Information modulation method and device, electronic equipment, storage medium and program product

Abstract

The information modulation method, device, electronic equipment, storage medium and program product provided by the application belong to the technical field of power electronics and electric energy conversion. The method comprises the following steps: obtaining initial information symbols of to-be-transmitted data; determining a perturbation phase shift angle based on the initial information symbols; superimposing the perturbation phase shift angle on a steady-state phase shift angle of a phase shift full-bridge converter to obtain an output voltage, wherein the output voltage is injected with a square wave perturbation signal corresponding to the initial information symbols; and performing signal conditioning and amplitude extraction on the output voltage to obtain target information symbols of the to-be-transmitted data. The application can realize effective demodulation of information in an isolated high-power application scenario, improve the synergy of power transmission and information transmission, and enhance the information demodulation reliability under long-distance transmission conditions.

Description

Technical Field

[0001] This application relates to the field of power electronics and power conversion technology, and in particular to an information modulation method, apparatus, electronic device, storage medium and program product. Background Technology

[0002] Power Signal Dual Modulation (PSDM) technology aims to achieve coordinated control of information transmission and power conversion by embedding information into the inherent voltage ripple of the power converter, thus utilizing the power circuit itself to complete information transmission. With the widespread application of power electronic systems in industrial power supplies, new energy grid connection, and other fields, the demand for efficient and integrated information transmission and power conversion technologies is increasing.

[0003] Currently, research on PSDM technology mainly focuses on non-isolated DC-DC converters. Among them, frequency shift keying (FSK) based cooperative modulation is a typical scheme. This technology consists of two stages: modulation and demodulation. In modulation, the inherent switching ripple of circuits such as BUCK or BOOST is used as the information carrier. By adjusting the switching frequency, the ripple fundamental frequency switches between two preset frequency points f0 and f1, corresponding to binary data "0" and "1" respectively, thus modulating the information into frequency variations. In demodulation, specific frequency components are identified through spectrum analysis. By detecting whether the signal amplitude at frequency point f0 or f1 exceeds a preset threshold, the transmitted data can be judged, ultimately completing the demodulation of the information. However, the above scheme cannot be directly applied to medium-to-high power isolation scenarios. Summary of the Invention

[0004] The information modulation method, apparatus, electronic equipment, storage medium, and program products provided in this application are used to achieve coordinated optimization of power transmission and information modulation in isolated converters.

[0005] In a first aspect, this application provides an information modulation method, comprising:

[0006] Obtain the initial information symbols of the data to be transmitted;

[0007] Determine the disturbance phase shift angle based on the initial information symbols;

[0008] The disturbance phase shift angle is superimposed on the steady-state phase shift angle of the phase-shifted full-bridge converter to obtain the output voltage, wherein the output voltage is the square wave disturbance signal injected corresponding to the initial information symbol;

[0009] The output voltage is conditioned and its amplitude is extracted to obtain the target information symbol of the data to be transmitted.

[0010] In one possible embodiment, the perturbation phase shift angle is superimposed on the steady-state phase shift angle of the phase-shifted full-bridge converter to obtain the output voltage, wherein the output voltage is the square wave perturbation signal injected corresponding to the initial information symbol, including:

[0011] By controlling the phase of the lagging arm of the phase-shifting full-bridge converter, the disturbance phase shift angle is superimposed on the steady-state phase shift angle to obtain the dynamic phase shift angle, wherein the phase of the leading arm of the phase-shifting full-bridge converter remains unchanged;

[0012] Based on the dynamic phase shift angle, the conduction timing of the switching transistors in the phase-shifted full-bridge converter is controlled to obtain the output voltage of the square wave disturbance signal corresponding to the information symbol.

[0013] In one possible embodiment, the dynamic phase shift angle is obtained by controlling the phase of the lag arm of the phase-shifting full-bridge converter to superimpose the disturbance phase shift angle onto the steady-state phase shift angle, including:

[0014] Determine the polarity of the square wave corresponding to the initial information symbol;

[0015] If the square wave polarity is positive, the phase of the lagging bridge arm is shifted to the right to superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifting full-bridge converter, thus obtaining the dynamic phase shift angle.

[0016] If the square wave polarity is negative, the phase of the lagging bridge arm is shifted to the left to superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifting full-bridge converter, thus obtaining the dynamic phase shift angle.

[0017] In one possible embodiment, the output voltage is signal conditioned and amplitude extracted to obtain the target information symbol of the data to be transmitted, including:

[0018] Signal conditioning is performed on the square wave disturbance signal in the output voltage to obtain the disturbance frequency ripple;

[0019] Discrete Fourier transform analysis was performed on the perturbation frequency ripple to obtain the fundamental frequency amplitude of the square wave perturbation;

[0020] If the amplitude of the square wave disturbance fundamental frequency is greater than the preset amplitude threshold, the target information symbol is determined to be 1;

[0021] If the amplitude of the square wave disturbance fundamental frequency is less than or equal to the preset amplitude threshold, the target information symbol is determined to be 0.

[0022] In one possible embodiment, signal conditioning is performed on the square wave disturbance signal in the output voltage to obtain a disturbance frequency ripple, including:

[0023] A DC blocking capacitor is used to filter out the DC component in the square wave disturbance signal to obtain the AC disturbance ripple;

[0024] The AC disturbance ripple is amplified to obtain the amplified AC disturbance ripple;

[0025] By using a bandpass filter, the out-of-band noise of the AC disturbance ripple after gain is filtered out, and the disturbance frequency ripple is obtained.

[0026] In one possible embodiment, determining the disturbance phase shift angle based on the initial information symbols includes:

[0027] The initial information symbols are mapped to square wave disturbance amplitudes, and the square wave disturbance amplitudes are converted into disturbance phase shift angles.

[0028] Secondly, this application provides an information modulation apparatus, comprising:

[0029] The acquisition module is used to acquire the initial information symbols of the data to be transmitted;

[0030] The determination module is used to determine the disturbance phase shift angle based on the initial information symbols;

[0031] The phase-shift control module is used to superimpose the disturbance phase-shift angle onto the steady-state phase-shift angle of the phase-shift full-bridge converter to obtain the output voltage, wherein the output voltage is the square wave disturbance signal injected corresponding to the initial information symbol;

[0032] The signal conditioning circuit is used to condition the output voltage and extract its amplitude to obtain the target information symbol of the data to be transmitted.

[0033] In one possible embodiment, the phase-shifting control module is specifically used for:

[0034] By controlling the phase of the lagging arm of the phase-shifting full-bridge converter, the disturbance phase shift angle is superimposed on the steady-state phase shift angle to obtain the dynamic phase shift angle, wherein the phase of the leading arm of the phase-shifting full-bridge converter remains unchanged;

[0035] Based on the dynamic phase shift angle, the conduction timing of the switching transistors in the phase-shifted full-bridge converter is controlled to obtain the output voltage of the square wave disturbance signal corresponding to the information symbol.

[0036] In one possible embodiment, the phase-shifting control module is specifically used for:

[0037] Determine the polarity of the square wave corresponding to the initial information symbol;

[0038] If the square wave polarity is positive, the phase of the lagging bridge arm is shifted to the right to superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifting full-bridge converter, thus obtaining the dynamic phase shift angle.

[0039] If the square wave polarity is negative, the phase of the lagging bridge arm is shifted to the left to superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifting full-bridge converter, thus obtaining the dynamic phase shift angle.

[0040] In one possible embodiment, the signal conditioning circuit is specifically used for:

[0041] Signal conditioning is performed on the square wave disturbance signal in the output voltage to obtain the disturbance frequency ripple;

[0042] Discrete Fourier transform analysis was performed on the perturbation frequency ripple to obtain the fundamental frequency amplitude of the square wave perturbation;

[0043] If the amplitude of the square wave disturbance fundamental frequency is greater than the preset amplitude threshold, the target information symbol is determined to be 1;

[0044] If the amplitude of the square wave disturbance fundamental frequency is less than or equal to the preset amplitude threshold, the target information symbol is determined to be 0.

[0045] In one possible embodiment, the signal conditioning circuit is specifically used for:

[0046] A DC blocking capacitor is used to filter out the DC component in the square wave disturbance signal to obtain the AC disturbance ripple;

[0047] The AC disturbance ripple is amplified to obtain the amplified AC disturbance ripple;

[0048] By using a bandpass filter, the out-of-band noise of the AC disturbance ripple after gain is filtered out, and the disturbance frequency ripple is obtained.

[0049] In one possible embodiment, the determining module is specifically used for:

[0050] The initial information symbols are mapped to square wave disturbance amplitudes, and the square wave disturbance amplitudes are converted into disturbance phase shift angles.

[0051] Thirdly, this application provides an electronic device, including: a memory and a processor;

[0052] The memory stores instructions that the computer executes;

[0053] The processor executes computer execution instructions stored in memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0054] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed, are used to implement the first aspect and / or various possible embodiments of the first aspect.

[0055] Fifthly, this application provides a computer program product, including a computer program that, when executed, implements the first aspect and / or various possible implementations of the first aspect.

[0056] This application provides an information modulation method, apparatus, electronic device, storage medium, and program product, relating to the fields of power electronics and power conversion technology. The method includes: acquiring initial information symbols of data to be transmitted; determining a disturbance phase-shift angle based on the initial information symbols; superimposing the disturbance phase-shift angle onto the steady-state phase-shift angle of a phase-shifted full-bridge converter to obtain an output voltage, wherein the output voltage is an injected square-wave disturbance signal corresponding to the initial information symbols; and performing signal conditioning and amplitude extraction on the output voltage to obtain the target information symbols of the data to be transmitted. This application, by acquiring the initial information symbols of the data to be transmitted, determining the disturbance phase-shift angle based on the initial information symbols, and superimposing the disturbance phase-shift angle onto the steady-state phase-shift angle of the phase-shifted full-bridge converter to obtain an output voltage with an injected square-wave disturbance signal corresponding to the initial information symbols, enables isolated converters to complete information loading while maintaining power transmission; furthermore, by performing signal conditioning and amplitude extraction on the output voltage to obtain the target information symbols of the data to be transmitted, it enables effective demodulation of information in isolated high-power applications, improving the synergy between power transmission and information transmission, and enhancing the reliability of information demodulation under long-distance transmission conditions. Attached Figure Description

[0057] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0058] Figure 1 Flowchart of the information modulation method provided in the embodiments of this application Figure 1 ;

[0059] Figure 2 This is a circuit diagram of a phase-shifted full-bridge converter provided in an embodiment of this application;

[0060] Figure 3 The waveform diagram of the phase-shifted full-bridge converter provided in the embodiments of this application;

[0061] Figure 4 A schematic diagram illustrating the modulation principle of the information provided in the embodiments of this application;

[0062] Figure 5 A schematic diagram illustrating the principle of information demodulation provided in the embodiments of this application;

[0063] Figure 6 A schematic diagram of the information modulation device provided in this application;

[0064] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0065] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0066] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0067] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with relevant laws, regulations and standards, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0068] With the rapid development of the Internet of Things, smart grids, and distributed energy systems, power electronic converters have broken through the traditional boundaries of single power conversion and transmission functions, accelerating their evolution towards intelligence and networking. Against this backdrop of technological evolution, an emerging technology—power information collaborative modulation technology—aims to break down the physical isolation between "energy flow" and "information flow."

[0069] The core concept of this technology lies in fully utilizing existing power conversion hardware platforms to efficiently and effectively transmit electrical energy while embedding control commands, status monitoring data, and other information into the power carrier via a specific modulation algorithm. This achieves synchronous transmission of "power flow and information flow" at the physical level. Compared to traditional solutions that rely on independent communication cables (such as CAN bus, Wi-Fi, etc.), this bidirectional fusion technology offers significant advantages.

[0070] Reduced system costs: Significantly reduced additional communication cables, transceivers, and a large number of auxiliary sensors, simplifying the physical architecture.

[0071] Improved power density and reliability: It avoids the introduction of bulky communication cables, eliminates potential points of failure, and significantly improves the power density, integration, and overall intelligence level of complex power electronic systems.

[0072] For this reason, power information collaborative modulation technology has shown great application potential and broad market prospects in new energy power generation (such as state interconnection of photovoltaic inverters), wireless charging of electric vehicles (such as high-speed two-way handshake communication between vehicle and charging pile) and extremely confined space fields such as aerospace.

[0073] From the current research perspective, current research on power-information co-modulation technology mainly focuses on non-isolated DC-DC converters such as BUCK and BOOST. Thanks to the simplicity of this topology and the maturity of its control strategies, researchers have successfully achieved coordinated power transmission and information embedding by adjusting parameters such as the carrier frequency and duty cycle of pulse width modulation (PWM).

[0074] However, existing research still has significant limitations in terms of application scenarios and communication performance:

[0075] Limitations in Topology Applicability: Current verification of modulation schemes such as FSK primarily focuses on non-isolated converters, neglecting isolated converters, which are crucial in medium-to-high power applications. In industrial power supplies and renewable energy grid-connected systems, isolated converters, with their electrical isolation capabilities, play an irreplaceable role in preventing leakage current, suppressing common-mode interference, and achieving voltage matching. Therefore, extending power information collaborative modulation technology to isolated converters is a key path to promoting the practical application of this technology in engineering.

[0076] Bottlenecks in communication robustness and transmission distance: In modulation schemes based on phase-shift keying (PSK), the system changes the fundamental frequency phase of the output ripple by switching the carrier phase of the PWM, using a phase difference of 0° and 180° to represent digital signals "0" and "1". The advantage of this scheme is that it utilizes the inherent output ripple of the converter to carry information without changing the ripple amplitude. However, because the amplitude of the fundamental frequency component of the ripple itself is weak, the signal-to-noise ratio deteriorates sharply after attenuation along the transmission path. Limited by the receiver's sensitivity to noise and load disturbances, this scheme often faces a high bit error rate in practical applications, severely limiting its effective communication distance to the near-field range.

[0077] To address the aforementioned issues, this application provides an information modulation method. First, the initial information symbols of the data to be transmitted are obtained, and the disturbance phase shift angle is determined based on the initial information symbols. Then, the disturbance phase shift angle is superimposed on the steady-state phase shift angle of the phase-shifting full-bridge converter to obtain the output voltage of the square wave disturbance signal injected with the initial information symbols. Finally, the output voltage is conditioned and its amplitude is extracted to obtain the target information symbols of the data to be transmitted.

[0078] In a system architecture where the phase-shifted full-bridge converter serves as the core energy transmission topology, the aforementioned technical approach can directly revolve around the output voltage to form an information carrying and recovery process, thus providing a foundation for balancing energy transmission and information interaction in isolated medium-to-high power scenarios.

[0079] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0080] Figure 1 Flowchart of the information modulation method provided in the embodiments of this application Figure 1 ,like Figure 1 As shown, the method includes:

[0081] S101: Obtain the initial information symbols of the data to be transmitted.

[0082] The initial information symbol serves as the raw data unit for the data to be transmitted, acting as the input starting point for information modulation. The data to be transmitted can originate from control commands sent by the upper-level controller, equipment operating status data, fault codes, or measurement parameters, or it can originate from the data register to be reported within the local control unit.

[0083] In this step, acquiring the data to be transmitted includes not only reading the data bits themselves, but also determining the effective start time and duration of the corresponding data bits. If the transmitter uses a timer interrupt method, the next initial information symbol is read when each symbol timer interrupt arrives; if the transmitter uses a state machine method, after the state machine enters the transmission state, data retrieval, latching, and output are completed sequentially. To ensure consistency in subsequent decisions by the receiver, this embodiment can also add predefined training symbols or synchronization symbols before transmitting data. These synchronization symbols are also acquired as part of the initial information symbol sequence and sent to the modulation process, thereby enabling the receiver to establish a threshold or complete time synchronization. This is merely an example.

[0084] S102: Determine the disturbance phase shift angle based on the initial information symbols.

[0085] The disturbance phase shift angle is used to characterize the additional phase offset on the steady-state phase shift angle of the phase-shifted full-bridge converter. It converts the initial information symbols into an angle modulation quantity that can be used for power stage control. The phase-shifted full-bridge converter itself can achieve energy regulation through the relative phase shift of the front and rear bridge arms. The steady-state phase shift angle is the basic phase setting when there is no information superposition, and it is used to maintain the current target output power, voltage, or current control state.

[0086] Based on the above, this embodiment of the application obtains the disturbance phase shift angle by establishing a mapping relationship between symbols and disturbance quantities according to the initial information symbols. In specific implementation, the disturbance phase shift angle corresponding to the initial information symbols can be determined according to a preset correspondence. For example, a "symbol-disturbance phase shift angle" correspondence can be established in a lookup table to map different initial information symbols to different disturbance phase shift angles.

[0087] In one possible implementation, the controller pre-stores the mapping relationship between initial information symbols and disturbance phase shift angles. This mapping relationship can be obtained through experimental calibration. Specifically, given the input voltage, load range, and steady-state phase shift angle, the additional phase shift angle is gradually changed, the response at the target disturbance frequency in the output voltage is measured, and the angle value that meets the demodulation requirements is recorded. During modulation, the controller reads the corresponding disturbance phase shift angle based on the current initial information symbol. After this operation, the initial information symbol can be converted into an angle parameter through mapping, which can then be directly used in phase shift control.

[0088] In another possible implementation, the disturbance phase shift angle can be shifted positively or negatively relative to the steady-state phase shift angle. In this case, to prevent the total phase shift angle after the disturbance from exceeding the converter's allowable operating range, the controller also performs boundary constraint processing when determining the disturbance phase shift angle, ensuring that the superimposed control phase meets the minimum dead-time requirement, soft-switching condition, and controller resolution requirement. Through this conversion, information symbols are embedded into the phase-shift control quantity, maintaining compatibility with the original power regulation mechanism.

[0089] Based on the above analysis, it can be seen that this step transforms abstract data symbols into physical control quantities that can be executed by the power converter, which is a key step in realizing information modulation.

[0090] S103: The disturbance phase shift angle is superimposed on the steady-state phase shift angle of the phase-shifted full-bridge converter to obtain the output voltage, wherein the output voltage is the square wave disturbance signal injected with the initial information symbol.

[0091] In this step, the phase-shifted full-bridge converter acts as a power electronic converter carrying information modulation and power transmission, completing the energy transfer from the input side to the output side within a high-frequency transformer isolation structure. The primary side of the phase-shifted full-bridge converter consists of bridge arms. For a detailed circuit diagram of the phase-shifted full-bridge converter, please refer to [link to circuit diagram]. Figure 2 , Figure 2 This is a circuit diagram of a phase-shifted full-bridge converter provided in an embodiment of this application. Figure 2 As shown, the circuit consists of four switching transistors ( The bridge structure consists of two arms: and Forming an advanced bridge arm, and This forms the lag bridge arm. The two switches in each bridge arm conduct complementaryly, and there is an adjustable phase difference (i.e., phase shift angle) between the drive signals of the two bridge arms. During normal operation, the phase-shifted full-bridge converter always has two switches conducting simultaneously, resulting in four operating combinations: and , and , and , and And so it goes, in a never-ending cycle.

[0092] Figure 3 The waveform diagram shows the operation of the phase-shifted full-bridge converter provided in the embodiments of this application. Figure 3 As shown, taking the first switching cycle as an example, when and When the circuit is turned on, the input voltage is applied to the primary side of the high-frequency transformer, and energy is transferred from the power source to the load. Similarly, when... and When the circuit is turned on, the primary voltage of the transformer reverses direction, continuing to transfer energy. The current change in the output inductor is as follows:

[0093] .

[0094] And in and or and During the period when the circuit is simultaneously conducting, the primary side of the transformer is short-circuited, and the circuit is in a freewheeling state, not transferring energy to the secondary side. However, the primary current still flows, and the current change of the output inductor is as follows:

[0095] .

[0096] Based on the fact that the change in inductor current is constant, the output voltage can be obtained as follows: .

[0097] The steady-state phase shift angle of a phase-shifted full-bridge converter refers to the default phase shift angle of the phase-shifted full-bridge converter when there is no information modulation. It is used to maintain the stability of the output voltage and is determined according to the target transmission voltage of the phase-shifted full-bridge converter.

[0098] In practice, after the initial information symbol value generates the corresponding disturbance phase shift angle, this disturbance phase shift angle is superimposed on the steady-state phase shift angle of the phase-shifted full-bridge converter to obtain the superimposed control phase. Then, after the superimposed control phase takes effect, the phase of the equivalent square wave applied to the primary side of the transformer undergoes a controlled periodic change. This phase change, after being coupled through the transformer, is then passed through the subsequent rectifier and filter circuit, introducing a superimposed disturbance component into the output voltage. This disturbance component manifests as a small ripple around the original output voltage in the time domain. In the frequency domain, it manifests as a specific target disturbance frequency and its series of harmonic components. It should be noted that there is a clear correspondence between the fundamental frequency amplitude of this disturbance component and the phase shift angle it introduces.

[0099] Since the disturbance component is generated by the phase modulation of the square wave signal, the information component carried in the output voltage has a clear fundamental frequency characteristic, which facilitates subsequent signal conditioning and amplitude extraction.

[0100] Furthermore, in this step, the output voltage serves both as the power supply to the load and as the information carrier, therefore the superposition of the disturbance phase shift angle needs to be coordinated with the steady-state closed-loop control.

[0101] Based on the above analysis, it can be seen that this step, without introducing an independent communication link, completes information injection by leveraging the control degrees of freedom of the isolated phase-shifting full-bridge converter itself, making the output voltage a composite signal that simultaneously carries energy and data, thus directly adapting to medium and high power isolated application scenarios.

[0102] S104: Perform signal conditioning and amplitude extraction on the output voltage to obtain the target information symbol of the data to be transmitted.

[0103] The target information symbol is the data symbol recovered by the receiver, representing the demodulation result of the data to be transmitted. Since the output voltage simultaneously contains power transmission components, fluctuation components caused by load changes, and square wave disturbance components introduced by modulation, the receiver needs to perform signal conditioning on the output voltage before performing amplitude extraction.

[0104] In practical implementation, the receiver can be equipped with a voltage sampling branch, a signal conditioning circuit, and a demodulation unit. The voltage sampling branch collects the voltage signal from the output terminal, and after adaptation processing, sends it to the subsequent stage; the signal conditioning process is used to retain the effective frequency components corresponding to the square wave disturbance signal and suppress irrelevant interference; the demodulation unit extracts the amplitude of the conditioned signal and determines the target information symbol based on the extraction result.

[0105] In this step, signal conditioning and amplitude extraction are performed sequentially, with the output of the former constituting the input of the latter. In industrial settings with long links and high noise levels, after signal conditioning, the frequency components corresponding to the disturbances maintain a recognizable amplitude within the decision window; combined with amplitude extraction, the receiver can recover the target information symbol from the output voltage carrying the power.

[0106] Based on the above analysis, this step converts the square wave disturbance signal injected into the output voltage into discrete data symbols, completing the demodulation closed loop from physical voltage ripple to digital information.

[0107] Based on the above analysis, in this embodiment, the initial information symbols, after being determined by the disturbance phase-shift angle, injected with phase-shift control, and demodulated on the output side, form a complete information transmission link connecting the transmitting and receiving ends. This allows the isolated phase-shift full-bridge converter to maintain power transmission while also carrying data. The receiving end recovers the target information symbols by extracting the amplitude of the components corresponding to the target frequency, thereby completing information interaction coordinated with power transmission without relying on an independent communication channel. This makes the scheme directly applicable to long-distance signal transmission requirements in isolated medium-to-high power conversion scenarios.

[0108] In summary, the embodiments of this application obtain the initial information symbols of the data to be transmitted, determine the disturbance phase shift angle based on the initial information symbols, and superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifted full-bridge converter to obtain the output voltage of the square wave disturbance signal corresponding to the initial information symbols. This enables the isolated converter to complete information loading while maintaining power transmission. Furthermore, by performing signal conditioning and amplitude extraction on the output voltage, the target information symbols of the data to be transmitted are obtained. This enables effective demodulation of information in high-power isolated applications, improves the coordination between power transmission and information transmission, and enhances the reliability of information demodulation under long-distance transmission conditions.

[0109] In one possible implementation, the disturbance phase shift angle is superimposed on the steady-state phase shift angle of the phase-shifted full-bridge converter to obtain the output voltage, wherein the output voltage is injected with a square wave disturbance signal corresponding to the initial information symbol. This includes: controlling the phase of the lagging arm of the phase-shifted full-bridge converter to superimpose the disturbance phase shift angle on the steady-state phase shift angle to obtain a dynamic phase shift angle, wherein the phase of the leading arm of the phase-shifted full-bridge converter remains unchanged; and controlling the turn-on timing of the switching transistors in the phase-shifted full-bridge converter based on the dynamic phase shift angle to obtain the output voltage injected with the square wave disturbance signal corresponding to the information symbol.

[0110] In its implementation, the phase-shifted full-bridge converter includes a primary-side full-bridge circuit and a corresponding control unit. The four switches in the primary-side full-bridge circuit are respectively positioned on two bridge arms. The two switches corresponding to the leading bridge arm operate according to a preset steady-state phase, while the two switches corresponding to the lagging bridge arm are phase-shifted relative to the leading bridge arm under the modulation of the control unit. After receiving the disturbance phase-shift angle corresponding to the information symbol, the control unit superimposes this disturbance phase-shift angle onto the original steady-state phase-shift angle, keeping the leading bridge arm unchanged and only adjusting the timing of the drive signal for the lagging bridge arm. This allows for controlled changes in the primary-side voltage pulse width or polarity distribution, enabling control of energy transfer time without altering the duty cycle of the switches, and generating a square wave disturbance signal corresponding to the information symbol at the output.

[0111] Since the above process only applies to the hysteresis arm and the control relationship is clear, it is convenient to extract the amplitude and recover the symbol of the output waveform disturbance characteristics at the receiving end. Thus, it is possible to achieve the coordination of power transmission and information injection in isolated high-power conversion scenarios.

[0112] This application embodiment utilizes the phase control capability of the lag arm of the phase-shifted full-bridge converter to dynamically superimpose the disturbance phase-shift angle onto the steady-state phase-shift angle, ensuring that the information symbols are encoded into the output voltage ripple while maintaining the stability of power transmission.

[0113] Based on the aforementioned embodiments, further, by controlling the phase of the lagging arm of the phase-shifted full-bridge converter to superimpose the disturbance phase shift angle onto the steady-state phase shift angle to obtain the dynamic phase shift angle, the following steps are taken: determining the polarity of the square wave corresponding to the initial information symbol; if the square wave polarity is positive, controlling the phase of the lagging arm to shift to the right to superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifted full-bridge converter to obtain the dynamic phase shift angle; if the square wave polarity is negative, controlling the phase of the lagging arm to shift to the left to superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifted full-bridge converter to obtain the dynamic phase shift angle.

[0114] In the specific implementation, Figure 4 A schematic diagram illustrating the modulation principle of the information provided in the embodiments of this application. For example... Figure 4 As shown, during information modulation, the switching transistor... , The PWM drive signal remains unchanged (i.e., the phases of PWM1 and PWM2 remain unchanged), while , The PWM waveforms are then phase-shifted according to the square wave polarity corresponding to the initial information symbol (i.e., PWM3 and PWM4 are phase-shifted according to the square wave polarity corresponding to the initial information symbol). When the square wave polarity is positive, PWM3 and PWM4 shift to the right. When the square wave polarity is negative, the phase shifts to the left. By superimposing the aforementioned disturbance phase shift angle onto the original steady-state phase shift angle... This allows for the effective introduction of a square wave disturbance signal carrying information into the output of the phase-shifted full-bridge converter. At this time, the output voltage is:

[0115] .

[0116] Where V0 represents the output voltage; n represents the coefficient.

[0117] Furthermore, to ensure that the information modulation process does not disrupt the stable operation of the phase-shifted full-bridge converter itself, the frequency of the square wave disturbance signal should be an even multiple of the switching transistor frequency. .

[0118] This method adjusts the phase of the lagging bridge arm on one side, ensuring that the disturbance phase shift angle is always superimposed around the steady-state phase shift angle. Different phase shift directions are distinguished by the positive or negative polarity of the square wave, thus enabling the formation of a square wave disturbance corresponding to the initial information symbol at the same steady-state operating point. Consequently, a stable mapping relationship is established between the square wave disturbance signal in the output voltage and the information symbol, and the phase adjustment process is coordinated with the main power transmission stage.

[0119] With this implementation, the initial information symbols can be clearly encoded in phase direction through square wave polarity control. The generation method of dynamic phase shift angle is matched with the bridge arm control of the phase-shifting full-bridge converter. The square wave disturbance signal in the output voltage is more convenient for subsequent signal conditioning and amplitude extraction. Moreover, the information modulation process can be completed without changing the steady-state control relationship of the leading bridge arm.

[0120] Based on the aforementioned embodiments, further, signal conditioning and amplitude extraction are performed on the output voltage to obtain the target information symbol of the data to be transmitted, including: signal conditioning of the square wave disturbance signal in the output voltage to obtain the disturbance frequency ripple; performing discrete Fourier transform analysis on the disturbance frequency ripple to obtain the square wave disturbance fundamental frequency amplitude; if the square wave disturbance fundamental frequency amplitude is greater than a preset amplitude threshold, the target information symbol is determined to be 1; if the square wave disturbance fundamental frequency amplitude is less than or equal to the preset amplitude threshold, the target information symbol is determined to be 0.

[0121] Figure 5 This is a schematic diagram illustrating the principle of information demodulation provided in the embodiments of this application. Figure 5As shown, during operation, the receiving end first uses a signal conditioning circuit to condition the output voltage to obtain the perturbation frequency ripple. Then, because the perturbation frequency ripple is complex, containing multiple frequency components, this embodiment performs Discrete Fourier Transform (DFT) coherent demodulation on the perturbation frequency ripple. This accurately extracts the square wave perturbation fundamental frequency amplitude (i.e., the perturbation frequency amplitude) at that frequency. Furthermore, by setting a reasonable decision amplitude threshold, the demodulation of the information symbol is completed, and the target information symbol (i.e., the information symbol corresponding to the square wave perturbation fundamental frequency amplitude) is determined. The basic calculation formula for DFT is as follows:

[0122] .

[0123] Where N is the number of discrete sampling points in the time domain, n is the number of the discrete sampling points in the time domain, and k is the number of the frequency domain signal.

[0124] Optionally, at the receiving end, the square wave disturbance signal is sampled by analog-to-digital conversion at 2-microsecond intervals, and DFT calculation is performed on the data of the most recent 180 points. Let the first AD sampling sequence be s(0), s(1), ..., s(179), let the frequency of the switching transistor be 100kHz, and the frequency of the square wave disturbance signal be 25kHz. The DFT calculation formula for the fundamental frequency amplitude of the square wave disturbance at 25kHz is as follows:

[0125] .

[0126] Where F0 is the square wave perturbation fundamental frequency amplitude obtained in the first calculation, and s(n) is the value of the nth sampled waveform. In the next DFT operation, the sampling sequence becomes s(1), s(2), ..., s(180), and the DFT calculation formula for the square wave perturbation fundamental frequency amplitude is:

[0127] .

[0128] Where F1 is the square wave perturbation fundamental frequency amplitude obtained from the first iteration update, which can be converted into: According to the recursive formula, the amplitude of the square wave perturbation fundamental frequency of the current sequence frequency of 25kHz is calculated. If the amplitude of the square wave perturbation fundamental frequency calculated by the receiver is greater than the amplitude threshold set internally by the program, it is considered that a valid information symbol 1 has been received, that is, the target information symbol is determined to be 1, and a high level is output on the data receiving pin; if the amplitude of the square wave perturbation fundamental frequency calculated by the receiver is less than or equal to the amplitude threshold set internally by the program, it is considered that an invalid information symbol 0 has been received, that is, the target information symbol is determined to be 0, and a low level is output on the data receiving pin.

[0129] By adopting the above method, the target information symbol can be recovered based on the fundamental frequency characteristics of the disturbance frequency ripple. This allows the receiver to obtain the symbol result corresponding to the data to be transmitted simply by making amplitude and frequency domain decisions on the output voltage. The decision basis is clear and suitable for information demodulation in the output scenario of an isolated converter.

[0130] Based on the aforementioned embodiments, further, signal conditioning is performed on the square wave disturbance signal in the output voltage to obtain the disturbance frequency ripple, including: using a DC blocking capacitor to filter out the DC component in the square wave disturbance signal to obtain an AC disturbance ripple; performing signal gain on the AC disturbance ripple to obtain amplified AC disturbance ripple; and using a bandpass filter to filter out out-of-band noise of the amplified AC disturbance ripple to obtain the disturbance frequency ripple.

[0131] In the above processing, the DC blocking capacitor first removes the DC component in the output voltage, so that the AC disturbance ripple is concentrated and retains the AC content related to the information carrying. Then, the signal gain increases the amplitude of the AC content, and the bandpass filter suppresses the interference components of irrelevant frequency bands, finally obtaining the disturbance frequency ripple used for amplitude extraction.

[0132] After adopting the above signal conditioning method, the DC component and out-of-band noise in the square wave disturbance signal are suppressed in sequence, and the target frequency component is preserved and enhanced. Therefore, the extraction accuracy of the fundamental frequency amplitude of the square wave disturbance can be improved, and the identification stability of the information-carrying ripple in the output voltage can be enhanced.

[0133] Based on the aforementioned embodiments, further, determining the disturbance phase shift angle based on the initial information symbols includes: mapping the initial information symbols to square wave disturbance amplitudes, and converting the square wave disturbance amplitudes into disturbance phase shift angles.

[0134] In practical implementation, the mapping relationship can be set as a discrete single-value correspondence, ensuring that the same initial information symbol always receives a fixed square wave disturbance amplitude. Alternatively, it can be set as a segmented correspondence related to the operating state to maintain disturbance identifiability under different load conditions. When converting the square wave disturbance amplitude into a disturbance phase shift angle, it can be constrained by the upper limit of the phase offset within the bridge arm switching cycle to ensure that the resulting disturbance phase shift angle meets the full-bridge drive requirements. In this way, the initial information symbol is stably converted into a disturbance phase shift angle that can be directly used for modulation, providing input for subsequent superposition onto the steady-state phase shift angle to form the corresponding square wave disturbance signal.

[0135] After adopting the above mapping and transformation method, a clear deterministic correlation is established between the initial information symbol and the disturbance phase shift angle, enabling the controller to express the modulation information with unified parameters and effectively convert discrete information into phase quantities suitable for the phase-shifting full-bridge controller. As a result, the subsequent phase superposition process can maintain the consistency of the modulation rules, and the square wave disturbance characteristics in the output voltage are easier for the receiver to extract and identify.

[0136] Next, we will explain how to utilize the information modulation method provided in the embodiments of this application, taking an electric vehicle charging station as an application scenario. Within an electric vehicle charging station, the charging pile transmits electrical energy to the vehicle through a phase-shifting full-bridge converter and transmits charging status and fault information back to the control center via power lines. Simultaneously, it receives control commands such as start charging and stop charging from the control center.

[0137] In one example, the charging pile is 50 meters away from the control center, and the charging power and battery temperature of the vehicle need to be transmitted to the control center in real time. To address the issue of increased bit error rate due to electromagnetic interference in long-distance transmission using traditional RS485 communication, the charging pile control unit acquires the initial information symbols of the data to be transmitted, maps these symbols to square wave disturbance amplitudes, and calculates the corresponding disturbance phase shift angle based on the square wave disturbance amplitude using an amplitude-phase shift angle conversion function. For example, a binary "1" indicates that the battery temperature is too high, and the information symbol "1" is mapped to the disturbance amplitude. and calculate The information symbols are converted into adjustable phase angles using software algorithms.

[0138] After obtaining the disturbance phase shift angle, the charging pile control unit determines the square wave polarity corresponding to the initial information symbol, and on the basis of the phase shift full bridge converter working at the steady-state phase shift angle, the disturbance phase shift angle is superimposed on the steady-state phase shift angle to form a dynamic phase shift angle, in which the phase of the leading bridge arm remains unchanged, and the phase of the lagging bridge arm is adjusted according to the square wave polarity.

[0139] When the square wave disturbance polarity is positive, the PWM drive signal of the lagging bridge arm shifts to the right; when the square wave polarity is negative, the phase of the lagging bridge arm is shifted to the left by the corresponding disturbance phase shift angle, thereby injecting the disturbance information corresponding to the initial information symbol into the dynamic phase shift angle. Based on the dynamic phase shift angle, the conduction sequence of each switch in the phase-shifted full-bridge converter is controlled, so that a square wave disturbance signal with an amplitude corresponding to the dynamic phase shift angle is superimposed on the output voltage ripple, and the phase-shifted full-bridge converter outputs an output voltage containing the square wave disturbance signal corresponding to the information symbol.

[0140] When the control center receives and processes the output voltage of the charging pile, it first filters out the DC component in the square wave disturbance signal through the DC blocking capacitor in the signal conditioning circuit to obtain the AC disturbance ripple. Then, the AC disturbance ripple is amplified by 50 times by the signal gain amplifier to obtain the amplified AC disturbance ripple. Finally, the out-of-band noise in the amplified AC disturbance ripple is filtered out by the 25kHz bandpass filter to obtain the 25kHz disturbance frequency ripple.

[0141] The conditioned signal is then subjected to Discrete Fourier Transform analysis to extract the fundamental frequency amplitude of the square wave disturbance, specifically the 25kHz fundamental frequency amplitude, and compared with a preset amplitude threshold. When the fundamental frequency amplitude of the square wave disturbance is greater than the preset amplitude threshold, the target information symbol is determined to be 1, corresponding to the determination that the battery temperature is too high. When the fundamental frequency amplitude of the square wave disturbance is less than or equal to the preset amplitude threshold, the target information symbol is determined to be 0.

[0142] During transmission, the charging pile's environmental sensing module monitors the fundamental frequency amplitude of the output voltage ripple and background noise in real time, and performs dynamic compensation based on feedback from the receiver. When an increase in transmission distance is detected, such as the distance between the charging pile and the vehicle increasing from 50 meters to 80 meters, causing the fundamental frequency amplitude to fall below the threshold, the disturbance phase shift angle is automatically increased to enhance the square wave disturbance amplitude and compensate for signal attenuation. During dynamic compensation, a proportional-integral (PI) control algorithm is used to adjust the disturbance phase shift angle, matching the disturbance amplitude to the transmission distance. The leading arm phase remains unchanged, while a new dynamic phase shift angle is formed by adjusting the lagging arm phase, ensuring that the signal strength at the receiver is always above the noise threshold.

[0143] Correspondingly, the control center still follows the process of filtering out DC components with DC blocking capacitors, amplifying the signal gain by 50 times, performing 25kHz bandpass filtering, discrete Fourier transform analysis, and threshold decision to restore the target information symbol.

[0144] Throughout the process, the charging pile continues to transmit charging status and fault information back to the control center via the power line, and receives charging start and stop commands issued by the control center.

[0145] In summary, the above method is a novel information modulation strategy proposed for the PWM power transmission characteristics of isolated phase-shifted full-bridge converters.

[0146] Specifically, the above method, by flexibly controlling the amplitude of the square wave perturbation fundamental frequency, can improve the signal strength by appropriately increasing the amplitude of the square wave perturbation fundamental frequency during long-distance information transmission in order to cope with the signal attenuation in the transmission path. This effectively overcomes the signal attenuation problem caused by the transmission distance and ensures that the information can be accurately demodulated at the receiving end.

[0147] Meanwhile, during the isolated power conversion process, reliable information transmission can be achieved while flexibly adjusting the output voltage, expanding the application potential of power information co-modulation in high-power isolation scenarios.

[0148] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.

[0149] Figure 6A schematic diagram of the information modulation device provided in this application is shown below. Figure 6 As shown, the information modulation apparatus provided in this embodiment includes:

[0150] The acquisition module 601 is used to acquire the initial information symbols of the data to be transmitted;

[0151] The determination module 602 is used to determine the disturbance phase shift angle based on the initial information symbols;

[0152] The phase-shift control module 603 is used to superimpose the disturbance phase-shift angle onto the steady-state phase-shift angle of the phase-shift full-bridge converter to obtain the output voltage, wherein the output voltage is the square wave disturbance signal injected corresponding to the initial information symbol;

[0153] The signal conditioning circuit 604 is used to condition the output voltage and extract its amplitude to obtain the target information symbol of the data to be transmitted.

[0154] In one possible embodiment, the phase-shift control module 603 is specifically used for:

[0155] By controlling the phase of the lagging arm of the phase-shifting full-bridge converter, the disturbance phase shift angle is superimposed on the steady-state phase shift angle to obtain the dynamic phase shift angle, wherein the phase of the leading arm of the phase-shifting full-bridge converter remains unchanged;

[0156] Based on the dynamic phase shift angle, the conduction timing of the switching transistors in the phase-shifted full-bridge converter is controlled to obtain the output voltage of the square wave disturbance signal corresponding to the information symbol.

[0157] In one possible embodiment, the phase-shift control module 603 is specifically used for:

[0158] Determine the polarity of the square wave corresponding to the initial information symbol;

[0159] If the square wave polarity is positive, the phase of the lagging bridge arm is shifted to the right to superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifting full-bridge converter, thus obtaining the dynamic phase shift angle.

[0160] If the square wave polarity is negative, the phase of the lagging bridge arm is shifted to the left to superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifting full-bridge converter, thus obtaining the dynamic phase shift angle.

[0161] In one possible embodiment, the signal conditioning circuit 604 is specifically used for:

[0162] Signal conditioning is performed on the square wave disturbance signal in the output voltage to obtain the disturbance frequency ripple;

[0163] Discrete Fourier transform analysis was performed on the perturbation frequency ripple to obtain the fundamental frequency amplitude of the square wave perturbation;

[0164] If the amplitude of the square wave disturbance fundamental frequency is greater than the preset amplitude threshold, the target information symbol is determined to be 1;

[0165] If the amplitude of the square wave disturbance fundamental frequency is less than or equal to the preset amplitude threshold, the target information symbol is determined to be 0.

[0166] In one possible embodiment, the signal conditioning circuit 604 is specifically used for:

[0167] A DC blocking capacitor is used to filter out the DC component in the square wave disturbance signal to obtain the AC disturbance ripple;

[0168] The AC disturbance ripple is amplified to obtain the amplified AC disturbance ripple;

[0169] By using a bandpass filter, the out-of-band noise of the AC disturbance ripple after gain is filtered out, and the disturbance frequency ripple is obtained.

[0170] In one possible embodiment, the determining module 602 is specifically used for:

[0171] The initial information symbols are mapped to square wave disturbance amplitudes, and the square wave disturbance amplitudes are converted into disturbance phase shift angles.

[0172] The information modulation device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0173] It should be noted that the division of the various modules in the above device is merely a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, these modules can be implemented entirely in software via processing element calls; they can be fully implemented in hardware; or some modules can be implemented by processing element calls to software, while others are implemented in hardware. For example, a processing module can be a separate processing element, or it can be integrated into a chip within the device. Alternatively, it can be stored as program code in the device's memory, and its functions can be called and executed by a processing element. The implementation of other modules is similar. Moreover, these modules can be fully or partially integrated together, or they can be implemented independently. The processing element here can be an integrated circuit with signal processing capabilities. During implementation, each step of the above method or each of the above modules can be completed through integrated logic circuits in the hardware of the processor element or through software instructions.

[0174] For example, these modules can be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs). As another example, when a module is implemented using processing element scheduler code, the processing element can be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. Furthermore, these modules can be integrated together as a System-On-a-Chip (SOC).

[0175] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 7 As shown, the electronic device 700 provided in this application embodiment may include: a processor 701, and a memory 702 communicatively connected to the processor, wherein:

[0176] The memory stores instructions that the computer executes;

[0177] The processor executes computer execution instructions stored in memory to implement the method described in the foregoing method embodiments.

[0178] It should be understood that processor 701 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the application can be directly manifested as execution by a hardware processor, or execution by a combination of hardware and software modules within the processor. Memory 702 may include high-speed random access memory (RAM), and may also include non-volatile memory (NVM), such as at least one disk storage device, or a USB flash drive, external hard drive, read-only memory, disk, or optical disc, etc.

[0179] Optionally, the electronic device 700 may also include a communication interface 703. In specific implementations, if the communication interface 703, memory 702, and processor 701 are implemented independently, they can be interconnected via a bus to complete communication. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc., but this does not imply that there is only one bus or one type of bus.

[0180] Optionally, in a specific implementation, if the communication interface 703, memory 702, and processor 701 are integrated on a single chip, then the communication interface 703, memory 702, and processor 701 can communicate through an internal interface.

[0181] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed, are used to implement the methods described in any of the foregoing embodiments.

[0182] It is understood that the computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0183] An exemplary computer-readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the computer-readable storage medium. Of course, the computer-readable storage medium can also be a component of the processor. The processor and the computer-readable storage medium can reside in an ASIC. Alternatively, the processor and the computer-readable storage medium can exist as discrete components in an electronic device.

[0184] The integrated modules implemented as software functional modules described above can be stored in a computer-readable storage medium. These software functional modules, stored in a computer-readable storage medium, include several instructions to cause an electronic device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of this application.

[0185] This application also provides a computer program product, including a computer program that, when executed, implements the method described in any of the foregoing embodiments.

[0186] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0187] It should be further noted that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0188] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0189] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0190] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An information modulation method, characterized in that, include: Obtain the initial information symbols of the data to be transmitted; Based on the initial information symbols, determine the disturbance phase shift angle; The disturbance phase shift angle is superimposed on the steady-state phase shift angle of the phase-shifted full-bridge converter to obtain the output voltage, wherein the output voltage is a square wave disturbance signal injected corresponding to the initial information symbol; The output voltage is conditioned and its amplitude is extracted to obtain the target information symbol of the data to be transmitted.

2. The method according to claim 1, characterized in that, The step of superimposing the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifted full-bridge converter to obtain the output voltage, wherein the output voltage is injected with a square wave disturbance signal corresponding to the initial information symbol, including: By controlling the phase of the lagging arm of the phase-shifting full-bridge converter, the disturbance phase shift angle is superimposed on the steady-state phase shift angle to obtain the dynamic phase shift angle, wherein the phase of the leading arm of the phase-shifting full-bridge converter remains unchanged; Based on the dynamic phase shift angle, the conduction timing of the switching transistors in the phase-shifted full-bridge converter is controlled to obtain the output voltage of the square wave disturbance signal injected with the information symbol.

3. The method according to claim 2, characterized in that, The step of controlling the phase of the lag arm of the phase-shifting full-bridge converter to superimpose the disturbance phase shift angle onto the steady-state phase shift angle to obtain the dynamic phase shift angle includes: Determine the polarity of the square wave corresponding to the initial information symbol; If the square wave polarity is positive, the dynamic phase shift angle is obtained by controlling the phase of the hysteresis bridge arm to shift to the right, so as to superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifting full-bridge converter; If the square wave polarity is negative, the dynamic phase shift angle is obtained by controlling the phase of the hysteresis bridge arm to shift to the left, so as to superimpose the disturbance phase shift angle onto the steady-state phase shift angle of the phase-shifting full-bridge converter.

4. The method according to any one of claims 1 to 3, characterized in that, The step of performing signal conditioning and amplitude extraction on the output voltage to obtain the target information symbol of the data to be transmitted includes: The square wave disturbance signal in the output voltage is conditioned to obtain the disturbance frequency ripple; Discrete Fourier transform analysis was performed on the perturbation frequency ripple to obtain the fundamental frequency amplitude of the square wave perturbation; If the amplitude of the square wave disturbance fundamental frequency is greater than the preset amplitude threshold, the target information symbol is determined to be 1; If the amplitude of the square wave disturbance fundamental frequency is less than or equal to a preset amplitude threshold, the target information symbol is determined to be 0.

5. The method according to claim 4, characterized in that, The step of conditioning the square wave disturbance signal in the output voltage to obtain the disturbance frequency ripple includes: The DC component in the square wave disturbance signal is filtered out using a DC blocking capacitor to obtain the AC disturbance ripple; The AC disturbance ripple is amplified to obtain the amplified AC disturbance ripple; The out-of-band noise of the AC disturbance ripple after gain is filtered out by a bandpass filter to obtain the disturbance frequency ripple.

6. The method according to any one of claims 1 to 3, characterized in that, The step of determining the disturbance phase shift angle based on the initial information symbols includes: The initial information symbols are mapped to square wave disturbance amplitudes, and the square wave disturbance amplitudes are converted into the disturbance phase shift angle.

7. An information modulation device, characterized in that, include: The acquisition module is used to acquire the initial information symbols of the data to be transmitted; The determination module is used to determine the disturbance phase shift angle based on the initial information symbols; A phase-shift control module is used to superimpose the disturbance phase-shift angle onto the steady-state phase-shift angle of the phase-shift full-bridge converter to obtain an output voltage, wherein the output voltage is a square wave disturbance signal injected corresponding to the initial information symbol; The signal conditioning circuit is used to condition the output voltage and extract its amplitude to obtain the target information symbol of the data to be transmitted.

8. An electronic device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-6.

10. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method described in any one of claims 1-6.

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