CN104767302A - Rotor core and stator core, rotor and stator structure and doubly-fed generator - Google Patents
Rotor core and stator core, rotor and stator structure and doubly-fed generator Download PDFInfo
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- CN104767302A CN104767302A CN201510166755.3A CN201510166755A CN104767302A CN 104767302 A CN104767302 A CN 104767302A CN 201510166755 A CN201510166755 A CN 201510166755A CN 104767302 A CN104767302 A CN 104767302A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a rotor core and stator core structure, a rotor and stator structure comprising the rotor core and stator core structure, and a doubly-fed generator. A rotor core structure comprises a rotor core fastening pull rod, a rotor core pressing ring, rotor core segments and a rotary shaft, wherein rotor core air grooves are formed between the rotor core segments, and the rotor core fastening pull rod penetrates through the rotor core segments and the rotor core air grooves and is connected with the rotor core pressing ring in a fastened mode. A stator core comprises stator core segments, a stator core rib plate and a stator core pressing ring, wherein stator core air grooves are formed between the stator core segments, the stator core segments are fastened by the stator core rib plate in the radial direction and fastened by the stator core pressing ring in the axial direction, and the stator core rib plate and the stator core pressing ring are connected. The rotor core fastening pull rod and the stator core rib plate are made of non-conductive magnet insulating materials. By the adoption of the rotor core and stator core structure, the rotor and stator structure and the doubly-fed generator, the efficiency of a motor can be improved on the premise that the cost of the motor is not increased basically.
Description
Technical field
The present invention relates to machine field, particularly relate to rotor core and the stator core construction of a kind of low core loss and supplementary load loss, containing its rotor and stator structure, and double feedback electric engine.
Background technology
Double-fed generator combines the advantage of asynchronous generator and synchronous generator and a kind of novel electricity generator grown up, it has good runnability, the active power of adjustable electrical network and reactive power, in the stability improving network re-active power and frequency and reactive power and voltage, there is wide development prospect.Double-fed wind power generator group is still wind-power market mainstream model.
But double-fed wind power generator is compared with direct-drive permanent magnet wind power generator and high-speed permanent magnetic wind-driven generator, efficiency is lower, especially, under light running operating mode, cause double-fed fan motor unit complete machine generating efficiency lower, performance and annual energy output are lower than direct-drive permanent-magnetism Wind turbines and high-speed permanent magnetic Wind turbines.
For promoting the competitiveness of double-fed fan motor unit in market, the core component of double-fed fan motor unit and the performance of double-fed wind power generator, especially efficiency characteristic just need be promoted.
Promote the efficiency characteristic of double-fed generator, have number of ways, as: use low-loss silicon steel sheet, reduce motor iron loss; Use magnetic slot-seal, reduce iron loss and the accessory loss of motor; Optimize rotor grooved, optimize and shorten Stator and Rotor Windings tip lengths etc.But the means of these lifting double-fed wind power generator efficiency characteristics and approach all can cause the to a certain degree increase of motor cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of rotor core, stator core construction, rotor, stator structure and double feedback electric engine, substantially not increase on the basis of motor cost, realizes the lifting of electric efficiency.
For solving the problems of the technologies described above, the present invention takes following technical scheme:
A kind of rotor core structure, comprise rotor core fastening pull rod, rotor core pressing ring, segmented rotor iron core, rotating shaft, wherein: between described segmented rotor iron core, be provided with rotor core ventilation slot, rotor core fastening pull rod is through segmented rotor iron core, rotor core ventilation slot, and be fastenedly connected with rotor core pressing ring, described rotor core fastening pull rod is processed by not magnetic conduction insulating material manufacture.
Further, described not magnetic conduction insulating material is fiberglass, glass cloth laminated sheet or epoxy plate.
Further, described rotor core ventilation slot is formed by rotor core ventilation channel plate, rotor core ventilation slot gusset, along the circumferential direction uniform rotor core ventilation slot gusset and rotor core ventilation channel plate weld together, and described rotor core ventilation channel plate is welded by multi-layer rotor punching.
A kind of rotor core and stator core construction, described rotor core adopts above-mentioned rotor core structure; Described stator core comprises segmented stator core, stator core gusset and stator core trim ring, is provided with stator core ventilation slot between described segmented stator core; Stator core gusset is in the fastening segmented stator core of radial direction, and stator core trim ring is in axially fastening segmented stator core, and stator core gusset is connected with stator core trim ring; Described stator core gusset adopts not magnetic conduction insulating material to make.
Further, the not magnetic conduction insulating material that described stator core gusset adopts is fiberglass, glass cloth laminated sheet or epoxy plate.
Further, described stator core gusset is trapezium structure, and segmented stator core periphery is provided with the trapezoidal draw-in groove with described trapezium structure interference fit.
Further, described stator core ventilation slot is formed by stator core ventilation channel plate, stator core ventilation slot gusset, along the circumferential direction uniform stator core ventilation slot gusset and stator core ventilation channel plate weld together, and described stator core ventilation channel plate is welded by multi-layer stator punching.
Further, in described rotor core structure, be also provided with rotor core end plate between segmented rotor iron core and rotor core pressing ring, rotor core fastening pull rod is fastenedly connected through clamp nut and rotor core pressing ring; In described stator core construction, also be disposed with stator core vat end plate, stator core end plate between segmented stator core and stator core trim ring, stator core trim ring is fastenedly connected through along the circumferential direction uniform trim ring fastening bolt and stator core end plate, stator core vat end plate; Along the circumferential direction uniform stator core gusset, through segmented stator core, stator core ventilation slot, stator core vat end plate, stator core end plate, is fastenedly connected through gusset fastening bolt and stator core trim ring.
A kind of rotor and stator structure, containing above-mentioned rotor core and stator core construction.
A kind of double feedback electric engine, containing above-mentioned rotor core and stator core construction, the monolateral gap of described segmented stator core and segmented rotor iron core forms air gap.
Owing to adopting technique scheme, the present invention at least has the following advantages:
1, the rotor core fastening pull rod of fixed rotor iron core entirety adopts not magnetic conduction insulating material manufacture to process, it does not produce induced potential in the alternating magnetic field rotated, equivalent resistance is also infinitely great, do not produce the closed loop galvanic circle that similar cage induction motor rotor bar and rotor end ring form, thus reduce iron loss and the supplementary load loss of double fed electric machine rotor iron core, improve electric efficiency, and do not increase cost.
2, the rotor core ventilation channel plate of rotor core is welded by rotor punching, is equivalent to the effective length adding rotor core, compared with convention rotor core ventilation frid structure, under same rotor core length, improves the performance of motor; Or under equal motor performance requires, can rotor core length be shortened, and substantially not increase motor cost.
3, the stator core gusset of fixed stator iron core entirety adopts not magnetic conduction insulating material manufacture to process, it does not produce induced potential in the alternating magnetic field rotated, equivalent resistance is also infinitely great, do not produce the closed loop galvanic circle that similar cage induction motor rotor bar and rotor end ring form, thus reduce iron loss and the supplementary load loss of double feedback electric engine stator core, improve electric efficiency, and do not increase cost.
4, the trapezoidal draw-in groove tight fit assembling that the trapezoidal stator core gusset of fixed stator iron core entirety is corresponding to segmented stator core, ensure that the integrally-built intensity of stator core.
5, the stator ventilation channel plate of stator core is welded by stator punching, is equivalent to the effective length adding stator core, compared with conventional stator ventilation channel plate structure, under same stator core length, improves the performance of motor; Or under equal motor performance requires, stator core length can be shortened, and substantially do not increase motor cost.
6, rotor core of the present invention and stator core construction, for double-fed wind power generator, do not use better performances instead but the more expensive silicon steel material of price, non-dependability need the magnetic slot-seal material verified and substantially do not increase on the basis of motor cost, realize the lifting of double feedback electric engine efficiency.This structure through using for reference conversion, in the stator core construction that can be widely used in other kind motors or rotor core structure.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, and in order to better understand technological means of the present invention, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Fig. 1 is the novel double feedback electric engine stator core of one in the present invention and rotor core structure figure;
Fig. 2 is a kind of novel double feedback electric engine stator core in the present invention and the stator core ventilation channel plate of rotor core and the sectional view of rotor core ventilation channel plate;
Fig. 3 is a kind of conventional double feedback electric engine stator core and the stator core ventilation slot of rotor core and the structure chart of rotor core ventilation slot;
Fig. 4 is the structure chart of a kind of double feedback electric engine stator core of improvement in the present invention and the stator core ventilation slot of rotor core and rotor core ventilation slot;
Fig. 5 is the partial enlarged drawing (the I portion enlarged drawing in Fig. 4) of a kind of double feedback electric engine stator core of improvement in the present invention and the stator core ventilation slot of rotor core and rotor core ventilation slot.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Refer to shown in Fig. 1, Fig. 2, the novel double feedback electric engine stator core of one in the present invention and rotor core structure, stator core comprises: stator core trim ring 1, stator core end plate 2, stator core vat end plate 3, stator core ventilation channel plate 4, stator core ventilation slot gusset 5, stator core gusset 6, the segmented stator core 7 of some quantity, gusset fastening bolt 8, trim ring fastening bolt 9; Rotor core comprises: rotor core fastening pull rod 11, rotor core pressing ring 12, rotor core end plate 13, segmented rotor iron core 14, rotor core ventilation channel plate 15, rotor core ventilation slot gusset 16, rotating shaft 17; Segmented stator core 7 is air gap 10 with the monolateral gap of segmented rotor iron core 14.
The stator punching that segmented stator core 7 is stamped to form by conventional silicon-steel sheet is overrided to form, stator core ventilation slot is formed between segmented stator core 7, stator core ventilation slot is formed by stator core ventilation channel plate 4, stator core ventilation slot gusset 5, and along the circumferential direction uniform stator core ventilation slot gusset 5 welds together with stator core ventilation channel plate 4.Stator core ventilation channel plate 4 has the tooth slot structure roughly the same with stator punching.The stator core ventilation slot gusset 5 equal with segmented stator core 7 groove number is evenly arranged on the tooth of stator core ventilation channel plate 4, and after being welded into a whole with stator core ventilation channel plate 4, forms stator core ventilation slot.
Stator core comprises segmented stator core 7 and the stator ventilation slot of some quantity.
Stator core vat end plate 3, stator core end plate 2, stator core trim ring 1 is provided with at stator core two ends, the stator core gusset 6 of some quantity is through each segmented stator core 5, each stator ventilation channel plate 4, each stator core vat end plate 3, each stator core end plate 4, and be uniformly distributed along stator core circumferencial direction.
Stator core vat end plate 3, stator core end plate 2 are fixed through some trim ring fastening bolts 9 be along the circumferential direction evenly arranged with stator core trim ring 1; Stator core gusset 6 is fixed through some gusset fastening bolts 8 be along the circumferential direction evenly arranged with stator core trim ring 1.
The corresponding trapezoidal draw-in groove tight fit of the stator core gusset 6 of trapezium structure and segmented stator core 7, stator core ventilation channel plate 4, stator core vat end plate 3, stator core end plate 2 is assembled, to ensure the overall construction intensity of stator core.
Stator core gusset 6 by fiberglass, glass cloth laminated sheet, epoxy plate etc. not the manufacture of magnetic conduction insulating material process.
Stator core trim ring 1 processes for the manufacture of conventional steel sheet material.
In conventional double feedback electric engine stator core construction, the stator core gusset of fixed stator iron core entirety adopts general steel plate manufacture to process, it is induced potential in the alternating magnetic field rotated, produce the closed loop galvanic circle that similar cage induction motor rotor bar and rotor end ring form, produce induced current, thus produce the additional resistance loss of stator core, reduce motor operational efficiency.
And the stator core gusset 6 in the present invention adopts not magnetic conduction insulating material, would not in the AC magnetic field rotated, produce induced potential, though stator core gusset 6 is fixedly connected with through some trim ring bolts 9 be along the circumferential direction evenly arranged with stator core trim ring 1, but do not form the closed loop galvanic circle that the sliver of similar cage induction motor rotor and rotor end ring form, thus reduce iron loss and the supplementary load loss of double feedback electric engine stator core, improve electric efficiency.
The rotor punching that segmented rotor iron core 14 is stamped to form by conventional silicon-steel sheet is overrided to form, and forms rotor core ventilation slot between segmented rotor iron core 14.Rotor core ventilation slot is formed by rotor core ventilation channel plate 15, rotor core ventilation slot gusset 16, and along the circumferential direction uniform rotor core ventilation slot gusset 16 welds together with rotor core ventilation channel plate 15. and rotor core ventilation channel plate 15 has the tooth slot structure roughly the same with rotor punching.The rotor core ventilation slot gusset 16 equal with segmented rotor iron core 14 groove number is evenly arranged on the tooth of rotor core ventilation channel plate 15, and after being welded into a whole with rotor core ventilation channel plate 15, forms rotor core ventilation slot.
Rotor core comprises segmented rotor iron core 14 and the rotor core ventilation slot of some quantity.
Rotor core end plate 13, rotor core pressing ring 12 is provided with at rotor core two ends, the rotor core fastening pull rod 11 of some quantity is through each segmented rotor iron core 14, each rotor core ventilation channel plate 15, stretch out outside rotor core pressing ring 12, and be uniformly distributed along rotor core circumferencial direction, rotor core fastening pull rod 11 two ends are tightened fixing through clamp nut and rotor core pressing ring 12.
In the rotor core structure of conventional double feedback electric engine, the rotor core fastening pull rod of fixed rotor iron core entirety adopts general steel plate manufacture to process, rotor core fastening pull rod two ends and rotor core pressing ring are fixed through clamp nut, produce the closed loop galvanic circle that similar cage induction motor rotor bar and rotor end ring form, it produces induced potential in the alternating magnetic field rotated, thus generation induced current, produce resistance loss, thus add the supplementary load loss of rotor core, reduce motor operational efficiency.
And rotor core fastening pull rod 11 in the present invention by fiberglass, glass cloth laminated sheet, epoxy plate etc. not the manufacture of magnetic conduction insulating material process.
Rotor core fastening pull rod 11 adopts not after magnetic conduction insulating material, though its two ends to be tightened with rotor core pressing ring 12 through fastening bolt and are fixedly connected with, but do not form the closed loop galvanic circle that the sliver of similar cage induction motor rotor and rotor end ring form, thus reduce iron loss and the supplementary load loss of double fed electric machine rotor iron core, improve electric efficiency.
Refer to shown in Fig. 3, Fig. 3 is a kind of conventional double feedback electric engine stator core and the stator core ventilation slot of rotor core and the structure chart of rotor core ventilation slot.Because the needs of welding procedure, stator core ventilation channel plate 4 and rotor core ventilation channel plate 15 are stamped to form by the sheet metal that 1-3mm is thick usually, and steel-sheet magnetic property is far below silicon steel sheet.
Refer to shown in Fig. 4, Fig. 5, Fig. 4 is the structure chart of the double feedback electric engine stator core of a kind of improvement of the present invention and the stator core ventilation slot of rotor core and rotor core ventilation slot; Fig. 5 is the partial enlarged drawing of the double feedback electric engine stator core of a kind of improvement of the present invention and the stator core ventilation slot of rotor core and rotor core ventilation slot.
The stator core ventilation channel plate 4 of structure of the present invention is laminated by 3-6 sheet stator punching and is welded;
Same being laminated by 3-6 sheet rotor punching of the rotor core ventilation channel plate 15 of structure of the present invention is welded.
Stator core ventilation channel plate 4 adopts stator punching to be welded, rotor core ventilation channel plate 15 adopts rotor punching to be welded, be equivalent to the effective length adding stator core, rotor core, axial stator-rotor iron core ventilation channel plate gross thickness generally accounts for the 5%-8% of stator-rotor iron core effective length, compared with conventional stator-rotor iron core ventilation channel plate structure, under same stator-rotor iron core length, improve the performance of motor; Or under equal motor performance requires, the stator-rotor iron core length of 5%-8% can be shortened.
In sum, said stator iron core and rotor core and containing its stators and rotators, all may be used for double-fed wind power generator, do not use better performances instead but the more expensive silicon steel material of price, non-dependability need the magnetic slot-seal material verified and substantially do not increase on the basis of motor cost, realize the lifting of double feedback electric engine efficiency.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a rotor core structure, comprise rotor core fastening pull rod, rotor core pressing ring, segmented rotor iron core, rotating shaft, wherein: between described segmented rotor iron core, be provided with rotor core ventilation slot, rotor core fastening pull rod is through segmented rotor iron core, rotor core ventilation slot, and be fastenedly connected with rotor core pressing ring, it is characterized in that, described rotor core fastening pull rod is processed by not magnetic conduction insulating material manufacture.
2. rotor core structure according to claim 1, is characterized in that, described not magnetic conduction insulating material is fiberglass, glass cloth laminated sheet or epoxy plate.
3. rotor core structure according to claim 1, it is characterized in that, described rotor core ventilation slot is formed by rotor core ventilation channel plate, rotor core ventilation slot gusset, along the circumferential direction uniform rotor core ventilation slot gusset and rotor core ventilation channel plate weld together, and described rotor core ventilation channel plate is welded by multi-layer rotor punching.
4. rotor core and a stator core construction, is characterized in that, described rotor core adopts the rotor core structure described in any one of claim 1-3;
Described stator core comprises segmented stator core, stator core gusset and stator core trim ring, is provided with stator core ventilation slot between described segmented stator core; Stator core gusset is in the fastening segmented stator core of radial direction, and stator core trim ring is in axially fastening segmented stator core, and stator core gusset is connected with stator core trim ring; Described stator core gusset adopts not magnetic conduction insulating material to make.
5. rotor core according to claim 4 and stator core construction, is characterized in that, the not magnetic conduction insulating material that described stator core gusset adopts is fiberglass, glass cloth laminated sheet or epoxy plate.
6. rotor core according to claim 4 and stator core construction, is characterized in that, described stator core gusset is trapezium structure, and segmented stator core periphery is provided with the trapezoidal draw-in groove with described trapezium structure interference fit.
7. rotor core according to claim 4 and stator core construction, it is characterized in that, described stator core ventilation slot is formed by stator core ventilation channel plate, stator core ventilation slot gusset, along the circumferential direction uniform stator core ventilation slot gusset and stator core ventilation channel plate weld together, and described stator core ventilation channel plate is welded by multi-layer stator punching.
8. rotor core according to claim 4 and stator core construction, it is characterized in that, in described rotor core structure, be also provided with rotor core end plate between segmented rotor iron core and rotor core pressing ring, rotor core fastening pull rod is fastenedly connected through clamp nut and rotor core pressing ring;
In described stator core construction, also be disposed with stator core vat end plate, stator core end plate between segmented stator core and stator core trim ring, stator core trim ring is fastenedly connected through along the circumferential direction uniform trim ring fastening bolt and stator core end plate, stator core vat end plate; Along the circumferential direction uniform stator core gusset, through segmented stator core, stator core ventilation slot, stator core vat end plate, stator core end plate, is fastenedly connected through gusset fastening bolt and stator core trim ring.
9. rotor and a stator structure, is characterized in that, containing the rotor core described in any one of claim 4-8 and stator core construction.
10. a double feedback electric engine, is characterized in that, containing the rotor core described in any one of claim 4-8 and stator core construction, the monolateral gap of described segmented stator core and segmented rotor iron core forms air gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510166755.3A CN104767302A (en) | 2015-04-09 | 2015-04-09 | Rotor core and stator core, rotor and stator structure and doubly-fed generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510166755.3A CN104767302A (en) | 2015-04-09 | 2015-04-09 | Rotor core and stator core, rotor and stator structure and doubly-fed generator |
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| CN104767302A true CN104767302A (en) | 2015-07-08 |
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| CN201510166755.3A Pending CN104767302A (en) | 2015-04-09 | 2015-04-09 | Rotor core and stator core, rotor and stator structure and doubly-fed generator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162300A (en) * | 2015-08-03 | 2015-12-16 | 天津甘泉集团有限公司 | Fanning strip welded rotor with second squirrel-cage rotor |
| CN106300857A (en) * | 2016-10-19 | 2017-01-04 | 江苏航天动力机电有限公司 | New energy electric motor rotor structure |
| CN106300732A (en) * | 2016-08-30 | 2017-01-04 | 浙江玛拓驱动设备有限公司 | A kind of Capstan rotor structure |
| CN106411009A (en) * | 2016-11-22 | 2017-02-15 | 北京三电机系统有限责任公司 | Permanent magnet motor rotor and generator |
| CN109728660A (en) * | 2019-02-25 | 2019-05-07 | 孙丽丽 | A kind of radial cooling motor that circulates |
| CN113437814A (en) * | 2021-07-30 | 2021-09-24 | 上海电气风电集团股份有限公司 | Stator and wind driven generator |
| CN113991902A (en) * | 2021-11-04 | 2022-01-28 | 山东中喆德元智能装备有限公司 | Efficient body excitation motor rotor structure, mounting method and motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105162300A (en) * | 2015-08-03 | 2015-12-16 | 天津甘泉集团有限公司 | Fanning strip welded rotor with second squirrel-cage rotor |
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| CN113437814A (en) * | 2021-07-30 | 2021-09-24 | 上海电气风电集团股份有限公司 | Stator and wind driven generator |
| CN113991902A (en) * | 2021-11-04 | 2022-01-28 | 山东中喆德元智能装备有限公司 | Efficient body excitation motor rotor structure, mounting method and motor |
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