KR20210063255A - Apparatus, method and system for magnetic resonance type wireless power charge control based on machine learning - Google Patents

Abstract

The present invention relates to a magnetic resonance type wireless power charge control apparatus based on machine learning, and a method and a system thereof and, more specifically, to a magnetic resonance type wireless power charge control apparatus based on machine learning which performs control to implement an optimal power transmission state on the basis of machine learning while using feedback information provided intermittently, and a method and a system thereof. According to the present invention, the magnetic resonance type wireless power charge control apparatus comprises: a wireless power transmission unit transmitting wireless power; a wireless power reception unit receiving the wireless power transmitted from the wireless power transmission unit; and a controller controlling wireless power transmission between the wireless power transmit and receive unit and the wireless power reception unit. The control unit receives one or more pieces of control data through wired or wireless communications and processes the received data by using a neural network circuit, thereby controlling the wireless power transmission.

Description

Apparatus, method and system for magnetic resonance type wireless power charge control based on machine learning

The present invention relates to an apparatus, method and system for controlling wireless charging power, and more particularly, a self-resonant type controllable to implement an optimal power transmission state while using feedback information provided intermittently based on machine learning. It relates to a wireless charging power control device, method and system.

Recently, with the spread of various wireless terminals such as smartphones, the scope of application of wireless power charging technology is expanding.

Furthermore, with the spread of various small electronic devices, the convenience of charging is becoming more important. In particular, the inconvenience of wired charging is becoming a major issue due to the miniaturization of devices and the increase in the number of charging times, and a wide variety of products are embracing wireless power transmission technology to match the image of high-tech devices.

More specifically, the mid-range wireless power transmitter for a mobile device uses the power control technology as shown in FIG. 1, and transmits information through wireless communication such as Bluetooth Low Energy (BLE).

In this case, as shown in FIG. 1 , in the related art, a method such as proportional integral derivative (PID) control is used to change the gains of the proportional term, the integral term, and the derivative term based on the output value and the comparison value. to control the power.

However, in the case of the wired feedback control method, information can be continuously transmitted, but in the case of the wireless feedback control method, a connection interval of 100 ms to 250 ms occurs after information transmission until the next information transmission, which results in continuous status monitoring. this becomes difficult

Accordingly, in the related art, voltage stabilization may be slow when the wireless feedback control method is used, and when the gain is increased for fast stabilization, there may be a problem of oscillation in the circuit.

Republic of Korea Patent Publication No. 10-2018-0117956 (2018.10.30)

The present invention has been devised to solve the problems of the prior art as described above, and effectively improves the voltage stabilization delay and circuit oscillation problems that may appear in wireless power control through wireless communication, and is provided intermittently. An object of the present invention is to provide a wireless charging power control apparatus, method, and system capable of implementing an optimal power transmission state and improving power transmission efficiency while using feedback information.

In addition, detailed objects of the present invention will be clearly understood and understood by experts or researchers in this technical field through specific contents described below.

A wireless charging power control system according to an embodiment of the present invention includes a wireless power transmitter for transmitting wireless power; a wireless power receiver configured to receive wireless power transmitted from the wireless power transmitter; and a controller for controlling wireless power transmission between the wireless power transmitter and the wireless power receiver, wherein the controller receives one or more control data through wired or wireless communication, and processes it using a neural network circuit to transmit power wirelessly characterized in that it controls.

At this time, at least one of the control data is provided intermittently through wired or wireless communication, and the control unit inputs the control data to the neural network circuit to calculate output data used for controlling the wireless power transmission. can

Here, the control data input to the neural network circuit may include one or more transmitter data transmitted from the wireless power transmitter and one or more receiver data transmitted from the wireless power receiver.

Furthermore, one or more receiver data transmitted from the wireless power receiver may be provided intermittently through wireless communication.

In addition, the transmitter data may include at least one of a voltage of a power supply circuit input terminal of the wireless power transmitter, a voltage of a transmission coil, and an average input current of the power supply circuit input terminal.

In addition, the receiver data may include one or more of a voltage of an output terminal of the rectifier circuit of the wireless power receiver and a charging current supplied to the battery.

In addition, the control data input to the neural network circuit may include at least one of a power transmission efficiency and a coupling coefficient k between the wireless power transmitter and the wireless power receiver.

In addition, the output data used to control the wireless power transmission may include output power of a power supply circuit of the wireless power transmitter.

In addition, the neural network circuit may be a convolutional neural network circuit (CNN) learned using one or more control data provided intermittently.

In addition, in the wireless charging power control method according to another embodiment of the present invention, in the wireless charging power control method for controlling wireless power transmission between the wireless power transmitter and the wireless power receiver, the controller controls the wireless power through wired or wireless communication. a control data step of receiving one or more control data from a transmitter or the wireless power receiver; and a wireless power transmission control step in which the controller processes the control data using a neural network circuit to control wireless power transmission.

Accordingly, in the wireless charging power control apparatus, method and system according to an embodiment of the present invention, the voltage and power of the receiving end are controlled based on machine learning, and voltage stabilization that can appear in wireless power control through wireless communication is Delay and circuit oscillation problems can be avoided.

In addition, in the wireless charging power control apparatus, method and system according to an embodiment of the present invention, it is possible to increase the wireless power transfer control speed, overshoot (overshoot) that may occur in the wireless power control through the conventional wireless communication and It can prevent rashes.

In addition, the wireless charging power control apparatus, method and system according to an embodiment of the present invention enables immediate control even in an environment that cannot provide continuous information such as communication such as low-power Bluetooth (BLE).

In addition, in an apparatus, method, and system for controlling wireless charging power according to an embodiment of the present invention, wireless power transmission is performed through fast power control even in an environment in which the movement of mobile devices is frequent, such as mid-range wireless power transmission based on a high control speed It is possible to reduce the burden on the transceiver by increasing the efficiency of the transmission and preventing overshoot and oscillation.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as a part of the detailed description to aid understanding of the present invention, provide embodiments of the present invention, and together with the detailed description, explain the technical spirit of the present invention.
1 is a diagram illustrating the configuration and operation of an apparatus for controlling proportional integral and derivative according to the related art.
2 is a block diagram illustrating the configuration of a wireless charging power control system according to an embodiment of the present invention.
3 is a diagram illustrating the structure and operation of a wireless charging power control apparatus according to an embodiment of the present invention.
4 is a diagram illustrating a neural network circuit in a wireless charging power control apparatus according to an embodiment of the present invention.
5 is a flowchart illustrating a wireless charging power control method according to an embodiment of the present invention.

The present invention may apply various transformations and may have various embodiments. Hereinafter, specific embodiments will be described in detail based on the accompanying drawings.

The following examples are provided to aid in a comprehensive understanding of the methods, apparatus and/or systems described herein. However, this is only an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, when it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout the present specification. The terms used in the detailed description are only for describing the embodiments of the present invention, and should not be limiting. Unless explicitly used otherwise, expressions in the singular form include the meaning of the plural form. In the present description, expressions such as "comprising" or "feature" are intended to refer to certain features, numbers, steps, actions, elements, some or combination thereof, and one or more It should not be construed to exclude the presence or possibility of other features, numbers, steps, actions, elements, any part or combination thereof.

In addition, terms such as first and second may be used to describe various components, but the components are not limited by the terms, and the terms are used to distinguish one component from other components. Is only used.

Hereinafter, exemplary embodiments of an apparatus, method and system for controlling wireless charging power according to an embodiment of the present invention will be described with reference to the accompanying drawings.

First, FIG. 2 illustrates the configuration of the wireless charging power control system 100 according to an embodiment of the present invention.

As can be seen in FIG. 2 , the wireless charging power control system 100 according to an embodiment of the present invention includes a wireless power transmitter 110 that transmits wireless power, and a wireless power transmitted from the wireless power transmitter 110 . It may be configured to include a wireless power receiver 120 that receives power, and a controller 130 that controls wireless power transmission between the wireless power transmitter 110 and the wireless power receiver 120 .

At this time, in the present invention, the control unit 130 receives one or more control data through wired or wireless communication, and processes it using a neural network circuit to generate wireless power between the wireless power transmitter 110 and the wireless power receiver 120 . control the transmission.

Furthermore, in the wireless charging power control system 100 according to an embodiment of the present invention, one or more of the control data may be provided intermittently through wired or wireless communication, wherein the control unit 130 is The control data may be input to the neural network circuit to calculate output data used to control the wireless power transmission, and wireless power transmission between the wireless power transmitter 110 and the wireless power receiver 120 may be controlled.

Accordingly, in the wireless charging power control system 100 according to an embodiment of the present invention, it effectively improves the voltage stabilization delay and circuit oscillation problems that may appear in wireless power control through wireless communication, and intermittently ) while using the provided feedback information, it is possible to implement an optimal power transmission state and improve power transmission efficiency.

More specifically, as can be seen in FIG. 2 , in the wireless charging power control system 100 according to an embodiment of the present invention, the wireless power transmitter 110 includes a power supply circuit 111 and a transmission coil 112 . ), and the wireless power receiver 120 may include a receiving coil 121 and a rectifying circuit 122 .

In addition, FIG. 3 illustrates the structure and operation of the wireless power transmitter 110 and the wireless power receiver 120 in the wireless charging power control system 100 according to an embodiment of the present invention.

Hereinafter, with reference to FIGS. 2 and 3 , the wireless charging power control system 100 according to an embodiment of the present invention is divided for each component and examined in more detail.

First, the wireless power transmitter 110 transmits wireless power to the wireless power receiver 120 .

At this time, as can be seen in FIGS. 2 and 3 , the wireless power transmitter 110 may include a power supply circuit 111 and a transmission coil 112 .

In this case, the power supply circuit 111 provides power to be wirelessly transmitted to the transmission coil 112 .

Here, the power supply circuit 111 may include a power amplifier or an inverter, but the present invention is not necessarily limited thereto.

In addition, the transmitting coil 112 wirelessly transmits the power received from the power supply circuit 111 to transmit it to the wireless power receiver 120 .

In addition, as can be seen in FIGS. 2 and 3 , the wireless power receiver 120 may include a receiving coil 121 and a rectifying circuit 122 .

At this time, the receiving coil 121 receives the wireless power transmitted from the wireless power transmitter 110 and transmits it to the rectifier circuit 122 .

Accordingly, the rectifying circuit 122 rectifies the power received from the receiving coil 121 and provides it for charging the battery.

In addition, in FIG. 2 , the controller 130 receives one or more control data from the wireless power transmitter 110 and the wireless power receiver 120 through wired or wireless communication, and processes it using a neural network circuit to generate wireless power. control the transmission.

In this case, the control data input to the neural network circuit may include one or more transmitter data transmitted from the wireless power transmitter 110 and one or more receiver data transmitted from the wireless power receiver 120 .

More specifically, as can be seen in FIG. 3 , the transmitter data includes a voltage (V _{inverter ) of the input terminal of the power supply circuit 111 of the wireless power transmitter 110, and a voltage (V TX_coil} ) of the transmitting coil 112. _{, at least one of the average input current I TX_aver of the} input terminal of the power supply circuit 111 may be included.

In addition, the receiver data may include at least one _{of a voltage V Rect} of an output terminal of the rectifier circuit 122 of the wireless power receiver 120 and a charging current I _{Charge supplied to the battery.}

In addition, the control data input to the neural network circuit may include at least one of a power transmission efficiency and a coupling coefficient k between the wireless power transmitter 110 and the wireless power receiver 120 .

In this case, the power transmission efficiency may be calculated using an input voltage, a current, an output voltage, and a current.

Furthermore, in the wireless charging power control system 100 according to an embodiment of the present invention, one or more receiver data transmitted from the wireless power receiver 120 may be provided intermittently through wireless communication.

More specifically, the wireless power receiver 120 may transmit the one or more receiver data to the controller 130 using wireless communication, such as BLE (Bluetooth Low Energy), wherein the wireless power receiver 120 is a predetermined The receiver data may be transmitted intermittently with a time interval.

In addition, the wireless power transmitter 110 may be connected to the controller 130 by wire or may be manufactured integrally, and accordingly, the wireless power transmitter 110 transmits the transmitter data to the controller 130 via a wire. However, the present invention is not necessarily limited thereto, and the wireless power transmitter 110 may also transmit transmitter data through wireless communication.

Accordingly, the control unit 130 inputs the control data to the neural network circuit to calculate output data used to control the wireless power transmission.

In this case, the output data used to control the wireless power transmission may include output power of the power supply circuit 111 of the wireless power transmitter 110 .

Accordingly, the controller 130 controls the output power of the power supply circuit 111 in the wireless power transmitter 110 while performing wireless power transmission between the wireless power transmitter 110 and the wireless power receiver 120 . can be controlled

In this case, the neural network circuit may be a convolutional neural network circuit (CNN) learned using one or more control data provided intermittently, but the present invention is not necessarily limited thereto.

Accordingly, in the apparatus, method and system 100 for controlling wireless charging power according to an embodiment of the present invention, the voltage and power of the wireless power receiver 120 are controlled based on a machine-learning neural network circuit. be able to do

More specifically, FIG. 4 exemplifies a convolutional neural network (CNN) configured based on the variable values in the wireless charging power control system 100 according to an embodiment of the present invention in FIG. 3 .

In addition, FIG. 3 illustrates a block diagram in which variable values used in the neural network circuit of the control unit 130 are displayed together with the structure of the wireless charging power control apparatus according to an embodiment of the present invention.

At this time, as can be seen in FIG. 4 , the input information input to the convolutional neural network (CNN) is the input terminal voltage (V _inverter ) of the power supply circuit 111 such as an inverter or a power amplifier in the wireless power transmitter 110 . and the peak-to-peak voltage (V _{TX_coil ) of the transmitting coil 112 and the average input current (I TX_aver} ) of the input terminal of the power supply circuit 111 may be included, and the wireless power receiver 120 ), the output terminal voltage (V _Rect ) of the rectifier circuit 122 and the charging current (I _Charge ) supplied to the battery may be included, and power transmission between the wireless power transmitter 110 and the wireless power receiver 120 . Efficiency and coupling coefficient (k) may be included. In this case, the power transmission efficiency (Efficiency) may be calculated using an input voltage, a current, an output voltage, and a current.

In addition, the neural network circuit may be configured as a convolutional neural network circuit (CNN). At this time, based on the above input values, the neural network circuit is implemented in a structure having a maximum of N layers from a minimum of two layers. It learns the power transmission state. In this case, the neural network circuit may be learned using one or more control data provided intermittently.

Accordingly, in the wireless charging power control system 100 according to an embodiment of the present invention, the current state is analyzed and controlled based on the learned data, and the optimal power transfer state is tracked to be used for control of wireless power transfer. Output data can be provided.

In this case, in FIG. 4 , the output of the neural network circuit may indicate the output power intensity of the power supply circuit 111 such as an inverter or a power amplifier.

Looking at the implementation of the neural network circuit in more detail, first, input data is prepared and configured for learning of the convolutional neural network circuit (CNN).

At this time, a solution value that can create an optimized power transmission state in a specific situation is provided as training data.

Next, learning data with optimal efficiency is learned through a convolutional neural network (CNN), which is a machine learning algorithm.

Accordingly, the wireless charging power control system 100 according to an embodiment of the present invention uses a convolutional neural network circuit implemented through learning data to follow a power transmission state with optimal efficiency according to various operating conditions. will do

In particular, in the wireless charging power control system 100 according to an embodiment of the present invention, in the prior art, unlike tracking the optimal transmission state while receiving continuous feedback based on the current state of the wireless charging power control system 100, Based on the learned data, it is possible to follow the optimal power transmission state while using only data provided intermittently, which is not continuous.

In addition, in the wireless charging power control system 100 according to an embodiment of the present invention, the wireless power transmission control speed can be increased, and overshoot and oscillation that may occur in the conventional control method can be effectively prevented. .

Furthermore, in the wireless charging power control system 100 according to an embodiment of the present invention, voltage stabilization is possible by immediately controlling even in an operating environment where continuous information is not provided using wireless communication such as low power Bluetooth (BLE). do.

Furthermore, in the wireless charging power control system 100 according to an embodiment of the present invention, wireless power transmission efficiency is improved even in an environment where mobile devices are frequently moved, such as mid-range wireless power transmission, through fast power control based on a high control speed. It is possible to improve stability in the wireless power transmitter 110 and the wireless power receiver 120 by increasing and preventing overshoot and oscillation.

In addition, FIG. 5 shows a flowchart illustrating a wireless charging power control method according to an embodiment of the present invention.

As can be seen in FIG. 5 , the wireless charging power control method according to an embodiment of the present invention is a wireless charging power control method for controlling wireless power transmission between the wireless power transmitter 110 and the wireless power receiver 120 . In the control data step (S110) in which the controller 130 receives one or more control data from the wireless power transmitter 110 or the wireless power receiver 120 through wired or wireless communication, and the controller 130 performs the and a wireless power transmission control step (S120) of controlling wireless power transmission by processing control data using a neural network circuit.

The wireless charging power control method according to an embodiment of the present invention has been described in detail in the wireless charging power control apparatus and system 100 according to an embodiment of the present invention with reference to FIGS. 1 to 4 above, below in detail The description will be omitted and a brief review will be made focusing on the core configuration.

First, in the control data step S110 , the controller 130 receives one or more control data from the wireless power transmitter 110 or the wireless power receiver 120 through wired or wireless communication.

In addition, in the wireless power transmission control step ( S120 ), the controller 130 processes the control data using a neural network circuit to control wireless power transmission.

At this time, at least one of the control data is provided intermittently through wired or wireless communication, and the control unit 130 inputs the control data to the neural network circuit to output data used to control the wireless power transmission. can be calculated.

Here, the control data input to the neural network circuit may include one or more transmitter data transmitted from the wireless power transmitter 110 and one or more receiver data transmitted from the wireless power receiver 120 .

Furthermore, one or more receiver data transmitted from the wireless power receiver 120 may be provided intermittently through wireless communication.

In addition, the transmitter data may include one or more of the voltage of the input terminal of the power supply circuit 111 of the wireless power transmitter 110, the voltage of the transmission coil 112, and the average input current of the input terminal of the power supply circuit 111. can

In addition, the receiver data may include one or more of a voltage of the output terminal of the rectifier circuit 122 of the wireless power receiver 120 and a charging current supplied to the battery.

In addition, the control data input to the neural network circuit may include at least one of a power transmission efficiency and a coupling coefficient k between the wireless power transmitter 110 and the wireless power receiver 120 .

In addition, the output data used to control the wireless power transmission may include output power of the power supply circuit 111 of the wireless power transmitter 110 .

In addition, the neural network circuit may be a convolutional neural network circuit (CNN) learned using one or more control data provided intermittently.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments described in the present invention are not intended to limit the technical idea of the present invention, but to explain, and are not limited to these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: wireless charging power control system
110: wireless power transmitter
111: power supply circuit
112: transmitting coil
120: wireless power receiver
121: receiving coil
122: rectifier circuit
130: control unit

Claims (10)

a wireless power transmitter for transmitting wireless power;
a wireless power receiver configured to receive wireless power transmitted from the wireless power transmitter; and
a control unit for controlling wireless power transmission between the wireless power transmitter and the wireless power receiver;
The control unit receives one or more control data through wired or wireless communication, and processes it using a neural network circuit to control wireless power transmission. The method of claim 1,
one or more of the control data is provided intermittently through wired or wireless communication,
The control unit inputs the control data to the neural network circuit, and the wireless charging power control system, characterized in that calculating the output data used to control the wireless power transmission. The method of claim 2,
Control data input to the neural network circuit,
One or more transmitter data transmitted from the wireless power transmitter;
Wireless charging power control system, characterized in that it comprises one or more receiver data transmitted from the wireless power receiver. The method of claim 3,
One or more receiver data transmitted from the wireless power receiver is a wireless charging power control system, characterized in that provided intermittently (intermittently) through wireless communication. The method of claim 3,
The transmitter data wireless charging power control system, characterized in that it comprises one or more of the voltage of the input terminal of the power supply circuit of the wireless power transmitter, the voltage of the transmission coil, and the average input current of the input terminal of the power supply circuit. The method of claim 3,
The receiver data wireless charging power control system, characterized in that it comprises one or more of a voltage of the rectifier circuit output terminal of the wireless power receiver and a charging current supplied to the battery. The method of claim 3,
In the control data input to the neural network circuit,
A wireless charging power control system, characterized in that at least one of a power transmission efficiency and a coupling coefficient (k) between the wireless power transmitter and the wireless power receiver. The method of claim 2,
The output data used to control the wireless power transmission is,
Wireless charging power control system comprising the output power of the power supply circuit of the wireless power transmitter. The method of claim 1,
The neural network circuit is a wireless charging power control system, characterized in that it is a convolutional neural network circuit (CNN) learned using one or more control data provided intermittently. In the wireless charging power control method for controlling the wireless power transmission between the wireless power transmitter and the wireless power receiver,
a control data step in which a control unit receives one or more control data from the wireless power transmitter or the wireless power receiver through wired or wireless communication; and
a wireless power transmission control step in which the controller processes the control data using a neural network circuit to control wireless power transmission;
Wireless charging power control method comprising a.

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