Topology self-switching wireless charging method and system based on tower online monitoring equipment

Abstract

The invention discloses a topology self-switching wireless charging method and system based on tower online monitoring equipment, and relates to the technical field of wireless circuit transmission. A wireless charging circuit is used as a carrier, one end of the wireless charging circuit is connected with an energy taking mutual inductor to obtain induction electric energy, and the other end of the wireless charging circuit directly supplies power to a storage battery of the tower online monitoring equipment; a wireless transmission mode is adopted in the whole process, and the defects of insulation performance reduction, complex installation and maintenance and the like caused by traditional wire connection are thoroughly overcome. Meanwhile, by means of the accuracy of parameter calculation and the rationality of element matching, in special environments of high voltage, strong electromagnetic interference and the like where the pole tower is located, circuit construction and operation cost can be reduced, energy transmission loss can be reduced, efficient and stable electric energy supply to the storage battery is achieved, and energy conservation and emission reduction are achieved. The defects of an existing power supply and charging scheme in the aspects of insulation safety and environment adaptability are effectively overcome, it is ensured that tower online monitoring equipment can continuously and stably operate, and reliable electric power guarantee is obtained.

Description

Technical Field

[0001] This invention relates to the field of wireless circuit transmission technology, and in particular to a topology-switching wireless charging method and system based on pole online monitoring equipment. Background Technology

[0002] Online monitoring equipment on high-voltage towers is a key component for the automation of power systems, capable of collecting a large amount of transmission line status data. To ensure stable operation of the equipment, charging and energy storage solutions are required. Traditionally, this relies on current transformers to extract energy from the transmission lines, transmitting power through conductors, and combining this with battery power supply. However, the risk of power outages on transmission lines and the special installation environment of the equipment place stringent requirements on the stability, safety, and insulation of the power supply.

[0003] The existing methods for powering online monitoring equipment on power poles have significant shortcomings: On the one hand, the mode of using current transformers to extract energy and then transmitting it to the equipment and batteries via wires has serious drawbacks. Because the current transformers are close to the transmission coils and the batteries are installed on the power poles, the wires directly connect the two, which severely affects the system's insulation performance and threatens the safety of the equipment and power transmission. On the other hand, for wireless charging technology for batteries, in order to achieve constant current-constant voltage charging, methods such as power control units, switching, and frequency switching are often used. This not only increases the system cost, but also makes the control circuit prone to malfunction due to electromagnetic interference near the transmission lines. Furthermore, there is power loss during the energy conversion and switching process, which reduces charging efficiency and stability. Summary of the Invention

[0004] This invention provides a topology-switching wireless charging method and system based on pole and tower online monitoring equipment. It solves the technical problem that existing power supply and charging solutions cannot achieve low-cost, efficient and stable power supply and battery charging for pole and tower online monitoring equipment while ensuring insulation performance, and cannot adapt to the charging reliability and stability requirements of pole and tower under special environments.

[0005] The first aspect of this invention provides a topology-switching wireless charging method based on an online tower monitoring device, applied to a wireless charging device, wherein one end of the wireless charging device is connected to an energy harvesting transformer and the other end is connected to the battery of the online tower monitoring device, comprising:

[0006] The equivalent circuit of the wireless charging device is constructed using the fundamental frequency approximation method.

[0007] Acquire target data for charging demand, coil mutual inductance calibration data, and basic data for energy harvesting transformers;

[0008] The circuit element update parameters of the equivalent circuit are calculated using the charging demand target data, the coil mutual inductance calibration data, and the energy harvesting transformer basic data.

[0009] The circuit elements are used to update the parameters and match the corresponding circuit elements, and a wireless charging circuit for the online monitoring device of the tower is constructed.

[0010] When the wireless charging circuit receives the induced voltage obtained by the energy harvesting transformer, it charges the battery.

[0011] Optionally, the target charging demand data includes the target charging current, system operating frequency, and target charging voltage; the coil mutual inductance calibration data includes the energy harvesting relay mutual inductance coefficient, the first relay charging control mutual inductance coefficient, and the second relay charging control mutual inductance coefficient; the energy harvesting transformer basic data includes the rated DC voltage; and the step of calculating the circuit element update parameters of the equivalent circuit using the target charging demand data, the coil mutual inductance calibration data, and the energy harvesting transformer basic data includes:

[0012] The charging current matching inductance value is determined using the target charging current, the system operating frequency, the energy harvesting relay mutual inductance coefficient, the first relay charging control mutual inductance coefficient, and the rated DC voltage.

[0013] The charging voltage matching inductance value is determined using the rated DC voltage, the target charging voltage, the energy harvesting relay mutual inductance coefficient, the second relay charging control mutual inductance coefficient, and the charging current matching inductance value.

[0014] The system operating frequency and the charging current are used to match the inductance value of the preset constant current compensation capacitor equation. The equation is then solved in combination with the preset coil reference inductance data to determine the constant current compensation capacitor.

[0015] The system operating frequency and the charging voltage are used to match the inductance value of the preset constant voltage compensation capacitor equation. The equation is then solved in combination with the preset coil reference inductance data to determine the constant voltage compensation capacitor.

[0016] The updated parameters of the circuit components include the charging current matching inductor value, the charging voltage matching inductor value, the constant current compensation capacitor, and the constant voltage compensation capacitor.

[0017] Optionally, determining the charging current matching inductance value using the target charging current, the system operating frequency, the power relay mutual inductance coefficient, the first relay charging control mutual inductance coefficient, and the rated DC voltage includes:

[0018] The first multiplication value is obtained by multiplying the mutual inductance coefficient of the energy relay with the rated DC voltage.

[0019] Convert the system's operating frequency into its operating angular frequency;

[0020] The second multiplication value is obtained by multiplying the operating angular frequency, the first relay charging control mutual inductance coefficient, and the target charging current.

[0021] The charging current matching inductance value is obtained by performing a ratio calculation between the first multiplier and the second multiplier.

[0022] Optionally, determining the charging voltage matching inductance value using the rated DC voltage, the target charging voltage, the energy harvesting relay mutual inductance coefficient, the second relay charging control mutual inductance coefficient, and the charging current matching inductance value includes:

[0023] The target charging voltage and the charging current are multiplied by the matching inductance value to obtain a third multiplication value;

[0024] The third multiplication value is multiplied by the second relay charging control mutual inductance coefficient to obtain the fourth multiplication value;

[0025] The fifth multiplier is obtained by multiplying the fourth multiplier with the preset first inductance coefficient.

[0026] The sixth multiplication value is obtained by multiplying the rated DC voltage with the mutual inductance coefficient of the energy relay.

[0027] The sixth multiplier is multiplied by a preset second inductance coefficient to obtain the seventh multiplier.

[0028] The charging voltage matching inductance value is obtained by performing a ratio calculation between the fifth multiplier and the seventh multiplier.

[0029] Optionally, the step of using the circuit element to update the parameters and match the corresponding circuit element, and constructing the wireless charging circuit for the pole online monitoring device, includes:

[0030] The target key is constructed by using different types of parameters within the updated parameters of the circuit element;

[0031] The target keys are used to retrieve the preset circuit element key-value pair database and match the circuit elements corresponding to the different types of parameters.

[0032] The equivalent circuit is updated using each of the described circuit elements to construct an initial coupled circuit;

[0033] The initial coupling circuit is tested for continuity and insulation. Based on the initial coupling circuit that passes the test, the wireless charging circuit of the pole online monitoring device is constructed.

[0034] Optionally, the step of charging the battery when the wireless charging circuit receives the induced voltage obtained by the energy harvesting transformer includes:

[0035] When the wireless charging circuit receives the induced voltage obtained by the energy transformer, it performs rectification and filtering operations on the induced voltage through the first preset rectification and filtering circuit to obtain a DC voltage.

[0036] The DC voltage is inverted and converted to obtain an inverter current;

[0037] The inverter current is coupled with a magnetic field to obtain an induced current.

[0038] The induced current is coupled with a secondary magnetic field to obtain the induced current of the first coil and the induced current of the second coil.

[0039] Compare the induced current of the first coil with the induced current of the second coil;

[0040] When the induced current of the first coil is greater than the induced current of the second coil, the induced current of the first coil is rectified and filtered by the second preset rectifier and filter circuit to obtain the target DC current.

[0041] When the induced current of the first coil is less than or equal to the induced current of the second coil, the induced current of the second coil is rectified and filtered by the third preset rectifier and filter circuit to obtain the target DC current.

[0042] The target DC power is connected to the battery for charging.

[0043] The second aspect of this invention provides a topology-switching wireless charging system based on an online tower monitoring device, applied to a wireless charging device, wherein one end of the wireless charging device is connected to an energy harvesting transformer and the other end is connected to the battery of the online tower monitoring device, comprising:

[0044] Equivalent module, used to construct the equivalent circuit of the wireless charging device using the fundamental wave approximation method;

[0045] The acquisition module is used to acquire target data of charging demand, coil mutual inductance calibration data and basic data of energy harvesting transformer;

[0046] The calculation module is used to calculate the updated circuit element parameters of the equivalent circuit using the charging demand target data, the coil mutual inductance calibration data, and the energy harvesting transformer basic data;

[0047] A construction module is used to update the parameters of the circuit elements to match the corresponding circuit elements and construct the wireless charging circuit of the pole online monitoring device;

[0048] The charging module is used to charge the battery when the wireless charging circuit receives the induced voltage obtained by the energy harvesting transformer.

[0049] A third aspect of the present invention provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor causes the processor to perform the steps of the topology self-switching wireless charging method based on the pole online monitoring device as described in any of the preceding claims.

[0050] The fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the topology self-switching wireless charging method based on a pole-tower online monitoring device as described in any of the preceding claims.

[0051] The fifth aspect of the present invention provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, wherein, when the program instructions are executed by a computer, the computer performs the topology self-switching wireless charging method based on a pole online monitoring device as described in any of the preceding claims.

[0052] As can be seen from the above technical solutions, the present invention has the following advantages:

[0053] This invention provides a topology-switching wireless charging method and system based on online tower monitoring equipment. Using an equivalent circuit model constructed through the fundamental wave approximation method, combined with the charging demand target, measured coil mutual inductance values, and basic parameters of the energy harvesting transformer, the parameter specifications of key circuit components are accurately calculated, and then the components are matched to build a complete wireless charging circuit. This invention uses a wireless charging circuit as a carrier. One end of the wireless charging circuit connects to the energy harvesting transformer to obtain induced electrical energy, while the other end directly supplies power to the battery of the online tower monitoring equipment. The entire process uses wireless transmission, completely eliminating the drawbacks of traditional wire connections, such as decreased insulation performance and complex installation and maintenance. Simultaneously, thanks to the accuracy of parameter calculation and the rationality of component matching, even in special environments such as high voltage and strong electromagnetic interference where towers are located, it can reduce circuit construction and operating costs, minimize energy transmission losses, and achieve efficient and stable power supply to the battery. This effectively solves the shortcomings of existing power supply and charging solutions in terms of insulation safety and environmental adaptability, ensuring the continuous and stable operation of the online tower monitoring equipment and obtaining reliable power supply. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a flowchart illustrating the steps of a topology-automatic wireless charging method based on an online tower monitoring device, as provided in Embodiment 1 of the present invention.

[0056] Figure 2 This is a schematic diagram of the installation of a conventional charging device provided by the present invention;

[0057] Figure 3 An installation diagram of the wireless charging device provided by the present invention;

[0058] Figure 4 A schematic diagram of the equivalent circuit of the wireless charging device provided by the present invention;

[0059] Figure 5 A schematic diagram of the wireless charging circuit for the online monitoring device for power poles provided by this invention;

[0060] Figure 6 A schematic diagram of the equivalent circuit of the system in constant current mode provided by the present invention;

[0061] Figure 7 This is a schematic diagram of the equivalent circuit of the system under constant voltage mode provided by the present invention;

[0062] Figure 8 A structural block diagram of a topology-switching wireless charging system based on an online tower monitoring device provided in an embodiment of the present invention;

[0063] Figure 9 This is a structural block diagram of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0064] This invention provides a topology-switching wireless charging method and system based on online tower monitoring equipment. It addresses the technical problem that existing power supply and charging solutions cannot achieve low-cost, efficient, and stable power supply and battery charging for online tower monitoring equipment while ensuring insulation performance, and cannot meet the requirements for charging reliability and stability under the special environment of towers.

[0065] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0066] Please see Figure 2 Traditional online testing equipment power supply methods such as Figure 2As shown, the red part is the insulator, with its two ends connected to the transmission line and the transmission tower, respectively. For ease of maintenance and safety considerations, online monitoring equipment is usually installed on the transmission tower. However, to obtain a larger amount of electrical energy, the instrument transformer needs to be close to the transmission line. The two are connected by a conductor, which affects the insulation performance to some extent.

[0067] The existing charging method using current transformers requires connecting the current transformer to the battery via a wire, and the battery also needs an additional charging control unit. This presents the following problems: the current transformer is installed near the transmission coil, and the battery is installed on the tower. The two are directly connected by a wire, which affects the system's insulation performance.

[0068] There is considerable research on wireless charging systems for battery charging, but the following problems exist: 1) Power regulation requires the addition of a power conversion unit, which increases system cost. Furthermore, the components in the power conversion unit are not ideal, resulting in power loss. 2) Switching requires the addition of a monitoring unit, which increases system cost. In order to avoid peaks during switching, a zero-crossing comparator is usually added for switching at the AC voltage zero-crossing point. 3) Frequency switching requires the addition of a monitoring unit, which increases system cost. Furthermore, in order to avoid peaks during switching, a zero-crossing comparator is usually added for switching at the AC voltage zero-crossing point.

[0069] This invention aims to solve the following problems:

[0070] 1. Wireless charging technology is used to achieve electrical isolation between the power transformer and the battery, reducing the impact of the charging system on the insulation performance of the transmission line;

[0071] 2. Utilizing the unidirectional flow characteristic of the rectifier unit and employing a dual-receiving coil structure, the receiving coils are switched by varying their output voltages, thereby achieving a switch in the compensation topology and ultimately a switch in the output characteristics. Since the entire process is automatic, no control circuitry is required, reducing costs.

[0072] 3. This invention only requires adjusting the parameters of the compensation element to adjust the charging current and voltage, and can be applied to any coil structure.

[0073] This invention proposes a topology-switching wireless charging system, the installation diagram of which is shown below. Figure 3 As shown, the power transformer is installed close to the transmission line. The power it receives is used to power the online monitoring equipment via a wireless charging system. The online monitoring equipment is installed on the transmission tower. Since wireless power transmission technology can achieve contactless power transmission, that is, there is no direct wire connection between the power transformer and the online monitoring equipment, the impact on the insulation performance of the transmission line is small.

[0074] Please see Figure 1 , Figure 1This is a flowchart illustrating the steps of a topology-switching wireless charging method based on an online tower monitoring device, as provided in Embodiment 1 of the present invention.

[0075] This invention provides a topology-switching wireless charging method based on a tower online monitoring device, applied to a wireless charging device. One end of the wireless charging device is connected to an energy harvesting transformer, and the other end is connected to the battery of the tower online monitoring device. The method includes:

[0076] Step 101: Construct the equivalent circuit of the wireless charging device using the fundamental frequency approximation method.

[0077] The fundamental frequency approximation method refers to a circuit simplification analysis method. Specifically, in circuits containing alternating signals, it ignores higher harmonic components in the signal whose frequencies are integer multiples of the fundamental frequency, and uses only the fundamental frequency component as the analysis object to construct a simplified equivalent circuit. Its core purpose is to reduce the complexity of circuit modeling and parameter calculation while ensuring that the analysis accuracy meets engineering requirements.

[0078] A wireless charging device is a device used to provide charging power to the batteries of online monitoring equipment for power poles. One end is connected to an energy transformer to obtain induced power, and the other end is connected to the battery. The core consists of a rectifier and filter circuit, an inverter circuit, and coupling coils (transmitting coil, relay coil, and receiving coil), etc. Energy is transferred through wireless magnetic coupling.

[0079] An energy harvesting transformer is a device installed on a power pole that can obtain electrical energy from the electromagnetic field around the high-voltage line. Its core function is to output the induced alternating voltage to provide an initial power source for wireless charging devices. It has the characteristics of contactless energy harvesting and adaptability to high-voltage environments.

[0080] A rectifier and filter circuit refers to a circuit used for the conversion and stabilization of electrical energy. "Rectification" refers to the process of converting alternating current (or voltage) into unidirectional pulsating direct current, and "filtering" refers to the process of suppressing the pulsating component in unidirectional pulsating direct current through components such as capacitors and inductors to output stable direct current. This invention includes first, second, and third preset rectifier and filter circuits, which are used to process the induced voltage of the energy harvesting transformer, the induced current of the first coil, and the induced current of the second coil, respectively.

[0081] An inverter circuit is a circuit that converts direct current into alternating current. In this invention, it is used to convert the stable direct current output by the first preset rectifier and filter circuit into an alternating current that meets the fundamental frequency requirements, so as to provide an alternating current for the transmitting coil to generate an alternating magnetic field. It is a key circuit module for realizing wireless magnetic coupling energy transmission.

[0082] A coupling coil refers to a coil group used to realize wireless magnetic coupling energy transmission. It includes a transmitting coil, a relay coil, and a receiving coil. When an alternating current is passed through the transmitting coil, it generates an alternating magnetic field. The relay coil is in the alternating magnetic field and induces a current, generating a secondary alternating magnetic field to expand the magnetic field range. The receiving coil is in the alternating magnetic field and induces a current. Together, the three form a channel for wireless energy transmission.

[0083] The alternating voltage source V1 refers to the ideal power supply element used in the equivalent circuit to replace the combined module of "energy harvesting transformer + first preset rectifier filter circuit + inverter circuit". Its output is an alternating voltage at the fundamental frequency, which can reflect the core electrical characteristics of the combined module to output energy to the subsequent coupling coil.

[0084] AC resistance R ac In the equivalent circuit, the ideal resistive element is used to replace the combined module of "second preset rectifier filter circuit / third preset rectifier filter circuit + battery". Its resistance value reflects the equivalent load characteristics of the combined module as an energy receiving end and characterizes the equivalent resistance value of energy absorbed by the battery.

[0085] Compensation capacitors C1, C2, C4, C5, and C6 refer to capacitor elements set in the equivalent circuit to ensure that the circuit is in a resonant state at the system operating frequency and to reduce reactive power loss during energy transmission. Their capacitance values ​​need to be calculated and determined based on the inductance parameters in the equivalent circuit and the system operating frequency. They are divided into constant current compensation capacitors (adapted to constant current charging mode) and constant voltage compensation capacitors (adapted to constant voltage charging mode).

[0086] Inductors L1, L2, L3, L4, L5, and L6 refer to ideal components in the equivalent circuit that simulate the characteristics of a coil storing magnetic field energy and impeding changes in current. Their inductive reactance is jωM, where ω is the angular frequency.

[0087] Mutual inductance M 23 M 34 M 35 , refers to the parameter that reflects the mutual induced electromotive force generated between two coils due to magnetic coupling, and reflects the degree of correlation in energy transfer between the coils. The mutual inductance reactance is jωM.

[0088] An equivalent circuit is a circuit model that has the same external electrical characteristics as the actual circuit under specific operating conditions (including but not limited to the fundamental frequency) by replacing the complex modules in the actual circuit with simplified ideal circuit elements (such as alternating power supply, resistor, inductor, and capacitor) based on the functional characteristics and energy transfer laws of the actual circuit.

[0089] In this embodiment of the invention, the equivalent circuit of the wireless charging device is constructed using the fundamental frequency approximation method, such as... Figure 4As shown, for the actual circuit of the wireless charging device, the influence of higher harmonics is ignored, and only the fundamental component is considered for modeling. The part of the device that provides electrical energy is equivalent to an AC voltage source V1; each coil (transmitter, repeater, receiver, etc.) is equivalent to an inductor L1, L2, L3, L4, L5, L6 according to its electromagnetic characteristics. The magnetic coupling between the coils is achieved through mutual inductance M. 23 M 34 M 35 This reflects the correlation of energy transfer between coils; capacitors C1, C2, C4, C5, and C6, based on their capacitive reactance characteristics, are equivalent to 1 / jωM, used to compensate for reactive power in the circuit and adjust the resonance state; the energy receiving and dissipating part at the load end is equivalent to an AC resistance R. ac Ultimately, an equivalent circuit is formed, which includes a voltage source, inductor, mutual inductance, capacitor, and resistor, and can reflect the energy transfer law at the fundamental frequency of the device.

[0090] Step 102: Obtain target charging demand data, coil mutual inductance calibration data, and basic data of the energy harvesting transformer.

[0091] In this embodiment of the invention, target charging demand data, coil mutual inductance calibration data, and basic data of the energy harvesting transformer are acquired. For the target charging demand data, key values ​​such as the required charging current and voltage of the battery need to be determined by connecting to the battery management system of the online monitoring equipment or referring to the equipment manual. These data determine the energy specifications that the wireless charging device should output, ensuring that the charging process meets the requirements for normal equipment operation and battery maintenance. The acquisition of coil mutual inductance calibration data relies on professional mutual inductance measuring instruments to measure the mutual inductance values ​​between each pair of the transmitting coil, relay coil, and receiving coil. Since factors such as coil installation location and surrounding environment can affect mutual inductance, on-site calibration must be performed in different installation scenarios to obtain accurate data reflecting the tightness of magnetic coupling between the coils, providing a basis for subsequent circuit performance analysis and parameter calculation. The basic data of the energy harvesting transformer comes from its product nameplate and factory test report, covering key parameters such as rated voltage, rated current, and transformation ratio. These data can intuitively reflect the range of power harvesting transformer's ability to obtain power from high-voltage lines on towers. At the same time, by actually measuring the real-time data such as the output voltage and current of the energy harvesting transformer during operation, combined with the basic parameters, it is possible to assess whether its working status is normal, thereby providing comprehensive and reliable data support for the power input link of the entire wireless charging device.

[0092] Step 103: Calculate the updated circuit element parameters of the equivalent circuit using the charging demand target data, coil mutual inductance calibration data, and energy harvesting transformer basic data.

[0093] Furthermore, the target charging demand data includes the target charging current, system operating frequency, and target charging voltage; the coil mutual inductance calibration data includes the mutual inductance coefficient of the energy harvesting relay, the mutual inductance coefficient of the first relay charging control, and the mutual inductance coefficient of the second relay charging control; and the basic data of the energy harvesting transformer includes the rated DC voltage. Step 103 may include the following sub-steps:

[0094] S11. Determine the charging current matching inductance value using the target charging current, system operating frequency, energy relay mutual inductance coefficient, first relay charging control mutual inductance coefficient, and rated DC voltage.

[0095] Furthermore, S11 may include the following sub-steps:

[0096] S111. The first multiplication value is obtained by multiplying the mutual inductance coefficient of the energy relay with the rated DC voltage.

[0097] S112. Convert the system operating frequency to the operating angular frequency;

[0098] It should be noted that, based on the operating angular frequency With system operating frequency Relationship Perform the conversion.

[0099] S113. The second multiplication value is obtained by multiplying the operating angular frequency, the first relay charging control mutual inductance coefficient, and the target charging current.

[0100] S114. The first multiplier and the second multiplier are used to perform a ratio calculation to obtain the charging current matching inductance value.

[0101] The target charging current refers to the current setting value that the wireless charging device expects to output to charge the load (such as a battery). It determines the charging rate and the rhythm of power replenishment to the load and is a core requirement indicator for circuit parameter design.

[0102] The system operating frequency refers to the frequency of the AC output power from the inverter circuit in the wireless charging device. It reflects the rate of periodic change of the AC signal and affects the magnetic coupling characteristics of the coil and the resonant state of the circuit. The unit is Hertz.

[0103] The mutual inductance coefficient of the energy harvesting relay refers to the parameter describing the degree of magnetic coupling between the energy harvesting coil and the relay coil. It reflects the ability of the two coils to generate induced electromotive force due to the correlation of magnetic flux. The larger the value, the stronger the magnetic coupling and the easier the energy transfer. The unit is Henry.

[0104] The first relay charging control mutual inductance coefficient refers to the parameter characterizing the magnetic coupling characteristics between the relay coil and the charging control related coil (such as the associated coil on the receiving coil side). It is used to quantify the degree of correlation of energy transfer between the two coils and has a key impact on the regulation of charging current. The unit is Henry.

[0105] Rated DC voltage refers to the rated value of the DC output after rectification and filtering by the energy transformer. It represents the basic voltage of DC power that the wireless charging device can stably provide and is a key parameter on the energy input side. The unit is volts.

[0106] Operating angular frequency refers to a physical quantity that describes the rate of change of the phase of an alternating current signal over time.

[0107] The charging current matching inductance value refers to the inductance parameter calculated through the above steps, which is used to adapt the output current of the wireless charging device to the target charging current. It determines the selection and specifications of inductor components in the circuit and affects the energy transmission and resonance characteristics of the circuit. The unit is Henry.

[0108] The above process can be converted into a formula, as follows:

[0109]

[0110] In the formula, This indicates the charging current matching the inductance value. This represents the mutual inductance coefficient of the energy relay. Indicates the rated DC voltage. Indicates the operating angular frequency. This represents the mutual inductance coefficient of the first relay charging control. This indicates the target charging current.

[0111] S12. Determine the charging voltage matching inductance value using the rated DC voltage, target charging voltage, energy relay mutual inductance coefficient, second relay charging control mutual inductance coefficient, and charging current matching inductance value.

[0112] Furthermore, S12 may include the following sub-steps:

[0113] S121. Multiply the target charging voltage and the charging current by the matching inductance value to obtain the third multiplication value;

[0114] S122. The third multiplier is multiplied by the second relay charging control mutual inductance coefficient to obtain the fourth multiplier.

[0115] S123. Perform a multiplication operation by using the fourth multiplier and the preset first inductance coefficient to obtain the fifth multiplier;

[0116] S124. The sixth multiplication value is obtained by multiplying the rated DC voltage with the mutual inductance coefficient of the energy-collecting relay.

[0117] S125. Perform a multiplication operation by multiplying the sixth multiplier with the preset second inductance coefficient to obtain the seventh multiplier;

[0118] S126. The fifth multiplier and the seventh multiplier are used to perform a ratio calculation to obtain the charging voltage matching inductance value.

[0119] The target charging voltage refers to the set value that the wireless charging device expects to output to meet the charging voltage requirements of the load (such as a battery). It is a key voltage indicator to ensure normal charging of the load and stable operation of the equipment.

[0120] The charging current matching inductance value refers to the inductance parameter calculated in step S11, which is used to adapt to the target charging current. It affects the current transmission characteristics and energy conversion efficiency in the circuit and provides basic data for the calculation in step S12.

[0121] The mutual inductance coefficient of the second relay charging control refers to the parameter characterizing the degree of magnetic coupling between the relay coil and another set of charging control related coils (distinct from the first relay). It reflects the ability of the two coils to generate induced electromotive force due to the correlation of magnetic flux and plays a key role in the regulation of charging voltage. The unit is Henry.

[0122] The preset first inductance coefficient refers to a coefficient pre-set based on circuit design requirements, component characteristics, and other factors. It is used to adjust the calculation result of the fifth multiplication value to adapt to the inductance parameter calculation requirements of the actual circuit. It is a dimensionless constant and is preferably... .

[0123] Rated DC voltage refers to the rated voltage value of the DC output after rectification and filtering of the energy transformer. It represents the stable DC voltage on the energy input side of the wireless charging device and is the basic parameter for the sixth multiplication operation in step S12. The unit is volts.

[0124] The mutual inductance coefficient of the energy harvesting coil and the relay coil refers to the parameter describing the degree of magnetic coupling between the energy harvesting coil and the relay coil. It reflects the ability of the magnetic flux of the two coils to generate induced electromotive force. It participates in the sixth multiplication operation in step S12, and its unit is Henry.

[0125] The preset second inductance coefficient refers to a coefficient pre-set based on circuit design requirements and component characteristics. It is used to adjust the calculation result of the seventh multiplication value, adapting to the inductance parameter calculation scenario of the actual circuit. It is a dimensionless constant and is preferably... .

[0126] The charging voltage matching inductance value refers to the inductance parameter obtained through step S12, which is used to adapt the output voltage of the wireless charging device to the target charging voltage. It determines the selection specifications of the corresponding inductor component and affects the voltage transmission and resonance characteristics of the circuit. The unit is Henry.

[0127] The above process can be converted into a formula, as follows:

[0128]

[0129] In the formula, This indicates the charging voltage matching the inductance value. This indicates the preset first inductance coefficient. This represents the mutual inductance coefficient of the second relay charging control. Indicates the target charging voltage. This indicates the preset second inductance coefficient.

[0130] S13. The system operating frequency and charging current are used to match the inductance value of the preset constant current compensation capacitor equation. The equation is then solved in combination with the preset coil reference inductance data to determine the constant current compensation capacitor.

[0131] The preset coil reference inductance data includes the reference inductance value of the transmitting coil, the reference inductance value of the relay coil, and the reference inductance value of the first receiving coil.

[0132] The preset constant current compensation capacitor equation is as follows:

[0133]

[0134] In the formula, Represents the imaginary unit. This indicates the reference inductance value of the transmitting coil. This indicates the reference inductance value of the relay coil. This indicates the reference inductance value of the first receiving coil. This represents the first constant current compensation capacitor. This indicates the second constant current compensation capacitor. This indicates the third constant current compensation capacitor. This indicates the fourth constant current compensation capacitor.

[0135] In this embodiment of the invention, the system operating frequency is converted into the operating angular frequency, and then the operating angular frequency, the reference inductance value of the transmitting coil, the reference inductance value of the relay coil, the reference inductance value of the first receiving coil, and the charging current matching inductance value are used to input the preset constant current compensation capacitor equation for solving, thereby obtaining the constant current compensation capacitor. The constant current compensation capacitor includes a first constant current compensation capacitor, a second constant current compensation capacitor, a third constant current compensation capacitor, and a fourth constant current compensation capacitor.

[0136] It should be noted that the equivalent diagram is a simplified illustration, omitting details of local resonances. However, in actual circuits, the relay coil need Compensating for capacitive reactance and canceling inductive reactance achieves resonance, ensuring efficient energy transfer. Furthermore, the formula derivation requires completing this detail to calculate the correct compensation capacitor, enabling the system to maintain stable constant current charging. Therefore, a solution is needed. .

[0137] To facilitate understanding, a simplified transformation process is provided below:

[0138] In the resonant state of an AC circuit, the inductive reactance of the inductor and the capacitive reactance of the capacitor They will cancel each other out, making the circuit purely resistive (with the highest energy transfer efficiency). When expressed in complex numbers, this cancellation is manifested as " ".

[0139] In order to eliminate the denominator Using the rationalization of complex numbers , Since it is the imaginary unit, therefore:

[0140]

[0141] Substitute into the original equation:

[0142]

[0143] Extract common factors :

[0144]

[0145] because (Imaginary unit), therefore the part inside the parentheses must be 0, so:

[0146]

[0147] By rearranging and simplifying, we get:

[0148] .

[0149] Therefore, through the above deformation process, the expressions for each constant current compensation capacitor can be obtained. With n=1, 2, 3, 4, by substituting the operating angular frequency, the reference inductance value of the transmitting coil, the reference inductance value of the relay coil, the reference inductance value of the first receiving coil, and the charging current matching inductance value, we can obtain the first constant current compensation capacitor, the second constant current compensation capacitor, the third constant current compensation capacitor, and the fourth constant current compensation capacitor.

[0150] S14. The system operating frequency and charging voltage are used to match the inductance value of the preset constant voltage compensation capacitor equation. The equation is then solved in combination with the preset coil reference inductance data to determine the constant voltage compensation capacitor.

[0151] The preset coil reference inductance data also includes the second receiving coil reference inductance value.

[0152] The pre-set constant voltage compensation capacitor equation is as follows:

[0153]

[0154] In the formula, This indicates the reference inductance value of the second receiving coil. This refers to the first constant voltage receiving compensation capacitor. This indicates the second constant voltage receiving compensation capacitor.

[0155] It should be noted that, , , The capacitors are the same as the first, second, and third constant current compensation capacitors mentioned above, so there is no need to solve them again.

[0156] In this embodiment of the invention, the system operating frequency is converted into the operating angular frequency, and then the operating angular frequency, the charging voltage matching inductance value, and the second receiving coil reference inductance value are used as inputs to solve the preset constant voltage compensation capacitor equation to obtain the constant voltage compensation capacitor, which includes a first constant voltage compensation capacitor and a second constant voltage compensation capacitor.

[0157] It should be noted that the solution process for the preset constant voltage compensation capacitor equation is the same as the solution process for the preset constant current compensation capacitor equation, and will not be repeated here.

[0158] The updated circuit component parameters include the charging current matching inductor value, the charging voltage matching inductor value, the constant current compensation capacitor, and the constant voltage compensation capacitor.

[0159] Step 104: Use circuit element update parameters to match the corresponding circuit elements, and construct the wireless charging circuit for the pole online monitoring equipment.

[0160] Furthermore, step 104 may include the following sub-steps:

[0161] S21. Use circuit elements to update different types of parameters within the parameters to construct target keys respectively;

[0162] S22. Use each target key to search the preset circuit element key-value pair database and match the circuit elements corresponding to each type of parameter.

[0163] S23. Update the equivalent circuit using each circuit element to construct the initial coupling circuit;

[0164] S24. Perform continuity and insulation checks on the initial coupling circuit, and construct the wireless charging circuit for the pole online monitoring equipment based on the verified initial coupling circuit.

[0165] The circuit component update parameters refer to the set of key parameters used to update the equivalent circuit components of wireless charging. These parameters include the charging current matching inductance value, the charging voltage matching inductance value, as well as the constant current compensation capacitors (first to fourth) and the constant voltage compensation capacitors (first and second). They serve as the basis for circuit component selection and circuit construction.

[0166] The target key refers to a retrieval identifier constructed based on the type of updated parameters of circuit components (such as inductors, different functional compensation capacitors), which is used to accurately locate the corresponding circuit components in the database to ensure that the parameters and components are compatible.

[0167] The preset circuit component key-value pair database refers to a database that pre-stores the correspondence between circuit component parameters (such as inductance and capacitance) and component models and specifications, supporting quick retrieval of matching components by target key.

[0168] The initial coupling circuit refers to the preliminary wireless charging circuit built by replacing the virtual parameters of the equivalent circuit with matched circuit elements. It includes transmitting, relaying, and receiving coils and a fully compensated capacitor, and has the basic structure for energy transmission.

[0169] Continuity and insulation verification refers to whether the energy transmission circuit of the continuity test is conducting and whether there is a short circuit; insulation verification tests the insulation performance of the live parts of the circuit and the grounding part of the tower to ensure the safety of the circuit and the tower.

[0170] The wireless charging circuit for pole and tower online monitoring equipment refers to a circuit that, after component matching, circuit construction, and verification, can stably wirelessly charge the pole and tower online monitoring equipment, realizing energy harvesting, transmission, and conversion, and adapting to pole and tower scenarios.

[0171] In this embodiment of the invention, the circuit element update parameters include charging current matching inductor value, charging voltage matching inductor value, constant current compensation capacitor, and constant voltage compensation capacitor. The constant current compensation capacitor includes a first constant current compensation capacitor, a second constant current compensation capacitor, a third constant current compensation capacitor, and a fourth constant current compensation capacitor. The constant voltage compensation capacitor includes a first constant voltage compensation capacitor and a second constant voltage compensation capacitor. Corresponding target keys are constructed according to these parameter types. These target keys are input into a preset circuit element key-value pair database for retrieval, accurately matching the corresponding inductors, constant current / constant voltage compensation capacitors, and other circuit elements. Then, the matched elements are used to replace the virtual parameters in the equivalent circuit, constructing an initial coupling circuit including transmitting, repeating, and receiving coils and a fully compensated capacitor. The initial coupling circuit undergoes continuity testing (ensuring the energy transmission loop is conductive and free of short circuits) and insulation verification (to avoid affecting the original insulation of the tower). The initial coupling circuit that passes the verification is coupled with a first preset rectifier filter circuit, a second preset rectifier filter circuit, and a third preset rectifier filter circuit to construct the wireless charging circuit for the tower online monitoring device, specifically as follows: Figure 5 As shown, stable power supply and charging are achieved through a wireless charging circuit.

[0172] Step 105: When the wireless charging circuit receives the induced voltage obtained by the energy harvester, it charges the battery.

[0173] Furthermore, step 105 may include the following sub-steps:

[0174] S31. When the wireless charging circuit receives the induced voltage obtained by the energy transformer, it performs rectification and filtering operations on the induced voltage through the first preset rectification and filtering circuit to obtain DC voltage.

[0175] In this embodiment of the invention, when the wireless charging circuit receives the induced voltage from the energy harvesting transformer, the induced voltage first enters the "energy harvesting and power conversion section," and is rectified by the rectifier circuit 1 (i.e., the first preset rectifier and filter circuit). The alternating induced voltage is then rectified using the unidirectional conduction characteristic of the diodes, and filtered by the capacitors and inductors, converting the alternating induced voltage into a stable DC voltage V. dc This provides backup power for the subsequent inverter stage, enabling the energy conversion chain to start its first step.

[0176] It is worth mentioning that the first preset rectifier and filter circuit includes a rectifier bridge module and a filter circuit module. The rectifier bridge module consists of a bridge rectifier structure composed of four Schottky diodes (D1-D4). The output terminal of the secondary winding of the current transformer is connected to the AC input pin of the rectifier bridge (the diagonal end of the diode bridge). The DC output pin of the rectifier bridge (the other diagonal end) is connected to the filter circuit. The filter circuit module includes an electrolytic capacitor C. in and inductor L filt An electrolytic capacitor C is first connected in parallel to the DC output terminal of the rectifier bridge. in Filtering (removing low-frequency ripple), inductor L filt Connected in series with the capacitor, it forms an LC filter to enhance high-frequency filtering and ultimately output a stable DC V. dc To the inverter circuit.

[0177] S32. Invert and convert DC voltage to obtain inverter current;

[0178] Inverter current refers to the high-frequency alternating current output from the inverter bridge, which is injected into the transmitting coil L2 to generate an alternating magnetic field. Figure 5 The current i2 flowing through L2.

[0179] In this embodiment of the invention, the stable DC voltage output by the rectifier circuit 1 is connected to the inverter bridge (composed of switching transistors S1-S4) of the "energy extraction and power conversion section". By controlling the switching transistors to alternately turn on and off at a high frequency period (such as the system resonant frequency), the DC voltage is inverted into a high frequency alternating current i2. This current is injected into the transmitting coil L2 to provide energy for subsequent magnetic field coupling, realizing the conversion from DC to high frequency AC and driving the transmitting coil to establish an alternating magnetic field.

[0180] S33. Perform a magnetic field coupling on the inverter current to obtain the induced current;

[0181] Primary magnetic field coupling refers to the energy transfer process between the transmitting coil L2 and the relay coil L3 through an alternating magnetic field, relying on mutual inductance M. 23 Establishing a magnetic field connection is the energy transfer method in wireless charging relay stages.

[0182] The induced current i3 refers to the alternating current generated by the relay coil L3 due to electromagnetic induction after one magnetic field coupling, which is the energy output of one coupling.

[0183] In this embodiment of the invention, after the inverter current i2 is injected into the transmitting coil L2, the alternating magnetic field it generates covers the relay coil L3. Due to the principle of electromagnetic induction, the relay coil L3 and the transmitting coil L2 achieve a primary magnetic field coupling (through mutual inductance M). 23 (Associated), a current i3 is induced in the relay coil L3. This induced current i3 becomes the output of the primary magnetic field coupling, providing the energy basis for the subsequent secondary magnetic field coupling, allowing energy to be transferred from the transmitting side to the relay side through the magnetic field.

[0184] S34. Perform secondary magnetic field coupling on the induced current to obtain the induced current of the first coil and the induced current of the second coil;

[0185] Secondary magnetic field coupling refers to the energy transfer process between relay coil L3 and receiving coils L4 and L5 via an alternating magnetic field, relying on mutual inductance M. 34 M 35 Establishing a magnetic field connection is a method of energy distribution in the wireless charging receiving stage.

[0186] The first coil induced current i4 refers to the alternating current generated by electromagnetic induction in the receiving coil L4 after secondary magnetic field coupling, which is one energy output of the secondary coupling.

[0187] The second coil induced current i5 refers to the alternating current generated by electromagnetic induction in the receiving coil L5 after secondary magnetic field coupling, which is another energy output of the secondary coupling.

[0188] In this embodiment of the invention, the induced current i3 flowing in the relay coil L3 generates an alternating magnetic field. The receiving coils L4 and L5, which are within the coverage area of ​​this magnetic field, are coupled by means of a secondary magnetic field (through mutual inductance M). 34 M 35 (Associated), current i4 is induced in L4 and current i5 is induced in L5 respectively, that is, the induced current of the first coil and the induced current of the second coil, realizing the transfer of energy from the relay coil to the dual receiving coils.

[0189] S35. Compare the induced current of the first coil with the induced current of the second coil;

[0190] In this embodiment of the invention, the induced current of the first coil is compared with the induced current of the second coil.

[0191] S36. When the induced current of the first coil is greater than the induced current of the second coil, the induced current of the first coil is rectified and filtered by the second preset rectifier and filter circuit to obtain the target DC current.

[0192] The second preset rectifier and filter circuit (rectifier circuit 2) refers to the circuit that performs AC-DC conversion, filtering and voltage regulation on the induced current of the first coil, and outputs the target DC power.

[0193] In this embodiment of the invention, when the induced current of the first coil is greater than the induced current of the second coil, the induced current of the first coil flows into the second preset rectifier filter circuit (i.e., rectifier circuit 2). This circuit first converts the alternating induced current into pulsating DC by a rectifier bridge composed of diodes, and then removes the ripple through a filter network composed of capacitors and inductors (such as parallel electrolytic capacitors and series inductors) to output a stable target DC to charge the battery.

[0194] It is worth mentioning that the second preset rectifier and filter circuit includes a rectifier bridge and a filter network. The rectifier bridge consists of a bridge structure composed of four diodes (such as fast recovery diodes). The output terminal of the receiving coil L4 is connected to the AC input pin of the rectifier bridge. Utilizing the unidirectional conductivity of the diodes, the alternating induced current of the first coil is converted into pulsating DC. The filter network includes a large-capacity electrolytic capacitor. A large-capacity electrolytic capacitor is connected in parallel to the DC output terminal of the rectifier bridge to filter out low-frequency ripple. The large-capacity electrolytic capacitor is connected in series with a small inductor to form an LC filter with the capacitor, further suppressing high-frequency ripple.

[0195] S37. When the induced current of the first coil is less than or equal to the induced current of the second coil, the induced current of the second coil is rectified and filtered by the third preset rectifier and filter circuit to obtain the target DC current.

[0196] The third preset rectifier and filter circuit (rectifier circuit 3) refers to the circuit that performs AC-DC conversion, filtering and voltage regulation on the induced current of the second coil, and outputs the target DC power.

[0197] In this embodiment of the invention, when the induced current of the first coil is less than or equal to the induced current of the second coil, the induced current of the second coil flows into the third preset rectifier filter circuit (i.e., rectifier circuit 3). This circuit first converts the alternating induced current of the second coil into pulsating DC by a diode rectifier bridge, and then filters out the ripple through a filter network composed of capacitors and inductors (such as parallel electrolytic capacitors and series inductors) to output a stable target DC to charge the battery.

[0198] It is worth mentioning that the third preset rectifier and filter circuit includes a rectifier bridge and a filter network. The rectifier bridge consists of a bridge structure composed of four diodes (such as fast recovery diodes). The output terminal of the receiving coil L5 is connected to the AC input pin of the rectifier bridge. Utilizing the unidirectional conductivity of the diodes, the alternating induced current of the first coil is converted into pulsating DC. The filter network includes a large-capacity electrolytic capacitor. A large-capacity electrolytic capacitor is connected in parallel to the DC output terminal of the rectifier bridge to filter out low-frequency ripple. The large-capacity electrolytic capacitor is connected in series with a small inductor to form an LC filter with the capacitor, further suppressing high-frequency ripple.

[0199] It should be noted that by comparing the induced current of the first coil and the induced current of the second coil, the current is shunted, and the receiving coils L4 and L5 correspond to different operating modes. When V O4 >V O6 When L4 is in constant current mode, L5 is in constant voltage mode. The second and third preset rectifier and filter circuits are matched with L4 and L5 respectively. By shunting, "different coils correspond to different rectification paths", so that the system can automatically switch between constant current and constant voltage output without additional control. At the same time, it can ensure that a stable DC power can be output to charge the battery in both modes, which meets the design goal of good anti-interference capability and adaptability to different charging needs.

[0200] S38. Connect the target DC power to the battery for charging.

[0201] In this embodiment of the invention, when the target DC power is connected to the battery for charging, the output terminals of the second or third preset rectifier and filter circuit must first be connected to the positive and negative terminals of the battery via wires to ensure that the current flows into the battery in one direction to avoid reverse discharge. During the charging process, relying on the system's characteristic of achieving constant current-constant voltage charging without control, the target DC power will automatically adapt the charging mode according to the real-time status of the battery. When the battery power is low, it will be supplemented with constant current mode to ensure charging efficiency. When the battery power is close to full, it will automatically switch to constant voltage mode to avoid overcharging and damage to the battery. At the same time, the entire charging process does not require the addition of an AC switch or closed-loop control. Stable charging can be maintained solely through the system parameters designed in the early stage, ultimately providing continuous and safe power replenishment for the battery of the pole online monitoring equipment and ensuring stable operation of the equipment.

[0202] To facilitate understanding of the equivalent circuit and mode switching logic described above, a verification example is provided below to simulate the energy transfer process under constant current / constant voltage mode, providing mathematical derivation support for the entire wireless charging process and ensuring the feasibility and stability of the invention.

[0203] The DC power supply and inverter can be equivalent to an AC power supply V1, and the rectifier circuit and battery can be equivalent to an AC resistor R. ac The relationship between them is as follows:

[0204] (1)

[0205] In the formula, This represents the alternating current voltage after the DC power supply and inverter are equivalent. This represents the stable DC voltage output by rectifier and filter circuit 1. This represents the AC resistance of the rectifier circuit and the battery equivalent.

[0206] Based on the unidirectional flow characteristic of the rectifier circuit, if V O4 >V O6 If the current output mode is not active, then receiving coil L4 will operate while receiving coil L5 will not; conversely, if the current output mode is not active, then receiving coil L4 will not operate while receiving coil L5 will operate. Based on this characteristic, the equivalent circuit can be decomposed into a constant current output mode equivalent circuit and a constant voltage output mode equivalent circuit. For example... Figure 6 and Figure 7 As shown:

[0207] First, we analyze the constant current output mode. According to Kirchhoff's laws, the loop voltage equation is as follows:

[0208] (2)

[0209] In the formula, This represents the current in a branch of the equivalent circuit in constant current output mode, analyzed using Kirchhoff's laws.

[0210] To ensure the system is in a resonant state, the values ​​of the system compensation elements are:

[0211] (3)

[0212] The relationship between input voltage and output current can be calculated as follows:

[0213] (4)

[0214] The current gain G of the system can be obtained. I for:

[0215] (5)

[0216] It can be seen that the system's current gain is only related to the voltage V1 and the operating frequency. Mutual induction M 23 Mutual induction M 34 It is related to the inductor L1, and to the load R. ac Since the magnitude is independent, the system can achieve constant current output regardless of the load.

[0217] Next, the constant voltage mode is analyzed, and its loop voltage equation is written according to Kirchhoff's laws as follows:

[0218] (6)

[0219] In the formula, This represents the current in a branch of the equivalent circuit in constant current output mode, analyzed using Kirchhoff's laws.

[0220] To ensure the system is in a resonant state, the compensation element should be selected as follows:

[0221] (7)

[0222] The voltage across the AC resistor is The relationship between the input voltage and the output voltage can be calculated as follows:

[0223] (8)

[0224] The voltage gain G of the system can be obtained. V for:

[0225] (9)

[0226] It can be seen that the system's output voltage is only related to the voltage V1 and the mutual inductance M. 23 Mutual induction M 35 The voltage is related to inductors L1 and L6, but not to the load size. Therefore, the system can achieve constant voltage output regardless of the load.

[0227] The above analysis shows that with proper system parameter design, constant current-constant voltage charging can be achieved without control, and the charging current and voltage can be adjusted by modifying the system parameters. The following analysis explains how to design system parameters based on charging requirements, setting the charging current to I. charge The charging voltage is V charge The system's operating frequency is First, fabricate four transmission coils. Install the coils at appropriate positions based on the insulator length. It is recommended to install the relay coil L3 at the 1 / 2 position, but it can also be installed at any position depending on the actual environment. Measure the mutual inductance M between the coils using an instrument. 23 M 34 and M 35 The output voltage V can be obtained from the nameplate parameters of the current transformer. dc The input and output relationship of the rectifier circuit is as follows:

[0228] (10)

[0229] In the formula, This represents the input voltage of the inverter circuit, typically the rectified DC voltage, or the voltage of the equivalent AC source. This represents the output voltage of the rectifier circuit, the DC voltage used to charge the battery, or the load-side voltage. This represents the input current of the inverter circuit, corresponding to the current input to the inverter stage after rectification. This indicates the output current of the rectifier circuit, the current used to charge the battery, or the load-side current.

[0230] Based on the charging current requirement, the value of inductor L1 can be calculated using equation (5):

[0231] (11)

[0232] Based on the output voltage requirements, the value of inductor L6 is calculated as follows:

[0233] (12)

[0234] Finally, based on formulas (3) and (7), the values ​​of other compensation capacitors are calculated as follows:

[0235] (13)

[0236] This invention has the following advantages:

[0237] 1. Unlike the traditional method of energy extraction and wire transmission, the wireless power transmission technology enables contactless power transmission, and the wireless charging device proposed in this invention can reduce the impact on the insulation performance of the tower.

[0238] 2. Unlike traditional wireless charging devices, the constant current-constant voltage charging mode switching process of the charging system proposed in this invention is automatic, without the need for any AC switch or closed-loop control, and the system has good anti-interference capability.

[0239] 3. The charging current and voltage of the wireless charging device proposed in this invention can be adjusted by adjusting the parameters of the system compensation element. It has good applicability to the system coil structure or installation method. Because there are many coil installation methods for different insulator types, this invention only needs to measure the mutual inductance and then adjust the compensation element to adjust the charging current and charging voltage.

[0240] Please see Figure 8 , Figure 8 This is a structural block diagram of a topology-switching wireless charging system based on an online tower monitoring device, provided as an embodiment of the present invention.

[0241] This invention provides a topology-switching wireless charging system based on a pole / tower online monitoring device, applied to a wireless charging device. One end of the wireless charging device is connected to an energy harvesting transformer, and the other end is connected to the battery of the pole / tower online monitoring device. The system includes:

[0242] Equivalent module 801 is used to construct the equivalent circuit of a wireless charging device using the fundamental wave approximation method;

[0243] The acquisition module 802 is used to acquire target charging demand data, coil mutual inductance calibration data, and basic data of the energy harvesting transformer;

[0244] Calculation module 803 is used to calculate the circuit element update parameters of the equivalent circuit using charging demand target data, coil mutual inductance calibration data and energy harvesting transformer basic data;

[0245] Module 804 is used to update parameters using circuit elements to match corresponding circuit elements and to build a wireless charging circuit for the online monitoring device of the tower.

[0246] The charging module 805 is used to charge the battery when the wireless charging circuit receives the induced voltage obtained by the energy harvester.

[0247] Furthermore, the target charging demand data includes the target charging current, system operating frequency, and target charging voltage; the coil mutual inductance calibration data includes the mutual inductance coefficient of the energy harvesting relay, the mutual inductance coefficient of the first relay charging control, and the mutual inductance coefficient of the second relay charging control; the basic data of the energy harvesting transformer includes the rated DC voltage; and the calculation module 803 includes:

[0248] The charging current matching inductance value submodule is used to determine the charging current matching inductance value using the target charging current, system operating frequency, energy harvesting relay mutual inductance coefficient, first relay charging control mutual inductance coefficient and rated DC voltage.

[0249] The charging voltage matching inductance value submodule is used to determine the charging voltage matching inductance value using the rated DC voltage, target charging voltage, energy harvesting relay mutual inductance coefficient, second relay charging control mutual inductance coefficient, and charging current matching inductance value.

[0250] The constant current compensation capacitor submodule is used to input the preset constant current compensation capacitor equation by matching the system operating frequency and charging current with the inductance value, and then solve it by combining the preset coil reference inductance data to determine the constant current compensation capacitor.

[0251] The constant voltage compensation capacitor submodule is used to input the preset constant voltage compensation capacitor equation by matching the system operating frequency and charging voltage with the inductance value, and then solve it by combining the preset coil reference inductance data to determine the constant voltage compensation capacitor.

[0252] The updated circuit component parameters include the charging current matching inductor value, the charging voltage matching inductor value, the constant current compensation capacitor, and the constant voltage compensation capacitor.

[0253] Furthermore, the charging current matching inductance value submodule includes:

[0254] The first multiplication unit is used to perform a multiplication operation by using the mutual inductance coefficient of the energy relay and the rated DC voltage to obtain the first multiplication value;

[0255] The operating angular frequency unit is used to convert the system operating frequency into the operating angular frequency;

[0256] The second multiplication unit is used to perform multiplication operations using the operating angular frequency, the first relay charging control mutual inductance coefficient, and the target charging current to obtain the second multiplication value.

[0257] The first processing unit is used to perform a ratio calculation using the first multiplier and the second multiplier to obtain the charging current matching inductance value.

[0258] Furthermore, the charging voltage matching inductance value submodule includes:

[0259] The third multiplication unit is used to perform a multiplication operation on the target charging voltage and the charging current matching inductance value to obtain the third multiplication value.

[0260] The fourth multiplication unit is used to perform a multiplication operation by using the third multiplication value and the mutual inductance coefficient of the second relay charging control to obtain the fourth multiplication value;

[0261] The fifth multiplication unit is used to perform a multiplication operation by combining the fourth multiplication value with a preset first inductance coefficient to obtain the fifth multiplication value;

[0262] The sixth multiplication unit is used to perform a multiplication operation using the rated DC voltage and the mutual inductance coefficient of the energy harvesting relay to obtain the sixth multiplication value;

[0263] The seventh multiplication unit is used to perform a multiplication operation by multiplying the sixth multiplication value with a preset second inductance coefficient to obtain the seventh multiplication value;

[0264] The second processing unit is used to perform a ratio calculation between the fifth multiplier and the seventh multiplier to obtain the charging voltage matching inductance value.

[0265] Furthermore, module 804 includes:

[0266] The target key submodule is used to construct target keys by updating different types of parameters within the parameters using circuit elements.

[0267] The circuit element submodule is used to retrieve a preset circuit element key-value pair database using each target key and match the circuit elements corresponding to different types of parameters.

[0268] The initial coupling circuit submodule is used to update the equivalent circuit using various circuit elements and construct the initial coupling circuit.

[0269] The wireless charging circuit submodule is used to perform continuity and insulation checks on the initial coupling circuit, and to construct the wireless charging circuit for the pole online monitoring equipment based on the verified initial coupling circuit.

[0270] Furthermore, the charging module 805 includes:

[0271] The DC voltage submodule is used to rectify and filter the induced voltage obtained by the energy harvester through the first preset rectification and filtering circuit to obtain DC voltage when the wireless charging circuit receives the induced voltage;

[0272] The inverter current submodule is used to invert and convert DC voltage to inverter current;

[0273] The induced current submodule is used to perform a magnetic field coupling on the inverter current to obtain the induced current.

[0274] The secondary magnetic field coupling submodule is used to perform secondary magnetic field coupling on the induced current to obtain the induced current of the first coil and the induced current of the second coil.

[0275] The comparison submodule is used to compare the induced current of the first coil with the induced current of the second coil.

[0276] The first output submodule is used to rectify and filter the induced current of the first coil through the second preset rectifier and filter circuit to obtain the target DC current when the induced current of the first coil is greater than the induced current of the second coil.

[0277] The second output submodule is used to rectify and filter the induced current of the second coil through the third preset rectifier and filter circuit when the induced current of the first coil is less than or equal to the induced current of the second coil, so as to obtain the target DC current.

[0278] The access submodule is used to connect the target DC power to the battery for charging.

[0279] Please see Figure 9 , Figure 9 This is a structural block diagram of an electronic device provided in an embodiment of the present invention.

[0280] An electronic device according to an embodiment of the present invention includes: a memory 901 and a processor 902. The memory 901 stores a computer program. When the computer program is executed by the processor 902, the processor 902 executes the topology self-switching wireless charging method based on the pole online monitoring device as described in any of the above embodiments.

[0281] Memory 901 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Memory 901 has storage space 903 for program code 913 for performing any of the method steps described above. For example, storage space 903 for program code may include various program codes 913 for implementing the various steps in the methods described above. These program codes may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When run by a computing processing device, this code causes the computing processing device to perform the various steps in the methods described above. These program codes may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When this code is run by a computing device, it causes the computing device to perform the various steps in the topology self-switching wireless charging method based on the pole-mounted online monitoring device described above.

[0282] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the topology self-switching wireless charging method based on a pole-tower online monitoring device as described in any of the above embodiments.

[0283] This invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer performs the topology self-switching wireless charging method based on a pole-tower online monitoring device as described in any of the above embodiments.

[0284] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0285] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0286] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0287] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0288] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0289] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A topology-automatic wireless charging method based on an online tower monitoring device, characterized in that, An application in wireless charging devices, wherein one end of the wireless charging device is connected to an energy harvesting transformer and the other end is connected to the battery of a pole / tower online monitoring device, comprising: The equivalent circuit of the wireless charging device is constructed using the fundamental frequency approximation method. Acquire target data for charging demand, coil mutual inductance calibration data, and basic data for energy harvesting transformers; The circuit element update parameters of the equivalent circuit are calculated using the charging demand target data, the coil mutual inductance calibration data, and the energy harvesting transformer basic data. The circuit elements are used to update the parameters and match the corresponding circuit elements, and a wireless charging circuit for the online monitoring device of the tower is constructed. When the wireless charging circuit receives the induced voltage obtained by the energy harvesting transformer, it charges the battery.

2. The topology self-switching wireless charging method based on pole and tower online monitoring equipment according to claim 1, characterized in that, The target charging demand data includes the target charging current, system operating frequency, and target charging voltage. The coil mutual inductance calibration data includes the energy harvesting relay mutual inductance coefficient, the first relay charging control mutual inductance coefficient, and the second relay charging control mutual inductance coefficient. The basic data of the energy harvesting transformer includes the rated DC voltage. The calculation of the circuit element update parameters of the equivalent circuit using the target charging demand data, the coil mutual inductance calibration data, and the basic data of the energy harvesting transformer includes: The charging current matching inductance value is determined using the target charging current, the system operating frequency, the energy harvesting relay mutual inductance coefficient, the first relay charging control mutual inductance coefficient, and the rated DC voltage. The charging voltage matching inductance value is determined using the rated DC voltage, the target charging voltage, the energy harvesting relay mutual inductance coefficient, the second relay charging control mutual inductance coefficient, and the charging current matching inductance value. The system operating frequency and the charging current are used to match the inductance value of the preset constant current compensation capacitor equation. The equation is then solved in combination with the preset coil reference inductance data to determine the constant current compensation capacitor. The system operating frequency and the charging voltage are used to match the inductance value of the preset constant voltage compensation capacitor equation. The equation is then solved in combination with the preset coil reference inductance data to determine the constant voltage compensation capacitor. The updated parameters of the circuit components include the charging current matching inductor value, the charging voltage matching inductor value, the constant current compensation capacitor, and the constant voltage compensation capacitor.

3. The topology self-switching wireless charging method based on pole and tower online monitoring equipment according to claim 2, characterized in that, The step of determining the charging current matching inductance value using the target charging current, the system operating frequency, the energy harvesting relay mutual inductance coefficient, the first relay charging control mutual inductance coefficient, and the rated DC voltage includes: The first multiplication value is obtained by multiplying the mutual inductance coefficient of the energy relay with the rated DC voltage. Convert the system's operating frequency into its operating angular frequency; The second multiplication value is obtained by multiplying the operating angular frequency, the first relay charging control mutual inductance coefficient, and the target charging current. The charging current matching inductance value is obtained by performing a ratio calculation between the first multiplier and the second multiplier.

4. The topology self-switching wireless charging method based on pole and tower online monitoring equipment according to claim 2, characterized in that, The step of determining the charging voltage matching inductance value using the rated DC voltage, the target charging voltage, the energy harvesting relay mutual inductance coefficient, the second relay charging control mutual inductance coefficient, and the charging current matching inductance value includes: The target charging voltage and the charging current are multiplied by the matching inductance value to obtain a third multiplication value; The third multiplication value is multiplied by the second relay charging control mutual inductance coefficient to obtain the fourth multiplication value; The fifth multiplier is obtained by multiplying the fourth multiplier with the preset first inductance coefficient. The sixth multiplication value is obtained by multiplying the rated DC voltage with the mutual inductance coefficient of the energy relay. The sixth multiplier is multiplied by a preset second inductance coefficient to obtain the seventh multiplier. The charging voltage matching inductance value is obtained by performing a ratio calculation between the fifth multiplier and the seventh multiplier.

5. The topology self-switching wireless charging method based on pole and tower online monitoring equipment according to claim 1, characterized in that, The step of using the circuit element to update parameters and match corresponding circuit elements, and constructing the wireless charging circuit for the pole online monitoring device, includes: The target key is constructed by using different types of parameters within the updated parameters of the circuit element; The target keys are used to retrieve the preset circuit element key-value pair database and match the circuit elements corresponding to the different types of parameters. The equivalent circuit is updated using each of the described circuit elements to construct an initial coupled circuit; The initial coupling circuit is tested for continuity and insulation. Based on the initial coupling circuit that passes the test, the wireless charging circuit of the pole online monitoring device is constructed.

6. The topology self-switching wireless charging method based on pole and tower online monitoring equipment according to claim 1, characterized in that, The step of charging the battery when the wireless charging circuit receives the induced voltage obtained by the energy harvesting transformer includes: When the wireless charging circuit receives the induced voltage obtained by the energy transformer, it performs rectification and filtering operations on the induced voltage through the first preset rectification and filtering circuit to obtain a DC voltage. The DC voltage is inverted and converted to obtain an inverter current; The inverter current is coupled with a magnetic field to obtain an induced current. The induced current is coupled with a secondary magnetic field to obtain the induced current of the first coil and the induced current of the second coil. Compare the induced current of the first coil with the induced current of the second coil; When the induced current of the first coil is greater than the induced current of the second coil, the induced current of the first coil is rectified and filtered by the second preset rectifier and filter circuit to obtain the target DC current. When the induced current of the first coil is less than or equal to the induced current of the second coil, the induced current of the second coil is rectified and filtered by the third preset rectifier and filter circuit to obtain the target DC current. The target DC power is connected to the battery for charging.

7. A topology-switching wireless charging system based on pole and tower online monitoring equipment, characterized in that, An application in wireless charging devices, wherein one end of the wireless charging device is connected to an energy harvesting transformer and the other end is connected to the battery of a pole / tower online monitoring device, comprising: Equivalent module, used to construct the equivalent circuit of the wireless charging device using the fundamental wave approximation method; The acquisition module is used to acquire target data of charging demand, coil mutual inductance calibration data and basic data of energy harvesting transformer; The calculation module is used to calculate the updated circuit element parameters of the equivalent circuit using the charging demand target data, the coil mutual inductance calibration data, and the energy harvesting transformer basic data; A construction module is used to update the parameters of the circuit elements to match the corresponding circuit elements and construct the wireless charging circuit of the pole online monitoring device; The charging module is used to charge the battery when the wireless charging circuit receives the induced voltage obtained by the energy harvesting transformer.

8. An electronic device, characterized in that, The device includes a memory and a processor. The memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of the topology self-switching wireless charging method based on a pole-tower online monitoring device as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the topology self-switching wireless charging method based on the online monitoring device for poles and towers as described in any one of claims 1-6.

10. A computer program product, characterized in that, The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, wherein when the program instructions are executed by a computer, the computer performs the topology self-switching wireless charging method based on a pole online monitoring device as described in any one of claims 1-6.

Images