A wireless energy transfer insulator for parallel power supply of multiple loads and its design method

Abstract

The present invention provides a wireless energy transmission insulator for parallel power supply of multiple loads and a design method thereof, comprising: determining design parameters of an insulator in the wireless energy transmission insulator and design parameters of a wireless power supply coil based on a required insulation distance; determining the number of constant current and constant voltage power supply circuits added to the output end of a receiving coil of the wireless power supply coil and their capacitance and inductance based on load requirements; adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the receiving coil achieves constant voltage output; and realizing the design of the wireless energy transmission insulator based on the installation relationship of an inverter, an adjusted wireless power supply coil, a constant current and constant voltage power supply circuit, and a rectifier connected in sequence with the insulator. The present application adjusts the compensation capacitance of the receiving coil loop so that the receiving coil achieves constant voltage output, providing a basis for the constant current and constant voltage power supply circuit to constantly output multiple levels of voltage and current, thereby realizing power supply for multiple loads with different requirements at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless energy transmission insulators, and in particular to a wireless energy transmission insulator for parallel power supply of multiple loads and a design method thereof. Background Art

[0002] Various condition monitoring devices are deployed on overhead power line towers. Currently, these devices primarily rely on photovoltaic power generation, which is susceptible to weather conditions and lacks stability. Therefore, a new power supply method is needed to provide these devices with stable power. While significant energy can be obtained from the AC power transmitted by overhead lines through current mutual induction, this energy is at high voltage and cannot directly power the tower-side devices. Therefore, insulators are used to connect the line and the tower and provide potential isolation. Wireless power transfer technology based on magnetic resonance uses a high-frequency magnetic field as the transmission medium, achieving wireless power transmission through magnetic field coupling between coils. The space between the coils can be air or insulating material. Therefore, in recent years, research institutions have been investigating the integration of wireless power systems with insulators to create wireless power transfer insulators to power tower-side monitoring devices. Furthermore, to address the distance limitations of near-field coupling, research institutions have generally adopted multi-relay coil and domino coil structures to increase the transmission distance of wireless power transfer systems.

[0003] However, due to the presence of multiple monitoring devices on the tower side, their power supply voltages and equivalent load impedances are different. When the wireless energy transmission insulator simultaneously supplies power to multiple loads with different impedances, the total equivalent load impedance of the wireless energy transmission system changes, making it impossible to meet the constant voltage or constant current power supply requirements for multiple loads at the same time at the receiving end. Summary of the Invention

[0004] To overcome the above-mentioned deficiencies of the prior art, the present invention proposes a design method for a wireless energy transfer insulator for parallel power supply of multiple loads, comprising:

[0005] Determining design parameters of an insulator within the wireless energy transmission insulator based on the required insulation distance; and determining design parameters of a wireless power supply coil within the wireless energy transmission insulator based on the design parameters of the insulator;

[0006] Based on the load demand, determine the number of constant current and constant voltage power supply circuits added to the output end of the receiving coil of the wireless power supply coil, and determine the capacitance and inductance of the constant current and constant voltage power supply circuit;

[0007] Adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the adjusted receiving coil achieves a constant voltage output, thereby obtaining the adjusted wireless power supply coil;

[0008] The design of the wireless energy transmission insulator is realized based on the sequentially connected inverter, the adjusted wireless power supply coil, the constant current and constant voltage power supply circuit and the rectifier, and the installation relationship with the insulator.

[0009] Optionally, the wireless power supply system includes: the inverter, wireless power supply coil, constant current and constant voltage power supply circuit and rectifier inside the wireless energy transmission insulator, and external filter capacitor and load connected in sequence;

[0010] Adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the adjusted receiving coil achieves constant voltage output, including:

[0011] Using a block matrix algorithm, the impedance matrix of the wireless power supply system is divided into blocks to obtain an inductive reactance matrix between a receiving coil and a relay coil, and an impedance and inductive reactance matrix between relay coils, wherein the wireless power supply coil includes a transmitting coil, a relay coil, and a receiving coil connected in sequence;

[0012] Based on the inductive reactance matrix between the receiving coil and the relay coil, the impedance and inductive reactance matrix between the relay coils, the operating angular frequency of the wireless power supply system, and the internal resistance and self-inductance of the receiving coil, combined with the calculation formula of the receiving coil compensation capacitance value, the compensation capacitance value of the receiving coil is adjusted so that the output voltage of the receiving coil is always equal to its induced voltage, thereby achieving constant voltage output of the receiving coil.

[0013] Optionally, the calculation formula for the receiving coil compensation capacitance value is:

[0014]

[0015] Among them, C' n represents the compensation capacitance value of the receiving coil; j represents the result is an imaginary number; w represents the operating angular frequency of the wireless power supply system; B represents the inductive reactance matrix between the receiving coil and the relay coil; B T represents the transposed matrix of matrix B; X represents the impedance and inductive reactance matrix between relay coils; R n Indicates the internal resistance of the receiving coil; L n Represents the self-inductance of the receiving coil.

[0016] Optionally, after adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the adjusted receiving coil achieves constant voltage output and before obtaining the adjusted wireless power supply coil, the method further includes:

[0017] Based on the total equivalent impedance of the subsequent circuit of the receiving coil and the impedance matrix of the wireless power supply system, adjusting the compensation capacitance value of the transmitting coil so that the capacitive reactance and the inductive reactance of the transmitting coil cancel each other out;

[0018] The subsequent circuit of the receiving coil includes the constant current and constant voltage power supply circuit, the rectifier, the filter capacitor and the load which are connected in sequence.

[0019] Optionally, adjusting the compensation capacitance value of the transmitting coil based on the total equivalent impedance of the subsequent circuit of the receiving coil and the impedance matrix of the wireless power supply system so that the capacitive reactance and the inductive reactance of the transmitting coil cancel each other includes:

[0020] Using a block matrix algorithm to divide the impedance matrix of the wireless power supply system into blocks, the inductive reactance matrix between the transmitting coil and the relay coil, and the impedance and inductive reactance matrix between the relay coils are obtained;

[0021] Based on the inductive reactance matrix between the transmitting coil and the relay coil, the impedance and inductive reactance matrix between the relay coils, the inductive impedance generated on the transmitting coil by the relay coil and the receiving coil, the inductive impedance generated on the receiving coil by the transmitting coil and the relay coil, the total equivalent impedance of the subsequent circuit of the receiving coil, and the self-inductance of the transmitting coil, combined with a calculation formula for the compensation capacitance value of the transmitting coil, the compensation capacitance value of the transmitting coil is adjusted so that the capacitive reactance and the inductive reactance of the transmitting coil cancel each other out.

[0022] Optionally, the calculation formula of the transmitting coil compensation capacitance value is:

[0023]

[0024] Where C'1 represents the compensation capacitance value of the transmitting coil; Im is the symbol for the imaginary part; Z 12 Z represents the inductive impedance generated by the relay coil and the receiving coil on the transmitting coil; 21 Z represents the inductive impedance generated by the transmitting coil and the relay coil on the receiving coil; Leq represents the total equivalent impedance of the subsequent circuit of the receiving coil; A represents the inductive reactance matrix between the transmitting coil and the relay coil; A T represents the transposed matrix of matrix A; X represents the impedance and inductive reactance matrix between relay coils; w represents the operating angular frequency of the wireless power supply system; L1 represents the self-inductance of the transmitting coil.

[0025] Optionally, the total equivalent impedance of the subsequent circuit of the receiving coil is obtained according to the following steps:

[0026] Based on the inductance parameters of the constant current and constant voltage power supply circuit and the resistance of the load connected to the constant current and constant voltage power supply circuit, the total equivalent impedance generated by the constant current and constant voltage power supply circuit of the subsequent circuit of the receiving coil and the connected load is calculated.

[0027] Optionally, after adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the adjusted receiving coil achieves constant voltage output and the adjusted wireless power supply coil is obtained, the method further includes:

[0028] The input voltage of the wireless power supply system is adjusted so that the output voltage of the receiving coil reaches a preset output voltage.

[0029] Optionally, the constant current and constant voltage power supply circuit includes a T-type circuit and / or a double T-type circuit;

[0030] The determining, based on the load demand, the number of constant current and constant voltage power supply circuits added to the output end of the receiving coil of the wireless power supply coil includes:

[0031] Determining the number of constant current and constant voltage power supply circuits added to the output end of the receiving coil of the wireless power supply coil based on the number of loads in the load requirement;

[0032] Among them, for each load, if the load requires constant current power supply, a T-type circuit is added to the output end of the receiving coil of the wireless power supply coil; if the load requires constant voltage power supply, a double T-type circuit is added to the output end of the receiving coil.

[0033] Optionally, determining the capacitance and inductance of the constant-current and constant-voltage power supply circuit includes:

[0034] Using the input voltage of the wireless power supply system as the output voltage of the receiving coil;

[0035] For each T-type circuit, the inductance parameter of the T-type circuit is obtained based on the output voltage of the receiving coil, the required current of the load connected to the T-type circuit, and the operating angular frequency of the wireless power supply system, in combination with an inductance calculation formula; and / or for each dual-T-type circuit, the capacitance and inductance parameters of the dual-T-type circuit are obtained based on the output voltage of the receiving coil, the required voltage of the load connected to the dual-T-type circuit, and the operating angular frequency of the wireless power supply system, in combination with capacitance and inductance parameter calculation formulas.

[0036] Optionally, the design of the wireless energy transmission insulator is implemented based on the sequentially connected inverter, the adjusted wireless power supply coil, the constant current and constant voltage power supply circuit and the rectifier, and the installation relationship of the insulator, including:

[0037] The inverter, the adjusted wireless power supply coil, the constant current and constant voltage power supply circuit and the rectifier connected in sequence are nested inside the insulator to realize the design of the wireless energy transmission insulator.

[0038] Optionally, the wireless power supply coil includes a multi-relay wireless power supply coil.

[0039] Based on the same inventive concept, the present invention proposes a wireless energy transmission insulator for parallel power supply of multiple loads, comprising: an insulator and a wireless energy transmission module embedded in the insulator;

[0040] The wireless energy transmission module includes an inverter, a wireless power supply coil, a constant current and constant voltage power supply circuit and a rectifier connected in sequence;

[0041] The wireless power supply coil includes a transmitting coil, a relay coil and a receiving coil connected in sequence;

[0042] The parameters of the wireless power supply coil and the parameters of the constant current and constant voltage power supply circuit are determined based on the above-mentioned method for designing a wireless energy transmission insulator for parallel power supply of multiple loads.

[0043] In another aspect, the present application further provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0044] The memory is used to store one or more programs;

[0045] When the one or more programs are executed by the at least one processor, the above-mentioned method for designing a wireless energy transmission insulator for parallel power supply of multiple loads is implemented.

[0046] On the other hand, the present application also provides a computer-readable storage medium having an execution program stored thereon. When the execution program is executed, the method for designing a wireless energy transmission insulator for parallel power supply of multiple loads as described above is implemented.

[0047] Compared with the closest prior art, the present invention has the following beneficial effects:

[0048] The present invention proposes a design method for a wireless energy transmission insulator for parallel power supply of multiple loads, comprising: determining the design parameters of the insulator in the wireless energy transmission insulator based on the required insulation distance; and determining the design parameters of the wireless power supply coil in the wireless energy transmission insulator according to the design parameters of the insulator; determining the number of constant current and constant voltage power supply circuits added to the output end of the receiving coil of the wireless power supply coil and their capacitance and inductance based on the load demand; adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the adjusted receiving coil achieves constant voltage output to obtain the adjusted wireless power supply coil; realizing the design of the wireless energy transmission insulator based on the installation relationship of the inverter, the adjusted wireless power supply coil, the constant current and constant voltage power supply circuit and the rectifier connected in sequence with the insulator; the present application sets the insulator and the wireless power supply coil according to the insulation distance requirements. The design parameters of the wireless power supply coil are used to preliminarily establish the internal topological structure of the wireless energy transmission insulator; multiple constant current and constant voltage power supply circuits are added to the output end of the receiving coil of the wireless power supply coil according to the load requirements. The constant current and constant voltage power supply circuit can make the system constantly output multiple levels of voltage and current under the condition of constant voltage output of the receiving coil, meeting the needs of powering multiple different loads at the same time; therefore, the present application adjusts the compensation capacitor of the receiving coil loop to make the output voltage of the receiving coil always equal to its induced voltage, thereby realizing the constant voltage output of the receiving coil, providing a basis for the constant output of the constant current and constant voltage power supply circuit, and meeting the needs of constant voltage or constant current power supply to multiple loads at the same time; at the same time, by assembling the inverter, the adjusted wireless power supply coil, the constant current and constant voltage power supply circuit and the rectifier with the insulator connected in sequence, the insulation between the high-voltage side line and the low-voltage side equipment is achieved.

[0049] The present invention proposes a wireless energy transmission insulator for parallel power supply of multiple loads, comprising: an insulator and a wireless energy transmission module embedded in the insulator; the wireless energy transmission module comprises an inverter, a wireless power supply coil, a constant current and constant voltage power supply circuit, and a rectifier connected in sequence; the wireless power supply coil comprises a transmitting coil, a relay coil, and a receiving coil connected in sequence; the parameters of the wireless power supply coil and the parameters of the constant current and constant voltage power supply circuit are determined based on the above-mentioned design method for a wireless energy transmission insulator for parallel power supply of multiple loads; the wireless energy transmission insulator ensures the insulation strength between the high-voltage side line and the low-voltage side equipment by embedding the wireless energy transmission module in the insulator, and can power multiple monitoring devices on the tower side. In addition, the wireless energy transmission insulator obtained by the above-mentioned design method can simultaneously and constantly output multiple levels of voltage and current to meet the power supply requirements of different loads (monitoring devices). BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 Schematic diagram of the process of designing a wireless energy transfer insulator for parallel power supply of multiple loads provided by the present invention Figure 1 ;

[0051] Figure 2 Schematic diagram of the process of designing a wireless energy transfer insulator for parallel power supply of multiple loads provided by the present invention Figure 2 ;

[0052] Figure 3 A schematic structural diagram of a wireless energy transfer insulator for parallel power supply of multiple loads provided by the present invention;

[0053] Figure 4 A circuit topology diagram of the multi-relay wireless power supply system provided by the present invention;

[0054] Figure 5 A T-type circuit diagram provided by the present invention;

[0055] Figure 6 A double-T type circuit diagram provided by the present invention;

[0056] Figure 7 An equivalent two-port network model of the multi-relay wireless power supply system provided by the present invention;

[0057] Figure 8 An equivalent circuit diagram of the receiving coil provided by the present invention;

[0058] Figure 9 This is a structural diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0059] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0060] The present invention provides a wireless energy transmission insulator for parallel power supply of multiple loads and a design method thereof, which enables a multi-relay wireless power transmission module to simultaneously provide constant voltage / constant current power supply to multiple loads.

[0061] This solution is designed for a wireless power transmission insulator with multiple voltage outputs and multiple loads. The overall technical solution is as follows: the wireless power transmission insulator consists of an insulator and a multi-relay wireless power transmission module. First, the insulator is designed, and design parameters such as its length, number of sheds, and dimensions are determined based on the insulation distance. The multi-relay wireless power transmission module's parameters, such as the transmission distance, number of coils, and dimensions, are then determined based on the insulator's design parameters. Second, multiple T-type and double-T-type circuits are added to the output end of the receiving coil. The inductor and capacitor parameters in these T-type and double-T-type circuits are adjusted to enable the multi-relay wireless power transmission system to simultaneously provide constant voltage and constant current to different loads. Next, the compensation capacitor of the receiving coil loop is adjusted based on the total equivalent load impedance of the receiving coil's downstream circuit and the impedance matrix of the wireless power supply system to achieve a constant voltage output. Finally, the multi-relay wireless power transmission module is nested within the insulator to ensure insulation strength between the high-voltage side line and the low-voltage side equipment. This technical solution enables the wireless power transmission insulator to simultaneously and constantly output multiple voltage and current levels, meeting the power supply needs of different loads.

[0062] Example 1:

[0063] The present invention provides a design method for a wireless energy transfer insulator with parallel power supply for multiple loads, such as Figure 1 As shown, including:

[0064] S1. Determine design parameters of an insulator in a wireless energy transmission insulator based on a required insulation distance; and determine design parameters of a wireless power supply coil in the wireless energy transmission insulator based on the design parameters of the insulator;

[0065] S2. Based on the load demand, determine the number of constant current and constant voltage power supply circuits added to the output end of the receiving coil of the wireless power supply coil, and determine the capacitance and inductance of the constant current and constant voltage power supply circuit;

[0066] S3. Adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the adjusted receiving coil achieves a constant voltage output, thereby obtaining the adjusted wireless power supply coil;

[0067] S4. Based on the sequentially connected inverter, the adjusted wireless power supply coil, the constant current and constant voltage power supply circuit and the rectifier, and the installation relationship with the insulator, the design of the wireless energy transmission insulator is realized.

[0068] Combine Figure 1 and Figure 2 The design method of a wireless energy transmission insulator for parallel power supply of multiple loads provided by the present invention is specifically described.

[0069] Among them, wireless energy transfer insulators such as Figure 3As shown, the device includes an insulator and a wireless energy transmission module nested within the insulating sheds of the insulator. The module comprises an inverter, a wireless power supply coil, a constant current and constant voltage power supply circuit, and a rectifier, all connected in sequence. The inverter module converts the acquired direct current (DC) into alternating current (AC). The AC passes through the wireless power supply coil, generating an alternating magnetic field and transferring energy through the magnetic field. A constant current and constant voltage power supply circuit is incorporated into the post-receiving coil circuit of the wireless power supply coil. The rectifier module converts the AC output of the constant current and constant voltage power supply circuit into DC power for the load. The insulator ensures the insulation strength between the high-voltage side line and the low-voltage side equipment.

[0070] In step S1, based on the required insulation distance, the design parameters of the insulator inside the wireless power transmission insulator are determined. The design parameters of the insulator include the voltage level of the insulator, the number of sheds, the shed diameter, the core rod diameter and the shed thickness.

[0071] The design parameters of the wireless power supply coil in the wireless power transmission insulator are determined according to the design parameters of the insulator.

[0072] In order to extend the transmission distance while ensuring the efficiency of the wireless energy transmission system, the wireless power supply coil of the present invention is a multi-relay wireless power supply coil. The wireless power transmission distance is determined based on the insulation distance requirements of the insulators of the determined voltage level; the number of relay levels N of the multi-relay wireless power supply coil (i.e., wireless power transmission coil) is determined based on the number of sheds required for the insulators; since the multi-relay wireless power supply coils are arranged at equal intervals, the spacing between the internal coils of the multi-relay wireless power supply coil is determined based on the wireless power supply distance and the number of relay levels;

[0073] According to the requirements of the shed diameter, core rod diameter and shed thickness of the insulator, the outer diameter D2 and the inner diameter D1 of the multi-relay wireless power supply coil are determined. The number of coil turns is Nt and both are densely wound.

[0074] In step S2, based on the load demand, the number of constant current and constant voltage power supply circuits added to the output end of the receiving coil of the wireless power supply coil is determined, and the capacitance and inductance of the constant current and constant voltage power supply circuit are determined.

[0075] like Figure 4 As shown, it is a circuit topology diagram of a multi-relay wireless power supply system, which includes a circuit schematic diagram of a wireless energy transmission insulator, because the multi-relay wireless power supply system includes a wireless energy transmission insulator and multiple loads R connected to the wireless energy transmission insulator, and multiple filter capacitors C for connecting the wireless energy transmission insulator and the multiple loads. d The DC power output by the rectifier of the wireless energy insulator may have a small amount of ripples. These ripples can be filtered by the filter capacitor to achieve a better DC effect.

[0076] To elaborate, the multi-relay wireless power supply system (also known as the wireless power supply system) includes the wireless energy transmission insulator, filter capacitor and load connected in sequence; the wireless energy transmission insulator includes the insulator, and nested in the insulator and connected in sequence: inverter, wireless power supply coil, constant current and constant voltage power supply circuit and rectifier; the multi-relay wireless power supply coil includes a transmitting coil, a multi-relay coil and a receiving coil connected in sequence; wherein, the constant current and constant voltage power supply circuit is connected to the output end of the receiving coil, so the subsequent circuit of the receiving coil includes a constant current and constant voltage power supply circuit, a rectifier, a filter capacitor and a load connected in sequence, and the constant current and constant voltage power supply circuit in the present invention selects a T-type circuit and / or a double T-type circuit.

[0077] The multiple coils in the multi-relay wireless power supply coil are coaxially and parallelly placed at equal intervals. The first coil is the transmitting coil, and the input of the transmitting coil is connected to the output of the inverter. The magnetic field energy generated by the transmitting coil is transmitted to the last coil, the receiving coil, through the relay coil. The output of the receiving coil is connected to a T-type / double-T-type circuit, and the output of the T-type or double-T-type circuit is connected to the input end of the rectifier. The output of the rectifier is connected to the load after the ripple is filtered out by a filter capacitor to power the load.

[0078] Figure 4 In the system, the capacitors in the multi-relay power supply coils are tuned according to the system resonant frequency, so that each coil is in a resonant state. S1-S4 are the thyristors of the inverter, L1-L n is the self-inductance of the coil from the first coil to the nth coil, C1-C n is the compensation capacitance from the first coil to the nth coil at the system resonant frequency, R1-R n Indicates the internal resistance from the first coil to the nth coil; Z in Represents the input impedance of the entire system; i1-i n Indicates the coil loop current from the 1st coil to the nth coil; U dc Indicates the DC voltage input to the system, u1 indicates the use of the inverter to convert the DC voltage U dc The converted alternating current represents the input voltage at both ends of the transmitting coil; U rec Represents the output voltage of the receiving coil; V out3 (CV) represents the voltage value required by the constant voltage load 3, CV represents the constant voltage mode; V out2 (CV) represents the voltage value required by the constant voltage load 2; I out1 (CC) represents the current value required by the constant current load 1, CC represents the constant current mode, M kt (i.e. M 12 , M 1n , M 2i …M(n -1) n ) represents the mutual inductance between each coil, k, t, i represent the kth, tth, ith coil respectively, and n represents the number of coils; L T and C T Represent the inductance and capacitance of the T-type circuit respectively, C T21 Indicates the value of the first capacitor in the second T-type circuit in the double T-type circuit, C T22 Indicates the value of the second capacitor in the second T-type circuit in the double T-type circuit, L T21 Indicates the value of the inductance in the second T-type circuit in the double T-type circuit; C T31 Indicates the value of the first capacitor in the second T-type circuit in another double T-type circuit, C T32 Indicates the value of the second capacitor in the second T-type circuit in another double T-type circuit, L T31 Indicates the value of the inductance in the second T-type circuit in another double T-type circuit, ZLeq represents the equivalent load of the subsequent circuit of the receiving coil, C d is the filter capacitor and R is the load.

[0079] S21, the constant current and constant voltage power supply circuit includes a T-type circuit and / or a double T-type circuit; based on the load demand, determining the number of constant current and constant voltage power supply circuits added to the output end of the receiving coil of the wireless power supply coil, including:

[0080] For each load (a load requires a T-type or double T-type circuit), if the load requires constant current power supply, a T-type circuit is added to the output end of the receiving coil of the multi-relay wireless power supply coil; if the load requires constant voltage power supply, a double T-type circuit is added to the output end of the receiving coil;

[0081] The number of T-type circuits and double-T-type circuits added to the output end of the receiving coil is determined in combination with multiple load requirements.

[0082] S22. Determine the capacitance and inductance of the constant current and constant voltage power supply circuit based on the load demand. By setting the output voltage of the receiving coil, and using a T-type circuit to achieve constant current output, and using a double T-type circuit to achieve constant voltage output, and then combining the output voltage of the receiving coil and the constant voltage and constant current output value to determine the inductance and capacitance parameters of the T-type circuit and the double T-type circuit, specifically:

[0083] S221. Use the input voltage of the multi-relay wireless power supply system as the output voltage of the receiving coil.

[0084] Typically, the voltage gain of a multi-relay wireless power transmission module (which includes an inverter, multi-relay wireless power transmission coil, constant current and constant voltage power supply circuit, and rectifier) ​​is 1. This means that the output voltage of the receiving coil is equal to the input voltage of the multi-relay wireless power transmission system. Therefore, to calculate the inductor and capacitor parameters of T-type and double-T-type circuits, first set the output voltage of the receiving coil to be equal to the input voltage of the system.

[0085] S222. For each T-type circuit, based on the output voltage of the receiving coil, the required current of the load connected to the T-type circuit, and the operating angular frequency of the multi-relay wireless power supply system, the inductance parameter of the T-type circuit is obtained in combination with an inductance calculation formula.

[0086] In order to meet the system's constant current output requirements, a T-type circuit is added to the output end of the receiving coil, such as Figure 5 The figure shows the topology of an LCL (LLC) T-type circuit added to the output end of the receiving coil. The T-type circuit is a well-known structure and will not be explained here. Based on the output voltage of the receiving coil, the required current of the load connected to the T-type circuit, and the angular frequency of the multi-relay wireless power supply system, the inductance parameters of the T-type circuit are obtained by combining the inductance calculation formula:

[0087]

[0088] in, Represents the output voltage of the receiving coil. This representation is because it is the vector form of the output voltage. Represents the output current of the T-type circuit. This representation is because it is the vector form of the output current. It is also the current value required by load 1; L T11 represents the value of the first inductor in the T-type circuit; w represents the angular frequency at which the multi-relay wireless power supply system operates; j represents that the result is an imaginary number.

[0089] Since the output voltage of the receiving coil is a constant, the T-type circuit has an inductance parameter L T11 After it is determined, the output current is independent of the load and always remains constant. When the output current needs to be adjusted, the inductance parameter L in the T-type circuit is changed. T11 To ensure the constant current output of the T-type circuit, the following expression should also be satisfied:

[0090]

[0091] Among them, L T12 Indicates the value of the second inductor in the T-type circuit; C T11 Represents the value of the capacitor in the T-type circuit. According to the characteristics of the T-type circuit, when the capacitance and inductance values ​​in the circuit meet this expression, a constant current output can be achieved.

[0092] S223. For each dual-T circuit, based on the output voltage of the receiving coil, the required voltage of the load connected to the dual-T circuit, and the operating angular frequency of the multi-relay wireless power supply system, the capacitance and inductance parameters of the dual-T circuit are calculated using capacitance and inductance parameter calculation formulas.

[0093] For the system constant voltage output condition, add a double T-type circuit at the output end of the receiving coil, such as Figure 6 As shown, the double T-type circuit is composed of an LLC (LCL) type T-type circuit and an LCC type T-type circuit in series, that is, the double T-type circuit of this embodiment is composed of an LCC type T-type circuit connected in series after the previous LCL type T-type circuit. The inductor L in the T-type and double T-type circuits of this embodiment is T11 According to the circuit structure, combined with the capacitance and inductance parameter calculation formula, the capacitance and inductance parameters of the double T-type circuit are obtained:

[0094]

[0095] Among them, C T21 Indicates the value of the first capacitor in the second T-type circuit in a double T-type circuit; L T11 Indicates the value of the first inductor in the first T-type circuit in the double T-type circuit; V out2 It represents the output voltage of the double-T circuit, that is, the voltage value required by the constant voltage load 2. is a constant value, so the double T-type circuit has a parameter L T11 and C T21 After it is determined, the output voltage is independent of the load and always remains constant. When the output voltage needs to be adjusted, change L T11 and C T21 To ensure the constant voltage output of the double T-type circuit, the following expression should be satisfied:

[0096]

[0097] Among them, C T21 Indicates the value of the first capacitor in the second T-type circuit in the double T-type circuit; C T11 Indicates the value of the capacitor in the first T-type circuit in the double T-type circuit; C T22 Indicates the value of the second capacitor in the second T-type circuit in the double T-type circuit; L T21 represents the value of the inductor in the second T-type circuit in the double T-type circuit, w represents the operating angular frequency of the multi-relay wireless power supply system; j indicates that the result is an imaginary number.

[0098] Based on this, multiple T-type and double-T-type circuits are added to the output end of the receiving coil. When the output voltage of the receiving coil output end is constant, by adjusting the inductance and capacitance parameters of the circuit, multiple levels of voltage and current can be output constantly, and multiple loads can be powered simultaneously.

[0099] In step S3, the compensation capacitance value of the receiving coil is adjusted based on the impedance matrix of the wireless power supply system, so that the adjusted receiving coil achieves constant voltage output, thereby obtaining the adjusted wireless power supply coil.

[0100] S31. A two-port network model is used to analyze the input / output characteristics of the multi-relay wireless power supply system. First, it is necessary to perform circuit equivalence on the relay coil loop of the multi-relay WPT system (multi-relay wireless power supply system).

[0101] Using the idea of ​​block matrix, the impedance matrix of the multi-relay wireless power supply system is divided into blocks, and the expressions of the parameter matrices A, B, and X after block division are obtained as follows:

[0102]

[0103] Wherein, A represents the inductive reactance matrix between the transmitting coil and the relay coil (i.e., multiple relay coils), specifically, the matrix composed of the inductive reactances between the first-stage magnetic induction coil (i.e., transmitting coil) and the other n-2-stage magnetic induction coils (i.e., relay coils), excluding the last-stage magnetic induction coil (i.e., receiving coil); B represents the inductive reactance matrix between the receiving coil and the relay coil, specifically, the matrix composed of the inductive reactances between the n-th-stage magnetic induction coil and the other n-2-stage magnetic induction coils, excluding the first-stage magnetic induction coil; X represents the impedance and inductive reactance matrix between the relay coils, specifically, the matrix composed of the impedance and inductive reactance of the other n-2-stage magnetic induction coils, excluding the first-stage and n-stage magnetic induction coils; Z2…Z (n-1) represents the self-impedance of the coil; w represents the operating angular frequency of the multi-relay wireless power supply system; j represents that the result is an imaginary number; M 12 …M (n-1)n Indicates the mutual inductance between coils, n indicates the number of coils, and M kt To unify the expression, the expression of the mutual inductance between the kth coil and the tth coil is:

[0104]

[0105] Among them, M kt represents the mutual inductance between the kth coil and the tth coil; Pd represents the distance between the center axes of the kth coil and the tth coil, that is, the axis spacing. In this design, because the coils are coaxially placed, Pd is 0; Nt represents the number of coil turns; J1 and J0 are Bessel functions; r grepresents the radius of the g-th turn of wire in the k-th coil, r h represents the radius of the h-th turn of wire in the t-th coil; e represents a natural constant; v kt represents the distance between the kth coil and the tth coil in the vertical direction; u0 represents the vacuum permeability, β represents the parameter related to the attenuation rate, and dβ is the integral variable, which represents the integral of the parameter β.

[0106] The expression for the wire radius is:

[0107]

[0108] Where D1 represents the inner diameter of the multi-relay wireless power supply coil; D2 represents the outer diameter of the multi-relay wireless power supply coil; r g represents the radius of the g-th turn of wire in the k-th coil, r h represents the radius of the hth turn of wire in the tth coil; Nt represents the number of turns in the coil.

[0109] v kt The calculation expression is:

[0110]

[0111] Among them, v kt represents the vertical distance between the kth coil and the tth coil; N represents the number of relay stages of the wireless power supply coil; Ls represents the wireless power supply distance.

[0112] Based on this, the specific value of each parameter matrix is ​​obtained.

[0113] According to Kirchhoff’s voltage law and the characteristics of the two-port network, the circuit model of the multi-relay wireless power supply system is expressed as:

[0114]

[0115] in, Indicates the output voltage of the inverter, which is also the input voltage of the system; Indicates the current in the transmitting coil loop; Represents the current of the receiving coil loop; Z 11 Represents the impedance parameter of the transmitting coil loop; Z 12 Z represents the inductive impedance generated by the transmitting coil and the relay coil on the receiving coil; 21 Z represents the inductive impedance generated by the transmitting coil and the relay coil on the receiving coil; 22 Represents the receiving coil's own impedance; Z 11 , Z 12 , Z 21 , Z 22 are all impedance parameters, and their expressions are:

[0116]

[0117] Where Z1 represents the self-impedance of the first coil, that is, the self-impedance of the transmitting coil; Z n represents the self-impedance of the nth coil, that is, the self-impedance of the receiving coil; A represents the inductive reactance matrix between the transmitting coil and the relay coil; A T represents the transposed matrix of matrix A; X represents the impedance and inductive reactance matrix between the relay coils; B represents the inductive reactance matrix between the receiving coil and the relay coil; B T represents the transposed matrix of matrix B; w represents the operating angular frequency of the multi-relay wireless power supply system; j represents that the result is an imaginary number; M 1n represents the mutual inductance between the transmitting coil and the receiving coil; Z 220 Represents the impedance parameter of the receiving coil loop; Z Leq It represents the total equivalent impedance of the receiving coil's subsequent loop.

[0118] By expressing the multi-relay wireless power supply system as a circuit model containing only input and output loops, an equivalent two-port network model can be obtained, such as Figure 7 As shown, Indicates the output voltage of the inverter; Indicates the current in the transmitting coil loop; Represents the current of the receiving coil loop; Z 11 Represents the impedance parameter of the transmitting coil loop; Z 12 I n represents the induced voltage generated on the transmitting coil, Z 21 I1 represents the induced voltage generated on the receiving coil loop; Z 220 Represents the impedance parameter of the receiving coil loop; Z Leq Represents the total equivalent impedance of the receiving coil's subsequent circuit; Represents the output voltage of the receiving coil, Z in Represents the input impedance of the entire system.

[0119] According to the equivalent two-port network model, the equivalent circuit of the receiving coil loop is obtained, as shown in Figure 8 As shown, Represents the induced voltage of the receiving coil loop, which can be regarded as a voltage source. The value of the induced voltage is equal to Z 21 I1, so the impedance of the receiving coil loop can be regarded as only Z 220 And the total equivalent impedance Z of the subsequent circuit Leq According to the equivalent circuit of the receiving coil loop, it can be intuitively analyzed that when the compensation capacitor of the receiving coil is adjusted so that the impedance Z of the receiving coil loop 220When it is 0, the output voltage of the receiving coil is always equal to its induced voltage, so that the receiving coil achieves constant voltage output.

[0120] The total equivalent impedance of the receiving coil rear-stage circuit is obtained according to the following steps:

[0121] Based on the inductance parameters of the T-type circuit and the resistance of the load connected to the T-type circuit, the total impedance generated by the T-type circuit and the connected load in the subsequent circuit of the receiving coil is calculated. Assuming that p T-type circuits are connected to the subsequent circuit of the receiving coil for constant current output, the total impedance generated by the T-type circuit and the connected load is:

[0122]

[0123] Among them, Z Leq-T represents the total impedance generated by the T-type circuit and the connected load; w represents the operating angular frequency of the multi-relay wireless power supply system; R α Indicates the resistance of the load connected to the αth T-type circuit; L Tα It represents the inductance value of the αth T-type circuit. The capacitance value of the circuit can be calculated from the inductance value in the circuit.

[0124] Based on the capacitance and inductance parameters of the dual-T circuit and the resistance of the load connected to the dual-T circuit, the total impedance generated by the dual-T circuit and the connected load in the downstream circuit of the receiving coil is calculated. Assuming that q dual-T circuits are connected to the downstream circuit of the receiving coil for constant voltage output, the total impedance generated by the dual-T circuit and the connected load is:

[0125]

[0126] Among them, Z Leq-2T Represents the total impedance generated by the double-T circuit and the connected load; R m Indicates the resistance of the load connected to the mth double-T circuit; L Tm1 C represents the inductance value of the first T-type circuit in the m-th double T-type circuit. The capacitance value of the T-type circuit can be calculated from the inductance value of the T-type circuit. Tm2 represents the capacitance value of the second T-type circuit in the m-th double T-type circuit. The inductance value in the T-type circuit can be calculated from the capacitance value of the T-type circuit. The specific calculation method is as obtained in step S22.

[0127] The total impedance generated by the T-type circuit and the connected load, as well as the total impedance generated by the double-T-type circuit and the connected load, is used to obtain the total equivalent impedance of the receiving coil's subsequent circuit. The total equivalent impedance is calculated as follows:

[0128]

[0129] Among them, Z Leq Represents the total equivalent impedance of the receiving coil's subsequent circuit; Z Leq-T Represents the total impedance generated by the T-type circuit and the connected load; Z Leq-2T It represents the total impedance generated by the twin-T circuit and the connected load.

[0130] S32. To power multiple loads simultaneously, multiple T-type and double-T-type circuits are added to the output end of the receiving coil. When using them for constant voltage and constant current output, the output voltage of the receiving coil must be kept constant. In the derivation process of step S31, the impedance of the receiving coil loop includes the total equivalent impedance Z of the subsequent circuit. Leq and the inductive impedance Z generated by the system 220 (i.e. the impedance of the receiving coil loop), these two impedances are divided, when Z 220 When it is 0, the last coil loop only has the impedance generated by the load, that is, the voltage across the load is always equal to the induced voltage of the receiving coil. Therefore, this solution adopts the method of adjusting the compensation capacitor value of the receiving coil loop to make the impedance Z of the receiving coil loop 220 When Z is 0, the output voltage of the receiving coil is always equal to its induced voltage. 220 When it is 0, the calculation formula of the compensation capacitance value of the receiving coil is:

[0131]

[0132] Among them, C' n represents the compensation capacitance value of the receiving coil; j represents the result is an imaginary number; w represents the operating angular frequency of the multi-relay wireless power supply system; B represents the inductive reactance matrix between the receiving coil and the relay coil; B T represents the transposed matrix of matrix B; X represents the impedance and inductive reactance matrix between relay coils; R n Indicates the internal resistance of the receiving coil; L n Represents the self-inductance of the receiving coil.

[0133] When the impedance parameter Z of the receiving coil loop 220 When is 0, the induced voltage on the receiving coil can be obtained according to the two-port network model:

[0134]

[0135] in, Indicates the induced voltage of the receiving coil loop; Indicates the output voltage of the inverter; Z 11 Represents the impedance parameter of the transmitting coil loop; Z Leq Represents the total equivalent impedance of the receiving coil's subsequent circuit; Z 12Z represents the inductive impedance generated by the transmitting coil and the relay coil on the receiving coil; 21 represents the inductive impedance generated by the transmitting coil and the relay coil on the receiving coil.

[0136] In addition to the aforementioned problem that the receiving end of the existing wireless energy transmission insulator cannot provide constant voltage or constant current power supply to multiple loads at the same time, when using traditional wireless energy transmission insulators to power multiple loads, the multiple load output circuits will generate additional reactance in the receiving coil loop and reflect it to the transmitting coil loop, thereby causing the reactance in the transmitting coil loop to change, causing the impedance of the system input end to be capacitive or inductive, and the input voltage and current phase difference to change, which increases the switching loss of the inverter at the transmitting end and reduces the system efficiency. When the phase difference is large, it may even seriously affect the output power of the system.

[0137] Therefore, while realizing constant voltage and constant current power supply to the load, the present invention also adjusts the compensation capacitance value of the transmitting coil so that the capacitive reactance and inductive reactance of the transmitting coil cancel each other out, thereby realizing zero phase angle input of the system and avoiding the problem of reduced energy transmission efficiency and power caused by the access of wireless energy transmission insulators with different supply voltages and different impedance loads.

[0138] That is, after adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the multi-relay wireless power supply system, it also includes S33: adjusting the compensation capacitance value of the transmitting coil based on the total equivalent impedance of the subsequent circuit of the receiving coil and the impedance matrix of the wireless power supply system, so that the capacitive reactance and inductive reactance of the transmitting coil cancel each other out.

[0139] Specifically, when the impedance parameter Z of the receiving coil loop 220 When is 0, the input current of the system can be obtained according to the two-port network model, and the expression is:

[0140]

[0141] in, It represents the input current of the wireless power supply system, that is, the current of the transmitting coil loop. When the imaginary part of the input current of the wireless power supply system is 0, the system achieves zero phase angle input.

[0142] Therefore, when the imaginary part of the input current of the wireless power supply system is 0, the calculation formula of the transmitting coil compensation capacitance value is:

[0143]

[0144] Where C'1 represents the compensation capacitance value of the transmitting coil; Im is the symbol for the imaginary part; Z 12 Z represents the inductive impedance generated by the relay coil and the receiving coil on the transmitting coil;21 Z represents the inductive impedance generated by the transmitting coil and the relay coil on the receiving coil; Leq represents the total equivalent impedance of the receiving coil's subsequent circuit; A represents the inductive reactance matrix between the transmitting coil and the relay coil; A T represents the transposed matrix of matrix A; X represents the impedance and inductive reactance matrix between relay coils; w represents the operating angular frequency of the multi-relay wireless power supply system; L1 represents the self-inductance of the transmitting coil.

[0145] Adjusting the compensation capacitance value of the transmitting coil enables the system to achieve zero phase angle input, avoiding the problem of reduced energy transfer efficiency and power caused by the access of wireless energy transfer insulators due to different power supply voltages and different load impedances.

[0146] S34. Adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the adjusted receiving coil achieves constant voltage output, and adjusting the compensation capacitance value of the transmitting coil so that the capacitive reactance and inductive reactance of the transmitting coil cancel each other out before obtaining the adjusted wireless power supply coil, further comprising: adjusting the input voltage of the multi-relay wireless power supply system so that the output voltage of the receiving coil reaches a preset output voltage.

[0147] That is, after determining the compensation capacitance values ​​of the receiving coil and the transmitting coil, the output voltage of the receiving coil is calculated from the input voltage of the system, and the output voltage of the receiving coil is adjusted to reach the set value by adjusting the input voltage of the system. Specifically, when adjusting the compensation capacitance C1 of the transmitting coil and the compensation capacitance C n After that, the gain between the input voltage of the wireless power supply system and the output voltage of the receiving coil may no longer be 1, that is, the input voltage U1 of the system may cause the output voltage of the receiving coil to fail to reach the previously set value U rec Therefore, the system input voltage U1 needs to be adjusted so that the output voltage of the receiving coil meets the set value.

[0148] S4. Nest the inverter, the adjusted wireless power supply coil, the constant current and constant voltage power supply circuit and the rectifier connected in sequence inside the insulator to realize the design of the wireless energy transmission insulator.

[0149] Since the insulator shed and the multi-relay wireless power supply coil are both circular, the multi-relay wireless power supply coil with determined design parameters is nested inside the insulator shed in sequence, and the inverter and rectifier are placed in the insulating boxes at both ends of the insulator to form a multi-output wireless energy transmission insulator, ensuring the insulation strength between the high-voltage side line and the low-voltage side equipment.

[0150] Example 2

[0151] Based on the same inventive concept, the present invention also provides a wireless energy transfer insulator for parallel power supply of multiple loads, such as Figure 3 As shown, it includes: an insulator and a wireless energy transmission module embedded in the insulator;

[0152] The insulator includes Figure 3 The insulating shed and the core rod inside the shed.

[0153] The wireless energy transmission module includes an inverter, a wireless power supply coil, a constant current and constant voltage power supply circuit and a rectifier connected in sequence;

[0154] The wireless power supply coil includes a transmitting coil, a relay coil and a receiving coil connected in sequence;

[0155] The parameters of the wireless power supply coil and the parameters of the constant current and constant voltage power supply circuit are determined based on the above-mentioned method for designing a wireless energy transmission insulator for parallel power supply of multiple loads.

[0156] Example 3

[0157] like Figure 9 As shown, the present invention also provides an electronic device, which may be a computer, a single-chip microcomputer, a smart mobile device, or the like. The electronic device in this embodiment may include a processor, a memory, a transceiver component, and the like. The memory, processor, and transceiver component are connected via a bus; the memory may be used to store an execution program, which may include instructions; and the processor may be used to execute the instructions stored in the memory. The memory may also be used to store data, which may be accessed and / or modified during the execution of the instructions.

[0158] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in a storage medium to implement the corresponding method flow or corresponding function, so as to implement the steps of a wireless energy transmission insulator design method for parallel power supply of multiple loads in the above embodiment.

[0159] Example 4

[0160] Based on the same inventive concept, the present invention also provides a storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in the electronic device for storing programs and data. It can be understood that the storage medium here can include both the built-in storage medium in the electronic device and the extended storage medium supported by the electronic device. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space. These instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one disk storage. The processor loads and executes one or more instructions stored in the storage medium, which can implement the steps of the wireless energy transmission insulator design method for parallel power supply of multiple loads in the above embodiment.

[0161] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0162] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0163] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0164] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0165] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit its scope of protection. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art may still make various changes, modifications or equivalent substitutions to the specific implementation methods of the application, but these changes, modifications or equivalent substitutions are all within the scope of protection of the pending claims.

Claims

1. A design method for a wireless energy transfer insulator for parallel power supply of multiple loads, characterized in that: include: Determine the design parameters of the inner insulator of the wireless energy transfer insulator based on the required insulation distance; and determining the design parameters of the wireless power supply coil in the wireless energy transmission insulator according to the design parameters of the insulator; Based on the load demand, determine the number of constant current and constant voltage power supply circuits added to the output end of the receiving coil of the wireless power supply coil, and determine the capacitance and inductance of the constant current and constant voltage power supply circuit; Adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the adjusted receiving coil achieves constant voltage output, thereby obtaining the adjusted wireless power supply coil, including: Using a block matrix algorithm, the impedance matrix of the wireless power supply system is divided into blocks to obtain an inductive reactance matrix between a receiving coil and a relay coil, and an impedance and inductive reactance matrix between relay coils, wherein the wireless power supply coil includes a transmitting coil, a relay coil, and a receiving coil connected in sequence; Based on the inductive reactance matrix between the receiving coil and the relay coil, the impedance and inductive reactance matrix between the relay coils, the operating angular frequency of the wireless power supply system, and the internal resistance and self-inductance of the receiving coil, combined with the calculation formula of the receiving coil compensation capacitance value, the compensation capacitance value of the receiving coil is adjusted so that the output voltage of the receiving coil is always equal to its induced voltage, thereby achieving a constant voltage output of the receiving coil, and obtaining the adjusted wireless power supply coil; the calculation formula of the receiving coil compensation capacitance value is: Among them, C n ′ represents the compensation capacitance value of the receiving coil; j represents the result is an imaginary number; w represents the operating angular frequency of the wireless power supply system; B represents the inductive reactance matrix between the receiving coil and the relay coil; B T represents the transposed matrix of matrix B; X represents the impedance and inductive reactance matrix between relay coils; R n Indicates the internal resistance of the receiving coil; L n represents the self-inductance of the receiving coil; The wireless power supply system includes: an inverter, a wireless power supply coil, a constant current and constant voltage power supply circuit and a rectifier inside the wireless energy transmission insulator, and an external filter capacitor and a load connected in sequence; The design of the wireless energy transmission insulator is realized based on the sequentially connected inverter, the adjusted wireless power supply coil, the constant current and constant voltage power supply circuit and the rectifier, and the installation relationship with the insulator.

2. The method according to claim 1, wherein After adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the adjusted receiving coil achieves constant voltage output and before obtaining the adjusted wireless power supply coil, the method further includes: Based on the total equivalent impedance of the subsequent circuit of the receiving coil and the impedance matrix of the wireless power supply system, adjusting the compensation capacitance value of the transmitting coil so that the capacitive reactance and the inductive reactance of the transmitting coil cancel each other out; The subsequent circuit of the receiving coil includes the constant current and constant voltage power supply circuit, the rectifier, the filter capacitor and the load which are connected in sequence.

3. The method according to claim 2, wherein The adjusting the compensation capacitance value of the transmitting coil based on the total equivalent impedance of the subsequent circuit of the receiving coil and the impedance matrix of the wireless power supply system so that the capacitive reactance and the inductive reactance of the transmitting coil cancel each other includes: Using a block matrix algorithm to divide the impedance matrix of the wireless power supply system into blocks, the inductive reactance matrix between the transmitting coil and the relay coil, and the impedance and inductive reactance matrix between the relay coils are obtained; Based on the inductive reactance matrix between the transmitting coil and the relay coil, the impedance and inductive reactance matrix between the relay coils, the inductive impedance generated on the transmitting coil by the relay coil and the receiving coil, the inductive impedance generated on the receiving coil by the transmitting coil and the relay coil, the total equivalent impedance of the subsequent circuit of the receiving coil, and the self-inductance of the transmitting coil, combined with a calculation formula for the compensation capacitance value of the transmitting coil, the compensation capacitance value of the transmitting coil is adjusted so that the capacitive reactance and the inductive reactance of the transmitting coil cancel each other out.

4. The method according to claim 3, wherein The calculation formula of the transmitting coil compensation capacitance value is: Where C′1 represents the compensation capacitance value of the transmitting coil; Im is the symbol for the imaginary part; Z 12 Z represents the inductive impedance generated by the relay coil and the receiving coil on the transmitting coil; 21 Z represents the inductive impedance generated by the transmitting coil and the relay coil on the receiving coil; Leq represents the total equivalent impedance of the subsequent circuit of the receiving coil; A represents the inductive reactance matrix between the transmitting coil and the relay coil; A T represents the transposed matrix of matrix A; X represents the impedance and inductive reactance matrix between the relay coils; w represents the operating angular frequency of the wireless power supply system; L1 represents the self-inductance of the transmitting coil.

5. The method according to claim 2, wherein The total equivalent impedance of the subsequent circuit of the receiving coil is obtained by the following steps: Based on the inductance parameters of the constant current and constant voltage power supply circuit and the resistance of the load connected to the constant current and constant voltage power supply circuit, the total equivalent impedance generated by the constant current and constant voltage power supply circuit of the subsequent circuit of the receiving coil and the connected load is calculated.

6. The method according to claim 1, wherein After adjusting the compensation capacitance value of the receiving coil based on the impedance matrix of the wireless power supply system so that the adjusted receiving coil achieves constant voltage output and the adjusted wireless power supply coil is obtained, the method further includes: The input voltage of the wireless power supply system is adjusted so that the output voltage of the receiving coil reaches a preset output voltage.

7. The method according to claim 1, wherein The constant current and constant voltage power supply circuit includes a T-type circuit and / or a double T-type circuit; The determining, based on the load demand, the number of constant current and constant voltage power supply circuits added to the output end of the receiving coil of the wireless power supply coil includes: Determining the number of constant current and constant voltage power supply circuits added to the output end of the receiving coil of the wireless power supply coil based on the number of loads in the load requirement; Among them, for each load, if the load requires constant current power supply, a T-type circuit is added to the output end of the receiving coil of the wireless power supply coil; if the load requires constant voltage power supply, a double T-type circuit is added to the output end of the receiving coil.

8. The method according to claim 7, wherein Determining the capacitance and inductance of the constant current and constant voltage power supply circuit includes: Using the input voltage of the wireless power supply system as the output voltage of the receiving coil; For each T-type circuit, the inductance parameter of the T-type circuit is obtained based on the output voltage of the receiving coil, the required current of the load connected to the T-type circuit, and the operating angular frequency of the wireless power supply system, in combination with an inductance calculation formula; and / or for each dual-T-type circuit, the capacitance and inductance parameters of the dual-T-type circuit are obtained based on the output voltage of the receiving coil, the required voltage of the load connected to the dual-T-type circuit, and the operating angular frequency of the wireless power supply system, in combination with capacitance and inductance parameter calculation formulas.

9. The method according to claim 1, wherein The design of the wireless energy transmission insulator is realized based on the sequentially connected inverter, the adjusted wireless power supply coil, the constant current and constant voltage power supply circuit and the rectifier, and the installation relationship of the insulator, including: The inverter, the adjusted wireless power supply coil, the constant current and constant voltage power supply circuit and the rectifier connected in sequence are nested inside the insulator to realize the design of the wireless energy transmission insulator.

10. The method according to claim 1, wherein The wireless power supply coil includes a multi-relay wireless power supply coil.

11. A wireless energy transmission insulator for parallel power supply of multiple loads, characterized in that: include: An insulator and a wireless energy transmission module embedded in the insulator; The wireless energy transmission module includes an inverter, a wireless power supply coil, a constant current and constant voltage power supply circuit and a rectifier connected in sequence; The wireless power supply coil includes a transmitting coil, a relay coil and a receiving coil connected in sequence; The parameters of the wireless power supply coil and the parameters of the constant current and constant voltage power supply circuit are determined based on the design method of a wireless energy transmission insulator for parallel power supply of multiple loads described in any one of claims 1 to 10.

12. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, a method for designing a wireless energy transfer insulator for parallel power supply of multiple loads as claimed in any one of claims 1 to 10 is implemented.

13. A computing device readable storage medium, characterized in that: An execution program is stored thereon, and when the execution program is executed, a design method for a wireless energy transmission insulator for parallel power supply of multiple loads as described in any one of claims 1 to 10 is implemented.

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