A series superconducting motor combination

Abstract

The application relates to the motor technical field, and particularly discloses a series superconducting motor combination, which comprises a plurality of superconducting motor groups and a combined power supply, the superconducting motor group comprises a full superconducting motor and a half superconducting motor connected through a transmission three-jaw, the full superconducting motor and the half superconducting motor are connected on the combined power supply in sequence after being connected in series respectively, the full superconducting motor comprises a motor shell, a stator, a rotor and a low-temperature cooling system, the stator comprises a stator iron core and stator superconducting windings arranged on the stator iron core in a spaced mode, the rotor comprises a rotating shaft, a rotor iron core and rotor superconducting windings arranged on the rotor iron core in a spaced mode, and the low-temperature cooling system is used for cooling the stator superconducting windings and the rotor superconducting windings; the half superconducting motor is different from the full superconducting motor in that the winding material is a copper wire winding. In the application, the loss is low, the efficiency is high, the application can be operated for a long time without failure, and the application is particularly suitable for the fields of wind power generation, hydroelectric power generation and the like, can effectively meet the actual working requirements, and saves the power consumption cost.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, and specifically relates to a series superconducting motor assembly. Background Technology

[0002] Since the discovery of high-temperature superconducting materials in 1986, researchers have envisioned using them to manufacture high-performance motors. While low-temperature superconducting motors had existed before, their high cost prevented commercialization. However, compared to low-temperature superconductors, high-temperature superconductors possess advantages such as higher current-carrying capacity, higher critical temperature, and relatively better performance under magnetic fields, thus attracting widespread attention.

[0003] High-temperature superconducting motors (HTS motors) are a new type of high-performance motor made by replacing conventional copper wire coils with high-temperature superconducting wire coils as the excitation winding or armature winding. High-temperature superconducting materials possess high current-carrying capacity, which can overcome the limitations of ferromagnetic material saturation magnetic flux density, thereby effectively increasing the power density of the motor and reducing its size and weight. Compared with motors made of conventional copper wire, high-temperature superconducting motors have the following advantages:

[0004] (1) Small size, light weight, and high power density;

[0005] High-temperature superconducting wires have a current-carrying capacity (current density) more than 100 times greater than copper wires. Therefore, HTS motor windings made with high-temperature superconducting wires are much smaller in weight and volume than those of conventional motors. Furthermore, the saturation magnetic induction of the iron core used in conventional motors is generally less than 2 Tesla, while the high-temperature superconducting windings of HTS motors can generate a magnetic field strength greater than 5 Tesla. Consequently, the power density of HTS motors can be much higher than that of conventional motors, and their volume and weight can be only 30% to 50% of that of conventional motors.

[0006] (2) High efficiency;

[0007] High-temperature superconducting wires have a current density approximately two orders of magnitude higher than copper wires, with virtually no Joule heat loss. A 4MW HTS motor achieves an efficiency of up to 98.7%, about 2.0% higher than a conventional motor of the same class. Efficiency remains high even at low power outputs.

[0008] (3) Other advantages include low noise and relatively simple maintenance.

[0009] High-temperature superconducting motors come in various forms, including DC motors, AC synchronous motors, linear motors, and reluctance motors. The losses in high-temperature superconducting wires when carrying DC current are minimal and negligible, but they exhibit significant losses under AC conditions. Without structural innovation and optimization, these additional losses can substantially offset the efficiency gains achieved by using superconducting materials, and may even hinder the normal operation of the high-temperature superconducting motor.

[0010] To address these technical problems, we propose a series superconducting motor combination. Summary of the Invention

[0011] To address the technical problems in the prior art, this invention proposes a series superconducting motor combination, aiming to optimize the motor structure and provide a superconducting motor structure with low loss and high efficiency that can meet actual working requirements, thereby saving electricity costs.

[0012] The technical solution adopted in this invention is as follows:

[0013] A series superconducting motor assembly includes multiple superconducting motor units and a combined power supply. Each superconducting motor unit includes a fully superconducting motor and a semi-superconducting motor. The output shafts of the fully superconducting motor and the semi-superconducting motor are connected via a three-jaw chuck. The fully superconducting motor and the semi-superconducting motor are connected in series and then connected to the combined power supply to form the superconducting motor assembly. The fully superconducting motor includes a motor housing, a stator, a rotor, and a cryogenic cooling system. The motor housing is in a vacuum state. The stator includes a stator core and multiple stator superconducting windings spaced apart on the stator core. The stator core can... The rotor is rotatably installed inside the motor housing. The rotor includes a shaft, a rotor core, and multiple rotor superconducting windings spaced apart on the rotor core. The shaft passes through the motor housing and is rotatably connected to the motor housing. The rotor core is fixedly sleeved on the shaft. A drive assembly is provided on the shaft. The output end of the drive assembly is driven by the stator core and can drive the stator core to rotate relative to the rotor core. The cryogenic cooling system is used to cool the stator superconducting windings and the rotor superconducting windings. The difference between the structure of the semi-superconducting motor and the fully superconducting motor is that the winding material is copper wire winding.

[0014] In a further technical solution, the drive assembly includes a gear ring, a drive gear, and a driven gear. The gear ring is connected to one end of the stator core, the drive gear is fixedly sleeved on the rotating shaft, and the driven gear is rotatably mounted on the motor housing. Both the gear ring and the drive gear mesh with the driven gear.

[0015] In a further technical solution, a connecting plate is also included. The connecting plate is fixedly connected to the motor housing. The rotating shaft passes through the connecting plate and is rotatably connected to the connecting plate. Multiple driven gears are provided and arranged in a ring on the connecting plate. All driven gears are rotatably connected to the connecting plate.

[0016] In a further technical solution, the cryogenic cooling system includes a refrigerant container, a refrigerator, a refrigerant inlet pipe, a refrigerant outlet pipe, and a cryogenic circulating pump. The refrigerant container and the refrigerator are connected. The two ends of the refrigerant inlet pipe are connected to the refrigerator and the motor housing, respectively. One end of the refrigerant outlet pipe is connected to the bottom of the motor housing, and the other end is connected to the cryogenic circulating pump. The cryogenic circulating pump is connected to the refrigerant container.

[0017] In a further technical solution, the refrigerant is one of cold helium, liquid neon, and liquid nitrogen.

[0018] In a further technical solution, multiple sliders are arranged in a ring on the outer side wall of the stator core, and a groove is provided on the inner side wall of the motor housing to cooperate with the sliders, with the sliders located in the groove.

[0019] In a further technical solution, both the stator superconducting winding and the rotor superconducting winding are made of high-temperature superconducting wire.

[0020] In a further technical solution, the high-temperature superconducting wire is either a Bi-2223 / Ag high-temperature superconducting wire or a Bi-2212 / Ag high-temperature superconducting wire.

[0021] In a further technical solution, both the stator superconducting winding and the rotor superconducting winding are racetrack-shaped, elliptical, or rectangular.

[0022] In a further technical solution, the shape of the motor housing is one of cylindrical, cubic, and cuboid, and the vacuum degree inside the motor housing ranges from 10 Pa to 0.1 MPa.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] This invention provides a structure for a series superconducting motor assembly. A fully superconducting motor drives a semi-superconducting motor to rotate efficiently, thereby generating high-efficiency electrical energy. In the fully superconducting motor, the stator and rotor operate relative to each other, accelerating the change rate of their magnetic fields, which increases power generation and efficiency. Furthermore, the stator and rotor superconducting windings operate in a low-temperature environment generated by circulating cryogenic coal, utilizing the unique properties of superconducting materials such as zero resistance and complete repulsion of external magnetic fields. This results in a high-power, low-loss superconducting motor, significantly improving the power-to-weight ratio of the superconducting motor. This not only represents a breakthrough in motor size but also requires low cooling efficiency, ensures reliable operation, and allows for long-term trouble-free operation. It is particularly suitable for wind power generation, hydropower generation, and other fields, effectively meeting practical work requirements and saving electricity costs. Attached Figure Description

[0025] The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the superconducting generator unit of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the driving component of the present invention.

[0029] Figure reference numerals: a-Combined power supply, b-Fully superconducting motor, c-Semi-superconducting motor, 1-Motor housing, 2-Stator core, 3-Stator superconducting winding, 4-Shaft, 5-Rotor core, 6-Rotor superconducting winding, 7-Drive assembly, 701-Gear ring, 702-Driving gear, 703-Driven gear, 8-Connecting plate, 9-Refrigerant container, 10-Refrigeration unit, 11-Refrigerant inlet pipe, 12-Refrigerant outlet pipe, 13-Cryogenic circulating pump, 14-Slider. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example:

[0032] See Figure 1 and Figure 2This embodiment provides a series superconducting motor assembly, including four superconducting motor units and a combined power supply a. Each superconducting motor unit includes a fully superconducting motor b and a semi-superconducting motor c. The output shafts of the fully superconducting motor b and the semi-superconducting motor c are connected via a three-jaw chuck. The fully superconducting motor b and the semi-superconducting motor c are connected in series to the combined power supply a to form the superconducting motor assembly. The fully superconducting motor b includes a motor housing 1, a stator, a rotor, and a cryogenic cooling system, designed to improve the motor's efficiency and performance. The motor housing 1 is cylindrical and maintains an internal vacuum state with a vacuum level range of 0.05 MPa, which helps to reduce... To reduce heat conduction and gas friction losses and improve the cooling efficiency of the superconducting motor, the stator includes a stator core 2 and several stator superconducting windings 3 spaced apart on the stator core 2. A set of sliders 14 are arranged in a ring on the outer side wall of the stator core 2. The inner side wall of the motor housing 1 is provided with sliding grooves that cooperate with these sliders 14, so that the stator core 2 can rotate within the motor housing 1. The rotor includes a rotating shaft 4, a rotor core 5 and several rotor superconducting windings 6 spaced apart on the rotor core 5. The rotating shaft 4 passes through the motor housing 1 and is rotatably connected to the motor housing 1, while the rotor core 5 is fixedly sleeved on the rotating shaft 4. A drive assembly 7 is mounted on the rotating shaft 4, and its output end is driven by the stator core 2, enabling the stator core 2 to rotate relative to the rotor core 5. The cryogenic cooling system is used to cool the stator superconducting winding 3 and the rotor superconducting winding 6, ensuring their operation in a superconducting state. The difference between the semi-superconducting motor c and the fully superconducting motor b is that the winding material is copper wire winding. Specifically, this superconducting motor has undergone structural innovation and optimization to reduce the losses of the stator superconducting winding 3 and the rotor superconducting winding 6, reduce the reactive power of the motor, and improve the overall working efficiency and performance. Its application range is wide, including wind power generation, hydropower generation, and other fields. In actual working needs, it can save electricity costs and has more reliable and longer operating performance. The innovation of this embodiment lies in the optimization of the structural design, such as the use of a vacuum-state motor housing 1, the matching design of the slider 14 and the groove, and the transmission matching between the drive assembly 7 and the stator core 2. These designs all contribute to improving the performance and stability of the motor. In addition, by keeping the superconducting windings of the stator and rotor in a low-temperature environment through a cryogenic cooling system, energy loss is effectively reduced, the operating efficiency of the motor is improved, various practical working requirements can be met, and it plays an important role in fields such as wind power generation and hydropower generation, contributing to energy conservation, emission reduction and sustainable development.

[0033] In this embodiment, both the stator superconducting winding 3 and the rotor superconducting winding 6 are wound with Bi-2223 / Ag high-temperature superconducting wire and wound into a racetrack-shaped structure. This structure is closest in shape to a rectangular coil, and the ends of the coil have rounded transitions to avoid very small bending radii. The superconducting winding involved in this invention adopts a concentrated winding scheme, so that each winding coil can use a racetrack-shaped coil and there will be no spatial interference between the coil ends.

[0034] In this embodiment, refer to Figure 2 The drive assembly 7 includes a gear ring 701, a drive gear 702, and a driven gear 703. The gear ring 701 is connected to one end of the stator core 2. The drive gear 702 is fixedly sleeved on the rotating shaft 4. The driven gear 703 is rotatably mounted on the motor housing 1. Both the gear ring 701 and the drive gear 702 mesh with the driven gear 703. Specifically, when the superconducting motor shaft 4 is driven, the shaft 4 drives the drive gear 702 to rotate, the drive gear 702 drives the driven gear 703 to rotate, and the driven gear 703 drives the gear ring 701 to rotate. This causes the rotation direction of the gear ring 701 to be opposite to the rotation direction of the drive gear 702. Since the gear ring 701 is connected to one end of the stator core 2, it drives the stator core 2 to rotate. That is, during operation, the stator core 2 and the rotor core 5 rotate relative to each other, which accelerates the change rate of the magnetic field of the stator and rotor, thereby increasing the power generation and efficiency.

[0035] In this embodiment, refer to Figure 3 It also includes a triangular connecting plate 8, which is fixedly connected to the motor housing 1. The rotating shaft 4 passes through the connecting plate 8 and is rotatably connected to it. Three driven gears 703 are arranged in a ring on the connecting plate 8, and each driven gear 703 is rotatably connected to the connecting plate 8. Specifically, driven by the driving gear 702, by increasing the number of driven gears 703, the drive of the gear ring 701 can be made smoother, thereby ensuring the stability of the relative motion between the stator and rotor, enabling long-term trouble-free operation, which is beneficial to use.

[0036] In this embodiment, refer to Figure 2The cryogenic cooling system includes a refrigerant container 9, a refrigerator 10, a refrigerant inlet pipe 11, a refrigerant outlet pipe 12, and a cryogenic circulation pump 13. The refrigerant is liquid nitrogen. The refrigerant container 9 and the refrigerator 10 are connected. The two ends of the refrigerant inlet pipe 11 are connected to the refrigerator 10 and the motor housing 1, respectively. One end of the refrigerant outlet pipe 12 is connected to the bottom of the motor housing 1, and the other end is connected to the cryogenic circulation pump 13. The cryogenic circulation pump 13 is connected to the refrigerant container 9. Specifically, liquid nitrogen is introduced into the motor housing 1 through the refrigerant inlet pipe 11. The liquid nitrogen inside the motor housing 1 provides contact cooling to the superconducting materials of the stator superconducting winding 3 and the rotor superconducting winding 6. The liquid nitrogen is then recycled through the refrigerant outlet pipe 12 and the cryogenic circulation pump 13, ensuring that the superconducting materials operate in a low-temperature environment. Utilizing the special properties of superconducting materials, such as zero resistance and complete repulsion of external magnetic fields, the losses of the superconducting windings are reduced. Meanwhile, the permanent magnet materials of the stator core 2 and the rotor core 5 also exhibit very low losses in a low-temperature environment. This low-temperature environment also helps improve the working performance and stability of the permanent magnet materials. This invention utilizes the special properties of superconducting materials, such as zero resistance and complete repulsion of external magnetic fields, to obtain a superconducting motor structure with high power and low losses, significantly improving the power-to-weight ratio of the superconducting motor.

[0037] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A series superconducting motor assembly, characterized in that, The system includes multiple superconducting motor units and a combined power supply (a). Each superconducting motor unit comprises a fully superconducting motor (b) and a semi-superconducting motor (c). The output shafts of the fully superconducting motor (b) and the semi-superconducting motor (c) are connected via a three-jaw chuck. The fully superconducting motor (b) and the semi-superconducting motor (c) are connected in series to the combined power supply (a) to form a superconducting motor assembly. The fully superconducting motor (b) includes a motor housing (1), a stator, a rotor, and a cryogenic cooling system. The motor housing (1) is in a vacuum state. The stator includes a stator core (2) and multiple stator superconducting windings (3) spaced apart on the stator core (2). The stator core (2) is rotatably mounted inside the motor housing (1). The rotor includes a rotating shaft (4), a rotor core (5), and multiple rotor superconducting windings (6) spaced apart on the rotor core (5). The rotating shaft (4) passes through the motor housing (1) and is rotatably connected to the motor housing (1). The rotor core (5) is fixedly sleeved on the rotating shaft (4). A drive assembly (7) is provided on the rotating shaft (4). The output end of the drive assembly (7) is driven and cooperates with the stator core (2) and can drive the stator core (2) to rotate relative to the rotor core (5). The cryogenic cooling system is used to cool the stator superconducting winding (3) and the rotor superconducting winding (6). The difference between the structure of the semi-superconducting motor (c) and the fully superconducting motor (b) is that the winding material is copper wire winding.

2. The series superconducting motor assembly according to claim 1, characterized in that, The drive assembly (7) includes a gear ring (701), a drive gear (702), and a driven gear (703). The gear ring (701) is connected to one end of the stator core (2). The drive gear (702) is fixedly sleeved on the rotating shaft (4). The driven gear (703) is rotatably mounted on the motor housing (1). Both the gear ring (701) and the drive gear (702) mesh with the driven gear (703).

3. The series superconducting motor assembly according to claim 2, characterized in that, It also includes a connecting plate (8), which is fixedly connected to the motor housing (1). The rotating shaft (4) passes through the connecting plate (8) and is rotatably connected to the connecting plate (8). Multiple driven gears (703) are provided and arranged in a ring on the connecting plate (8). All driven gears (703) are rotatably connected to the connecting plate (8).

4. A series superconducting motor assembly according to any one of claims 1-3, characterized in that, The cryogenic cooling system includes a refrigerant container (9), a refrigerator (10), a refrigerant inlet pipe (11), a refrigerant outlet pipe (12), and a cryogenic circulating pump (13). The refrigerant container (9) and the refrigerator (10) are connected. The two ends of the refrigerant inlet pipe (11) are connected to the refrigerator (10) and the motor housing (1), respectively. One end of the refrigerant outlet pipe (12) is connected to the bottom of the motor housing (1), and the other end is connected to the cryogenic circulating pump (13). The cryogenic circulating pump (13) is connected to the refrigerant container (9).

5. A series superconducting motor assembly according to claim 4, characterized in that, The refrigerant used is one of cold helium, liquid neon, and liquid nitrogen.

6. The series superconducting motor assembly according to claim 1, characterized in that, Multiple sliders (14) are arranged in a ring on the outer side wall of the stator core (2), and a sliding groove is provided on the inner side wall of the motor housing (1) to cooperate with the sliders (14), and the sliders (14) are located in the sliding groove.

7. The series superconducting motor assembly according to claim 1, characterized in that, Both the stator superconducting winding (3) and the rotor superconducting winding (6) are made of high-temperature superconducting wire.

8. The series superconducting motor assembly according to claim 7, characterized in that, The high-temperature superconducting wire is either a Bi-2223 / Ag high-temperature superconducting wire or a Bi-2212 / Ag high-temperature superconducting wire.

9. A series superconducting motor assembly according to claim 1, characterized in that, The stator superconducting winding (3) and the rotor superconducting winding (6) are both racetrack-shaped, elliptical, or rectangular.

10. A series superconducting motor assembly according to claim 1, characterized in that, The shape of the motor housing (1) is one of cylindrical, cubic and cuboid, and the vacuum degree inside the motor housing (1) is in the range of 10Pa to 0.1MPa.

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