Wireless power supply device and power supply system

Abstract

The utility model relates to a wireless power supply device and a power supply system, the wireless power supply device comprises a vacuum container and a power supply assembly, the vacuum container defines a vacuum cavity, the power supply assembly is at least partially arranged in the vacuum cavity, and the power supply assembly comprises a sending module and a receiving module; the transmitting module is connected with a power grid and converts electric energy provided by the power grid into microwaves for transmission. The receiving module is used for receiving the microwaves and converting the microwaves into electric energy again to be transmitted to electric equipment. According to the wireless power supply device and the power supply system, the electric energy can be wirelessly transmitted to the electric equipment from the power grid through microwaves, a guide plate is replaced, the cost is reduced, and the transmission reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of water electrolysis, and in particular to a wireless power supply device and a power supply system. Background Art

[0002] In recent years, as the cost of renewable energy has gradually decreased, the demand for hydrogen production from renewable energy has increased significantly. Electrolysis devices are core equipment for converting electricity into hydrogen and oxygen and are being used more and more widely.

[0003] When the electric energy provided by the grid is transmitted to the electrolysis device, the existing power supply device often transmits a large current through a guide plate to achieve the transmission of electric energy, given the large power consumption of the electrolysis device for hydrogen production. However, due to the long transmission path, the consumption of the guide plate is huge, and there are certain safety hazards during use. Utility Model Content

[0004] The present application provides a wireless power supply device and a power supply system, which can wirelessly transmit electric energy from a power grid to power-consuming equipment through microwaves, replacing a guide plate, reducing costs and improving transmission reliability.

[0005] On the one hand, according to an embodiment of the present application, a wireless power supply device is proposed for use in a power grid, including: a vacuum container, which encloses a vacuum cavity; a power supply component, which is at least partially disposed in the vacuum cavity, and the power supply component includes a sending module and a receiving module. The sending module is connected to the power grid and converts the electric energy provided by the power grid into microwaves for transmission, and the receiving module is used to receive microwaves and convert the microwaves into electric energy again for transmission to power-consuming equipment.

[0006] According to one aspect of an embodiment of the present application, the sending module includes a high-frequency conversion component and a microwave generator, the input end of the high-frequency conversion component is connected to the power grid and is used to convert the electric energy provided by the power grid into high-frequency alternating current of a predetermined frequency, and the output end of the high-frequency conversion component is connected to the microwave generator; the receiving module includes a microwave receiver for receiving microwaves, and the microwave generator and the microwave receiver are arranged in a vacuum cavity.

[0007] According to one aspect of an embodiment of the present application, a high-frequency conversion component includes a first rectifier and filter circuit, a high-frequency inverter circuit, and a first control circuit electrically connected in sequence; the first rectifier and filter circuit is used to convert the electric energy provided by the power grid into direct current, the high-frequency inverter circuit converts the direct current into high-frequency alternating current, and the first control circuit controls the high-frequency alternating current to be transmitted to the microwave generator at a predetermined frequency.

[0008] According to one aspect of an embodiment of the present application, the receiving module further includes a rectifying component, an input end of the rectifying component is connected to the microwave receiver, and an output end of the rectifying component is connected to the electrical device.

[0009] According to one aspect of an embodiment of the present application, the rectifier component includes a second rectifier and filter circuit and a second control circuit electrically connected in sequence; the second rectifier and filter circuit is used to convert microwaves received by the microwave receiver into direct current, and the second control circuit controls the direct current to be transmitted to the electrical equipment at a predetermined voltage.

[0010] According to one aspect of an embodiment of the present application, at least one of the sending module and the receiving module further includes a compensation circuit, and the compensation circuit is used to generate a compensation component to adjust the voltage of the electric energy.

[0011] According to one aspect of an embodiment of the present application, a microwave generator includes a primary magnetic core and a primary winding wound on the primary magnetic core, a microwave receiver includes a secondary magnetic core and a secondary winding wound on the secondary magnetic core, the primary magnetic core and the secondary magnetic core are arranged at intervals, and the microwave generator and the microwave receiver are combined to form a transformer.

[0012] According to one aspect of an embodiment of the present application, the wireless power supply device also includes a transformer, one end of the transformer is connected to the power grid, and the other end is connected to the sending module.

[0013] According to one aspect of the embodiment of the present application, the vacuum degree in the vacuum chamber is less than or equal to 0.05 MPa.

[0014] On the other hand, according to an embodiment of the present application, a power supply system is proposed, including a wind turbine generator set and a wireless power supply device as in the above implementation, wherein a sending module of the wireless power supply device is connected to a power grid of the wind turbine generator set.

[0015] The wireless power supply device provided in the embodiment of the present application can convert the electric energy output by the power grid into microwaves by setting a sending module and a receiving module, and use microwaves to transmit in a vacuum cavity to achieve power transmission. On the one hand, it can replace the existing guide plate by wireless transmission, save materials, reduce costs, and solve the safety problems caused by oxidation deformation of the guide plate, and has higher reliability. On the other hand, by transmitting microwaves in a vacuum cavity, the power loss in the transmission process is reduced, and the residual energy that can be obtained by the electrical equipment is increased, which has a better power supply effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of a wireless power supply device provided by an embodiment of the present application;

[0018] Figure 2 It is a structural schematic diagram of a wireless power supply device provided in another embodiment of the present application.

[0019] In the attached figure:

[0020] 10-power grid; 20-transmitting module; 30-receiving module; 40-electrical equipment; 50-transformer;

[0021] 21-high frequency conversion component; 211-first rectifier filter circuit; 212-high frequency inverter circuit; 213-first control circuit; 22-microwave generator; 221-primary winding;

[0022] 31 - microwave receiver; 311 - secondary winding; 32 - rectifier component; 321 - second rectifier filter circuit; 322 - second control circuit.

[0023] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0024] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0025] The directional words appearing in the following description are all directions shown in the figures, and do not limit the wireless power supply device and power supply system of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0026] In recent years, as the cost of renewable energy has gradually decreased, the demand for hydrogen production from renewable energy has increased significantly. Taking hydrogen production from wind turbines as an example, after converting wind energy into electrical energy, it uses the power grid 10 to transmit the electrical energy to the electrolysis device, which converts the electrical energy into hydrogen and oxygen to realize the utilization of renewable energy.

[0027] The power grid is a complex system composed of power sources, transmission lines, substations and distribution lines, etc., for transmitting, distributing and controlling electric energy. Since the power grid outputs industrial frequency mains electricity, in the process of using the power grid to supply power to the electrolysis device, it is necessary to pass through a transformer and a rectifier in turn to transform and rectify the current before it can be output to the electrolysis device. In view of the large power consumption of the electrolysis device for hydrogen production, a large current needs to be transmitted from the transformer to the rectifier. Therefore, in the existing power supply device, a guide plate is generally used for power supply to transmit a large current through the guide plate.

[0028] However, due to the spacing requirements of chemical companies, the distance from the transformer to the rectifier is generally more than 5 meters. The above-mentioned use of guide plates will result in huge consumption of guide plates. For example, for an electrolysis device with a hydrogen production capacity of 1,000 standard cubic meters, the guide plate between the transformer and the rectifier requires more than 450 kilograms, which greatly increases the power supply cost.

[0029] In addition, since wind power generation is affected by factors such as wind direction and wind speed, the current will change continuously, causing the surface of the guide plate and the contact parts to continue to heat up and cool down, which can easily cause oxidation, as well as surface unevenness caused by current impact, leading to increased resistance. Since the function of the guide plate is to transmit current, once the resistance increases, it will cause a significant increase in electrolysis energy consumption. At the same time, wind power generation may also have power on and off situations. Each time the current is turned on and off, sparks will be generated at the connection of the guide plate, causing safety hazards.

[0030] In order to solve the above technical problems, the present application provides a new wireless power supply device that can convert the electrical energy of the power grid 10 into microwaves for transmission, replacing the existing guide plate, thereby reducing costs and solving safety problems caused by oxidation and deformation of the guide plate.

[0031] See also Figure 1 The embodiment of the present application provides a wireless power supply device for a power grid 10, including a vacuum container and a power supply component. The vacuum container encloses a vacuum cavity, and the power supply component is at least partially arranged in the vacuum cavity. The power supply component includes a sending module 20 and a receiving module 30. The sending module 20 is connected to the power grid 10 and converts the electric energy provided by the power grid 10 into microwaves for transmission. The receiving module 30 is used to receive microwaves and convert the microwaves into electric energy again for transmission to the power-consuming device 40.

[0032] The wireless power supply device in the embodiment of the present application can convert the electric energy output by the power grid 10 into microwaves by setting up the sending module 20 and the receiving module 30, and use the microwaves to transmit in the vacuum chamber to achieve electric energy transmission. By wireless transmission, the existing guide plate is replaced, which saves materials, reduces costs, and solves the safety problems caused by oxidation deformation of the guide plate, and has higher reliability.

[0033] It is understandable that by transmitting microwaves in a vacuum cavity, it means that during the movement of electrons, no collision occurs with the semiconductor lattice and heat is generated, which reduces the power loss during the transmission process and increases the residual energy that can be obtained by the electrical device 40, so as to better realize power transmission. The vacuum container includes but is not limited to a vacuum tank, which can be at least one of a cylinder, a sphere, and a box, that is, the vacuum container can form a closed environment, and can be evacuated by a vacuum pump to form a vacuum cavity.

[0034] In some optional embodiments, the vacuum degree in the vacuum chamber is less than or equal to 0.05 MPa.

[0035] Vacuum degree refers to the rarefaction of gas in a vacuum state. The vacuum degree in the vacuum container can be controlled by vacuum pumping equipment. By making the vacuum degree in the vacuum cavity less than or equal to 0.05MPa, the transmission environment of microwaves can be further guaranteed and the loss in the transmission process can be reduced.

[0036] Among them, for the transmitting module 20 and the receiving module 30, there are many kinds of devices that can generate microwaves, but they are mainly divided into two categories: semiconductor devices and electric vacuum devices. Electric vacuum devices are devices that use the movement of electrons in a vacuum to complete energy conversion, or are called electron tubes. Among the electric vacuum devices, magnetrons, multi-cavity klystrons, microwave triodes, quadrupoles, traveling wave tubes, etc. can generate high-power microwave energy. For example, magnetrons can directly convert electrical energy into microwave oscillation output.

[0037] There are also many types of devices that can receive microwaves, such as microwave antennas, satellite dishes, etc.

[0038] It can be understood that the sending module 20 can be any of the above-mentioned devices capable of converting electrical energy into microwaves, and the receiving module 30 can also be any of the above-mentioned devices capable of converting microwaves into electrical energy. The sending module 20 and the receiving module 30 are used in combination to meet the transmission requirements of electrical energy.

[0039] In some optional embodiments, the sending module 20 includes a high-frequency conversion component 21 and a microwave generator 22, the input end of the high-frequency conversion component 21 is connected to the power grid 10 and is used to convert the electric energy provided by the power grid 10 into high-frequency alternating current of a predetermined frequency, the output end of the high-frequency conversion component 21 is connected to the microwave generator 22, the receiving module 30 includes a microwave receiver 31 for receiving microwaves, and the microwave generator 22 and the microwave receiver 31 are arranged in the vacuum cavity.

[0040] Among them, microwave refers to electromagnetic waves with a frequency of 300MHz to 300GHz. Since the frequency of the industrial frequency mains input by the power grid 10 is lower than the microwave frequency, it is necessary to first use the high-frequency conversion component 21 to convert the industrial frequency mains input by the power grid 10 into high-frequency alternating current of a predetermined frequency. The output end of the high-frequency conversion component 21 is connected to the microwave generator 22, and the high-frequency alternating current is further emitted as microwaves, which are then received by the microwave receiver 31 and converted into electrical energy for use by the electrical equipment 40.

[0041] It is understandable that in the power supply device, at least the microwave generator 22 and the microwave receiver 31 are arranged in the vacuum chamber so that the microwave is transmitted in the vacuum environment to improve the power transmission effect. The high-frequency conversion component 21 can be arranged in the vacuum chamber or outside the vacuum chamber, and its specific position can be adjusted according to the structure of the vacuum container and the actual transmission requirements.

[0042] Optionally, the distance between the microwave generator 22 and the microwave receiver 31 is less than or equal to 1 meter, so as to facilitate the arrangement of the vacuum container and further reduce the loss of electric energy during the transmission process.

[0043] In order to convert the industrial frequency mains power input from the power grid 10 into high-frequency alternating current of a predetermined frequency, in some optional embodiments, the high-frequency conversion component 21 includes a first rectifier and filter circuit 211, a high-frequency inverter circuit 212, and a first control circuit 213 electrically connected in sequence, the first rectifier and filter circuit 211 is used to convert the electric energy provided by the power grid 10 into direct current, the high-frequency inverter circuit 212 converts direct current into high-frequency alternating current, and the first control circuit 213 controls the high-frequency alternating current to be transmitted to the microwave generator 22 at a predetermined frequency.

[0044] The industrial frequency mains power input from the power grid 10 first passes through the first rectifier filter circuit 211. The first rectifier filter circuit 211 includes a rectifier part and a filter part. The rectifier part processes the AC power input from the power grid 10 and converts it into DC power, while the filter part smoothes the rectified signal through a capacitor to improve the rectifier circuit and voltage waveform. The DC power after rectification and filtering is transmitted to the high-frequency inverter circuit 212. The high-frequency inverter circuit 212 is used to convert the DC power into high-frequency AC power with stable output voltage and frequency, and transmit the high-frequency AC power to the microwave generator 22 at a predetermined frequency and pulse width signal through the first control circuit 213.

[0045] By processing the electric energy input from the power grid 10 sequentially through the first rectifier filter circuit 211, the high-frequency inverter circuit 212 and the first control circuit 213, it is possible to convert the industrial frequency AC power input from the power grid 10 into high-frequency AC power of a predetermined frequency while achieving current filtering and voltage stabilization, thereby improving the power supply effect for the electrical equipment 40.

[0046] When the electrical equipment 40 is an electrolysis device, since the electrolysis device needs to be supplied with direct current to produce hydrogen, in some optional embodiments, the receiving module 30 also includes a rectifier component 32, the input end of the rectifier component 32 is connected to the microwave receiver 31, and the output end of the rectifier component 32 is connected to the electrical equipment 40.

[0047] That is, by providing a rectifier component 32 at the output end of the microwave receiver 31, the rectifier component 32 can receive the high-frequency alternating current converted by the microwave receiver 31, and rectify it to convert it into direct current for use in the electrolysis device.

[0048] It is understandable that when the power-consuming device 40 uses AC power, the rectifier component 32 may not be provided, and the high-frequency AC power converted by the microwave receiver 31 may be directly output to the power-consuming device 40. Moreover, based on different power-consuming devices 40, the AC power converted by the microwave receiver 31 may be processed differently to realize power supply to a specific power-consuming device 40.

[0049] For ease of description, the following description is made by taking the electrical equipment 40 as an electrolysis device as an example.

[0050] In some optional embodiments, the rectifier component 32 includes a second rectifier and filter circuit 321 and a second control circuit 322 electrically connected in sequence, the second rectifier and filter circuit 321 is used to convert the microwaves received by the microwave receiver 31 into direct current, and the second control circuit 322 controls the direct current to be transmitted to the electrical equipment 40 at a predetermined voltage.

[0051] The high-frequency alternating current converted by the microwave receiver 31 is first passed through the second rectifying and filtering circuit 321. The second rectifying and filtering circuit 321 includes a rectifying part and a filtering part. The rectifying part processes the converted high-frequency alternating current into direct current, and the filtering part smoothes the rectified signal through a capacitor to improve the rectifying circuit and voltage waveform. The rectified and filtered direct current is transmitted to the second control circuit 322, so that the direct current is stably output at a predetermined voltage through the second control circuit 322 to realize power supply to the electrolysis device.

[0052] Optionally, the second control circuit 322 may be configured as a PWM (Pulse Width Modulation) control circuit to control the output voltage of the power supply device to the electrolysis device.

[0053] In some optional embodiments, at least one of the sending module 20 and the receiving module 30 also includes a compensation circuit, which is used to generate a compensation component to adjust the voltage of the electric energy, thereby balancing the voltage, improving voltage stability, and improving power transmission capability.

[0054] Optionally, a compensation circuit can be arranged between the microwave receiver 31 and the rectifier component 32, that is, the high-frequency alternating current converted by the microwave receiver 31 will first pass through the compensation circuit to compensate for voltage fluctuations and maintain the three-phase voltage within a reasonable range, thereby improving the voltage stability and facilitating the subsequent transmission of electric energy.

[0055] It is understandable that before the electric energy transmitted by the power grid 10 is transmitted to the electrolysis device, the electric energy needs to be transformed. When wireless transmission is used for power supply, the transformer 50 can also be arranged before wireless transmission, that is, before the electric energy is converted into microwaves, to transform the electric energy. Alternatively, the transformer 50 can be arranged during the wireless transmission process, that is, the electric energy is transformed when it is converted into microwaves.

[0056] See also Figure 1 In some optional embodiments, when the transformer 50 is arranged before the wireless transmission, the wireless power supply device further includes a transformer 50 , one end of the transformer 50 is used to be connected to the power grid 10 , and the other end is connected to the sending module 20 .

[0057] At this time, the microwave generator 22 can be a transmitting antenna, and the microwave receiver 31 can be a receiving antenna. The transmitting antenna transforms the high-frequency alternating current propagating on the transmission line into electromagnetic waves propagating in the vacuum cavity, thereby realizing wireless transmission. The receiving antenna performs the opposite transformation, receiving the electromagnetic waves propagating in the vacuum cavity and transforming them into high-frequency alternating current, thereby realizing the conversion between electric energy and microwaves.

[0058] See also Figure 2 In some other optional embodiments, when the transformer 50 is set in the process of wireless transmission, the microwave generator 22 includes a primary magnetic core and a primary winding 221 wound on the primary magnetic core, the microwave receiver 31 includes a secondary magnetic core and a secondary winding 311 wound on the secondary magnetic core, the primary magnetic core and the secondary magnetic core are arranged at intervals, and the microwave generator 22 and the microwave receiver 31 are combined to form the transformer 50.

[0059] That is, the microwave generator 22 and the microwave receiver 31 can be combined to form a contactless transformer 50. The microwave generator 22 is the primary end of the contactless transformer 50, which includes a primary winding 221 wound on a primary magnetic core. After the high-frequency conversion component 21 converts the electric energy transmitted by the power grid 10 into high-frequency alternating current and outputs it to the primary end of the contactless transformer 50, an alternating magnetic field is generated through the primary winding 221. The microwave receiver 31 is the secondary end of the contactless transformer 50, which includes a secondary winding 311 wound on a secondary magnetic core. The secondary magnetic core and the primary magnetic core are separated from each other. After an alternating magnetic field is generated through the primary winding 221, the secondary end of the contactless transformer 50 will be inductively coupled to the energy and converted into high-frequency alternating current.

[0060] Furthermore, by adjusting the number of turns of the primary winding 221 and the secondary winding 311 , voltage changes can be achieved while wireless transmission is being performed.

[0061] To facilitate understanding of the technical solution of this application, Figure 1 and Figure 2 , taking the transformer 50 being arranged before wireless transmission as an example, the power supply principle of the wireless power supply device in an embodiment of the present application is explained.

[0062] For the wireless power supply device, it includes a transformer 50, a sending module 20 and a receiving module 30. The sending module 20 includes a first rectifier and filter circuit 211, a high-frequency inverter circuit 212, a first control circuit 213 and a microwave generator 22 which are electrically connected in sequence. The receiving module 30 includes a microwave receiver 31, a second rectifier and filter circuit 321 and a second control circuit 322.

[0063] Specifically, the electric energy transmitted by the power grid 10 will first be transformed by the transformer 50 and then transmitted to the sending module 20. In the sending module 20, the first rectifier and filter circuit 211 will convert the transformed AC power into DC power and supply it to the high-frequency inverter circuit 212. The high-frequency inverter circuit 212 and the first control circuit 213 convert the DC power into high-frequency AC power with a preset frequency and output it to the microwave generator 22, and emit it in the form of microwaves.

[0064] The microwaves are transmitted to the microwave receiver 31 through the vacuum cavity. In the receiving module 30, the microwave receiver 31 converts the microwaves received into electrical energy and transmits it to the second rectifying and filtering circuit 321. The second rectifying and filtering circuit 321 and the second control circuit 322 convert the compensated high-frequency alternating current into direct current and transmit it to the electrolysis device at a predetermined voltage, thereby realizing the power supply of the electrolysis device.

[0065] The embodiment of the present application further provides a power supply system, including a wind turbine generator set and a wireless power supply device as in the above implementation, wherein a sending module 20 of the wireless power supply device is connected to a power grid 10 of the wind turbine generator set.

[0066] Since the power supply system includes the wireless power supply device in the above embodiment, it also has the effect of the wireless power supply device, and the same parts are not repeated here. In addition, since the wireless power supply device uses wireless transmission to transmit electric energy, compared with the transmission method of the guide plate, it can solve the safety problems caused by the power grid fluctuation of the wind turbine generator set, has higher reliability, lower cost, and is more convenient for application.

[0067] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A wireless power supply device, used in a power grid (10), characterized in that: include: A vacuum container, enclosing a vacuum chamber; A power supply component is at least partially disposed in the vacuum chamber, the power supply component comprising a sending module (20) and a receiving module (30), the sending module (20) being connected to the power grid (10) and converting the electric energy provided by the power grid (10) into microwaves for transmission, and the receiving module (30) being used to receive the microwaves and convert the microwaves again into electric energy for transmission to the power-consuming device (40).

2. The wireless power supply device according to claim 1, characterized in that: The transmitting module (20) comprises a high-frequency conversion component (21) and a microwave generator (22); the input end of the high-frequency conversion component (21) is connected to the power grid (10) and is used to convert the electric energy provided by the power grid (10) into high-frequency alternating current of a predetermined frequency; and the output end of the high-frequency conversion component (21) is connected to the microwave generator (22); The receiving module (30) comprises a microwave receiver (31) for receiving the microwaves, and the microwave generator (22) and the microwave receiver (31) are arranged in the vacuum chamber.

3. The wireless power supply device according to claim 2, characterized in that: The high-frequency conversion component (21) comprises a first rectifying and filtering circuit (211), a high-frequency inverter circuit (212) and a first control circuit (213) which are electrically connected in sequence; The first rectifying and filtering circuit (211) is used to convert the electric energy provided by the power grid (10) into direct current, the high-frequency inverter circuit (212) converts the direct current into high-frequency alternating current, and the first control circuit (213) controls the high-frequency alternating current to be transmitted to the microwave generator (22) at a predetermined frequency.

4. The wireless power supply device according to claim 2, characterized in that: The receiving module (30) further comprises a rectifying component (32), the input end of the rectifying component (32) being connected to the microwave receiver (31), and the output end of the rectifying component (32) being connected to the electrical device (40).

5. The wireless power supply device according to claim 4, characterized in that: The rectifier component (32) comprises a second rectifier filter circuit (321) and a second control circuit (322) which are electrically connected in sequence; The second rectifying and filtering circuit (321) is used to convert the microwaves received by the microwave receiver (31) into direct current, and the second control circuit (322) controls the direct current to be transmitted to the electrical device (40) at a predetermined voltage.

6. The wireless power supply device according to any one of claims 2 to 5, characterized in that: At least one of the sending module (20) and the receiving module (30) further comprises a compensation circuit, wherein the compensation circuit is used to generate a compensation component to adjust the voltage of the electric energy.

7. The wireless power supply device according to any one of claims 2 to 5, characterized in that: The microwave generator (22) comprises a primary magnetic core and a primary winding (221) wound on the primary magnetic core, the microwave receiver (31) comprises a secondary magnetic core and a secondary winding (311) wound on the secondary magnetic core, the primary magnetic core and the secondary magnetic core are arranged at intervals, and the microwave generator (22) and the microwave receiver (31) are combined to form a transformer (50).

8. The wireless power supply device according to claim 1, characterized in that: The wireless power supply device further comprises a transformer (50), one end of the transformer (50) being connected to the power grid (10) and the other end of the transformer (50) being connected to the transmission module (20).

9. The wireless power supply device according to claim 1, characterized in that: The vacuum degree in the vacuum chamber is less than or equal to 0.05 MPa.

10. A power supply system, characterized in that: It comprises a wind turbine generator set and a wireless power supply device as claimed in any one of claims 1 to 9, wherein a sending module (20) of the wireless power supply device is connected to a power grid (10) of the wind turbine generator set.

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