CN114142637B - Megawatt high-power high-speed motor wind path structure - Google Patents
Megawatt high-power high-speed motor wind path structure Download PDFInfo
- Publication number
- CN114142637B CN114142637B CN202111436803.8A CN202111436803A CN114142637B CN 114142637 B CN114142637 B CN 114142637B CN 202111436803 A CN202111436803 A CN 202111436803A CN 114142637 B CN114142637 B CN 114142637B
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- Prior art keywords
- air
- stator
- communicated
- inlet
- gap
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- 238000009423 ventilation Methods 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000004080 punching Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000007787 solid Substances 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- H02K1/12—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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
- H02K9/18—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
Abstract
The invention discloses a megawatt high-power high-speed motor air path structure which comprises a base, a rotor, a stator and a cooler, wherein the base is a box-type base, the rotor is connected with the base through an end cover and a bearing, an inner fan is not arranged on a rotor shaft, the stator is fixed on the base, middle support plates are arranged at two ends of the stator, a plurality of air inlet cavities and ventilation holes are formed in the outer wall of the stator, a plurality of ventilation channels are formed in the stator, the cooler is arranged at the top end of the base and communicated with the inside of the base, and the motor air path structure is a symmetrical structure. The motor wind path structure can reduce wind resistance of the whole motor and fully meet the cooling effect of cooling the solid rotor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a megawatt high-power high-speed motor wind path structure.
Background
Unlike common motors, high-speed motors generally adopt permanent magnet structures, but are not suitable for megawatt-level high-power application occasions, and in order to ensure that the rotor has enough strength, a solid rotor structure is generally adopted, but the eddy current loss of the rotor is serious, and the friction loss of the surface of the rotor is large when the rotor runs at a high rotating speed, so that the problem of heating of the rotor is outstanding. In particular to a megawatt high-power high-speed motor which needs to solve the key problems of small heat dissipation area, high loss density, overhigh temperature rise and the like caused by compact structure and more voltage harmonics.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides a megawatt high-power high-speed motor wind path structure, which has smaller wind resistance and can fully meet the cooling effect of cooling a solid rotor.
The megawatt high-power high-speed motor wind path structure comprises a base, a rotor, a stator and a cooler.
The stator is fixed on the machine base and consists of a plurality of punching sheets which are distributed at intervals along the axial direction, two ends of the stator are respectively provided with a middle support plate, the interior of the machine base is divided into two air inlet areas and one air outlet area by the middle support plates, and the stator is positioned in the air outlet areas;
the stator comprises a stator body, a middle support plate, a plurality of air inlets, a plurality of separation covers, a plurality of air inlet cavities, a plurality of first gaps or a plurality of second gaps, a plurality of first ventilating channels and a plurality of fourth ventilating channels, wherein the air inlets are distributed at intervals along the circumferential direction of the middle support plate, the plurality of separation covers form a plurality of air inlet cavities, the plurality of air inlet cavities are distributed on the outer wall of the stator at intervals along the circumferential direction, the air inlet cavities are communicated with the air inlet area, the plurality of first gaps or the plurality of second gaps are formed between the punching sheets, the first gaps and the second gaps are distributed at intervals along the axial direction in sequence, the first gaps are provided with a plurality of first ventilating channels and fourth ventilating channels which are distributed along the circumferential direction, the first ventilating channels and the fourth ventilating channels are separated by a plurality of second ventilating channels and third ventilating channels which are distributed along the circumferential direction, the first ventilating channels or the second ventilating channels are communicated with tooth parts of the stator, and the second ventilating channels or the third ventilating channels are communicated with the tooth parts of the stator;
the cooler is arranged at the top end of the machine base and is fixedly connected with the machine base, an air inlet of the cooler is communicated with the air outlet area, and an air outlet of the cooler is communicated with the air inlet area.
In some embodiments, the divider housing includes a plurality of support webs and a plurality of cover plates.
In some embodiments, a ring plate is further provided, the ring plate is provided in the middle section of the iron core, the iron core is symmetrical with respect to the ring plate, and the ring plate is used for dividing the iron core into two sections.
In some embodiments, the first ventilation slot piece and the second ventilation slot piece are both bent structures, and the bending directions of the first ventilation slot piece and the second ventilation slot piece are opposite.
In some embodiments, there are 6 inlet cavities and 12 outlets, wherein each two outlets corresponds to one inlet cavity.
In some embodiments, the cooler has two water-cooled cores symmetrically distributed.
In some embodiments, a centrifugal fan is disposed at the outlet of the water-cooled core.
In some embodiments, a first baffle and a second baffle are further provided, the first baffle being disposed between the two water cooled cores, the second baffle being disposed below the centrifugal fan.
In some embodiments, the first baffle is a Y-shaped structure.
In some embodiments, the megawatt high power high speed motor wind path structure is a symmetrical structure, the megawatt high power high speed motor wind path structure being symmetrically distributed with respect to a center thereof.
The invention has the beneficial effects that:
1. the motor adopts a symmetrical air path structure, and the structure is compact.
2. The rotor is not provided with a fan part, and the main air path in the motor mainly depends on the effect of a centrifugal fan in the cooler to blow air into the back of the stator from the outlet of the cooler, so that CFD simulation analysis shows that the air path is smooth.
3. The wind speed distribution of the back part of the stator and the radial ventilating duct is uniform, the integral temperature distribution of the stator and the coil is concentrated, and the integral temperature difference change is smaller.
4. The heat source in the solid rotor is subjected to convection enhanced heat transfer at the air gap between the stator and the rotor through cooling gas, so that the heat of a rotor component is taken away, the highest temperature of the middle section of the solid rotor is reduced by 25% -30% compared with that of a box-type motor with a conventional wind path structure, and the ventilation and heat dissipation effects of a megawatt high-power high-speed motor are met.
5. The wind resistance of the whole wind path structure with the back of the stator serving as the main wind inlet area and the circumferential partition of the stator is small, and the cooling effect of cooling the solid rotor can be fully met.
6. The first ventilation slot piece and the second ventilation slot piece are used for enhancing the structural strength of the ventilation channel and have drainage effect.
Drawings
FIG. 1 is a schematic diagram of a wind path of a megawatt high-power high-speed motor according to an embodiment of the invention;
FIG. 2 is a schematic view of a portion of a stator according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a stator lamination in accordance with an embodiment of the invention;
FIG. 4 is a cross-sectional view of another stator lamination in accordance with an embodiment of the invention;
FIG. 5 is a schematic view of a middle support plate according to an embodiment of the present invention;
FIG. 6 is a schematic view of the flow of the air path according to an embodiment of the present invention.
FIG. 7 is a schematic flow diagram of an external wind path of a stator according to an embodiment of the present invention;
FIG. 8 is a schematic view of the flow of the internal air path of the stator according to an embodiment of the present invention;
fig. 9 is a schematic view illustrating the flow of an internal air path of a stator according to another embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the air path structure of the megawatt high-power high-speed motor according to the embodiment of the invention comprises a stand 1, a rotor 2, a stator 3 and a cooler 10.
Specifically, the frame 1 is a box-type frame, two ends of the frame are respectively provided with end covers, bearings are arranged on the end covers, two ends of the rotor 2 are respectively in running fit with the bearings, the rotor 2 comprises a rotor solid rotating shaft and rotor guide bars, two ends of each rotor guide bar are welded tightly after being in expansion joint with copper end rings, and steel ring components with balancing effects are arranged at the end parts.
The stator shown in fig. 2 is half of the whole stator 3, the other half is identical to the stator in structure, the stator and the stator are distributed in bilateral symmetry, and the stator are separated through annular plates. The stator 3 is sleeved on the rotor 2, the stator 3 is a hollow cylinder, the stator is made by lamination of punching sheets, and a plurality of punching sheets are evenly distributed at intervals along the axial direction of the stator 3. The outer wall of the stator 3 is provided with ventilation holes distributed at intervals along the circumferential direction and the axial direction of the stator 3, and each ventilation hole is communicated with a corresponding ventilation channel. The stator 3 both ends are equipped with middle extension board 8 respectively, and middle extension board 8 will be inside the frame 1 to divide into the air inlet district of both sides and the air-out district in the centre, and stator 3 is located the air-out district.
A plurality of inverted U-shaped separation covers are circumferentially distributed on the outer wall of the stator 3 at intervals, each separation cover is axially extended and arranged, and each separation cover is formed by connecting a cover plate 7 and support rib plates 6 on two sides.
And 6 inlet cavities are formed between each separation cover and the outer wall of the stator, and are evenly distributed on the outer wall of the stator 3 along the circumferential direction at intervals. An open outlet cavity is formed between adjacent partition covers.
Gaps are respectively formed between the punching sheets on the stator, the gaps are respectively a first gap and a second gap, and the first gap and the second gap are sequentially and alternately distributed along the axial direction of the stator.
The first gap has a first ventilation channel A and a fourth ventilation channel D, and the second gap has a second ventilation channel B and a third ventilation channel C. Many. The first ventilating duct A, the second ventilating duct B, the third ventilating duct C and the fourth ventilating duct D are all radial ventilating ducts.
The first ventilating duct A and the fourth ventilating duct D are inclined along the clockwise direction and circumferentially distributed in the first gap, and adjacent first ventilating ducts A or fourth ventilating ducts D are separated through the first ventilating slot pieces 4. The radial inner ends of the first ventilation channel A and the fourth ventilation channel D extend to the tooth parts of the stator 3. The first air duct A is communicated with the inlet cavity at the radial outer end of the first clearance position, and the fourth air duct D is communicated with the outlet cavity at the radial outer end of the first clearance position.
The second air passage B and the third air passage C are circumferentially distributed between the two punching sheets along the anticlockwise direction, and adjacent second air passage B or third air passage C are separated by the second air passage sheet 5. The radial inner end of the second or third through-passage B or C extends to the teeth of the stator 3. The second air passage B is communicated with the outlet cavity at the radial outer end of the first clearance position, and the third air passage C is communicated with the inlet cavity at the radial outer end of the second clearance position.
Twelve air inlets are formed in the middle support plate 8, every two air inlets form a pair of air inlet groups, six air inlet groups are evenly distributed at intervals along the circumferential direction of the middle support plate 8, each air inlet group corresponds to one inlet cavity, and the air inlets are communicated with the inlet cavity and the air inlet area. The cooler 10 is arranged above the machine base 1, an air inlet of the cooler is communicated with an air outlet area of the machine base 1, and the cooler is provided with two air outlets which are respectively communicated with two air inlet areas of the machine base 1. Two symmetrically distributed water-cooling cores 101 are arranged in the cooler 10, centrifugal fans 102 are respectively arranged at the outlets of the two water-cooling cores 101, a first guide plate 103 is arranged between the two water-cooling cores 101, the first guide plate 103 is of a Y-shaped structure, and the first guide plate 103 divides the air inlet of the cooler into two inlets which respectively correspond to the inlets of the two water-cooling cores 101. A second guide plate 104 is arranged below the centrifugal fan 102, two ends of the second guide plate 104 are respectively connected with the machine base 1 and the centrifugal fan 102, and the second guide plate 104 and the inner wall of the cooler form a horn mouth, and the specific shape is shown in fig. 1. The centrifugal fan 102 is driven by a driving motor fixedly installed in the cooler 10.
The megawatt high-power high-speed motor wind path structure is symmetrically distributed about the center of the megawatt high-power high-speed motor wind path structure as a whole.
According to the megawatt high-power high-speed motor wind path structure provided by the embodiment of the invention, when the motor starts to work, cold air enters an air inlet area of the machine base 1 through the guidance of the second guide plate 104 under the power action of the centrifugal fan 102, and the cold air flows through the upper part of the coil at the end part of the stator 3 and enters an air inlet cavity from the air inlet of the middle support plate 8. The cool air reaches the teeth of the stator 3 through the first air passage a or the third air passage C, and finally flows into the air gap between the stator 3 and the rotor 2. The hot air flows out through the tooth parts of the stator 3, flows out of the stator along the second air passage B or the fourth air passage D, and enters the air outlet area through the outlet cavity. The hot air flows into the cooler 10 after being guided by the first guide plate 103, is cooled by the water cooling core 101 in an intensified manner, and then flows into the engine base 1 again along the second guide plate 104 by the suction force of the centrifugal fan, and starts the next internal air path cooling flow circulation.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present invention.
If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is for convenience only as well as for simplicity of description, and nothing more than a particular meaning of the terms is intended to be used unless otherwise stated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. A megawatt high power high speed motor wind path structure comprising:
a base;
the rotor is provided with a plurality of grooves,
the stator is fixed on the machine base and consists of a plurality of punching sheets which are distributed at intervals along the axial direction, two ends of the stator are respectively provided with a middle support plate, the interior of the machine base is divided into two air inlet areas and one air outlet area by the middle support plates, and the stator is positioned in the air outlet areas;
the middle support plate is provided with a plurality of air inlets which are distributed at intervals along the circumferential direction of the middle support plate;
the stator outer wall is also provided with a plurality of separation covers, the plurality of separation covers form a plurality of inlet cavities, the plurality of inlet cavities are circumferentially distributed on the stator outer wall at intervals, the inlet cavities are communicated with the inlet area, an open outlet cavity is formed between two adjacent inlet cavities, and the outlet cavity is communicated with the outlet area;
gaps are respectively formed between the punching sheets, the gaps comprise a first gap and a second gap, the first gap and the second gap are alternately distributed along the axial direction at intervals,
the first gap is provided with a first ventilation channel and a fourth ventilation channel, and the second gap is provided with a second ventilation channel and a third ventilation channel; the first ventilating duct, the second ventilating duct, the third ventilating duct and the fourth ventilating duct are all radial ventilating ducts;
the first ventilating duct and the fourth ventilating duct are inclined along the clockwise direction and circumferentially distributed in the first gap, and the adjacent first ventilating duct and fourth ventilating duct are separated by a first ventilating slot sheet; the radial inner ends of the first ventilating duct and the fourth ventilating duct extend to the tooth parts of the stator; the first air duct is communicated with the inlet cavity at the radial outer end of the first air duct at the first clearance position, and the fourth air duct is communicated with the outlet cavity at the radial outer end of the fourth air duct at the first clearance position;
the second air passage and the third air passage are circumferentially distributed in a second gap along the anticlockwise direction, and adjacent second air passages and third air passages are separated by a second air passage sheet; the radial inner ends of the second air passage and the third air passage extend to the stator tooth parts; the radial outer end of the second air passage is communicated with the outlet cavity at the second clearance position, and the radial outer end of the third air passage is communicated with the inlet cavity at the second clearance position;
the stator is symmetrical relative to the annular plate, and the annular plate is used for dividing the stator into two sections;
the first ventilation groove piece and the second ventilation groove piece are of bending structures, and the bending directions of the first ventilation groove piece and the second ventilation groove piece are opposite;
the number of the inlet cavities is 6, the number of the air inlets is 12, and each two air inlets correspond to one inlet cavity;
the cooler is arranged at the top end of the machine base and is fixedly connected with the machine base, an air inlet of the cooler is communicated with the air outlet area, and an air outlet of the cooler is communicated with the air inlet area;
the cooler is provided with two water-cooling cores which are symmetrically distributed;
a centrifugal fan is arranged at the outlet of the water-cooling core body;
the centrifugal fan is characterized by further comprising a first guide plate and a second guide plate, wherein the first guide plate is arranged between the two water-cooling cores, and the second guide plate is arranged below the centrifugal fan;
the first guide plate is of a Y-shaped structure.
2. The megawatt high power high speed motor wind path structure of claim 1 wherein said divider housing comprises two support webs and a cover plate.
3. The megawatt high power high speed motor wind path structure of claim 1, wherein the megawatt high power high speed motor wind path structure is symmetrically distributed with respect to the center thereof.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021114167433 | 2021-11-26 | ||
| CN202111416743 | 2021-11-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114142637A CN114142637A (en) | 2022-03-04 |
| CN114142637B true CN114142637B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111436803.8A Active CN114142637B (en) | 2021-11-26 | 2021-11-30 | Megawatt high-power high-speed motor wind path structure |
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| CN (1) | CN114142637B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683700B (en) * | 2023-08-03 | 2023-10-27 | 山西电机制造有限公司 | Internal cooling air path optimizing structure of automobile chassis dynamometer motor |
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| WO2008043354A2 (en) * | 2006-10-14 | 2008-04-17 | Antriebstechnik Katt Hessen Gmbh | Cooling system for highly utilized rotating electrical machines |
| CN201869024U (en) * | 2010-11-30 | 2011-06-15 | 东方电气集团东方电机有限公司 | Ventilation structure of permanent magnet generator |
| CN103023217A (en) * | 2012-12-18 | 2013-04-03 | 上海电机学院 | Overall machine wind path structure of high-power and high-peed permanent magnet synchronous motor |
| CN210927353U (en) * | 2019-11-08 | 2020-07-03 | 卧龙电气南阳防爆集团股份有限公司 | Low-vibration low-noise vertical motor |
| CN112260485A (en) * | 2020-11-30 | 2021-01-22 | 卧龙电气南阳防爆集团股份有限公司 | Double-pumping interactive high-power-density motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655596B (en) * | 2016-11-21 | 2019-08-02 | 中车永济电机有限公司 | A kind of totally-enclosed machine self-ventilation cooling structure of internal-external double circulation |
-
2021
- 2021-11-30 CN CN202111436803.8A patent/CN114142637B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008043354A2 (en) * | 2006-10-14 | 2008-04-17 | Antriebstechnik Katt Hessen Gmbh | Cooling system for highly utilized rotating electrical machines |
| EP2076956A2 (en) * | 2006-10-14 | 2009-07-08 | Antriebstechnik Katt Hessen GmbH | Cooling system for highly utilized rotating electrical machines |
| CN201869024U (en) * | 2010-11-30 | 2011-06-15 | 东方电气集团东方电机有限公司 | Ventilation structure of permanent magnet generator |
| CN103023217A (en) * | 2012-12-18 | 2013-04-03 | 上海电机学院 | Overall machine wind path structure of high-power and high-peed permanent magnet synchronous motor |
| CN210927353U (en) * | 2019-11-08 | 2020-07-03 | 卧龙电气南阳防爆集团股份有限公司 | Low-vibration low-noise vertical motor |
| CN112260485A (en) * | 2020-11-30 | 2021-01-22 | 卧龙电气南阳防爆集团股份有限公司 | Double-pumping interactive high-power-density motor |
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| CN114142637A (en) | 2022-03-04 |
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