CN114421717B - 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 PDF

Info

Publication number
CN114421717B
CN114421717B CN202210093529.7A CN202210093529A CN114421717B CN 114421717 B CN114421717 B CN 114421717B CN 202210093529 A CN202210093529 A CN 202210093529A CN 114421717 B CN114421717 B CN 114421717B
Authority
CN
China
Prior art keywords
superconducting
dewar
stator
shielding layer
cooling liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210093529.7A
Other languages
Chinese (zh)
Other versions
CN114421717A (en
Inventor
朱新凯
齐广宇
周晔
黄吉伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North China Electric Power University
Original Assignee
North China Electric Power University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by North China Electric Power University filed Critical North China Electric Power University
Priority to CN202210093529.7A priority Critical patent/CN114421717B/en
Publication of CN114421717A publication Critical patent/CN114421717A/en
Application granted granted Critical
Publication of CN114421717B publication Critical patent/CN114421717B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Superconductive Dynamoelectric Machines (AREA)

Abstract

The invention discloses a distributed high-temperature superconducting armature motor with an active magnetic shielding function. The stator comprises a stator iron core and a single Dewar superconducting magnet which surrounds the stator yoke, wherein the single Dewar superconducting magnet consists of a double-layer Dewar, a superconducting coil and a superconducting shielding layer, the superconducting coil and the superconducting shielding layer are jointly arranged in the double-layer Dewar, the superconducting shielding layer is arranged on the periphery of the superconducting coil, the superconducting coil and the superconducting shielding layer are separated by a partition plate, and the superconducting shielding layer is arranged at a notch of the stator. The motor combines superconducting materials, a magnetic field modulation theory and a permanent magnet motor technology, utilizes the complete diamagnetism of the superconducting materials to manufacture a superconducting shielding layer, is arranged on the outer side of a superconducting coil, and protects the superconducting coil from being influenced by an internal harmonic magnetic field of the motor, so that the current carrying capacity of the superconducting coil is ensured, and the alternating current loss of the superconducting coil is reduced.

Description

Distributed high-temperature superconducting armature motor with active magnetic shielding function
Technical Field
The invention relates to a distributed high-temperature superconductive armature motor adopting an active magnetic shielding measure, belonging to the technical field of motors.
Background
With the rapid development of offshore wind power, the single-machine capacity of an offshore wind turbine has broken through by 10MW. The wind driven generator is used as core equipment of an offshore wind turbine, and plays a role in offshore wind power development. The permanent magnet direct-drive wind generating set is a main stream model in current offshore wind power. However, the permanent magnet direct-drive generator usually works in an ultra-low speed state from a few to tens of revolutions per minute, the volume and the weight of the motor are huge, the design, the manufacturing, the transportation and the installation difficulties of the generator are increased, and the tower foundation construction is also provided with a serious challenge. High-capacity high-power-density offshore wind turbines are a significant demand in current offshore wind power development.
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 that of a permanent magnet motor, and is a research hot spot in the current motor field. Although some megawatt superconducting excitation synchronous motor prototypes have been developed, the brushless transmission problem of exciting current of the superconducting motor and the static sealing problem of cooling liquid are more remarkable, and further development of the superconducting motor is restricted. If the superconducting field coil is arranged on the stator side, although static sealing of the coolant can be achieved, the armature current on the rotor side still needs to be transported using brushes and slip rings. The superconducting coil can be used as an exciting winding and an armature winding, and the armature winding is positioned on the stator side to realize static sealing of cooling liquid. However, the exciting magnetic field acts on the superconducting armature winding, so that the current carrying capacity of the superconducting armature winding can be inhibited, and the alternating current loss of the superconducting armature winding can be increased, so that how to realize effective magnetic shielding of the superconducting armature winding is a key for realizing the application of the superconducting motor.
Aiming at the great demands of offshore wind power on a high-capacity high-power-density high-temperature superconducting motor and the technical problems faced by 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 the complete diamagnetism of the superconducting material to manufacture the superconducting shielding layer, is arranged on the outer side of the superconducting coil, and protects the superconducting coil from being influenced by the internal harmonic magnetic field of the motor, so that the current carrying capacity of the superconducting coil is ensured, and the alternating current loss of the superconducting coil is reduced. Meanwhile, the superconducting coil is arranged at the stator side and used as an armature winding, so that static sealing of cooling liquid can be realized, high-performance permanent magnets are used for excitation, and brushless excitation can be realized by arranging the superconducting coil at the rotor side. Meanwhile, the motor operates based on a magnetic field modulation theory, the pole pair numbers of the armature reaction magnetic field and the exciting magnetic field are unequal, and the self-acceleration principle of the magnetic gear effect is utilized, so that the acceleration operation of a harmonic magnetic field can be realized, and the power density of the motor is further improved. The motor has obvious advantages and bright application prospect.
Disclosure of Invention
The invention aims to: the invention provides a distributed high-temperature superconducting armature motor with an active magnetic shielding function, which utilizes the complete diamagnetism of superconducting materials to construct a superconducting shielding layer, weakens the negative influence of an exciting magnetic field on a superconducting armature winding, ensures the current carrying capacity of the superconducting armature winding, can realize the static sealing of a low-temperature cooling system and the brushless motor, and overcomes the problems in the current rotor superconducting exciting 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;
the rotating shaft, the rotor core and the stator core are coaxial and are sequentially arranged from inside to outside; the rotor core is provided with a magnetism isolating hole and is positioned in the stator core; the permanent magnet is positioned between the stator core and the rotor iron, and is attached to the surface of the rotor core or embedded into the rotor core; the permanent magnets are tile-shaped permanent magnets, and the shape, size, position and the like of the permanent magnets can be designed according to the requirements.
A through hole structure is formed in the Dewar superconducting magnet, a superconducting coil and a superconducting shielding layer are arranged in the Dewar superconducting magnet, and the superconducting coil and the superconducting shielding layer are arranged around the through hole structure;
the Dewar superconducting magnet is arranged in a stator slot of the stator core and sleeved on the stator core, and each stator slot is correspondingly provided with one Dewar superconducting magnet. The superconducting shielding layer in the Dewar superconducting magnet is arranged in the notch of the stator and sleeved on the stator core, can block the diffusion of an air gap magnetic field into the stator slot, has excellent magnetic insulation characteristic, and can form a high-performance magnetic field modulator with 'magnetic insulation material-magnetic conduction material' arranged at intervals with the stator teeth.
The superconducting shielding layer has complete diamagnetism, and has the function of shielding the negative influence of the internal magnetic field of the motor on the superconducting coil and ensuring the current carrying capacity of the superconducting coil.
Further, the stator core and the rotor core may be arranged from left to right to form an axial disk motor, or may 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 fan ring structure, the stator teeth are arranged on an inner circular arc of the fan 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 passes through the through hole structure of the Dewar superconducting magnet, and the Dewar superconducting magnet is sleeved on the stator yoke.
Further, the superconducting coils of the Dewar superconducting magnet are connected to form a distributed armature winding, and the pole pair number of the armature winding is P s Pole pair number of rotor permanent magnet is P r The number of teeth of the stator is P c The three satisfy the following relations: p (P) c ＝P s +P r 。
Specifically, the superconducting coils can form three-phase symmetrical distributed whole-distance armature windings through connection.
Further, the Dewar superconducting magnet further comprises an outer Dewar, an inner Dewar and a cooling liquid flow pipe, wherein the inner and outer Du Wajun are of a single-layer structure;
the inner Du Wawei is arranged in the outer dewar, the through hole structure is positioned in the center of the outer Du Wahe inner dewar, and the outer Du Wahe inner dewar is fixed by a dewar supporting frame; the vacuum state is between the outer Dewar and the inner Dewar; the cooling liquid flow tube 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, and the superconductivity is maintained.
Further, the Dewar superconducting magnet further comprises an evacuation pipe; the evacuating pipeline is connected with the outer dewar and is used for evacuating air between the outer dewar and the inner dewar to form a vacuum state.
Further, the number of the cooling liquid flow pipes is two, and the cooling liquid flow pipes are respectively used for flowing cooling liquid into and flowing out of the inner Dewar;
the inner Dewar is also provided with a cooling liquid baffle, a cooling liquid inflow channel is formed on one side of the cooling liquid baffle, a cooling liquid outflow channel is formed on the other side of the cooling liquid baffle, and two cooling liquid flow pipes are respectively connected with the cooling liquid inflow channel and the cooling liquid outflow channel; the superconductive 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 superconductive shielding layer.
Further, the superconducting coil is fixed in the inner dewar through the superconducting coil support frame, the superconducting shielding layer is fixed in the inner dewar through the superconducting shielding layer support frame, the superconducting coil is located in the superconducting shielding layer, and a partition plate is 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 meanwhile, the superconducting shielding layer can be formed by laminating superconducting tapes or superconducting blocks formed by pressing superconducting powder.
Further, the Dewar superconducting magnet further comprises a current lead tube, and the current lead tube is connected with the cooling liquid flow tube through a three-way pipeline.
The beneficial effects are that:
compared with the existing superconducting motor, the superconducting motor has the following advantages:
(1) The superconducting shielding layer is designed by utilizing the complete diamagnetism of the superconducting material, so that 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 at the side of the stator, so that static sealing of cooling liquid is realized, and brushless motor is realized by applying high-performance permanent magnet excitation.
(3) The superconducting shielding layer and the superconducting coil are arranged in the same Dewar together for integrated design, and a set of low-temperature cooling system is shared, so that the design difficulty of the low-temperature cooling system of the motor is reduced.
(4) The superconductive shielding layer is positioned at the notch of the stator, has extremely strong magnetism isolating performance, can block the diffusion of air gap magnetic flux into the stator slot, can form a high-performance magnetic field modulator of stator teeth (magnetism conducting) -superconductive shielding layer (magnetism blocking) -stator teeth (magnetism conducting) with stator teeth, and improves the power density of the motor by utilizing the self-acceleration effect of magnetic field.
(5) The superconducting shielding layer is utilized to block the air gap magnetic flux from diffusing into the groove, so that the utilization rate of the air gap magnetic flux is improved, and the power factor of the motor is improved.
(6) The superconducting magnet surrounds the stator yoke, the superconducting coil can form a three-phase symmetrical whole-distance distributed armature winding through external connection, and the defects that the superconducting wire is not easy to bend and is not easy to manufacture into a long-span end part laminated distributed winding are overcome.
(7) The temperature-enhanced 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 the high-capacity motor.
Drawings
FIG. 1 is a two-dimensional schematic of an electric motor of the present invention;
FIG. 2 is a schematic diagram of a Dewar superconducting magnet of the motor of the present invention;
FIG. 3 is a schematic view of a single-segment stator core of the motor of the present invention;
FIG. 4 is a schematic view of a stator module of the motor of the present invention formed of a single-segment stator core and superconducting coils;
FIG. 5 is a schematic illustration of an electric machine of the present invention assembled from 12 stator modules into a complete stator;
FIG. 6 is a schematic diagram of a stator core assembled from 12 single-segment stator cores of the motor of the present invention;
FIG. 7 is a schematic diagram of an unloaded back-emf waveform of an armature winding of the motor of the present invention during steady state operation;
FIG. 8 is a schematic illustration of electromagnetic torque waveforms for a motor of the present invention in steady state operation;
wherein: 1. a current lead tube; 2. a cooling liquid flow tube; 3. evacuating the pipeline; 4. an outer Dewar; 5. an inner Dewar; 6. a superconducting coil; 7. a cooling liquid separator; 8. a superconducting shielding layer; 9. a superconducting coil support; 10. a support frame for the superconducting shielding layer; 11. a Dewar support frame; 12. a three-way pipe;
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 the active magnetic shielding function comprises 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 located inside the stator core 13; the rotor core 14 is provided with a magnetism isolating hole 141, the permanent magnet 15 is positioned between the stator core and the rotor iron and is attached to the surface of the rotor core 14; the permanent magnet 15 is a tile-shaped permanent magnet, as shown in fig. 1, twenty-two tile-shaped permanent magnets are arranged on the rotor core 14 of the present invention, and the exciting pole pair number is eleven.
A through hole structure is formed on the Dewar superconducting magnet 16, a superconducting coil 6 and a superconducting shielding layer 8 are arranged in the Dewar 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 encircle the stator core 13; one dewar superconducting magnet 16 is disposed in each stator slot.
The stator core 13 includes a plurality of stator core units, as shown in fig. 6, which 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 fan ring structure, the stator teeth 132 are arranged on an inner circular arc of the fan ring structure, the stator teeth 132 face the circle center of the stator yoke 131, and the circle center is positioned on the rotating shaft 17; the outer arc of the fan ring structure is also provided with an inverted trapezoid bulge which is used for being clamped and positioned with the outer shell during the assembly of the whole fan ring.
The stator yoke 131 passes 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, a dewar superconducting magnet 16 is sleeved on each stator core unit.
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 the number 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 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 tube 3, and an inner and outer Du Wajun are of a single-layer structure.
The evacuation pipeline 3 is connected with the outer dewar 4 and is used for pumping out air between the outer dewar 4 and the inner dewar 5, so that high vacuum degree is realized between the inner dewar and the outer dewar, and a plurality of layers of heat insulation materials can be filled between the outer dewar 4 and the inner dewar 5, thereby guaranteeing the constant temperature performance inside the inner dewar 5.
The racetrack-shaped through-hole structure is positioned at the center of the outer dewar 4 and the inner dewar 5, and the outer dewar 4 and the inner dewar 5 are fixed by a dewar supporting frame 11.
Two cooling liquid flow pipes 2 are arranged at one ends of the outer dewar 4 and the inner dewar 5 and used for cooling liquid to flow into and flow out of the inner dewar 5, the cooling liquid flow pipes 2 penetrate through the outer dewar 4 and are communicated with the inner dewar 5, a cooling liquid partition 7 is arranged in the inner dewar 5, a cooling liquid inflow channel is formed at one side of the cooling liquid partition 7, a cooling liquid outflow channel is formed at the other side of the cooling liquid partition 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 cooling liquid enters the cooling liquid inflow channel through one cooling liquid flow pipe 2, 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 one week, and cooling liquid can be guaranteed to flow out again after flowing out in the inner dewar 5 for one week, 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 and are both of a racetrack-shaped structure and are arranged in parallel around the racetrack-shaped through holes. 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, so that the superconducting coil 6 and the superconducting shielding layer 8 are conveniently installed and fixed; the superconducting shielding layer 8 is of a racetrack 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 two current lead-in pipes 1 are respectively connected with the two cooling liquid flow pipes 2 through three-way pipelines 12, and the current lead-in pipes 1 are used for leading in and leading out current in the superconducting coils 6. The outside is connected with the superconducting coil 6 through the current lead tube 1 to form a distributed armature winding, the invention is a three-phase symmetrical single-layer annular full-distance distributed armature winding with the slot number of each phase of each pole being 2 and the pole pair number being 1, in the invention, the pole pair numbers of the superconducting armature winding and the permanent magnet can be designed into different pole pairs according to practical application requirements, and the number, the size, the shape and the position of the rotor magnetism isolating holes 141 and the grooves on two sides of the outer stator teeth 132 can be optimized according to design requirements. However, the motor is designed and optimized anyway, the pole pair number of the armature winding is P s Pole pair number of rotor permanent magnet is P r The number of teeth of the stator is P c The three must satisfy the relationship: p (P) c ＝P s +P r 。
In the present invention, since the superconducting coils are not bent as randomly as copper wires due to poor mechanical bending performance, the dewar superconducting magnet 16 is wound around the stator yoke 131 so that the superconducting coils constitute a distributed armature winding. The installation of the Dewar superconducting magnet 16 is convenient, and the specific installation steps are as follows: a Dewar superconducting magnet 16 is sleeved on the stator core unit shown in fig. 3, and the steps are 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 an unloaded back-emf waveform of an armature winding of the motor of the present invention during steady state operation; FIG. 8 is a schematic diagram of electromagnetic torque waveforms for a motor of the present invention in steady state operation;
the above description is merely of the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above embodiments, but the present invention is not limited to the above embodiments, and all modifications and variations made by those skilled in the art based on the present disclosure should be included in the scope of the present invention as defined in the appended claims.

Claims (9)

1. The distributed high-temperature superconducting armature motor with the 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 core (14) and the stator 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 core (13) and the rotor iron;
a through hole structure is formed on the Dewar superconducting magnet (16), a superconducting coil (6) and a superconducting shielding layer (8) are arranged in the Dewar 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 each stator slot is correspondingly provided with one Dewar superconducting magnet (16); the superconducting shielding layer (8) is positioned at the notch of the stator and used for blocking the diffusion of the air gap magnetic field into the stator slot;
the stator core (13) comprises a plurality of stator core units which 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 fan ring structure, the stator teeth (132) are arranged on an inner circular arc of the fan ring structure, the stator teeth (132) face the circle center of the stator yoke (131), and the circle center is positioned on the rotating shaft (17);
the stator yoke (131) passes through the 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 material-magnetic conductive material' arranged at intervals.
2. 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 a magnetic shielding hole (141).
3. A distributed high temperature superconducting armature motor with active magnetic shielding according to claim 1, wherein the permanent magnets (15) are tile-shaped permanent magnets.
4. Distributed high-speed magnetic shielding system according to claim 1A superconducting armature motor is characterized in that superconducting coils (6) of a Dewar superconducting magnet (16) are connected to form three-phase symmetrical distributed whole-distance armature windings, and the pole pair number of the armature windings is P s Pole pair number of rotor permanent magnet is P r The number of teeth of the stator is P c The three satisfy the following relations: p (P) c ＝P s +P r 。
5. A distributed high temperature superconducting armature motor with active magnetic shielding 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 fluid flow tube (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 outer Dewar (4) and the inner Dewar (5) are in a vacuum state; the cooling liquid flow pipe (2) passes through the outer dewar (4) to be communicated with the inner dewar (5).
6. A distributed high temperature superconducting armature motor with active magnetic shielding according to claim 5, wherein the dewar superconducting magnet (16) further comprises an evacuation pipe (3);
an evacuation pipe (3) is connected to the outer dewar (4) for evacuating air between the outer dewar (4) and the inner dewar (5).
7. A distributed high temperature superconducting armature motor with active magnetic shielding according to claim 5, wherein the number of cooling liquid flow pipes (2) is two, which are respectively used for cooling liquid to flow into and out of the inner dewar (5);
a cooling liquid baffle plate (7) is also arranged in the inner Dewar (5), a cooling liquid inflow channel is formed on one side of the cooling liquid baffle plate (7), a cooling liquid outflow channel is formed on the other side of the cooling liquid baffle 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).
8. The distributed high-temperature superconducting armature motor with the active magnetic shielding function according to claim 5, wherein 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 located in the superconducting shielding layer (8), and a partition plate is discontinuously arranged between the superconducting coil (6) and the superconducting shielding layer (8).
9. A distributed high temperature superconducting armature motor with active magnetic shielding according to claim 1, characterized in that the dewar superconducting magnet (16) further comprises a current lead tube (1), the current lead tube (1) being connected to the cooling fluid flow tube (2) by means of a three-way pipe (12).
CN202210093529.7A 2022-01-26 2022-01-26 Distributed high-temperature superconducting armature motor with active magnetic shielding function Active CN114421717B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210093529.7A CN114421717B (en) 2022-01-26 2022-01-26 Distributed high-temperature superconducting armature motor with active magnetic shielding function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210093529.7A CN114421717B (en) 2022-01-26 2022-01-26 Distributed high-temperature superconducting armature motor with active magnetic shielding function

Publications (2)

Publication Number Publication Date
CN114421717A CN114421717A (en) 2022-04-29
CN114421717B true CN114421717B (en) 2023-05-23

Family

ID=81277578

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210093529.7A Active CN114421717B (en) 2022-01-26 2022-01-26 Distributed high-temperature superconducting armature motor with active magnetic shielding function

Country Status (1)

Country Link
CN (1) CN114421717B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101951128B (en) * 2010-09-06 2013-01-30 清华大学 High-temperature superconducting motor
CN102997037B (en) * 2011-09-19 2014-12-31 北京云电英纳超导电缆有限公司 Dewar with magnetic shielding or electromagnetic shielding
CN103825387B (en) * 2013-10-09 2016-05-11 中国石油大学(华东) High-temperature superconductor magnetic flux switching motor low-temperature cooling system
CN107707090B (en) * 2017-09-25 2020-02-18 东南大学 Double-stator superconducting brushless doubly-fed wind driven generator
CN110518781B (en) * 2019-08-08 2021-05-11 东南大学 Method for shielding armature reaction in double-stator field modulation superconducting motor

Also Published As

Publication number Publication date
CN114421717A (en) 2022-04-29

Similar Documents

Publication Publication Date Title
US8084909B2 (en) Dual armature motor/generator with flux linkage
EP3293870B1 (en) Dual-stator superconductive exciting field modulating motor
US7956503B2 (en) Dual armature motor/generator with flux linkage
JP6215913B2 (en) Multi-phase permanent magnet motor with adjustable leakage inductance
CN101951128B (en) High-temperature superconducting motor
WO2017190292A1 (en) Efficient laminated coreless generator and manufacturing method therefor
CN107707090B (en) Double-stator superconducting brushless doubly-fed wind driven generator
US11817764B2 (en) Dual pole high temperature superconductive parallel path switched reluctance motor
KR100888030B1 (en) Superconducting synchronous machine
CN114421717B (en) Distributed high-temperature superconducting armature motor with active magnetic shielding function
CN106655548B (en) A kind of stator excitation type high-temperature superconductor field modulating motor
CN109728708B (en) High-temperature superconducting motor
CN112688522B (en) High-power-density axial magnetic field permanent magnet motor structure
CN103780036A (en) Dual-stator structure type high temperature superconducting permanent magnet wind driven generator
CN113629903A (en) High-speed permanent magnet motor
CN111917261A (en) Desaturation magnetic field modulation motor
CN103475188B (en) A kind of double armature winding superconducting motor
CN113067421A (en) Field modulation type outer rotor vernier motor adopting direct-current superconducting excitation and application
CN107659005B (en) Disc type superconducting motor
CN111934506B (en) Non-overlapping winding axial magnetic field permanent magnet synchronous motor
CN108390536A (en) A kind of list cryostat superconducting linear motor
Wang et al. A HTS stator-excited axial-flux magnetic gear with static seal
CN203482079U (en) Double-armature winding superconducting motor
CN111953109A (en) Double-layer integral pitch winding axial magnetic field permanent magnet synchronous motor
CN109617372A (en) A kind of bimorph transducer high-temperature superconductor flux switch motor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant