A wireless charging transmitting end control method and device, equipment and medium

Abstract

The application provides a wireless charging transmitting end control method and device, equipment and medium, relates to the technical field of wireless charging, and the method comprises the following steps: obtaining a target given value of a transmitting coil current; applying a voltage disturbance to an output voltage of the power factor correction circuit, detecting the transmitting coil current, and obtaining a deviation between the transmitting coil current and the target given value; determining the direction of the next voltage disturbance according to the change of the deviation compared with before the voltage disturbance is applied, until the deviation between the transmitting coil current and the target given value is less than a preset threshold, wherein when the deviation decreases, the direction of the next voltage disturbance is the same as the direction of the voltage disturbance, and when the deviation does not decrease, the direction of the next voltage disturbance is opposite to the direction of the voltage disturbance, so as to adaptively control the output voltage of the power factor correction circuit.

Description

Technical Field

[0001] This application relates to the field of wireless charging technology, and more specifically, to a wireless charging transmitter control method, apparatus, device, and medium. Background Technology

[0002] Wireless charging technology transmits electrical energy through magnetic field coupling between transmitting and receiving coils, allowing devices to recharge without plugging and unplugging the charging interface. It has already been applied in robotics, electric vehicles, and consumer electronics. In robotic applications, after the robot returns to its charging location, the transmitter couples with the receiver mounted on the robot to replenish its power.

[0003] In related technologies, the transmitting end regulates the transmitting coil current by controlling the DC bus voltage output by the power factor correction circuit. The controller, based on the target current value, calculates the required DC bus voltage using a mathematical formula and then controls the power factor correction circuit to output the calculated DC bus voltage.

[0004] In actual circuits, components have manufacturing tolerances, and parameters such as inductance and capacitance will drift with temperature and aging. Changes in the relative position between the transmitter and receiver during charging will also cause changes in mutual inductance. When the hardware parameters in actual operation are inconsistent with the hardware parameters used to determine the mathematical relationship, the DC bus voltage obtained by reverse calculation will not match the actual required DC bus voltage, and the transmitting coil current will deviate from the target current value, resulting in decreased control accuracy and reduced charging efficiency. Summary of the Invention

[0005] The problem addressed in this application is how to adaptively control the output voltage of a power factor correction circuit.

[0006] To address the aforementioned issues, this application provides a wireless charging transmitter control method, apparatus, device, and medium.

[0007] In a first aspect, this application provides a wireless charging transmitter control method, including: Obtain the target setpoint value for the transmitting coil current; A voltage perturbation is applied to the output voltage of the power factor correction circuit, the transmitting coil current is detected, and the deviation between the transmitting coil current and the target setpoint is obtained. Based on the change in deviation compared to before the voltage disturbance was applied, the direction of the next voltage disturbance is determined until the deviation between the transmitting coil current and the target given value is less than a preset threshold. When the deviation decreases, the direction of the next voltage disturbance is the same as the direction of the voltage disturbance. When the deviation does not decrease, the direction of the next voltage disturbance is opposite to the direction of the voltage disturbance.

[0008] Optionally, applying a voltage disturbance to the output voltage of the power factor correction circuit includes: Based on the current output voltage of the power factor correction circuit, a preset positive or negative voltage disturbance step size is superimposed.

[0009] Optionally, determining the direction of the next voltage disturbance based on the change in the deviation compared to before the voltage disturbance was applied includes: The preset voltage perturbation step size is adjusted according to the magnitude of the deviation, wherein the preset voltage perturbation step size and the magnitude of the deviation are positively correlated.

[0010] Optionally, the detection of the transmitting coil current includes: The system receives signals transmitted by a wireless charging receiver via wireless communication and determines the current of the transmitting coil based on the signals, wherein the signals include charging current and / or receiving power.

[0011] Optionally, before applying a voltage perturbation to the output voltage of the power factor correction circuit, the method further includes: Detect the transmitting coil current to obtain the pre-disturbance deviation between the transmitting coil current and the target setpoint; The deviation before the disturbance is used as a benchmark for comparison with the change in the deviation before the voltage disturbance was applied.

[0012] Optionally, the control method for the wireless charging transmitter further includes: When the deviation is less than the preset threshold, the voltage disturbance is paused, and the output voltage of the power factor correction circuit remains unchanged. The deviation is obtained by detecting the transmitting coil current during the period when the applied voltage disturbance is paused; When the deviation is greater than or equal to the preset threshold, the voltage disturbance is resumed.

[0013] Optionally, applying a voltage perturbation to the output voltage of the power factor correction circuit and detecting the transmitting coil current includes: After applying a voltage disturbance to the output voltage and waiting for a preset time, the amplitude of the transmitting coil current is detected.

[0014] Secondly, this application provides a control device for a wireless charging transmitter, comprising: The acquisition module is used to acquire the target given value of the transmitting coil current; The deviation determination module is used to apply a voltage perturbation to the output voltage of the power factor correction circuit, detect the transmitting coil current, and obtain the deviation between the transmitting coil current and the target setpoint. The disturbance determination module is used to determine the direction of the next voltage disturbance based on the change of the deviation compared to before the voltage disturbance was applied, until the deviation between the transmitting coil current and the target given value is less than a preset threshold. When the deviation decreases, the direction of the next voltage disturbance is the same as the direction of the voltage disturbance. When the deviation does not decrease, the direction of the next voltage disturbance is opposite to the direction of the voltage disturbance.

[0015] Thirdly, this application provides an electronic device, including a memory and a processor; The memory is used to store computer programs; The processor is configured to implement the wireless charging transmitter control method as described in the first aspect when executing the computer program.

[0016] Fourthly, this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the wireless charging transmitter control method as described in the first aspect.

[0017] The beneficial effects of the wireless charging transmitter control method of this application are: By obtaining the target setpoint value of the transmitting coil current, the output voltage of the power factor correction circuit is repeatedly subjected to voltage perturbations, the transmitting coil current is detected, and the deviation is obtained. The direction of the next voltage perturbation is determined based on the change in deviation compared to before the voltage perturbation, gradually converging the output voltage of the power factor correction circuit to a voltage that makes the transmitting coil current approach the target setpoint value. Changes in the hardware parameters of the power factor correction circuit, high-frequency inverter circuit, transmitting coil, and mutual inductance are treated as changes in the characteristics of the controlled object. Online probing is performed by applying voltage perturbations and detecting the transmitting coil current, automatically adapting to changes in hardware parameters. Even with errors and changes in hardware parameters, the output voltage of the power factor correction circuit can still adaptively adjust, stabilizing the transmitting coil current near the target setpoint. This adaptive control of the power factor correction circuit's output voltage improves the control robustness and charging efficiency of the wireless charging system. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating the wireless charging transmitter control method according to an embodiment of this application. Figure 2 This is an example diagram of an electronic device according to an embodiment of this application. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this application more apparent and understandable, specific embodiments of this application are described in detail below with reference to the accompanying drawings. Although some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the accompanying drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0020] It should be understood that the steps described in the method embodiments of this application may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this application is not limited in this respect.

[0021] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the description below. It should be noted that the concepts of "first," "second," etc., mentioned in this application are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0022] It should be noted that the terms "one" and "more" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] The names of messages or information exchanged between multiple devices in the embodiments of this application are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0024] like Figure 1 As shown in the figure, an embodiment of this application provides a wireless charging transmitter control method, including: Step S100: Obtain the target given value of the transmitting coil current.

[0025] The transmitting coil current represents the current flowing through the transmitting coil. During wireless charging system operation, the magnitude of the transmitting coil current directly affects the transmitting power. Excessive transmitting coil current causes significant power loss and heat generation, while insufficient current fails to meet charging power requirements. The target setpoint represents the desired current value maintained by the transmitting coil, which can be determined based on the target charging parameters of the wireless charging system. Obtaining the target setpoint of the transmitting coil current serves as a benchmark for assessing whether the transmitting coil current meets charging requirements.

[0026] Step S200: Apply a voltage disturbance to the output voltage of the power factor correction circuit, detect the transmitting coil current, and obtain the deviation between the transmitting coil current and the target given value.

[0027] The output voltage of the power factor correction circuit represents the DC bus voltage output by the circuit. Voltage perturbation represents the voltage regulation amount superimposed on the current output voltage of the power factor correction circuit. After applying a voltage perturbation to the output voltage of the power factor correction circuit, the output voltage changes. This changed output voltage is then processed by the high-frequency inverter circuit and the transmitting coil, causing a corresponding change in the transmitting coil current. The transmitting coil current after the applied voltage perturbation is detected, and the deviation between the transmitting coil current and the target setpoint is obtained based on the transmitting coil current and the target setpoint. The deviation indicates the degree to which the transmitting coil current deviates from the target setpoint.

[0028] Step S300: Based on the change in the deviation compared to before the voltage disturbance was applied, determine the direction of the next voltage disturbance until the deviation between the transmitting coil current and the target given value is less than a preset threshold. When the deviation decreases, the direction of the next voltage disturbance is the same as the direction of the voltage disturbance. When the deviation does not decrease, the direction of the next voltage disturbance is opposite to the direction of the voltage disturbance.

[0029] Before applying a voltage perturbation, there is a deviation between the transmitting coil current and the target setpoint. The deviation after applying the voltage perturbation is compared to the deviation before applying the perturbation to obtain the change in deviation compared to before the perturbation. When the deviation decreases, it indicates that the transmitting coil current is moving closer to the target setpoint, the direction of this voltage perturbation is valid, and the direction of the next voltage perturbation is the same as this one. When the deviation does not decrease, it indicates that the transmitting coil current is moving away from the target setpoint, the direction of this voltage perturbation is invalid, and the direction of the next voltage perturbation is opposite to this one. The process of applying a voltage perturbation, detecting the transmitting coil current, and determining the direction of the next voltage perturbation is repeated until the deviation between the transmitting coil current and the target setpoint is less than a preset threshold. The preset threshold represents the allowable deviation range between the transmitting coil current and the target setpoint. When the deviation is less than the preset threshold, the transmitting coil current stabilizes near the target setpoint, and the output voltage of the power factor correction circuit converges to a voltage that makes the transmitting coil current approach the target setpoint.

[0030] In this embodiment, by obtaining the target setpoint value of the transmitting coil current, voltage perturbations are repeatedly applied to the output voltage of the power factor correction circuit, the transmitting coil current is detected, and the deviation is obtained. The direction of the next voltage perturbation is determined based on the change in deviation compared to before the voltage perturbation, so that the output voltage of the power factor correction circuit gradually converges to a voltage that makes the transmitting coil current approach the target setpoint value. Changes in hardware parameters such as the power factor correction circuit, high-frequency inverter circuit, transmitting coil, and mutual inductance are uniformly regarded as changes in the characteristics of the controlled object. Online probing is performed by applying voltage perturbations and detecting the transmitting coil current to automatically adapt to changes in hardware parameters. Even if there are errors and changes in hardware parameters, the output voltage of the power factor correction circuit can still adaptively adjust to keep the transmitting coil current stable near the target setpoint value, thereby improving the control robustness and charging efficiency of the wireless charging system.

[0031] Optionally, applying a voltage disturbance to the output voltage of the power factor correction circuit includes: Based on the current output voltage of the power factor correction circuit, a preset positive or negative voltage disturbance step size is superimposed.

[0032] In one embodiment, the preset voltage perturbation step size represents the amplitude of each voltage perturbation. A forward voltage perturbation represents increasing the current output voltage by one preset voltage perturbation step size, while a reverse voltage perturbation represents decreasing the current output voltage by one preset voltage perturbation step size. After applying a forward voltage perturbation, the output voltage of the power factor correction circuit increases; after applying a reverse voltage perturbation, the output voltage of the power factor correction circuit decreases. The changed output voltage, after passing through the high-frequency inverter circuit and the transmitting coil, causes the transmitting coil current to increase or decrease accordingly. A larger preset voltage perturbation step size results in a greater change in the transmitting coil current caused by a single voltage perturbation, while a smaller preset voltage perturbation step size results in a smaller change in the transmitting coil current caused by a single voltage perturbation. The preset voltage perturbation step size can be preset by the controller.

[0033] Optionally, determining the direction of the next voltage disturbance based on the change in the deviation compared to before the voltage disturbance was applied includes: The preset voltage perturbation step size is adjusted according to the magnitude of the deviation, wherein the preset voltage perturbation step size and the magnitude of the deviation are positively correlated.

[0034] In one embodiment, when determining the direction of the next voltage perturbation, the preset voltage perturbation step size is adjusted according to the magnitude of the deviation between the transmitting coil current and the target setpoint. The preset voltage perturbation step size and the magnitude of the deviation are positively correlated; that is, the larger the deviation, the larger the preset voltage perturbation step size, and vice versa. When the deviation is large, a larger preset voltage perturbation step size is used, causing the transmitting coil current to approach the target setpoint more quickly. When the deviation is small, a smaller preset voltage perturbation step size is used to avoid repeated fluctuations in the output voltage of the power factor correction circuit around the voltage that causes the transmitting coil current to approach the target setpoint. By adjusting the preset voltage perturbation step size according to the magnitude of the deviation, a balance is achieved between convergence speed and steady-state accuracy.

[0035] Optionally, the detection of the transmitting coil current includes: The system receives signals transmitted by a wireless charging receiver via wireless communication and determines the current of the transmitting coil based on the signals, wherein the signals include charging current and / or receiving power.

[0036] In one embodiment, the wireless charging receiver includes a receiving coil, and electrical energy is transmitted between the transmitting coil and the receiving coil via magnetic field coupling. The charging current represents the current flowing through the battery in the wireless charging receiver, and the received power represents the power received by the wireless charging receiver. The wireless charging receiver detects the charging current or received power and transmits it to the transmitting end via wireless communication. The controller receives the signal via wireless communication, determines the transmitting coil current based on the signal, and the determined transmitting coil current participates in obtaining the deviation and subsequently determining the direction of the next voltage disturbance, similar to the method of detecting the transmitting coil current using a current sensor.

[0037] During the charging phase, when the relative positions of the transmitter and the wireless charging receiver remain unchanged, an increase in the transmitter coil current leads to a corresponding increase in the energy transferred between the transmitter and receiver coils, resulting in a corresponding increase in both the charging current and the received power. The trends in charging current and received power are consistent with those of the transmitter coil current, allowing the controller to determine the transmitter coil current based on these signals. When determining the transmitter coil current using signals transmitted from the wireless charging receiver, the transmitter does not require a current sensor to detect the transmitter coil current, reducing hardware costs. The charging current and received power directly reflect the charging status of the wireless charging receiver.

[0038] Specifically, a correspondence between charging current or received power and transmitting coil current can be established in advance. For example, during the assembly or debugging phase, for different output voltages of the power factor correction circuit, the transmitting coil current and the charging current or received power fed back by the wireless charging receiver are detected and recorded to form a correspondence. During charging, the transmitting coil current is determined by looking up the table based on the signal. The correspondence is used to determine the value of the transmitting coil current, not to reverse-engineer the output voltage of the power factor correction circuit based on the target given value. The signal can include either charging current or received power, or both.

[0039] Optionally, before applying a voltage perturbation to the output voltage of the power factor correction circuit, the method further includes: Detect the transmitting coil current to obtain the pre-disturbance deviation between the transmitting coil current and the target setpoint; The deviation before the disturbance is used as a benchmark for comparison with the change in the deviation before the voltage disturbance was applied.

[0040] In one embodiment, the pre-disturbance deviation represents the absolute value of the difference between the transmitting coil current and the target setpoint before the voltage disturbance is applied. After the charging process begins, before applying the first voltage disturbance, the controller detects the transmitting coil current to obtain the pre-disturbance deviation. Using this pre-disturbance deviation as a comparison benchmark, when determining the direction of the next voltage disturbance for the first time, the deviation obtained after the first voltage disturbance is compared with the pre-disturbance deviation. Subsequently, before each voltage disturbance is applied, the controller detects the transmitting coil current, obtains the pre-disturbance deviation, and updates the comparison benchmark. The deviation obtained after the current voltage disturbance is applied is compared with the updated pre-disturbance deviation; the change in deviation reflects the effect of the current voltage disturbance. When the load changes between two cycles, the pre-disturbance deviation reflects the changed transmitting coil current; the judgment of whether the deviation increases or decreases is based on actual detection.

[0041] In another embodiment, the deviation is obtained by detecting the transmitting coil current after each voltage perturbation. The obtained deviation is maintained before the next voltage perturbation. The same detection serves as both the detection after the voltage perturbation and the detection before the next voltage perturbation. The obtained deviation is directly used as the deviation before the next voltage perturbation, eliminating the need to repeatedly detect the transmitting coil current before each voltage perturbation.

[0042] Optionally, the wireless charging transmitter control method further includes: When the deviation is less than the preset threshold, the voltage disturbance is paused, and the output voltage of the power factor correction circuit remains unchanged. The deviation is obtained by detecting the transmitting coil current during the period when the applied voltage disturbance is paused; When the deviation is greater than or equal to the preset threshold, the voltage disturbance is resumed.

[0043] In one embodiment, a preset threshold represents the allowable deviation range between the transmitting coil current and the target setpoint. This preset threshold can be pre-set according to the charging accuracy requirements of the wireless charging system. When the deviation between the transmitting coil current and the target setpoint is less than the preset threshold, it indicates that the transmitting coil current has entered a specified range near the target setpoint. At this point, the applied voltage perturbation is paused, the output voltage of the power factor correction circuit remains unchanged, and a locked state is entered to avoid steady-state oscillations caused by repeated perturbations near the voltage that would otherwise cause the transmitting coil current to approach the target setpoint. During the pause of the applied voltage perturbation, the transmitting coil current continues to be detected and the deviation is obtained. When the deviation between the transmitting coil current and the target setpoint is greater than or equal to the preset threshold, it indicates that the transmitting coil current has deviated from the specified range. The applied voltage perturbation is resumed, and the output voltage of the power factor correction circuit is readjusted.

[0044] Optionally, applying a voltage perturbation to the output voltage of the power factor correction circuit and detecting the transmitting coil current includes: After applying a voltage disturbance to the output voltage and waiting for a preset time, the amplitude of the transmitting coil current is detected.

[0045] In one embodiment, after applying a voltage perturbation to the output voltage of the power factor correction circuit, the output voltage of the power factor correction circuit and the link consisting of the high-frequency inverter circuit and the transmitting coil need to undergo a transition process before reaching a new steady state. After a preset time following the application of the voltage perturbation, the amplitude of the transmitting coil current is detected. The amplitude of the transmitting coil current detected at this time is the steady-state amplitude after the output voltage change, reflecting the transmitting coil current corresponding to the changed output voltage, thus avoiding the detection of transient current values ​​during the transition process and affecting the deviation judgment. The preset time can be preset by the controller according to the response speed of the wireless charging system.

[0046] Specifically, the preset duration can be determined based on the response time of the power factor correction circuit and the transient characteristics of the circuit containing the transmitting coil. For example, during the commissioning phase at the transmitting end, the change in the transmitting coil current after a voltage disturbance is detected, and the preset duration is determined based on the detection results, ensuring that the preset duration covers the transient process. The transmitting coil current detected after the preset duration is the current after stabilization, and the increase or decrease in deviation reflects the effect of the voltage disturbance in the stable state, avoiding directional misjudgment caused by detection during the transient process. The determination of the detection timing can also be independent of the preset duration. For example, the controller detects the change in the transmitting coil current after a voltage disturbance is applied. When the change in the transmitting coil current is less than the preset change, it is determined that the transmitting coil current has entered a stable state, and then the amplitude of the transmitting coil current is detected to obtain the deviation.

[0047] This application provides a control device for a wireless charging transmitter, comprising: The acquisition module is used to acquire the target given value of the transmitting coil current; The deviation determination module is used to apply a voltage perturbation to the output voltage of the power factor correction circuit, detect the transmitting coil current, and obtain the deviation between the transmitting coil current and the target setpoint. The disturbance determination module is used to determine the direction of the next voltage disturbance based on the change of the deviation compared to before the voltage disturbance was applied, until the deviation between the transmitting coil current and the target given value is less than a preset threshold. When the deviation decreases, the direction of the next voltage disturbance is the same as the direction of the voltage disturbance. When the deviation does not decrease, the direction of the next voltage disturbance is opposite to the direction of the voltage disturbance.

[0048] like Figure 2As shown in the embodiment of this application, an electronic device 200 includes a memory 210 and a processor 220; the memory 210 is used to store a computer program; the processor 220 is used to implement the wireless charging transmitter control method as described above when the computer program is executed.

[0049] Alternatively, an electronic device 200 includes a memory 210 and a processor 220 coupled to the memory 210; the memory 210 is configured to store a computer program; and the processor 220 is configured to perform the following operations when the computer program is executed: Obtain the target setpoint value for the transmitting coil current; A voltage perturbation is applied to the output voltage of the power factor correction circuit, the transmitting coil current is detected, and the deviation between the transmitting coil current and the target setpoint is obtained. Based on the change in deviation compared to before the voltage disturbance was applied, the direction of the next voltage disturbance is determined until the deviation between the transmitting coil current and the target given value is less than a preset threshold. When the deviation decreases, the direction of the next voltage disturbance is the same as the direction of the voltage disturbance. When the deviation does not decrease, the direction of the next voltage disturbance is opposite to the direction of the voltage disturbance.

[0050] This application provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the wireless charging transmitter control method described above.

[0051] Alternatively, a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the following operations: Obtain the target setpoint value for the transmitting coil current; A voltage perturbation is applied to the output voltage of the power factor correction circuit, the transmitting coil current is detected, and the deviation between the transmitting coil current and the target setpoint is obtained. Based on the change in deviation compared to before the voltage disturbance was applied, the direction of the next voltage disturbance is determined until the deviation between the transmitting coil current and the target given value is less than a preset threshold. When the deviation decreases, the direction of the next voltage disturbance is the same as the direction of the voltage disturbance. When the deviation does not decrease, the direction of the next voltage disturbance is opposite to the direction of the voltage disturbance.

[0052] Electronic device 200, which can serve as a server or client in this application, is described below as an example of hardware devices that can be applied to various aspects of this application. Electronic device 200 is intended to represent various forms of digital electronic computer devices, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic device 200 can also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the application described and / or claimed herein.

[0053] Electronic device 200 includes a computing unit that can perform various appropriate actions and processes based on a computer program stored in read-only memory (ROM) or a computer program loaded from a storage unit into random access memory (RAM). The RAM may also store various programs and data required for device operation. The computing unit, ROM, and RAM are interconnected via a bus. Input / output (I / O) interfaces are also connected to the bus.

[0054] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc. In this application, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of this application according to actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units can be implemented in hardware or as software functional units.

[0055] Although the above disclosure is provided, the scope of protection of this application is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this application, and all such changes and modifications will fall within the scope of protection of this application.

Claims

1. A wireless charging transmitter control method, characterized in that, include: Obtain the target setpoint value for the transmitting coil current; A voltage perturbation is applied to the output voltage of the power factor correction circuit, the transmitting coil current is detected, and the deviation between the transmitting coil current and the target setpoint is obtained. Based on the change in deviation compared to before the voltage disturbance was applied, the direction of the next voltage disturbance is determined until the deviation between the transmitting coil current and the target given value is less than a preset threshold. When the deviation decreases, the direction of the next voltage disturbance is the same as the direction of the voltage disturbance. When the deviation does not decrease, the direction of the next voltage disturbance is opposite to the direction of the voltage disturbance.

2. The wireless charging transmitter control method according to claim 1, characterized in that, Applying a voltage disturbance to the output voltage of the power factor correction circuit includes: Based on the current output voltage of the power factor correction circuit, a preset positive or negative voltage disturbance step size is superimposed.

3. The wireless charging transmitter control method according to claim 2, characterized in that, Determining the direction of the next voltage disturbance based on the change in the deviation compared to before the voltage disturbance was applied includes: The preset voltage perturbation step size is adjusted according to the magnitude of the deviation, wherein the preset voltage perturbation step size and the magnitude of the deviation are positively correlated.

4. The wireless charging transmitter control method according to claim 1, characterized in that, The detection of the transmitting coil current includes: The system receives signals transmitted by a wireless charging receiver via wireless communication and determines the current of the transmitting coil based on the signals, wherein the signals include charging current and / or receiving power.

5. The wireless charging transmitter control method according to claim 1, characterized in that, Before applying a voltage perturbation to the output voltage of the power factor correction circuit, the method further includes: Detect the transmitting coil current to obtain the pre-disturbance deviation between the transmitting coil current and the target setpoint; The deviation before the disturbance is used as a benchmark for comparison with the change in the deviation before the voltage disturbance was applied.

6. The wireless charging transmitter control method according to claim 1, characterized in that, Also includes: When the deviation is less than the preset threshold, the voltage disturbance is paused, and the output voltage of the power factor correction circuit remains unchanged. The deviation is obtained by detecting the transmitting coil current during the period when the applied voltage disturbance is paused; When the deviation is greater than or equal to the preset threshold, the voltage disturbance is resumed.

7. The wireless charging transmitter control method according to claim 1, characterized in that, Applying a voltage perturbation to the output voltage of the power factor correction circuit and detecting the transmitting coil current includes: After applying a voltage disturbance to the output voltage and waiting for a preset time, the amplitude of the transmitting coil current is detected.

8. A control device for a wireless charging transmitter, characterized in that, include: The acquisition module is used to acquire the target given value of the transmitting coil current; The deviation determination module is used to apply a voltage perturbation to the output voltage of the power factor correction circuit, detect the transmitting coil current, and obtain the deviation between the transmitting coil current and the target setpoint. The disturbance determination module is used to determine the direction of the next voltage disturbance based on the change of the deviation compared to before the voltage disturbance was applied, until the deviation between the transmitting coil current and the target given value is less than a preset threshold. When the deviation decreases, the direction of the next voltage disturbance is the same as the direction of the voltage disturbance. When the deviation does not decrease, the direction of the next voltage disturbance is opposite to the direction of the voltage disturbance.

9. An electronic device, characterized in that, Including memory and processor; The memory is used to store computer programs; The processor is configured to implement the wireless charging transmitter control method as described in any one of claims 1-7 when executing the computer program.

10. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the wireless charging transmitter control method as described in any one of claims 1-7.

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