Direct drive type wind power generation device based on superconducting magnetic gear

Abstract

The invention discloses a direct-driven wind power generation device based on a superconducting magnetic gear, which belongs to the technical field of wind power generation and comprises an impeller, a superconducting variable-speed magnetic gear box and a generator. The superconductive variable-speed magnetic gear box comprises a superconductive modulation type planetary magnetic gear, a magnetic coupling and a superconductive composite magnetic circuit modulation type magnetic gear; in the superconducting modulation type planet magnetic gear, an outer rotor rotates to generate a magnetic field, and an inner rotor is driven to rotate in an accelerated mode under the modulation effect of a planet carrier capable of maintaining the superconducting critical state; in the superconducting composite directional magnetic circuit modulation type magnetic gear, a front gear rotates to generate a magnetic field, and a rear gear is driven to rotate in an accelerated mode under the modulation effect of a modulation block assembly capable of maintaining a superconducting critical state. Loss in the rotating kinetic energy transmission process can be greatly reduced, the rotating kinetic energy utilization rate is increased, a complex and heavy oil injection lubrication cooling system is not needed, energy consumption is small, the weight is light, operation and maintenance are easy and convenient, and the operation and maintenance cost is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation, and relates to a wind power generation device, and in particular to a direct-drive wind power generation device based on superconducting magnetic gears. Background Art

[0002] With the rapid development of the global economy and the continuous increase in global energy demand, the effective utilization period of many non-renewable energy sources is getting shorter and shorter, and energy problems are becoming more and more serious. Among them, electric energy is an indispensable part of people's daily life. Since the Second Industrial Revolution, the application of electric energy has not only promoted social productivity, but also entered thousands of households, bringing great convenience to people's lives. As a secondary energy source, electric energy cannot be directly obtained from nature, but needs to be processed and converted from primary energy. Primary energy is divided into non-renewable energy, such as coal, oil, natural gas, etc., and renewable energy, such as wind energy, solar energy, ocean energy, etc.

[0003] Wind energy, as a manifestation of solar energy, exists on the surface in the form of kinetic energy. Compared with solar energy, the total amount of wind energy generation is greater; compared with wave energy, wind power generation is more stable. At the same time, wind energy, as a renewable clean energy, has large reserves and wide distribution, and the facilities for wind power generation are becoming more and more advanced, which not only greatly reduces production costs, but also protects the ecological environment. Therefore, the development and utilization of wind energy has good environmental, social and economic benefits. For example, the invention with publication number CN110439729A discloses a high-power hybrid wind gearbox, which combines a low-speed mechanical gear with a medium-speed magnetic gear and a high-speed magnetic gear. In this way, there is no need for a complex and bulky oil injection lubrication cooling system, and the energy consumption is low and the weight is light, which can greatly reduce the operation and maintenance costs. However, such a design cannot maximize the use of wind energy. At the same time, due to the use of mechanical gears, there will still be a lot of loss in the transmission of kinetic energy. Therefore, this structure is more suitable for doubly fed and semi-direct drive wind turbines. Therefore, there is an urgent need for a device with low kinetic energy loss and the ability to utilize wind energy as much as possible. Summary of the invention

[0004] The present invention provides a direct-drive wind power generation device based on superconducting magnetic gears, which can greatly improve the wind energy utilization efficiency and reduce the loss during the transmission of rotational kinetic energy, so as to overcome the defects of the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A direct-drive wind power generation device based on superconducting magnetic gears comprises an impeller, a speed change mechanism and a generator. The impeller converts wind energy into rotational kinetic energy, is accelerated by the speed change mechanism and connected to the generator, and the generator converts the rotational kinetic energy into electrical energy. The speed change mechanism is a superconducting speed change magnetic gearbox, comprising a superconducting modulated planetary magnetic gear, a magnetic coupling and a superconducting composite magnetic circuit modulated magnetic gear. The superconducting modulated planetary magnetic gear comprises an outer rotor, a planet carrier and an inner rotor. The outer rotor generates a magnetic field as the impeller rotates, and drives the inner rotor to rotate faster under the modulation action of the planet carrier that can maintain a superconducting critical state. The superconducting composite magnetic circuit modulated magnetic gear comprises a front gear, a modulation block assembly and a rear gear. The front gear generates a magnetic field as the inner rotor rotates through the magnetic coupling, and drives the rear gear to rotate faster under the modulation action of the modulation block assembly that can maintain a superconducting critical state.

[0007] To optimize the above technical solutions, the specific measures taken also include:

[0008] Furthermore, in the superconducting modulated planetary magnetic gear, the inner rotor includes an inner iron yoke and an inner permanent magnet ring, and a plurality of inner permanent magnets constitute the inner permanent magnet ring, which is wrapped around the outer side of the annular inner iron yoke; the outer rotor includes an outer iron yoke and an outer permanent magnet ring, and a plurality of outer permanent magnets constitute the outer permanent magnet ring, which is pasted on the inner side of the annular outer iron yoke; the planet carrier is an annular structure composed of a plurality of planetary gears, which is installed between the inner permanent magnet ring and the outer permanent magnet ring, and there is an air gap between the planetary gears; the planetary gears can maintain a superconducting critical state.

[0009] Furthermore, the planetary carrier is equipped with a superconducting refrigeration device; the planetary gear is a cylindrical structure made of silicon steel, the interior of which is filled with liquid nitrogen coolant, and under the action of the superconducting refrigeration device, the superconducting critical state is maintained.

[0010] Furthermore, the input shaft of the superconducting modulated planetary magnetic gear is connected to the outer rotor, and there is a gap between the input shaft and the planet carrier, and the superconducting refrigeration device is installed in the gap; each planetary gear is connected to the superconducting refrigeration device through a pipeline, and the interior of the pipeline is composed of a plastic input pipe and an output pipe. The input pipe inputs liquid nitrogen coolant into the planetary gear, and the output pipe recovers the liquid nitrogen coolant after the action to the superconducting refrigeration device.

[0011] Furthermore, the sum of the pole pairs of the inner permanent magnet and the outer permanent magnet is equal to the pole pair number of the planet gear.

[0012] Furthermore, in the superconducting composite magnetic circuit modulated magnetic gear, the front gear is a permanent magnet ring composed of a plurality of small permanent magnets, and the rear gear is a permanent magnet ring composed of a plurality of large permanent magnets, and the number of large permanent magnets is less than that of small permanent magnets; the modulation block assembly includes a plurality of T-type modulation blocks; the T-type modulation block is T-shaped, the lateral part covers the outer surface of the front gear and the rear gear, and the vertical part is inserted between the front gear and the rear gear; the plurality of T-type modulation blocks are arranged at intervals, and there are gaps between them; the T-type modulation block can maintain a superconducting critical state.

[0013] Furthermore, the superconducting composite magnetic circuit modulated magnetic gear also includes a protective shell; the protective shell is annular and is arranged on the outside of the lateral part of the T-type modulation block; the outside of the lateral part of the T-type modulation block has a protrusion, which is inserted into the protective shell; the T-type modulation block is made of alloy material; the protective shell is filled with liquid nitrogen coolant and contacts with the protrusion of the T-type modulation block; the modulation block assembly is also equipped with a superconducting refrigeration device; the superconducting refrigeration device maintains the superconducting critical state of the T-type modulation block through liquid nitrogen coolant.

[0014] Furthermore, a protective layer is provided on the outer side of the protective shell, and a superconducting refrigeration device is provided between the liquid nitrogen coolant and the protective layer.

[0015] Furthermore, the sum of the number of permanent magnet pole pairs of the front gear and the rear gear is equal to the number of pole pairs of the T-type modulation block.

[0016] Furthermore, the magnetic coupling is a radial arc surface transmission type magnetic transmission coupling, including an outer magnet, a coupling pole, an isolation sleeve and an inner magnet; the inner magnet is arranged in the outer magnet, the inner magnet is connected to the output shaft of the superconducting modulation type planetary magnetic gear, and the outer magnet is connected to the input shaft of the superconducting composite magnetic circuit modulation type magnetic gear; the isolation sleeve is fixed and arranged between the inner magnet and the outer magnet; a part of the coupling pole is glued to the inner side of the outer magnet, and a part of it is glued to the outer side of the inner magnet.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention utilizes the magnetic shielding effect of a special high-temperature superconducting device to strengthen the magnetic field passing through the magnetic modulation ring and improve the concentration of the magnetic field, thereby improving the transmission efficiency characteristics of the torque.

[0019] Second, the present invention adopts magnetic gears for combination to achieve mechanical isolation, so that the mechanical vibration of the impeller will not be transmitted to the generator, effectively solving the resonance problem.

[0020] 3. The magnetic gear of the present invention transmits large torque without mechanical contact, which can save the complex and bulky oil lubrication and cooling system, so that the gear box is small in size, light in weight, and low in energy consumption, reducing the operation and maintenance cost of the wind power generation device and improving the system operation performance and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of a direct-drive wind power generation device based on superconducting magnetic gears;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of a superconducting modulation type planetary magnetic gear;

[0023] Figure 3 It is a structural schematic diagram of a superconducting composite magnetic circuit modulated magnetic gear;

[0024] Figure 4 It is a schematic diagram of the main structure of a superconducting composite magnetic circuit modulated magnetic gear;

[0025] Figure 5 It is a schematic diagram of the structure of the T-type modulation block;

[0026] Figure 6 It is a structural diagram of a magnetic coupling. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is described below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, the present invention provides a direct-drive wind power generation device based on superconducting magnetic gears, including an impeller 1, a superconducting variable speed magnetic gearbox and a generator 5. The impeller 1 converts wind energy into rotational kinetic energy, and is connected to the generator 5 after being accelerated by the superconducting variable speed magnetic gearbox, and the generator 5 converts the rotational kinetic energy into electrical energy. The superconducting variable speed magnetic gearbox includes a superconducting modulated planetary magnetic gear 2, a magnetic coupling 3 and a superconducting composite magnetic circuit modulated magnetic gear 4.

[0029] like Figure 1 to Figure 4 As shown, the superconducting modulated planetary magnetic gear 2 includes an outer rotor 21, a planet carrier and an inner rotor 23. The outer rotor 21 rotates with the impeller 1 to generate a magnetic field, and under the modulation of the planet carrier that can maintain the superconducting critical state, drives the inner rotor 23 to accelerate rotation. The superconducting composite magnetic circuit modulated magnetic gear 4 includes a front gear 41, a modulation block assembly and a rear gear 43. The front gear 41 rotates with the inner rotor 23 through the magnetic coupling 3 to generate a magnetic field, and under the modulation of the modulation block assembly that can maintain the superconducting critical state, drives the rear gear 43 to accelerate rotation. The superconducting variable speed magnetic gearbox achieves secondary acceleration through the superconducting modulated planetary magnetic gear 2 and the superconducting composite magnetic circuit modulated magnetic gear 4.

[0030] About superconducting modulated planetary magnetic gear 2: Figure 2As shown, the inner rotor 23 includes an inner iron yoke 231 and an inner permanent magnet ring 232, and a plurality of inner permanent magnets form the inner permanent magnet ring 232, which is wrapped around the outer side of the annular inner iron yoke 231; the outer rotor 21 includes an outer iron yoke 211 and an outer permanent magnet ring 212, and a plurality of outer permanent magnets form the outer permanent magnet ring 212, which is pasted on the inner side of the annular outer iron yoke 211. The planet carrier is an annular structure composed of a plurality of planetary gears 22, which is installed between the inner permanent magnet ring 232 and the outer permanent magnet ring 212, and there is an air gap between the planetary gears 22. The planetary gears 22 can maintain a superconducting critical state. The sum of the pole pairs of the inner permanent magnet and the outer permanent magnet is equal to the pole pair number of the planetary gear 22.

[0031] Specifically, the planet carrier is equipped with a superconducting refrigeration device. The planetary gear 22 is a cylindrical structure made of silicon steel, and is filled with liquid nitrogen coolant. Under the action of the superconducting refrigeration device, the superconducting critical state is maintained.

[0032] In a specific embodiment, the input shaft of the superconducting modulated planetary magnetic gear 2 is connected to the outer rotor 21, and there is a gap between the input shaft and the planet carrier, and the superconducting refrigeration device is installed in the gap. Each planetary gear 22 is connected to the superconducting refrigeration device through a pipeline, and the inside of the pipeline is composed of a plastic input pipe and an output pipe. The input pipe uses pressure to input liquid nitrogen coolant into the planetary gear 22, and the output pipe recovers the liquid nitrogen coolant after the action to the superconducting refrigeration device.

[0033] The planetary gear 22 maintains a superconducting critical state, continuously generates the Meissner effect, prevents the magnetic field inside the planetary gear 22 from penetrating, makes the magnetic circuit between the planetary carriers avoid the planetary gear 22, and forms a magnetizing bunching effect in the air gap between the planetary gears 22. The planetary gear 22 acts as a modulation block, which can freely rotate to modulate the magnetic field, provide magnetomotive force, enhance the gas magnetic field, and greatly improve the torque transmission capacity. According to the magnetic field modulation principle, the planetary carrier modulates the spatial magnetic flux harmonics with a lower pole pair number generated by the low-speed rotation of the outer rotor 21 and the spatial magnetic flux harmonics with a higher pole pair number generated by the high-speed rotation of the inner rotor 23 to make them interact with each other, so that the inner rotor 23 and the outer rotor 21 are magnetically coupled, and stable torque transmission is achieved at different speeds.

[0034] About superconducting composite magnetic circuit modulated magnetic gear 4: Figure 3 and Figure 4 As shown, the front gear 41 is a permanent magnet ring composed of a plurality of small permanent magnets, and the rear gear 43 is a permanent magnet ring composed of a plurality of large permanent magnets, the number of large permanent magnets is smaller than that of small permanent magnets, thereby generating spatial magnetic density harmonics with different pole pairs. The permanent magnet rings are formed by alternating arrangement of N-level permanent magnets and S-level permanent magnets, and magnetic silicon steel with pole shoes is embedded between the N-level permanent magnets and the S-level permanent magnets to generate a magnetic concentration effect.

[0035] The modulation block assembly includes a plurality of T-type modulation blocks 42. Figure 5As shown, the T-type modulation block 42 is T-shaped, the lateral part covers the outer surface of the front gear 41 and the rear gear 43, so that the lateral magnetic field passes through the outer ring of the magnetic gear, and the vertical part is inserted between the front gear 41 and the rear gear 43, so that there is a gap between the front gear 41 and the rear gear 43, and the axial magnetic field can pass through. Several T-type modulation blocks 42 are arranged at intervals, and there are gaps between them. The T-type modulation block 42 can maintain a superconducting critical state. The sum of the number of permanent magnet pole pairs of the front gear 41 and the rear gear 43 is equal to the number of pole pairs of the T-type modulation block 42.

[0036] Specifically, the superconducting composite magnetic circuit modulated magnetic gear 4 also includes a protective shell 44. The protective shell 44 is annular and is arranged on the outside of the lateral part of the T-type modulation block 42. The outside of the lateral part of the T-type modulation block 42 has a protrusion, which is inserted into the protective shell 44. The T-type modulation block 42 is made of alloy material and is a high-temperature superconductor. The protective shell 44 is filled with liquid nitrogen coolant and contacts the protrusion of the T-type modulation block 42. The modulation block assembly is also equipped with a superconducting refrigeration device. The superconducting refrigeration device maintains the superconducting critical state of the T-type modulation block 42 through the liquid nitrogen coolant. A protective layer 441 is provided on the outside of the protective shell 44. The superconducting refrigeration device is arranged between the liquid nitrogen coolant and the protective layer 441.

[0037] The T-type modulation block 42 maintains the superconducting critical state, continuously generates the Meissner effect, and prevents the magnetic field inside the T-type modulation block 42 from penetrating, so that the magnetic field forms a magnetic circuit only in the gaps between the T-type modulation blocks 42, and forms a magnetization bunching effect in the gaps. According to the magnetic field modulation principle of the T-type modulation block 42, the torque density of the superconducting composite magnetic circuit modulation type magnetic gear 4 can be greatly enhanced.

[0038] About magnetic coupling 3: Figure 6 As shown, the force coupling 3 is a radial arc surface transmission type magnetic force transmission coupling, including an outer magnet 31, a coupling pole 32, a spacer sleeve 33 and an inner magnet 34. The inner magnet 34 is arranged in the outer magnet 31, and the inner magnet 34 is connected to the output shaft of the superconducting modulation type planetary magnetic gear 2, and the outer magnet 31 is connected to the input shaft of the superconducting composite magnetic circuit modulation type magnetic gear 4. The spacer sleeve 33 is fixed and arranged between the inner magnet 34 and the outer magnet 31. A part of the coupling pole 32 is glued to the inner side of the outer magnet 31, and a part is glued to the outer side of the inner magnet 34.

[0039] The isolation sleeve 33 separates the inner magnet 34 and the outer magnet 31. When the inner magnet 34 rotates, the outer magnet 31 receives the pulling force of the magnetic force and rotates in the same direction as the inner magnet 34. In this process, the inner magnet 34 and the outer magnet 31 are separated by the isolation sleeve 33 and have no actual contact, so there is no friction. The output shaft of the superconducting modulated planetary magnetic gear 2 is connected to the input shaft of the superconducting composite magnetic circuit modulated magnetic gear 4 through the magnetic coupling 3, which can prevent the machine from malfunctioning due to excessive rotation speed.

[0040] The working process of the direct-drive wind power generation device based on superconducting magnetic gears is as follows: when the wind speed reaches the cut-in wind speed, the wind drives the impeller 1 to rotate, and the main shaft of the impeller 1 rotates accordingly, thereby driving the outer rotor 21 of the superconducting modulated planetary magnetic gear 2 to rotate at a low speed. The magnetic field generated by the outer rotor 21 is modulated by the planetary gear 22 to generate rich magnetic field harmonics. Through magnetic field coupling, the inner rotor 23 is driven to rotate at a speed higher than the outer rotor 21, achieving the first stage of speed increase, and then the output shaft of the medium-speed inner rotor 23 drives the front gear 41 of the superconducting composite magnetic circuit modulated magnetic gear 4 to rotate through the magnetic coupling 3. Similar to the speed increase principle of the superconducting modulated planetary magnetic gear 2, the superconducting composite magnetic circuit modulated magnetic gear 4 performs the second stage of speed increase, and the output shaft connected to the high-speed rear gear 43 outputs torque, which drives the rotating shaft of the generator 5 to rotate through the coupling of the generator 5, so that the generator 5 generates electricity.

[0041] The present invention adopts a superconducting variable speed magnetic gearbox to achieve acceleration, which can greatly reduce the loss in the process of rotational kinetic energy transmission, improve the utilization rate of rotational kinetic energy, and does not require a complex and bulky oil injection lubrication and cooling system. It has low energy consumption, light weight, simple operation and maintenance, and greatly reduces operation and maintenance costs.

[0042] In the present invention, unless otherwise specified, the scientific and technical terms used herein have the meanings commonly understood by those skilled in the art.

[0043] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. cited in the invention are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0044] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A direct-drive wind power generation device based on superconducting magnetic gears, comprising an impeller, a speed change mechanism and a generator. The impeller converts wind energy into rotational kinetic energy, which is accelerated by the speed change mechanism and connected to the generator, and the generator converts the rotational kinetic energy into electrical energy, characterized in that: The speed change mechanism is a superconducting speed change magnetic gear box, including a superconducting modulated planetary magnetic gear, a magnetic coupling and a superconducting composite magnetic circuit modulated magnetic gear; The superconducting modulated planetary magnetic gear includes an outer rotor, a planet carrier and an inner rotor; the outer rotor generates a magnetic field as the impeller rotates, and drives the inner rotor to accelerate its rotation under the modulation of the planet carrier that can maintain the superconducting critical state; The superconducting composite magnetic circuit modulated magnetic gear comprises a front gear, a modulation block assembly and a rear gear; the front gear generates a magnetic field by rotating with the inner rotor through a magnetic coupling, and drives the rear gear to accelerate rotation under the modulation action of the modulation block assembly that can maintain the superconducting critical state.

2. The direct-drive wind power generation device based on superconducting magnetic gears according to claim 1 is characterized in that: In the superconducting modulated planetary magnetic gear, the inner rotor includes an inner iron yoke and an inner permanent magnet ring, and a plurality of inner permanent magnets form the inner permanent magnet ring, which is wrapped around the outer side of the annular inner iron yoke; the outer rotor includes an outer iron yoke and an outer permanent magnet ring, and a plurality of outer permanent magnets form the outer permanent magnet ring, which is pasted on the inner side of the annular outer iron yoke; The planet carrier is an annular structure composed of a number of planetary gears, which is installed between the inner permanent magnet ring and the outer permanent magnet ring, and there is an air gap between the planetary gears; the planetary gears can maintain a superconducting critical state.

3. The direct-drive wind power generation device based on superconducting magnetic gears according to claim 2 is characterized in that: The planetary frame is equipped with a superconducting refrigeration device; the planetary wheel is a cylindrical structure made of silicon steel, and is filled with liquid nitrogen coolant. Under the action of the superconducting refrigeration device, the superconducting critical state is maintained.

4. The direct-drive wind power generation device based on superconducting magnetic gears according to claim 3 is characterized in that: The input shaft of the superconducting modulated planetary magnetic gear is connected to the outer rotor, and there is a gap between the input shaft and the planet carrier, and the superconducting refrigeration device is installed in the gap; each planetary gear is connected to the superconducting refrigeration device through a pipeline, and the inside of the pipeline is composed of a plastic input pipe and an output pipe. The input pipe inputs liquid nitrogen coolant into the planetary gear, and the output pipe recovers the liquid nitrogen coolant after the action to the superconducting refrigeration device.

5. The direct-drive wind power generation device based on superconducting magnetic gears according to claim 2 is characterized in that: The sum of the pole pairs of the inner permanent magnet and the outer permanent magnet is equal to the pole pair number of the planet gear.

6. The direct-drive wind power generation device based on superconducting magnetic gears according to claim 1 is characterized in that: In the superconducting composite magnetic circuit modulated magnetic gear, the front gear is a permanent magnet ring composed of a number of small permanent magnets, and the rear gear is a permanent magnet ring composed of a number of large permanent magnets, and the number of large permanent magnets is less than that of small permanent magnets; The modulation block assembly includes several T-type modulation blocks; the T-type modulation blocks are T-shaped, with the lateral part covering the outer surfaces of the front gear and the rear gear, and the vertical part inserted between the front gear and the rear gear; the several T-type modulation blocks are arranged at intervals with gaps between them; the T-type modulation blocks can maintain a superconducting critical state.

7. The direct-drive wind power generation device based on superconducting magnetic gears according to claim 6 is characterized in that: The superconducting composite magnetic circuit modulated magnetic gear also includes a protective shell; The protective shell is annular and is arranged on the outside of the lateral part of the T-shaped modulation block; The outer side of the lateral part of the T-shaped modulation block has a protrusion which is inserted into the protective shell; The T-type modulation block is made of alloy; the protective shell is filled with liquid nitrogen coolant and contacts the protrusion of the T-type modulation block; the modulation block assembly is also equipped with a superconducting refrigeration device; the superconducting refrigeration device maintains the superconducting critical state of the T-type modulation block through liquid nitrogen coolant.

8. The direct-drive wind power generation device based on superconducting magnetic gears according to claim 7 is characterized in that: A protective layer is arranged on the outer side of the protective shell.

9. The direct-drive wind power generation device based on superconducting magnetic gears according to claim 6 is characterized in that: The sum of the permanent magnet pole pairs of the front gear and the rear gear is equal to the pole pair number of the T-type modulation block.

10. The direct-drive wind power generation device based on superconducting magnetic gears according to claim 1 is characterized in that: The magnetic coupling is a radial arc surface transmission type magnetic transmission coupling, comprising an outer magnet, a coupling pole, a spacer sleeve and an inner magnet; The inner magnet is arranged inside the outer magnet, the inner magnet is connected to the output shaft of the superconducting modulation type planetary magnetic gear, and the outer magnet is connected to the input shaft of the superconducting composite magnetic circuit modulation type magnetic gear; The isolation sleeve is fixed and arranged between the inner magnet and the outer magnet; a part of the coupling magnetic pole is adhered to the inner side of the outer magnet, and a part of the coupling magnetic pole is adhered to the outer side of the inner magnet.

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