A signal transmission method, device and system

Abstract

The application provides a signal transmission method, device and system, which can be applied to the field of power supply. The method is applied to a signal transmission system comprising a first control module, and comprises: converting a first output signal of a power conversion module into a second output signal according to a proportion by the first control module; dividing the second output signal into a plurality of data segments based on a plurality of threshold values by the first control module; performing an encoding operation on the plurality of data segments respectively by the first control module to obtain a plurality of data frames; and determining a feedback signal based on the plurality of data segments or the plurality of data frames by the first control module, wherein the feedback signal comprises a data frame comprising a first data segment, the first data segment comprises a binary number with a change frequency greater than or equal to a first threshold value within a unit time, and the first threshold value is a threshold value with the largest value among the plurality of threshold values.

Description

Technical Field

[0001] This invention relates to the field of power supply, and more particularly to a signal transmission method, apparatus, and system. Background Technology

[0002] To achieve stable output signals (including at least one of output current, output voltage, and output power) of the power converter, closed-loop feedback control is typically used on the primary side. The primary-side integrated control includes a secondary-side control module and a primary-side control module. The secondary-side control module is responsible for acquiring the power converter's output signal and generating a feedback signal based on it. The primary-side control module integrates most of the circuitry and uses the feedback signal provided by the secondary-side control module to calculate and generate control signals, which are then sent to the power converter to adjust its output signal.

[0003] Existing secondary-side control modules use a compensation signal obtained by compensating the output signal of the power converter, or an error signal between the output signal of the power converter and a reference signal, as feedback signals. These feedback signals are transmitted to the primary-side control module in analog form via optical coupler transmission or a dedicated channel to generate control signals. However, the amount of information that can be transmitted via optical coupler transmission or a dedicated channel is limited, and the advantages of digital control based on complex algorithms cannot be fully utilized. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a signal transmission method, apparatus, and system that can solve the problem of limited information transmission through optical couplers or dedicated channels, and can support subsequent digital control operations based on complex algorithms.

[0005] In a first aspect, a signal transmission method is provided, applied to a power control system, the power control system including a first control module, the signal transmission method comprising:

[0006] The first control module described above converts the first output signal of the power conversion module into a second output signal proportionally.

[0007] The first control module divides the second output signal into multiple data segments based on multiple thresholds;

[0008] The first control module described above performs encoding operations on the multiple data segments respectively to obtain multiple data frames;

[0009] The first control module determines the feedback signal based on the multiple data segments or multiple data frames mentioned above;

[0010] Wherein, the second output signal is a digital signal, the first output signal is an analog signal, each of the plurality of data frames includes a payload, which is used to carry the corresponding data segment, which belongs to the plurality of data segments, the feedback signal includes a data frame containing a first data segment, which belongs to the plurality of data frames, the first data segment belongs to the plurality of data segments, the first data segment includes a binary number whose number of changes per unit time is greater than or equal to a first threshold, and the first threshold is the threshold with the largest value among the plurality of thresholds.

[0011] In the above scheme, the output signal of the power conversion module is converted from an analog signal to a digital signal, and then encoded into multiple data frames. The data frame containing the first data segment is selected from these multiple data frames as a feedback signal to generate the control signal. Therefore, transmitting only a portion of the data frames achieves the same amount of information, reducing the amount of data transmitted and thus lowering the transmission rate. Furthermore, the feedback signal is transmitted in digital form, which, compared to optocoupler transmission or dedicated channel transmission, directly provides data support for subsequent digital control based on complex algorithms and ensures the ability to increase the amount of data and information transmitted.

[0012] In some possible implementations, the first control module encodes the multiple data segments to obtain multiple data frames, including:

[0013] The first control module encodes the multiple data segments to obtain the multiple data frames, including the first data frame.

[0014] In the above scheme, the encoding operation can process multiple data segments of the second output signal and arrange their data formats to obtain multiple data frames, including the first data frame.

[0015] In some possible implementations, the first data frame includes a first frame header identifier and a first payload, wherein the first frame header identifier is used to distinguish the plurality of data frames, and the first payload is used to carry a corresponding data segment, which belongs to the plurality of data segments.

[0016] In the above scheme, the first data frame obtained through encoding can distinguish data segments with different change frequencies. Therefore, the first data frame to be transmitted can be selected according to the requirements, thereby improving data transmission efficiency.

[0017] In some possible implementations, the first control module encodes the multiple data segments respectively to obtain the multiple data frames, including the first data frame, comprising:

[0018] The first control module encodes the multiple data segments and protection signals to obtain the multiple data frames, including the first data frame and the second data frame.

[0019] In the above scheme, by encoding multiple data segments together with the protection signal, it is possible to process multiple data segments of the second output signal and the protection signal and arrange their data formats, thereby obtaining different types of data frames such as data frames containing data segments and data frames containing protection signals.

[0020] In some possible implementations, the first control module encodes the multiple data segments to obtain multiple data frames, including:

[0021] The first control module encodes the multiple data segments and protection signals to obtain the multiple data frames, including the second data frame.

[0022] In the above scheme, by encoding multiple data segments together with the protection signal, it is possible to process multiple data segments of the second output signal and the protection signal and arrange their data formats, thereby obtaining multiple data frames including the second data frame.

[0023] In some possible implementations, the second data frame includes a second frame header identifier and a second payload. The second frame header identifier is used to distinguish the multiple data frames, and the second payload is used to carry the corresponding data segment and the protection signal. The data segment belongs to the multiple data segments.

[0024] In the above scheme, the second data frame obtained through the encoding operation contains the corresponding data segment and the protection signal. Therefore, when transmitting the feedback signal in the subsequent process, the data segment representing the second output signal information and the protection signal can be transmitted through the same interface, thereby unifying the data transmission interface, reducing the number of data transmission channels, and reducing the hardware resources for data transmission.

[0025] In some possible implementations, the first control module encodes the multiple data segments respectively to obtain the multiple data frames, including the first data frame, comprising:

[0026] The first control module encodes the multiple data segments and protection signals to obtain the multiple data frames, including the first data frame, and the third data frame.

[0027] In the above scheme, by encoding multiple data segments together with the protection signal, it is possible to process multiple data segments of the second output signal and the protection signal and arrange their data formats, thereby obtaining different types of data frames such as data frames containing data segments and data frames containing protection signals.

[0028] In some possible implementations, the feedback signal may further include a fourth data frame, which belongs to the plurality of data frames or the third data frame. The payload of the fourth data frame carries content different from the payload of the data frames with the same frame header identifier in the third output signal. The sampling time of the third output signal is earlier than the sampling time of the second output signal.

[0029] In the above scheme, the feedback signal only includes the data frame containing the first data segment and the data frame whose content carried by the net payload has changed. Compared with the feedback signal that includes all data frames, it can reduce the number of data frames in the feedback signal while transmitting the same amount of information, thereby reducing the amount of data transmitted and lowering the requirements for data transmission rate.

[0030] In some possible implementations, the fourth data frame is obtained by the first control module comparing the second output signal with the third output signal.

[0031] In the above scheme, the fourth data frame is determined by comparing the second output signal with the third output signal, thereby determining the feedback signal, which is simple to operate.

[0032] In some possible implementations, the fourth data frame is obtained by the first control module comparing multiple data frames of the second output signal with multiple data frames of the third output signal.

[0033] In the above scheme, the fourth data frame is determined by comparing multiple data frames of the second output signal with multiple data frames of the third output signal, thereby determining the feedback signal, which is simple to operate.

[0034] In some possible implementations, the fourth data frame is obtained by the first control module comparing multiple data segments of the second output signal with multiple data segments of the third output signal.

[0035] In the above scheme, the fourth data frame is determined by comparing multiple data segments of the second output signal with multiple data segments of the third output signal, thereby determining the feedback signal, which is simple to operate.

[0036] In some possible implementations, the fourth data frame is obtained by the first control module comparing multiple data segments of the second output signal with multiple data segments of the third output signal, and comparing the protection signal corresponding to the second output signal with the protection signal corresponding to the third output signal.

[0037] In the above scheme, the fourth data frame is determined by comparing multiple data segments of the second output signal with multiple data segments of the third output signal, and by comparing the protection signal corresponding to the second output signal with the protection signal corresponding to the third output signal, and then the feedback signal is determined. The operation is simple.

[0038] In some possible implementations, the third data frame includes a third frame header identifier and a third payload, wherein the third frame header identifier is used to distinguish the plurality of data frames and the third data frame, and the third payload is used to carry a protection signal.

[0039] In the above scheme, the third data frame obtained through encoding can distinguish data segments with different change frequencies and different protection signals. Therefore, the third data frame to be transmitted can be selected according to requirements, thereby improving data transmission efficiency. On the other hand, encoding can obtain a first data frame containing data segments and a third data frame containing protection signals. When transmitting feedback signals subsequently, both the first and third data frames can be transmitted using the same interface, achieving a unified data transmission interface, thereby reducing the number of data transmission channels and reducing the hardware resources required for data transmission.

[0040] In some possible implementations, the power control system further includes a second control module, and the method further includes:

[0041] The second control module receives the feedback signal sent by the first control module.

[0042] The second control module decodes the feedback signal to obtain the second output signal.

[0043] The second control module generates a control signal for controlling the power conversion module based on the second output signal.

[0044] In the above scheme, the feedback signal is transmitted to the second control module in the form of a digital signal to generate a control signal. Compared with optical coupler transmission or dedicated channel transmission, it can not only directly provide data support for subsequent digital control work based on complex algorithms, but also ensure the increase of the amount of transmitted data and information.

[0045] Secondly, a signal transmission device is provided, comprising: a first module,

[0046] The first module described above is used to convert the first output signal of the power conversion device into a second output signal according to a ratio;

[0047] The first module described above is also used to divide the second output signal into multiple data segments based on multiple thresholds;

[0048] The first module described above is also used to encode the multiple data segments respectively to obtain multiple data frames;

[0049] The first module described above is also used to determine the feedback signal based on the multiple data segments or multiple data frames described above;

[0050] Wherein, the second output signal is a digital signal, the first output signal is an analog signal, each of the plurality of data frames includes a payload, which is used to carry the corresponding data segment, which belongs to the plurality of data segments, the feedback signal includes a data frame containing a first data segment, which belongs to the plurality of data frames, the first data segment belongs to the plurality of data segments, the first data segment includes a binary number whose number of changes per unit time is greater than or equal to a first threshold, and the first threshold is the threshold with the largest value among the plurality of thresholds.

[0051] In some possible implementations, the first module is specifically used to: encode the multiple data segments respectively to obtain the multiple data frames including the first data frame.

[0052] In some possible implementations, the first data frame includes a first frame header identifier and a first payload, wherein the first frame header identifier is used to distinguish the plurality of data frames, and the first payload is used to carry a corresponding data segment, which belongs to the plurality of data segments.

[0053] In some possible implementations, the first module is specifically used to: encode the multiple data segments and the protection signal to obtain the multiple data frames including the first data frame and the second data frame.

[0054] In some possible implementations, the first module is specifically used to: encode the multiple data segments and protection signals to obtain the multiple data frames, including the second data frame.

[0055] In some possible implementations, the second data frame includes a second frame header identifier and a second payload. The second frame header identifier is used to distinguish the multiple data frames, and the second payload is used to carry the corresponding data segment and the protection signal. The data segment belongs to the multiple data segments.

[0056] In some possible implementations, the first module is specifically used to: encode the multiple data segments and the protection signal to obtain the multiple data frames including the first data frame and the third data frame.

[0057] In some possible implementations, the feedback signal may further include a fourth data frame, which belongs to the plurality of data frames or the third data frame. The payload of the fourth data frame carries content different from the payload of the data frames with the same frame header identifier in the third output signal. The sampling time of the third output signal is earlier than the sampling time of the second output signal.

[0058] In some possible implementations, the fourth data frame is obtained by the first module comparing the second output signal with the third output signal.

[0059] In some possible implementations, the fourth data frame is obtained by the first module comparing multiple data frames of the second output signal with multiple data frames of the third output signal.

[0060] In some possible implementations, the fourth data frame is obtained by the first module comparing multiple data segments of the second output signal with multiple data segments of the third output signal.

[0061] In some possible implementations, the fourth data frame is obtained by the first module comparing multiple data segments of the second output signal with multiple data segments of the third output signal, and comparing the protection signal corresponding to the second output signal with the protection signal corresponding to the third output signal.

[0062] In some possible implementations, the third data frame includes a third frame header identifier and a third payload, wherein the third frame header identifier is used to distinguish the plurality of data frames and the third data frame, and the third payload is used to carry a protection signal.

[0063] In some possible implementations, the signal transmission device further includes a second module.

[0064] The second module is used to receive the feedback signal sent by the first module.

[0065] The second module is also used to decode the feedback signal to obtain the second output signal.

[0066] The second module is also used to generate a control signal for controlling the power conversion device based on the second output signal.

[0067] Thirdly, a signal transmission system is provided, including: a signal transmission device and a power conversion device.

[0068] The aforementioned signal transmission device is used to perform the method as described in any of the first aspects;

[0069] The aforementioned power conversion device is used to generate the first output signal. Attached Figure Description

[0070] To more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the accompanying drawings used in the embodiments of the present invention or the background art will be described below.

[0071] Figure 1A This is a schematic diagram of the structure of a signal transmission system provided in this application;

[0072] Figure 1B This is a schematic diagram of another signal transmission system provided in this application;

[0073] Figure 1C This is a schematic diagram of another signal transmission system provided in this application;

[0074] Figure 1D This is a schematic diagram of another signal transmission system provided in this application;

[0075] Figure 2 This is a flowchart illustrating a signal transmission method provided in this application;

[0076] Figure 3A This is a schematic diagram of a second output signal generation method provided in this application;

[0077] Figure 3B This is a schematic diagram of another method for generating a second output signal provided in this application;

[0078] Figure 4A This is a schematic diagram of a first data frame provided in this application;

[0079] Figure 4B This is a schematic diagram of another first data frame provided in this application;

[0080] Figure 4C This is a schematic diagram of a second data frame provided in this application;

[0081] Figure 4D This is a schematic diagram of another first data frame provided in this application;

[0082] Figure 4E This is a schematic diagram of another first data frame provided in this application;

[0083] Figure 4FThis is a schematic diagram of a third data frame provided in this application;

[0084] Figure 5 This is a schematic diagram of the structure of a signal transmission device provided in this application;

[0085] Figure 6 This is a schematic diagram of the structure of a signal transmission system provided in this application. Detailed Implementation

[0086] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0087] See Figure 1A and Figure 1B , Figure 1A This is a schematic diagram of the structure of a signal transmission system provided in this application. Figure 1B This is a schematic diagram of another signal transmission system provided in this application. Figure 1A and Figure 1B In this system, the signal transmission system 10 includes a first control module 11 and a second control module 12. The first control module 11 acquires the first output signal 14 of the power conversion device 13, converts the first output signal 14 into a feedback signal 15, and then sends the feedback signal 15 to the second control module 12. The second control module 12 receives the feedback signal 15 sent by the first control module 11, generates a control signal 16 based on the feedback signal 15, and then sends the control signal 16 to the power conversion device 13. The power conversion device 13 receives the control signal 16 sent by the second control module 12 and converts the input signal 17 into a new output signal based on the control signal 16.

[0088] The connection relationship and signal transmission process between the first control module 11, the second control module 12, and the power conversion device 13 can include at least the following two methods:

[0089] like Figure 1AAs shown, in the first method, the connection relationship between the first control module 11, the second control module 12, and the power conversion device 13 is as follows: the second terminal 112 of the first control module 11 is connected to the third terminal 133 of the power conversion device 13; the first terminal 111 of the first control module 11 is connected to the second terminal 122 of the second control module 12; and the first terminal 121 of the second control module 12 is connected to the second terminal 132 of the power conversion device 13. Therefore, the signal transmission process between the first control module 11, the second control module 12, and the power conversion device 13 is as follows: the first control module 11 receives the first output signal 14 from the third terminal 133 of the power conversion device 13 through its second terminal 112; after converting the first output signal 14 into a feedback signal 15, it transmits the feedback signal 15 to the second terminal 122 of the second control module 12 through its first terminal 111. The second control module 12 receives the feedback signal 15 through its second terminal 122. Based on the feedback signal 15, it generates a control signal 16 and transmits it to the second terminal 132 of the power conversion device 13 through its first terminal 121. The power conversion device 13 receives the control signal 16 through its second terminal 132, converts the input signal 17 received through its first terminal 131 into a new output signal based on the control signal 16, and outputs the new output signal through its third terminal 133.

[0090] like Figure 1BAs shown, in the second method, the connection relationship between the first control module 11, the second control module 12, and the power conversion device 13 is as follows: the second terminal 112 of the first control module 11 is connected to the third terminal 133 of the power conversion device 13; the first terminal 111 of the first control module 11 is connected to the second terminal 182 of the signal isolation module 18; the first terminal 181 of the signal isolation module 18 is connected to the second terminal 122 of the second control module 12; and the first terminal 121 of the second control module 12 is connected to the second terminal 132 of the power conversion device 13. The signal isolation module 18 is used to transmit feedback signals and to achieve insulation between the first control module 11 and the second control module 12, such as a digital isolator or optocoupler. Therefore, the signal transmission process between the first control module 11, the second control module 12, and the power conversion device 13 is as follows: The first control module 11 receives the first output signal 14 from the second terminal 132 of the power conversion device 13 through its second terminal 112, converts the first output signal 14 into a feedback signal 15, and then transmits the feedback signal 15 to the second terminal 182 of the signal isolation module 18 through its first terminal 111. The signal isolation module 18 receives the feedback signal 15 through its second terminal 182 and transmits the feedback signal 15 to the second terminal 122 of the second control module 12 through its first terminal 181. The second control module 12 receives the feedback signal 15 through its second terminal 122, generates a control signal 16 based on the feedback signal 15, and then transmits the control signal 16 to the first terminal 131 of the power conversion device 13 through its first terminal 121. The power conversion device 13 receives the control signal 16 through the third terminal 133 of the power conversion device 13, and converts the input signal 17 received through the first terminal 131 of the power conversion device 13 into a new output signal based on the control signal 16, and outputs the new output signal through the second terminal 132 of the power conversion device 13.

[0091] See Figure 1C and Figure 1D , Figure 1C This is a schematic diagram of another signal transmission system provided in this application. Figure 1D This is a schematic diagram of another signal transmission system provided in this application. Figure 1C and Figure 1DIn this system, the signal transmission system 10 includes a first control module 11, a second control module 12, and a power conversion module 19. The first control module 11 acquires a first output signal 14 from the power conversion module 19, converts the first output signal 14 into a feedback signal 15, and then sends the feedback signal 15 to the second control module 12. The second control module 12 receives the feedback signal 15 from the first control module 11, generates a control signal 16 based on the feedback signal 15, and then sends the control signal 16 to the power conversion module 19. The power conversion module 19 receives the control signal 16 from the second control module 12 and converts the input signal 17 into a new output signal based on the control signal 16.

[0092] The connection relationship and signal transmission process between the first control module 11, the second control module 12, and the power conversion module 19 can include at least the following two methods:

[0093] like Figure 1C As shown, in the first method, the connection relationship between the first control module 11, the second control module 12, and the power conversion module 19 is as follows: the second terminal 112 of the first control module 11 is connected to the third terminal 193 of the power conversion module 19; the first terminal 111 of the first control module 11 is connected to the second terminal 122 of the second control module 12; and the first terminal 121 of the second control module 12 is connected to the second terminal 192 of the power conversion module 19. Therefore, the signal transmission process between the first control module 11, the second control module 12, and the power conversion module 19 is as follows: the first control module 11 receives the first output signal 14 from the third terminal 193 of the power conversion module 19 through its second terminal 112; after converting the first output signal 14 into a feedback signal 15, it transmits the feedback signal 15 to the second terminal 122 of the second control module 12 through its first terminal 111. The second control module 12 receives the feedback signal 15 through its second terminal 122. After generating a control signal 16 based on the feedback signal 15, it transmits the control signal 16 to the second terminal 192 of the power conversion module 19 through its first terminal 121. The power conversion module 19 receives the control signal 16 through its second terminal 192, converts the input signal 17 received through its first terminal 191 into a new output signal based on the control signal 16, and outputs the new output signal through its third terminal 193.

[0094] like Figure 1DAs shown, in the second method, the connection relationship between the first control module 11, the second control module 12, and the power conversion module 19 is as follows: the second terminal 112 of the first control module 11 is connected to the third terminal 193 of the power conversion module 19; the first terminal 111 of the first control module 11 is connected to the second terminal 182 of the signal isolation module 18; the first terminal 181 of the signal isolation module 18 is connected to the second terminal 122 of the second control module 12; and the first terminal 121 of the second control module 12 is connected to the second terminal 192 of the power conversion module 19. The signal isolation module 18 is used to transmit feedback signals and to achieve insulation between the first control module 11 and the second control module 12, such as a digital isolator, optocoupler, etc. Therefore, the signal transmission process between the first control module 11, the second control module 12, and the power conversion module 19 is as follows: The first control module 11 receives the first output signal 14 from the second terminal 192 of the power conversion module 19 through its second terminal 112. After converting the first output signal 14 into a feedback signal 15, the first control module 11 transmits the feedback signal 15 to the second terminal 182 of the signal isolation module 18 through its first terminal 111. The signal isolation module 18 receives the feedback signal 15 through its second terminal 182 and transmits it to the second terminal 122 of the second control module 12 through its first terminal 181. The second control module 12 receives the feedback signal 15 through its second terminal 122, generates a control signal 16 based on the feedback signal 15, and then transmits the control signal 16 to the first terminal 191 of the power conversion module 19 through its first terminal 121. The power conversion module 19 receives the control signal 16 through its third terminal 193. Based on the control signal 16, it converts the input signal 17 received through the first terminal 191 of the power conversion module 19 into a new output signal and outputs the new output signal through the second terminal 192 of the power conversion module 19.

[0095] In some possible implementations, the power conversion device 13 or power conversion module 19 described above can be a DC-DC converter, a DC-AC converter, an AC-DC converter, or an AC-AC converter. A DC-DC converter is a device that converts a DC power supply of one voltage level to a DC power supply of another voltage level, including non-isolated DC-DC converters and isolated DC-DC converters. A DC-AC converter is a device that converts a DC power supply of one voltage level to an AC power supply within a certain voltage range, such as an inverter. An AC-DC converter is a device that converts an AC power supply within a certain voltage range to a DC power supply of one voltage level, such as a rectifier. An AC-AC converter is a device that converts an AC power supply within a certain voltage range to an AC power supply within another voltage range, such as a transformer.

[0096] Based on the aforementioned signal transmission system, the following section describes a signal transmission method provided in this application.

[0097] See Figure 2 , Figure 2 This is a schematic flowchart of a signal transmission method provided in this application. Figure 2 As shown, the signal transmission method provided in this application includes:

[0098] S201: The first control module acquires the first output signal of the power conversion module.

[0099] The first control module can be Figure 1A The first control module 11 in the signal transmission system 10, and the power conversion module can be Figure 1A The power conversion device 13 in the signal transmission system 10. Alternatively, the first control module can be... Figure 1B The first control module 11 in the signal transmission system 10, and the power conversion module can be Figure 1B The power conversion device 13 in the signal transmission system 10. Alternatively, the first control module can be... Figure 1C The first control module 11 in the signal transmission system 10, and the power conversion module can be Figure 1CThe power conversion module 19 in the signal transmission system 10. Alternatively, the first control module can be... Figure 1D The first control module 11 in the signal transmission system 10, and the power conversion module can be Figure 1D The power conversion module 19 in the signal transmission system 10.

[0100] In some possible implementations, a power conversion module is used to convert one form of input power into another, and outputs the other form of power as the first output signal. The first output signal of the power conversion module is an analog signal; therefore, it represents information in terms of continuously changing voltage, current, or power. One or more of the amplitude, frequency, phase, and value of the first output signal change continuously with time, or the voltage, current, or power can have multiple different values ​​within a continuous time interval, or it can present an arbitrary value at any instant. For example, if the power conversion module is a DC-DC converter, it uses inductors, capacitors, and other components to repeatedly switch on and off, converting DC voltage, current, or power into high-frequency square wave voltage, current, or power, and then rectifying and smoothing it into DC voltage, DC current, or DC power for output. In this case, the first output signal of the power conversion module is DC voltage, DC current, or DC power.

[0101] In some possible implementations, the input terminal of the first control module is connected to the output terminal of the power conversion module, so that the first output signal flows out from the output terminal of the power conversion module and flows back into the first control module from its input terminal, thereby enabling the first control module to acquire the first output signal from the power conversion module. The input terminal of the first control module can be... Figure 1A The second terminal 112 of the first control module 11 in the signal transmission system 10, and the output terminal of the power conversion module can be Figure 1A The third terminal 133 of the power conversion device 13 in the signal transmission system 10 can be the first output signal. Figure 1A The first output signal 14 in the signal transmission system 10. Alternatively, the input terminal of the first control module can be... Figure 1B The second terminal 112 of the first control module 11 in the signal transmission system 10, and the output terminal of the power conversion module can be Figure 1B The third terminal 133 of the power conversion device 13 in the signal transmission system 10 can be the first output signal. Figure 1B The first output signal 14 in the signal transmission system 10. Alternatively, the input terminal of the first control module can be... Figure 1C The second terminal 112 of the first control module 11 in the signal transmission system 10, and the output terminal of the power conversion module can be Figure 1CThe third terminal 193 of the power conversion module 19 in the signal transmission system 10 can be the first output signal. Figure 1C The first output signal 14 in the signal transmission system 10. Alternatively, the input terminal of the first control module can be... Figure 1D The second terminal 112 of the first control module 11 in the signal transmission system 10, and the output terminal of the power conversion module can be Figure 1D The third terminal 193 of the power conversion module 19 in the signal transmission system 10 can be the first output signal. Figure 1D The first output signal 14 in the signal transmission system 10.

[0102] S202: The first control module converts the first output signal of the power conversion module into the second output signal according to a ratio.

[0103] After receiving the first output signal from the power conversion module, the first control module generates a second output signal based on the first output signal. The generation of the second output signal by the first control module can include at least two of the following methods:

[0104] In the first method, the first control module directly converts the first output signal into the second output signal, that is, it converts the first output signal into the second output signal according to a specific ratio of 100%. The following uses a DC voltage as an example to explain the generation process of the second output signal.

[0105] See Figure 3A , Figure 3A This is a schematic diagram of a second output signal generation method provided in this application. For example... Figure 3A As shown, the first control module 11 includes an analog-to-digital converter (ADC) 111, which converts the first output signal 14 into a second output signal 20. Therefore, the second output signal 20 is a digital signal, representing information using discrete numerical values. Specifically, the third terminal 313 of the power conversion module 31 is connected to the input terminal 1111 of the ADC 111, allowing the first output signal 14 to flow out from the third terminal 313 of the power conversion module 31 and into the input terminal 1111 of the ADC 111. After passing through the ADC 111, the second output signal 20 is obtained at the output terminal 1112 of the ADC 111. The first control module 11 can be... Figure 1A The first control module 11 in the signal transmission system 10, the first output signal 14 can be Figure 1A The first output signal 14 in the signal transmission system 10. Alternatively, the first control module 11 can be... Figure 1BThe first control module 11 in the signal transmission system 10, the first output signal 14 can be Figure 1B The first output signal 14 in the signal transmission system 10. Alternatively, the first control module 11 can be... Figure 1C The first control module 11 in the signal transmission system 10, the first output signal 14 can be Figure 1C The first output signal 14 in the signal transmission system 10. Alternatively, the first control module 11 can be... Figure 1D The first control module 11 in the signal transmission system 10, the first output signal 14 can be Figure 1D The first output signal 14 in the signal transmission system 10.

[0106] In the second method, the first control module first reduces the first output signal proportionally, and then converts the reduced first output signal into a second output signal. That is, the first output signal is converted into a second output signal according to a ratio ranging from [0% to 100%). The specific value of the ratio can be determined based on the parameters of the power conversion module, the parameters of the first control module, or user requirements. The following example uses a DC voltage as the first output signal to illustrate the generation process of the second output signal.

[0107] See Figure 3B , Figure 3B This is a schematic diagram of another method for generating the second output signal provided in this application. For example... Figure 3BAs shown, the first control module 11 includes an analog-to-digital converter 111 and a voltage divider module 112. The voltage divider module 112 includes a first voltage divider resistor 113 and a second voltage divider resistor 114. The proportion of the resistance value of the first voltage divider resistor 113 in the sum of the resistance values ​​of the first voltage divider resistor 113 and the second voltage divider resistor 114 is a specific value representing the reduction ratio of the first output signal 14. The first control module 11 first uses the voltage divider module 112 to proportionally reduce the first output signal 14 to obtain a reduced first output signal 141, and then uses the analog-to-digital converter 111 to convert the reduced first output signal 141 into a second output signal 20. Specifically, the third terminal 313 of the power conversion module 31 is connected to the input terminal 1131 of the first voltage divider resistor 113, the output terminal 1132 of the first voltage divider resistor 113 is connected to the input terminal 1141 of the second voltage divider resistor 114, the output terminal 1142 of the second voltage divider resistor 114 is grounded, and the common terminal 1132 / 1141 of the first voltage divider resistor 113 and the second voltage divider resistor 114 is connected to the input terminal 1111 of the analog-to-digital converter 111 as a proportional signal acquisition terminal, so that the first output signal 14 flows out from the third terminal 313 of the power conversion module 31 and flows in from the input terminal 1131 of the first voltage divider resistor 113. After passing through the first voltage divider resistor 113, the reduced first output signal 141 is obtained at the proportional signal acquisition terminal 1132 / 1141. The reduced first output signal 141 flows in from the input terminal 1111 of the analog-to-digital converter 111 and the second output signal 20 is obtained at the output terminal 1112 of the analog-to-digital converter 111. The first control module 11 can be Figure 1A The first control module 11 in the signal transmission system 10, the first output signal 14 can be Figure 1A The first output signal 14 in the signal transmission system 10, the power conversion module 31 can be Figure 1A The power conversion device 13 in the signal transmission system 10, the third terminal 313 of the power conversion module 31 can be Figure 1A The third terminal 133 of the power conversion device 13 in the signal transmission system 10. Alternatively, the first control module 11 can be... Figure 1B The first control module 11 in the signal transmission system 10, the first output signal 14 can be Figure 1B The first output signal 14 in the signal transmission system 10, the power conversion module 31 can be Figure 1B The power conversion device 13 in the signal transmission system 10, the third terminal 313 of the power conversion module 31 can be Figure 1B The third terminal 133 of the power conversion device 13 in the signal transmission system 10. Alternatively, the first control module 11 can be... Figure 1C The first control module 11 in the signal transmission system 10, the first output signal 14 can be Figure 1CThe first output signal 14 in the signal transmission system 10, the power conversion module 31 can be Figure 1C In the signal transmission system 10, the power conversion module 19, the third terminal 313 of the power conversion module 31 can be... Figure 1C The third terminal 193 of the power conversion module 19 in the signal transmission system 10. Alternatively, the first control module 11 can be... Figure 1D The first control module 11 in the signal transmission system 10, the first output signal 14 can be Figure 1D The first output signal 14 in the signal transmission system 10, the power conversion module 31 can be Figure 1D In the signal transmission system 10, the power conversion module 19, the third terminal 313 of the power conversion module 31 can be... Figure 1D The third terminal 193 of the power conversion module 19 in the signal transmission system 10.

[0108] It should be understood that the type of the first output signal and the structure of the first control module are merely examples and are not intended as specific limitations.

[0109] S203: The first control module divides the second output signal into multiple data segments based on multiple thresholds.

[0110] The first control module divides the second output signal into multiple data segments by comparing the number of changes in the binary number in the second output signal per unit time with a threshold.

[0111] During normal operation of the power conversion module, the number of changes in the binary numbers with different weights in the second output signal per unit time depends on the range of changes in the value of the second output signal. For a second output signal represented by a multi-bit binary number, the higher the weight of the binary number, the fewer changes it makes per unit time; conversely, the lower the weight of the binary number, the more changes it makes per unit time. The leftmost bit of the multi-bit binary number is the highest weight, and correspondingly, the rightmost bit is the lowest weight. The range of changes in the value of the second output signal depends on the range of continuous changes in one or more of the amplitude, frequency, phase, and magnitude of the first output signal over time. If the range of changes in one or more of the amplitude, frequency, phase, and magnitude of the first output signal over time is small, then the range of changes in the value of the second output signal over time will also be small.

[0112] The following example uses the comparison of the number of changes of the binary number in the second output signal per unit time with the first threshold to divide the second output signal into two data segments, and then describes in detail the process of dividing the second output signal into multiple data segments based on multiple thresholds.

[0113] Specifically, the first control module determines the positions of binary numbers whose number of changes per unit time is greater than or equal to a first threshold as low-weight bits, and the positions of binary numbers whose number of changes per unit time is less than the first threshold as high-weight bits. This forms the low-weight and high-weight binary numbers in the second output signal. All low-weight binary numbers are used as the first data segment in the second output signal, and all high-weight binary numbers are used as the second data segment. The specific value of the first threshold can be determined according to the parameters of the power conversion module or user requirements. For example, if the ADC output format is a 10-bit binary number, that is, the second output signal is represented by a 10-bit binary number, and assuming the first threshold is 5, and one minute is the unit time, then the first control module will determine the positions of binary numbers whose number of changes per minute is greater than or equal to 5 as low-weight bits, and the positions of binary numbers whose number of changes per minute is less than 5 as high-weight bits. If the first output signal of the power conversion module is a DC voltage, and the reference voltage value is 2000 volts, that is, the value of the first output signal under ideal conditions, and the DC voltage variation range is within ±5%, then six bits of the second output signal are low-weight binary numbers and four bits are high-weight binary numbers. Therefore, the six low-weight binary numbers in the second output signal are used as the first data segment, and the four high-weight binary numbers are used as the second data segment.

[0114] Similarly, the first control module can divide the second output signal into three data segments by comparing the number of changes of the binary number in the second output signal per unit time with the first threshold and the second threshold, where the first threshold is greater than the second threshold; by comparing the number of changes of the binary number in the second output signal per unit time with the first threshold, the second threshold, and the third threshold, the second output signal can be divided into four data segments, where the first threshold is greater than the second threshold, the second threshold is greater than the third threshold, and so on. Therefore, the first control module can determine multiple data segments in the second output signal based on multiple thresholds.

[0115] S204: The first control module performs encoding operations on multiple data segments to obtain multiple data frames.

[0116] The first control module encodes multiple data segments of the second output signal to obtain multiple data frames of the second output signal, which can include at least the following three encoding methods:

[0117] In the first encoding method, the first control module encodes multiple data segments of the second output signal to obtain multiple data frames, including a first data frame. The first data frame includes a first frame header identifier and a first payload. The first frame header identifier is used to distinguish the multiple data frames, including the first data frame, and the first payload is used to carry the corresponding data segments.

[0118] The following section describes the process of using the first encoding method to encode the two data segments to obtain two first data frames, based on the division of the second output signal into two data segments using the first threshold in step S203 above.

[0119] See Figure 4A and Figure 4B , Figure 4A This is a schematic diagram of a first data frame provided in this application. Figure 4B This is a schematic diagram of another first data frame provided in this application. For example... Figure 4A As shown, the second output signal is represented by a 10-bit binary number. The six least significant bits of the second output signal are used as the first data segment. This first data segment is encoded to obtain the first data frame containing the first data segment. The first data frame containing the first data segment consists of a seven-bit binary number. The seventh bit is the first frame header identifier; a value of 0 indicates that the data frame contains the first data segment. The remaining six bits are the first payload, used to carry the first data segment. (The text repeats itself here.) Figure 4B As shown, the four high-weight binary numbers in the second output signal are used as the second data segment. The second data segment is encoded to obtain the first data frame containing the second data segment. The first data frame containing the second data segment consists of a seven-bit binary number. The seventh bit is the first frame header identifier bit, with a value of 1 indicating that the data frame is the first data frame containing the second data segment. The remaining six bits are the first payload, used to carry the second data segment. Bits six through three represent the second data segment, while bits two and one are null.

[0120] In the second encoding method, the first control module encodes multiple data segments of the second output signal and protection signals together to obtain multiple data frames including a first data frame and a second data frame, or multiple data frames including a second data frame. The first data frame includes a first frame header identifier and a first payload. The first frame header identifier is used to distinguish between the multiple data frames including the first data frame and the second data frame, or the first frame header identifier is used to distinguish between the multiple data frames including the second data frame, and the first payload is used to carry the corresponding data segment. The second data frame includes a second frame header identifier and a second payload. The second frame header identifier is used to distinguish between the multiple data frames including the first data frame and the second data frame, or the second frame header identifier is used to distinguish between the multiple data frames including the second data frame, and the second payload is used to carry the corresponding data segment and one or more protection signals. The protection signal is an output signal obtained by comparing the operating parameters of the power conversion module (e.g., at least one of operating temperature, output current, and output voltage) with reference parameters (e.g., at least one of reference temperature, reference current, and reference voltage) as input signals using an external comparator or the comparator of the first control module. This output signal provides information on whether to trigger a protection action. For example, when the operating parameter of the power conversion module is the operating temperature, the reference parameter is the reference temperature, and the protection signal is an over-temperature signal. If the operating temperature is greater than or equal to the reference temperature, the comparator output signal is 1, and the protection signal is 1, indicating that the power conversion module is operating abnormally and over-temperature protection needs to be triggered, thereby achieving over-temperature protection for the power conversion module. If the operating temperature is less than the reference temperature, the comparator output signal is 0, and the protection signal is 0, indicating that the power conversion module is operating normally and over-temperature protection does not need to be triggered. When the operating parameter of the power conversion module is the output current, the reference parameter is the reference current, and the protection signal is the overcurrent signal. If the output current is greater than or equal to the reference current, the comparator output signal is 1, and the protection signal is 1, indicating that the power conversion module is malfunctioning and overcurrent protection needs to be triggered to protect it from overcurrent. If the output current is less than the reference current, the comparator output signal is 0, and the protection signal is 0, indicating that the power conversion module is operating normally and overcurrent protection is not required. When the operating parameter of the power conversion module is the output voltage, the reference parameter is the reference voltage, and the protection signal is the overvoltage signal. If the output voltage is greater than or equal to the reference voltage, the comparator output signal is 1, and the protection signal is 1, indicating that the power conversion module is malfunctioning and overvoltage protection needs to be triggered to protect it from overvoltage. If the output voltage is less than the reference voltage, the comparator output signal is 0, and the protection signal is 0, indicating that the power conversion module is operating normally and overvoltage protection is not required. There can be one or more protection signals, each generated by a comparator.Therefore, the second payload of the second data frame can carry the corresponding data segment and one protection signal, or it can carry the corresponding data segment and multiple protection signals, or it can carry the corresponding data segment and all protection signals. Thus, the multiple data frames obtained through the second encoding method can each contain the corresponding data segment and protection signal, i.e., each data frame is a second data frame; or only some data frames contain the corresponding data segment and protection signal, while the remaining data frames only contain the corresponding data segment, i.e., some data frames are second data frames, and the remaining data frames are first data frames; or only one data frame contains the corresponding data segment and protection signal, while the remaining data frames only contain the corresponding data segment, i.e., only one data frame is a second data frame, and the remaining data frames are all first data frames.

[0121] The following section describes, based on the division of the second output signal into two data segments using the first threshold in step S203 above, the process of encoding the data segments and the protection signal together using the second encoding method to obtain the first data frame and the second data frame.

[0122] See Figure 4A and Figure 4C , Figure 4A This is a schematic diagram of a first data frame provided in this application. Figure 4C This is a schematic diagram of a second data frame provided in this application. For example... Figure 4A As shown, the second output signal is represented by a 10-bit binary number. The six least significant bits of the second output signal are used as the first data segment. This first data segment is encoded to obtain the first data frame containing the first data segment. The first data frame containing the first data segment consists of a seven-bit binary number. The seventh bit is the first frame header identifier; a value of 0 indicates that the data frame contains the first data segment. The remaining six bits are the first payload, used to carry the first data segment. (The text repeats itself here.) Figure 4CAs shown, the four high-weight binary bits in the second output signal are used as the second data segment. The second data segment and two protection signals are encoded together to obtain a second data frame containing the second data segment. The second data frame containing the second data segment includes a seven-bit binary number. The seventh bit is the second frame header identifier; a value of 1 indicates that the data frame contains the second data segment. The remaining six bits are the second payload, used to carry the second data segment and the two protection signals. The sixth bit is the first protection signal; a value of 1 indicates that the power conversion module is malfunctioning, triggering the first protection action; a value of 0 indicates that the power conversion module is operating normally, and the first protection action is not triggered. The fifth bit is the second protection signal; a value of 1 indicates that the power conversion module is malfunctioning, triggering the second protection action; a value of 0 indicates that the power conversion module is operating normally, and the second protection action is not triggered. The remaining four bits represent the second data segment. The first or second protection signal can be the aforementioned over-temperature signal, over-current signal, or over-voltage signal, etc., and the first or second protection action can be the aforementioned over-temperature protection action, over-current protection action, or over-voltage protection action, etc.

[0123] In the third encoding method, the first control module encodes multiple data segments of the second output signal and protection signals respectively, obtaining multiple data frames including a first data frame and a third data frame. Specifically, the first control module first encodes multiple data segments of the second output signal respectively, obtaining multiple data frames including a first data frame. The first data frame includes a first frame header identifier and a first payload. The first frame header identifier is used to distinguish between the multiple data frames including the first data frame and the third data frame, and the first payload is used to carry the corresponding data segment. Next, the first control module encodes one or more protection signals to obtain a third data frame. The third data frame includes a third frame header identifier and a third payload. The third frame header identifier is used to distinguish between the multiple data frames including the first data frame and the third data frame, and the third payload is used to carry one or more protection signals. Therefore, the number of third data frames is one or more. When the number of third data frames is one, it indicates that the third payload of one third data frame carries all protection signals; when the number of third data frames is multiple, it indicates that the third payload of one third data frame carries some of the protection signals.

[0124] The following section describes the process of using a third encoding method to encode the data segment and the protection signal separately to obtain a data frame, based on the division of the second output signal into two data segments using the first threshold in step S203 above.

[0125] See Figure 4D , Figure 4E and Figure 4F , Figure 4D This is a schematic diagram of another first data frame provided in this application. Figure 4E This is a schematic diagram of another first data frame provided in this application. Figure 4F This is a schematic diagram of a third data frame provided in this application. For example... Figure 4D As shown, the second output signal is represented by a 10-bit binary number. The six least significant bits of the second output signal are used as the first data segment. This first data segment is encoded to obtain a first data frame containing the first data segment. The first data frame containing the first data segment consists of an eight-bit binary number. Bits eight to seven are the first frame header identifier bits, with a value of 00 indicating that the data frame is a first data frame containing the first data segment. The remaining six bits are the first payload, used to carry the first data segment. For example... Figure 4E As shown, the four high-weight binary bits in the second output signal are used as the second data segment. Encoding this second data segment yields a first data frame containing the second data segment. The first data frame containing the second data segment comprises an eight-bit binary number. Bits eight to seven are the first frame header identifier bits, with values ​​of 0 or 1 indicating that the data frame is a first data frame containing the first data segment. The remaining six bits are the first payload, used to carry the second data segment. Bits six to three represent the second data segment, while bits two and one are null. Figure 4F As shown, the two protection signals are encoded to obtain the third data frame. The third data frame consists of an eight-bit binary number. Bits eight to seven are the third frame header identifier, with a value of 10 indicating that the data frame is the third data frame. The remaining six bits are the third payload, carrying the two protection signals. Bit six is ​​the first protection signal: a value of 1 indicates a power conversion module malfunction, triggering the first protection action; a value of 0 indicates normal operation of the power conversion module, without triggering the first protection action. Bit five is the second protection signal: a value of 1 indicates a power conversion module malfunction, triggering the second protection action; a value of 0 indicates normal operation of the power conversion module, without triggering the second protection action. The remaining four bits are null values. The first or second protection signal can be the aforementioned over-temperature signal, over-current signal, or over-voltage signal, etc., and the first or second protection action can be the aforementioned over-temperature protection action, over-current protection action, or over-voltage protection action, etc.

[0126] In summary, all three encoding operations described above can process multiple data segments of the second output signal and arrange their data formats. Furthermore, the encoded data frames can distinguish between data segments with different frequency variations. Therefore, the data frames to be transmitted can be selected according to requirements, thereby improving data transmission efficiency. On the other hand, the second and third encoding operations can encode multiple data segments together with protection signals, resulting in different types of data frames, such as data frames containing data segments and data frames containing protection signals.

[0127] S205: The first control module determines the feedback signal based on multiple data segments or multiple data frames.

[0128] Based on the three encoding methods in step S204 above, the first control module can determine the feedback signal based on multiple data frames of the second output signal using at least the following six determination methods:

[0129] In the first determination method, corresponding to the first encoding method in step S204 above, the first control module compares multiple data segments of the second output signal with multiple data segments of the third output signal to determine the feedback signal. The sampling time of the third output signal is earlier than the sampling time of the second output signal. For example, the sampling time of the second output signal is the current sampling period, while the sampling time of the third output signal could be the previous sampling period, the previous two sampling periods, etc. Specifically, the first control module compares the i-th data segment of the second output signal with the i-th data segment of the third output signal, where i ≥ 2 and i ∈ N. + If the two data segments are the same, the first data frame containing the first data segment is used as the feedback signal; if the two data segments are different, both the first data frame containing the first data segment and the first data frame containing the i-th data segment are used as feedback signals. The first data frame containing the first data segment includes a first frame header identifier and a first payload. The first payload carries the first data segment, which includes a binary number whose number of changes per unit time is greater than or equal to a first threshold. The first threshold is the largest of several threshold values.

[0130] In the second determination method, corresponding to the first encoding method in step S204 above, the first control module compares multiple data frames of the second output signal with multiple data frames of the third output signal to determine the feedback signal. The sampling time of the third output signal is earlier than the sampling time of the second output signal. For example, the sampling time of the second output signal is the current sampling period, while the sampling time of the third output signal could be the previous sampling period, the previous two sampling periods, etc. Specifically, the first control module compares the first data frame of the second output signal containing the i-th data segment with the first data frame of the third output signal containing the i-th data segment, where i ≥ 2 and i ∈ N. + If the two first data frames are the same, the first data frame containing the first data segment is used as the feedback signal; if the two first data frames are different, the first data frame containing the first data segment and the first data frame containing the i-th data segment are used as the feedback signals.

[0131] In the third determination method, corresponding to the second encoding method in step S204 above, the first control module compares multiple data segments of the second output signal with multiple data segments of the third output signal, and compares the protection signal corresponding to the second output signal and the protection signal corresponding to the third output signal, thereby determining the feedback signal. The sampling time of the third output signal is earlier than the sampling time of the second output signal. For example, the sampling time of the second output signal is the current sampling period, while the sampling time of the third output signal could be the previous sampling period, the previous two sampling periods, etc. Specifically, the first control module compares the i-th data segment of the second output signal with the i-th data segment of the third output signal, where i ≥ 2 and i ∈ N. + And, compare the j-th protection signal corresponding to the second output signal with the j-th protection signal corresponding to the third output signal, j∈N + If the two data segments are identical and the two protection signals are identical, then the data frame containing the first data segment is used as the feedback signal. The data frame containing the first data segment can be either a first data frame containing the first data segment or a second data frame containing the first data segment. If the two data segments are identical and the two protection signals are different, and the j-th protection signal is on the second net load of the second data frame containing the first data segment, then the second data frame containing the first data segment is used as the feedback signal. If the two data segments are identical and the two protection signals are different, and the j-th protection signal is not on the second net load of the second data frame containing the first data segment, then the data frame containing the first data segment, the second data frame containing the k-th data segment, and the j-th protection signal are used as the feedback signal, where k ≥ 2 and k ∈ N. + If the two data segments are different, and the two protection signals are the same, then the data frame containing the first data segment and the data frame containing the i-th data segment are used as feedback signals, wherein the data frame containing the i-th data segment can be either the first data frame containing the i-th data segment or the second data frame containing the i-th data segment; if the two data segments are different, and the two protection signals are different, and the j-th protection signal is on the second net load of the second data frame containing the first data segment, then the second data frame containing the first data segment and the data frame containing the i-th data segment are used as feedback signals; if the two data segments If the two data segments are different, and the two protection signals are different, and the j-th protection signal is on the second payload of the second data frame containing the i-th data segment, then the data frame containing the first data segment and the second data frame containing the i-th data segment are used as feedback signals; if the two data segments are different, and the two protection signals are different, and the j-th protection signal is on the second payload of the second data frame containing the k-th data segment, k≠1, and k≠i, then the data frame containing the first data segment, the data frame containing the i-th data segment, the second data frame containing the k-th data segment and the j-th protection signal are used as feedback signals.

[0132] In the fourth determination method, corresponding to the second encoding method in step S204 above, the first control module compares multiple data frames of the second output signal with multiple data frames of the third output signal to determine the feedback signal. The sampling time of the third output signal is earlier than the sampling time of the second output signal. For example, the sampling time of the second output signal is the current sampling period, while the sampling time of the third output signal could be the previous sampling period, the previous two sampling periods, etc. Specifically, the first control module compares the data frame containing the i-th data segment of the second output signal with the data frame containing the i-th data segment of the third output signal, where i ≥ 2 and i ∈ N. + If the two data frames are the same, the data frame containing the first data segment will be used as the feedback signal; if the two data frames are different, the data frame containing the first data segment and the data frame containing the i-th data segment will be used as the feedback signal.

[0133] In the fifth determination method, corresponding to the third encoding method in step S204 above, the first control module compares multiple data segments of the second output signal with multiple data segments of the third output signal, and compares the protection signal corresponding to the second output signal with the protection signal corresponding to the third output signal, thereby determining the feedback signal. The sampling time of the third output signal is earlier than the sampling time of the second output signal. For example, the sampling time of the second output signal is the current sampling period, while the sampling time of the third output signal could be the previous sampling period, the previous two sampling periods, etc. Specifically, the first control module compares the i-th data segment of the second output signal with the i-th data segment of the third output signal, where i ≥ 2 and i ∈ N. + And, compare the j-th protection signal corresponding to the second output signal with the j-th protection signal corresponding to the third output signal, j∈N + If the two data segments are the same and the two protection signals are the same, then the first data frame containing the first data segment is used as the feedback signal; if the two data segments are the same and the two protection signals are different, then the first data frame containing the first data segment and the third data frame containing the j-th protection signal corresponding to the second output signal are used as the feedback signal; if the two data segments are different and the two protection signals are the same, then the first data frame containing the first data segment and the first data frame containing the i-th data segment are used as the feedback signal; if the two data segments are different and the two protection signals are different, then the first data frame containing the first data segment, the first data frame containing the i-th data segment, and the third data frame containing the j-th protection signal corresponding to the second output signal are used as the feedback signal.

[0134] In the sixth determination method, corresponding to the third encoding method in step S204 above, the first control module compares multiple data frames of the second output signal with multiple data frames of the third output signal, and compares the third data frame corresponding to the second output signal with the third data frame corresponding to the third output signal, thereby determining the feedback signal. The sampling time of the third output signal is earlier than the sampling time of the second output signal. For example, the sampling time of the second output signal is the current sampling period, while the sampling time of the third output signal can be the previous sampling period, the previous two sampling periods, etc. Specifically, the first control module compares the first data frame of the second output signal containing the i-th data segment with the first data frame of the third output signal containing the i-th data segment, where i ≥ 2 and i ∈ N. + And, compare the third data frame containing the j-th protection signal corresponding to the second output signal with the third data frame containing the j-th protection signal corresponding to the third output signal, j∈N. + If two first data frames are identical, and two third data frames are identical, then the first data frame containing the first data segment is used as the feedback signal; if two first data frames are identical, and two third data frames are different, then the first data frame containing the first data segment and the third data frame containing the j-th protection signal corresponding to the second output signal are used as the feedback signal; if two first data frames are different, and two third data frames are identical, then the first data frame containing the first data segment and the first data frame containing the i-th data segment are used as the feedback signal; if two first data frames are different, and two third data frames are different, then the first data frame containing the first data segment, the first data frame containing the i-th data segment, and the third data frame containing the j-th protection signal corresponding to the second output signal are used as the feedback signal.

[0135] In summary, the method for determining the feedback signal is related to the encoding operation of the data segments. In the second and third encoding operations, multiple data segments are encoded together with the protection signal to form different types of data frames. Therefore, the feedback signal may include data frames containing data segments and data frames containing protection signals. Consequently, in subsequent transmission of the feedback signal, data frames containing data segments and data frames containing protection signals can be transmitted using the same interface, achieving a unified data transmission interface and reducing the number of data transmission channels and hardware resources. On the other hand, by comparing the data segments of the second output signal with those of the third output signal, or comparing the data frames of the second and third output signals, the data frame whose content has changed in the net payload is selected as the feedback signal. This operation is simple and can reduce the number of data frames in the feedback signal while transmitting the same amount of information, achieving the effect of reducing the amount of data transmitted and lowering the requirements for data transmission rate.

[0136] S206: The first control module sends a feedback signal to the second control module. Correspondingly, the second control module receives the feedback signal sent by the first control module.

[0137] In some possible implementations, the output of the first control module is connected to the input of the second control module, so that the feedback signal flows out from the output of the first control module and into the second control module from the input, thereby enabling the second control module to acquire the feedback signal from the first control module. The output of the first control module can be... Figure 1A The first terminal 111 of the first control module 11 in the signal transmission system 10, and the input terminal of the second control module can be... Figure 1A The feedback signal at the second terminal 122 of the second control module 12 in the signal transmission system 10 can be... Figure 1A The feedback signal 15 in the signal transmission system 10. Alternatively, the output of the first control module can be... Figure 1C The first terminal 111 of the first control module 11 in the signal transmission system 10, and the input terminal of the second control module can be... Figure 1C The feedback signal at the second terminal 122 of the second control module 12 in the signal transmission system 10 can be... Figure 1C The feedback signal 15 in the signal transmission system 10. Or,

[0138] In some possible implementations, the output of the first control module is connected to the input of the signal isolation module, and the output of the signal isolation module is connected to the input of the second control module. This allows the feedback signal to flow from the output of the first control module, through the input of the signal isolation module, back through its output, and finally into the second control module, thus enabling the second control module to acquire the feedback signal from the first control module. The output of the first control module can be... Figure 1B The first terminal 111 of the first control module 11 in the signal transmission system 10, the signal isolation module can be Figure 1B The signal isolation module 18 in the signal transmission system 10 can have its input terminal as follows: Figure 1B The second terminal 182 of the signal isolation module 18 in the signal transmission system 10, the output terminal of the signal isolation module can be Figure 1B The first terminal 181 of the signal isolation module 18 in the signal transmission system 10, and the input terminal of the second control module can be... Figure 1B The feedback signal at the second terminal 122 of the second control module 12 in the signal transmission system 10 can be... Figure 1B The feedback signal 15 in the signal transmission system 10. Alternatively, the output of the first control module can be... Figure 1DThe first terminal 111 of the first control module 11 in the signal transmission system 10, the signal isolation module can be Figure 1D The signal isolation module 18 in the signal transmission system 10 can have its input terminal as follows: Figure 1D The second terminal 182 of the signal isolation module 18 in the signal transmission system 10, the output terminal of the signal isolation module can be Figure 1D The first terminal 181 of the signal isolation module 18 in the signal transmission system 10, and the input terminal of the second control module can be... Figure 1D The feedback signal at the second terminal 122 of the second control module 12 in the signal transmission system 10 can be... Figure 1D Feedback signal 15 in the signal transmission system 10.

[0139] S207: The second control module decodes the feedback signal to obtain the second output signal.

[0140] According to the six determination methods in step S205 above, the feedback signal obtained by the second control module includes a data frame containing the first data segment. The data frame containing the first data segment can be either a first data frame containing the first data segment or a second data frame containing the first data segment.

[0141] In some cases, the feedback signal also includes a fourth data frame. The payload of this fourth data frame carries a different content than the payload of the data frame with the same frame header identifier in the third output signal. Specifically, the fourth data frame can have the following five forms:

[0142] (1) The fourth data frame is a data frame containing the i-th data segment, where i ≥ 2 and i ∈ N. + The data frame containing the i-th data segment can be either a first data frame containing the i-th data segment or a second data frame containing the i-th data segment.

[0143] (2) The fourth data frame is the second data frame containing the k-th data segment and the j-th protection signal, where j∈N + k≥2, and k∈N + ;

[0144] (3) The fourth data frame is a data frame containing the i-th data segment, a second data frame containing the k-th data segment and the j-th protection signal;

[0145] (4) The fourth data frame is the third data frame containing the j-th protection signal;

[0146] (5) The fourth data frame is the first data frame containing the i-th data segment and the third data frame containing the j-th protection signal.

[0147] Therefore, the second control module decodes the feedback signal to obtain the second output signal, which can include at least the following six processing methods:

[0148] In the first processing method, corresponding to the feedback signal in the first case above, the second control module extracts the first data segment of the second output signal from the data frame containing the first data segment, and splices the first data segment of the second output signal with the other data segments in the third output signal except for the first data segment, thereby forming the second output signal.

[0149] In the second processing method, corresponding to the feedback signal in the second case above, the second control module extracts the first data segment of the second output signal from the data frame containing the first data segment, extracts the i-th data segment of the second output signal from the data frame containing the i-th data segment, and splices the first data segment and the i-th data segment of the second output signal with the other data segments in the third output signal except for the first data segment and the i-th data segment to form the second output signal.

[0150] In the third processing method, corresponding to the feedback signal in the third case above, the second control module extracts the first data segment of the second output signal from the data frame containing the first data segment, extracts the kth data segment of the second output signal and the jth protection signal from the second data frame containing the kth data segment and the jth protection signal, and splices the first data segment and the kth data segment of the second output signal with the other data segments in the third output signal except for the first data segment and the kth data segment to form the second output signal.

[0151] In the fourth processing method, corresponding to the feedback signal in the fourth case above, the second control module extracts the first data segment of the second output signal from the data frame containing the first data segment, extracts the i-th data segment of the second output signal from the data frame containing the i-th data segment, extracts the k-th data segment of the second output signal and the j-th protection signal from the second data frame containing the k-th data segment and the j-th protection signal, and splices the first data segment, the i-th data segment, and the k-th data segment of the second output signal with the other data segments of the third output signal except for the first data segment, the i-th data segment, and the k-th data segment to form the second output signal.

[0152] In the fifth processing method, corresponding to the feedback signal in the fifth case above, the second control module extracts the first data segment of the second output signal from the first data frame containing the first data segment, extracts the j-th protection signal corresponding to the second output signal from the third data frame containing the j-th protection signal corresponding to the second output signal, and splices the first data segment of the second output signal with the other data segments in the third output signal except for the first data segment to form the second output signal.

[0153] In the sixth processing method, corresponding to the feedback signal in the sixth case above, the second control module extracts the first data segment of the second output signal from the first data frame containing the first data segment, extracts the i-th data segment of the second output signal from the first data frame containing the i-th data segment, extracts the j-th protection signal corresponding to the second output signal from the third data frame containing the j-th protection signal corresponding to the second output signal, and concatenates the first data segment of the second output signal with the other data segments in the third output signal except for the first data segment and the i-th data segment to form the second output signal.

[0154] S208: The second control module generates a control signal for controlling the power conversion module based on the second output signal.

[0155] The second output signal obtained according to the six processing methods in step S207 above falls into the following two categories:

[0156] (1) In the first processing method and the second processing method, the second control module performs a decoding operation on the feedback signal to obtain the second output signal;

[0157] (2) In the third to sixth processing methods, the second control module performs a decoding operation on the feedback signal to obtain the second output signal and the j-th protection signal.

[0158] In the first scenario described above, the second control module compensates the second output signal to obtain a compensated signal, then generates a control signal based on the compensated signal and sends the control signal to the power conversion module. Correspondingly, the power conversion module receives the control signal sent by the second control module. Subsequently, the power conversion module converts the input signal into a new output signal based on the control signal. The control signal can be... Figure 1A The control signal 16 in the signal transmission system 10 can be an input signal. Figure 1A The input signal 17 in the signal transmission system 10. Alternatively, the control signal can be... Figure 1B The control signal 16 in the signal transmission system 10 can be an input signal. Figure 1B The input signal 17 in the signal transmission system 10. Alternatively, the control signal can be... Figure 1C The control signal 16 in the signal transmission system 10 can be an input signal. Figure 1C The input signal 17 in the signal transmission system 10. Alternatively, the control signal can be... Figure 1D The control signal 16 in the signal transmission system 10 can be an input signal. Figure 1D Input signal 17 in signal transmission system 10.

[0159] In the second scenario described above, the second control module compensates the second output signal to obtain a compensated signal, and then generates a control signal based on the compensated signal. Furthermore, the second control module generates a j-th action signal based on the j-th protection signal. Next, the second control module sends the control signal and the j-th action signal to the power conversion module. Correspondingly, the power conversion module receives the control signal and the j-th action signal sent by the second control module. Subsequently, the power conversion module converts the input signal into a new output signal based on the control signal, and triggers the j-th protection action based on the j-th action signal, thereby protecting the power conversion module. The j-th protection action can be the over-temperature protection action, over-current protection action, or over-voltage protection action, etc., as described in step S204 above.

[0160] In some possible implementations, the control signal can be a switching control signal. Specifically, the second control module can employ pulse skip modulation (PSM) mode, using the compensation signal as input data to generate a PSM signal as the switching control signal. Alternatively, the second control module can employ pulse width modulation (PWM) mode, using the compensation signal as input data to generate a PWM signal as the switching control signal. Or, the second control module can employ pulse frequency modulation (PFM) mode, using the compensation signal as input data to generate a PFM signal as the switching control signal.

[0161] In summary, by implementing the embodiments of the present invention, the output signal of the power conversion module can be converted from an analog signal to a digital signal. Then, through encoding, the output signal is converted into multiple data frames. The data frame containing the first data segment is selected from these multiple data frames as a feedback signal. This feedback signal is transmitted to the second control module in digital form to generate a control signal. Therefore, transmitting only a portion of the data frames achieves the same amount of information, reducing the amount of data transmitted and thus lowering the transmission rate. Furthermore, transmitting the feedback signal in digital form, compared to optocoupler transmission or dedicated channel transmission, not only directly provides data support for subsequent digital control work based on complex algorithms but also ensures an increase in the amount of data and information transmitted.

[0162] See Figure 5 , Figure 5 This is a schematic diagram of a signal transmission device provided in this application. The signal transmission device 500 can be used to implement the aforementioned signal transmission method. For example... Figure 5 As shown, the signal transmission device 500 includes: a first module 501,

[0163] The first module 501 is used to convert the first output signal of the power conversion device into a second output signal according to a ratio.

[0164] The first module 501 is also used to divide the second output signal into multiple data segments based on multiple thresholds;

[0165] The first module 501 is also used to encode multiple data segments separately to obtain multiple data frames;

[0166] The first module 501 is also used to determine the feedback signal based on multiple data segments or multiple data frames;

[0167] The second output signal is a digital signal, the first output signal is an analog signal, each of the multiple data frames includes a payload, the payload is used to carry the corresponding data segment, the data segment belongs to multiple data segments, the feedback signal includes a data frame containing the first data segment, the data frame belongs to multiple data frames, the first data segment belongs to multiple data segments, the first data segment includes a binary number whose number of changes per unit time is greater than or equal to a first threshold, the first threshold is the threshold with the largest value among multiple thresholds.

[0168] In some possible implementations, the first module 501 is specifically used to: encode multiple data segments separately to obtain multiple data frames, including the first data frame.

[0169] In some possible implementations, the first data frame includes a first frame header identifier and a first payload, wherein the first frame header identifier is used to distinguish multiple data frames, and the first payload is used to carry the corresponding data segment, which belongs to multiple data segments.

[0170] In some possible implementations, the first module 501 is specifically used to: encode multiple data segments and protection signals to obtain multiple data frames, including a first data frame and a second data frame.

[0171] In some possible implementations, the first module 501 is specifically used to: encode multiple data segments and protection signals to obtain multiple data frames, including the second data frame.

[0172] In some possible implementations, the second data frame includes a second frame header identifier and a second payload. The second frame header identifier is used to distinguish multiple data frames, and the second payload is used to carry the corresponding data segment and protection signal. The data segment belongs to multiple data segments.

[0173] In some possible implementations, the first module 501 is specifically used to: encode multiple data segments and protection signals to obtain multiple data frames, including a first data frame, and a third data frame.

[0174] In some possible implementations, the feedback signal also includes a fourth data frame, which belongs to multiple data frames or the third data frame. The payload of the fourth data frame carries content different from the payload of the data frames with the same frame header identifier in the third output signal. The sampling time of the third output signal is earlier than the sampling time of the second output signal.

[0175] In some possible implementations, the fourth data frame is obtained by the first module 501 comparing the second output signal with the third output signal.

[0176] In some possible implementations, the fourth data frame is obtained by the first module 501 by comparing multiple data frames of the second output signal with multiple data frames of the third output signal.

[0177] In some possible implementations, the fourth data frame is obtained by the first module 501 comparing multiple data segments of the second output signal with multiple data segments of the third output signal.

[0178] In some possible implementations, the fourth data frame is obtained by the first module 501 by comparing multiple data segments of the second output signal with multiple data segments of the third output signal, and by comparing the protection signal corresponding to the second output signal with the protection signal corresponding to the third output signal.

[0179] In some possible implementations, the third data frame includes a third frame header identifier and a third payload. The third frame header identifier is used to distinguish between multiple data frames and the third data frame, and the third payload is used to carry protection signals.

[0180] In some possible implementations, the signal transmission device 500 also includes a second module.

[0181] The second module is used to receive feedback signals sent by the first module 501;

[0182] The second module is also used to decode the feedback signal to obtain the second output signal;

[0183] The second module is also used to generate control signals for controlling the power conversion device based on the second output signal.

[0184] The first module 501 described above can be implemented in software or in hardware. For example, the implementation of the first module 501 will be described below. Similarly, the implementation of the second module can refer to the implementation of the first module 501.

[0185] As an example of a software functional unit, the first module 501 may include code running on a computing instance. The computing instance may include at least one of a physical host (computing device), a virtual machine, and a container.

[0186] As an example of a hardware functional unit, the first module 501 may include at least one computing device, such as a server. Alternatively, the first module 501 may also be a device implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD). The PLD may be implemented using a complex programmable logical device (CPLD), a field-programmable gate array (FPGA), generic array logic (GAL), or any combination thereof.

[0187] It should be noted that, in other embodiments, the first module 501 can be used to execute any step in the signal transmission method, and the second module can be used to execute any step in the signal transmission method. The steps implemented by the first module 501 and the second module can be specified as needed. The first module 501 and the second module respectively implement different steps in the signal transmission method to realize all the functions of the signal transmission device.

[0188] See Figure 6 , Figure 6 This is a schematic diagram of a signal transmission system provided in this application. The signal transmission system 600 can be used to implement the aforementioned signal transmission method. Figure 6 As shown, the signal transmission system 600 includes: a signal transmission device 601 and a power conversion device 602.

[0189] The power conversion device 602 is used to generate the first output signal;

[0190] The signal transmission device 601 is used to convert the first output signal of the power conversion device 602 into a second output signal according to a ratio.

[0191] The signal transmission device 601 is also used to divide the second output signal into multiple data segments based on multiple thresholds;

[0192] The signal transmission device 601 is also used to encode multiple data segments separately to obtain multiple data frames;

[0193] The signal transmission device 601 is also used to determine the feedback signal based on multiple data segments or multiple data frames;

[0194] The second output signal is a digital signal, the first output signal is an analog signal, each of the multiple data frames includes a payload, the payload is used to carry the corresponding data segment, the data segment belongs to multiple data segments, the feedback signal includes a data frame containing the first data segment, the data frame belongs to multiple data frames, the first data segment belongs to multiple data segments, the first data segment includes a binary number whose number of changes per unit time is greater than or equal to a first threshold, the first threshold is the threshold with the largest value among multiple thresholds.

[0195] In some possible implementations, the signal transmission device 601 is specifically used to: encode multiple data segments separately to obtain multiple data frames, including the first data frame.

[0196] In some possible implementations, the first data frame includes a first frame header identifier and a first payload, wherein the first frame header identifier is used to distinguish multiple data frames, and the first payload is used to carry the corresponding data segment, which belongs to multiple data segments.

[0197] In some possible implementations, the signal transmission device 601 is specifically used to: encode multiple data segments and protection signals to obtain multiple data frames, including a first data frame and a second data frame.

[0198] In some possible implementations, the signal transmission device 601 is specifically used to: encode multiple data segments and protection signals to obtain multiple data frames, including a second data frame.

[0199] In some possible implementations, the second data frame includes a second frame header identifier and a second payload. The second frame header identifier is used to distinguish multiple data frames, and the second payload is used to carry the corresponding data segment and protection signal. The data segment belongs to multiple data segments.

[0200] In some possible implementations, the signal transmission device 601 is specifically used to: encode multiple data segments and protection signals to obtain multiple data frames, including a first data frame, and a third data frame.

[0201] In some possible implementations, the feedback signal also includes a fourth data frame, which belongs to multiple data frames or the third data frame. The payload of the fourth data frame carries content different from the payload of the data frames with the same frame header identifier in the third output signal. The sampling time of the third output signal is earlier than the sampling time of the second output signal.

[0202] In some possible implementations, the fourth data frame is obtained by the signal transmission device 601 comparing the second output signal with the third output signal.

[0203] In some possible implementations, the fourth data frame is obtained by the signal transmission device 601 by comparing multiple data frames of the second output signal with multiple data frames of the third output signal.

[0204] In some possible implementations, the fourth data frame is obtained by the signal transmission device 601 by comparing multiple data segments of the second output signal with multiple data segments of the third output signal.

[0205] In some possible implementations, the fourth data frame is obtained by the signal transmission device 601 by comparing multiple data segments of the second output signal with multiple data segments of the third output signal, and by comparing the protection signal corresponding to the second output signal with the protection signal corresponding to the third output signal.

[0206] In some possible implementations, the third data frame includes a third frame header identifier and a third payload. The third frame header identifier is used to distinguish between multiple data frames and the third data frame, and the third payload is used to carry protection signals.

[0207] In some possible implementations, the signal transmission device 601 is also used to: decode the feedback signal to obtain a second output signal; and generate a control signal for controlling the power conversion device 602 based on the second output signal.

[0208] Both the signal transmission device 601 and the power conversion device 602 described above can be implemented in software or in hardware. For example, the implementation of the signal transmission device 601 will be described below. Similarly, the implementation of the power conversion device 602 can refer to the implementation of the signal transmission device 601.

[0209] As an example of a software functional unit, the signal transmission device 601 may include code running on a computing instance. The computing instance may include at least one of a physical host (computing device), a virtual machine, and a container.

[0210] As an example of a hardware functional unit, the signal transmission device 601 may include at least one computing device, such as a server. Alternatively, the signal transmission device 601 may also be a device implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD). The PLD may be implemented using a complex programmable logical device (CPLD), a field-programmable gate array (FPGA), generic array logic (GAL), or any combination thereof.

[0211] It should be understood that in the embodiments of the present invention, "when," "...when," and "if" all refer to the terminal device or access network device making corresponding processing under certain objective circumstances, and are not time-limited, nor do they require the terminal device or access network device to make a judgment action, nor do they imply any other limitations.

[0212] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A signal transmission method, characterized by, The method is applied to a signal transmission system comprising a first control module, and the method comprises: The first control module converts a first output signal of a power conversion module into a second output signal in proportion, wherein the second output signal is a digital signal and the first output signal is an analog signal; The first control module divides the second output signal into a plurality of data segments by comparing a relationship between a change frequency of a binary number in the second output signal in a unit time and a threshold value; The first control module encodes the plurality of data segments respectively to obtain a plurality of data frames, wherein each data frame in the plurality of data frames comprises a net load, and the net load is used to carry a corresponding data segment, and the data segment belongs to the plurality of data segments; The first control module determines a feedback signal based on the plurality of data segments or the plurality of data frames, wherein the feedback signal comprises a data frame comprising a first data segment, the data frame belongs to the plurality of data frames, the first data segment belongs to the plurality of data segments, and the first data segment comprises a binary number with a change frequency greater than or equal to a first threshold value in a unit time, and the first threshold value is a threshold value with the largest value in the plurality of threshold values.

2. The method of claim 1, wherein, The first control module encodes the plurality of data segments respectively to obtain a plurality of data frames, comprising: The first control module encodes the plurality of data segments respectively to obtain the plurality of data frames comprising a first data frame.

3. The method of claim 2, wherein, The first data frame comprises a first frame header identification bit and a first net load, wherein the first frame header identification bit is used to distinguish the plurality of data frames, and the first net load is used to carry a corresponding data segment, and the data segment belongs to the plurality of data segments.

4. The method according to claim 2 or 3, characterized in that, The first control module encodes the plurality of data segments respectively to obtain the plurality of data frames comprising a first data frame, comprising: The first control module encodes the plurality of data segments and a protection signal to obtain the plurality of data frames comprising the first data frame and a second data frame.

5. The method of claim 1, wherein, The first control module encodes the plurality of data segments respectively to obtain a plurality of data frames, comprising: The first control module encodes the plurality of data segments and a protection signal to obtain the plurality of data frames comprising a second data frame.

6. The method of claim 5, wherein, The second data frame comprises a second frame header identification bit and a second net load, wherein the second frame header identification bit is used to distinguish the plurality of data frames, and the second net load is used to carry a corresponding data segment and the protection signal, and the data segment belongs to the plurality of data segments.

7. The method of claim 2 or 3, wherein, The first control module encodes the plurality of data segments respectively to obtain the plurality of data frames comprising a first data frame, comprising: The first control module encodes the plurality of data segments and a protection signal to obtain the plurality of data frames comprising the first data frame and a third data frame.

8. The method according to any of claims 1, 2, 3, 5, 6, characterized in that, The feedback signal further comprises a fourth data frame, the fourth data frame belonging to the multiple data frames or the third data frame, and a content carried by a net payload of the fourth data frame being different from a content carried by a net payload of a data frame having a same frame header identification bit in the third output signal, wherein a sampling time of the third output signal is earlier than a sampling time of the second output signal.

9. The method of claim 8, wherein, The fourth data frame is obtained by comparing the second output signal and the third output signal by the first control module.

10. The method of claim 9, wherein, The fourth data frame is obtained by comparing multiple data frames of the second output signal and multiple data frames of the third output signal by the first control module.

11. The method of claim 9, wherein, The fourth data frame is obtained by comparing multiple data segments of the second output signal and multiple data segments of the third output signal by the first control module.

12. The method of claim 11, wherein, The fourth data frame is obtained by comparing multiple data segments of the second output signal and multiple data segments of the third output signal, and comparing a protection signal corresponding to the second output signal and a protection signal corresponding to the third output signal by the first control module.

13. The method of claim 7, wherein, The third data frame comprises a third frame header identification bit and a third net payload, wherein the third frame header identification bit is used to distinguish the multiple data frames and the third data frame, and the third net payload is used to carry a protection signal.

14. The method of any one of claims 1, 2, 3, 5, 6, 9, 10, 11, 12, 13, wherein, The signal transmission system further comprises a second control module, and the method further comprises: The second control module receives the feedback signal sent by the first control module. The second control module decodes the feedback signal to obtain the second output signal. The second control module generates a control signal for controlling the power conversion module based on the second output signal.

15. A signal transmission device, characterized by comprising: Comprise: A first module, The first module is configured to convert a first output signal of a power conversion device into a second output signal according to a ratio, wherein the second output signal is a digital signal, and the first output signal is an analog signal. The first module is further configured to divide the second output signal into multiple data segments by comparing a relationship between a variation frequency of a binary number in the second output signal in a unit time and a threshold value. The first module is further configured to encode the multiple data segments respectively to obtain multiple data frames, wherein each data frame in the multiple data frames comprises a net payload, the net payload is used to carry a corresponding data segment, and the data segment belongs to the multiple data segments. The first module is further configured to determine a feedback signal based on the multiple data segments or the multiple data frames, wherein the feedback signal comprises a data frame comprising a first data segment, the data frame belongs to the multiple data frames, the first data segment belongs to the multiple data segments, and the first data segment comprises a binary number having a variation frequency greater than or equal to a first threshold value in a unit time, the first threshold value being a threshold value with a maximum value in the multiple threshold values.

16. The apparatus of claim 15, wherein, The first module is specifically configured to encode the multiple data segments respectively to obtain the multiple data frames comprising the first data frame.

17. The apparatus of claim 16, wherein, The first data frame comprises a first frame header identification bit and a first net payload, wherein the first frame header identification bit is used to distinguish the plurality of data frames, and the first net payload is used to carry a corresponding data segment, which belongs to the plurality of data segments.

18. The apparatus of claim 16 or 17, wherein, The first module is specifically configured to: perform encoding operation on the plurality of data segments and the protection signal to obtain the plurality of data frames including the first data frame and a second data frame.

19. The apparatus of claim 15, wherein, The first module is specifically configured to: perform encoding operation on the plurality of data segments and the protection signal to obtain the plurality of data frames including the second data frame.

20. The apparatus of claim 19, wherein, The second data frame comprises a second frame header identification bit and a second net payload, wherein the second frame header identification bit is used to distinguish the plurality of data frames, and the second net payload is used to carry a corresponding data segment and the protection signal, which belongs to the plurality of data segments.

21. The apparatus of claim 16 or 17, wherein, The first module is specifically configured to: perform encoding operation on the plurality of data segments and the protection signal to obtain the plurality of data frames including the first data frame and a third data frame.

22. The apparatus of any of claims 15, 16, 17, 19, 20, wherein, The feedback signal further comprises a fourth data frame, which belongs to the plurality of data frames or the third data frame, and a net payload of the fourth data frame carries content different from that of a data frame with the same frame header identification bit in a third output signal, wherein a sampling time of the third output signal is earlier than that of the second output signal.

23. The apparatus of claim 22, wherein, The fourth data frame is obtained by comparing the second output signal and the third output signal by the first module.

24. The apparatus of claim 23, wherein, The fourth data frame is obtained by comparing a plurality of data frames of the second output signal and a plurality of data frames of the third output signal by the first module.

25. The apparatus of claim 23, wherein, The fourth data frame is obtained by comparing a plurality of data segments of the second output signal and a plurality of data segments of the third output signal by the first module.

26. The apparatus of claim 25, wherein, The fourth data frame is obtained by comparing a plurality of data segments of the second output signal and a plurality of data segments of the third output signal, and comparing a corresponding protection signal of the second output signal and a corresponding protection signal of the third output signal by the first module.

27. The apparatus of claim 21, wherein, The third data frame comprises a third frame header identification bit and a third net payload, wherein the third frame header identification bit is used to distinguish the plurality of data frames and the third data frame, and the third net payload is used to carry the protection signal.

28. The apparatus of any one of claims 15, 16, 17, 19, 20, 23, 24, 25, 26, 27, wherein, The signal transmission device further comprises a second module, The second module is configured to receive the feedback signal sent by the first module. The second module is further configured to perform decoding operation on the feedback signal to obtain the second output signal. The second module is further configured to generate a control signal for controlling the power conversion device based on the second output signal.

29. A signal transmission system, characterized by Comprise: a signal transmission device and a power conversion device, The signal transmission device is configured to perform the method of any one of claims 1 to 14. The power conversion device is configured to generate a first output signal.

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