CN114421717A - Distributed high-temperature superconducting armature motor with active magnetic shielding function - Google Patents
Distributed high-temperature superconducting armature motor with active magnetic shielding function Download PDFInfo
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- CN114421717A CN114421717A CN202210093529.7A CN202210093529A CN114421717A CN 114421717 A CN114421717 A CN 114421717A CN 202210093529 A CN202210093529 A CN 202210093529A CN 114421717 A CN114421717 A CN 114421717A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
- H02K11/014—Shields associated with stationary parts, e.g. stator cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/04—Cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K55/00—Dynamo-electric machines having windings operating at cryogenic temperatures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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Abstract
The invention discloses a distributed high-temperature superconducting armature motor with an active magnetic shielding function, which comprises a stator core, a rotor core, a Dewar superconducting magnet and a permanent magnet. The stator comprises a stator core and a single Dewar type superconducting magnet which surrounds a stator yoke, the single Dewar type superconducting magnet consists of a double-layer Dewar type, a superconducting coil and a superconducting shielding layer, the superconducting coil and the superconducting shielding layer are jointly arranged inside the double-layer Dewar type, the superconducting shielding layer is arranged on the periphery of the superconducting coil and is separated by a partition plate, and the superconducting shielding layer is arranged at a stator slot. The motor combines superconducting materials, a magnetic field modulation theory and a permanent magnet motor technology, utilizes complete diamagnetism of the superconducting materials to manufacture a superconducting shielding layer which is arranged outside a superconducting coil to protect the superconducting coil from the influence of an internal harmonic magnetic field of a motor, thereby ensuring the current carrying capacity of the superconducting coil and reducing the alternating current loss of the superconducting coil.
Description
Technical Field
The invention relates to a distributed high-temperature superconducting armature motor adopting an active magnetic shielding measure, and belongs to the technical field of motors.
Background
With the rapid development of offshore wind power, the single-machine capacity of an offshore wind turbine breaks through 10 MW. The wind driven generator is used as a core device of an offshore wind power generation unit and plays a significant role in offshore wind power development. The permanent magnet direct-drive wind generating set is a mainstream model in the current offshore wind power. However, the permanent magnet direct-drive generator usually works in an ultra-low speed state of several to ten and several revolutions per minute, the size and the weight of the motor are huge, the design, the manufacture, the transportation and the installation difficulty of the generator are increased, and the tower footing construction is also provided with a serious challenge. High-capacity high-power-density offshore wind power generators are a great demand in the development of current offshore wind power.
The high-temperature superconducting motor uses the high-temperature superconducting coil to replace a copper coil to manufacture an excitation winding or an armature winding, can have higher magnetic load or electric load in a limited space, has higher power density than a permanent magnet motor, and is a research hotspot in the field of the current motor. Although some megawatt superconducting excitation synchronous motor prototypes are developed, the problems of brushless transmission of excitation current and static sealing of cooling liquid of the superconducting motors are prominent, and further development of the superconducting motors is restricted. If the superconducting field coils are arranged on the stator side, the armature currents on the rotor side still need to be fed using brushes and slip rings, although a static seal of the cooling fluid can be achieved. The superconducting coil can be used as an excitation winding and an armature winding, and the armature winding is positioned on the stator side and can also realize static sealing of cooling liquid. However, when the excitation magnetic field acts on the superconducting armature winding, on one hand, the current carrying capacity of the superconducting armature winding is inhibited, and on the other hand, the alternating current loss of the superconducting armature winding is increased, so that how to realize the effective magnetic shielding of the superconducting armature winding is the key to realize the application of the superconducting motor.
Aiming at the great demand of offshore wind power on a high-capacity high-power-density high-temperature superconducting motor and the technical problem of the current superconducting motor, the invention provides a distributed high-temperature superconducting armature motor with an active magnetic shielding function by fully combining superconducting materials, a magnetic field modulation theory and a permanent magnet motor technology. The motor utilizes complete diamagnetism of superconducting materials to manufacture a superconducting shielding layer which is arranged outside a superconducting coil to protect the superconducting coil from the influence of a harmonic magnetic field inside a motor, thereby ensuring the current carrying capacity of the superconducting coil and reducing the alternating current loss of the superconducting coil. Meanwhile, the superconducting coil is arranged on the stator side and used as an armature winding, static sealing of cooling liquid can be achieved, high-performance permanent magnets are used for excitation, and brushless excitation can be achieved by arranging the superconducting coil on the rotor side. Meanwhile, the motor operates based on a magnetic field modulation theory, the number of pole pairs of an armature reaction magnetic field is unequal to that of an excitation magnetic field, and the speed-increasing operation of a harmonic magnetic field can be realized by utilizing a self-speed-increasing principle of a magnetic gear effect, so that the power density of the motor is further improved. The motor has obvious advantages and bright application prospect.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a distributed high-temperature superconducting armature motor with an active magnetic shielding function, which utilizes complete diamagnetism of superconducting materials to construct a superconducting shielding layer, weakens the negative effect of an excitation magnetic field on a superconducting armature winding, ensures the current carrying capacity of the superconducting armature winding, can realize static sealing and motor brushless of a low-temperature cooling system, and overcomes the problems existing in the prior rotor superconducting excitation motor and stator superconducting armature motor.
The technical scheme is as follows: the invention provides a distributed high-temperature superconducting armature motor with an active magnetic shielding function, which comprises a rotating shaft, a rotor core, a stator core, a permanent magnet and a Dewar superconducting magnet, wherein the rotating shaft is provided with a magnetic core;
the rotating shaft, the rotor iron core and the stator iron core are coaxial and are arranged in sequence from inside to outside; the rotor core is provided with a magnetic isolation hole and is positioned in the stator core; the permanent magnet is positioned between the stator iron core and the rotor iron core, is attached to the surface of the rotor iron core or is embedded in the rotor iron core; the permanent magnet is a tile-shaped permanent magnet, and the shape, size, position and the like of the permanent magnet can be designed according to requirements.
The Dewar type superconducting magnet is provided with a through hole structure, a superconducting coil and a superconducting shielding layer are arranged in the Dewar type superconducting magnet, and the superconducting coil and the superconducting shielding layer are arranged around the through hole structure;
the Dewar type superconducting magnet is positioned in the stator slot of the stator core and sleeved on the stator core, and one Dewar type superconducting magnet is correspondingly arranged in each stator slot. The superconducting shielding layer in the Dewar superconducting magnet is positioned at the stator slot opening and sleeved on the stator iron core, the diffusion of an air gap magnetic field to the stator slot can be blocked, the Dewar superconducting magnet has excellent magnetic insulation property, and the Dewar superconducting magnet and the stator teeth can form a high-performance magnetic field modulator with magnetic insulation materials and magnetic conduction materials arranged at intervals.
The superconducting shielding layer has complete diamagnetism, and has the functions of shielding the negative influence of the magnetic field inside the motor on the superconducting coil and ensuring the current carrying capacity of the superconducting coil.
Further, the stator core and the rotor core can be arranged from left to right to form an axial disk type motor, and can be arranged from top to bottom to form a linear motor.
Further, the stator core comprises a plurality of stator core units, and the plurality of stator core units are sequentially connected to form a circumferential structure; the stator core unit comprises a stator yoke and stator teeth, the stator yoke is of a sector ring structure, the stator teeth are arranged on the inner circular arc of the sector ring structure, the stator teeth face to the circle center of the stator yoke, and the circle center is positioned on the rotating shaft; the stator yoke penetrates through a through hole structure of the Dewar superconducting magnet, and the Dewar superconducting magnet is sleeved on the stator yoke.
Furthermore, superconducting coils of the Dewar superconducting magnet are connected to form a distributed armature winding, and the number of pole pairs of the armature winding is PsThe number of pole pairs of the rotor permanent magnet is PrThe number of teeth of the stator being PcAnd the three satisfy the relation: pc＝Ps+Pr。
Specifically, the superconducting coils can form a three-phase symmetrical distributed type integral distance armature winding through connection.
Furthermore, the Dewar superconducting magnet also comprises an outer Dewar, an inner Dewar and a cooling liquid flow pipe, wherein the inner Dewar and the outer Dewar are of single-layer structures;
the inner Dewar is positioned in the outer Dewar, the through hole structure is positioned in the centers of the outer Dewar and the inner Dewar, and the outer Dewar and the inner Dewar are fixed through a Dewar support frame; the outer Dewar and the inner Dewar are in a vacuum state; the cooling liquid flow pipe passes through the outer Dewar and is communicated with the inner Dewar. The superconducting coil and the superconducting shielding layer are soaked in low-temperature liquid nitrogen in the inner Dewar to keep superconductivity.
Further, the Dewar superconducting magnet also comprises an evacuation pipeline; the evacuation pipeline is connected with the outer Dewar and used for evacuating air between the outer Dewar and the inner Dewar to form a vacuum state.
Furthermore, the number of the cooling liquid flow pipes is two, and the two cooling liquid flow pipes are respectively used for flowing cooling liquid into and out of the inner Dewar;
a cooling liquid partition plate is further arranged in the inner Dewar, a cooling liquid inflow channel is formed on one side of the cooling liquid partition plate, a cooling liquid outflow channel is formed on the other side of the cooling liquid partition plate, and the two cooling liquid flow pipes are respectively connected with the cooling liquid inflow channel and the cooling liquid outflow channel; the superconducting shielding layer is of a runway-shaped structure with an opening at one end, and the cooling liquid partition plate penetrates through the opening of the superconducting shielding layer.
Furthermore, the superconducting coil is fixed in the inner Dewar through a superconducting coil support frame, the superconducting shielding layer is fixed in the inner Dewar through a superconducting shielding layer support frame, the superconducting coil is positioned in the superconducting shielding layer, and partition plates are discontinuously arranged between the superconducting coil and the superconducting shielding layer. The superconducting coil and the superconducting shielding layer can be made of high-temperature superconducting materials or low-temperature superconducting materials, and the superconducting shielding layer can be formed by laminating superconducting tapes or superconducting blocks formed by pressing superconducting powder.
Furthermore, the Dewar superconducting magnet also comprises a current lead pipe, and the current lead pipe is connected with the cooling liquid flow pipe through a three-way pipeline.
Has the advantages that:
compared with the existing superconducting motor, the superconducting motor has the following advantages:
(1) by utilizing the complete diamagnetism of the superconducting material and designing the superconducting shielding layer, the negative influence of various harmonic magnetic fields in the motor on the superconducting coil can be shielded, namely a high-frequency magnetic field can be shielded, a low-frequency magnetic field can be shielded, a constant magnetic field can be shielded, and the current carrying capacity of the superconducting coil can be ensured.
(2) The superconducting coil is positioned on the stator side, so that the static sealing of the cooling liquid is realized, and the brushless motor is realized by applying the excitation of the high-performance permanent magnet.
(3) The superconducting shielding layer and the superconducting coil are arranged in the same Dewar together for integrated design, and share one set of low-temperature cooling system, so that the design difficulty of the low-temperature cooling system of the motor is reduced.
(4) The superconducting shielding layer is positioned at the position of a stator slot, has extremely strong magnetism isolating performance, can block air gap magnetic flux from diffusing into the stator slot, can form a high-performance magnetic field modulator of 'stator tooth (magnetic conduction) -superconducting shielding layer (magnetic resistance) -stator tooth (magnetic conduction)' with the stator tooth, and utilizes the self-acceleration effect of a magnetic field to improve the power density of the motor.
(5) The superconducting shielding layer is used for blocking the air gap magnetism from leading to the slot to be diffused, so that the utilization rate of air gap magnetic flux is improved, and the power factor of the motor is improved.
(6) The superconducting magnet is wound on the stator yoke, and the superconducting coils are connected externally to form a three-phase symmetrical full-distance distributed armature winding, so that the defects that a superconducting wire is not easy to bend and is not easy to make into a long-span and end-part-laminated distributed winding are overcome.
(7) The improved temperature superconducting motor is convenient for modularized manufacture, and the modularized superconducting magnet, the modularized stator and the modularized rotor are beneficial to manufacture, transportation and installation of a large-capacity motor.
Drawings
FIG. 1 is a two-dimensional schematic view of the motor of the present invention;
FIG. 2 is a schematic diagram of a Dewar superconducting magnet of the present invention electrical machine;
FIG. 3 is a schematic view of a single segment stator core of the electric machine of the present invention;
FIG. 4 is a schematic view of a stator module formed of a single stator core and superconducting coils of the electric machine of the present invention;
fig. 5 is a schematic view of a complete stator assembled from 12 stator modules of the electric machine of the present invention;
fig. 6 is a schematic view of a motor of the present invention with 12 single-segment stator cores assembled into a stator core;
FIG. 7 is a schematic diagram of the no-load back emf waveform of the armature winding of the motor of the present invention during steady state operation;
FIG. 8 is a schematic illustration of the electromagnetic torque waveform of the motor of the present invention during steady state operation;
wherein: 1. a current lead tube; 2. a coolant flow tube; 3. evacuating the pipeline; 4. an outer dewar; 5. an inner dewar; 6. a superconducting coil; 7. a coolant partition; 8. a superconducting shielding layer; 9. a superconducting coil support frame; 10. a superconducting shielding layer support frame; 11. a Dewar support frame; 12. a three-way pipeline;
13. a stator core; 131. a stator yoke; 132. stator teeth; 14. a rotor core; 141. a magnetism isolating hole; 15. a permanent magnet; 16. a dewar superconducting magnet; 17. a rotating shaft.
Detailed Description
As shown in fig. 1, the distributed high-temperature superconducting armature motor with an active magnetic shielding function according to the present invention includes a rotating shaft 17, a stator core 13, a rotor core 14, a permanent magnet 15, and a dewar superconducting magnet 16.
The rotating shaft 17, the rotor core 14 and the stator core 13 are coaxial and are sequentially arranged from inside to outside; the rotor core 14 is positioned inside the stator core 13; the rotor iron core 14 is provided with a magnetism isolating hole 141, and the permanent magnet 15 is positioned between the stator iron core and the rotor iron and attached to the surface of the rotor iron core 14; the permanent magnet 15 is a tile-shaped permanent magnet, and as shown in fig. 1, twenty-two tile-shaped permanent magnets are arranged on the rotor core 14 of the present invention, and the number of pairs of excitation poles is eleven.
A through hole structure is formed in the Dewar type superconducting magnet 16, a superconducting coil 6 and a superconducting shielding layer 8 are arranged in the Dewar type superconducting magnet 16, and the superconducting coil 6 and the superconducting shielding layer 8 are arranged around the through hole structure;
the Dewar superconducting magnet 16 is positioned in a stator slot of the stator core 13 and sleeved on the stator core 13, so that the superconducting coil 6 and the superconducting shielding layer 8 also surround the stator core 13; a dewar superconducting magnet 16 is correspondingly disposed in each stator slot.
The stator core 13 includes a plurality of stator core units, and as shown in fig. 6, the plurality of stator core units are sequentially connected to form a circumferential structure. The stator core unit comprises a stator yoke 131 and stator teeth 132, the stator yoke 131 is of a sector ring structure, the stator teeth 132 are arranged on the inner circular arc of the sector ring structure, the stator teeth 132 face to the center of the stator yoke 131, and the center of the circle is located on the rotating shaft 17; the outer circular arc of the fan ring structure is also provided with an inverted trapezoidal bulge which is clamped and positioned with an external shell when the whole machine is assembled.
The stator yoke 131 penetrates through the through hole structure of the Dewar superconducting magnet 16, and the Dewar superconducting magnet 16 is sleeved on the stator yoke 131; as shown in fig. 4, each stator core unit is sleeved with a dewar superconducting magnet 16.
As shown in fig. 1, the stator core 13 of the present invention includes twelve stator core units, the number of the dewar superconducting magnets 16 is the same as that of the stator core units, stator slots are formed between adjacent stator teeth 132 on the stator core 13, the dewar superconducting magnets 16 are located in the stator slots and are sleeved on the stator yoke 131, and the superconducting coils 6 and the superconducting shielding layers 8 in the dewar superconducting magnets 16 are also located in the stator slots and surround the stator yoke 131.
As shown in fig. 2, the dewar superconducting magnet 16 further includes an outer dewar 4, an inner dewar 5, a cooling liquid flow tube 2, a current lead tube 1 and an evacuation pipe 3, wherein the inner dewar and the outer dewar are of a single-layer structure.
The evacuation pipeline 3 is connected with the outer Dewar 4 and used for evacuating air between the outer Dewar 4 and the inner Dewar 5 to ensure high vacuum degree between the inner Dewar and the outer Dewar, and multiple layers of heat insulating materials can be filled between the outer Dewar 4 and the inner Dewar 5 to ensure the constant temperature performance inside the inner Dewar 5.
The runway-shaped through hole structure is positioned at the centers of the outer dewar 4 and the inner dewar 5, and the outer dewar 4 and the inner dewar 5 are fixed through a dewar supporting frame 11.
Two cooling liquid flow pipes 2 are arranged at one ends of an outer Dewar 4 and an inner Dewar 5 and used for enabling cooling liquid to flow into and out of the inner Dewar 5, the cooling liquid flow pipes 2 penetrate through the outer Dewar 4 to be communicated with the inner Dewar 5, a cooling liquid partition plate 7 is arranged in the inner Dewar 5, a cooling liquid inflow channel is formed on one side of the cooling liquid partition plate 7, a cooling liquid outflow channel is formed on the other side of the cooling liquid partition plate 7, the two cooling liquid flow pipes 2 are respectively connected with the cooling liquid inflow channel and the cooling liquid outflow channel, so that the cooling liquid enters the cooling liquid inflow channel through one cooling liquid flow pipe 2, and flows out through the cooling liquid outflow channel and the other cooling liquid flow pipe 2 after circulating around a through hole structure in the inner Dewar 5 for a circle, and then the cooling liquid can flow out after flowing through the circle in the inner Dewar 5, and the superconducting coil 6 and the superconducting shielding layer 8 are fully cooled.
The superconducting coil 6 and the superconducting shielding layer 8 are both positioned in the inner Dewar 5, are both in a runway-shaped structure and are arranged in parallel around the runway-shaped through hole. The superconducting coil 6 is fixed in the inner Dewar 5 through a superconducting coil support frame 9, the superconducting shielding layer 8 is also fixed in the inner Dewar 5 through a superconducting shielding layer support frame 10, the superconducting coil 6 is positioned in the superconducting shielding layer 8, and a partition plate is discontinuously arranged between the superconducting coil 6 and the superconducting shielding layer 8 to facilitate the installation and fixation of the superconducting coil 6 and the superconducting shielding layer 8; the superconducting shielding layer 8 is a track-shaped structure with an opening at one end, and the cooling liquid partition 7 is positioned in the opening of the superconducting shielding layer 8.
The number of the current lead pipes 1 is two, the two current lead pipes 1 are respectively connected with the two cooling liquid flow pipes 2 through the three-way pipeline 12, and the current lead pipes 1 are used for leading in and leading out current in the superconducting coil 6. The external part is connected with the superconducting coil 6 through the current lead tube 1 to form a distributed armature winding, the invention forms a three-phase symmetrical single-layer annular integer-pitch distributed armature winding with 2 slots per phase per pole and 1 pole pair number. However, the motor is designed and optimized in any way, and the number of pole pairs of the armature winding is PsThe number of pole pairs of the rotor permanent magnet is PrThe number of teeth of the stator being PcThe three must satisfy the relationship: pc＝Ps+Pr。
In the present invention, since the superconducting coil is poor in mechanical bending property and cannot be bent as desired as a copper wire, the dewar superconducting magnet 16 is wound around the stator yoke 131 so that the superconducting coil constitutes a distributed armature winding. For the convenience of installation of the Dewar superconducting magnet 16, the specific installation steps are as follows: firstly, a dewar superconducting magnet 16 is sleeved on the stator core units shown in fig. 3, as shown in fig. 4, and the process is repeated, and finally, twelve stator core units are spliced together to form a complete stator core 13, as shown in fig. 5. FIG. 7 is a schematic diagram of the no-load back emf waveform of the armature winding during steady state operation of the motor of the present invention; FIG. 8 is a schematic diagram of the electromagnetic torque waveform of the motor of the present invention during steady state operation;
the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.
Claims (10)
1. A distributed high-temperature superconducting armature motor with an active magnetic shielding function is characterized by comprising a rotating shaft (17), a stator iron core (13), a rotor iron core (14), a permanent magnet (15) and a Dewar superconducting magnet (16); the rotating shaft (17), the rotor iron core (14) and the stator iron core (13) are coaxial and are sequentially arranged from inside to outside; the rotor core (14) is positioned in the stator core (13); the permanent magnet (15) is positioned between the stator iron core (13) and the rotor iron;
a through hole structure is formed in the Dewar type superconducting magnet (16), a superconducting coil (6) and a superconducting shielding layer (8) are arranged in the Dewar type superconducting magnet (16), and the superconducting coil (6) and the superconducting shielding layer (8) are arranged around the through hole structure; the Dewar superconducting magnet (16) is positioned in a stator slot of the stator core (13) and sleeved on the stator core (13), and one Dewar superconducting magnet (16) is correspondingly arranged in each stator slot; the superconducting shielding layer (8) is positioned at the slot opening of the stator and used for blocking the diffusion of the air gap magnetic field into the stator slot.
2. A distributed high temperature superconducting armature machine with active magnetic shielding function according to claim 1, characterized in that the stator core (13) comprises a plurality of stator core units, which are connected in sequence to form a circumferential structure;
the stator core unit comprises a stator yoke (131) and stator teeth (132), the stator yoke (131) is of a sector ring structure, the inner circular arc of the sector ring structure is provided with the stator teeth (132), the stator teeth (132) face to the circle center of the stator yoke (131), and the circle center is positioned on the rotating shaft (17);
the stator yoke (131) penetrates through a through hole structure of the Dewar superconducting magnet (16), the Dewar superconducting magnet (16) is sleeved on the stator yoke (131), and the superconducting shielding layer (8) and the stator teeth form a magnetic field modulator with magnetic insulating materials and magnetic conducting materials arranged at intervals.
3. The distributed high-temperature superconducting armature motor with the active magnetic shielding function according to claim 1, wherein the rotor core (14) is provided with magnetic isolation holes (141).
4. A distributed hts armature machine with active magnetic shielding function according to claim 1, characterized in that the permanent magnets (15) are tile-shaped permanent magnets.
5. A distributed hts armature machine with active magnetic shielding function according to claim 1, characterized in that the superconducting coils (6) of the dewar superconducting magnet (16) are connected to form a three-phase symmetric distributed full-pitch armature winding, the number of pole pairs of which is PsThe number of pole pairs of the rotor permanent magnet is PrThe number of teeth of the stator being PcAnd the three satisfy the relation: pc＝Ps+Pr。
6. A distributed high temperature superconducting armature machine with active magnetic shielding function according to claim 1, characterized in that the dewar superconducting magnet (16) further comprises an outer dewar (4), an inner dewar (5) and a cooling liquid flow pipe (2);
the inner Dewar (5) is positioned in the outer Dewar (4), the through hole structure is positioned at the centers of the outer Dewar (4) and the inner Dewar (5), and the outer Dewar (4) and the inner Dewar (5) are fixed through a Dewar support frame (11); the space between the outer Dewar (4) and the inner Dewar (5) is in vacuum state; the cooling liquid flow pipe (2) passes through the outer Dewar (4) and is communicated with the inner Dewar (5).
7. A distributed high temperature superconducting armature machine with active magnetic shielding function according to claim 6, characterized in that the Dewar superconducting magnet (16) further comprises an evacuation pipe (3);
the evacuation pipe (3) is connected with the outer dewar (4) and is used for evacuating air between the outer dewar (4) and the inner dewar (5).
8. A distributed HTS armature machine with active magnetic shielding, according to claim 6, characterized in that said coolant flow tubes (2) are two for the coolant flow into and out of said inner Dewar (5), respectively;
a cooling liquid partition plate (7) is also arranged in the inner Dewar (5), a cooling liquid inflow channel is formed on one side of the cooling liquid partition plate (7), a cooling liquid outflow channel is formed on the other side of the cooling liquid partition plate (7), two cooling liquid flow pipes (2) are respectively connected with the cooling liquid inflow channel and the cooling liquid outflow channel,
the superconducting shielding layer (8) is of a runway-shaped structure with an opening at one end, and the cooling liquid partition plate (7) penetrates through the opening of the superconducting shielding layer (8).
9. A distributed high-temperature superconducting armature motor with an active magnetic shielding function according to claim 6, characterized in that the superconducting coil (6) is fixed in the inner Dewar (5) through a superconducting coil support frame (9), the superconducting shielding layer (8) is fixed in the inner Dewar (5) through a superconducting shielding layer support frame (10), the superconducting coil (6) is positioned in the superconducting shielding layer (8), and a partition plate is discontinuously arranged between the superconducting coil (6) and the superconducting shielding layer (8).
10. A distributed high temperature superconducting armature machine with active magnetic shielding function according to claim 1, characterized in that the dewar superconducting magnet (16) further comprises a current lead pipe (1), and the current lead pipe (1) is connected with the cooling liquid flow pipe (2) through a tee pipeline (12).
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| CN202210093529.7A CN114421717B (en) | 2022-01-26 | 2022-01-26 | Distributed high-temperature superconducting armature motor with active magnetic shielding function |
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| CN114421717B CN114421717B (en) | 2023-05-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024049403A1 (en) * | 2022-08-29 | 2024-03-07 | General Electric Renovables España, S.L. | Cooling system for a superconducting generator |
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| CN102997037A (en) * | 2011-09-19 | 2013-03-27 | 北京云电英纳超导电缆有限公司 | Dewar with magnetic shielding or electromagnetic shielding |
| CN103825387A (en) * | 2013-10-09 | 2014-05-28 | 中国石油大学(华东) | High-temperature superconductive excitation magnetic flux switch motor low-temperature cooling system |
| CN107707090A (en) * | 2017-09-25 | 2018-02-16 | 东南大学 | Bimorph transducer superconduction brushless dual-feedback wind power generator |
| CN110518781A (en) * | 2019-08-08 | 2019-11-29 | 东南大学 | Modulate the screen method of armature-reaction in superconducting motor in a kind of bimorph transducer field |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024049403A1 (en) * | 2022-08-29 | 2024-03-07 | General Electric Renovables España, S.L. | Cooling system for a superconducting generator |
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