CN113965015B - Air cooling structure of outer rotor permanent magnet motor - Google Patents
Air cooling structure of outer rotor permanent magnet motor Download PDFInfo
- Publication number
- CN113965015B CN113965015B CN202111585129.XA CN202111585129A CN113965015B CN 113965015 B CN113965015 B CN 113965015B CN 202111585129 A CN202111585129 A CN 202111585129A CN 113965015 B CN113965015 B CN 113965015B
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- air
- half shaft
- outlet side
- air inlet
- side half
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
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- 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
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- 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
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses an air cooling structure of an outer rotor permanent magnet motor, which comprises a stator core, an air inlet side half shaft and an air outlet side bearing support, wherein the air inlet side half shaft and the air outlet side bearing support are connected to two ends of the stator core and form a hollow channel for ventilation after being connected, a cooling fan is installed at one end of an air inlet of the air inlet side half shaft, the air outlet side half shaft is arranged in a central through hole of the air outlet side bearing support, an air duct inner check ring is arranged in the central through hole of the stator core and connected to the air outlet side half shaft, a plurality of air duct baffle plates are arranged on the air duct inner check ring, one end of the air outlet side half shaft is connected to the air outlet side supporting seat, and one side of an air inlet of the air inlet side half shaft is connected to the air inlet side supporting seat. The stator core heat exchanger is compact in layout and convenient and quick to install, cooling air directly exchanges heat with the stator core, the heat dissipation area is increased due to the design of the air channel baffle, the cooling air flow rate is increased due to the inner retainer ring of the air channel, the heat dissipation capacity of the motor is improved, and the air cooling power level is improved.
Description
Technical Field
The invention relates to the technical field of motors, in particular to an air cooling structure of an outer rotor permanent magnet motor.
Background
In a belt conveyor driving system, a traditional belt conveyor driving system generally adopts a driving mode of an asynchronous motor, a hydraulic coupler, a speed reducer and a driving roller, a transmission chain of the whole driving system is long, useless mechanical friction is increased invisibly, the whole loss of a driving device is increased, and the damage of any one component can directly cause the shutdown of the whole driving device. The traditional driving mode has the problems of low transmission efficiency, large operation and maintenance workload, large space required by equipment arrangement and the like.
In view of the defects and problems of the traditional electric roller, the outer rotor permanent magnet motor serves as the roller, the transmission mechanism of the belt conveyor is simplified, the speed reduction links such as a speed reducer are eliminated, the transmission efficiency and the reliability are improved, and meanwhile, the occupied area of the equipment is reduced. However, the stator of the outer rotor permanent magnet motor is arranged inside the rotor, and the self heat dissipation capability is poor, in order to solve the problem, the outer rotor permanent magnet motor generally adopts air cooling or water cooling, but for some sites, the adoption of water cooling not only increases the cost, but also brings the disadvantages of replacement of cooling liquid, occupation of extra space and the like, so that the air cooling is more convenient, but compared with the water cooling, the heat dissipation capability of the air cooling is poor, the temperature rise of the motor can be increased, and the power level of the outer rotor permanent magnet motor which allows the air cooling is limited.
Disclosure of Invention
The invention aims to provide an air cooling structure of an outer rotor permanent magnet motor, which has strong heat dissipation capability, reduces the temperature rise of the outer rotor permanent magnet motor and improves the power grade of the outer rotor permanent magnet motor capable of dissipating heat by air cooling.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to an air cooling structure of an outer rotor permanent magnet motor, which comprises a stator iron core, an air inlet side half shaft and an outlet side bearing support, wherein the air inlet side half shaft and the outlet side bearing support are connected at two ends of the stator iron core, the air inlet side half shaft and the outlet side bearing support are connected to form a hollow channel for ventilation, one end of an air inlet of the air inlet side half shaft is provided with a cooling fan, the outlet side half shaft is arranged in a central through hole of the outlet side bearing support, an air channel inner check ring is arranged in the central through hole of the stator iron core, one end, far away from the air inlet, of the air channel inner check ring is connected to the outlet side half shaft, a plurality of air channel baffles are arranged between the air channel inner check ring and the outlet side half shaft and the inner side wall of the hollow channel, and two end faces of the air channel baffles are connected with the air inlet side half shaft and the outlet side bearing support, the air duct baffle is connected with the air duct inner check ring and the outgoing line side half shaft, one end of the outgoing line side half shaft extending out of the outgoing line side bearing support is connected to the outgoing line side supporting seat, and one side of an air inlet of the air inlet side half shaft is connected to the air inlet side supporting seat.
Furthermore, the stator core is in interference fit with contact surfaces between the air inlet side half shaft and the outlet side bearing support, and the stator core and the air inlet side half shaft and the outlet side bearing support are welded together at the end part of the stator core.
Furthermore, the air duct baffle is axially arranged and comprises a long air duct baffle and a short air duct baffle, two end faces of the long air duct baffle are welded with the air inlet side half shaft and the wire outlet side bearing support, and the long air duct baffle is welded with the air duct inner retainer ring and the wire outlet side half shaft; two end faces of the short air duct baffle are welded with the air inlet side half shaft and the outlet side bearing support, and the short air duct baffle is welded with the air duct inner retainer ring; the contact surfaces of the long air duct baffle plate and the short air duct baffle plate and the stator core are in interference fit.
Furthermore, the long air duct baffles and the short air duct baffles are arranged in a plurality of and at intervals.
Furthermore, the cooling fan works to generate cooling air, the cooling air enters the hollow channel through the air inlet side half shaft, then enters the middle air channel formed by the stator core and the air channel inner check ring after being divided by the air channel inner check ring, and finally flows out from a gap between the outgoing line side half shaft and the outgoing line side bearing support.
Furthermore, the cooling air exchanges heat with the stator core, the long air channel baffle and the short air channel baffle when passing through the middle air channel, and the inner side of the stator core directly contacts with the cooling air during heat exchange.
Furthermore, an axial wire outlet hole and a radial wire outlet hole are arranged on the half shaft at the wire outlet side, the axial wire outlet hole is positioned on the central axis, and the axis of the radial wire outlet hole is perpendicular to the central axis of the axial wire outlet hole; and the exposed end surface of the half shaft at the wire outlet side is connected with a junction box, and a stator lead wire on the stator core is led to a wiring terminal on the junction box through the axial wire outlet hole.
Furthermore, an air inlet side half shaft rib plate is arranged at the step surface of the air inlet side half shaft, and an outlet side bearing support rib plate is arranged at the step surface of the outlet side bearing support.
Compared with the prior art, the invention has the beneficial technical effects that:
the air cooling structure of the outer rotor permanent magnet motor comprises a stator core, an air inlet side half shaft and an air outlet side bearing support, wherein the stator core, the air inlet side half shaft and the air outlet side bearing support are connected to form a hollow channel for ventilation; when the cooling device works, cooling air is generated by the cooling fan, enters the hollow channel through the air inlet side half shaft, then enters the middle air channel formed by the stator core and the air channel inner check ring after being shunted by the air channel inner check ring, and finally flows out from a gap between the wire outlet side half shaft and the wire outlet side bearing support. The invention has compact layout and convenient and fast installation, cooling air can directly exchange heat with the stator core, a centrifugal fan with higher air pressure can be adopted to increase the cooling air quantity, the air channel baffle plate increases the heat dissipation area, the check ring in the air channel increases the cooling air flow rate, the heat dissipation capability of the motor is improved, the temperature rise is reduced, the air cooling power grade of the outer rotor permanent magnet motor can be improved, and the reliability of the outer rotor permanent magnet motor is improved; in addition, the air inlet side half shaft and the wire outlet side half shaft can both adopt steel pipes, deep holes do not need to be drilled, the steel pipes are of welded structures, and the processing is convenient and fast.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic view of an air cooling structure of an outer rotor permanent magnet motor according to the present invention;
FIG. 2 is a front view of the structure of the duct baffle of the present invention;
FIG. 3 is a side view of the duct baffle structure of the present invention;
FIG. 4 is a schematic structural view of an inner retainer ring of an air duct according to the present invention;
description of reference numerals: 1. a stator core; 2. an air inlet side half shaft; 3. a half shaft at the outgoing line side; 4. an air duct inner retainer ring; 5. a support base at the side of the outlet wire; 6. a junction box; 7. a wire outlet side bearing support; 8. a cooling fan; 9. a radial wire outlet hole; 10. an air inlet side supporting seat; 11. a rib plate of a half shaft at the air inlet side; 12. a wire outlet side bearing support rib plate; 13. a short air duct baffle; 14. a long air duct baffle; 15. and an axial wire outlet hole.
Detailed Description
As shown in fig. 1-4, an air cooling structure of an outer rotor permanent magnet motor comprises a stator core 1, an air inlet side half shaft 2 and an outlet side bearing support 7, wherein the air inlet side half shaft 2 and the outlet side bearing support 7 are connected to two ends of the stator core 1, and the stator core 1, the air inlet side half shaft 2 and the outlet side bearing support 7 are connected to form a hollow channel for ventilation, wherein the stator core 1 is formed by laminating DW470-50 with a thickness of 0.5mm, pressing plates are arranged at two ends of the stator core and are axially fastened by using cylindrical pins, and a winding is arranged in a stator core slot; a cooling fan 8 is arranged at one end of an air inlet of the air inlet side half shaft 2, an outlet side half shaft 3 is arranged in a central through hole of the outlet side bearing support 7, an air duct inner retainer ring 4 is arranged in a central through hole of the stator core 1, one end of the air duct inner retainer ring 4, which is far away from the air inlet, is connected to the half shaft 3 on the wire outlet side, a plurality of air duct baffles are arranged between the air duct inner retainer ring 4 and the half shaft 3 at the outlet side and the inner side wall of the hollow channel, two end surfaces of the air duct baffle are connected with the air inlet side half shaft 2 and the wire outlet side bearing bracket 7, the air duct baffle is connected with the air duct inner retainer ring 4 and the wire outlet side half shaft 3, one end of the outgoing line side half shaft 3 extending out of the outgoing line side bearing support 7 is connected to the outgoing line side support seat 5, and one side of an air inlet of the air inlet side half shaft 2 is connected to the air inlet side support seat 10.
During operation, the cooling fan 8 works to generate cooling air, the cooling air enters the hollow channel through the air inlet side half shaft 2, then enters the middle air channel formed by the stator core 1 and the air channel inner retainer ring 4 after being shunted by the air channel inner retainer ring 4, and finally flows out from a gap between the outgoing line side half shaft 3 and the outgoing line side bearing support 7.
The stator core 1 is in interference fit with the contact surfaces between the air inlet side half shaft 2 and the outlet side bearing support 7, and the stator core 1 is welded together at the end part of the stator core 1.
As shown in fig. 2 and 3, the air duct baffle is axially arranged and comprises a long air duct baffle 14 and a short air duct baffle 13, two end faces of the long air duct baffle 14 are welded with the air inlet side half shaft 2 and the outlet side bearing support 7, and the long air duct baffle 14 is welded with the air duct inner retainer ring 4 and the outlet side half shaft 3; two end faces of the short air duct baffle 13 are welded with the air inlet side half shaft 2 and the outlet side bearing bracket 7, and the short air duct baffle 13 is welded with the air duct inner retainer ring 4; the contact surfaces of the long air duct baffle 14 and the short air duct baffle 13 and the stator core 1 are in interference fit. Specifically, long air duct baffle 14 and short air duct baffle 13 are provided with a plurality ofly and arrange at the interval to be the circumference equipartition, increase heat transfer area, promote the cooling effect. Specifically, as shown in fig. 4, the air inlet side of the inner retainer ring 4 of the air duct is of a tapered structure for reducing air inlet resistance.
And the cooling air exchanges heat with the stator core 1, the long air channel baffle 14 and the short air channel baffle 13 when passing through the middle air channel, and the inner side of the stator core 1 directly contacts with the cooling air during heat exchange.
An axial wire outlet hole 15 and a radial wire outlet hole 9 are formed in the wire outlet side half shaft 3, the axial wire outlet hole 15 is located on a central axis, and the axis of the radial wire outlet hole 9 is perpendicular to the central axis of the axial wire outlet hole 15; and the exposed end surface of the outgoing side half shaft 3 is connected with a junction box 6, and a stator lead wire on the stator core 1 is led to a wiring terminal on the junction box 6 through the axial wire outlet hole 15.
Specifically, the stepped surface of the air inlet side half shaft 2 is provided with an air inlet side half shaft rib plate 11, the stepped surface of the wire outlet side bearing support 7 is provided with a wire outlet side bearing support rib plate 12, the design of the air inlet side half shaft rib plate 11 and the wire outlet side bearing support rib plate 12 improves the supporting strength of parts, reduces deformation, and ensures the service life of the parts.
The processing and manufacturing process of the invention comprises the following steps:
firstly, sequentially manufacturing or preparing the components according to the structural composition, and then starting to manufacture the air cooling structure of the outer rotor permanent magnet motor;
then, welding the contact surface of the air duct inner retainer ring 4 and the outlet side half shaft 3, welding the joint surface of the short air duct baffle 13 and the long air duct baffle 14 and the combination of the air duct inner retainer ring 4 and the outlet side half shaft 3 according to the arrangement mode shown in fig. 2, welding the joint surface of the short air duct baffle 13 and the long air duct baffle 14 and the outlet side bearing support 7, and finally welding the joint surface of the short air duct baffle 13 and the long air duct baffle 14 and the inlet side half shaft 2 to form a support frame of the stator core 1;
then the stator iron core support frame is machined through turning, key groove milling, drilling and the like, the outer circle of the stator iron core support frame is finely turned, the assembled stator iron core 1 is sleeved into the stator iron core support frame in a hot-charging mode after the fine turning, and the end part of the stator iron core is welded with the joint surface of the air inlet side half shaft 2 and the wire outlet side bearing support 7;
then, the cooling fan 8 is a centrifugal fan, an inner hexagonal socket head cap screw is used for fixing a centrifugal fan assembling seat at the shaft end of the air inlet side half shaft 2, and a spigot is adopted for matching; and the junction box 6 is fixed at the shaft end of the half shaft 3 at the wire outlet side through a hexagon head bolt and is matched with a spigot.
And finally, the air inlet side half shaft 2 and the wire outlet side half shaft 3 are both provided with key grooves, the wire outlet side half shaft 3 is connected to the wire outlet side supporting seat 5 through a positioning key, and one side of an air inlet of the air inlet side half shaft 2 is connected to the air inlet side supporting seat 10 through a positioning key.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (6)
1. The utility model provides an outer rotor permanent-magnet machine's air-cooled structure, includes stator core (1), air inlet side semi-axis (2) and the side bearing bracket (7) of being qualified for the next round of competitions are connected the both ends of stator core (1), just stator core (1), air inlet side semi-axis (2) and the side bearing bracket (7) of being qualified for the next round of competitions form the cavity passageway of ventilation usefulness, its characterized in that: a cooling fan (8) is installed at one end of an air inlet of the air inlet side half shaft (2), a wire outlet side half shaft (3) is arranged in a central through hole of the wire outlet side bearing support (7), an air channel inner check ring (4) is arranged in the central through hole of the stator core (1), one end, far away from the air inlet, of the air channel inner check ring (4) is connected to the wire outlet side half shaft (3), a plurality of air channel baffles are arranged between the air channel inner check ring (4) and the wire outlet side half shaft (3) and the inner side wall of the hollow channel, two end faces of the air channel baffles are welded with the air inlet side half shaft (2) and the wire outlet side bearing support (7), the air channel baffles are connected with the air channel inner check ring (4) and the wire outlet side half shaft (3), one end, extending out of the wire outlet side half shaft (3), of the wire outlet side bearing support (7) is connected to the wire outlet side bearing support (5), one side of an air inlet of the air inlet side half shaft (2) is connected to the air inlet side supporting seat (10);
the contact surfaces of the stator core (1), the air inlet side half shaft (2) and the outlet side bearing support (7) are in interference fit, and the stator core (1) and the outlet side bearing support are welded together at the end part of the stator core (1);
the air channel baffle is axially arranged and comprises a long air channel baffle (14) and a short air channel baffle (13), two end faces of the long air channel baffle (14) are connected with the air inlet side half shaft (2) and the wire outlet side bearing support (7), and the long air channel baffle (14) is welded with the air channel inner retainer ring (4) and the wire outlet side half shaft (3); two end faces of the short air duct baffle (13) are welded with the air inlet side half shaft (2) and the outlet side bearing support (7), and the short air duct baffle (13) is welded with the air duct inner retainer ring (4); the contact surfaces of the long air duct baffle (14) and the short air duct baffle (13) and the stator core (1) are in interference fit; the inner hollow part of the air duct inner retainer ring is communicated with the outlet hole of the semi-axis at the outlet side.
2. The air cooling structure of the outer rotor permanent magnet motor according to claim 1, wherein: the long air duct baffles (14) and the short air duct baffles (13) are arranged in plurality at intervals.
3. The air cooling structure of the outer rotor permanent magnet motor according to claim 2, wherein: the cooling fan (8) works to generate cooling air, the cooling air enters the hollow channel through the air inlet side half shaft (2), then enters the middle air channel formed by the stator iron core (1) and the air channel inner check ring (4) after being shunted by the air channel inner check ring (4), and finally flows out from a gap between the outgoing line side half shaft (3) and the outgoing line side bearing support (7).
4. The air cooling structure of the outer rotor permanent magnet motor according to claim 3, wherein: the cooling air exchanges heat with the stator core (1), the long air channel baffle (14) and the short air channel baffle (13) when passing through the middle air channel, and the inner side of the stator core (1) is in direct contact with the cooling air during heat exchange.
5. The air cooling structure of the outer rotor permanent magnet motor according to claim 1, wherein: an axial wire outlet hole (15) and a radial wire outlet hole (9) are formed in the wire outlet side half shaft (3), the axial wire outlet hole (15) is located on a central axis, and the axis of the radial wire outlet hole (9) is perpendicular to the central axis of the axial wire outlet hole (15); and the exposed end surface of the outgoing line side half shaft (3) is connected with a junction box (6), and a stator lead wire on the stator core (1) is led to a wiring terminal on the junction box (6) through the axial line outlet hole (15).
6. The air cooling structure of the outer rotor permanent magnet motor according to claim 1, wherein: an air inlet side half shaft rib plate (11) is arranged at the step surface of the air inlet side half shaft (2), and an outlet side bearing support rib plate (12) is arranged at the step surface of the outlet side bearing support (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111585129.XA CN113965015B (en) | 2021-12-23 | 2021-12-23 | Air cooling structure of outer rotor permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111585129.XA CN113965015B (en) | 2021-12-23 | 2021-12-23 | Air cooling structure of outer rotor permanent magnet motor |
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| Publication Number | Publication Date |
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| CN113965015A CN113965015A (en) | 2022-01-21 |
| CN113965015B true CN113965015B (en) | 2022-03-15 |
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| CN202111585129.XA Active CN113965015B (en) | 2021-12-23 | 2021-12-23 | Air cooling structure of outer rotor permanent magnet motor |
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Citations (7)
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| CN101645629A (en) * | 2009-09-10 | 2010-02-10 | 华中科技大学 | Self-ventilation cooling device of external rotor permanent magnet synchronous machine |
| CN101944813A (en) * | 2010-09-26 | 2011-01-12 | 沈阳工业大学 | Outer rotor direct-drive permanent magnet synchronous motor for belt conveyer |
| CN102983680A (en) * | 2012-11-28 | 2013-03-20 | 沈阳工业大学 | Air and water hybrid cooling high-speed permanent-magnet motor |
| WO2016026214A1 (en) * | 2014-08-21 | 2016-02-25 | 江西工埠机械有限责任公司 | Low speed and high torque electric motor outer rotor, electric motor and related crane |
| CN106451915A (en) * | 2016-08-26 | 2017-02-22 | 中国船舶重工集团公司第七〇二研究所 | External rotor permanent magnet motor stator |
| CN211405758U (en) * | 2020-04-01 | 2020-09-01 | 江苏嘉轩智能工业科技股份有限公司 | Air-cooled outer rotor permanent magnet roller |
| WO2021196405A1 (en) * | 2020-04-01 | 2021-10-07 | 江苏嘉轩智能工业科技股份有限公司 | Air cooling structure of outer rotor electric roller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518738B (en) * | 2019-08-01 | 2021-01-19 | 西安交通大学 | Motor ventilation cooling structure and air-cooled motor based on dimpling |
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2021
- 2021-12-23 CN CN202111585129.XA patent/CN113965015B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645629A (en) * | 2009-09-10 | 2010-02-10 | 华中科技大学 | Self-ventilation cooling device of external rotor permanent magnet synchronous machine |
| CN101944813A (en) * | 2010-09-26 | 2011-01-12 | 沈阳工业大学 | Outer rotor direct-drive permanent magnet synchronous motor for belt conveyer |
| CN102983680A (en) * | 2012-11-28 | 2013-03-20 | 沈阳工业大学 | Air and water hybrid cooling high-speed permanent-magnet motor |
| WO2016026214A1 (en) * | 2014-08-21 | 2016-02-25 | 江西工埠机械有限责任公司 | Low speed and high torque electric motor outer rotor, electric motor and related crane |
| CN106451915A (en) * | 2016-08-26 | 2017-02-22 | 中国船舶重工集团公司第七〇二研究所 | External rotor permanent magnet motor stator |
| CN211405758U (en) * | 2020-04-01 | 2020-09-01 | 江苏嘉轩智能工业科技股份有限公司 | Air-cooled outer rotor permanent magnet roller |
| WO2021196405A1 (en) * | 2020-04-01 | 2021-10-07 | 江苏嘉轩智能工业科技股份有限公司 | Air cooling structure of outer rotor electric roller |
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| CN113965015A (en) | 2022-01-21 |
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