Signal transmission method for power supply, storage medium, device and program product

Abstract

The embodiment of the invention provides a signal transmission method for power supply, a storage medium, equipment and a program product. The method comprises the steps that a direct-current power supply and two modulation circuits are deployed in a primary side end, the direct-current power supply is used for generating a direct-current electric signal, and an energy transmission signal is received based on a preset time period; wherein the energy transmission signal is used for representing the power supply condition from the primary side end to the secondary side end. If it is determined that the energy transmission signal meets the preset condition, for each digital identifier in the energy transmission signal, determining a modulation circuit corresponding to the digital identifier as a target circuit; wherein the two modulation circuits are respectively a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit; and through the target circuit, the direct-current signal of the direct-current power supply is converted into an alternating-current signal, and the alternating-current signal is sent to the secondary side end. The method is used for achieving the effects of avoiding increasing the physical size of the primary side end and avoiding increasing the hardware cost.

Description

Technical Field

[0001] The present application relates to the technical field of wireless energy transmission or contactless energy transmission, and in particular to a signal transmission method, storage medium, device and program product for power supply. Background Art

[0002] In high-tech fields such as new energy vehicles and implantable medical devices, secondary-side electronic devices often need to simultaneously realize wireless charging and data reception functions. Therefore, the primary side needs to wirelessly transmit power and data to the secondary side at the same time.

[0003] In related technologies, a dual transmission circuit design may be adopted: in addition to the power transmission circuit, an independent data transmission circuit is additionally configured.

[0004] However, this architecture has obvious flaws: first, the separate circuit design will significantly increase the physical size of the primary side, making it difficult to meet the demand for miniaturization of the primary side; second, the additional hardware modules will lead to an increase in the cost of the primary side. Summary of the Invention

[0005] The embodiments of the present application provide a signal transmission method, storage medium, device, and program product for power supply, so as to avoid increasing the physical size of the primary side and avoid increasing the hardware cost.

[0006] In a first aspect, an embodiment of the present application provides a signal transmission method for power supply, the method being applied to a primary side; the primary side is provided with a DC power supply and two modulation circuits, the DC power supply being used to generate a DC signal; the method comprising:

[0007] Based on a preset time period, receiving an energy transmission signal; wherein the energy transmission signal is used to represent the power supply status of the primary side to the secondary side;

[0008] If it is determined that the energy transmission signal satisfies a preset condition, then for each digital identifier in the energy transmission signal, a modulation circuit corresponding to the digital identifier is determined as a target circuit; wherein the two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit, respectively;

[0009] The DC power signal of the DC power supply is converted into an AC power signal through the target circuit; and the AC power signal is sent to the secondary side.

[0010] In one possible implementation, a drive circuit is disposed in the primary end, and the drive circuit is used to amplify the signal; and converting the DC signal of the DC power supply into an AC signal through the target circuit includes:

[0011] Converting the digital identifier corresponding to the target circuit into a modulated signal through the target circuit; wherein the modulated signal represents the digital identifier;

[0012] Amplifying the voltage and current of the modulation signal by the driving circuit to obtain an amplified modulation signal;

[0013] The DC power signal of the DC power supply is converted into an AC power signal according to the amplified modulation signal.

[0014] In one possible implementation, an inverter circuit is deployed in the primary side; and converting the DC power signal of the DC power supply into an AC power signal according to the amplified modulation signal includes:

[0015] According to the amplified modulation signal, the DC power supply is controlled to generate a DC signal which passes through the inverter circuit to obtain the AC signal.

[0016] In one possible implementation, a first harmonic attenuation circuit is deployed at the primary end, the first harmonic attenuation circuit including a primary compensation capacitor and a primary coupling coil connected in series; and according to the amplified modulation signal, controlling the DC power supply to generate a DC signal to pass through the inverter circuit to obtain the AC signal includes:

[0017] According to the amplified modulation signal, the DC power supply is controlled to generate a DC signal which passes through the inverter circuit to obtain an initial AC signal; wherein the initial AC signal includes a fundamental wave and harmonics;

[0018] The first harmonic attenuation circuit attenuates the harmonics in the initial alternating current signal to obtain the alternating current signal.

[0019] In one possible implementation, determining that the energy transmission signal satisfies a preset condition includes:

[0020] If the format of the energy transmission signal is a preset format and the energy transmission signal only contains the first identifier and / or the second identifier, it is determined that the energy transmission signal meets the preset condition.

[0021] In a second aspect, an embodiment of the present application provides a signal transmission method for power supply, the method being applied to a secondary side, the secondary side being an electronic device to be powered, and the secondary side being configured with a harmonic enhancement circuit and a signal amplification circuit; the method comprising:

[0022] Receive an AC signal transmitted from the primary side; wherein the AC signal refers to an AC signal generated by receiving an energy transmission signal from the primary side and converting a digital identifier corresponding to the modulation circuit in the energy transmission signal into a modulation signal through a modulation circuit;

[0023] The harmonic enhancement circuit enhances the preset harmonics in the AC signal to obtain an enhanced AC signal;

[0024] amplifying the voltage of the enhanced alternating current signal through the signal amplifying circuit to obtain an amplified alternating current signal;

[0025] The energy transfer signal is determined according to the voltage of the amplified alternating current signal.

[0026] In a possible implementation, determining the energy transfer signal according to the voltage in the amplified alternating current signal includes:

[0027] determining current amplitude information of the preset harmonic according to the voltage in the amplified alternating current signal;

[0028] determining a digital identifier according to the current amplitude information;

[0029] The energy transmission signal is determined according to the determined digital identifier.

[0030] In a possible implementation, a second harmonic attenuation circuit is deployed in the secondary end, and the second harmonic attenuation circuit includes a secondary compensation capacitor and a secondary coupling coil connected in series; and further includes:

[0031] Attenuating the harmonics in the AC signal through the second harmonic attenuation circuit to obtain a target AC signal;

[0032] By means of the harmonic enhancement circuit, the preset harmonics in the target AC power signal are enhanced to obtain an enhanced target AC power signal;

[0033] performing voltage amplification processing on the enhanced target AC signal through the signal amplification circuit to obtain an amplified target AC signal;

[0034] The energy transfer signal is determined according to the voltage of the amplified target AC signal.

[0035] In a possible implementation, determining the current amplitude information of the preset harmonic according to the voltage in the amplified alternating current signal includes:

[0036] Based on a preset Fourier algorithm, the voltage in the amplified alternating current signal is converted from the time domain to the frequency domain to obtain current amplitude information of the preset harmonic.

[0037] In a possible implementation, determining the digital identifier according to the current amplitude information includes:

[0038] If the current amplitude information is greater than a preset amplitude threshold, determining that the digital identifier is a first identifier;

[0039] If the current amplitude information is less than or equal to a preset amplitude threshold, the digital identifier is determined to be a second identifier.

[0040] In a possible implementation manner, a rectifier circuit is disposed in the secondary side; and further comprising:

[0041] The alternating current signal is converted into a direct current power supply signal by the rectifier circuit; wherein the power supply signal is used to supply power to the secondary side.

[0042] In a third aspect, an embodiment of the present application provides a signal transmission device for power supply, the device being applied to a primary side, wherein a DC power supply and two modulation circuits are deployed in the primary side, wherein the DC power supply is used to generate a DC signal; the device comprising:

[0043] A receiving module, configured to receive an energy transmission signal based on a preset time period; wherein the energy transmission signal is used to represent the power supply status of the primary side to the secondary side;

[0044] a determination module configured to, if it is determined that the energy transmission signal satisfies a preset condition, determine, for each digital identifier in the energy transmission signal, a modulation circuit corresponding to the digital identifier as a target circuit; wherein the two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit, respectively;

[0045] a signal conversion module, configured to convert the DC signal of the DC power supply into an AC signal through the target circuit;

[0046] The sending module is used to send an AC signal to the secondary side.

[0047] In a possible implementation, a driving circuit is disposed in the primary end, and the driving circuit is used to amplify the signal; the signal conversion module is specifically used to:

[0048] Converting the digital identifier corresponding to the target circuit into a modulated signal through the target circuit; wherein the modulated signal represents the digital identifier;

[0049] Amplifying the voltage and current of the modulation signal by the driving circuit to obtain an amplified modulation signal;

[0050] The DC power signal of the DC power supply is converted into an AC power signal according to the amplified modulation signal.

[0051] In one possible implementation, an inverter circuit is deployed in the primary side; and when the signal conversion module converts the DC power supply's DC signal into an AC signal based on the amplified modulation signal, the signal conversion module is specifically configured to:

[0052] According to the amplified modulation signal, the DC power supply is controlled to generate a DC signal which passes through the inverter circuit to obtain the AC signal.

[0053] In one possible implementation, a first harmonic attenuation circuit is deployed in the primary end, the first harmonic attenuation circuit including a primary compensation capacitor and a primary coupling coil connected in series; and the signal conversion module, when controlling the DC power supply to generate a DC signal through the inverter circuit to obtain the AC signal based on the amplified modulation signal, is specifically configured to:

[0054] According to the amplified modulation signal, the DC power supply is controlled to generate a DC signal which passes through the inverter circuit to obtain an initial AC signal; wherein the initial AC signal includes a fundamental wave and harmonics;

[0055] The first harmonic attenuation circuit attenuates the harmonics in the initial alternating current signal to obtain the alternating current signal.

[0056] In a fourth aspect, an embodiment of the present application provides a signal transmission device for power supply, the device being applied to a secondary side, the secondary side being an electronic device to be powered, the secondary side being configured with a harmonic enhancement circuit and a signal amplification circuit, the device comprising:

[0057] A receiving module, configured to receive an AC signal transmitted from a primary end; wherein the AC signal is an AC signal generated by receiving an energy transmission signal from the primary end and converting a digital identifier corresponding to the modulation circuit in the energy transmission signal into a modulation signal through a modulation circuit;

[0058] an enhancement module, configured to enhance the preset harmonics in the AC power signal through the harmonic enhancement circuit to obtain an enhanced AC power signal;

[0059] an amplifying module, configured to amplify the voltage of the enhanced alternating current signal through the signal amplifying circuit to obtain an amplified alternating current signal;

[0060] A determination module is used to determine the energy transmission signal according to the voltage in the amplified alternating current signal.

[0061] In a possible implementation, the determining module is specifically configured to:

[0062] determining current amplitude information of the preset harmonic according to the voltage in the amplified alternating current signal;

[0063] determining a digital identifier according to the current amplitude information;

[0064] The energy transmission signal is determined according to the determined digital identifier.

[0065] In one possible implementation, a second harmonic attenuation circuit is deployed in the secondary end, and the second harmonic attenuation circuit includes a secondary compensation capacitor and a secondary coupling coil connected in series; the device is further configured to:

[0066] Attenuating the harmonics in the AC signal through the second harmonic attenuation circuit to obtain a target AC signal;

[0067] By means of the harmonic enhancement circuit, the preset harmonics in the target AC power signal are enhanced to obtain an enhanced target AC power signal;

[0068] performing voltage amplification processing on the enhanced target AC signal through the signal amplification circuit to obtain an amplified target AC signal;

[0069] The energy transfer signal is determined according to the voltage of the amplified target AC signal.

[0070] In a possible implementation manner, when determining the current amplitude information of the preset harmonic according to the voltage in the amplified AC signal, the determination module is specifically configured to:

[0071] Based on a preset Fourier algorithm, the voltage in the amplified alternating current signal is converted from the time domain to the frequency domain to obtain current amplitude information of the preset harmonic.

[0072] In a possible implementation manner, when determining the digital identifier according to the current amplitude information, the determination module is specifically configured to:

[0073] If the current amplitude information is greater than a preset amplitude threshold, determining that the digital identifier is a first identifier;

[0074] If the current amplitude information is less than or equal to a preset amplitude threshold, the digital identifier is determined to be a second identifier.

[0075] In one possible implementation, a rectifier circuit is disposed in the secondary side; and the device is further configured to:

[0076] The alternating current signal is converted into a direct current power supply signal by the rectifier circuit; wherein the power supply signal is used to supply power to the secondary side.

[0077] In a fifth aspect, an embodiment of the present application provides an electronic device, including: a memory, a processor;

[0078] The memory stores computer-executable instructions;

[0079] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the first aspect and / or various possible implementations of the first aspect as described above; or, the processor executes the second aspect and / or various possible implementations of the second aspect as described above.

[0080] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-readable storage medium is stored computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementation methods of the first aspect; or, when executed by a processor, the computer-executable instructions are used to implement the second aspect and / or various possible implementation methods of the second aspect.

[0081] In the seventh aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the first aspect and / or various possible implementation methods of the first aspect; or, when executed by a processor, implements the second aspect and / or various possible implementation methods of the second aspect.

[0082] In an eighth aspect, an embodiment of the present application provides a signal transmission system for power supply, the system comprising a primary side and a secondary side; wherein the primary side is used to execute the above first aspect and / or various possible implementations of the first aspect, and the secondary side is used to execute the above second aspect and / or various possible implementations of the second aspect.

[0083] The signal transmission method, storage medium, device, and program product for power supply provided by the embodiments of the present application are configured such that a DC power supply and two modulation circuits are deployed in the primary end. The DC power supply is configured to generate a DC signal and receive an energy transmission signal based on a preset time period. The energy transmission signal is configured to characterize the power supply status of the primary end to the secondary end. If it is determined that the energy transmission signal meets the preset conditions, then for each digital identifier in the energy transmission signal, a modulation circuit corresponding to the digital identifier is determined as the target circuit. The two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit. Then, the DC signal of the DC power supply is converted into an AC signal through the target circuit, and the AC signal is sent to the secondary end. The AC signal is used to synchronously transmit electrical energy and the energy transmission signal. The digital identifier in the energy transmission signal can be embedded in the AC signal used to transmit electrical energy. Thus, when wireless power and the energy transmission signal are synchronously transmitted, there is no need to deploy a separate circuit for the transmission of the energy transmission signal, thereby avoiding an increase in the physical size of the primary end and an increase in hardware cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0085] Figure 1 Schematic diagram of the signal transmission method for power supply provided in this application Figure 1 ;

[0086] Figure 2 Schematic diagram of the signal transmission method for power supply provided in this application Figure 2 ;

[0087] Figure 3 A schematic diagram of the structure of the signal transmission system for power supply provided in this application;

[0088] Figure 4 Schematic diagram of the signal transmission method for power supply provided in this application Figure 3 ;

[0089] Figure 5 A schematic diagram of the simulation circuit structure of the signal transmission system for power supply provided in this application;

[0090] Figure 6 Schematic diagram of the signal transmission method for power supply provided in this application Figure 4 ;

[0091] Figure 7 A schematic diagram of the distribution of harmonic content of the voltage in the AC signal generated by the bipolar modulation circuit provided in this application;

[0092] Figure 8 A schematic diagram of the distribution of harmonic content of the voltage in the AC signal generated by the unipolar frequency multiplication modulation circuit provided in this application;

[0093] Figure 9 Schematic diagram of the signal transmission method for power supply provided in this application Figure 5 ;

[0094] Figure 10 Schematic diagram of the signal transmission method for power supply provided in this application Figure 6 ;

[0095] Figure 11 This is a schematic diagram of the energy transmission signal received by the simulation primary end, the voltage signal corresponding to the amplitude information of the tenth harmonic generated by the secondary end, and the generated energy transmission signal provided by this application;

[0096] Figure 12 Schematic diagram of the signal transmission method for power supply provided in this application Figure 7 ;

[0097] Figure 13 A schematic diagram of the monitoring results of the load voltage during the simulation process provided by this application;

[0098] Figure 14 Schematic diagram of the structure of the signal transmission device for power supply provided in this application Figure 1 ;

[0099] Figure 15 Schematic diagram of the structure of the signal transmission device for power supply provided in this application Figure 2 ;

[0100] Figure 16 This is a schematic diagram of the structure of the electronic device provided in this application.

[0101] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0102] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0103] Many high-tech devices, such as new energy vehicles and implantable medical devices, require the primary side to wirelessly transmit both power and data to the secondary side. The primary side can then power the secondary side with power and send status information or control the secondary side with data. The data can, for example, represent instructions to disable a function, start or stop power supply, or display error messages.

[0104] In one example, different power supply circuits can be deployed on the primary side for power and data, respectively. The two circuits are used to generate AC signals corresponding to power and data transmission, respectively, and the two AC signals are superimposed and sent to the secondary side.

[0105] However, since the above method requires deploying a separate circuit for data transmission in addition to the circuit for transmitting power at the primary end, the primary end requires a larger physical size, which makes it difficult to meet the demand for miniaturization of the primary end and the hardware cost is high.

[0106] The present application provides a signal transmission method, storage medium, device and program product for power supply to solve the above technical problems.

[0107] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0108] Figure 1 Schematic diagram of the signal transmission method for power supply provided in this application Figure 1 ,like Figure 1 As shown, the method is applied to the primary side, and the method includes:

[0109] S101. Receive an energy transmission signal based on a preset time period; wherein the energy transmission signal is used to represent a power supply status from a primary side to a secondary side.

[0110] Exemplarily, the primary end may be a charging pile, and the secondary end may be a new energy vehicle. When the secondary end is parked within a preset range of the charging pile, the primary end may wirelessly transmit energy to the secondary end to charge the secondary end, and simultaneously receive an energy transmission signal and wirelessly send it to the secondary end.

[0111] Among them, the energy transmission signal can represent the instructions for controlling the secondary side generated by the program in the primary side according to pre-set rules. For example, it can represent the instructions for controlling the secondary side to disconnect charging when the temperature control module in the primary side detects that the device in the primary side exceeds a certain temperature; it can also represent the instructions sent by the user to the primary side through the terminal device to control the secondary side to start charging.

[0112] In one example, the energy transmission signal may be received every preset time period, wherein the energy transmission signal includes at least one digital identifier, and the preset time period may be 5 seconds or 10 seconds, etc.

[0113] S102. If it is determined that the energy transmission signal meets the preset conditions, then for each digital identifier in the energy transmission signal, determine a modulation circuit corresponding to the digital identifier as a target circuit; wherein the two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit.

[0114] In one example, determining that the energy transmission signal meets the preset conditions includes: if the format of the energy transmission signal is a preset format, and the energy transmission signal only contains the first identifier and / or the second identifier, then determining that the energy transmission signal meets the preset conditions.

[0115] Exemplarily, the preset format may be a specific format such as a specific code or number, the digital identifier may be a first identifier or a second identifier, wherein the first identifier may be a binary 1 and the second identifier may be a binary 0, and the preset condition may be that the energy transmission signal contains only the numbers 1 and / or 0. If it is determined that the received energy transmission signal meets the preset condition, the digital identifiers in the energy transmission signal may be traversed to determine the currently traversed digital identifier;

[0116] According to the preset association relationship, a modulation circuit corresponding to the currently traversed digital identifier is determined as the target circuit.

[0117] Exemplarily, the preset association relationship may be a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit pre-configured in the primary side, which are used to modulate the first identifier and the second identifier respectively; wherein the bipolar modulation circuit may be a bipolar sinusoidal pulse width modulation (SPWM) circuit, and the unipolar frequency multiplication modulation circuit may be a unipolar frequency multiplication SPWM circuit.

[0118] Specifically, after receiving the energy transmission signal, the primary end may sequentially extract each digital identifier from the energy transmission signal at intervals of a preset second time period T, and determine the digital identifier as the currently traversed digital identifier. The preset second time period represents the modulation period corresponding to each digital identifier and may be determined based on actual needs, such as 1 second or 2 seconds, without limitation.

[0119] For example, the energy transmission signal includes a first digital identifier and a second digital identifier in sequence. At time t0 after receiving the energy transmission signal, the first digital identifier can be extracted and determined as the currently traversed digital identifier.

[0120] At the time (t0+T), the second digital identifier can be extracted and determined as the currently traversed digital identifier.

[0121] If it is determined that the currently traversed digital identifier is the first identifier, then based on the association relationship between the bipolar modulation circuit and the first identifier, the modulation circuit corresponding to the currently traversed digital identifier is determined to be a bipolar modulation circuit, and the bipolar modulation circuit is used as the target circuit; if it is determined that the currently traversed digital identifier is the second identifier, then based on the unipolar frequency multiplication modulation circuit corresponding to the second identifier, the modulation circuit corresponding to the currently traversed digital identifier is determined to be a unipolar frequency multiplication modulation circuit, and the unipolar frequency multiplication modulation circuit is used as the target circuit.

[0122] S103: Convert the DC power signal of the DC power supply into an AC power signal through the target circuit, and send the AC power signal to the secondary side.

[0123] In one example, a DC power supply is deployed at the primary side, and the DC power supply is used to generate a DC signal.

[0124] For example, after determining the target circuit corresponding to the digital identifier, the primary side can convert the DC power supply's DC signal into an AC signal for synchronously transmitting power and the energy transmission signal based on the target circuit corresponding to the digital identifier, and wirelessly transmit the AC signal to the secondary side. The AC signal can indicate the digital identifier.

[0125] The signal transmission method for power supply provided in the embodiment of the present application is configured with a DC power supply and two modulation circuits in the primary side, wherein the DC power supply is configured to generate a DC signal and receive an energy transmission signal based on a preset time period; wherein the energy transmission signal is configured to characterize the power supply status of the primary side to the secondary side. If it is determined that the energy transmission signal meets the preset conditions, then for each digital identifier in the energy transmission signal, a modulation circuit corresponding to the digital identifier is determined as the target circuit; wherein the two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit; then, through the target circuit, the DC power supply's DC signal is converted into an AC signal, and the AC signal is sent to the secondary side, wherein the AC signal is configured to synchronously transmit electrical energy and the energy transmission signal. The digital identifier in the energy transmission signal can be embedded in the AC signal used to transmit electrical energy. Thus, when wireless power and the energy transmission signal are synchronously transmitted, there is no need to separately deploy a circuit for transmitting the energy transmission signal, thereby avoiding an increase in the physical size of the primary side and an increase in hardware cost.

[0126] Figure 2 Schematic diagram of the signal transmission method for power supply provided in this application Figure 2 ,like Figure 2 As shown, this embodiment Figure 1 Based on the embodiment, a signal transmission method for power supply is described in detail. The method is applied to the primary side and includes:

[0127] S201: Receive an energy transmission signal based on a preset time period; wherein the energy transmission signal is used to represent a power supply status from the primary side to the secondary side.

[0128] Exemplarily, the implementation of step S201 is similar to that of step S101 , and for details, please refer to the description of step S101 , which will not be repeated here.

[0129] Specifically, Figure 3 The schematic diagram of the signal transmission system structure for power supply provided in this application is as follows: Figure 3 As shown, Figure 3 (a) in the figure is a schematic diagram of the structure of the original edge.

[0130] The primary side may include a module 301 for receiving energy transmission signals, a modulation module 302, a driving circuit 303, a DC power supply V s , inverter circuit, primary compensation capacitor C p , primary coupling coil L p; Among them, the modulation module 302 may include a bipolar modulation circuit 3021 and a unipolar modulation circuit 3022; the inverter circuit may include switch tubes S1, S2, S3, and S4, and the switch tubes may be metal-oxide-semiconductor field-effect transistors (Metal-Oxide-Semiconductor Field-Effect Transistor, referred to as MOS tubes) or insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, referred to as IGBTs), etc.

[0131] The modulation module 302 is connected to the energy transmission signal receiving module 301 and the driving circuit 303 respectively. The driving circuit 303 is also connected to the inverter circuit.

[0132] DC power supply V s The positive poles are connected to the switch tube S1 and the switch tube S3 respectively, and the DC power supply V s The negative electrodes are connected to the switch tubes S2 and S4 respectively, the switch tubes S1 and S2 are connected, and the switch tubes S3 and S4 are connected.

[0133] Primary compensation capacitor C p and the primary coupling coil L p After being connected in series, they are respectively connected to the output ends of the inverter circuit.

[0134] In an example, Figure 3 As shown in (a), the primary side can receive an energy transmission signal at preset time intervals through the energy transmission signal receiving module 301, wherein the energy transmission signal can be an instruction to instruct the secondary side to reduce the preset charging power.

[0135] S202. If it is determined that the energy transmission signal meets the preset conditions, then for each digital identifier in the energy transmission signal, determine a modulation circuit corresponding to the digital identifier as a target circuit; wherein the two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit.

[0136] In one example, determining that the energy transmission signal meets the preset conditions includes: if the format of the energy transmission signal is a preset format, and the energy transmission signal only contains the first identifier and / or the second identifier, then determining that the energy transmission signal meets the preset conditions.

[0137] Exemplarily, the implementation of step S202 is similar to that of step S102 . For details, please refer to the description of step S102 , which will not be repeated here.

[0138] In an example, Figure 3 As shown, Figure 3The energy transmission signal receiving module 301 in (a), after receiving the energy transmission signal, if it is determined that the energy transmission signal meets the preset conditions, can traverse the digital identifier in the energy transmission signal to determine the currently traversed digital identifier. The specific implementation method has been introduced in step S102 and will not be repeated here.

[0139] The introduction of the two modulation circuits and the preset association relationship can be found in the description of step S102 and will not be repeated here.

[0140] like Figure 3 As shown in (a), the energy transmission signal receiving module 301, after determining the digital identifier currently traversed, inputs the digital identifier into the modulation module 302, and the modulation module 302 determines the target circuit corresponding to the digital identifier currently traversed based on a preset association relationship.

[0141] Specifically, if the modulation module 302 determines that the currently traversed digital identifier is the first identifier, then based on the association relationship between the bipolar modulation circuit and the first identifier, it determines that the target circuit corresponding to the currently traversed digital identifier is a bipolar modulation circuit; if it determines that the currently traversed digital identifier is the second identifier, then based on the unipolar frequency multiplication modulation circuit corresponding to the second identifier, it determines that the target circuit corresponding to the currently traversed digital identifier is a unipolar frequency multiplication modulation circuit.

[0142] The modulation module 302 may determine the target circuit corresponding to the currently traversed digital identifier through software or hardware. This embodiment does not limit this and may be selected according to actual needs.

[0143] In the modulation module 302, determining the target circuit corresponding to the currently traversed digital identifier through software implementation can avoid increasing the physical size of the original side and reduce the cost required for hardware; determining the target circuit corresponding to the currently traversed digital identifier through hardware implementation can reduce the computational complexity of the algorithm and thus achieve faster response speed.

[0144] Specifically, in the modulation module 302, when determining the target circuit corresponding to the currently traversed digital identifier through hardware implementation, such as Figure 3 As shown in (a), a single-pole double-throw switch can also be deployed in the modulation module 302, wherein one end of the input end of the single-pole double-throw switch can be connected to the energy transmission signal receiving module 301, and the other end is connected to the bipolar modulation circuit 3021 or the unipolar frequency multiplication modulation circuit 3022, and the output end of the single-pole double-throw switch is connected to the drive circuit 303.

[0145] The energy transmission signal receiving module 301 inputs the digital identifier into the single-pole double-throw switch in the modulation module 302 after determining the digital identifier currently traversed.

[0146] The single-pole double-throw switch can be used to, if it is determined that the currently traversed digital identifier is the first identifier, then open the path between the single-pole double-throw switch and the bipolar modulation circuit 3021; ​​or, if it is determined that the currently traversed digital identifier is the second identifier, then open the path between the single-pole double-throw switch and the unipolar frequency multiplication modulation circuit 3022.

[0147] By determining the target circuit corresponding to the currently traversed digital identifier according to a preset association relationship, different digital identifiers can be corresponding to different target circuits.

[0148] S203 . Convert the digital identifier corresponding to the target circuit into a modulation signal through the target circuit; wherein the modulation signal represents the digital identifier.

[0149] Exemplarily, if the currently traversed digital identifier is a first identifier and the target circuit corresponding to the first identifier is a bipolar modulation circuit, the first identifier can be converted based on the bipolar modulation circuit to obtain a modulation signal corresponding to the digital identifier.

[0150] If the currently traversed digital identifier is the second identifier, and the target circuit corresponding to the second identifier is a unipolar frequency multiplication modulation circuit, the second identifier can be converted based on the unipolar frequency multiplication modulation circuit to obtain a modulation signal corresponding to the digital identifier.

[0151] That is to say, 1 and 0 can be converted separately, 1 is converted through a bipolar modulation circuit, and 0 is converted through a unipolar frequency multiplication modulation circuit, to obtain a modulation signal corresponding to 1 and a modulation signal corresponding to 0.

[0152] In an example, Figure 3 As shown in (a), after determining the target circuit corresponding to the currently traversed digital identifier, the modulation module 302 can convert the digital identifier based on the target circuit to obtain a modulation signal corresponding to the digital identifier.

[0153] By converting different digital identifiers based on their corresponding target circuits, different modulation signals representing different digital identifiers can be obtained. The digital identifiers can be integrated into the modulation signals, and then different results can be generated when different modulation signals corresponding to different digital identifiers are subsequently processed.

[0154] S204 , performing voltage and current amplification processing on the modulation signal through the driving circuit to obtain an amplified modulation signal.

[0155] In one example, a driving circuit is deployed in the primary side, and the driving circuit is used to amplify the signal.

[0156] For example, Figure 3 As shown in (a), after the modulation module 302 converts the currently traversed digital identifier to obtain a modulation signal corresponding to the digital identifier, it can input the modulation signal into the drive circuit 303. The drive circuit 303 then amplifies the voltage and current in the modulation signal to obtain an amplified modulation signal, and inputs the amplified modulation signal into the inverter circuit. The modulation signal also indicates the switching timing of each switch in the inverter circuit. The amplified modulation signal has the same digital identifier indicated by the modulation signal before amplification and the same switching timing of each switch in the inverter circuit.

[0157] In one example, after the modulation module 302 converts the first identifier to obtain a bipolar modulation signal corresponding to the first identifier, assuming that the voltage of the bipolar modulation signal is 3.3V, the voltage of the bipolar modulation signal can be increased to 20V based on the driving circuit 303.

[0158] The modulation signal is amplified by the driving circuit, and the obtained amplified modulation signal can amplify the voltage and current in the modulation signal, while not changing the digital identification indicated by the modulation signal and the switching timing of each switch tube in the control inverter circuit.

[0159] S205 , according to the amplified modulation signal, controlling the DC power supply to generate a DC signal which passes through an inverter circuit to obtain an AC signal.

[0160] In one example, a DC power supply and an inverter circuit are deployed on the primary side.

[0161] In one example, a first harmonic attenuation circuit is deployed at the primary end, and the first harmonic attenuation circuit includes a primary compensation capacitor and a primary coupling coil connected in series.

[0162] In one example, step S205 includes the following process:

[0163] According to the amplified modulation signal, the DC power supply is controlled to generate a DC signal which passes through an inverter circuit to obtain an initial AC signal; wherein the initial AC signal includes a fundamental wave and harmonics;

[0164] The harmonics in the initial AC signal are attenuated by the first harmonic attenuation circuit to obtain an AC signal.

[0165] Exemplarily, the DC power supply is any power supply that can generate a DC signal, for example, the DC power supply is AC power, and the AC power can be converted into a DC signal through a rectifier; or, the DC power supply is a battery, such as a lithium battery, lithium iron phosphate battery, etc., and the battery can output a DC signal by discharging, etc. There is no restriction on this and it can be selected according to needs.

[0166] The inverter circuit is any inverter circuit that can convert the DC signal generated by the DC power supply into an AC signal according to the amplified modulation signal. For example, the inverter circuit is Figure 3 The full-bridge inverter circuit shown in (a) includes switch tubes S1, switch tube S2, switch tube S3, and switch tube S4, or the inverter circuit is an inverter circuit including 6 switch tubes, etc. There is no limitation to this and it can be selected according to needs.

[0167] Before the inverter circuit receives the amplified modulation signal sent by the drive circuit, the state of each switch tube is closed, that is, the inverter circuit is in a non-working state; after receiving the amplified modulation signal, the inverter circuit can turn on and off each switch tube according to the switching timing corresponding to each switch tube indicated by the amplified modulation signal, and then convert the DC signal generated by the DC power supply into an AC signal through the inverter circuit.

[0168] The high voltage and high current in the amplified modulation signal can fully drive the switching tubes in the inverter circuit to be turned on or off, and then the inverter circuit can more accurately control the switching timing of each switching tube in the inverter circuit according to the indication of the amplified modulation signal, and turn on and off each switching tube, thereby more accurately generating an AC signal containing fundamental and harmonic content.

[0169] The AC signal generated by the amplified bipolar modulation signal representing the first identifier and the AC signal generated by the amplified unipolar frequency-doubled modulation signal representing the second identifier contain different amounts of preset harmonics, thereby facilitating subsequent determination by the secondary end of the digital identifier represented by the AC signal as the first identifier or the second identifier based on the amount of the preset harmonics. The preset harmonics may be, for example, the tenth harmonic or the nineteenth harmonic, which is not limited and can be selected based on actual needs.

[0170] In some embodiments, as Figure 3 As shown in (a), the inverter circuit converts the DC power supply V s The generated DC signal is converted to an initial AC signal by an inverter circuit and then passed through a first harmonic attenuation circuit to attenuate the harmonics in the initial AC signal, thereby obtaining an AC signal. The initial AC signal may be a high-frequency square wave AC signal including a fundamental wave and harmonics.

[0171] The primary compensation capacitor C in series in the first harmonic attenuation circuit p and the primary coupling coil L p , can be pre-selected when deployed in the original edge to meet the ω1L vp =1 / ω1Cvp The primary compensation capacitor C p and the primary coupling coil L p , where ω1 is the angular frequency of the signal transmission system for power supply, ω1=2πf1, f1 is the frequency of the fundamental wave in the signal of the signal transmission system for power supply, which is preset according to actual needs, L vp is the primary coupling coil L p The self-inductance value, C vp is the primary compensation capacitor C p The capacitance value of the primary compensation capacitor C p and the primary coupling coil L p Series resonance can be achieved at the fundamental frequency f1, thereby providing low impedance to the fundamental wave in the initial AC signal and high impedance to the harmonics in the initial AC signal, thereby attenuating the harmonics in the initial AC signal to obtain an AC signal containing the fundamental wave and residual harmonics.

[0172] In an example, Figure 3 As shown in (a), after the primary side increases the voltage of the bipolar modulation signal to 20V based on the driving circuit 303, the 20V bipolar modulation signal can be input into the inverter circuit to drive each switch tube in the inverter circuit. According to the switching timing of each switch tube indicated by the 20V bipolar modulation signal, it is turned on and off, thereby controlling the DC power supply V s The generated DC signal passes through the inverter circuit to obtain the initial AC signal; then, the initial AC signal passes through the primary compensation capacitor C that is in series resonance at the fundamental frequency. p and the primary coupling coil L p , the harmonics in the initial AC signal are attenuated to obtain an AC signal.

[0173] S206: Send an AC signal to the secondary side.

[0174] For example, Figure 3 As shown, Figure 3 (a) in the equation is the original edge. Figure 3 (b) is the secondary side end, which may include the secondary coupling coil L s , and the secondary coupling coil L s In the closed loop, the secondary coupling coil L s and the primary coupling coil L p Mutual inductance M can be generated between them through magnetic coupling.

[0175] After the primary side generates an AC signal based on the amplified modulation signal, it passes through the primary side coupling coil L p The current in the AC signal is coupled to the primary side of the coil L pAn alternating magnetic field is excited around the secondary coupling coil L s In this alternating magnetic field, therefore, the secondary coupling coil L s Can be coupled to the primary coil L p The magnetic coupling between the secondary side coupling coil L s The two ends of the circuit induce a voltage with the same fundamental frequency and harmonic frequency as the AC signal, thereby realizing that the primary end can wirelessly send the AC signal with digital identification to the secondary end.

[0176] The signal transmission method for power supply provided in this embodiment is that the primary end generates a corresponding AC signal for each digital identifier in the energy transmission signal in sequence, and transmits each AC signal to the secondary end, and different digital identifiers use different modulation circuits. Therefore, the preset harmonic content in the AC signal corresponding to different digital identifiers is different. Therefore, based on the preset harmonic content in the AC signal, the energy transmission signal can be transmitted from the primary end to the secondary end. At the same time, the current and voltage corresponding to the fundamental wave in the AC signal are used to transmit electric energy from the primary end to the secondary end. The electric energy is used to charge the secondary end, thereby realizing the synchronous transmission of wireless electric power and the energy transmission signal.

[0177] On the basis of the circuit used for power transmission, the primary side only adds hardware or software for using different modulation circuits for different digital identifiers in the energy transmission signal. Therefore, a significant increase in the physical size of the primary side is avoided and high hardware costs are avoided.

[0178] Furthermore, since the electric energy and the energy transmission signal are wirelessly transmitted based on the fundamental wave and the preset harmonics in the alternating current signal respectively, the mutual interference between the electric energy and the energy transmission signal during the transmission process can be reduced.

[0179] In addition, since the fundamental wave in the AC signal generally accounts for more than 90%, transmitting electric energy from the primary side to the secondary side through the current and voltage corresponding to the fundamental wave in the AC signal can maximize power utilization and thus improve the efficiency of electric energy transmission, thereby achieving efficient charging of the secondary side.

[0180] Figure 4 Schematic diagram of the signal transmission method for power supply provided in this application Figure 3 ,like Figure 4 As shown, this embodiment is based on the simulation circuit. Figure 2 A variation of the embodiment is provided, providing a signal transmission method for power supply, which is applied to a primary side and includes:

[0181] S401: Receive an energy transmission signal based on a preset time period; wherein the energy transmission signal is used to represent the power supply status of the primary side to the secondary side.

[0182] Exemplarily, the implementation of step S401 is similar to that of step S201 . For details, please refer to the description of step S201 , which will not be repeated here.

[0183] Specifically, Figure 5 The schematic diagram of the simulation circuit structure of the signal transmission system for power supply provided in this application is as follows: Figure 5 As shown, Figure 5 (a) in the figure is a schematic diagram of the simulation circuit structure of the primary side.

[0184] The primary side may include a receiving energy transmission signal module 501, a single-pole double-throw switch 502, a bipolar modulation circuit 5031 and a unipolar frequency multiplication modulation circuit 5032, a DC power supply V in , resistor R p1 , capacitor C p1 , simulation inverter circuit, first harmonic attenuation circuit; wherein, the simulation inverter circuit may include 4 MOS tubes, K1, K2, K3, K4 are switches corresponding to the 4 MOS tubes respectively; the first harmonic attenuation circuit includes a primary compensation capacitor C p2 and the primary coupling coil L p1 , primary compensation capacitor C p2 and the primary coupling coil L p1 At the fundamental frequency f1, the series resonance is applied, and the primary compensation capacitor C p2 and the primary coupling coil L p1 Specific parameter settings and Figure 2 In the embodiment, the primary compensation capacitor C p and the primary coupling coil L p The parameter settings are similar and will not be repeated here.

[0185] One end of the input end of the single-pole double-throw switch 502 can be connected to the energy transmission signal receiving module 501, and the other end is connected to the bipolar modulation circuit 5031 or the unipolar frequency multiplication modulation circuit 5032. The output end of the single-pole double-throw switch is respectively connected to the switch K1, switch K2, switch K3, and switch K4 in the simulation inverter circuit.

[0186] DC power supply V in The positive electrode and the resistor R p1 After connecting in series, the resistor R p1 Connect to the MOS tube corresponding to switch K1 and the MOS tube corresponding to switch K3 respectively, and the DC power supply V in The negative electrodes of the switches are connected to the MOS tubes corresponding to switch K2 and switch K4, the MOS tubes corresponding to switch K1 and switch K2, and the MOS tubes corresponding to switch K3 and switch K4 respectively; the capacitor C p1 Respectively with resistor R p1 , DC power supply Vin negative connection.

[0187] Primary compensation capacitor C p2 and the primary coupling coil L p1 After being connected in series, they are respectively connected to the output ends of the simulated inverter circuit.

[0188] It should be noted that in order to speed up the simulation, Figure 2 The driving circuit of the embodiment omits the step of "amplifying the voltage and current of the modulation signal through the driving circuit to obtain the amplified modulation signal". In actual implementation, it is still necessary to Figure 2 The same as the embodiment, with the addition of a driving circuit and this step.

[0189] In an example, Figure 5 As shown in (a), the primary end can receive the energy transmission signal at every preset time period through the energy transmission signal receiving module 501.

[0190] S402. If it is determined that the energy transmission signal meets the preset conditions, then for each digital identifier in the energy transmission signal, determine the modulation circuit corresponding to the digital identifier as the target circuit; wherein the two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit.

[0191] In one example, determining that the energy transmission signal meets the preset conditions includes: if the format of the energy transmission signal is a preset format, and the energy transmission signal only contains the first identifier and / or the second identifier, then determining that the energy transmission signal meets the preset conditions.

[0192] Exemplarily, the implementation of step S402 is similar to that of step S202 . For details, please refer to the description of step S202 , which will not be repeated here.

[0193] In an example, Figure 5 As shown, Figure 5 The energy transmission signal receiving module 501 in (a), after receiving the energy transmission signal, if it is determined that the energy transmission signal meets the preset conditions, can traverse the digital identifier in the energy transmission signal to determine the currently traversed digital identifier. The specific implementation method is similar to the implementation method of step S202. For details, please refer to the description in step S202, which will not be repeated here.

[0194] In some embodiments, if the primary end does not receive an energy transmission signal, that is, the primary end only transmits electrical energy to the secondary end and does not need to transmit an energy transmission signal, the currently traversed digital identifier can be preset as a preset digital identifier, and the energy transmission signal received by the primary end can be preset to not be in the form of more than a preset number of preset digital identifiers. For example, when the primary end does not receive an energy transmission signal, the currently traversed digital identifier can be preset as the first identifier.

[0195] After determining the currently traversed digital identifier, the modulation circuit corresponding to the currently traversed digital identifier is determined according to the preset association relationship. The specific implementation method is similar to the implementation method based on the single-pole double-throw switch in step S202. For details, please refer to the description based on the single-pole double-throw switch in step S202, which will not be repeated here.

[0196] In an example, Figure 5 As shown in (a), assuming that the currently traversed digital identifier is the second identifier 0, if the single-pole double-throw switch 502 receives the second identifier 0 sent by the receiving energy transmission signal module 501, it can be determined based on the preset association relationship that the modulation circuit associated with the second identifier 0 is the unipolar frequency multiplication modulation circuit 5032.

[0197] S403 . Convert the digital identifier corresponding to the target circuit into a modulation signal through the target circuit; wherein the modulation signal represents the digital identifier.

[0198] Exemplarily, the implementation of step S403 is similar to that of step S203 . For details, please refer to the description of step S203 , which will not be repeated here.

[0199] In an example, Figure 5 As shown in (a), assuming that the currently traversed digital identifier is the second identifier 0, the single-pole double-throw switch 502, after determining that the modulation circuit associated with the second identifier 0 is the unipolar frequency multiplication modulation circuit 5032, converts the second identifier 0 into a corresponding unipolar frequency multiplication modulation signal based on the unipolar frequency multiplication modulation circuit 5032. The unipolar frequency multiplication modulation signal corresponding to the second identifier 0 indicates the second identifier 0.

[0200] S404 , according to the modulated signal, controlling the DC power supply to generate a DC signal which passes through an inverter circuit to obtain an AC signal.

[0201] Exemplarily, the implementation of step S404 is similar to the implementation of step S205. For details, please refer to the description of step S205, which will not be repeated here.

[0202] Specifically, step S404 is modified as follows based on step S205:

[0203] The first modification point: In step S404, the simulation circuit omits the driving circuit in order to speed up the simulation speed, and thus omits the step of "amplifying the voltage and current of the modulation signal through the driving circuit to obtain the amplified modulation signal". Then, in step S404, the amplified modulation signal in S205 can be modified to the modulation signal.

[0204] The second modification point: Figure 5 As shown in (a), in step S404, after the DC power supply generates a DC signal in step S205, the DC signal is also connected to the serial resistor R p1 and capacitor C p1 , the DC signal is filtered to remove noise, and a denoised DC signal is obtained; then, according to the modulation signal, the denoised DC signal is controlled to pass through the simulated inverter circuit to obtain an AC signal.

[0205] Through the series resistor R p1 and capacitor C p1 Filtering the noise of the DC signal can prevent the noise in the DC signal from causing false triggering of the MOS tube in the simulated inverter circuit, which may cause AC signal distortion; it can also prevent the voltage or current stress fluctuations caused by the noise in the DC signal from accelerating the aging of the devices on the primary side.

[0206] In an example, Figure 5 As shown in (a), after the primary side inputs the modulation signal into the simulated inverter circuit, it drives each switch in the simulated inverter circuit to turn on and off according to the switching timing of each switch indicated by the modulation signal, thereby controlling the de-noised DC signal to pass through the inverter circuit to obtain the initial AC signal; then, the initial AC signal passes through the primary compensation capacitor C that is in series resonance at the fundamental frequency. p2 and the primary coupling coil L p1 , the harmonics in the initial AC signal are attenuated to obtain an AC signal.

[0207] S405: Send an AC signal to the secondary side.

[0208] Exemplarily, the implementation of step S405 is similar to the implementation of step S206. For details, please refer to the description of step S206, which will not be repeated here.

[0209] In an example, Figure 5 As shown, the secondary coupling coil L s1 and the primary coupling coil L p1 The magnetic coupling between the two transmits the AC signal to Figure 5 (b) The secondary side end indicated.

[0210] Figure 6 Schematic diagram of the signal transmission method for power supply provided in this application Figure 4 ,like Figure 6 As shown, the method is applied to the secondary side, and the method includes:

[0211] S601. Receive an AC signal transmitted by the primary end; wherein, the AC signal refers to an AC signal generated after the primary end receives an energy transmission signal and converts the digital identifier corresponding to the modulation circuit in the energy transmission signal into a modulation signal through a modulation circuit.

[0212] In one example, the secondary side is an electronic device to be powered.

[0213] For example, the explanation of the primary side, secondary side, energy transmission signal, and digital identification can refer to the description in step S101, and the implementation method of the primary side generating the AC signal can refer to the description in steps S101 to S104, which will not be repeated here.

[0214] In one example, the primary side generates an AC signal and wirelessly transmits the AC signal to the secondary side, which can then wirelessly receive the AC signal. The AC signal can be used to power the secondary side.

[0215] S602 : Enhance the preset harmonics in the AC signal through a harmonic enhancement circuit to obtain an enhanced AC signal.

[0216] In one example, a harmonic enhancement circuit is deployed in the secondary side.

[0217] Exemplarily, the harmonic enhancement circuit may be any filter circuit that has low impedance to preset harmonics and high impedance to the fundamental wave and other harmonics, and there is no limitation to this.

[0218] The preset harmonics may be any harmonics with different harmonic contents in alternating current signals with different digital identifiers in the energy transmission signal, and there is no limitation to this.

[0219] Figure 7 A schematic diagram of the distribution of harmonic content of the voltage in the AC signal generated by the bipolar modulation circuit provided in this application; Figure 8 This is a schematic diagram of the distribution of harmonic content of the voltage in the AC signal generated by the unipolar frequency multiplication modulation circuit provided in this application.

[0220] like Figure 7 and Figure 8 As shown, the horizontal axis represents the order of harmonics, the vertical axis represents the voltage amplitude content of harmonics, the fundamental frequency is 100kHz, and the fundamental voltage amplitude is 34.26. Figure 7 and Figure 8It can be seen that at the tenth harmonic, the harmonic content of the voltage in the AC signal generated by the bipolar modulation signal is the most different from the harmonic content of the voltage in the AC signal generated by the unipolar frequency-doubled modulation signal. Therefore, based on the harmonic content in the AC signal, it is possible to more accurately determine which modulation circuit generates the AC signal and then determine the digital identifier indicated by the AC signal. Therefore, in each embodiment of the present application, the preset harmonic is the tenth harmonic as an example for explanation.

[0221] In one example, after receiving the AC signal transmitted by the primary end, the secondary end can, based on the harmonic enhancement circuit, provide low impedance to the tenth harmonic in the AC signal and high impedance to the fundamental wave and other harmonics, thereby obtaining an enhanced AC signal.

[0222] S603 , performing voltage amplification processing on the enhanced AC signal through a signal amplification circuit to obtain an amplified AC signal.

[0223] In one example, a signal amplification circuit is deployed in the secondary side.

[0224] Exemplarily, the signal amplifying circuit may be any circuit for amplifying the voltage of a signal, and is not limited thereto.

[0225] In one example, after obtaining the enhanced AC signal, the secondary side may amplify the voltage of the enhanced AC signal based on the signal amplification circuit to obtain an amplified AC signal.

[0226] S604: Determine an energy transmission signal according to the voltage of the amplified alternating current signal.

[0227] Exemplarily, after obtaining the voltage in the amplified AC signal, the secondary side can determine the content of preset harmonics within each preset time period based on the voltage in the amplified AC signal; then, determine a digital identifier based on the content of the preset harmonics; and then, determine an energy transmission signal based on the determined digital identifier.

[0228] In one example, after obtaining the voltage in the amplified AC signal, the secondary end can determine the content of the tenth harmonic within each preset time period based on the voltage in the amplified AC signal; then, determine the digital identifier based on the content of the tenth harmonic; then, splice the determined digital identifiers in chronological order to obtain an energy transmission signal.

[0229] The signal transmission method for power supply provided in the embodiment of the present application receives an AC signal transmitted by the primary side; wherein the AC signal refers to an AC signal generated after the primary side receives the energy transmission signal and converts the digital identifier corresponding to the modulation circuit in the energy transmission signal into a modulation signal through a modulation circuit; then, the preset harmonics in the AC signal are enhanced by the harmonic enhancement circuit to obtain an enhanced AC signal; then, the enhanced AC signal is amplified by the signal amplification circuit to obtain an amplified AC signal; finally, the energy transmission signal is determined based on the voltage in the amplified AC signal, so that the energy transmission signal can be simultaneously determined from the AC signal used to power the secondary side, and there is no need to deploy a separation circuit to separate the AC signal used to transmit electric energy and the AC signal used to transmit the energy transmission signal from a signal superimposed with two AC signals, which can make the physical size of the secondary side smaller and the cost lower.

[0230] Figure 9 Schematic diagram of the signal transmission method for power supply provided in this application Figure 5 ,like Figure 9 As shown, this embodiment is Figure 6 A variation of the embodiment is provided, providing a signal transmission method for power supply, which is applied to a secondary side. The method includes:

[0231] S901. Receive an AC signal transmitted by the primary end; wherein, the AC signal refers to an AC signal generated after the primary end receives an energy transmission signal and converts the digital identifier corresponding to the modulation circuit in the energy transmission signal into a modulation signal through a modulation circuit.

[0232] Exemplarily, the implementation of step S901 is similar to the implementation of sending the AC signal to the secondary side in step S206. For details, please refer to the description of step S206, which will not be repeated here.

[0233] S902 : Enhance the preset harmonics in the AC signal through a harmonic enhancement circuit to obtain an enhanced AC signal.

[0234] Exemplarily, the implementation of step S902 is similar to the implementation of step S602. For details, please refer to the description of step S602, which will not be repeated here.

[0235] like Figure 3 As shown, Figure 3 (b) represents the secondary side, which may include a secondary coupling coil L s, harmonic enhancement circuit 304, signal amplification circuit 305, voltage sampling circuit 306, energy transmission signal generation module 307, rectifier circuit, filter capacitor Co, and load R Load The rectifier circuit may include a full-wave rectifier circuit of MOS tube M1, MOS tube M2, MOS tube M3, and MOS tube M4; the load R Load It can be a battery in the secondary side, or an electronic device in the secondary side that needs to be directly powered.

[0236] Secondary coupling coil L s The two ends of the filter capacitor Co and the load R can be connected to the two ends of the input of the rectifier circuit respectively, and connected to the harmonic enhancement circuit 304 respectively; Load After parallel connection, they are connected to the output ends of the rectifier circuit; the signal amplification circuit 305 is connected to the harmonic enhancement circuit 304 and the voltage sampling circuit 306 respectively, and the voltage sampling circuit 306 is also connected to the energy transmission signal generation module 307.

[0237] In an example, Figure 3 As shown in (b), in one example, the secondary side is coupled to the secondary side through the coil L. s After receiving the AC signal transmitted from the primary end, the harmonic enhancement circuit 304 can provide low impedance to the tenth harmonic in the AC signal and high impedance to the fundamental wave and other harmonics, thereby obtaining an enhanced AC signal.

[0238] By enhancing the preset harmonics in the AC signal based on the harmonic enhancement circuit, the content of the preset harmonics in the AC signal can be increased, making it easier to distinguish digital identifiers based on the content of the preset harmonics in the AC signal.

[0239] S903 , performing voltage amplification processing on the enhanced AC signal through a signal amplification circuit to obtain an amplified AC signal.

[0240] Exemplarily, the implementation of step S903 is similar to that of step S603 . For details, please refer to the description of step S603 , which will not be repeated here.

[0241] In an example, Figure 3 As shown in (b), after obtaining the enhanced AC signal, the secondary side can amplify the voltage of the enhanced AC signal based on the signal amplification circuit 305 to obtain an amplified AC signal.

[0242] By amplifying the voltage in the enhanced AC signal based on a signal amplification circuit, the content of preset harmonics in the AC signal can be further increased, further facilitating subsequent differentiation of digital identifiers based on the content of preset harmonics in the AC signal.

[0243] S904: Determine current amplitude information of the preset harmonic according to the voltage in the amplified AC signal.

[0244] In one example, step S904 includes: performing a time-domain to frequency-domain conversion process on the voltage in the amplified AC signal based on a preset Fourier algorithm to obtain current amplitude information of the preset harmonic.

[0245] For example, the preset Fourier algorithm can be any Fourier algorithm for converting voltage from the time domain to the frequency domain, without limitation. Converting the voltage from the time domain to the frequency domain can be understood as decomposing the current amplitude information corresponding to each order of harmonics from the voltage. The amplitude information represents the intensity of the voltage corresponding to the harmonic, and the voltage intensity of the harmonic is positively correlated with the amplitude information of the harmonic.

[0246] In an example, Figure 3 As shown in (b), after the amplified AC signal is obtained at the secondary end, the voltage in the amplified AC signal can be obtained through the voltage sampling circuit 306, and the voltage in the amplified AC signal is input into the energy transmission signal generation module 307. Then, the energy transmission signal generation module 307 performs a time domain to frequency domain conversion process on the voltage in the amplified AC signal based on a preset Fourier algorithm according to a preset time period to obtain the current amplitude information of each order harmonic, and then selects the current amplitude information of the tenth harmonic from the current amplitude information of each order harmonic.

[0247] By performing a time-domain to frequency-domain conversion process on the voltage in the amplified AC signal based on a preset Fourier algorithm, the current amplitude information of the preset harmonics can be extracted from the voltage in the amplified AC signal.

[0248] In some embodiments, within a preset time period, the voltage in the amplified AC signal can also be converted from the time domain to the frequency domain multiple times based on a preset Fourier algorithm to obtain multiple groups of initial current amplitude information of each order harmonic, and then the initial current amplitude information of the tenth harmonic is selected from each group of initial current amplitude information of each order harmonic, and then the average value of the initial current amplitude information of each tenth harmonic is calculated to obtain the current amplitude information of the tenth harmonic.

[0249] By calculating the average value of the initial current amplitude information of the tenth harmonic calculated multiple times based on the preset Fourier algorithm within a preset time period, the current amplitude information of the tenth harmonic can be obtained, which can more accurately reflect the intensity of the tenth harmonic within the preset time period and avoid errors in some initial current amplitude information.

[0250] S905: Determine a digital identifier according to the current amplitude information.

[0251] In one example, step S905 includes the following process:

[0252] If the current amplitude information is greater than a preset amplitude threshold, determining the digital identifier as the first identifier;

[0253] If the current amplitude information is less than or equal to the preset amplitude threshold, the digital identifier is determined to be the second identifier.

[0254] For example, the preset amplitude threshold may be any value between two pieces of historical amplitude information indicating the amplified alternating current signal with different digital identifiers in the energy transmission signal.

[0255] like Figure 7 and Figure 8 As shown, when the voltage amplitude of the fundamental wave is the same, at the tenth harmonic, the harmonic content of the voltage in the AC signal indicating the first identifier generated by the bipolar modulation signal is higher than the harmonic content of the voltage in the AC signal indicating the second identifier generated by the unipolar frequency-doubled modulation signal. Therefore, at the tenth harmonic, the amplitude of the tenth harmonic in the AC signal indicating the first identifier generated by the bipolar modulation signal is higher than the amplitude of the tenth harmonic in the AC signal indicating the second identifier generated by the unipolar frequency-doubled modulation signal. The preset amplitude threshold can be any value between the two historical amplitudes of the amplified AC signal indicating the first identifier and the amplified AC signal indicating the second identifier. Then, by comparing the current amplitude information in the amplified AC signal with the preset amplitude threshold, it can be determined whether the amplified AC signal indicates the first identifier or the second identifier in the energy transmission signal.

[0256] In an example, Figure 3 As shown in (b), after the energy transmission signal generation module 307 in the secondary side obtains the current amplitude information of the tenth harmonic within each preset time period, if it is determined that the current amplitude information is greater than the preset amplitude threshold, the digital identifier is determined to be the first identifier 1; if it is determined that the current amplitude information is less than or equal to the preset amplitude threshold, the digital identifier is determined to be the second identifier 0.

[0257] S906: Determine an energy transmission signal according to the determined digital identifier.

[0258] For example, after determining the digital identifiers in sequence, the secondary side may splice the digital identifiers according to the obtained time to obtain the energy transmission signal.

[0259] In an example, Figure 3As shown in (b), assuming that the digital identifiers determined in chronological order by the energy transmission signal generation module 307 are the first identifier 1 and the second identifier 0, the energy transmission signal is determined to be binary 10.

[0260] The above steps S904 to S906, i.e., the process of the secondary side determining the energy transfer signal according to the voltage in the amplified AC signal, are all implemented by a software algorithm, thus avoiding increasing the physical size of the secondary side.

[0261] S907 . Convert the AC signal into a DC power supply signal through a rectifier circuit; wherein the power supply signal is used to supply power to the secondary side.

[0262] In one example, a rectifier circuit is deployed in the secondary side.

[0263] Exemplarily, the rectifier circuit may be a full-wave rectifier circuit or an active rectifier circuit, etc.

[0264] In one example, after receiving the AC signal, the secondary side can also convert the AC signal into a DC power supply signal through a full-wave rectifier circuit.

[0265] In another example, Figure 3 As shown in (b), the AC signal can also be converted into an initial DC power supply signal through a full-wave rectifier circuit including MOS transistors D1, D2, D3, and D4; and the initial power supply signal is then subjected to noise reduction processing through a filter capacitor Co to obtain a power supply signal.

[0266] The filter capacitor Co is used to perform noise reduction processing on the initial power supply signal to obtain a power supply signal, thereby improving the efficiency of powering the secondary side.

[0267] Figure 10 Schematic diagram of the signal transmission method for power supply provided in this application Figure 6 ,like Figure 10 As shown, this embodiment is based on the simulation circuit. Figure 9 A variation of the embodiment is provided, providing a signal transmission method for power supply, which is applied to a secondary side. The method includes:

[0268] S1001. Receive an AC signal transmitted by the primary end; wherein, the AC signal refers to an AC signal generated after the primary end receives an energy transmission signal and converts the digital identifier corresponding to the modulation circuit in the energy transmission signal into a modulation signal through a modulation circuit.

[0269] Exemplarily, the implementation of step S1001 is similar to the implementation of sending the AC signal to the secondary side in step S206. For details, please refer to the description of step S206, which will not be repeated here.

[0270] S1002 : Attenuate the harmonics in the AC signal through a second harmonic attenuation circuit to obtain a target AC signal.

[0271] In one example, a second harmonic attenuation circuit is deployed in the secondary side, and the second harmonic attenuation circuit includes a secondary side compensation capacitor and a secondary side coupling coil connected in series.

[0272] For example, Figure 5 As shown, Figure 5 (b) in FIG. 5 represents the secondary side, which may include a second harmonic attenuation circuit, a harmonic enhancement circuit 505, a signal amplification circuit 506, a voltmeter 507, a tenth harmonic amplitude generation module 508, a digital-to-analog converter 509, a voltage comparator 510, an energy transfer signal generation module 511, and a load R s .

[0273] The second harmonic attenuation circuit includes a secondary coupling coil L connected in series. s1 and the secondary compensation capacitor C s1 .

[0274] After the load R5 and the harmonic enhancement circuit 505 are connected in parallel, the secondary coupling coil L s1 and the secondary compensation capacitor C s1 In series, the signal amplification circuit 506 is connected to the harmonic enhancement circuit 505 and the voltmeter 507 respectively, the tenth harmonic amplitude generation module 508 is connected to the voltmeter 507 and the digital-to-analog converter 509 respectively, and the voltage comparator 510 is connected to the digital-to-analog converter 509 and the energy transmission information generation module 511 respectively.

[0275] The secondary coupling coil L in series in the second harmonic attenuation circuit s1 and the secondary compensation capacitor C s1 , can be pre-selected to meet ω1L when deployed in the secondary side vs1 =1 / ω1C vs1 The secondary coupling coil L s1 and the secondary compensation capacitor C s1 , where L vs1 is the secondary coupling coil L s1 The self-inductance value, C vs1 is the secondary side compensation capacitor C s1 The capacitance value of the secondary coupling coil L s1 and the secondary compensation capacitor C s1 Series resonance can be achieved at the fundamental frequency f1, thereby providing low impedance to the fundamental wave in the AC signal and high impedance to the harmonics in the AC signal. The harmonics in the AC signal can then be further attenuated to obtain a target AC signal containing the fundamental wave and residual harmonics.

[0276] To verify Figure 5 Is the simulation circuit structure of the signal transmission system for power supply effective? Figure 5 A voltmeter 513, an oscilloscope 512, and an oscilloscope 514 are added. The voltmeter 513 is used to monitor the voltage of the load R5; the oscilloscope 514 is used to display the voltage value obtained by the voltmeter 513; the oscilloscope 512 is used to respectively display the voltage value in the signal 504; the output of the digital-to-analog converter 509 represents the voltage value corresponding to the current amplitude of the tenth harmonic; and the output of the energy transmission signal generation module 511 represents the voltage value corresponding to each digital identifier in the energy transmission signal determined by the secondary side. Among them, the signal 504 refers to the voltage signal corresponding to each digital identifier in the energy transmission signal received by the primary side.

[0277] In an example, Figure 5 As shown in (b), the secondary side is connected to the secondary side through the coupling coil L. s1 After receiving the AC signal sent by the primary side, it can be coupled to the secondary side through the coil L s1 and the secondary compensation capacitor C s1 Resonate at the fundamental wave f1 frequency, further attenuate the harmonics of the AC signal, and obtain the target AC signal containing the fundamental wave and residual harmonics.

[0278] S1003 : Enhance the preset harmonics in the target AC power signal through a harmonic enhancement circuit to obtain an enhanced target AC power signal.

[0279] Exemplarily, the implementation of step S1003 is similar to the implementation of step S902. For details, please refer to the description of step S902, which will not be repeated here.

[0280] In an example, Figure 5 As shown in (b), after obtaining the target AC signal, the secondary side can, based on the harmonic enhancement circuit 505, provide low impedance to the tenth harmonic in the target AC signal and high impedance to the fundamental wave and other harmonics, thereby obtaining an enhanced target AC signal.

[0281] S1004 , performing voltage amplification processing on the enhanced target AC signal through a signal amplification circuit to obtain an amplified target AC signal.

[0282] Exemplarily, the implementation of step S1004 is similar to the implementation of step S903. For details, please refer to the description of step S903, which will not be repeated here.

[0283] In an example, Figure 5As shown in (b), after obtaining the enhanced target AC signal, the secondary side can amplify the voltage of the enhanced target AC signal based on the signal amplification circuit 506 to obtain an amplified target AC signal.

[0284] S1005 : Determine current amplitude information of a preset harmonic according to the voltage in the amplified target AC power signal.

[0285] Exemplarily, the implementation of step S1005 is similar to the implementation of step S904. For details, please refer to the description of step S904, which will not be repeated here.

[0286] In an example, Figure 5 As shown in (b), the secondary side can monitor the voltage of the amplified target AC signal in the signal amplification circuit 506 through the voltmeter 507, and input the voltage of the amplified target AC signal into the tenth harmonic amplitude generation module 508. The tenth harmonic amplitude generation module 508 converts the voltage of the amplified target AC signal from the time domain to the frequency domain based on a preset time period and a preset Fourier algorithm to obtain the current amplitude information of the tenth harmonic.

[0287] S1006: Determine a digital identifier based on the current amplitude information.

[0288] For example, Figure 5 As shown in (b), a voltage signal corresponding to a preset voltage threshold can be pre-generated and connected to the reverse input terminal of the voltage comparator 510. The voltage comparator 510 is pre-configured to output a 1V amplitude voltage signal if the voltage at the positive input terminal is greater than the voltage at the reverse input terminal; and to output a 0V amplitude voltage signal if the voltage at the positive input terminal is less than or equal to the voltage at the reverse input terminal. The preset voltage threshold can be a voltage value corresponding to the preset amplitude threshold.

[0289] For each preset time period, after obtaining the current amplitude information of the tenth harmonic, the tenth harmonic amplitude generating module 508 inputs the current amplitude information of the tenth harmonic into the digital-to-analog converter 509, which converts the current amplitude information of the tenth harmonic into a voltage signal corresponding to the current amplitude information.

[0290] The digital-to-analog converter 509 inputs the voltage signal corresponding to the current amplitude information into the positive input terminal of the voltage comparator 510. The voltage comparator 510 determines that if the voltage in the voltage signal corresponding to the current amplitude information is greater than the preset voltage threshold, it outputs a 1V amplitude voltage signal to the energy transmission signal generation module 511. If the voltage in the voltage signal corresponding to the current amplitude information is less than or equal to the preset voltage threshold, it outputs a 0V amplitude voltage signal to the energy transmission signal generation module 511.

[0291] If the energy transmission signal generating module 511 receives a voltage signal with an amplitude of 1V, it determines that the digital identifier is the first identifier; if it receives a voltage signal with an amplitude of 0V, it determines that the digital identifier is the second identifier.

[0292] By using a digital-to-analog converter to convert the current amplitude information of the preset harmonic into a voltage signal corresponding to the current amplitude information, and then using a voltage comparator to determine the digital identifier by comparing the voltage in the voltage signal corresponding to the current amplitude information with a preset voltage threshold, the computational complexity of the software algorithm can be reduced, thereby achieving a faster response speed.

[0293] S1007: Determine an energy transmission signal according to the determined digital identifier.

[0294] Exemplarily, the implementation of step S1007 is similar to the implementation of step S906. For details, please refer to the description of step S906, which will not be repeated here.

[0295] In an example, Figure 5 As shown in (b), assuming that the digital identifiers determined in chronological order by the energy transmission signal generation module 511 are the second identifier, the first identifier, and the second identifier, the energy transmission signal can be determined to be 010 in binary.

[0296] Figure 11 The energy transmission signal received by the primary side of the simulation provided by this application, the voltage signal corresponding to the amplitude information of the tenth harmonic generated by the secondary side, and the schematic diagram of the generated energy transmission signal, as shown in FIG. Figure 11 As shown, Figure 11 (a) represents Figure 5 (b) The voltage value of signal 504 (i.e., the voltage signal corresponding to each digital identifier in the energy transmission signal received by the primary end), where the horizontal axis represents time (unit: 10 -3 seconds), the vertical axis represents the voltage value;

[0297] Figure 11 (b) represents Figure 5(b) The output of the digital-to-analog converter 509 represents the voltage value corresponding to the current amplitude information of the tenth harmonic, and VRF represents the preset voltage threshold. The meanings of the horizontal and vertical axes are the same as those of Figure 11 (a) is the same as

[0298] Figure 11 (c) represents Figure 5 (b) The voltage output by the energy transmission signal module 511 is generated, that is, the voltage value corresponding to each digital identifier in the energy transmission signal received by the secondary side, where the meaning of the horizontal axis and the vertical axis are the same as Figure 11 Same as (a).

[0299] Because the energy transfer signal takes time to transmit from the primary side to the secondary side, the voltage value corresponding to the same digital identifier is Figure 11 (a) The time of appearance will be longer than Figure 11 (b) and Figure 11 (c) It appeared early.

[0300] In this simulation, Figure 11 In (a), between 0.5 and t1, it indicates an energy transmission signal received by the primary end. The energy transmission signal includes three digital identifiers, namely the second identifier 0, the first identifier 1, and the second identifier 0. The preset time period is t2, where t2 is (t1-0.5) / 3. Figure 11 As shown in (a), starting from 0.5, the voltage values ​​corresponding to the first t2 time period to the third t2 time period are: 0V, 1V, 0V.

[0301] like Figure 11 As shown in (b), among the voltage values ​​corresponding to the current amplitude information of the tenth harmonic, the voltage value from t3 to 1 represents Figure 11 The voltage value corresponding to the current amplitude information of the tenth harmonic corresponding to the digital identifier between 0.5 and t1 in (a) is, starting from t3, the voltage values ​​corresponding to the first t2 time period to the third t2 time period are: less than the preset voltage threshold VRF, greater than the preset voltage threshold VRF, and less than the preset voltage threshold VRF, which conforms to the correspondence between the preset voltage threshold and the digital identifier. Therefore, it can be determined that the current amplitude information of the tenth harmonic output by the digital-to-analog converter 509 is correct.

[0302] like Figure 11 As shown in (c), in the voltage signal output by the energy transmission signal generating module 511, the digital identifier corresponding to the energy transmission signal represented by t3 to 1 corresponds to Figure 11 (a) The digital identifiers indicated between 0.5 and t1, Figure 11In (c), starting from t3, the voltage values ​​corresponding to the first t2 time period to the third t2 time period are: 0V, 1V, 0V. This voltage value sequence is consistent with Figure 11 The voltage value sequence in (a) is the same, so the energy transmission signal generation module 511 correctly outputs the energy transmission signal sent by the primary end.

[0303] In some embodiments, it can be preset that if the digital identifiers determined in sequence by the secondary end are greater than a preset number and are all preset digital identifiers, there is no need to generate an energy transfer signal. At this time, it can be understood that the primary end has not received the energy transfer signal, that is, the primary end only transmits electrical energy to the secondary end, and there is no need to transmit the energy transfer signal.

[0304] In one example, assuming that the preset digital identifier is the first identifier, if the digital identifiers greater than the preset number sequentially determined by the secondary end are all first identifiers, there is no need to generate an energy transfer signal.

[0305] S1008. Power the secondary side through the target AC signal.

[0306] For example, Figure 5 As shown in (b), after the secondary side receives the target AC signal, the voltage and current in the target AC signal can be used to load R in the secondary side. s Provide power supply.

[0307] like Figure 5 As shown, Figure 5 (a) After the primary-side simulation inverter circuit outputs the initial AC signal, the primary-side coupling coil L p1 And the primary compensation capacitor C p2 Resonate at the fundamental frequency, perform harmonic attenuation on the initial AC signal, and obtain an AC signal; the primary side coupling coil L p1 and secondary coupling coil L s1 Through magnetic coupling, the AC signal is transmitted to the secondary side, and the secondary side coupling coil L s1 and the secondary compensation capacitor C s1 It also resonates at the fundamental frequency and further attenuates the harmonics of the AC signal to obtain a target AC signal. Therefore, the fundamental content in the target AC signal is high. Then, based on the target AC signal, the secondary side is powered, which can improve the efficiency of powering the secondary side.

[0308] Figure 12 Schematic diagram of the signal transmission method for power supply provided in this application Figure 7 ,like Figure 12 As shown, this embodiment combines Figure 4 Examples and Figure 10In this embodiment, based on a simulation circuit, a signal transmission method for power supply from the primary side to the secondary side is generally described. The method includes:

[0309] S1201: The primary side receives an energy transmission signal based on a preset time period; wherein the energy transmission signal is used to represent the power supply status of the primary side to the secondary side.

[0310] Exemplarily, the implementation of step S1201 is similar to that of step S401 . For details, please refer to the description of step S401 , which will not be repeated here.

[0311] S1202. If the primary side determines that the energy transmission signal meets the preset conditions, then for each digital identifier in the energy transmission signal, a modulation circuit corresponding to the digital identifier is determined as the target circuit; wherein the two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit.

[0312] Exemplarily, the implementation of step S1202 is similar to the implementation of step S402. For details, please refer to the description of step S402, which will not be repeated here.

[0313] S1203. The primary end converts the digital identifier corresponding to the target circuit into a modulation signal through the target circuit; wherein the modulation signal represents the digital identifier.

[0314] Exemplarily, the implementation of step S1203 is similar to that of step S403 . For details, please refer to the description of step S403 , which will not be repeated here.

[0315] S1204: The primary side controls the DC power supply to generate a DC signal according to the modulated signal, and converts the DC signal into an AC signal through an inverter circuit.

[0316] Exemplarily, the implementation of step 1204 is similar to the implementation of step S404. For details, please refer to the description of step S404, which will not be repeated here.

[0317] S1205: The primary side sends an AC signal to the secondary side.

[0318] Exemplarily, the implementation of step S1205 is similar to the implementation of step S405. For details, please refer to the description of step S405, which will not be repeated here.

[0319] S1206 : The secondary side attenuates the harmonics in the AC signal through a second harmonic attenuation circuit to obtain a target AC signal.

[0320] Exemplarily, the implementation of step S1206 is similar to the implementation of step S1002. For details, please refer to the description of step S1002, which will not be repeated here.

[0321] S1207 : The secondary side enhances the preset harmonics in the target AC power signal through the harmonic enhancement circuit to obtain an enhanced target AC power signal.

[0322] Exemplarily, the implementation of step S1207 is similar to the implementation of step S1003. For details, please refer to the description of step S1003, which will not be repeated here.

[0323] S1208 , the secondary side performs voltage amplification processing on the enhanced target AC power signal through a signal amplification circuit to obtain an amplified target AC power signal.

[0324] Exemplarily, the implementation of step S1208 is similar to the implementation of step S1004. For details, please refer to the description of step S1004, which will not be repeated here.

[0325] S1209: The secondary side determines current amplitude information of the preset harmonic according to the voltage in the amplified target AC power signal.

[0326] Exemplarily, the implementation of step S1209 is similar to the implementation of step S1005. For details, please refer to the description of step S1005, which will not be repeated here.

[0327] S1210: The secondary side determines a digital identifier according to the current amplitude information.

[0328] Exemplarily, the implementation of step S1210 is similar to the implementation of step S1006. For details, please refer to the description of step S1006, which will not be repeated here.

[0329] S1211. The secondary side determines an energy transmission signal according to the determined digital identifier.

[0330] Exemplarily, the implementation of step S1211 is similar to the implementation of step S1007. For details, please refer to the description of step S1007, which will not be repeated here.

[0331] S1212: The secondary side supplies power to the secondary side through the target AC power signal.

[0332] Exemplarily, the implementation of step S1212 is similar to the implementation of step S1008. For details, please refer to the description of step S1008, which will not be repeated here.

[0333] Figure 13 The following is a schematic diagram of the monitoring results of the load voltage during the simulation process provided by this application, as shown in FIG. Figure 13 As shown, the horizontal axis represents time, the unit is 10 -4 Seconds, vertical axis represents Figure 5 The load R s It can be seen that the voltage at t4×10 -4 After a few seconds, it stabilizes, so Figure 5 The load R s Efficient charging can be performed, and the charging process is not affected by the modulation circuit switching between different digital identifiers at the primary side.

[0334] Figure 14 Schematic diagram of the structure of the signal transmission device for power supply provided in this application Figure 1 ,like Figure 14 As shown, the device is applied to the primary side, where a DC power supply and two modulation circuits are deployed. The DC power supply is used to generate a DC signal. The device 140 includes:

[0335] The receiving module 1401 is configured to receive an energy transmission signal based on a preset time period, wherein the energy transmission signal is used to indicate the power supply from the primary end to the secondary end;

[0336] A determination module 1402 is configured to, if it is determined that the energy transmission signal satisfies a preset condition, determine, for each digital identifier in the energy transmission signal, a modulation circuit corresponding to the digital identifier as a target circuit; wherein the two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit;

[0337] The signal conversion module 1403 is used to convert the DC power signal of the DC power supply into an AC power signal through the target circuit;

[0338] The sending module 1404 is configured to send an AC signal to the secondary side.

[0339] In one possible implementation, a driving circuit is disposed in the primary end, and the driving circuit is used to amplify the signal;

[0340] In a possible implementation, the signal conversion module 1403 is specifically configured to:

[0341] Converting a digital identifier corresponding to the target circuit into a modulation signal through the target circuit; wherein the modulation signal represents the digital identifier;

[0342] The modulation signal is amplified in voltage and current by the driving circuit to obtain an amplified modulation signal;

[0343] According to the amplified modulation signal, the DC signal of the DC power supply is converted into an AC signal.

[0344] In a possible implementation, an inverter circuit is deployed in the primary side.

[0345] In a possible implementation, when the signal conversion module 1403 converts the DC power signal of the DC power supply into an AC power signal according to the amplified modulation signal, it is specifically configured to:

[0346] According to the amplified modulation signal, the DC power supply is controlled to generate a DC signal which passes through an inverter circuit to obtain an AC signal.

[0347] In a possible implementation, a first harmonic attenuation circuit is deployed in the primary end, and the first harmonic attenuation circuit includes a primary compensation capacitor and a primary coupling coil connected in series;

[0348] In one possible implementation, the signal conversion module 1403 controls the DC power supply to generate a DC signal and converts it into an AC signal through an inverter circuit according to the amplified modulation signal. Specifically, the signal conversion module 1403 is configured to:

[0349] According to the amplified modulation signal, the DC power supply is controlled to generate a DC signal which passes through an inverter circuit to obtain an initial AC signal; wherein the initial AC signal includes a fundamental wave and harmonics;

[0350] The harmonics in the initial AC signal are attenuated by the first harmonic attenuation circuit to obtain an AC signal.

[0351] In a possible implementation, when determining that the energy transmission signal satisfies a preset condition, the determination module 1402 is specifically configured to:

[0352] If the format of the energy transmission signal is a preset format and the energy transmission signal only contains the first identifier and / or the second identifier, it is determined that the energy transmission signal meets the preset condition.

[0353] The signal transmission device for power supply provided in this embodiment can execute the method provided in the above-mentioned method embodiment applied to the primary side. Its implementation principle and technical effects are similar and will not be described in detail in this embodiment.

[0354] Figure 15 Schematic diagram of the structure of the signal transmission device for power supply provided in this application Figure 2 ,like Figure 15 As shown, the device is applied to the secondary side, which is the electronic device to be powered. The secondary side is deployed with a harmonic enhancement circuit and a signal amplification circuit. The device 150 includes:

[0355] Receiving module 1501, configured to receive an AC signal transmitted from a primary side; wherein the AC signal refers to an AC signal generated by receiving an energy transmission signal from a primary side and converting a digital identifier corresponding to the modulation circuit in the energy transmission signal into a modulation signal through a modulation circuit;

[0356] The enhancement module 1502 is configured to enhance the preset harmonics in the AC signal through a harmonic enhancement circuit to obtain an enhanced AC signal;

[0357] an amplifying module 1503 for amplifying the voltage of the enhanced AC signal through a signal amplifying circuit to obtain an amplified AC signal;

[0358] The determination module 1504 is configured to determine the energy transmission signal according to the voltage in the amplified alternating current signal.

[0359] In a possible implementation, the determining module 1504 is specifically configured to:

[0360] Determining current amplitude information of a preset harmonic according to the voltage in the amplified AC signal;

[0361] Determine the digital identification according to the current amplitude information;

[0362] An energy transmission signal is determined according to the determined digital identifier.

[0363] In a possible implementation, a second harmonic attenuation circuit is deployed in the secondary side, and the second harmonic attenuation circuit includes a secondary side compensation capacitor and a secondary side coupling coil connected in series;

[0364] In a possible implementation, the device 150 is further configured to:

[0365] The harmonics in the AC signal are attenuated by the second harmonic attenuation circuit to obtain the target AC signal;

[0366] The harmonic enhancement circuit enhances the preset harmonics in the target AC power signal to obtain an enhanced target AC power signal;

[0367] The enhanced target AC signal is amplified by a signal amplification circuit to obtain an amplified target AC signal;

[0368] An energy transfer signal is determined according to the voltage of the amplified target AC signal.

[0369] In a possible implementation, when determining the current amplitude information of the preset harmonic according to the voltage in the amplified AC signal, the determination module 1504 is specifically configured to:

[0370] Based on a preset Fourier algorithm, the voltage in the amplified AC signal is converted from the time domain to the frequency domain to obtain the current amplitude information of the preset harmonics.

[0371] In a possible implementation, when determining the digital identifier based on the current amplitude information, the determination module 1504 is specifically configured to:

[0372] If the current amplitude information is greater than a preset amplitude threshold, determining the digital identifier as the first identifier;

[0373] If the current amplitude information is less than or equal to the preset amplitude threshold, the digital identifier is determined to be the second identifier.

[0374] In a possible implementation, a rectifier circuit is disposed in the secondary side.

[0375] In a possible implementation, the device 150 is further configured to:

[0376] The AC signal is converted into a DC power supply signal through a rectifier circuit; wherein the power supply signal is used to power the secondary side.

[0377] The signal transmission device for power supply provided in this embodiment can execute the method provided in the above-mentioned method embodiment applied to the secondary side. Its implementation principle and technical effects are similar and will not be described in detail in this embodiment.

[0378] Figure 16 This is a schematic diagram of the structure of the electronic device provided in this application. Figure 16 As shown, the electronic device 160 provided in this embodiment includes: at least one processor 1601 and a memory 1602. Optionally, the device 160 also includes a communication component 1603. The processor 1601, the memory 1602, and the communication component 1603 are connected via a bus 1604.

[0379] During the specific implementation process, at least one processor 1601 executes the computer-executable instructions stored in the memory 1602, so that the at least one processor 1601 performs the above method.

[0380] The specific implementation process of the processor 1601 can be found in the above method embodiment. Its implementation principle and technical effects are similar and will not be repeated here in this embodiment.

[0381] The electronic device 160 provided in this embodiment may be a primary end or a secondary end.

[0382] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASICs), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the present invention may be directly executed by a hardware processor or by a combination of hardware and software modules in the processor.

[0383] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk memory.

[0384] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be classified as address buses, data buses, and control buses. For ease of illustration, the buses in the drawings of this application are not limited to just one bus or just one type of bus.

[0385] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the above-mentioned method applied to the primary side; or, when executed by a processor, implements the above-mentioned method applied to the secondary side.

[0386] The present application also provides a signal transmission system for power supply, which includes a primary side and a secondary side; wherein the primary side is used to execute any of the above methods applied to the primary side, and the secondary side is used to execute any of the above methods applied to the secondary side.

[0387] The present application also provides a computer-readable storage medium, which stores computer-executable instructions. When a processor executes the computer-executable instructions, the above-mentioned method applied to the primary side is implemented; or, when the processor executes the computer-executable instructions, the above-mentioned method applied to the secondary side is implemented.

[0388] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile memory device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0389] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in a device as discrete components.

[0390] The division of units is merely a logical functional division; actual implementations may employ alternative divisions, such as combining or integrating multiple units or components into another system, or omitting or disabling certain features. Furthermore, any direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units, either through an interface, electrical, mechanical, or other means.

[0391] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0392] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0393] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0394] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0395] Finally, it should be noted that those skilled in the art will readily identify other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.

Claims

1. A signal transmission method for power supply, characterized in that: The method is applied to a primary side; a DC power supply and two modulation circuits are deployed in the primary side, and the DC power supply is used to generate a DC signal; the method includes: Based on a preset time period, receiving an energy transmission signal; wherein the energy transmission signal is used to represent the power supply status of the primary side to the secondary side; If it is determined that the energy transmission signal satisfies a preset condition, then for each digital identifier in the energy transmission signal, a modulation circuit corresponding to the digital identifier is determined as a target circuit; wherein the two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit, respectively; The DC power signal of the DC power supply is converted into an AC power signal through the target circuit, and the AC power signal is sent to the secondary side.

2. The method according to claim 1, characterized in that The primary side is provided with a driving circuit for amplifying a signal; and the target circuit converts the DC power supply's DC signal into an AC signal, including: Converting the digital identifier corresponding to the target circuit into a modulated signal through the target circuit; wherein the modulated signal represents the digital identifier; Amplifying the voltage and current of the modulation signal by the driving circuit to obtain an amplified modulation signal; The DC power signal of the DC power supply is converted into an AC power signal according to the amplified modulation signal.

3. The method according to claim 2, characterized in that An inverter circuit is disposed in the primary side; and according to the amplified modulation signal, the DC power signal of the DC power supply is converted into an AC power signal, including: According to the amplified modulation signal, the DC power supply is controlled to generate a DC signal which passes through the inverter circuit to obtain the AC signal.

4. The method according to claim 3, characterized in that A first harmonic attenuation circuit is disposed in the primary end, wherein the first harmonic attenuation circuit includes a primary compensation capacitor and a primary coupling coil connected in series; According to the amplified modulation signal, controlling the DC power supply to generate a DC signal to pass through the inverter circuit to obtain the AC signal includes: According to the amplified modulation signal, the DC power supply is controlled to generate a DC signal which passes through the inverter circuit to obtain an initial AC signal; wherein the initial AC signal includes a fundamental wave and harmonics; The first harmonic attenuation circuit attenuates the harmonics in the initial alternating current signal to obtain the alternating current signal.

5. The method according to claim 1, wherein Determining that the energy transmission signal meets a preset condition includes: If the format of the energy transmission signal is a preset format and the energy transmission signal only contains the first identifier and / or the second identifier, it is determined that the energy transmission signal meets the preset condition.

6. A signal transmission method for power supply, characterized in that: The method is applied to a secondary side, where the secondary side is an electronic device to be powered, and a harmonic enhancement circuit and a signal amplification circuit are deployed in the secondary side. The method includes: Receive an AC signal transmitted from the primary side; wherein the AC signal refers to an AC signal generated by receiving an energy transmission signal from the primary side and converting a digital identifier corresponding to the modulation circuit in the energy transmission signal into a modulation signal through a modulation circuit; The harmonic enhancement circuit enhances the preset harmonics in the AC signal to obtain an enhanced AC signal; amplifying the voltage of the enhanced alternating current signal through the signal amplifying circuit to obtain an amplified alternating current signal; The energy transfer signal is determined according to the voltage of the amplified alternating current signal.

7. The method according to claim 6, characterized in that Determining the energy transmission signal according to the voltage of the amplified alternating current signal includes: determining current amplitude information of the preset harmonic according to the voltage in the amplified alternating current signal; determining a digital identifier according to the current amplitude information; The energy transmission signal is determined according to the determined digital identifier.

8. The method according to claim 7, characterized in that A second harmonic attenuation circuit is disposed in the secondary side end, and the second harmonic attenuation circuit includes a secondary side compensation capacitor and a secondary side coupling coil connected in series; and further includes: Attenuating the harmonics in the AC signal through the second harmonic attenuation circuit to obtain a target AC signal; By means of the harmonic enhancement circuit, the preset harmonics in the target AC power signal are enhanced to obtain an enhanced target AC power signal; performing voltage amplification processing on the enhanced target AC signal through the signal amplification circuit to obtain an amplified target AC signal; The energy transfer signal is determined according to the voltage of the amplified target AC signal.

9. The method according to claim 7, characterized in that Determining current amplitude information of the preset harmonic according to the voltage in the amplified alternating current signal includes: Based on a preset Fourier algorithm, the voltage in the amplified alternating current signal is converted from the time domain to the frequency domain to obtain current amplitude information of the preset harmonic.

10. The method according to claim 7, characterized in that Determining a digital identifier according to the current amplitude information includes: If the current amplitude information is greater than a preset amplitude threshold, determining that the digital identifier is a first identifier; If the current amplitude information is less than or equal to a preset amplitude threshold, the digital identifier is determined to be a second identifier.

11. The method according to any one of claims 6 to 10, characterized in that The secondary side is provided with a rectifier circuit; and further comprising: The alternating current signal is converted into a direct current power supply signal by the rectifier circuit; wherein the power supply signal is used to supply power to the secondary side.

12. A signal transmission device for power supply, characterized in that: The device is applied to the primary side, wherein a DC power supply and two modulation circuits are deployed in the primary side, wherein the DC power supply is used to generate a DC signal; the device includes: A receiving module, configured to receive an energy transmission signal based on a preset time period; wherein the energy transmission signal is used to represent the power supply status of the primary side to the secondary side; a determination module configured to, if it is determined that the energy transmission signal satisfies a preset condition, determine, for each digital identifier in the energy transmission signal, a modulation circuit corresponding to the digital identifier as a target circuit; wherein the two modulation circuits are a bipolar modulation circuit and a unipolar frequency multiplication modulation circuit, respectively; a signal conversion module, configured to convert the DC signal of the DC power supply into an AC signal through the target circuit; A sending module is used to send the AC power signal to the secondary end.

13. A signal transmission device for power supply, characterized in that: The device is applied to a secondary side, which is an electronic device to be powered. A harmonic enhancement circuit and a signal amplification circuit are deployed in the secondary side. The device includes: A receiving module, configured to receive an AC signal transmitted from a primary end; wherein the AC signal is an AC signal generated by receiving an energy transmission signal from the primary end and converting a digital identifier corresponding to the modulation circuit in the energy transmission signal into a modulation signal through a modulation circuit; an enhancement module, configured to enhance the preset harmonics in the AC power signal through the harmonic enhancement circuit to obtain an enhanced AC power signal; an amplifying module, configured to amplify the voltage of the enhanced alternating current signal through the signal amplifying circuit to obtain an amplified alternating current signal; A determination module is used to determine the energy transmission signal according to the voltage in the amplified alternating current signal.

14. An electronic device, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor executes the method according to any one of claims 1 to 5; or, the processor executes the method according to any one of claims 6 to 11.

15. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method according to any one of claims 1 to 5; or, the computer-executable instructions, when executed by a processor, are used to implement the method according to any one of claims 6 to 11.

16. A computer program product, characterized in that The method comprises a computer program, which implements the method according to any one of claims 1 to 5 when the computer program is executed by a processor; or, which implements the method according to any one of claims 6 to 11 when the computer program is executed by a processor.

17. A signal transmission system for power supply, characterized in that: The system includes a primary side and a secondary side; The primary side is used to execute the method according to any one of claims 1 to 5, and the secondary side is used to execute the method according to any one of claims 6 to 11.

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