Control methods, control devices and electronic devices for wireless power transmission systems

Abstract

This invention discloses a control method, control device, and electronic device for a wireless power transmission system. The method includes: acquiring operating condition information of the wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter of the wireless power transmission system, the input voltage of the inverter, and the output current of the inverter; generating a control command set based on the operating condition information, the control command set being used to control the inverter to execute a preset control strategy, wherein the preset control strategy includes at least one of the following: an asymmetric voltage cancellation control strategy, a phase-shifted full-bridge control strategy, and a frequency conversion control strategy. This invention solves the technical problem that existing wireless power transmission system inverters cannot achieve wide-range soft switching.

Description

Technical Field

[0001] This invention relates to the field of wireless power transmission system technology, and more specifically, to a control method, control device, and electronic device for a wireless power transmission system. Background Technology

[0002] With the explosive growth of electric vehicles, charging technology has become one of the breakthroughs in innovation and development in the electric vehicle field. Emerging wireless charging technology is gradually replacing traditional wired charging technology and is becoming the preferred charging method. The structure of an electric vehicle wireless charging system mainly includes a mains power supply, an AC-DC rectifier, a DC-AC inverter, a compensation network, transmitting / receiving coils, and a load. Existing inverters cannot achieve wide-range soft switching, thus failing to guarantee efficient energy transfer within the system.

[0003] There is currently no effective solution to the problem that inverters in existing wireless power transmission systems cannot achieve wide-range soft switching. Summary of the Invention

[0004] This invention provides a control method, control device, and electronic device for a wireless power transmission system, to at least solve the technical problem that existing wireless power transmission system inverters cannot achieve wide-range soft switching.

[0005] According to one aspect of the present invention, a control method for a wireless power transmission system is provided, comprising: acquiring operating condition information of the wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter of the wireless power transmission system, the input voltage of the inverter, and the output current of the inverter; generating a control instruction set based on the operating condition information, the control instruction set being used to control the inverter to execute a preset control strategy, wherein the preset control strategy includes at least one of the following: an asymmetric voltage cancellation control strategy, a phase-shifting full-bridge control strategy, and a frequency conversion control strategy.

[0006] Optionally, a control instruction set is generated based on operating condition information, including: determining the fundamental voltage and square wave voltage based on the output voltage; determining the phase difference between the fundamental voltage and the output current as a first phase value; determining the phase difference between the rising edge of the square wave voltage and the fundamental voltage as a second phase value; obtaining the phase shift angle of the output voltage; and generating a first target control instruction in the control instruction set based on the first phase value, the second phase value, and the phase shift angle, wherein the first target control instruction is used to control the inverter to execute the frequency conversion control strategy.

[0007] Optionally, generating a first target control instruction in the control instruction set based on the first phase value, the second phase value, and the phase shift angle includes: generating the first target control instruction in response to the phase shift angle remaining unchanged and the second phase value being greater than the first phase value.

[0008] Optionally, generating a control instruction set based on operating condition information further includes: calculating a first threshold based on the input voltage; calculating a second threshold based on the input voltage, wherein the second threshold is greater than the first threshold; generating one of a second target control instruction in the control instruction set and a third target control instruction in the control instruction set based on the output voltage, the first threshold, and the second threshold, wherein the second target control instruction is used to control the inverter to execute a phase-shifting full-bridge control strategy, and the third target control instruction is used to control the inverter to execute an asymmetric voltage cancellation control strategy.

[0009] Optionally, one of the second target control instruction in the control instruction set and the third target control instruction in the control instruction set is generated based on the output voltage, the first threshold, and the second threshold, including: generating the second target control instruction in response to the effective value of the output voltage being less than or equal to the first threshold.

[0010] Optionally, generating one of the second target control instruction in the control instruction set and the third target control instruction in the control instruction set based on the output voltage, the first threshold, and the second threshold further includes: generating the third target control instruction in response to the effective value of the output voltage being greater than the first threshold and the effective value of the output voltage being less than or equal to the second threshold.

[0011] According to another aspect of the present invention, a control device for a wireless power transmission system is also provided, comprising: an acquisition module for acquiring operating condition information of the wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter, the input voltage of the inverter, and the output current of the inverter; and a generation module for generating a control instruction set based on the operating condition information, wherein the control instruction set is used to control the wireless power transmission system to execute a preset control strategy, wherein the preset control strategy includes at least one of the following: an asymmetric voltage cancellation control strategy, a phase-shifting full-bridge control strategy, and a frequency conversion control strategy.

[0012] According to another aspect of the present invention, a computer-readable storage medium is also provided, wherein a computer program is stored therein, wherein the computer program is configured to execute the above-described method at runtime.

[0013] According to another aspect of the present invention, a processor is also provided, the processor being configured to run a computer program to perform the above-described method.

[0014] According to another aspect of the present invention, an electronic device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the above-described method through the computer program.

[0015] In this embodiment of the invention, by acquiring the operating condition information of the wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter of the wireless power transmission system, the input voltage of the inverter, and the output current of the inverter, and generating a control instruction set based on the operating condition information, the control instruction set is used to control the inverter to execute a preset control strategy. Various different preset control strategies can realize the soft switching of the inverter within a certain range, enabling the wireless power transmission system to reasonably execute different preset control strategies according to the operating condition information. The inverter of the wireless power transmission system can realize a wider range of soft switching, thereby solving the technical problem that the inverter of the existing wireless power transmission system cannot realize a wide range of soft switching. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a structural block diagram of an optional wireless power transmission system control method according to an embodiment of the present invention applied to an electronic device in a vehicle;

[0018] Figure 2 This is a flowchart illustrating an optional control method for a wireless power transmission system according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of an optional wireless power transmission system according to an embodiment of the present invention;

[0020] Figure 4 This is a waveform diagram of the output voltage and current of an inverter in an optional wireless power transfer system according to an embodiment of the present invention during soft switching.

[0021] Figure 5 This is a waveform diagram of the output voltage and current of an inverter in an optional wireless power transfer system according to an embodiment of the present invention during hard switching.

[0022] Figure 6 This is a schematic diagram of the inverter output module of an optional wireless power transmission system according to an embodiment of the present invention;

[0023] Figure 7 This is an output voltage and current waveform diagram of an optional wireless power transfer system according to an embodiment of the present invention when executing a phase-shifted full-bridge control strategy;

[0024] Figure 8 This is an output voltage and current waveform diagram of an optional wireless power transfer system according to an embodiment of the present invention when implementing an asymmetric voltage cancellation control strategy;

[0025] Figure 9 This is a diagram showing the relationship between output voltage and phase shift angle when an optional wireless power transfer system according to an embodiment of the present invention executes different preset control strategies;

[0026] Figure 10 This is a diagram showing the relationship between the second phase value and the phase shift angle when an optional wireless power transmission system according to an embodiment of the present invention executes different preset control strategies;

[0027] Figure 11 This is a structural block diagram of a control device for an optional wireless power transmission system according to an embodiment of the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] According to an embodiment of the present invention, a method embodiment of a control method for a wireless power transmission system is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0031] This method embodiment can be executed in an electronic device or similar computing device that includes memory and a processor within a vehicle. Taking an electronic device running in a vehicle as an example, such as... Figure 1As shown, the vehicle's electronic devices may include one or more processors 102 (processors may include, but are not limited to, central processing units (CPUs), graphics processing units (GPUs), digital signal processing (DSP) chips, microprocessors (MCUs), programmable logic devices (FPGAs), neural network processors (NPUs), tensor processors (TPUs), artificial intelligence (AI) type processors, etc.) and a memory 104 for storing data. Optionally, the aforementioned vehicle's electronic devices may also include a transmission device 106 for communication functions, an input / output device 108, and a display device 110. Those skilled in the art will understand that... Figure 1 The structures shown are for illustrative purposes only and do not limit the structure of the electronic devices in the vehicle described above. For example, the electronic devices in a vehicle may include more or fewer components than those described above, or have a different configuration than those described above.

[0032] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the control method of the wireless power transmission system in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby realizing the aforementioned control method of the wireless power transmission system. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0033] The transmission device 106 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0034] Display device 110 may be, for example, a touchscreen liquid crystal display (LCD) and a touch display (also referred to as a "touchscreen" or "touch display"). The LCD allows a user to interact with the user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (GUI), which allows the user to interact with the GUI via finger contact and / or gestures on a touch-sensitive surface. Optional human-computer interaction functions include: creating web pages, drawing, word processing, creating electronic documents, playing games, video conferencing, instant messaging, sending and receiving emails, a call interface, playing digital video, playing digital music, and / or web browsing, etc. Executable instructions for performing the above human-computer interaction functions are configured / stored in one or more processor-executable computer program products or readable storage media.

[0035] This embodiment provides a control method for a wireless power transmission system of an electronic device operating in the aforementioned vehicle. Figure 2 This is a flowchart of a control method for a wireless power transmission system according to one embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps:

[0036] Step S10: Obtain the operating condition information of the wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter of the wireless power transmission system, the input voltage of the inverter, and the output current of the inverter.

[0037] Step S20: Generate a control instruction set based on the operating condition information. The control instruction set is used to control the inverter to execute a preset control strategy. The preset control strategy includes at least one of the following: asymmetric voltage cancellation control strategy, phase-shifting full-bridge control strategy, and frequency conversion control strategy.

[0038] The technical solution of this embodiment acquires the operating condition information of the wireless power transmission system, which includes at least one of the following: the output voltage of the inverter of the wireless power transmission system, the input voltage of the inverter, and the output current of the inverter. Based on the operating condition information, a control instruction set is generated. The control instruction set is used to control the inverter to execute a preset control strategy. Various preset control strategies can realize the soft switching of the inverter within a certain range, enabling the wireless power transmission system to reasonably execute different preset control strategies according to the operating condition information. The inverter of the wireless power transmission system can realize a wider range of soft switching, thereby solving the technical problem that the inverter of the existing wireless power transmission system cannot realize a wide range of soft switching.

[0039] Soft switching refers to a semiconductor device operating under zero voltage or zero current during switching; that is, it conducts (or turns off) under zero voltage conditions and turns off (or turns on) under zero current conditions. During the switching process, the voltage and current waveforms of a soft switch almost do not overlap. Soft switching can achieve very low losses during conduction and turn-off. Hard switching, abbreviated as HS, involves non-zero voltage and current during switching, and the voltage and current change rapidly, resulting in significant overshoot and switching noise. Five drawbacks of hard switching hinder the increase of the operating frequency of semiconductor switching devices: First, severe electromagnetic interference; second, diode reverse recovery problems; third, large inductive turn-off voltage spikes; and fourth, high turn-on and turn-off losses.

[0040] A phase-shifting full-bridge converter (PS FB) utilizes the junction capacitance of power devices and the leakage inductance of a transformer as resonant elements. This allows the four switching transistors of the full-bridge power supply to sequentially conduct at zero voltage (ZVS), achieving constant-frequency soft switching, improving the overall efficiency and EMI performance of the power supply, and increasing its power density. For example... Figure 6 The diagram shows the output of an inverter under phase-shifted full-bridge control.

[0041] The output voltage and current waveforms of the inverter are as follows: Figure 4 As shown, ut is the square wave voltage output by the inverter, ut1 is its fundamental voltage, and it is the sinusoidal current output by the inverter. t (i.e., the first phase value) is the phase difference between the fundamental voltage ut1 and the current it. 1 (i.e., the second phase value) is the phase difference between the rising edge of the square wave voltage ut and the fundamental voltage ut1, while Δ This is the phase difference between the rising edge of the square wave voltage ut and the current it. To achieve the soft-switching function of the inverter, it needs to be less than 0 when the square wave voltage ut rises from 0 to a high level, and greater than 0 when the square wave voltage ut falls from 0 to a low level. Therefore... t and Δ Both must be greater than 0, meaning the equivalent load of the inverter needs to be inductively biased, and the phase difference between the rising edge of the square wave voltage ut and the fundamental voltage ut1 must be greater than 0. 1. It should be as small as possible.

[0042] Figure 3 A schematic diagram of a wireless charging system for electric vehicles. Figure 4 The figure shows the output voltage and current waveforms when the inverter is in soft-switching mode. Figure 5 The figure shows the output voltage and current waveforms when the inverter is hard-switched. Figure 6 This is a schematic diagram of the inverter output. Figure 7This is a waveform diagram of the output voltage and current of an inverter using a phase-shift control strategy, where uin1 is the fundamental voltage ut1. Figure 8 The output voltage and current waveforms of the inverter under the asymmetric voltage cancellation control strategy are shown. Figure 9 This is a graph showing the relationship between the fundamental effective value of the output voltage and the phase shift angle. Figure 10 for 1. Relationship between phase angle and phase shift angle.

[0043] To improve the system's transmission power, while keeping the input voltage constant, the phase angle of the inverter's equivalent load... t can only be slightly greater than 0. If If t is too large, the reactive power output of the inverter will be too high, which is detrimental to the wireless charging system. In circuit design, t is determined by the resonant network and the receiver load, and is not affected by the inverter. What can be controlled by the inverter is... 1. If 1 greater than t, its waveform is as follows Figure 5 As shown, soft switching cannot be achieved at this time, but it can be achieved otherwise. Figure 4 That's how you achieve soft switching.

[0044] Inverter output diagram as shown Figure 6 As shown. In order to... Figure 5 To achieve soft switching of the inverter as much as possible under the output voltage waveform shown, adjustments can be made in the following three ways. The first method is to use a controllable rectifier circuit at the receiver end of the wireless power transmission system to adjust the reflection impedance Zref at the transmitter end, thereby affecting the inverter's output equivalent load Zinv, making... t greater than 1. This achieves soft switching. The disadvantage is that if... An excessively large t will lead to a decrease in system transmission efficiency and transmission power. The second approach is to utilize different fixed-frequency control schemes at the transmitting end to improve the system's efficiency. 1. As small as possible, to ensure t is likely to be greater than 1. This achieves soft switching. However, in existing technologies, inverter control mainly employs phase-shifted full-bridge control, and its control method is as follows: Figure 7 As shown, its advantage is that by using the phase difference between switches, the inverter output can be adjusted from 0 to the desired value, and the desired value can also be changed back to 0. However, when using a phase-shift control strategy, 1 is too large, it may be greater than 1. This prevents the inverter from achieving a wide range of soft switching. The third approach involves using a frequency converter control scheme at the transmitter to change the reflective impedance Zref at the receiver, affecting the inverter's equivalent output load Zinv, thus... t greater than 1. This enables soft switching.

[0045] The technical solution of this application employs a composite control scheme and optimizes parameters. 1 and This application provides a scheme combining phase-shifted full-bridge control and asymmetric voltage cancellation control, which expands the range of soft switching in wireless power transfer systems. Compared to single phase-shift control, this scheme can achieve soft switching even when the inverter's equivalent load is weakly inductive and the system's power transmission is relatively small. Furthermore, when fixed-frequency control cannot meet the soft switching requirements, this scheme also introduces variable-frequency control. According to standards, the operating frequency range of wireless charging systems is 81~90kHz. Therefore, this scheme operates at the mainstream 85.5kHz for fixed-frequency control, but when frequency modulation control is required, the operating frequency varies within the 81~90kHz range, thereby ensuring more efficient system power transmission. The technical solution of this application uses a combination of phase-shifted control and asymmetric voltage cancellation, along with fixed-frequency control and variable-frequency control, to achieve effective inverter output.

[0046] The fixed-frequency control scheme for the inverter is described below: The phase-shifting control method is as follows: Figure 7 As shown, all four switches have a duty cycle of 50%. S1 and S2 are not turned on simultaneously, and S3 and S4 are not turned on simultaneously. The phase shift angle of S1 and S4 is α. When the bus voltage U0 on the inverter input side remains constant, the effective value of the fundamental frequency of the inverter output voltage is... 1. As shown in the following two formulas: , .

[0047] Asymmetric voltage cancellation control methods, such as Figure 8 As shown, S1 and S2 are not turned on simultaneously, and their duty cycle is 50%. S3 and S4 are not turned on simultaneously, and the duty cycle of S3 when it is high is 50% + α / 180. When the bus voltage on the inverter input side is also U0, the effective value of the fundamental frequency of the inverter output voltage is... 1. As shown in the following two formulas: , .

[0048] Therefore, after α is changed, the effective value of the fundamental frequency of the output voltage under both control conditions is as follows: Figure 9 As shown. Figure 9 As shown, when the output voltages are equal, α is 44.1° under asymmetric voltage cancellation control, while α is 37.8° under phase-shift control. At this time, the asymmetric voltage cancellation control... 1 is 16.65°, which is less than 18.7° under phase-shift control. That is, when the inverter output impedance Zinv's phase angle... Within the range (16.65, 18.7), asymmetric voltage cancellation control enables soft switching of the inverter, while phase-shift control does not. As α increases, both control methods induce... The more obvious the difference, the more obvious the advantage of asymmetric voltage cancellation control.

[0049] The inverter executes an asymmetric voltage cancellation control strategy and the voltage control range is within [ , When the voltage is between [0, ..., there is no state where the output voltage is 0]. The inverter cannot be turned off under asymmetrical voltage cancellation control. Therefore, the technical solution of this application is adopted, which combines asymmetrical voltage cancellation control and phase shift control. Phase shift control is used to turn off the inverter, while asymmetrical voltage cancellation control is used to regulate the voltage. The specific operation is as follows: When the inverter is turned on, when the desired voltage is between [0, ..., ..., ..., ... When the voltage is within the specified range, phase-shift control is used. This ensures the inverter can be turned off normally. When the desired voltage rises, within […]. , When the inverter switches to asymmetrical voltage cancellation control within the specified range, the range of soft switching of the inverter can be increased, and the system efficiency can be improved.

[0050] like Figure 6 As shown, with the increase of α, 1. This continues to increase. Therefore, despite employing asymmetric voltage cancellation control to minimize [the impact], [the voltage] is still increasing. 1, but The maximum value will still reach 30. If the load is not adjusted at the receiving end or no changes are made at the transmitting end, for Systems with a t less than 30 still cannot achieve soft-switching functionality. The system waveform at this time is as follows: Figure 5 As shown.

[0051] To address this situation, the technical solution of this application introduces frequency conversion control, setting the rated frequency to 85.5kHz, while the frequency conversion range is 81~90kHz. Under asymmetric voltage cancellation control... 1 has reached its maximum value. t greater than At time 1, frequency conversion control begins. The only difference in control is the change in switching frequency; however, α remains constant, as determined in fixed-frequency control. Frequency adjustment causes a change in Zinv, thus affecting the phase of the inverter output voltage and current. t then changes. Because the frequency increases or decreases under different conditions... Since the increase or decrease of t is not linear, this scheme adjusts the frequency by observing perturbations.

[0052] The specific operation is as follows: 1) When using asymmetrical voltage cancellation control, detect the rising edge signals of voltage and current, and obtain them respectively. 1 and If the system output power reaches the target value, α will not change further, and the system will reach a steady state. If it detects... 1 greater than t, start frequency conversion control. 2) First increase the operating frequency (generally, increasing the frequency will make the system more inductive). t will increase), observe If t increases, then the operating frequency decreases. (Detection) 1 and Does t meet the soft-switching condition? If the condition is met, frequency change stops; if the condition is not met but the frequency has reached its upper or lower limit, frequency change also stops. Due to the frequency change, the system experiences a power decrease because it deviates from 85.5kHz, therefore, adjustment α needs to be increased. Increasing α will cause... The size of the 1-digit number makes it easier to implement soft switching.

[0053] In an optional embodiment, online evaluation can also be performed. The method of t is used for frequency conversion control of the inverter.

[0054] Optionally, a control instruction set is generated based on the operating condition information, including:

[0055] Step S201: Determine the fundamental voltage and square wave voltage based on the output voltage;

[0056] First, obtain the output voltage signal of the inverter, and then determine the fundamental voltage and square wave voltage based on the output voltage signal.

[0057] Step S202: Determine the phase difference between the fundamental voltage and the output current as the first phase value;

[0058] Step S203: Determine the phase difference between the rising edge of the square wave voltage and the fundamental voltage as the second phase value;

[0059] Step S204: Obtain the phase shift angle of the output voltage;

[0060] Step S205: Generate a first target control instruction in the control instruction set based on the first phase value, the second phase value, and the phase shift angle. The first target control instruction is used to control the inverter to execute the frequency conversion control strategy.

[0061] Optionally, in step S205, a first target control command is generated based on the first phase value, the second phase value, and the phase shift angle, including the following execution steps:

[0062] In response to the phase shift angle remaining unchanged and the second phase value being greater than the first phase value, a first target control command is generated;

[0063] In other words, when detected 1 greater than When the phase shift angle α remains constant, the inverter executes a frequency conversion control strategy. Executing the frequency conversion control strategy involves first adjusting the operating frequency and then adjusting the phase shift angle α, while observing the changes during this process. The change of t.

[0064] Optionally, generating a control instruction set based on operating condition information further includes: calculating a first threshold based on the input voltage; calculating a second threshold based on the input voltage, wherein the second threshold is greater than the first threshold; generating one of a second target control instruction in the control instruction set and a third target control instruction in the control instruction set based on the output voltage, the first threshold, and the second threshold, wherein the second target control instruction is used to control the inverter to execute a phase-shifting full-bridge control strategy, and the third target control instruction is used to control the inverter to execute an asymmetric voltage cancellation control strategy.

[0065] In an optional embodiment, the first threshold is The second threshold is Where U0 is the input voltage.

[0066] Optionally, one of the second target control instruction in the control instruction set and the third target control instruction in the control instruction set is generated based on the output voltage, the first threshold, and the second threshold, including: generating the second target control instruction in response to the effective value of the output voltage being less than or equal to the first threshold.

[0067] Optionally, generating one of the second target control instruction in the control instruction set and the third target control instruction in the control instruction set based on the output voltage, the first threshold, and the second threshold further includes: generating the third target control instruction in response to the effective value of the output voltage being greater than the first threshold and the effective value of the output voltage being less than or equal to the second threshold.

[0068] Figure 11 This is a structural block diagram of a control device for a wireless power transmission system according to one embodiment of the present invention, such as... Figure 11 As shown, the device includes:

[0069] The acquisition module 51 is used to acquire the operating condition information of the wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter, the input voltage of the inverter, and the output current of the inverter.

[0070] The generation module 52 is used to generate a control instruction set based on the operating condition information. The control instruction set is used to control the wireless power transmission system to execute a preset control strategy. The preset control strategy includes at least one of the following: asymmetric voltage cancellation control strategy, phase-shifting full-bridge control strategy, and frequency conversion control strategy.

[0071] The aforementioned device acquires the operating condition information of the wireless power transmission system, including at least one of the following: the output voltage of the inverter, the input voltage of the inverter, and the output current of the inverter. Based on the operating condition information, a control command set is generated. The control command set is used to control the inverter to execute preset control strategies. Various preset control strategies can achieve soft switching of the inverter within a certain range, enabling the wireless power transmission system to reasonably execute different preset control strategies according to the operating condition information. The inverter of the wireless power transmission system can achieve a wider range of soft switching, thereby solving the technical problem that the inverters of existing wireless power transmission systems cannot achieve a wide range of soft switching.

[0072] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0073] Embodiments of the present invention also provide a storage medium storing a computer program, wherein the computer program is configured to execute the steps in any of the above method embodiments when running.

[0074] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0075] Step S1: Obtain the operating condition information of the wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter of the wireless power transmission system, the input voltage of the inverter, and the output current of the inverter;

[0076] Step S2: Generate a control instruction set based on the operating condition information. The control instruction set is used to control the inverter to execute a preset control strategy. The preset control strategy includes at least one of the following: asymmetric voltage cancellation control strategy, phase-shifting full-bridge control strategy, and frequency conversion control strategy.

[0077] Embodiments of the present invention also provide a processor configured to run a computer program to perform the steps in any of the above method embodiments.

[0078] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0079] Step S1: Obtain the operating condition information of the wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter of the wireless power transmission system, the input voltage of the inverter, and the output current of the inverter;

[0080] Step S2: Generate a control instruction set based on the operating condition information. The control instruction set is used to control the inverter to execute a preset control strategy. The preset control strategy includes at least one of the following: an asymmetric voltage cancellation control strategy, a phase-shifting full-bridge control strategy, and a frequency conversion control strategy. An embodiment of the present invention also provides an electronic device, including a memory and a processor. The memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any of the above method embodiments.

[0081] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0082] Step S1: Obtain the operating condition information of the wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter of the wireless power transmission system, the input voltage of the inverter, and the output current of the inverter;

[0083] Step S2: Generate a control instruction set based on the operating condition information. The control instruction set is used to control the inverter to execute a preset control strategy. The preset control strategy includes at least one of the following: asymmetric voltage cancellation control strategy, phase-shifting full-bridge control strategy, and frequency conversion control strategy. The sequence numbers of the above embodiments of the present invention are only for description and do not represent the superiority or inferiority of the embodiments.

[0084] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0085] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0086] 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 units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0087] Furthermore, the functional units in the various embodiments of the present invention 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 unit can be implemented in hardware or as a software functional unit.

[0088] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0089] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method for a wireless power transmission system, characterized in that, include: Obtain operating condition information of a wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter of the wireless power transmission system, the input voltage of the inverter, and the output current of the inverter; A control instruction set is generated based on the operating condition information. The control instruction set is used to control the inverter to execute a preset control strategy. The preset control strategy includes at least one of the following: asymmetric voltage cancellation control strategy, phase-shifting full-bridge control strategy, and frequency conversion control strategy. A control command set is generated based on the aforementioned operating condition information, including: The fundamental voltage and square wave voltage are determined based on the output voltage. The phase difference between the fundamental voltage and the output current is determined as the first phase value; The phase difference between the rising edge of the square wave voltage and the fundamental voltage is determined as the second phase value; Obtain the phase shift angle of the output voltage; Based on the first phase value, the second phase value, and the phase shift angle, a first target control instruction is generated in the control instruction set, wherein the first target control instruction is used to control the inverter to execute the frequency conversion control strategy; The control instruction set generated based on the aforementioned operating condition information also includes: Calculate the first threshold based on the input voltage; A second threshold is calculated based on the input voltage, wherein the second threshold is greater than the first threshold; Based on the output voltage, the first threshold, and the second threshold, one of the second target control instruction and the third target control instruction in the control instruction set is generated. The second target control instruction is used to control the inverter to execute the phase-shifted full-bridge control strategy, and the third target control instruction is used to control the inverter to execute the asymmetric voltage cancellation control strategy.

2. The method according to claim 1, characterized in that, Based on the first phase value, the second phase value, and the phase shift angle, a first target control command is generated from the control command set, including: In response to the phase shift angle remaining unchanged and the second phase value being greater than the first phase value, the first target control command is generated.

3. The method according to claim 2, characterized in that, Based on the output voltage, the first threshold, and the second threshold, one of the second target control instruction and the third target control instruction in the control instruction set is generated, including: When the effective value of the output voltage is less than or equal to the first threshold, the second target control command is generated.

4. The method according to claim 2, characterized in that, Based on the output voltage, the first threshold, and the second threshold, one of the second target control instruction in the control instruction set and the third target control instruction in the control instruction set is generated, and the method further includes: The third target control command is generated when the effective value of the output voltage is greater than the first threshold and the effective value of the output voltage is less than or equal to the second threshold.

5. A control device for a wireless power transmission system, characterized in that, include: An acquisition module is used to acquire operating condition information of a wireless power transmission system, wherein the operating condition information includes at least one of the following: the output voltage of the inverter, the input voltage of the inverter, and the output current of the inverter; A generation module is used to generate a control instruction set based on the operating condition information. The control instruction set is used to control the wireless power transmission system to execute a preset control strategy. The preset control strategy includes at least one of the following: an asymmetric voltage cancellation control strategy, a phase-shifting full-bridge control strategy, and a frequency conversion control strategy. A control command set is generated based on the aforementioned operating condition information, including: The fundamental voltage and square wave voltage are determined based on the output voltage. The phase difference between the fundamental voltage and the output current is determined as the first phase value; The phase difference between the rising edge of the square wave voltage and the fundamental voltage is determined as the second phase value; Obtain the phase shift angle of the output voltage; Based on the first phase value, the second phase value, and the phase shift angle, a first target control instruction is generated in the control instruction set, wherein the first target control instruction is used to control the inverter to execute the frequency conversion control strategy; The control instruction set generated based on the aforementioned operating condition information also includes: Calculate the first threshold based on the input voltage; A second threshold is calculated based on the input voltage, wherein the second threshold is greater than the first threshold; Based on the output voltage, the first threshold, and the second threshold, one of the second target control instruction and the third target control instruction in the control instruction set is generated. The second target control instruction is used to control the inverter to execute the phase-shifted full-bridge control strategy, and the third target control instruction is used to control the inverter to execute the asymmetric voltage cancellation control strategy.

6. A computer storage medium, characterized in that, The computer storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer storage medium is located to perform the method according to any one of claims 1 to 4.

7. A processor, characterized in that, The processor is used to run a program, and the processor is configured to run a computer program to perform the method described in any one of claims 1 to 4.

8. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to run the computer program to perform the method described in any one of claims 1 to 4.

Images