CN204089367U - The motor of cooling in stator - Google Patents
The motor of cooling in stator Download PDFInfo
- Publication number
- CN204089367U CN204089367U CN201420473827.XU CN201420473827U CN204089367U CN 204089367 U CN204089367 U CN 204089367U CN 201420473827 U CN201420473827 U CN 201420473827U CN 204089367 U CN204089367 U CN 204089367U
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- China
- Prior art keywords
- stator
- heat dissipation
- motor
- main shaft
- respective end
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- 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.)
- Expired - Lifetime
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 24
- 230000017525 heat dissipation Effects 0.000 claims abstract description 58
- 238000009423 ventilation Methods 0.000 claims abstract description 51
- 230000001914 calming effect Effects 0.000 claims abstract description 25
- 238000004080 punching Methods 0.000 claims description 20
- 238000004804 winding Methods 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 11
- 230000001360 synchronised effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Motor Or Generator Cooling System (AREA)
Abstract
The utility model relates to the motor of cooling in a kind of stator, several permanent magnets on external rotor alignment in length and breadth on the inner surface of rotor case, the two ends of rotor are provided with fixed disk, the two ends of stator respectively and leave the gap forming the even gap band of calming the anger in end between the fixed disk of respective end, the annulus forming outer heat dissipation wind channel is provided with between stator lateral surface and rotor medial surface, the axially extending bore of heat dissipation wind channel in forming is provided with in stator core, the two ends of outer heat dissipation wind channel and the two ends of interior heat dissipation wind channel respectively calm the anger gap band even with the end of respective end are communicated with, the even gap band of calming the anger in both ends is communicated with respective ventilation air duct respectively, respectively as wind inlet channel and exhaust air flue, the even ventilation air duct of calming the anger gap band at least one end is provided with forced ventilation device.The utility model electromagnetic property is good, and the heat dissipation problem of efficient solution determinant iron core, so that control the temperature rise of motor, provide space to the raising of motor torque density, be particularly applicable to low-speed high-torque motor.
Description
Technical field
The utility model relates to the external rotor electric machine being provided with cooling structure in a kind of stator core.
Background technology
The advantages such as permanent magnet synchronous motor is high with its efficiency, power density is large are used widely, grow up on this basis a kind of rotor outside, stator core is at interior permagnetic synchronous motor, i.e. external rotor permanent magnet synchronous machine, compared to traditional internal rotor permanent-magnetic synchronous machine of same volume, its stator core diameter is less, the wiring of stator core winding overhang is shorter, save copper cash, its root diameter is larger, therefore the arm of force is rotated larger, be applicable to very much being applied to the occasion exporting high pulling torque, as the electric device of crane, electric motor car etc.
But simultaneously also with occurring new problem: in the iron loss of stator core self and stator core, the copper loss of stator winding can produce a large amount of heat, and whether these heat can discharge motor is in time one of key affecting electric machine temperature rise.Under prior art, motor internal does not have special cooling path, and in order to keep the clean of motor internal, particularly to avoid between stator core and rotor air gap by contaminating impurities such as dusts, usual motor two ends are provided with end cap (fixed disk) or adopt other form enclosed constructions, therefore the heat radiation of the heat radiation of motor particularly stator core is more difficult, be very easy to cause electric machine temperature rise, thus the raising of restriction motor torque density, particularly for the external rotor permanent magnet synchronous machine of low-speed big, because quantity of heat production is large, heat dissipation problem just seems particularly important.
The radiating mode of current permagnetic synchronous motor substantially all adopts surface cooling or cooling fluid cooling naturally, wherein the surperficial natural type of cooling is generally the cooling surface area increasing motor, and thermal resistance is little in stator core outer cover, the aluminium shell of good heat dissipation effect, case surface arranges fin, by thermal radiation and the air natural flowing acquisition cooling on motor housing surface, do not install the cooling device that other are special additional, this radiating mode is comparatively effective for inner rotor motor, but for external rotor electric machine, due to iron core, winding, gap, the radial heat dissipation channel that shell etc. are formed is long, thermal resistance is larger, radiating effect is not ideal enough, particularly for low-speed high-torque motor, satisfied radiating effect cannot be obtained, become a key factor of this motor application of restriction.
Summary of the invention
In order to solve the problems referred to above under prior art, the utility model provides the motor of cooling in a kind of stator, can solve the heat dissipation problem of stator core preferably, effectively control the temperature rise of motor, provide space to the raising of motor torque density.
The technical solution of the utility model is: the motor of cooling in a kind of stator, comprise stators and rotators, described stator is made up of stator core and the winding be arranged in stator core, described stator core is fixedly mounted on stator main shaft, described rotor is external rotor, comprise the rotor case of tubular and be positioned at the permanent magnet of described rotor case, the quantity of described permanent magnet is several, fixed connection is on the inner surface of described rotor case, several permanent magnets described alignment in length and breadth on the inner surface of described rotor case, the permanent magnet quantity of longitudinal linear array is several, laterally (circumference, along the circumferential direction) the permanent magnet quantity of annular array is also several, the two ends of described rotor are equipped with fixed disk, described fixed disk is rotatably connected with described stator main shaft by rotor bearing, described stator two ends respectively and leave the gap forming the even gap band of calming the anger in end between the fixed disk of respective end, the annulus forming outer heat dissipation wind channel is provided with between described stator lateral surface and described rotor medial surface, the axially extending bore of heat dissipation wind channel in forming is provided with in described stator core, the two ends of described outer heat dissipation wind channel and the two ends of described interior heat dissipation wind channel respectively calm the anger gap band even with the described end of respective end are communicated with, the even gap band of calming the anger in described both ends is communicated with respective ventilation air duct respectively, the ventilation air duct of the even gap band of calming the anger in one of them end is used as wind inlet channel, the ventilation air duct of the even gap band of calming the anger in another end is used as exhaust air flue, the even ventilation air duct of calming the anger gap band in end described at least one is provided with forced ventilation device.
The beneficial effects of the utility model are: be bound up on the inner surface of rotor case owing to being alignd in length and breadth by the permanent magnet of rotor, the length of each permanent magnet is little, are conducive to eliminating and suppressing high order harmonic component, optimize electromagnetic property, reduce eddy current loss and caloric value; Owing to being provided with interior heat dissipation wind channel and outer heat dissipation wind channel outside stator interior and stator respectively, and carry out heat dissipation ventilation by force ventilated mode at motor internal, directly stator heat is taken out of, significantly improve radiating effect thus, drastically increase heat-sinking capability, efficiently avoid the too high negative effect that motor is produced of temperature rise, make the adaptability of motor stronger, the moment of torsion adapted to exports higher, and application is wider, more can work in the presence of a harsh environment; Owing to all having the even gap band of calming the anger in corresponding end at inside and outside heat dissipation wind channel two ends, under making the two ends of the two ends of outer heat dissipation wind channel and each heat dissipation wind channel all be in comparatively balanced pressure, be conducive to the equilibrium of air-flow everywhere of each heat dissipation wind channel, heat dissipation wind channel, improve radiating effect; Advantages such as owing to being arranged on motor internal to the heat dissipation wind channel of stator, not taking the motor external space, have that volume is little, disguised strong, energy-saving and environmental protection, ensuring smooth transmission are stable.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the present utility model;
Fig. 2 is the structural representation of another embodiment of the present utility model;
Fig. 3 is section structure schematic diagram of the present utility model.
Embodiment
As Fig. 1, shown in Fig. 2 and Fig. 3, the utility model discloses the motor of cooling in a kind of stator, comprise stators and rotators 1, described stator is made up of stator core 2 and the winding 3 be arranged in stator core, described stator core is fixedly mounted on stator main shaft 4, described rotor is external rotor, comprise the rotor case of tubular and be positioned at the permanent magnet of described rotor case, the quantity of described permanent magnet is several, fixed connection is on the inner surface of described rotor case, several permanent magnets described alignment in length and breadth on the inner surface of described rotor case, the permanent magnet quantity of longitudinal linear array is several, the permanent magnet quantity of transverse annular arrangement is also several, the two ends of described rotor are equipped with fixed disk, described fixed disk is rotatably connected with described stator main shaft by rotor bearing (not shown), described stator two ends respectively and leave between the fixed disk of respective end and form the even gap band 6 of calming the anger in end, the gap of 7, the annulus (cross section ringwise) forming outer heat dissipation wind channel 8 is provided with between described stator lateral surface and described rotor medial surface, axis (being parallel to the direction of the stator main-shaft axis) through hole of heat dissipation wind channel 9 in forming is provided with in described stator core, the two ends of described outer heat dissipation wind channel and the two ends of described interior heat dissipation wind channel respectively calm the anger gap band even with the described end of respective end are communicated with, the even gap band of calming the anger in described both ends is communicated with respective ventilation air duct respectively, the ventilation air duct of the even gap band of calming the anger in one of them end is used as wind inlet channel 10, the ventilation air duct of the even gap band of calming the anger in another end is used as exhaust air flue 11, the even ventilation air duct of calming the anger gap band in end described at least one is provided with forced ventilation device.By the draught effect (air blast and/or air inducing) of forced ventilation device, the air-flow with Air Quantity Required and pressure is formed at described interior heat dissipation wind channel and outer heat dissipation wind channel, heat on stator is fallen apart after in the air-flow of interior heat dissipation wind channel and outer heat dissipation wind channel by heat exchange and is taken out of by air-flow, realizes the object of high effect forced heat radiation thus.The even gap band of calming the anger of above-mentioned outer heat dissipation wind channel and end can be all the respective clearance of existing motor, is conducive to simplified structure.
Usually, described stator core is made up of the stator punching stacked vertically of some same structures, in the case, preferably, described stator punching upper punch is shaped with some heat dissipation wind channel holes, described interior heat dissipation wind channel is made up of the corresponding heat dissipation wind channel hole on described each stator punching, thus can when substantially not increasing processing technology or technology difficulty, the interior heat dissipation wind channel needed for formation.
Preferably, the some heat dissipation wind channel holes on described stator punching distribute along same even circumferential, thus can balanced radiating effect everywhere.When needs arrange multi-layer heat dissipation air duct hole, the some heat dissipation wind channel holes on described stator punching can along multiple circle distribution, and some heat dissipation wind channel holes of each circumference are uniformly distributed.
Preferably, described stator punching is distributed in same circumferentially the shape in some heat dissipation wind channel holes identical with size, the arc strip hole that to be with the center of described stator punching be the center of circle, improves the area of dissipation in air channel effectively when can ensure stator core intensity thus.
Preferably, the distance of this stator punching inward flange of the heat dissipation wind channel pitch-row on described stator punching (being positioned at the edge of the spindle mounting hole of central authorities) is less than apart from the outer peripheral distance of this stator punching, thus when comprehensive outer heat dissipation wind channel and interior heat dissipation wind channel effect, improve overall heat dissipation efficiency and heat-sinking capability.
Usually, described ventilation air duct can be opened in (as Fig. 1) on the fixed disk of respective end, with simplified structure, reduce windage and raise the efficiency, described ventilation air duct also can be opened in (as Fig. 2) on the stator main shaft of respective end, to improve the adaptability to forced ventilation device, simplify the syndeton between forced ventilation device, and improve draught capacity.The described ventilation air duct be opened on the fixed disk of respective end preferably penetrates the fixed disk ventilation hole of this fixed disk, the described ventilation air duct offered on the stator main shaft of respective end is preferably made up of the axial main shaft ventilation hole 41 be opened on respective end stator main shaft and side direction main shaft ventilation hole 42, the outer end opening of described axial main shaft ventilation hole is in the main-axis end of described respective end, inner end shutoff (comprise and adopt closeouts shutoff or be arranged to blind hole), described side direction main shaft ventilation hole is arranged on the sidewall of described axial main shaft ventilation hole, one end is communicated with the even gap band of calming the anger in end of respective end, the other end is communicated with described axial main shaft ventilation hole.
As a kind of execution mode, described forced ventilation device can be breeze fan, described wind inlet channel is opened on the stator main shaft of respective end, the air outlet of described breeze fan is communicated with described wind inlet channel, adapt with this forced ventilation mode, described exhaust air flue can be opened on the fixed disk of respective end, also can be opened on the stator main shaft of respective end, when described exhaust air flue is opened on the fixed disk of respective end, the quantity of the described exhaust air flue be opened on the fixed disk of respective end can be multiple usually, to improve draught capacity.
As another kind of execution mode, described forced ventilation device can be air inducing blower fan, described exhaust air flue is opened on the stator main shaft of respective end, the air inlet of described air inducing blower fan is communicated with described exhaust air flue, adapt with this forced ventilation mode, described wind inlet channel can be opened on the fixed disk of respective end, also can be opened on the stator main shaft of respective end, when described wind inlet channel is opened on the fixed disk of respective end, the quantity of the described wind inlet channel be opened on the fixed disk of respective end can be multiple usually, to improve draught capacity.
As another execution mode, the quantity of described wind inlet channel and exhaust air flue is several, be opened in respectively on the fixed disk of respective end, described exhaust air flue is provided with air-out unidirectional valve 12, described forced ventilation device is air intake air pump 13, the quantity of described air intake air pump is several, is connected in series in each self-corresponding described wind inlet channel respectively, the wind inlet channel at described air intake air pump two ends is equipped with corresponding air intake unidirectional valve (as intake valve 14, vent valve 15).Can by existing and other possible appropriate technologies of any suitable to the driving of described air pump and work method control.
Preferably, described air intake air pump comprises cylinder body, described cylinder body is axially disposed within corresponding described fixed disk, supporting piston is provided with in described cylinder body, described piston is connected with the piston rod extended to inside described fixed disk, described cylinder body internal cavity is divided into rod chamber and rodless cavity by described piston, described rod chamber is positioned at the inner side of described rodless cavity, described stator main shaft is provided with and is positioned at the even gap band and form the multi-level cam 16 of cam mechanism with described valve rod of calming the anger of respective end, described multi-level cam promotes described valve rod when rotating and moves back and forth, the air inlet of described air intake air pump and gas outlet are all located at the bottom of described rodless cavity, described rodless cavity forms a part for described wind inlet channel thus, realize the serial connection of described air pump on described wind inlet channel.Usually can arrange the wheel with described cam engagement in valve stem tip, the boss of described cam also can adopt a curved-surface structure pushing up arc and two inner arc smooth connections, to reduce friction.During machine operation, described fixed disk rotates with external rotor and drives the valve rod of each air pump described to move back and forth by described multi-level cam, and then drive the piston reciprocating of each air pump to move, along with the movement of piston, rely on the effect of the air intake unidirectional valve on the wind inlet channel of described air intake air pump two ends, extraneous air enters rodless cavity, then enters the even gap band of calming the anger of respective end from rodless cavity, after interior heat dissipation wind channel and outer heat dissipation wind channel, the air outlet through the other end flows out.According to actual needs, can by the boss quantity etc. on suitable air pump quantity (wind inlet channel quantity), air pump parameter and cam, the requirement of motor radiating to air quantity and blast can be met.This air pump, without the need to separately connecing external impetus, is started working automatically when machine operation, automatically stops when motor stops, very convenient.
The utility model is adapted to the crane hoisting mechanism of low-speed big outer-rotor permanent magnet motor and the gearless driving based on this motor especially, described crane hoisting mechanism is using external rotor as the urceolus of crane hoisting mechanism, eliminate the mechanical reduction gear of existing conventional hoist lifting mechanism, not only simplify structure, reduce volume, but also improve efficiency and reliability.For stating for simplicity, the utility model is to relate to electronic part in the electrical equipments such as the motor under motor general reference ordinary meaning and crane hoisting mechanism.
Claims (10)
1. the motor of cooling in a stator, comprise stators and rotators, described stator is made up of stator core and the winding be arranged in stator core, described stator core is fixedly mounted on stator main shaft, described rotor is external rotor, comprise the rotor case of tubular and be positioned at the permanent magnet of described rotor case, the quantity of described permanent magnet is several, fixed connection is on the inner surface of described rotor case, several permanent magnets described alignment in length and breadth on the inner surface of described rotor case, the permanent magnet quantity of longitudinal linear array is several, the permanent magnet quantity of transverse annular arrangement is also several, the two ends of described rotor are equipped with fixed disk, described fixed disk is rotatably connected with described stator main shaft by rotor bearing, it is characterized in that described stator two ends respectively and leave the gap forming the even gap band of calming the anger in end between the fixed disk of respective end, the annulus forming outer heat dissipation wind channel is provided with between described stator lateral surface and described rotor medial surface, the axially extending bore of heat dissipation wind channel in forming is provided with in described stator core, the two ends of described outer heat dissipation wind channel and the two ends of described interior heat dissipation wind channel respectively calm the anger gap band even with the described end of respective end are communicated with, the even gap band of calming the anger in described both ends is communicated with respective ventilation air duct respectively, the ventilation air duct of the even gap band of calming the anger in one of them end is used as wind inlet channel, the ventilation air duct of the even gap band of calming the anger in another end is used as exhaust air flue, the even ventilation air duct of calming the anger gap band in end described at least one is provided with forced ventilation device.
2. the motor of cooling in stator as claimed in claim 1, it is characterized in that described stator core is made up of the stator punching stacked vertically of some same structures, described stator punching upper punch is shaped with some heat dissipation wind channel holes, and described interior heat dissipation wind channel is made up of the corresponding heat dissipation wind channel hole on described each stator punching.
3. the motor of cooling in stator as claimed in claim 2, it is characterized in that the some heat dissipation wind channel holes on described stator punching distribute along same even circumferential, or the some heat dissipation wind channel holes on described stator punching are along multiple circle distribution, some heat dissipation wind channel holes of each circumference are uniformly distributed.
4. the motor of cooling in stator as claimed in claim 3, is characterized in that the shape described stator punching being distributed in same some heat dissipation wind channel holes is circumferentially identical with size, the arc strip hole that to be with the center of described stator punching be the center of circle.
5. the motor of cooling in stator as claimed in claim 4, is characterized in that the distance of this stator punching inward flange of heat dissipation wind channel pitch-row on described stator punching is less than apart from the outer peripheral distance of this stator punching.
6. as claim 1, 2, 3, the motor of cooling in the stator described in 4 or 5, it is characterized in that on the fixed disk that described ventilation air duct is opened in respective end or be opened on the stator main shaft of respective end, the described ventilation air duct be opened on the fixed disk of respective end is the fixed disk ventilation hole penetrating this fixed disk, the described ventilation air duct offered on the stator main shaft of respective end is made up of the axial main shaft ventilation hole be opened on respective end stator main shaft and side direction main shaft ventilation hole, the outer end opening of described axial main shaft ventilation hole is in the main-axis end of described respective end, inner end shutoff, described side direction main shaft ventilation hole is arranged on the sidewall of described axial main shaft ventilation hole, one end is communicated with the even gap band of calming the anger in end of respective end, the other end is communicated with described axial main shaft ventilation hole.
7. the motor of cooling in stator as claimed in claim 6, it is characterized in that described forced ventilation device is breeze fan, described wind inlet channel is opened on the described stator main shaft of respective end, the air outlet of described breeze fan is communicated with described wind inlet channel, described in be opened in the exhaust air flue on the fixed disk of respective end quantity be multiple.
8. the motor of cooling in stator as claimed in claim 6, it is characterized in that described forced ventilation device is air inducing blower fan, described exhaust air flue is opened on the stator main shaft of respective end, the air inlet of described air inducing blower fan is communicated with described exhaust air flue, described in be opened in the wind inlet channel on the fixed disk of respective end quantity be multiple.
9. the motor of cooling in stator as claimed in claim 6, it is characterized in that the quantity of described wind inlet channel and described exhaust air flue is several, be opened on the described fixed disk of respective end respectively, described exhaust air flue is provided with air-out unidirectional valve, described forced ventilation device is air intake air pump, the quantity of described air intake air pump is several, is connected in series in each self-corresponding described wind inlet channel respectively, the wind inlet channel at described air intake air pump two ends is equipped with corresponding air intake unidirectional valve.
10. the motor of cooling in stator as claimed in claim 9, it is characterized in that described air intake air pump comprises cylinder body, described cylinder body is axially disposed within corresponding described fixed disk, supporting piston is provided with in described cylinder body, described piston is connected with the piston rod extended to inside described fixed disk, described cylinder body internal cavity is divided into rod chamber and rodless cavity by described piston, described rod chamber is positioned at the inner side of described rodless cavity, described stator main shaft is provided with and is positioned at the even gap band and form the multi-level cam of cam mechanism with described valve rod of calming the anger of respective end, described multi-level cam promotes described valve rod when rotating and moves back and forth, air inlet and the gas outlet of described air intake air pump are equipped with in the bottom of described rodless cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420473827.XU CN204089367U (en) | 2014-08-21 | 2014-08-21 | The motor of cooling in stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420473827.XU CN204089367U (en) | 2014-08-21 | 2014-08-21 | The motor of cooling in stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204089367U true CN204089367U (en) | 2015-01-07 |
Family
ID=52182036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420473827.XU Expired - Lifetime CN204089367U (en) | 2014-08-21 | 2014-08-21 | The motor of cooling in stator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204089367U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116966970A (en) * | 2023-06-12 | 2023-10-31 | 江苏邦鼎科技有限公司 | A hammer crusher |
| CN119906212A (en) * | 2025-01-24 | 2025-04-29 | 东方电气集团东方电机有限公司 | A method for reducing the temperature difference of the stator of a long-core permanent magnet wind turbine at high altitude |
-
2014
- 2014-08-21 CN CN201420473827.XU patent/CN204089367U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116966970A (en) * | 2023-06-12 | 2023-10-31 | 江苏邦鼎科技有限公司 | A hammer crusher |
| CN119906212A (en) * | 2025-01-24 | 2025-04-29 | 东方电气集团东方电机有限公司 | A method for reducing the temperature difference of the stator of a long-core permanent magnet wind turbine at high altitude |
| CN119906212B (en) * | 2025-01-24 | 2025-08-08 | 东方电气集团东方电机有限公司 | A method for reducing the temperature difference of the stator of a long-core permanent magnet wind turbine at high altitude |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yu Liansheng Inventor after: Yu Lihao Inventor before: Yu Liansheng Inventor before: Qin Jun Inventor before: Liu Liang |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YU LIANSHENG QIN JUN LIU LIANG TO: YU LIANSHENG YU LIHAO |
|
| CX01 | Expiry of patent term |
Granted publication date: 20150107 |
|
| CX01 | Expiry of patent term |