A wireless power supply system and method based on induction coil angle power regulation

Abstract

A wireless power supply system and method for adjusting power based on the angle of an induction coil, characterized in that: the system includes an induction energy acquisition device, a lightning protection device, a wireless power supply transmitting device, a relay device, a wireless power supply receiving device and an online monitoring unit; wherein the induction energy acquisition device is connected to the wireless power supply transmitting device through the lightning protection device, wherein the wireless power supply transmitting device includes a transmitting coil; the wireless power supply receiving device is connected to the online monitoring unit, wherein the wireless power supply receiving device includes a receiving coil; and the transmitting coil and the receiving coil are perpendicular to each other, and are respectively at a set angle with the relay coil in the relay device. The method of the present invention is simple, easy to adjust, and can be effectively combined with lightning protection equipment, etc., which greatly improves the popularity of wireless power transmission technology.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage monitoring equipment, and more specifically, to a wireless power supply system and method for adjusting power based on an induction coil angle. Background Art

[0002] With the continuous development of the power industry, the voltage level of transmission lines has gradually increased, and building a strong high-voltage transmission network has become an important goal of the power industry. In order to ensure that high-voltage transmission lines are always in good operating condition, monitoring equipment such as line sway and wind deviation monitoring, ice monitoring, lightning monitoring and tower tilt monitoring have been increasingly widely used, ensuring the real-time and stable operation of high-voltage transmission lines.

[0003] At present, the power supply methods for online monitoring equipment based on high-voltage transmission lines mainly include DC battery power supply, solar power supply and wind power supply. However, the above traditional power supply methods are easily affected by the environment and have problems such as insufficient lifespan. High-voltage monitoring equipment usually requires more than five years of continuous working time, and traditional power supply methods are difficult to meet the working needs of the equipment.

[0004] Wireless power transmission technology uses a non-contact energy transmission method, which not only avoids the safety problems caused by frequent line connections, but also has high flexibility, becoming one of the hot topics in the current energy supply field. Currently, wireless power transmission technology is applied to the power supply of online monitoring equipment for high-voltage transmission lines, which can ensure that the equipment can work for a long time and is not easily affected by environmental interference.

[0005] However, in the high-voltage transmission lines that provide the power supply basis for wireless power transmission technology, there are still problems such as insulation property interference, difficulty in controlling charging power, difficulty in effectively matching charging power with various electrical equipment, and severe lightning surges.

[0006] In view of the above problems, a wireless power supply method and system are urgently needed. Summary of the invention

[0007] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a wireless power supply method and system based on power adjustment by the induction coil angle, by setting a transmitting coil, a relay coil and a receiving coil, and by adjusting the angle between the coils, the charging power of the electrical equipment can be effectively adjusted.

[0008] The present invention adopts the following technical solution.

[0009] The first aspect of the present invention relates to a wireless power supply system for adjusting power based on the angle of an induction coil, wherein the system includes an induction energy acquisition device 1, a lightning protection device 5, a wireless power supply transmitting device 2, a relay device 3, a wireless power supply receiving device 4 and an online monitoring unit 6; wherein the induction energy acquisition device 1 is connected to the wireless power supply transmitting device 2 through the lightning protection device 5, wherein the wireless power supply transmitting device 2 includes a transmitting coil 7; the wireless power supply receiving device 4 is connected to the online monitoring unit 6, wherein the wireless power supply receiving device 4 includes a receiving coil 8; and the transmitting coil 7 and the receiving coil 8 are perpendicular to each other, and are respectively at a set angle to the relay coil 9 in the relay device 3.

[0010] Preferably, the wireless power transmitting device 2 includes a high-frequency inverter circuit 10 and a transmitting coil 7, and the transmitting coil 7 is perpendicular to the high-voltage transmission line; the wireless power transmitting device 2 is vertically suspended on the high-voltage transmission line through an insulated firmware.

[0011] Preferably, the high-frequency inverter circuit 10 is a voltage-type full-bridge inverter circuit, which respectively includes first to fourth switching tubes and first to fourth diodes; wherein the switching tubes are made of silicon carbide MOSFET tubes, and the diodes are power diodes; compensation resistors R, compensation capacitors C, and compensation inductors L are connected in sequence between the first and third switching tubes and the second and fourth switching tubes; wherein the compensation capacitor C is a power capacitor, and the compensation inductor L is a Litz wire inductor.

[0012] Preferably, the lightning protection device 5 includes a ceramic gas discharge tube, a varistor R1, an inductor L1, a first diode D1, a MOS tube Q1, resistors R2, R3 and R4, capacitors C1 and C2, and a second diode D2; wherein, the two ends of the ceramic gas discharge tube are respectively connected to the branch composed of the varistor R1 and the inductor L1, and are connected to the two ends of the first diode D1, one end of the diode D1 is connected to the drain of the MOS tube Q1, and its source is respectively connected to the resistor R3, the negative electrode of the second diode D2, the first capacitor C1, and one end of the second capacitor C2, and its gate is respectively connected to the other end of the resistor R3, the positive electrode of the second diode D2, and the other end of the second capacitor C2, and is connected to one end of the resistor R4; the other end of the resistor R4 is grounded, and the other end of the first capacitor C1 is connected to the drain of the MOS tube Q1 through the resistor R2.

[0013] Preferably, the wireless power receiving device 4 includes a rectifying and voltage-stabilizing circuit 11 and a receiving coil 8, and the transmitting coil 8 is parallel to the high-voltage transmission line; the wireless power receiving device 4 is horizontally fixed on a high-voltage pole tower.

[0014] Preferably, the relay coil 9 is located between the transmitting coil 7 and the receiving coil 8, and the angle between the relay coil 9 and the transmitting coil 7 and the receiving coil 8 is adjustable.

[0015] Preferably, the inductances of the transmitting coil 7, the relay coil 9, and the receiving coil 8 are L P , L R and L S , the resonant capacitors are C P , C R and C S , then L P ·C P =L R ·C R =L S ·C S .

[0016] Preferably, the transmission efficiency of the transmitting coil 7, the relay coil 9, and the receiving coil 8 is

[0017]

[0018] Wherein, ω is the operating frequency of the system, which is generated by the resonance of the coil inductance and the resonant capacitor, M1(θ) is the mutual inductance between the transmitting coil 7 and the relay coil 9, where θ is the angle between the relay coil 9 and the receiving coil 8, and 0°<θ<90°, M2(θ) is the mutual inductance between the relay coil 9 and the receiving coil 8, R P , R R With R S are the parasitic resistances of the transmitting coil (7), the relay coil (9), and the receiving coil (8). L It is the equivalent load connected to the receiving coil (8).

[0019] Preferably, the transmission efficiency of the transmitting coil 7 , the relay coil 9 , and the receiving coil 8 varies with the change of the angle between the relay coil 9 and the receiving coil 8 .

[0020] The second aspect of the present invention relates to a wireless power supply method based on induction coil angle power regulation, wherein the method is implemented by a wireless power supply system based on induction coil angle power regulation as described in the first aspect of the present invention; wherein the transmitting coil 7 and the receiving coil 8 are respectively arranged vertically and parallel to the high-voltage transmission line, and the angle between the relay coil 9 and the receiving coil 8 is adjusted so that the rectifying and voltage-stabilizing circuit 11 outputs a DC voltage that meets the requirements of the online monitoring unit 6 in real time.

[0021] The beneficial effect of the present invention is that, compared with the prior art, the wireless power supply method and system based on power adjustment by induction coil angle in the present invention can effectively adjust the charging power of the electrical equipment by setting a transmitting coil, a relay coil and a receiving coil, and adjusting the angle between the coils, so that the wireless power transmission technology can be effectively applied to various electrical equipment. The method of the present invention is simple, easy to adjust, and can be effectively combined with lightning protection equipment, greatly improving the popularity of wireless power transmission technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of an installation method of a wireless power supply system based on induction coil angle power adjustment according to the present invention;

[0023] Figure 2 A functional structure diagram of a wireless power supply system for adjusting power based on an induction coil angle according to the present invention;

[0024] Figure 3 A schematic diagram of the circuit structure of a lightning protection device in a wireless power supply system based on power adjustment by an induction coil angle according to the present invention;

[0025] Figure 4 It is a structural schematic diagram of a high-frequency inverter circuit in a wireless power supply system based on power adjustment by an induction coil angle according to the present invention;

[0026] Figure 5 A schematic diagram of the circuit structure of a transfer coil in a wireless power supply system for adjusting power based on an induction coil angle according to the present invention;

[0027] Figure 6 The present invention is a schematic diagram of a circuit structure of rectification and voltage stabilization in a wireless power supply system based on power adjustment by an induction coil angle. DETAILED DESCRIPTION

[0028] The present application is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present application.

[0029] Figure 1 The figure is a schematic diagram of the installation method of a wireless power supply system based on the angle adjustment of the induction coil according to the present invention. Figure 1As shown, the first aspect of the present invention relates to a wireless power supply system for adjusting power based on an induction coil angle, wherein the system includes an induction energy acquisition device 1, a lightning protection device 5, a wireless power supply transmitting device 2, a relay device 3, a wireless power supply receiving device 4 and an online monitoring unit 6; wherein the induction energy acquisition device 1 is connected to the wireless power supply transmitting device 2 through the lightning protection device 5, wherein the wireless power supply transmitting device 2 includes a transmitting coil 7; the wireless power supply receiving device 4 is connected to the online monitoring unit 6, wherein the wireless power supply receiving device 4 includes a receiving coil 8; and the transmitting coil 7 and the receiving coil 8 are perpendicular to each other, and are respectively at a set angle to the relay coil 9 in the relay device 3.

[0030] It is understandable that the inductive energy harvesting device 1 in the present invention can harvest energy based on the electric energy flowing through the inductive transmission line. Generally speaking, the inductive energy harvesting device 1 can be nested in the transmission line, and includes a magnetic ring and a conductor. In one embodiment of the present invention, the magnetic ring is made of an iron-nickel-molybdenum magnetic powder core material, and is nested in the transmission line to harvest energy. The harvested energy is connected to the lightning protection device 5 through the conductor and output is realized.

[0031] Figure 2 FIG. 1 is a functional structure diagram of a wireless power supply system for adjusting power based on the angle of an induction coil according to the present invention. Figure 2 As shown, the inductive energy harvesting device 1 in the present invention is connected to the high-frequency inverter circuit part in the wireless power supply transmitting device 2 through the lightning protection device 5, and the transmitting coil 7 in the wireless power supply transmitting device 2 is mutually inductive with the relay coil 9 in the relay device 3 and the receiving coil 8 in the wireless power supply receiving device 4, and the receiving and regulating of electric energy is realized through the rectifying and voltage stabilizing circuit 11, and the regulated electric energy is transmitted to the online monitoring unit 6 for real-time use by the online monitoring device.

[0032] Since the energy acquisition device in the present invention can obtain electric energy through the high-voltage line that is always in operation, there is no situation where the battery and other electric energy are consumed. As long as the system is set up, it can be used all the time without power outages, which effectively improves the energy supply safety of the online monitoring equipment. At the same time, since the energy acquisition device collects the electric energy of the industrial frequency alternating current in the high-voltage transmission line through the principle of mutual induction, no additional power supply equipment is required, and this method also saves electric energy.

[0033] In one embodiment of the present invention, the energy harvesting device 1 may first pass through a rectifying and voltage stabilizing circuit before entering the lightning protection device 5. The rectifying and voltage stabilizing circuit may regulate the acquired industrial frequency alternating current into 48V direct current. The 48V direct current is output after passing through the protection circuit.

[0034] Figure 3The figure is a schematic diagram of the circuit structure of a lightning protection device in a wireless power supply system based on power adjustment by an induction coil angle according to the present invention. Figure 3 As shown, the lightning protection device 5 in the present invention can control the 48V DC output by the rectifier and voltage stabilizing circuit. Since the transmission line may be affected by natural weather such as lightning strikes, and output DC with a voltage higher than 48V in an instant, the lightning protection device 5 added in the present invention can control the voltage output to the transmitting coil to be sufficiently safe. The output gain of the circuit in the protection device 5 is 1 under normal working conditions. At this time, after the 48V DC outputs the protection device, the output is still 48V. When an instantaneous high voltage caused by lightning strikes or other effects appears in the circuit, the device can limit the output voltage to less than 48V.

[0035] Preferably, the lightning protection device 5 includes a ceramic gas discharge tube, a varistor R1, an inductor L1, a first diode D1, a MOS tube Q1, resistors R2, R3 and R4, capacitors C1 and C2, and a second diode D2; wherein, the two ends of the ceramic gas discharge tube are respectively connected to the branch composed of the varistor R1 and the inductor L1, and are connected to the two ends of the first diode D1, one end of the diode D1 is connected to the drain of the MOS tube Q1, and its source is respectively connected to the resistor R3, the negative electrode of the second diode D2, the first capacitor C1, and one end of the second capacitor C2, and its gate is respectively connected to the other end of the resistor R3, the positive electrode of the second diode D2, and the other end of the second capacitor C2, and is connected to one end of the resistor R4; the other end of the resistor R4 is grounded, and the other end of the first capacitor C1 is connected to the drain of the MOS tube Q1 through the resistor R2.

[0036] It can be understood that the resistor R1 in the present invention is a varistor, and its resistance value also increases when the voltage increases instantaneously. In addition, the first and second diodes are TVS (transient voltage suppressor) diodes, which can quickly reduce their impedance when the transient voltage passes. In the present invention, since a ceramic gas discharge tube is also connected in parallel at both ends of the first diode D1, the diode can absorb transient current, thereby clamping the voltage at both ends of the diode at a lower voltage value, protecting the source of the subsequent circuit from being impacted by transient high-voltage spike pulses.

[0037] When a lightning surge occurs in the circuit, a large amount of electrical energy is absorbed by the parallel branch composed of the ceramic gas discharge tube, the varistor and the first diode D1, and a smaller voltage is input to the Q1 tube. The Q1 tube is subjected to the voltage division effect of the resistors R3 and R4, providing a stable gate voltage, so that its source-drain current remains relatively stable. In this process, the capacitor C1 and the resistor R2 further stabilize the surge voltage, while the capacitor C2 and the second diode D2 stabilize the voltage across R3, that is, the voltage at the gate of the Q1 tube. Therefore, Figure 3 The voltage output on the right side is sufficiently stable. The lightning protection device 5 in the present invention can fully and safely prevent voltage surges and provide a DC voltage limited to 48V for the subsequent circuit.

[0038] Preferably, the wireless power transmitting device 2 includes a high-frequency inverter circuit 10 and a transmitting coil 7, and the transmitting coil 7 is perpendicular to the high-voltage transmission line; the wireless power transmitting device 2 is vertically suspended on the high-voltage transmission line through an insulated firmware.

[0039] The wireless power transmission device 2 in the present invention can convert 48V direct current into high-frequency alternating current again, so that the transmitting coil can have mutual induction with other coils. In one embodiment of the present invention, the high-frequency alternating current has a frequency between 35kHz and 120kHz.

[0040] Figure 4 FIG. 1 is a schematic diagram of a high-frequency inverter circuit in a wireless power supply system based on induction coil angle power regulation according to the present invention. Figure 4 As shown, in the present invention, the high-frequency inverter circuit 10 is a voltage-type full-bridge inverter circuit, which includes first to fourth switch tubes and first to fourth diodes respectively; wherein the switch tubes are made of silicon carbide MOSFET tubes, and the diodes are power diodes; compensation resistors R, compensation capacitors C, and compensation inductors L are connected in sequence between the first and third switch tubes and the second and fourth switch tubes; wherein the compensation capacitor C is a power capacitor, and the compensation inductor L is a Litz wire inductor.

[0041] The high-frequency inverter circuit in the present invention adopts a voltage-type full-bridge inverter circuit, which can realize the conversion of direct current to alternating current through the action of switching tubes and diodes.

[0042] In addition, in the present invention, the transmitting coil can be arranged perpendicular to the high-voltage transmission line, thereby achieving a set angle with the receiving coil.

[0043] Preferably, the relay coil 9 is located between the transmitting coil 7 and the receiving coil 8, and the angle between the relay coil 9 and the transmitting coil 7 and the receiving coil 8 is adjustable.

[0044] In addition, the relay coil in the present invention can be set as a structure that can rotate at a certain angle. The relay device 3 may include an insulating support fixture, a drive motor, a relay coil 9 and a compensation capacitor. By driving the drive motor, the relay coil can change the angle, thereby realizing rotation. In addition, the insulating support fixture can fix the relay coil between the transmitting coil 7 and the receiving coil 8.

[0045] Preferably, the wireless power receiving device 4 includes a rectifying and voltage-stabilizing circuit 11 and a receiving coil 8, and the transmitting coil 8 is parallel to the high-voltage transmission line; the wireless power receiving device 4 is horizontally fixed on a high-voltage pole tower.

[0046] The wireless receiving device in the present invention can be set horizontally with the high-voltage transmission line to avoid being affected by the high-frequency alternating current in the high-voltage transmission line to the greatest extent, so that the mutual inductance it receives comes entirely from the transmitting coil 7. After receiving the alternating current, the receiving coil outputs it to the rectifying and voltage-stabilizing circuit 11. In one embodiment of the present invention, the circuit can convert the high-frequency alternating current into 12V direct current, which can meet the power supply requirements of the online monitoring equipment at the load end.

[0047] Figure 6 The schematic diagram of the circuit structure of the rectification and voltage stabilization in a wireless power supply system based on the induction coil angle power regulation of the present invention. Specifically, the rectification and voltage stabilization circuit 11 can be a bridge rectifier circuit. In one embodiment of the present invention, the circuit includes diodes D1 to D4, D1 and D3 are connected in series, D2 and D4 are connected in series, and the two series branches are connected in parallel to the capacitor C L and resistor R L At the same time, the capacitor, resistor and inductor of the transmitting coil are connected in series between the connection points of D1 and D3 and between the connection points of D2 and D4 in the two series branches.

[0048] Figure 5 FIG. 1 is a schematic diagram of the circuit structure of a transmission coil in a wireless power supply system for adjusting power based on an induction coil angle according to the present invention. Figure 5 As shown, the inductances of the transmitting coil 7, the relay coil 9, and the receiving coil 8 are L P , L R and L S , the resonant capacitors are C P , C R and C S , then L P ·C P =L R ·C R =L S ·C S . And because the oscillation of LC generates the operating frequency ω of the system, we have ω 2 L P C P =ω 2 L R C R =ω 2 L S C S =1.

[0049] In the present invention, in order to ensure that the operating frequency of the circuit where each coil is located does not change, it is necessary to reasonably configure the inductance value of the inductor coil and the size of the capacitor connected in series with the coil.P ·C P =L R ·C R =L S ·C S , so that the transmitting coil, the relay coil and the receiving coil can all realize the generation of mutual inductance alternating current at a fixed alternating current frequency. Since the inductance values ​​of the transmitting coil, the relay coil and the receiving coil are preset in the present invention, the power transmission with constant frequency can be realized by adjusting the size of the capacitor.

[0050] In the present invention, in order to enable the circuit to eventually output a direct current exactly equal to 12V, it is necessary to adjust the angle between the relay coil and the other two coils.

[0051] Preferably, the transmission efficiency of the transmitting coil 7, the relay coil 9, and the receiving coil 8 is

[0052]

[0053] Where ω is the operating frequency of the system, M1(θ) is the mutual inductance between the transmitting coil 7 and the relay coil 9, where θ is the angle between the relay coil 9 and the receiving coil 8, and 0°<θ<90°, M2(θ) is the mutual inductance between the relay coil 9 and the receiving coil 8, and R P , R R With R S They are the parasitic resistance of the transmitting coil, the parasitic resistance of the rotating relay coil and the parasitic resistance of the receiving coil, R L It is the equivalent load connected to the receiving coil (8).

[0054] The transmission efficiency described in the present invention refers to the efficiency of the output voltage and power. For example, when the voltage peak of the output AC power on the receiving coil is at U S When the equivalent load connected to the coil is R L , flows through coil L P , L R With L S The currents are I P ,I R with I S When , according to KVL (Kirchhoff Voltage Law), KVL equations are established for the meshes where the transmitting coil, relay coil, and receiving coil are located, and we can have:

[0055]

[0056] Among them, the mesh where the relay coil and the receiving coil are located will not receive the effect of external voltage, while the transmitting coil needs to be connected to the AC voltage U S.

[0057] Since the values ​​of the resonant capacitance and resonant inductance of each coil are related to the operating frequency of the system, the above formula can be simplified to

[0058]

[0059] From this we can get

[0060]

[0061] Solving the KVL equation, we get:

[0062] Then, the power P at the receiving end of the receiving coil in the present invention is obtained: out for:

[0063]

[0064] It can be seen that the total transmission efficiency of the three coils in the present invention is

[0065]

[0066] Preferably, the transmission efficiency of the transmitting coil 7 , the relay coil 9 , and the receiving coil 8 varies with the change of the angle between the relay coil 9 and the receiving coil 8 .

[0067] It is understandable that when the device of the present invention is determined, only when the angle θ between the relay coil 9 and the receiving coil 8 changes, the mutual inductances M1(θ) and M2(θ) will change with the change of the angle. For example, when the angle increases, the mutual inductance M1(θ) will be positively correlated with the magnitude of Cosθ, while the mutual inductance M2(θ) will be positively correlated with the magnitude of Sinθ. P , R R With R S , C P , C R and C S As the coefficient size is different, the power transmission efficiency will change with the change of the angle, thereby ensuring that during the rotation of the relay coil, the charging demand of the online device and the current remaining power of the lithium battery in the online monitoring device are monitored in real time, and the θ value of the rotating relay coil is automatically adjusted through the rotating motor to dynamically adjust the power, thereby ensuring the service life of the online device and the lithium battery.

[0068] It should be noted that, in one embodiment of the present invention, the load end may be connected to a battery while being connected to the high-voltage power transmission online monitoring device, so that the battery provides power to the device.

[0069] The second aspect of the present invention relates to a wireless power supply method based on power regulation by an induction coil angle, which is implemented by a wireless power supply system based on power regulation by an induction coil angle as in the first aspect of the present invention; wherein the transmitting coil 7 and the receiving coil 8 are respectively arranged vertically and parallel to the high-voltage transmission line, and the angle between the relay coil 9 and the receiving coil 8 is adjusted so that the rectifying and voltage-stabilizing circuit 11 outputs a DC voltage that meets the requirements of the online monitoring unit 6 in real time.

[0070] In the method of the present invention, the angle of the induction coil can be adjusted once at a preset time interval according to the remaining power of the lithium-ion battery, so that the circuit can provide sufficient and appropriate power for the online monitoring unit during long-term use.

[0071] The beneficial effect of the present invention is that, compared with the prior art, the wireless power supply method and system based on power adjustment by induction coil angle in the present invention can effectively adjust the charging power of the electrical equipment by setting a transmitting coil, a relay coil and a receiving coil, and adjusting the angle between the coils, so that the wireless power transmission technology can be effectively applied to various electrical equipment. The method of the present invention is simple, easy to adjust, and can be effectively combined with lightning protection equipment, greatly improving the popularity of wireless power transmission technology.

[0072] The applicant of the present invention has made a detailed explanation and description of the implementation examples of the present invention in conjunction with the drawings in the specification. However, those skilled in the art should understand that the above implementation examples are only preferred implementation schemes of the present invention, and the detailed description is only to help readers better understand the spirit of the present invention, but not to limit the scope of protection of the present invention. On the contrary, any improvements or modifications based on the inventive spirit of the present invention should fall within the scope of protection of the present invention.

Claims

1. A wireless power supply system based on induction coil angle power regulation, characterized in that: The system comprises an inductive energy extraction device (1), a lightning protection device (5), a wireless power transmission device (2), a relay device (3), a wireless power receiving device (4) and an online monitoring unit (6); wherein: The inductive energy extraction device (1) is connected to the wireless power supply transmitting device (2) via a lightning protection device (5), wherein the wireless power supply transmitting device (2) includes a transmitting coil (7); The wireless power receiving device (4) is connected to an online monitoring unit (6), wherein the wireless power receiving device (4) comprises a receiving coil (8); Furthermore, the transmitting coil (7) and the receiving coil (8) are perpendicular to each other and are respectively at a set angle with the relay coil (9) in the relay device (3); The lightning protection device (5) comprises a ceramic gas discharge tube, a varistor R1, an inductor L1, a first diode D1, a MOS tube Q1, resistors R2, R3 and R4, capacitors C1 and C2, and a second diode D2; The two ends of the ceramic gas discharge tube are respectively connected to a branch consisting of a varistor R1 and an inductor L1, and are connected to the two ends of the first diode D1. One end of the diode D1 is connected to the drain of the MOS tube Q1, and its source is respectively connected to the resistor R3, the cathode of the second diode D2, the first capacitor C1, and one end of the second capacitor C2, and its gate is respectively connected to the other end of the resistor R3, the anode of the second diode D2, and the other end of the second capacitor C2, and is connected to one end of the resistor R4; The other end of the resistor R4 is grounded, and the other end of the first capacitor C1 is connected to the drain of the MOS tube Q1 through the resistor R2; The transmission efficiency of the transmitting coil (7), the relay coil (9) and the receiving coil (8) is Wherein, ω is the operating frequency of the system, which is generated by the resonance of the inductance of the coil and the resonant capacitor, M1(θ) is the mutual inductance between the transmitting coil (7) and the relay coil (9), wherein θ is the angle between the relay coil (9) and the receiving coil (8), and 0°<θ<90°, M2(θ) is the mutual inductance between the relay coil (9) and the receiving coil (8), R p , R R With R S are the parasitic resistances of the transmitting coil (7), the relay coil (9), and the receiving coil (8), respectively, R L It is an equivalent load connected to the receiving coil (8).

2. A wireless power supply system based on induction coil angle power adjustment according to claim 1, characterized in that: The wireless power transmission device (2) comprises a high-frequency inverter circuit (10) and a transmitting coil (7), wherein the transmitting coil (7) is perpendicular to the high-voltage power transmission line; The wireless power supply transmitting device (2) is vertically suspended on the high-voltage transmission line through an insulating fixture.

3. A wireless power supply system based on induction coil angle power adjustment according to claim 2, characterized in that: The high-frequency inverter circuit (10) is a voltage-type full-bridge inverter circuit, comprising first to fourth switch tubes and first to fourth diodes respectively; Among them, the switch tube is made of silicon carbide MOSFET tube, and the diode is a power diode; A compensation resistor R, a compensation capacitor C, and a compensation inductor L are connected in sequence between the first and third switch tubes and the second and fourth switch tubes; The compensation capacitor C is a power capacitor, and the compensation inductor L is a Litz wire inductor.

4. A wireless power supply system based on induction coil angle power regulation according to claim 3, characterized in that: The wireless power supply receiving device (4) comprises a rectifying and voltage-stabilizing circuit (11) and a receiving coil (8), and the transmitting coil (7) is parallel to the high-voltage power transmission line; The wireless power supply receiving device (4) is horizontally fixed on the high-voltage pole tower.

5. A wireless power supply system based on induction coil angle power regulation according to claim 4, characterized in that: The relay coil (9) is located between the transmitting coil (7) and the receiving coil (8), and the angle between the relay coil (9) and the transmitting coil (7) and the receiving coil (8) is adjustable.

6. A wireless power supply system based on induction coil angle power regulation according to claim 5, characterized in that: The inductances of the transmitting coil (7), the relay coil (9) and the receiving coil (8) are L respectively. P , L R and L S , the resonant capacitors are C P , C R and C S , then L P ·C P =L R ·C R =L S ·C S .

7. A wireless power supply system based on induction coil angle power regulation according to claim 6, characterized in that: The transmission efficiency of the transmitting coil (7), the relay coil (9) and the receiving coil (8) varies with the change of the angle between the relay coil (9) and the receiving coil (8).

8. A wireless power supply method based on induction coil angle power regulation, characterized in that: The method is implemented by using a wireless power supply system based on induction coil angle power regulation as described in any one of claims 1 to 7; The transmitting coil (7) and the receiving coil (8) are respectively arranged vertically and parallel to the high-voltage transmission line. The angle between the relay coil (9) and the receiving coil (8) is adjusted so that the rectifying and voltage-stabilizing circuit (11) outputs a direct current voltage in real time that meets the requirements of the online monitoring unit (6).

Images