CN103780036A - Dual-stator structure type high temperature superconducting permanent magnet wind driven generator - Google Patents
Dual-stator structure type high temperature superconducting permanent magnet wind driven generator Download PDFInfo
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- CN103780036A CN103780036A CN201410021335.1A CN201410021335A CN103780036A CN 103780036 A CN103780036 A CN 103780036A CN 201410021335 A CN201410021335 A CN 201410021335A CN 103780036 A CN103780036 A CN 103780036A
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Abstract
The invention discloses a dual-stator structure type high temperature superconducting permanent magnet wind driven generator. In the housing, the rotor is a hollow cup-shaped rotor, the bottom portion of the rotor is fixedly connected with a spindle, permanent magnets are attached and distributed uniformly and separately on inner and outer walls of the rotor in the circumferential direction; inner and outer stators are arranged inside and outside the rotor in the circumferential direction separately, an air gap exists between the inner and the outer stators and the permanent magnets on the inner and outer walls of the rotor; outer stator grooves are distributed uniformly and separately on the inner side of the outer stator in the circumferential direction, a first superconducting armature winding is wound on two adjacent outer stator grooves; inner stator grooves are distributed uniformly and separately on the outer side of the inner stator in the circumferential direction, a second superconducting armature winding is wound on two adjacent inner stator grooves, and the first and second superconducting armature windings are sealed through first and second cooling devices separately. The wind driven generator of the invention adopts the dual-stator structure, so the rotary sealing problem with cooling liquid does not exist, advantages of simple and reliable structure, less loss and high power density can be realized, and the wind driven generator is suitable for direct drive type low-speed wind turbine generator systems.
Description
Technical field
The present invention relates to a kind of high-temperature superconductor magneto of double-stator structure, relate in particular to a kind of high-temperature superconductor permanent-magnetic wind driven generator of double-stator structure.
Background technology
The single-machine capacity of wind turbine generator has entered MW class, and volume, the weight etc. of generator also increases thereupon, and this can make the installation of motor, maintenance cost improve, and the development of superconductor technology is expected to address these problems.Superconducting motor has that power density is large, loss is little, efficiency advantages of higher, can effectively reduce volume and the weight of motor.Although superconducting wire does not have loss after passing into direct current, in the time passing into alternating current, be to produce loss, so the DC excitation winding of traditional superconducting motor is superconductor, exchanges armature and select normal conductor.But DC excitation winding is positioned on rotor, is rotating parts, can cause its cooling fluid in rotation situation lower seal difficulty, is a kind of unreliable factor.This will become the weak link of megawatt-stage direct-drive superconductive wind driven generator group.
Summary of the invention
For overcoming the problems referred to above of prior art, the invention provides a kind of high-temperature superconductor permanent-magnetic wind driven generator of double-stator structure, adopt permanent magnet excitation, stator armature uses superconductor, do not exist rotary seal problem and A.C.power loss very little, be applicable to direct-drive type low speed wind power generating set.
The technical solution used in the present invention is:
The present invention includes casing, internal stator, external stator and rotor, rotating shaft is run through and is arranged on casing by bearing, it is characterized in that: in casing, rotor is hollow cup-shaped rotor, rotor bottom is fixedly connected with rotating shaft, on the inside and outside wall of rotor along the uniform permanent magnet that posts of circle spacing; In rotor, be provided with internal stator along circumference, rotor outer circumference is provided with external stator, between internal stator, the external stator permanent magnet respectively and on the inside and outside wall of rotor, has air gap; External stator inner side along the circumferential direction has the external stator groove axial along rotating shaft uniformly at intervals, on two adjacent external stator grooves, is wound with the first superconductive armature winding, and the first superconductive armature winding is outward by the first cooling device sealing; Internal stator outside along the circumferential direction has axial along rotating shaft and corresponding with each external stator groove of external stator inner side pilot trench decided at the higher level but not officially announced uniformly at intervals, on two adjacent pilot trench decided at the higher level but not officially announced, be wound with the second superconductive armature winding, the second superconductive armature winding is outward by the second cooling device sealing.
In the first described cooling device and the second cooling device, be filled with cooling fluid.
Described cooling fluid is liquid nitrogen.
Described permanent magnet is the SMD radial magnetizing permanent magnetism body of tile shape.
The material of described permanent magnet is NdFeB.
The quantity of the external stator groove of described external stator and the pilot trench decided at the higher level but not officially announced of internal stator is 12.
The quantity of the permanent magnet on the inside and outside wall of described rotor is respectively 10.
The first described superconductive armature winding and the second superconductive armature winding adopt hts tape.
Described the first superconductive armature winding and the second superconductive armature winding are track type, adopt fractional-slot to concentrate winding construction.
The invention has the beneficial effects as follows:
1. the rotary seal problem that does not have cooling fluid, reliability is high.
2. double-stator structure, in superconductor, the amplitude of electric current is little, and motor number of pole-pairs is few, and in superconductor, the frequency of electric current is low, and the reducing of current amplitude and frequency reduces the A.C.power loss of motor.
3. hollow cup-shaped rotor, quality is little, and moment of inertia is low, and wind energy utilization is high.
4. pair gap structure, further reduces volume and the weight of motor.
Accompanying drawing explanation
Fig. 1 is axial arrangement schematic diagram of the present invention.
Fig. 2 is winding partial enlarged drawing of the present invention.
Fig. 3 is the cutaway view of A-A direction of the present invention.
Fig. 4 is the cutaway view of B-B direction of the present invention.
Fig. 5 is the structural representation of the first superconductive armature winding and the first cooling device.
Fig. 6 is the structure chart of permanent magnet.
In figure: 1, external stator, 2, internal stator, 3, rotor, 4, permanent magnet, 5-1, the first superconductive armature winding, 5-2, the second superconductive armature winding, 6-1, the first cooling device, 6-2, the second cooling device, 7-1, the first air gap, 7-2, interstice, 8, casing, 9, rotating shaft, 10, bearing.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Fig. 1, Fig. 3, Fig. 4, Fig. 5, Fig. 6, comprise casing 8, internal stator 2, external stator 1 and rotor 3, rotating shaft 9 is run through and is arranged on casing 8 by bearing 10; In casing 8, rotor 3 is hollow cup-shaped rotor, and rotor 3 bottoms are fixedly connected with rotating shaft 9, on the inside and outside wall of rotor 3 along the uniform permanent magnet 4 that posts of circle spacing; Rotor 3 is interior is provided with internal stator 2 along circumference, and rotor 3 outer circumference are provided with external stator 1, between internal stator 2, external stator 1 permanent magnet 4 respectively and on the inside and outside wall of rotor 3, has air gap; External stator 1 inner side along the circumferential direction has the external stator groove axial along rotating shaft 9 uniformly at intervals, as shown in Figure 2, on two adjacent external stator grooves, be wound with the first superconductive armature winding 5-1 of track type, the first superconductive armature winding 5-1 is outward by the first cooling device 6-1 sealing; Internal stator 2 outsides along the circumferential direction have and with external stator 1 inner side each external stator groove corresponding decided at the higher level but not officially announced pilot trench axial along rotating shaft 9 uniformly at intervals, on two adjacent pilot trench decided at the higher level but not officially announced, be wound with the second superconductive armature winding 5-2 of track type, the second superconductive armature winding 5-2 is outward by the second cooling device 6-2 sealing.The structure of the first superconductive armature winding and the second superconductive armature winding is all identical, and the first cooling device is all identical with the second cooling device structure.
In the first cooling device 6-1 and the second cooling device 6-2, be filled with cooling fluid, cooling fluid is liquid nitrogen.
The SMD radial magnetizing permanent magnetism body that permanent magnet 4 is tile shape.
The material of permanent magnet 4 is NdFeB.
The quantity of the external stator groove of external stator 1 and the pilot trench decided at the higher level but not officially announced of internal stator 2 equates, is 12.
The quantity of the permanent magnet 4 on the inside and outside wall of rotor 3 equates, is 10.
The first superconductive armature winding 5-1 and the second superconductive armature winding 5-2 adopt hts tape.
The first described superconductive armature winding 5-1 and the second superconductive armature winding 5-2 are equal track type, adopt fractional-slot to concentrate winding construction.
As shown in Fig. 1, Fig. 3, Fig. 4, external stator 1 is provided with 12 external stator grooves, internal stator 2 is provided with 12 pilot trench decided at the higher level but not officially announced, the first superconductive armature winding 5-1 of hts tape and the second superconductive armature winding 5-2 are coiled into track type, wherein the first superconductive armature winding 5-1 is sealed in the first cooling device 6-1 of filled with liquid nitrogen, be arranged on external stator 1, two effective edges in an one racetrack-type rotor coil are positioned over respectively in two external stator grooves adjacent on space.The second superconductive armature winding 5-2 is sealed in the second cooling device 6-2 of filled with liquid nitrogen, be arranged on internal stator 2, two effective edges in an one racetrack-type rotor coil are placed respectively in two spatially adjacent pilot trench decided at the higher level but not officially announced, and placement corresponding to external stator coil.Two groups of armature winding finally carry out parallel connected in reverse phase, are connected with electrical network through superconducting transformer and device for power switching.
Consider that the general bulky of wind-driven generator, weight are high, its installation and maintenance is very difficult, thus should simplify the structure of motor as far as possible, and cancel the part that reliability is low.Superconductor is because of huge volume and the weight that can effectively reduce motor of its current density, but in traditional megawatt-stage direct-drive superconductive wind driven generator group, superconductor is positioned on rotor, need to seal in rotation in the situation that coolingly, and this is weak link.If the part of superconduction is transferred on stator armature, just can change rotary seal originally into standstill seal, can make full use of advantage that superconductor current density is large and can effectively improve again the reliability of motor, reduce maintenance cost.There is the problem of A.C.power loss in AC superconduction armature but, therefore the present invention adopts double-stator structure, and two cover stator armatures are shared the stator current of half separately, and the electric current in superconductor is reduced by half, coordinate again low speed and the low frequency of motor, just can effectively reduce A.C.power loss.In addition, double-stator structure makes rotor be hollow cup-shaped, and moment of inertia is very low, can improve wind energy utilization, and the structure of two air gaps can also further reduce volume and the weight of motor.
The specific embodiment of the invention course of work:
The wind wheel blade rotation of unit drags rotating shaft 9 with certain speed clockwise or be rotated counterclockwise, the permanent magnet 4 on rotating shaft 9 rotor drivens 3 and surface thereof rotates between external stator 1 and internal stator 2, make to occur respectively in air gap 7-1 and 7-2 rotating magnetic field, their speed of rotation and direction are identical, but polarity is contrary.These two rotating magnetic fields cause respectively the coil inside magnetic flux on external stator 1 and internal stator 2 to change, and are produced induced potential by electromagnetic induction.Be connected with electrical network with device for power switching through superconducting transformer again, outwards carry threephase AC electric energy.
Above-mentioned embodiment is used for the present invention that explains, rather than limits the invention, and in the protection range of spirit of the present invention and claim, any modification and change that the present invention is made, all fall into protection scope of the present invention.
Claims (9)
1. the high-temperature superconductor permanent-magnetic wind driven generator of a double-stator structure, comprise casing (8), internal stator (2), external stator (1) and rotor (3), rotating shaft (9) is run through and is arranged on casing (8) by bearing (10), it is characterized in that: in casing (8), rotor (3) is hollow cup-shaped rotor, rotor (3) bottom is fixedly connected with rotating shaft (9), on the inside and outside wall of rotor (3) along the uniform permanent magnet (4) that posts of circle spacing; In rotor (3), be provided with internal stator (2) along circumference, rotor (3) outer circumference is provided with external stator (1), between internal stator (2), external stator (1) permanent magnet (4) respectively and on the inside and outside wall of rotor (3), has air gap; External stator (1) inner side along the circumferential direction has the external stator groove axial along rotating shaft (9) uniformly at intervals, on two adjacent external stator grooves, be wound with the first superconductive armature winding (5-1), the first superconductive armature winding (5-1) is outer by the first cooling device (6-1) sealing; Internal stator (2) outside along the circumferential direction has axial along rotating shaft (9) and corresponding with each external stator groove of external stator (1) inner side pilot trench decided at the higher level but not officially announced uniformly at intervals, on two adjacent pilot trench decided at the higher level but not officially announced, be wound with the second superconductive armature winding (5-2), the second superconductive armature winding (5-2) is outer by the second cooling device (6-2) sealing.
2. the high-temperature superconductor permanent-magnetic wind driven generator of a kind of double-stator structure according to claim 1, is characterized in that: in described the first cooling device (6-1) and the second cooling device (6-2), be filled with cooling fluid.
3. the high-temperature superconductor permanent-magnetic wind driven generator of a kind of double-stator structure according to claim 2, is characterized in that: described cooling fluid is liquid nitrogen.
4. the high-temperature superconductor permanent-magnetic wind driven generator of a kind of double-stator structure according to claim 1, is characterized in that: the SMD radial magnetizing permanent magnetism body that described permanent magnet (4) is tile shape.
5. the high-temperature superconductor permanent-magnetic wind driven generator of a kind of double-stator structure according to claim 1, is characterized in that: the material of described permanent magnet (4) is NdFeB.
6. the high-temperature superconductor permanent-magnetic wind driven generator of a kind of double-stator structure according to claim 1, is characterized in that: the quantity of the external stator groove of described external stator (1) and the pilot trench decided at the higher level but not officially announced of internal stator (2) is 12.
7. the high-temperature superconductor permanent-magnetic wind driven generator of a kind of double-stator structure according to claim 1, is characterized in that: the quantity of the permanent magnet (4) on the described inside and outside wall of rotor (3) is respectively 10.
8. the high-temperature superconductor permanent-magnetic wind driven generator of a kind of double-stator structure according to claim 1, is characterized in that: the first described superconductive armature winding (5-1) and the second superconductive armature winding (5-2) adopt hts tape.
9. the high-temperature superconductor permanent-magnetic wind driven generator of a kind of double-stator structure according to claim 1, it is characterized in that: described the first superconductive armature winding (5-1) and the second superconductive armature winding (5-2) are track type, adopt fractional-slot to concentrate winding construction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410021335.1A CN103780036A (en) | 2014-01-17 | 2014-01-17 | Dual-stator structure type high temperature superconducting permanent magnet wind driven generator |
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| CN201410021335.1A CN103780036A (en) | 2014-01-17 | 2014-01-17 | Dual-stator structure type high temperature superconducting permanent magnet wind driven generator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883015A (en) * | 2015-05-06 | 2015-09-02 | 东南大学 | Dual-stator superconductive exciting field modulating motor |
| CN106253322A (en) * | 2016-09-11 | 2016-12-21 | 浙江大学 | A kind of current transformer of the high-temperature superconductor dc bus for wind-driven generator |
| ES2656821A1 (en) * | 2016-08-30 | 2018-02-28 | Gamesa Innovation & Technology, S.L. | Synchronous generator for wind turbines (Machine-translation by Google Translate, not legally binding) |
| CN109617373A (en) * | 2019-01-17 | 2019-04-12 | 上海交通大学 | A kind of synchronous motor and starting method of based superconductive permanent magnetism mixed rotor magnet |
| CN113517795A (en) * | 2021-09-07 | 2021-10-19 | 北京精雕科技集团有限公司 | Rotating electric machine |
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| CN1426625A (en) * | 2000-12-29 | 2003-06-25 | 通用电气公司 | Superconductive armature winding for electrical machine |
| US20080161189A1 (en) * | 2004-08-09 | 2008-07-03 | Clive Lewis | Superconducting Electrical Machines |
| CN101917101A (en) * | 2010-08-06 | 2010-12-15 | 国电联合动力技术有限公司 | Double-stator direct-drive permanent magnet wind powered generator |
| CN103166426A (en) * | 2013-04-15 | 2013-06-19 | 国电联合动力技术有限公司 | Superconducting generator and rotor thereof |
| CN203352398U (en) * | 2013-07-03 | 2013-12-18 | 国电联合动力技术有限公司 | Double-air-gap superconductive switched reluctance generator |
| CN203734486U (en) * | 2014-01-17 | 2014-07-23 | 浙江大学 | High-temperature superconductive permanent-magnetic aerogenerator with double-stator structure |
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2014
- 2014-01-17 CN CN201410021335.1A patent/CN103780036A/en active Pending
Patent Citations (6)
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| CN1426625A (en) * | 2000-12-29 | 2003-06-25 | 通用电气公司 | Superconductive armature winding for electrical machine |
| US20080161189A1 (en) * | 2004-08-09 | 2008-07-03 | Clive Lewis | Superconducting Electrical Machines |
| CN101917101A (en) * | 2010-08-06 | 2010-12-15 | 国电联合动力技术有限公司 | Double-stator direct-drive permanent magnet wind powered generator |
| CN103166426A (en) * | 2013-04-15 | 2013-06-19 | 国电联合动力技术有限公司 | Superconducting generator and rotor thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883015A (en) * | 2015-05-06 | 2015-09-02 | 东南大学 | Dual-stator superconductive exciting field modulating motor |
| CN104883015B (en) * | 2015-05-06 | 2017-09-19 | 东南大学 | Bimorph transducer superconduction exciting field modulating motor |
| ES2656821A1 (en) * | 2016-08-30 | 2018-02-28 | Gamesa Innovation & Technology, S.L. | Synchronous generator for wind turbines (Machine-translation by Google Translate, not legally binding) |
| CN106253322A (en) * | 2016-09-11 | 2016-12-21 | 浙江大学 | A kind of current transformer of the high-temperature superconductor dc bus for wind-driven generator |
| CN106253322B (en) * | 2016-09-11 | 2019-07-02 | 浙江大学 | A kind of current transformer of the high-temperature superconductor DC bus for wind-driven generator |
| CN109617373A (en) * | 2019-01-17 | 2019-04-12 | 上海交通大学 | A kind of synchronous motor and starting method of based superconductive permanent magnetism mixed rotor magnet |
| CN113517795A (en) * | 2021-09-07 | 2021-10-19 | 北京精雕科技集团有限公司 | Rotating electric machine |
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Application publication date: 20140507 |