power transmission antenna.

The generating of the location information may include receiving location information on the power transmission antenna from the wireless power receiver and reflecting location information on the received power transmission antenna to obtain location information of the wireless power reception device. The method may further include generating.

The generating of the location information may include generating at least one location information of each of the wireless power receivers when the at least one wireless power receiver is present, and generating the at least one location information from each of the wireless devices. The method may further include matching and storing an identification ID allocated to each power receiver.

In addition, the wireless power transmission method in the wireless power receiver according to another aspect of the present invention, detecting the wireless power transmitter, changing the attitude of the power receiving antenna and changes the amount of power transmission from the wireless power transmitter Measuring, generating position information on the power transmission antenna of the wireless power transmitter based on the measured change in the amount of power transmission, and controlling the posture control signal so that the power receiving antenna faces a direction corresponding to the position information Generating a control method, the driver adjusts the posture of the power receiving antenna according to the posture control signal, and the power receiving antenna includes receiving power from the wireless power transmitter.

Here, after generating the location information, the method may further include transmitting the generated location information to the wireless power transmitter.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It is provided to fully inform the owner of the scope of the invention.

According to one of the problem solving means of the present invention described above, it is possible to increase the power transmission efficiency between a plurality of wireless power transmission apparatus.

In addition, according to one of the above-described problem solving means of the present invention, the wireless power transmission apparatus may store the location information of the plurality of wireless power receivers to increase the power transmission rate to each of the wireless power receivers.

1 is a diagram illustrating a general wireless power transmission apparatus.
2 is a schematic diagram illustrating a wireless power transmission system according to an embodiment of the present invention.
3 is a view for explaining a wireless power transmission system according to an embodiment of the present invention.
4 is a detailed block diagram of a wireless power transmission apparatus according to an embodiment of the present invention.
5 is a detailed configuration diagram of a wireless power receiver according to an embodiment of the present invention.
6 is a flowchart illustrating a wireless power transmission method to a plurality of wireless power receivers in a wireless power transmission system according to an embodiment of the present invention.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

In the present specification, the charging device is a mobile device equipped with a rechargeable battery, and is a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP). ), Navigation, and the like.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a general wireless power transmission apparatus.

As shown in FIG. 1, a wireless power transmission apparatus uses a magnetic induction or magnetic resonance method between a wireless power transmitter (hereinafter, referred to as a power transmitter) 10 and a wireless power receiver (hereinafter, referred to as a power receiver) 20. Send it.

The power transmitter 10 converts an AC power input from an external input power source 12 into an electromagnetic signal through an internal circuit such as a rectifier (not shown), a power amplifier (not shown), and then transmits the power transmission antenna 11. Transmission to the power receiver 20 through.

The power receiver 20 receives the electromagnetic wave signal transmitted from the power transmitter 10. To this end, the power receiver 20 may be provided with a power receiving antenna 21.

In the magnetic resonance method, the resonant frequencies of the power transmitting antenna 11 and the power receiving antenna 21 are preferably the same or almost the same. In this case, an energy transfer channel is formed between the power transmitting antenna 11 and the power receiving antenna 21 by resonant coupling. Electromagnetic waves emitted from the power transmission antenna 11 are transmitted to the power receiving antenna 21 through an energy transmission channel, and the electromagnetic waves input through the power receiving antenna 21 are impedance matching circuits (not shown) in the power receiver 20. It is converted into electric power through a circuit such as a rectifier (not shown). The converted power is transferred to the load device 30 connected to the power receiver 20 to charge the load device 30 or provide driving power.

In the case of using the magnetic induction method, the resonant frequencies of the power transmitting antenna 11 and the power receiving antenna 21 do not have to be almost the same frequency. However, by matching the resonant frequencies of the power transmitting antenna 11 and the power receiving antenna 21 almost identically, It is possible to improve the power transfer efficiency between both ends.

Hereinafter, a wireless charging system according to an embodiment of the present invention will be described with reference to FIG. 2 based on the wireless power transmission method described above.

2 is a schematic diagram illustrating a wireless power transmission system according to an embodiment of the present invention.

As shown in FIG. 2, the wireless power transmission system according to an exemplary embodiment of the present invention includes a wireless power transmitter 100 and one or more wireless power receivers 200 that receive power through the wireless power transmitter 100. -1 to 200-5).

As shown in FIG. 2, the wireless power transmission system may be installed in a space having a predetermined size inside a room or a building. The apparatus 100 for transmitting power wirelessly may be located at the center of the room so as not to be the longest distance with respect to the apparatus 200 for receiving wireless power installed in any position of the room. In FIG. 2, the coupling of the wireless power transmitter 100 to the ceiling lamp is illustrated as an example, but various locations and installation methods may be applied. In addition, in some embodiments, two or more wireless power transmitters 100 may be installed in the same space to reduce an average distance between the wireless power transmitter 100 and the wireless power receiver 200.

The wireless power receiver 200 that can be used includes, for example, an electric stand 200-1, a digital picture frame 200-2, a TV or monitor 200-3, a wired or wireless telephone, or the like as illustrated in FIG. 2. It may include a smartphone 200-4 and a notebook or tablet 200-5.

Wireless power transmission between the wireless power transmitter 100 and the wireless power receivers 200-1 to 200-5 may be performed simultaneously or sequentially, in this case, the wireless power receivers 200-1 to 200-5. In order to transmit power in the most efficient manner according to each position of h), the alignment between the transmitting antenna and each receiving antenna may be optimized.

Referring to FIG. 3, in a wireless power transmission system composed of one wireless power transmitter 100 and a plurality of wireless power receivers 200-1 to 200-n, the wireless power receivers 200-1 to 200- n) may be disposed at different locations, and the wireless power receiver in which the power transmission antenna 180 of the wireless power transmitter 100 receives power in order to transmit power to each wireless power receiver with optimum efficiency. The attitude of the power transmission antenna 180 may be adjusted to face the power receiving antenna of the antenna.

For example, when the wireless power transmitter 100 transmits power to the wireless power receiver 210-2, the center axis of the power transmission antenna 180 and the center axis of the power receiving antenna 210-2 are aligned with each other. It is preferable to adjust the attitudes of the power transmitting antenna 180 and the power receiving antenna 210-2, respectively.

In some cases, the power receiving antenna of the wireless power receiver may be fixed. Even in this case, it is preferable to adjust the attitude of the power transmission antenna 180 so that the center axis of the power transmission antenna 180 faces the center of the power reception antenna for optimum power transmission efficiency.

Hereinafter, a detailed configuration of a wireless power transmission apparatus in a wireless power transmission system according to an embodiment of the present invention will be described.

4 is a detailed block diagram of a wireless power transmission apparatus according to an embodiment of the present invention.

As shown in FIG. 4, the apparatus 100 for transmitting power wirelessly according to an embodiment of the present invention includes a rectifier 110, a voltage amplifier 120, a matching circuit 130, a controller 140, and a driver 150. , The sensor unit 170 and the power transmission antenna 180. In addition, the wireless power receiving apparatus 200 may further include a communication unit 160 for performing communication.

The external power source 105 is provided to the wireless power transmission apparatus 100. The external power source 105 is input to the rectifier 110 and converted into a DC power source, and the converted DC power source is converted into an arbitrary voltage by the voltage amplifier 120.

The matching circuit 130 changes the resonant frequency of the power transmission antenna 180. In detail, the matching circuit 130 may be positioned at the front end of the power transmission antenna 180 to match the impedance of the front end of the power transmission antenna 180 and the matching circuit 130. To this end, the matching circuit 130 may include a variable capacitor, or may include a parallel array structure in which a plurality of circuits in which capacitors and FET switches are directly connected are connected in parallel. In this case, the variable capacitor or the parallel array may be connected in series or in parallel with the power transmission antenna 180 to change the resonance frequency of the power transmission antenna 180 by changing the capacitance value of the matching circuit 130.

The power transmission antenna 180 wirelessly transmits power. In more detail, the power transmission antenna 180 may transmit power to the wireless power receiver 200 according to a control signal of the controller 140 to be described later. In this case, the transmitted power may be transmitted in the form of an RF energy signal. In addition, the power transmitting antenna 180 and the power receiving antenna preferably have the same or approximate resonance frequency.

At this time, the configuration of the power transmission antenna 180 may be different according to the wireless power transmission method. For example, when the wireless power transmission system is implemented in a magnetic induction scheme, the power transmission antenna 180 may be configured as a single loop antenna. On the other hand, when the wireless power transmission system is implemented in a magnetic resonance method, the power transmission antenna 180 may be configured as a pair of a power transmission coil and a resonant coil for power transmission. In addition, the power transmission antenna 180 may be implemented in a loop form. For example, the power transmission antenna 180 may be in the form of a spiral loop or a helical loop.

The power transmission antenna 180 may be adjusted in any direction and angle by the antenna attitude control device. To this end, the transmission antenna attitude control apparatus according to an embodiment of the present invention may include a controller 140, a driver 150, and a sensor unit 170.

The sensor unit 170 generates posture measurement information by measuring a posture of the power transmission antenna 180. The attitude measurement information may include a rotation amount, a rotation speed, a tilt, and an angle of the transmission antenna 180 toward the transmission antenna 180. Examples of the sensor unit 170 may include a rotational encoder, a tachometer, an inclinometer, a gyro sensor, and the like.

In addition, when the posture of the power transmission antenna 180 is changed by the operation of the driving unit 150, the sensor unit 170 may measure a change in the posture of the power transmission antenna 180 and feed it back to the controller 140.

The driver 150 receives the posture control signal from the controller 140 and adjusts the posture of the power transmission antenna 180 accordingly. The driver 150 may be, for example, an AC motor, a DC motor, a stepping motor, a hydraulic motor, or any power device that performs a similar function.

The controller 140 may control the driver 150 to adjust the posture of the power transmission antenna 180. In detail, the controller 140 generates an attitude control signal for controlling the attitude of the power transmission antenna 180 using the attitude measurement information of the power transmission antenna 180 measured by the sensor unit 170.

In addition, the controller 140 analyzes the change of the power transmission amount according to the change in the attitude of the power transmission antenna 180 to determine the direction in which the wireless power receiver 200 receiving the power is located in the wireless power receiver 200. Location information may be generated.

The controller 140 may generate the posture control signal so that the power transmission antenna 180 faces the power receiving antenna of the wireless power receiving apparatus 200 by using the generated location information of the wireless power receiving apparatus 200. The controller 140 may transmit the generated posture control signal to the driver 150.

In addition, while the power transmission antenna 180 adjusts the posture of the power transmission antenna 180 by the driver 150 toward the power reception antenna of the wireless power receiver 200, the sensor unit 170 transmits the power transmission antenna 180. The posture measurement information may be generated by measuring a change in posture of the posture, and fed back to the controller 140. The controller 140 may perform posture control of the power transmission antenna 180 by reflecting the feedbacked attitude measurement information.

The controller 140 may set a unique identification ID for the wireless power receiver. The set identification ID may be stored and managed by matching the location information of the wireless power receiver. If power is transmitted to a plurality of wireless power receivers, a unique identification ID may be assigned to each wireless power receiver. In this way, the controller 140 may distinguish a plurality of wireless power receivers, and store and manage location information of each of the wireless power receivers 200. Power can be transmitted with optimal transmission efficiency.

Meanwhile, the apparatus 100 for transmitting power wirelessly may further include a communicator 160 for performing communication with the apparatus 200 for receiving power wirelessly. The apparatus 100 for transmitting power wirelessly may transmit and receive a message with the apparatus 200 for receiving power through the communication unit 160. To this end, the communication unit 160 may transmit a message through the magnetic field communication or the load modulation communication using the power transmission antenna 180, or may further include a separate communication antenna (not shown) for communication.

Next, a detailed configuration of the wireless power receiver will be described.

5 is a detailed configuration diagram of a wireless power receiving apparatus according to an embodiment of the present invention.

As shown in FIG. 5, the wireless power receiver 200 includes a power receiving antenna 210, a matching circuit 220, a rectifier 230, and a power amplifier 240, and further includes a rechargeable battery 250. ) May be further included. The description of the matching circuit 220, the rectifier 230, and the power amplifier 240 will be omitted as described with reference to FIG. 4.

The wireless power receiver 200 may receive power transmitted from the wireless power transmitter 100 through the power receiving antenna 210, and the received power may be converted into usable components through the above components to allow the wireless power receiver 200 to receive the power. It may be used as a power supply or for charging the battery 250 or an external load device.

Meanwhile, in another embodiment of the present invention, the wireless power receiver 200 may control the posture of the power receiving antenna 210 separately from the wireless power transmitter 100. In this case, in addition to adjusting the attitude of the power transmission antenna 180 in the wireless power transmitter 100, the power reception antenna 210 of the wireless power receiver 200 may be adjusted to face the power transmission antenna 180 to transmit power. The efficiency can be further improved.

In FIG. 5, the power receiving antenna 210 may be adjusted by the power receiving antenna attitude control apparatus. At this time, the receiving antenna attitude control apparatus according to another embodiment of the present invention may include a driving unit 260, a control unit 270 and a sensor unit 280.

The driver 260 receives the posture control signal from the controller 270 and adjusts the posture of the power receiving antenna 210 accordingly. Such a drive unit 260 may be, for example, an AC motor, a DC motor, a stepping motor, a hydraulic motor, or any power device that performs a similar function.

The controller 270 may adjust the attitude of the power receiving antenna 210 through the control of the driver 260. In more detail, the controller 270 analyzes a change in power transmission amount according to a change in posture of the power receiving antenna 210 to determine the direction in which the wireless power transmitter 100 is located, and thereby the position of the wireless power transmitter 100. Information can be generated.

In addition, the controller 270 may generate the posture control signal so that the power reception antenna 210 faces the power transmission antenna 180 of the wireless power transmission apparatus 100 using the generated location information of the wireless power transmission apparatus 100. Can be.

Meanwhile, when a plurality of wireless power transmitters 100 are detected, the controller 270 may set an identification ID for each wireless power transmitter 100. Through this, wireless power transmission from each wireless power transmission apparatus 100 may be controlled.

The sensor unit 280 measures the posture of the power receiving antenna 210 to generate posture measurement information. In addition, the sensor unit 280 may measure the posture variation state of the power receiving antenna 210 by the driving unit 260 to feed back to the control unit 270. The controller 270 may correct the control of the power receiving antenna 210 by reflecting the feedbacked attitude measurement information, thereby enabling precise posture control of the power receiving antenna 210.

The wireless power receiver 200 may further include a communication unit 290 which communicates with the communication unit 160 of the wireless power transmission apparatus 100. The control unit 270 may transmit location information about the wireless power transmitter 100 to the wireless power transmitter 100 using the communication unit 290, and the wireless power transmitter 100 may transmit the received power to the wireless power transmitter 100. The attitude control signal of the power receiving antenna 210 may be generated with reference to the location information.

As a result, the apparatus 100 for transmitting power wirelessly may know an approximate direction in which the power receiving antenna 180 is located from the location information. An effect that can be obtained accurately occurs.

Next, a wireless power transmission method in a wireless power transmission system according to an embodiment of the present invention will be described.

6 is a flowchart illustrating a method of transmitting wireless power to a plurality of wireless power receivers in a wireless power transmission system according to an embodiment of the present invention.

Referring to FIG. 6, first, the wireless power transmitter 100 scans whether there is a wireless power receiver 200 in the vicinity (S202). In detail, the apparatus 100 for transmitting power wirelessly radiates a ping signal to the outside through a transmission antenna in order to scan for the existence of a surrounding apparatus 200 for receiving power wirelessly. The wireless power receiver 200 receiving the ping signal transmits a response signal corresponding to the ping signal to the wireless power transmitter 100 through the power receiving antenna 210. The wireless power transmitter 100 receiving the response signal may recognize that the wireless power receiver 200 is nearby (S204).

Thereafter, the wireless power transmitter 100 wirelessly transmits power to the wireless power receiver 200 (S206). At this time, the controller 140 of the wireless power transmitter 100 changes the attitude of the power transmission antenna 180 by controlling the driver 150 and measures a change in the amount of power transmitted to the wireless power receiver 200 (S208). ). The controller 140 searches for a posture of the power transmission antenna 180 in a direction in which the amount of power to be transmitted is maximum (S210), and uses a position of the wireless power receiver 200 to locate the location using the retrieved posture information. Generates information (S212).

Subsequently, the controller 140 of the wireless power transmitter 100 generates an attitude control signal for controlling the power transmission antenna 180 using the position information of the wireless power receiver 200 (S214). The posture control signal is transmitted to the driver 150.

Thereafter, the driver 150 adjusts the attitude of the power transmission antenna 180 according to the attitude control signal (S216), and the wireless power transmitter 100 transmits power through the power transmission antenna 180.

According to an exemplary embodiment, the posture of the power receiving antenna 210 may be adjusted in the wireless power receiver 200 so that the power receiving antenna 210 faces the power transmission antenna 180. In this case, it is necessary to exchange operation time information between the wireless power transmitter 100 and the wireless power receiver 200 so that the posture adjustment of the power reception antenna 210 and the posture adjustment of the power transmission antenna 180 are not performed at the same time. .

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims (23)

In the antenna attitude control apparatus,
An antenna unit for transmitting or receiving power wirelessly,
A sensor unit for measuring the posture of the antenna unit and generating posture measurement information;
A controller configured to generate an attitude control signal for controlling the attitude of the antenna unit based on the attitude measurement information;
A driver configured to receive the attitude control signal from the controller and adjust the attitude of the antenna;
Antenna attitude control device comprising a. The method of claim 1,
And the sensor unit generates the attitude measurement information by measuring data regarding at least one of a rotation amount, a rotation speed, an inclination, and a direction of the antenna unit. The method of claim 1,
The controller generates position information on an external wireless power transmitter based on a change in power transmission amount according to a change in attitude of the antenna unit, and generates the attitude control signal so that the antenna unit faces a direction corresponding to the position information. Antenna posture control device. The method of claim 1,
And the control unit generates the posture control signal such that a central axis of the antenna unit faces a center direction of the antenna unit of the external wireless power transmitter. The method of claim 1,
And the controller generates and manages one or more position information for each wireless power transmitter when the external wireless power transmitter is one or more. In the wireless power transmission apparatus,
An antenna unit for wirelessly transmitting power to a wireless power receiver;
An antenna attitude control apparatus for controlling the power transmission efficiency by controlling the attitude of the antenna unit,
The antenna attitude control device,
A sensor unit for measuring the posture of the antenna unit and generating posture measurement information;
A controller configured to generate a posture control signal for controlling the posture of the antenna unit based on the generated posture measurement information;
And a driver configured to receive the attitude control signal from the controller and adjust the attitude of the antenna unit. The method according to claim 6,
The controller generates position information on the wireless power receiver based on a change in power transmission amount according to a change in attitude of the antenna unit, and generates the attitude control signal so that the antenna unit faces a direction corresponding to the position information. , Wireless power transmission device. The method according to claim 6,
And the sensor unit generates the posture measurement information by measuring data regarding at least one of a rotation amount, a rotation speed, a tilt, and a direction of the antenna unit. The method according to claim 6,
The control unit generates and manages location information for each wireless power receiver when there are a plurality of wireless power receivers. The method according to claim 6,
The antenna attitude control apparatus further includes a communication unit configured to communicate with the wireless power receiver. In a wireless power receiving apparatus,
An antenna unit for receiving the power transmitted wirelessly from the wireless power transmitter;
An antenna attitude control apparatus for controlling the power transmission efficiency by controlling the attitude of the antenna unit,
The antenna attitude control device,
A sensor unit for measuring the posture of the antenna unit and generating posture measurement information;
A controller configured to generate a posture control signal for controlling the posture of the antenna unit based on the generated posture measurement information;
A driver configured to receive the attitude control signal from the controller and adjust the attitude of the antenna;
Wireless power receiving apparatus comprising a. The method of claim 11,
The antenna attitude control apparatus further includes a communication unit for performing communication with the wireless power transmitter,
The control unit transmits location information on the wireless power transmitter to the wireless power transmitter by using the communication unit.
Wireless power receiving device. The method of claim 11,
The controller generates position information on the wireless power transmitter based on a change in power transmission amount according to a change in attitude of the antenna unit, and generates the attitude control signal so that the antenna unit faces a direction corresponding to the position information. ,
Wireless power receiving device. In a wireless power transmission system,
Wireless power transmitter for transmitting power wirelessly through a power transmission antenna and
At least one wireless power receiver for receiving the transmitted power via a power receiving antenna;
The wireless power transmission apparatus includes a transmission antenna attitude control apparatus for controlling the attitude of the transmission antenna,
The transmission antenna attitude control device,
A sensor unit measuring posture of the power transmission antenna and generating posture measurement information;
A controller configured to generate an attitude control signal for controlling the attitude of the power transmission antenna based on the generated attitude measurement information;
Receiving the attitude control signal from the control unit includes a driving unit for adjusting the attitude of the power transmission antenna,
The control unit generates position information of the power receiving antenna based on a change in power transmission amount according to a change in attitude of the power transmitting antenna, and generates an attitude control signal for the power transmitting antenna based on the position information of the power receiving antenna.
Wireless power transfer system. 15. The method of claim 14,
The wireless power receiver further includes a power receiving antenna attitude control device for controlling the attitude of the power receiving antenna,
The receiving antenna attitude control device,
A power receiving side sensor unit configured to measure a posture of the power receiving antenna and generate posture measurement information;
A power receiving side controller configured to generate an attitude control signal for controlling the attitude of the power receiving antenna based on the generated attitude measurement information;
And a power receiving side driver configured to receive the attitude control signal from the power receiving side controller and adjust the attitude of the power receiving antenna.
The power receiving side controller generates position information of the power transmitting antenna based on a change in power transmission amount according to a change in attitude of the power receiving antenna, and generates an attitude control signal for the power receiving antenna based on the position information of the power transmitting antenna. ,
Wireless power transfer system. The method of claim 15,
The wireless power receiver further includes a communication unit for transmitting the position information of the generated power transmission antenna to the wireless power transmitter,
In the transmission antenna attitude control apparatus, the control unit generates position information of the power receiving antenna by reflecting the position information of the transmitted power transmission antenna, and generates an attitude control signal for the power transmission antenna based on the position information of the power receiving antenna. Produced,
Wireless power transfer system. 15. The method of claim 14,
The control unit generates the posture control signal so that the center axis of the power transmission antenna is toward the center direction of the power reception antenna. 18. The method according to any one of claims 14 to 17,
In the wireless power transmitter, the control unit allocates an identification ID for each of the one or more wireless power receivers, and matches and stores the identification ID and position information of each power receiving antenna.
Wireless power transfer system. In the wireless power transmission method in a wireless power transmission apparatus,
Detecting a wireless power receiver;
Measuring a change in the amount of power transmitted to the wireless power receiver by changing a posture of a transmission antenna;
Generating location information of the wireless power receiver based on the measured change in power transmission amount;
Generating a posture control signal by the controller so that the power transmission antenna faces a direction corresponding to the position information;
A driver adjusting the attitude of the power transmission antenna in response to the attitude control signal; and
The power transmission antenna receiving power from the wireless power receiver
Wireless power transmission method comprising a. The method of claim 19,
Generating the location information,
Receiving location information on the power transmission antenna from the wireless power receiver;
Generating location information of the wireless power receiver by reflecting location information of the received power transmitting antenna;
The wireless power transmission method further comprising. The method of claim 19,
Generating the location information,
Generating one or more location information for each wireless power receiver when the wireless power receiver is one or more; and
Storing the generated one or more location information by matching the identification ID assigned to each wireless power receiver;
The wireless power transmission method further comprising. In the wireless power transmission method in a wireless power receiver,
Detecting the wireless power transmitter;
Changing a posture of a power receiving antenna and measuring a change in power transmission amount from the wireless power transmitter;
Generating location information on a power transmission antenna of the wireless power transmitter based on the measured change in power transmission amount;
Generating a posture control signal by the controller so that the power receiving antenna faces a direction corresponding to the position information;
Adjusting a posture of the power receiving antenna by the driving unit according to the posture control signal;
The power receiving antenna receiving power from the wireless power transmitter
Wireless power transmission method comprising a. 23. The method of claim 22,
After generating the location information,
The wireless power transmission method further comprises the step of transmitting the generated position information to the wireless power transmission apparatus.

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